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WO2024094209A1 - 涡旋压缩机 - Google Patents

涡旋压缩机 Download PDF

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Publication number
WO2024094209A1
WO2024094209A1 PCT/CN2023/129851 CN2023129851W WO2024094209A1 WO 2024094209 A1 WO2024094209 A1 WO 2024094209A1 CN 2023129851 W CN2023129851 W CN 2023129851W WO 2024094209 A1 WO2024094209 A1 WO 2024094209A1
Authority
WO
WIPO (PCT)
Prior art keywords
scroll
guide portion
fixed
positioning component
fixed scroll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/129851
Other languages
English (en)
French (fr)
Inventor
李庆才
杨春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Copeland Climate Technologies Suzhou Co Ltd
Original Assignee
Copeland Climate Technologies Suzhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211377198.6A external-priority patent/CN118030514A/zh
Priority claimed from CN202222944729.7U external-priority patent/CN218493802U/zh
Application filed by Copeland Climate Technologies Suzhou Co Ltd filed Critical Copeland Climate Technologies Suzhou Co Ltd
Publication of WO2024094209A1 publication Critical patent/WO2024094209A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing

Definitions

  • the present disclosure relates to a scroll compressor.
  • Scroll compressors can be used in, for example, refrigeration systems, air-conditioning systems, and heat pump systems.
  • the compression mechanism of the scroll compressor is used as its main component to achieve compression of a working fluid (such as a refrigerant).
  • the compression mechanism includes a fixed scroll and a movable scroll that revolves relative to the fixed scroll. Both the fixed scroll and the movable scroll include an end plate and a spiral blade extending from one side of the end plate.
  • a series of moving compression chambers are formed between the spiral blades of the fixed scroll and the movable scroll, the volume of which gradually decreases from the radial outside to the radial inside, thereby compressing the working fluid.
  • the scroll compressor has axial flexibility, so that when the pressure in the compression chamber is too high, the spiral blades can be separated from the end plate to unload the high-pressure fluid and avoid damage to the compression mechanism.
  • the fixed scroll may get stuck in the housing of the scroll compressor, causing the scroll compressor to lose axial flexibility, and there is also a problem of wear between the fixed scroll and the housing due to contact.
  • One object of one or more embodiments of the present disclosure is to prevent the fixed scroll from being stuck in the housing and to reduce wear of the fixed scroll and the housing while achieving axial flexibility of the scroll compressor.
  • Another object of one or more embodiments of the present disclosure is to improve the reliability of a scroll compressor without increasing the weight of the scroll compressor.
  • a scroll compressor comprising: a shell; a movable scroll; and a fixed scroll, wherein the movable scroll is engaged with the fixed scroll in a meshing manner to form a series of compression chambers, and is characterized in that: the scroll compressor also includes a positioning mechanism, the positioning mechanism includes a first positioning component and a second positioning component, the first positioning component is fixed relative to the shell, the second positioning component is fixed to the fixed scroll, the first positioning component is provided with a first guide portion, the second positioning component is provided with a second guide portion, the first guide portion and the second guide portion are clearance-matched, so that the first guide portion can freely move axially in the second guide portion; the positioning mechanism is configured to limit the circumferential position of the fixed scroll by the mutual cooperation of the first guide portion and the second guide portion.
  • a scroll compressor which includes: a shell; a movable scroll; and a fixed scroll, wherein the movable scroll is engaged with the fixed scroll in a meshing manner to form a series of compression chambers, and is characterized in that: the scroll compressor also includes a positioning mechanism, the positioning mechanism includes a first positioning component and a second positioning component, the first positioning component is fixed relative to the shell, the second positioning component is fixed to the fixed scroll, the first positioning component is provided with a first guide portion and a first axial mating surface, the second positioning component is provided with a second guide portion and a second axial mating surface, the first guide portion and the second guide portion are suitable for cooperating with each other to guide the movement of the fixed scroll relative to the first positioning component, and the first axial mating surface can abut against the second axial mating surface to limit the axial movement range of the fixed scroll.
  • the positioning mechanism includes a first positioning component and a second positioning component, the first positioning component is fixed relative to the shell, the second positioning component is fixed to the fixed
  • the first guide portion is disposed at an axial end surface of the first positioning component and is clearance-matched with the second guide portion to guide the fixed scroll to perform axial movement relative to the first positioning component.
  • the axial end face of the first positioning component serves as the first axial mating surface and has an axial gap with the second axial mating surface during normal operation of the scroll compressor to allow the fixed scroll to move axially relative to the first positioning component and limit the axial movement range of the fixed scroll.
  • the first guide portion includes a plurality of first guide portions spaced apart in the circumferential direction, and correspondingly, the second guide portion includes a plurality of second guide portions spaced apart in the circumferential direction, and each first guide portion cooperates with a corresponding second guide portion.
  • the first positioning component is configured to be fixed to the positioning
  • the ring includes an annular body and a protrusion extending from the annular body toward the fixed vortex, the first guide portion protrudes from the axial free end surface of the protrusion toward the fixed vortex, and the axial free end surface of the protrusion forms the axial end surface of the first positioning component serving as the first axial matching surface.
  • the second positioning component is configured as an annular washer fixed to the fixed scroll
  • the second guide portion is configured as a hole arranged in the annular washer and a portion of the top surface of the annular washer forms the second axial mating surface
  • the first guide portion is configured as a pin mating with the hole.
  • the second positioning component is configured as a hollow sleeve fixed to the fixed scroll, a hole of the hollow sleeve forms the second guide portion, and the first guide portion is configured as a pin matched with the hole.
  • the hollow sleeve is provided with a head portion, the head portion extending beyond the surface of the corresponding portion when the hollow sleeve is fixed to the corresponding portion of the fixed scroll, and the top surface of the head portion forms the second axial mating surface.
  • the first guide portion and the second positioning component are made of a first material, and other parts of the scroll compressor except the first guide portion and the second positioning component are made of a second material, and the hardness of the first material is greater than that of the second material.
