WO2004104421A1 - Scroll plate and manufacture method thereof - Google Patents

Abstract

A scroll plate comprises a orbiting scroll plate and a fixed scroll plate consisted of plate bodies and corresponding end plates; one of the orbiting scroll plate and the fixed scroll plate is made of metal materials, the other is made of nonmetal materials with elasticity and plasticity property, the two scroll plates are sealed and compensated each other in axial and radial direction during orbiting cooperatively by making use of characteristic of materials. In order to convert the original linearly contact of the two scroll plates into surface contact, a scroll plate according to the invention is made of elastic and plastic materials, thus, sealing is achieved by extrusion through materials distortion. At the same time, the two scroll plates are made by modeling so that mechanism process and surface stiffen process are omitted, and the rigidity of oxidation film formed in the surface of workpiece is increased. Additionally, because the two scroll plates are made of soft and hard materials respectively, the requests of precision and contour tolerance in scroll plates are reduced during orbiting cooperatively, accordingly reducing manufacture costs, noises and vibration, also making performance of anti-abrade better and prolonging life of use.

Description

 Scroll and manufacturing method thereof

Technical field

 The present invention relates to a scroll plate of a scroll compressor, and in particular, to a scroll plate of a scroll compressor of low cost and high performance. Background technique

 In scroll compressors, traditional two-moving and static scrolls are made of metal. As shown in FIG. 1, the two metal discs of the orbiting scroll 10 and the orbiting scroll 20 cooperate with each other. It is very easy to produce large noise and vibration, and it is easy to wear each other, and even to damage each other. To overcome this defect, the conventional method is to take certain measures on the mechanism to make it radial and axial Concession to each other, that is, axial and radial compensation, but its mechanism is very complicated; when the moving scroll 10 and the static scroll 20 are in operation, the contact force on the side of the vortex line depends only on the moving vortex The circumferential centrifugal force of the disk 10 has a small contact force; moreover, since the sides of the two spiral scrolls of the orbiting scroll 10 and the static scroll 20 are in line contact, see point A in FIG. 1, it is difficult to achieve a sealed Purpose, it is easy to leak, so the requirements for the accuracy of the scroll line, wall thickness, height, flatness of the top and bottom, and the perpendicularity of the scroll wall surface and bottom surface are particularly high, and its accuracy is decisive for the performance of the scroll compressor influences. Therefore, people are always trying to improve and ensure its accuracy, but the improvement of accuracy also involves the performance and manufacturing cost of processing machine tools; however, the deformation of the scroll caused by heat and external force during work will cause excessive precision to be lost Significance; therefore, the conventional optimum form and position tolerance value is in the range of 8 to 15 microns (Editor of the Volumetric Compressor Manual, Yu Yongzhang, Beijing Machinery Industry Press, October 2000). Such high accuracy is suitable for machining machine tools and tools The requirements for both tooling and fixtures are very high. Only imported special equipment can meet its accuracy requirements. In addition, after the scroll line is mechanically processed, surface hardening treatments such as surface anodizing treatment, nickel-phosphorus treatment, and nitriding treatment are also required, which makes the manufacturing of scroll compressors difficult, high processing costs, and poor performance. It is difficult to generalize and apply. Summary of the Invention

The object of the present invention is to provide a scroll and a manufacturing method thereof. By changing the materials of the scrolls, when the two scrolls are operated in cooperation, the two scrolls are brought into contact with each other to achieve sealing by utilizing the material characteristics. Simultaneous axial and radial compensation; In addition, reduce operating noise and vibration, vortex Discs are more abrasion-resistant, have a longer service life, and reduce the requirements for scroll precision and form and position tolerances, thereby reducing manufacturing costs

 The technical solution of the present invention is: a scroll, comprising a movable scroll and a stationary scroll composed of a scroll-shaped disc body and a corresponding bottom plate; any one of the movable scroll and the stationary scroll The scroll is made of metal material, and the other scroll is made of non-metal material with elastic deformation and plastic deformation. By using the characteristics of the material, the two scrolls can achieve sealing and axial and radial when they cooperate with each other. Mutual compensation.

 The orbiting scroll or the orbiting scroll is made of a metallic material, and the orbiting scroll or the orbiting scroll is made of a non-metallic material having elastic deformation and plastic deformation.

 The scroll plate and the scroll plate are also provided with a skeleton.

 The skeleton is a perforated sheet; the perforated sheet is made of metal or plastic.

 The skeleton and the bottom plate are an integrated structure.

 The non-metal material is any material selected from engineering plastics, phenolic resins, or epoxy resins.