  • the first guide portion and the body of the first positioning component are formed as an integral piece.
  • the scroll compressor also includes a silencer cover, the first positioning component is also provided with a flange portion protruding radially outward, the shell is provided with a step portion, and the first positioning component is fixed relative to the shell by causing the flange portion to abut between the silencer cover and the step portion in the axial direction.
  • the positioning mechanism is configured to limit the radial position and circumferential position of the fixed vortex and to separate the outer circumferential surface of the fixed vortex from the inner circumferential surface of the housing by the cooperation between the first guide portion and the second guide portion.
  • FIG1 is a partial longitudinal sectional view showing a scroll compressor according to the related art
  • FIG. 2 is a partial longitudinal sectional view showing a scroll compressor according to a first embodiment of the present disclosure
  • FIG. 3 is an exploded perspective view showing a positioning mechanism and a fixed scroll of a scroll compressor according to a first embodiment of the present disclosure
  • FIG. 4 is a front view showing an assembled state of a positioning mechanism and a fixed scroll of a scroll compressor according to a second embodiment of the present disclosure.
  • FIG. 5 is an exploded perspective view showing a positioning mechanism and a fixed scroll of a scroll compressor according to a second embodiment of the present disclosure.
  • Fig. 1 is a partial longitudinal sectional view of a scroll compressor according to the related art.
  • the scroll compressor 1 may include a housing 10.
  • the housing 10 contains a compression mechanism including a fixed scroll 20 and a movable scroll 30.
  • the scroll compressor may also include components such as a motor and a drive shaft.
  • the fixed scroll 20 is arranged in the housing 10 by a small clearance fit.
  • the small clearance fit specifies that the outer diameter of the scroll 20 is slightly smaller than the inner diameter of the housing 10, so that the fixed scroll 20 can be freely installed in the housing 10, and at the same time, after installation, the fixed scroll 20 can move axially to a certain extent relative to the housing 10, but the radial movement of the fixed scroll relative to the housing is restricted. Radial limit.
  • the fixed scroll 20 may include a fixed scroll end plate 22 and a fixed scroll blade 24 formed on one side of the fixed scroll end plate 22.
  • the movable scroll 30 may include a movable scroll end plate 32 and a movable scroll blade 34 formed on one side of the movable scroll end plate 32.
  • the fixed scroll blade 24 and the movable scroll blade 34 can be engaged with each other, so that when the scroll compressor is running, a series of moving compression chambers with a volume gradually decreasing from the radial outer side to the radial inner side are formed between the fixed scroll blade and the movable scroll blade, thereby achieving compression of the working fluid.
  • the silencer cover 90 can be fixedly connected to the housing 10 and arranged above the fixed scroll 20. A predetermined axial spacing is retained between the upper side of the fixed scroll 20 and the silencer cover 90, so that the silencer cover 90 can allow the fixed scroll 20 to move to a certain extent in the axial direction while limiting the axial position of the fixed scroll 20.
  • axial sealing is required between the top of the fixed scroll blade 24 and the movable scroll end plate 32, and between the top of the movable scroll blade 34 and the fixed scroll end plate 22.
  • the cross ring can allow the movable scroll 30 to orbit relative to the fixed scroll 20 while preventing the movable scroll 30 from rotating.
  • the main bearing seat 50 is suitable for supporting the movable scroll 30 and the fixed scroll 20.
  • the positioning pin 80 is simultaneously engaged in the fixed scroll 20 and the main bearing seat 50, so that the fixed scroll 20 can be prevented from angularly deviating relative to the main bearing seat 50 and the housing 10, and the angular positioning of the fixed scroll 20 is maintained.
  • the fixed scroll 20 and the housing 10 will undergo a certain degree of thermal expansion due to the increase in temperature, which will cause the gap between the fixed scroll and the housing to decrease.
  • the fixed scroll may be stuck in the housing, which will cause the fixed scroll to lose its axial flexibility.
  • the gap between the fixed scroll and the housing is reduced, when the movable scroll revolves relative to the fixed scroll, the fixed scroll is affected by the movable scroll and swings, which makes it easy for the fixed scroll to come into direct contact with the housing, causing wear of the fixed scroll and the housing, affecting the reliability and service life of the scroll compressor.
  • the inventors have conceived an improved scroll compressor, which can avoid direct contact between the fixed scroll and the housing, thereby avoiding the fixed scroll from being stuck in the housing and causing the scroll compressor to lose axial flexibility, and reduces the wear of the fixed scroll and the housing.
  • FIGS. 2 to 5 wherein the same reference numerals in the drawings denote the same components and the specific description of these components will be omitted. State.
  • the scroll compressor according to the first embodiment of the present disclosure may include a housing 10 a , a compression mechanism including a fixed scroll 20 a and a movable scroll 30 , and a positioning mechanism PM.
  • the movable scroll 30 and the fixed scroll 20a are engaged in a meshing manner to form a series of compression chambers.
  • the fixed scroll 20a may include a fixed scroll end plate 22a and a fixed scroll blade 24a formed on one side of the fixed scroll end plate.
  • the movable scroll 30 may include a movable scroll end plate 32 and a movable scroll blade 34 formed on one side of the movable scroll end plate, and the fixed scroll blade 24a and the movable scroll blade 34 are engaged with each other to form a series of compression chambers.
  • the positioning mechanism PM may include a first positioning component 40 and a second positioning component, the first positioning component 40 may be fixed relative to the housing 10a, and the second positioning component may be fixed to the fixed scroll 20a.
  • the first positioning component 40 is provided with a first guide portion 44 and a first axial mating surface
  • the second positioning component is provided with a second guide portion 26a and a second axial mating surface
  • the first guide portion and the second guide portion are suitable for cooperating with each other to guide the movement of the fixed scroll 20a relative to the first positioning component 40, and the first axial mating surface can abut against the second axial mating surface to limit the axial movement range of the fixed scroll.
  • the movable scroll 30 moves around the fixed scroll 20a under the action of the drive shaft, and the fixed scroll 20a is subjected to the force applied by the movable scroll 30.
  • the fixed scroll is also constrained by the first guide portion 44 and the second guide portion 26a, and the first guide portion 44 and the second guide portion 26a cooperate with each other to limit the radial movement of the fixed scroll 20a relative to the first positioning component 40, thereby preventing the fixed scroll 20a from being radially displaced relative to the housing 10a, and avoiding direct contact between the fixed scroll 20a and the housing 10a.
  • the fixed scroll 20a moves axially upward toward the first positioning component 40 in the axial direction, so that the fluid in the compression chamber can leak to the low-pressure side through the gap between the top of the fixed scroll blade 24a and the movable scroll end plate 32 and the gap between the top of the movable scroll blade 34 and the fixed scroll end plate 22a to achieve unloading, thereby providing axial flexibility.
  • the first guide portion 44 and the second guide portion 26a cooperate with each other to guide the axial movement of the fixed scroll, ensuring that the fixed scroll 20a is fixed in the radial direction relative to the first positioning component 40 (and therefore relative to the housing 10a) during the axial movement, thereby avoiding direct contact between the fixed scroll 20a and the housing 10a, preventing the fixed scroll from getting stuck in the housing and causing the failure of the scroll compressor, and reducing the wear of the fixed scroll and the housing.
  • the first guide portion 44 may be disposed at the axial end surface 42 of the first positioning member 40 and may be clearance-matched with the second guide portion 26a to guide the fixed scroll 20a to move axially relative to the first positioning member 40.
  • the clearance fit herein means that the outer diameter of the first guide portion 44 that fits each other is slightly smaller than the inner diameter of the second guide portion 26a, so that the first guide portion 44 can freely move axially in the second guide portion 26a while the radial movement of the first guide portion 44 relative to the second guide portion 26a is restricted.
  • the axial end face 42 of the first positioning component can be used as a first axial mating surface, and when the scroll compressor is operating normally, there is an axial gap g between the first axial mating surface and the second axial mating surface to allow the fixed scroll 20a to move axially relative to the first positioning component and limit the axial movement range of the fixed scroll.
  • the first guide portion 44 may include a plurality of first guide portions spaced apart in the circumferential direction
  • the second guide portion 26a may include a plurality of second guide portions spaced apart in the circumferential direction, and each first guide portion cooperates with the corresponding second guide portion, so that the movement of the fixed vortex 20a can be guided at multiple circumferential positions, thereby achieving stable guiding and limiting of the fixed vortex 20a.
  • the positioning mechanism may be configured to define the radial position and the circumferential position of the fixed scroll by cooperation between the first guide portion and the second guide portion, and to space the outer circumferential surface of the fixed scroll from the inner circumferential surface of the housing by a predetermined distance.
  • the first positioning component 40 can be configured as a positioning ring fixed to the housing 10a, and the positioning ring can include an annular body 46 and a protrusion 48 extending from the annular body 46 toward the fixed vortex 20a, and the first guide portion 44 protrudes from the axial free end face of the protrusion 48 toward the fixed vortex 20a.
  • the axial free end face of the protrusion 48 forms the axial end face 42 of the first positioning component 40 used as the first axial mating surface.
  • the present application is not limited to this, and the first positioning component 40 can also be formed in other forms, for example, not including any protrusions, and the axial free end face of the annular component is used as the first axial mating surface.
  • the second positioning member can be configured as an annular gasket 28a fixed to the fixed vortex 20a, and the annular gasket 28a can be fixed to the threaded hole of the fixed vortex 20a by screws, for example.
  • the gap g refers to the distance between the axial end face 42 of the first positioning member 40 and the end face of the annular gasket 28a.
  • the second guide portion 26a can be configured as a hole arranged in the annular gasket 28a, and a portion of the top surface of the annular gasket 28a forms a second axial mating surface.
  • the first guide portion 44 can be configured as a pin that cooperates with the hole.
  • the first guide portion 44 and the second positioning component can be made of a first material
  • the other parts of the scroll compressor such as the fixed scroll 20a, the movable scroll 30 and the housing 10a
  • the hardness of the first material can be greater than the hardness of the second material.
  • the first material may include steel
  • the second material may include aluminum.
  • the annular gasket 28a and the guide pin can be made of a first material such as steel
  • the fixed scroll 20a, the movable scroll 30 and the housing 10a can be made of a second material such as aluminum.
  • the wear resistance of the first guide portion and the second guide portion can be improved, and the reliability of the use of the scroll compressor can be improved.
  • the scroll compressor body can be kept made of a lightweight aluminum material to avoid increasing the weight of the scroll compressor.
  • the first guide portion 44 is formed as an integral piece with the body of the first positioning member. Specifically, the first guide portion 44 (eg, a guide pin) made of a first material is fixed to the body of the first positioning member 40 made of a second material, thereby forming an integral piece therewith.
  • the first guide portion 44 eg, a guide pin
  • the fixed vortex 20a may also include a peripheral wall portion located at the radially outermost side around the fixed vortex blade 24a and a flange 242 extending radially outward from the outer peripheral surface of the peripheral wall portion.
  • the flange 242 of the fixed vortex 20a is arranged in the housing 10a through a small clearance fit.
  • the small clearance fit is to specify that the outer diameter of the flange 242 of the vortex 20a is slightly smaller than the inner diameter of the housing 10a, so that the fixed vortex 20a can be freely installed in the housing 10a, and at the same time, after installation, the fixed vortex 20a can move axially to a certain extent relative to the housing 10a, but the radial movement of the fixed vortex relative to the housing is limited.
  • the annular gasket 28a can be fixed to the flange 242 of the fixed vortex 20a.
  • the scroll compressor may further include a muffler cover 90 for separating the inner space of the scroll compressor into a high-pressure area and a low-pressure area.
  • the muffler cover 90 may abut against the first positioning member 40 to limit the axial position of the first positioning member 40 .