 The manufacturing method of the scroll of the present invention includes the following steps:

 Use a thin plate to make a spiral disk body;

 Fixed on the metal base plate;

 The outer surface of the spiral disc body and the bottom of the groove between the spiral disc body and the metal base plate are injection-molded or coated with an elastic material to form a scroll disc.

 Wherein, the elastic material is polytetrafluoroethylene, polyurethane or synthetic rubber.

 In addition, another method for manufacturing the scroll of the present invention includes the following steps:

 Thin sheet coated with elastic material;

 And then made into a vortex disk body;

 It is then fixed on a metal base plate to form a scroll.

 Another method for manufacturing the scroll of the present invention includes the following steps:

 On the metal base plate, a spiral-shaped disc body skeleton is formed by injection molding. Then, an elastic material is injected or coated on the skeleton and the metal base plate.

 The fourth method for manufacturing the scroll of the present invention is to form a scroll on a metal base plate by using an elastic material by injection molding.

Beneficial effects of the present invention One of the movable scroll and the static scroll of the present invention is made of metal, and the other scroll is made of a non-metal material having elastic deformation and plastic deformation. When the two scrolls are operated in cooperation, Using the characteristics of elastic deformation and plastic deformation of one of the scrolls, the contact between the two scrolls is changed from the original line contact to the surface contact, and the material is deformed to achieve the purpose of sealing by squeezing. The lower shape Tolerances such as about 100 microns can meet its technical requirements, and at the same time solve the complex compensation of axial and radial deformation and thermal expansion caused by external forces and high temperatures; In addition, the two scrolls are made by the mold, saving Without the complicated procedures of machining and surface hardening, the hardness of the oxide layer formed on the surface of the workpiece processed by the mold is higher than the hardness of the surface hardening treatment; moreover, because the two scrolls are made of Made of two materials, reducing noise and vibration, more wear-resistant, longer service life, while reducing the requirements for accuracy and form and position tolerances, While reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

 Figure 1 is a schematic diagram of the matching of the existing dynamic and static vortex scrolls.

 Fig. 2 is a sectional view of a movable scroll of the present invention.

 Fig. 3 is a sectional view of a stationary scroll of the present invention.

 Fig. 4 is a sectional view of the frame of the static scroll of the present invention.

 Fig. 5 is a sectional view of the static scroll according to the present invention after spraying an elastic material.

 FIG. 6 is a cross-sectional view of the structure of the fixed scroll frame and the bottom plate of the present invention.

 FIG. 7 is a cross-sectional view of the structure of an integrally-moulded scroll body of the static scroll of the present invention.

 FIG. 8 is a schematic diagram of the cooperation of the movable and static scrolls of the present invention.

 FIG. 9 is a schematic diagram of axial compensation of a movable scroll and a static scroll of the present invention. detailed description

 Referring to FIG. 2 and FIG. 3, the scroll of the present invention includes an orbiting scroll 1, a stationary scroll 2; wherein the orbiting scroll 1 is composed of a scroll-shaped disc body 12 and a bottom plate 11, and the stationary scroll 2 is composed of a scroll-shaped disk body 22 and a bottom plate 21; the movable scroll 1 is made of a metal material, and the static scroll 2 is made of a non-metal material having elastic deformation and plastic deformation.

Please refer to FIG. 4 and FIG. 5 again, the static scroll 2 scroll-shaped disc body 22 is further provided with a skeleton 23. The skeleton 23 is provided with a plurality of holes 24, and a bottom plate 21 connected to the skeleton 23 is opened. With holes 25, The outer surface of the skeleton 23 and the bottom plate 21 and the groove bottom 26 connected to the skeleton 23 are injection molded or coated with the elastic material 3.

 Referring to FIG. 6, the static scroll 1 and the scroll-shaped disk body 22, the skeleton 23 and the bottom plate 21 may be an integrated structure.

 2 to FIG. 5, which shows a method for manufacturing a scroll plate according to the present invention. A scroll plate 22 is made of a thin plate, and a plurality of holes 24 are formed on the thin plate. The thin plate is metal and is fixed on the metal base plate 21. The outer surface of the spiral disk body 22 and the groove bottom between the spiral disk body 22 and the metal base plate 21 are injection-molded or coated with the elastic material 3, and the holes 21 formed on the thin plate can increase the bonding strength of the composite material.

 The non-metallic material includes polytetrafluoroethylene, polyurethane or synthetic rubber.

 Referring to FIG. 6, there is shown another manufacturing method of the scroll of the present invention. The scroll 23 of the spiral disk body 22 is formed on the metal base plate 21 by integral molding, and then the skeleton 23 and the metal base plate 21 are formed. Injection molding or coating of elastic materials.

 Please refer to FIG. 7 again, which shows another manufacturing method of the scroll of the present invention. That is, directly on the metal base plate 21, the spiral disk body 22 is formed by injection molding with an elastic material, and the scroll is manufactured. Plate 2.