  • the first positioning component 40 can be fixed to the housing 10a by, for example, an interference fit.
  • the outer diameter of the annular body 46 of the first positioning component 40 can be greater than the outer diameter of the protrusion 48, so that a flange portion protruding radially outward can be formed at the radial outer surface of the annular body 46 and the protrusion 48.
  • the housing 10a can be provided with a step portion.
  • the flange portion of the first positioning component can be firmly placed on the step portion of the housing 10a.
  • the first positioning component is fixed relative to the housing 10a by causing the flange portion to be abutted between the muffler cover and the step portion in the axial direction.
  • the present application is not limited to this, and the first positioning component 40 can also be fixed to the housing 10a in other ways.
  • FIG. 4 is a front view showing a positioning mechanism and a fixed scroll of a scroll compressor according to a second embodiment of the present disclosure in an assembled state
  • FIG. 5 is an exploded perspective view showing a positioning mechanism and a fixed scroll of a scroll compressor according to a second embodiment of the present disclosure.
  • the scroll compressor has a similar structure to the scroll compressor according to the first embodiment of the present invention, wherein only the fixed scroll 20b shown in FIG. 5 replaces the fixed scroll 20a of the first embodiment of the present invention, and other structures of the scroll compressor remain basically unchanged.
  • the fixed scroll 20b of the scroll compressor may include a hollow sleeve disposed in the fixed scroll 20b without an annular gasket.
  • the second positioning component may be configured as a hollow sleeve and may be fixed to the fixed scroll 20b by any suitable means, for example, the hollow sleeve may be fixed to the orifice of the fixed scroll 20b by interference fit.
  • the second guide portion 26b is formed by the hole of the hollow sleeve.
  • the first guide portion 44 formed as a guide pin may be clearance-fitted in the hollow sleeve 26b.
  • the hollow sleeve may be provided with a head, and when the hollow sleeve is fixed to the corresponding part of the fixed scroll, the head of the hollow sleeve extends beyond the surface of the corresponding part of the fixed scroll, whereby the top surface of the head forms a second axial mating surface. There is a gap g in the axial direction between the axial end face 42 of the first positioning component 40 and the top surface of the head to limit the axial motion range of the fixed scroll 20b.
  • the hollow sleeve may also be formed of a second material having a greater hardness.
  • the first guide portion is formed as a guide pin protruding from the axial end face
  • the second guide portion is formed as a hole or a hollow sleeve arranged in the fixed vortex
  • the present disclosure is not limited to this, and other forms of the first guide portion and/or the second guide portion may also be used.
  • the first guide portion may be formed as a recess recessed from the axial free end face
  • the second guide portion may be formed as a convex portion protruding from the fixed vortex toward the first positioning component.
  • the first guide portion and the second guide portion may also be formed in other shapes such as square and rectangular, as long as the first guide portion and the second guide portion can cooperate with each other.
  • the scroll compressor disclosed in the present invention direct contact between the fixed scroll and the housing can be avoided, the fixed scroll is prevented from getting stuck in the housing and causing the scroll compressor to lose axial flexibility, and the wear of the fixed scroll and the housing is reduced.
  • the reliability of the scroll compressor can be improved while avoiding increasing the weight of the scroll compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

一种涡旋压缩机（1），其包括：壳体（10）；动涡旋（30）；以及定涡旋（20），动涡旋（30）与定涡旋（20）以彼此啮合的方式接合以形成一系列的压缩腔，涡旋压缩机（1）还包括定位机构（PM），定位机构（PM）包括第一定位部件（40）和第二定位部件，第一定位部件（40）相对于壳体（10）是固定的，第二定位部件固定至定涡旋（20），第一定位部件（40）设置有第一引导部（44）和第一轴向配合面，第二定位部件设置有第二引导部（26a、26b）和第二轴向配合面，第一引导部（44）与第二引导部（26a、26b）适于互相配合以引导定涡旋（20）相对于第一定位部件（40）的运动，第一轴向配合面能够与第二轴向配合面互相抵接以限定定涡旋（20）的轴向运动范围。

Description

涡旋压缩机
本申请要求以下中国专利申请的优先权：于2022年11月4日提交中国专利局的申请号为202211377198.6、发明创造名称为“涡旋压缩机”的中国专利申请；于2022年11月4日提交中国专利局的申请号为202222944729.7、发明创造名称为“涡旋压缩机”的中国专利申请。这些专利申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及一种涡旋压缩机。
背景技术
本部分的内容仅提供了与本公开相关的背景信息，其可能并不构成现有技术。
涡旋压缩机可以应用于例如制冷系统、空调系统和热泵系统中。涡旋压缩机的压缩机构作为其主要部件用于实现工作流体(例如制冷剂)的压缩。压缩机构包括定涡旋和相对于定涡旋平动绕动的动涡旋。定涡旋和动涡旋均包括端板和从端板的一侧延伸的螺旋叶片。当动涡旋相对于定涡旋绕动时，定涡旋和动涡旋的螺旋叶片之间形成体积从径向外侧向径向内侧逐渐减小的一系列移动的压缩腔，由此压缩工作流体。
期望的是涡旋压缩机具有轴向柔性，从而在压缩腔内的压力过高时，螺旋叶片可以与端板分离以卸载高压流体，避免压缩机构受到损害。然而，在涡旋压缩机的运行过程中，定涡旋可能会卡死在涡旋压缩机的壳体中从而导致涡旋压缩机失去轴向柔性，并且定涡旋与壳体之间还存在由于接触而发生磨损的问题。
因此，需要提供一种改进的涡旋压缩机。
发明内容
本公开的一个或多个实施方式的一个目的是在实现涡旋压缩机的轴向柔性的同时防止定涡旋卡死在壳体中并且减小定涡旋和壳体的磨损。
本公开的一个或多个实施方式的另一个目的是在不增加涡旋压缩机重量的同时提高涡旋压缩机的可靠性。
根据本公开的一个方面，提供了一种涡旋压缩机，包括：壳体；动涡旋；以及定涡旋，所述动涡旋与所述定涡旋以彼此啮合的方式接合以形成一系列的压缩腔，其特征在于：所述涡旋压缩机还包括定位机构，所述定位机构包括第一定位部件和第二定位部件，所述第一定位部件相对于所述壳体是固定的，所述第二定位部件固定至所述定涡旋，所述第一定位部件设置有第一引导部，所述第二定位部件设置有第二引导部，第一引导部与第二引导部间隙配合，使得第一引导部可以在第二引导部中自由地进行轴向运动；所述定位机构构造成通过所述第一引导部与所述第二引导部互相配合而能够限定所述定涡旋的周向位置。
根据本公开的一个方面，提供了一种涡旋压缩机，其包括：壳体；动涡旋；以及定涡旋，所述动涡旋与所述定涡旋以彼此啮合的方式接合以形成一系列的压缩腔，其特征在于：所述涡旋压缩机还包括定位机构，所述定位机构包括第一定位部件和第二定位部件，所述第一定位部件相对于所述壳体是固定的，所述第二定位部件固定至所述定涡旋，所述第一定位部件设置有第一引导部和第一轴向配合面，所述第二定位部件设置有第二引导部和第二轴向配合面，所述第一引导部与所述第二引导部适于互相配合以引导所述定涡旋相对于所述第一定位部件的运动，所述第一轴向配合面能够与所述第二轴向配合面互相抵接以限定所述定涡旋的轴向运动范围。
根据本公开的一个方面，所述第一引导部设置在所述第一定位部件的轴向端面处并且与所述第二引导部间隙配合，以引导所述定涡旋相对于所述第一定位部件进行轴向运动。