 Referring to FIG. 8, it is shown that the movable scroll 1 and the static scroll 2 of the present invention work together. Since the static scroll 2 is made of an elastic material having elastic deformation and plastic deformation, it is made of metal. The orbiting scroll 1 is in contact, the orbiting scroll 1 and the stationary scroll 2 are in surface contact with each other. The surface B is in surface contact. By squeezing and deforming, the seal is achieved, which solves the axial and radial compensation while reducing It meets the requirements for the accuracy and shape and position tolerance of the scroll, which reduces the manufacturing cost.

 Referring to FIG. 9, which shows that when the orbiting scroll 1 and the orbiting scroll 2 of the present invention are operated in cooperation, due to the external force and high temperature, they are squeezed and deformed. The orbiting scroll 1 and the orbiting scroll 2 are generated. Axial deformation, as shown in C and D in the figure, solves the axial and radial compensation.

In summary, one of the orbiting scroll and the stationary scroll of the present invention is made of metal, and the other scroll is made of a non-metal material having elastic deformation and plastic deformation. Two scrolls When the discs are in cooperative operation, the elastic and plastic deformation characteristics of one of the scrolls are used to make the two scrolls contact to become surface contact, and the material is deformed to achieve sealing by squeezing. Deformation and thermal expansion caused by high temperature require complicated compensation in the axial and radial directions. In addition, because the two scrolls are made of two materials, one soft and one hard, Reduced noise and vibration during rotation, more wear-resistant, longer service life, while reducing the requirements for accuracy and form and position tolerances, thereby reducing manufacturing costs.

Claims

Rights request A scroll, comprising a movable scroll and a static scroll composed of a scroll-shaped disk body and a corresponding bottom plate; and characterized by: any one of the movable scroll and the static scroll The disc is made of metal material, and the other scroll is made of non-metal material with elastic deformation and plastic deformation. The characteristics of the material make the two scrolls seal and axially and radially with each other when they cooperate with each other. make up.  The scroll scroll according to claim 1, characterized in that: the movable scroll or the static scroll is made of a metal material, and the static scroll or the movable scroll is made of a non-elastic and plastically deformable non-magnetic scroll. Made of metal materials.  The scroll disk according to claim 1, wherein one of the scroll disks is further provided with a skeleton.  The scroll disk according to claim 3, wherein the skeleton is a perforated sheet. The scroll plate according to claim 4, wherein the perforated sheet is made of metal or plastic.  The scroll disk according to claim 3, wherein the skeleton and the bottom plate have a single structure.  The scroll according to claim 1 or 2, wherein: the non-metallic material is any one selected from engineering plastics, phenolic resins, or epoxy resins.  8. A method for manufacturing a scroll disk, comprising:  Use a thin plate to make a spiral disk body;  Fixed on the metal base plate;  The outer surface of the spiral disc body and the bottom of the groove between the spiral disc body and the metal base plate are injection-molded or coated with an elastic material to form a scroll disc.  The method for manufacturing a scroll disk according to claim 8, wherein the thin plate is provided with a plurality of holes.  10. The method of manufacturing a scroll disk according to claim 8, wherein the thin plate is provided with a plurality of holes. 11. The method for manufacturing a scroll according to claim 8, wherein the elastic material is polytetrafluoroethylene, polyurethane or synthetic rubber. 12. A method for manufacturing a scroll, characterized in that it comprises the following steps: coating an elastic material on a thin plate;  And then made into a vortex disk body;  It is then fixed on a metal base plate to form a scroll.  13. The method for manufacturing a scroll disk according to claim 12, wherein the thin plate is provided with a plurality of holes.  14. The method for manufacturing a scroll according to claim 12, wherein the thin plate is metal or plastic.  15. The method for manufacturing a scroll according to claim 12, wherein the elastic material is polytetrafluoroethylene, polyurethane or synthetic rubber.  16. A method for manufacturing a scroll disk, comprising:  On the metal base plate, a spiral-shaped disc body skeleton is formed by injection molding. Then, an elastic material is injected or coated on the skeleton and the metal base plate.  17. The method for manufacturing a scroll disk according to claim 16, wherein: the metal bottom plate and the scroll disk frame are formed by an integral molding method.  18. The method for manufacturing a scroll according to claim 16, wherein the elastic material is polytetrafluoroethylene, polyurethane or synthetic rubber.  19. A manufacturing method of a scroll, characterized in that: on a metal base plate, an elastic material is used for molding to form a scroll.  20. The method for manufacturing a scroll according to claim 19, wherein the elastic material is polytetrafluoroethylene, polyurethane or synthetic rubber.