根据本公开的一个方面，所述第一定位部件的轴向端面用作所述第一轴向配合面并且在所述涡旋压缩机的正常运转时与所述第二轴向配合面在轴向上存在间隙，以允许所述定涡旋相对于所述第一定位部件进行轴向运动并且限定所述定涡旋的轴向运动范围。
根据本公开的一个方面，所述第一引导部包括在周向方向上间隔开的多个第一引导部，相应地所述第二引导部包括在周向方向上间隔开的多个第二引导部，每个第一引导部与相应的第二引导部配合。
根据本公开的一个方面，所述第一定位部件构造为固定至所述壳体的定位 环并且包括环形本体和从所述环形本体朝向所述定涡旋延伸的突出部，所述第一引导部从所述突出部的轴向自由端面朝向所述定涡旋突出并且所述突出部的轴向自由端面形成所述第一定位部件的用作所述第一轴向配合面的轴向端面。
根据本公开的一个方面，所述第二定位部件构造为固定至所述定涡旋的环形垫圈，所述第二引导部构造为设置在所述环形垫圈中的孔并且所述环形垫圈的顶表面的一部分形成所述第二轴向配合面，所述第一引导部构造为与所述孔配合的销。
根据本公开的一个方面，所述第二定位部件构造为固定至所述定涡旋的中空套筒，所述中空套筒的孔形成所述第二引导部，并且所述第一引导部构造为与所述孔配合的销。
根据本公开的一个方面，所述中空套筒设置有头部，所述头部在所述中空套筒固定至所述定涡旋的相应部分时延伸超出该相应部分的表面，所述头部的顶表面形成所述第二轴向配合面。
根据本公开的一个方面，所述第一引导部和所述第二定位部件由第一材料制成，所述涡旋压缩机的除了所述第一引导部和所述第二定位部件之外的其他部分由第二材料制成，所述第一材料的硬度大于所述第二材料的硬度。
根据本公开的一个方面，所述第一引导部与所述第一定位部件的本体形成为一体件。
根据本公开的一个方面，所述涡旋压缩机还包括消音盖，所述第一定位部件还设置有径向向外突出的凸缘部，所述壳体设置有台阶部，所述第一定位部件通过使所述凸缘部在轴向方向上被抵接在所述消音盖与所述台阶部之间而相对于所述壳体固定。
根据本公开的一个方面，所述定位机构构造成通过所述第一引导部与所述第二引导部互相配合而能够限定所述定涡旋的径向位置和周向位置并且使所述定涡旋的外周表面与所述壳体的内周表面相隔预定距离。
根据本公开的涡旋压缩机，可以避免定涡旋与壳体之间发生直接接触,从而防止了定涡旋卡死在壳体中并且减小了定涡旋和壳体的磨损。
从下文的详细描述中，本公开的其它应用领域将变得更为明显。应该理解的是，这些详细描述和具体示例，虽然示出了本公开的优选实施例，但是它们 旨在为了示例性说明的目的，而非试图限制本公开。
附图说明
通过以下参照附图的描述，本公开的一个或多个实施方式的特征和优点将变得更加容易理解，在附图中：
图1是示出了根据相关技术的涡旋压缩机的局部纵剖面图；
图2是示出了根据本公开的第一实施方式的涡旋压缩机的局部纵剖面图；
图3是示出了根据本公开的第一实施方式的涡旋压缩机的定位机构和定涡旋的分解立体图；
图4是示出了根据本公开的第二实施方式的涡旋压缩机的定位机构和定涡旋的组装状态下的主视图；以及
图5是示出了根据本公开的第二实施方式的涡旋压缩机的定位机构和定涡旋的分解立体图。
具体实施方式
现在将参照附图更全面地描述示例性实施方式。
提供示例性实施方式以使得本公开将是详尽的并且将向本领域技术人员更全面地传达范围。阐述了许多具体细节比如具体部件、装置和方法的示例，以提供对本公开的各实施方式的透彻理解。对本领域技术人员而言将清楚的是，不需要采用具体细节，示例性实施方式可以以许多不同的形式实施，并且也不应当理解为限制本公开的范围。在一些示例性实施方式中，不对公知的过程、公知的装置结构和公知的技术进行详细的描述。
图1是示出了根据相关技术的涡旋压缩机的局部纵剖面图。如图1所示，涡旋压缩机1可以包括壳体10。壳体10内容置有包括定涡旋20和动涡旋30的压缩机构。涡旋压缩机还可以包括马达和驱动轴等部件。
定涡旋20通过小间隙配合设置在壳体10内。小间隙配合是指定涡旋20的外径略小于壳体10的内径，使得定涡旋20可以自由地安装至壳体10中、同时在安装之后定涡旋20能够相对于壳体10在一定程度上沿轴向运动，但是定涡旋相对于壳体的径向运动受到限制。由此，通过壳体的内壁对定涡旋进行 径向限位。
定涡旋20可以包括定涡旋端板22以及形成在定涡旋端板22一侧的定涡旋叶片24。动涡旋30可以包括动涡旋端板32以及形成在动涡旋端板32一侧的动涡旋叶片34。定涡旋叶片24与动涡旋叶片34能够彼此接合，使得当涡旋压缩机运行时在定涡旋叶片和动涡旋叶片之间形成一系列体积在从径向外侧向径向内侧逐渐减小的移动的压缩腔，从而实现对工作流体的压缩。
消音盖90可以固定地连接至壳体10并且设置在定涡旋20的上方。定涡旋20上侧与消音盖90之间保留有预定的轴向间距，由此消音盖90在对定涡旋20轴向限位的同时可以允许定涡旋20沿轴向进行一定程度的运动。在涡旋压缩机正常运行时，定涡旋叶片24的顶端与动涡旋端板32之间以及动涡旋叶片34的顶端与定涡旋端板22之间需要轴向密封。当涡旋压缩机的压缩腔中的压力过大时，定涡旋20沿轴向运动远离动涡旋30，压缩腔中的流体将通过定涡旋叶片24的顶端与动涡旋端板32之间的间隙以及动涡旋叶片34的顶端与定涡旋端板22之间的间隙泄漏到低压侧以实现卸载，从而为涡旋压缩机10提供了轴向柔性。
十字滑环可以在防止动涡旋30发生自转的情况下允许动涡旋30相对于定涡旋20绕动。主轴承座50适于支承动涡旋30和定涡旋20。定位销80同时配合在定涡旋20和主轴承座50中，因此能够防止定涡旋20相对于主轴承座50以及壳体10发生角度偏离，保持定涡旋20的角度定位。
然而，在涡旋压缩机的工作过程中，定涡旋20和壳体10会由于温度升高发生一定程度的热膨胀，从而导致定涡旋与壳体之间的间隙减小。此时，即使定涡旋在动涡旋的转动过程中相对于壳体发生较小的移位，也可能使得定涡旋卡死在壳体中，这将导致定涡旋失去轴向柔性。此外，由于定涡旋与壳体之间的间隙减小，在动涡旋相对于定涡旋绕动时，定涡旋受到动涡旋的作用而发生摆动，这导致定涡旋容易与壳体发生直接接触，造成定涡旋和壳体的磨损，影响涡旋压缩机的使用可靠性及使用寿命。
为了解决上述问题，本发明人构想出了一种改进的涡旋压缩机，该涡旋压缩机能够避免定涡旋与壳体发生直接接触，从而避免了定涡旋卡死在壳体中而导致涡旋压缩机失去轴向柔性，并且减小了定涡旋和壳体的磨损。
下面就结合图2至图5对根据本公开的涡旋压缩机做进一步详细的说明，其中，附图中相同的附图标记表示相同的部件并将省略对这些部件的具体描 述。
如图2和图3所示，根据本公开的第一实施方式的涡旋压缩机可以包括壳体10a、具有定涡旋20a和动涡旋30的压缩机构以及定位机构PM。
动涡旋30和定涡旋20a以彼此啮合的方式接合以形成一系列的压缩腔。具体地，定涡旋20a可以包括定涡旋端板22a和形成在定涡旋端板一侧的定涡旋叶片24a。动涡旋30可以包括动涡旋端板32和形成在动涡旋端板一侧的动涡旋叶片34，定涡旋叶片24a与动涡旋叶片34彼此接合以形成一系列压缩腔。
定位机构PM可以包括第一定位部件40和第二定位部件，第一定位部件40相对于壳体10a可以是固定的，第二定位部件可以固定至定涡旋20a。第一定位部件40设置有第一引导部44和第一轴向配合面，第二定位部件设置有第二引导部26a和第二轴向配合面，第一引导部与第二引导部适于互相配合以引导定涡旋20a相对于第一定位部件40的运动，第一轴向配合面能够与第二轴向配合面互相抵接以限定定涡旋的轴向运动范围。
以此方式，当涡旋压缩机正常运行时，动涡旋30在驱动轴的作用下绕定涡旋20a进行平动，定涡旋20a会受到动涡旋30施加的作用力。然而，定涡旋还受到第一引导部44和第二引导部26a的约束，第一引导部44与第二引导部26a互相配合以限制定涡旋20a相对于第一定位部件40发生径向运动，从而防止了定涡旋20a相对于壳体10a发生径向移位，避免了定涡旋20a与壳体10a之间发生直接接触。由此，可以防止定涡旋卡死在壳体中而导致涡旋压缩机失去轴向柔性，并且减小定涡旋和壳体的磨损。
当涡旋压缩机的压缩腔中的压力过大时，定涡旋20a沿轴向方向朝向第一定位部件40轴向向上移动，以使得压缩腔中的流体能够通过定涡旋叶片24a的顶端与动涡旋端板32之间的间隙以及动涡旋叶片34的顶端与定涡旋端板22a之间的间隙泄漏到低压侧以实现卸载，从而提供轴向柔性。在定涡旋轴向移动的过程中，第一引导部44和第二引导部26a互相配合以对定涡旋的轴向运动进行引导，确保定涡旋20a在轴向运动的过程中相对于第一定位部件40(以及因此相对于壳体10a)在径向方向上位置固定，从而避免了定涡旋20a与壳体10a之间发生直接接触,防止了定涡旋卡死在壳体中而导致涡旋压缩机的失效，并且减小了定涡旋和壳体的磨损。
第一引导部44可以设置在第一定位部件40的轴向端面42处并且与第二引导部26a间隙配合，以引导定涡旋20a相对于第一定位部件40进行轴向运 动。本文中间隙配合是指相互配合的第一引导部44的外径略小于第二引导部26a的内径，使得第一引导部44可以在第二引导部26a中自由地进行轴向运动同时第一引导部44相对于第二引导部26a的径向运动受到限制。
第一定位部件的轴向端面42可以用作第一轴向配合面，并且在涡旋压缩机的正常运转时，第一轴向配合面与第二轴向配合面在轴向上存在间隙g，以允许定涡旋20a相对于第一定位部件进行轴向运动并且限定定涡旋的轴向运动范围。
优选地，如图3所示，第一引导部44可以包括在周向方向上间隔开的多个第一引导部，相应地第二引导部26a可以包括在周向方向上间隔开的多个第二引导部，每个第一引导部与相应的第二引导部配合，从而能够在周向的多个位置对定涡旋20a的运动进行引导，由此实现对定涡旋20a稳固地引导限位。
定位机构可以构造成通过第一引导部与第二引导部互相配合而能够限定定涡旋的径向位置和周向位置，并且使定涡旋的外周表面与所述壳体的内周表面相隔预定距离。
如图3所示，第一定位部件40可以构造为固定至壳体10a的定位环,定位环可以包括环形本体46和从环形本体46朝向定涡旋20a延伸的突出部48，第一引导部44从突出部48的轴向自由端面朝向定涡旋20a突出。在此，突出部48的轴向自由端面形成第一定位部件40的用作第一轴向配合面的轴向端面42。当然，本申请不限于此，第一定位部件40也可以形成为其他形式，例如不包括任何的突出部，并且由环形部件的轴向自由端面用作第一轴向配合面。
继续参照图3，第二定位部件可以构造为固定至定涡旋20a的环形垫圈28a，环形垫圈28a例如可以通过螺钉固定至定涡旋20a的螺纹孔中。在此，间隙g指的是第一定位部件40的轴向端面42与环形垫圈28a的端面之间的距离。
第二引导部26a可以构造为设置在环形垫圈28a中的孔,并且环形垫圈28a的顶表面的一部分形成第二轴向配合面。第一引导部44可以构造为与孔配合的销。以此方式，通过简单且低成本的方式能够实现对定涡旋的定位，从而避免定涡旋20a与壳体10a之间发生直接接触,防止了定涡旋卡死在壳体中而导致涡旋压缩机失去轴向柔性，并且减小了定涡旋和壳体的磨损。特别是，根据本申请的涡旋压缩机对压缩机构特别是定涡旋的整体结构几乎不需要进行改型，可以在确保定涡旋机械强度的情况下实现对定涡旋的稳固的定位。
第一引导部44和第二定位部件可以由第一材料制成，涡旋压缩机的其他部分(比如定涡旋20a、动涡旋30和壳体10a)可以由第二材料制成，第一材料的硬度可以大于第二材料的硬度。例如，第一材料可以包括钢，并且第二材料可以包括铝。在根据本申请的第一实施方式的涡旋压缩机中，环形垫圈28a和引导销可以由例如钢的第一材料制成，而定涡旋20a、动涡旋30和壳体10a可以由例如铝的第二材料制成。以此方式，一方面可以改善第一引导部和第二引导部的耐磨性能，提高涡旋压缩机的使用可靠性，另一方面还可以保持涡旋压缩机主体使用轻质的铝材料制成，避免增加涡旋压缩机的重量。
在根据本申请的涡旋压缩机中，第一引导部44与第一定位部件的本体形成为一体件。具体地，由第一材料制成的第一引导部44(例如引导销)固定至由第二材料制成的第一定位部件40的本体，从而与之形成为一体件。
参照图2，定涡旋20a还可以包括围绕定涡旋叶片24a的位于径向最外侧的周壁部以及从周壁部的外周面径向向外延伸的凸缘242。定涡旋20a的凸缘242通过小间隙配合设置在壳体10a内。在此，小间隙配合是指定涡旋20a的凸缘242的外径略小于壳体10a的内径，使得定涡旋20a可以自由地安装至壳体10a中、同时在安装之后定涡旋20a能够相对于壳体10a在一定程度上沿轴向运动，但是定涡旋相对于壳体的径向运动受到限制。环形垫圈28a可以固定至定涡旋20a的凸缘242。
如图2所示，涡旋压缩机还可以包括消音盖90，消音盖用于将所述涡旋压缩机的内部空间分隔为高压区域和低压区域。消音盖90可以抵接第一定位部件40以限制第一定位部件40的轴向位置。
第一定位部件40例如可以通过过盈配合固定至壳体10a内。第一定位部件40环形本体46的外径可以大于突出部48的外径，由此在环形本体46与突出部48的径向外表面处可以形成有径向向外突出的凸缘部。壳体10a可以设置有台阶部。第一定位部件的凸缘部可以稳固地安置在壳体10a的台阶部上。由此，第一定位部件通过使凸缘部在轴向方向上被抵接在消音盖与台阶部之间而相对于壳体10a固定。当然，本申请不限于此，第一定位部件40也可以以其他方式固定至壳体10a。
图4为示出了根据本公开的第二实施方式的涡旋压缩机的定位机构和定涡旋的组装状态下的主视图，并且图5为示出了根据本公开的第二实施方式的涡旋压缩机的定位机构和定涡旋的分解立体图。根据本公开的第二实施方式的 涡旋压缩机与根据本发明的第一实施方式的涡旋压缩机结构类似，其中，仅用图5所示的定涡旋20b代替了本发明的第一实施方式的定涡旋20a，涡旋压缩机的其他构造基本不变。
如图5所示，根据本公开的第二实施方式的涡旋压缩机的定涡旋20b可以包括设置在定涡旋20b中的中空套筒而不含环形垫圈。第二定位部件可以构造为中空套筒并且可以通过任何合适的方式固定至定涡旋20b,例如，中空套筒可以通过过盈配合固定至定涡旋20b的孔口中。此时，第二引导部26b由中空套筒的孔形成。形成为引导销的第一引导部44可以间隙配合在中空套筒26b中。中空套筒可以设置有头部，在中空套筒固定至定涡旋的相应部分时，中空套筒的头部延伸超出定涡旋相应部分的表面，由此，该头部的顶表面形成第二轴向配合面。第一定位部件40的轴向端面42与该头部的顶表面在轴向上存在间隙g，以限定定涡旋20b的轴向运动范围。
与根据本申请的第一实施方式的环形垫圈类似地，中空套筒也可以由硬度较大的第二材料形成。
尽管在本文中示意性地描述了第一引导部形成为从轴向端面突出的引导销，第二引导部形成为设置在定涡旋中的孔或中空套筒，但是本领域技术人员可以理解的是，本公开不限于此，也可以使用其他形式的第一引导部和/或第二引导部，例如第一引导部可以形成为从轴向自由端面凹入的凹口，并且第二引导部可以形成为从定涡旋朝向第一定位部件突出的凸部，此外，第一引导部和第二引导部也可以形成为方形、矩形等其他形状，只要第一引导部和第二引导部可以互相配合即可。
根据本公开的涡旋压缩机，可以避免定涡旋与壳体之间发生直接接触,防止了定涡旋卡死在壳体中而导致涡旋压缩机失去轴向柔性，并且减小了定涡旋和壳体的磨损。此外，根据本公开的涡旋压缩机还可以在避免增加涡旋压缩机的重量的同时提高涡旋压缩机的使用可靠性。
虽然已经参照示例性实施方式对本公开进行了描述，但是应当理解，本公开并不局限于文中详细描述和示出的具体实施方式，在不偏离权利要求书所限定的范围的情况下，本领域技术人员可以对示例性实施方式做出各种改变。还应理解的是，在技术方案不矛盾的情况下，各个实施方式的特征可以相互结合或者可以省去。

Claims (5)

  1. 一种涡旋压缩机，包括：
    壳体；
    动涡旋；以及
    定涡旋，所述动涡旋与所述定涡旋以彼此啮合的方式接合以形成一系列的压缩腔，
    其特征在于：
    所述涡旋压缩机还包括定位机构，所述定位机构包括第一定位部件和第二定位部件，所述第一定位部件相对于所述壳体是固定的，所述第二定位部件固定至所述定涡旋，
    所述第一定位部件设置有第一引导部，所述第二定位部件设置有第二引导部，第一引导部与第二引导部间隙配合，使得第一引导部可以在第二引导部中自由地进行轴向运动；
    所述定位机构构造成通过所述第一引导部与所述第二引导部互相配合而能够限定所述定涡旋的周向位置。
  2. 根据权利要求1所述涡旋压缩机，其特征在于，
    所述第二定位部件构造为固定至所述定涡旋的中空套筒，所述中空套筒的孔形成所述第二引导部，并且所述第一引导部构造为与所述孔配合的销。
  3. 根据权利要求1所述涡旋压缩机，其特征在于，
    所述第一引导部和所述第二定位部件由第一材料制成，所述涡旋压缩机的除了所述第一引导部和所述第二定位部件之外的其他部分由第二材料制成，所述第一材料的硬度大于所述第二材料的硬度。
  4. 根据权利要求1所述涡旋压缩机，其特征在于，
    所述第一引导部与所述第一定位部件的本体形成为一体件。
  5. 根据权利要求1所述涡旋压缩机，其特征在于，
    所述涡旋压缩机还包括消音盖，所述第一定位部件还设置有径向向外突出的凸缘部，所述壳体设置有台阶部，所述第一定位部件通过使所述凸缘部在轴向方向上被抵接在所述消音盖与所述台阶部之间而相对于所述壳体固定。
PCT/CN2023/129851 2022-11-04 2023-11-06 涡旋压缩机 Ceased WO2024094209A1 (zh)

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CN202222944729.7U CN218493802U (zh) 2022-11-04 2022-11-04 涡旋压缩机
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1147063A (zh) * 1995-07-18 1997-04-09 松下电器产业株式会社 具有非轨迹运动涡旋件定位装置的涡旋式压缩机
JPH1122660A (ja) * 1997-07-07 1999-01-26 Toshiba Corp スクロール式圧縮機
CN202381334U (zh) * 2011-12-21 2012-08-15 艾默生环境优化技术(苏州)有限公司 涡旋压缩机
CN108779774A (zh) * 2016-03-16 2018-11-09 松下知识产权经营株式会社 涡旋式压缩机
CN113586442A (zh) * 2020-04-30 2021-11-02 艾默生环境优化技术(苏州)有限公司 涡旋压缩机
CN218493802U (zh) * 2022-11-04 2023-02-17 艾默生环境优化技术(苏州)有限公司 涡旋压缩机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1147063A (zh) * 1995-07-18 1997-04-09 松下电器产业株式会社 具有非轨迹运动涡旋件定位装置的涡旋式压缩机
JPH1122660A (ja) * 1997-07-07 1999-01-26 Toshiba Corp スクロール式圧縮機
CN202381334U (zh) * 2011-12-21 2012-08-15 艾默生环境优化技术(苏州)有限公司 涡旋压缩机
CN108779774A (zh) * 2016-03-16 2018-11-09 松下知识产权经营株式会社 涡旋式压缩机
CN113586442A (zh) * 2020-04-30 2021-11-02 艾默生环境优化技术(苏州)有限公司 涡旋压缩机
CN218493802U (zh) * 2022-11-04 2023-02-17 艾默生环境优化技术(苏州)有限公司 涡旋压缩机

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