WO2017041576A1 - Vertical oil separator inner drum, vertical oil separator and arrangement method - Google Patents

Abstract

A vertical oil separator inner drum, the inner drum (1) comprising a hollow drum-shaped drum wall (11), the drum wall (11) diameter at least partially gradually increasing from a top portion to a bottom portion thereof. The vertical oil separator inner drum having such an inclined structure ensures that oil droplets fall more smoothly and rapidly, and has a wide range of application. Further, the distance between the outer wall and cover inner wall of the vertical oil separator inner drum gradually changes, causing the sectional area of a fluid flow to change, controlling the overall flow speed of the fluid, and thereby further improving oil separator efficiency while avoiding an increase in pressure loss. Further disclosed is a vertical oil separator comprising the vertical oil separator inner drum and a method of arranging the vertical oil separator.

Description

Vertical oil separator inner cylinder, vertical oil separator and arrangement

Related application

The present application claims priority from Chinese Patent Application No. 201510577417.9, entitled "Vertical Oil Separator Inner Tube, Vertical Oil Separator and Arrangement", which is hereby incorporated by reference. The full text is introduced as a reference.

Technical field

The present invention relates to the field of oil separators, and more particularly to a vertical oil separator inner cylinder, a vertical oil separator to which the vertical oil separator inner cylinder is mounted, and an arrangement of the vertical oil separator.

Background technique

In operation of the refrigeration unit, the oil separator is used to separate the lubricating oil from the refrigerant vapor discharged from the compressor. The lubricating oil is in the form of small oil droplets or oil mist in the exhaust gas.

The structure of the conventional oil separator is as shown in Fig. 1, and the inner cylinder 1 provided in the casing 2 has a straight cylindrical shape. The main defects include: 1. The fluid velocity is slow, which leads to small inertia of the fluid; 2. The oil droplets fall poorly.

Summary of the invention

It is an object of the present invention to provide a vertical oil separator inner cylinder that ensures a smoother and faster drop of oil droplets.

Another object of the present invention is to provide a vertical oil separator capable of controlling the overall flow velocity of a fluid.

It is yet another object of the present invention to provide an arrangement of a vertical oil separator that maintains a stable flow rate of fluid within the housing.

To this end, in one aspect, the present invention employs the following technical solutions:

A vertical oil separator inner cylinder comprising a hollow cylindrical tubular wall whose diameter gradually increases from top to bottom.

In particular, the inner barrel includes a barrel wall in the shape of a truncated cone that extends upwardly and inwardly at the top end edge of the barrel wall to form a top flow guiding device.

In particular, an air vent is uniformly formed at the bottom edge of the wall of the cylinder.

Further, the height of the air outlet is h, and the overall height of the inner cylinder is H, 0.1H≤h≤0.5H.

Further, the height of the air outlet is h, and the overall height of the inner cylinder is H, wherein h=0.3H.

In particular, the sum of the areas of all the air outlet holes is S _C , and the total area at the position where the air outlet holes are formed in the cylinder wall is S _K , 0.2 S _K ≤ S _C ≤ 0.8 S _K .

Further, the sum of the areas of all the air outlet holes is S _C , and the total area at the position where the air outlet holes are opened in the cylinder wall is S _K , where S _C =0.6 S _K .

In particular, the barrel wall includes a straight cylindrical wall body that extends upwardly and inwardly at a top end edge of the wall body to form a top flow guiding device that extends downwardly and outwardly at a bottom end edge of the wall body A bottom flow guiding device is formed.

Further, the outer wall of the top flow guiding device is a convex curved surface.

In another aspect, the invention employs the following technical solutions:

A vertical oil separator includes a housing in which the inner cylinder described above is disposed.

In particular, the bottom end edge of the inner cylinder is fixedly attached to the inner wall of the casing.

In particular, the maximum cross-sectional area between the outer wall of the inner cylinder and the inner wall of the casing is S _W , and the maximum cross-sectional area in the inner cylinder is S _N , 0.5S _N ≤ S _W ≤ _{S N} .

In a further aspect, the invention adopts the following technical solutions:

An arrangement of the above-mentioned vertical oil separator, wherein the inner cylinder is eccentrically disposed with respect to the casing; when the entering fluid velocity is greater than or equal to a set value, the axial line of the inner cylinder is opposite to the casing The axis of the shaft is in a direction away from the fluid inlet; when the incoming fluid velocity is less than a set value, the axis of the inner cylinder is in a direction close to the fluid inlet with respect to the axis of the housing.

The inner wall of the inner cylinder of the vertical oil separator of the invention gradually increases in diameter from the top to the bottom, and the inclined structure of the cylinder wall ensures that the oil droplets fall more smoothly and quickly, and the application range is wide.

The inner cylinder of the vertical oil separator of the present invention is provided with the inner cylinder, and the inclined cylinder wall gradually changes the distance between the outer wall of the inner cylinder and the inner wall of the casing, which in turn causes a change in the cross-sectional area of the fluid flow, and controls the overall flow of the fluid. The speed further improves the efficiency of the oil separator without ensuring that the pressure loss is not increased.

In the arrangement of the vertical oil separator of the present invention, the inner cylinder is eccentrically disposed with respect to the casing, and the fluid passage formed by the coaxial arrangement of the existing inner cylinder and the casing is changed into a volute passage, and the speed of the fluid entering the casing is not It will rise sharply and avoid the phenomenon of scouring the wall surface; after a period of motion, the fluid will increase the flow rate due to the reduction of the cross-sectional area of the flow channel, maintaining inertia and good deoiling effect.

DRAWINGS

1 is a schematic structural view of a conventional vertical oil separator;

2 is a schematic structural view of an inner cylinder of a vertical oil separator according to a preferred embodiment of the present invention;

Figure 3 is a front elevational view of the inner cylinder of the vertical oil separator according to a preferred embodiment of the present invention;

4 is a top plan view of a vertical oil separator inner cylinder according to a preferred embodiment of the present invention;

Figure 5 is a front elevational view of a vertical oil separator inner cylinder according to a preferred embodiment 2 of the present invention;

Figure 6 is a top plan view of a vertical oil separator inner cylinder according to a preferred embodiment 2 of the present invention;

Figure 7 is a front elevational view of a vertical oil separator inner cylinder according to a preferred embodiment 3 of the present invention;

Figure 8 is a top plan view of a vertical oil separator inner cylinder according to a preferred embodiment 3 of the present invention;

Figure 9 is a front elevational view of a vertical oil separator inner cylinder according to a preferred embodiment 4 of the present invention;

Figure 10 is a schematic structural view of a vertical oil separator provided in a preferred embodiment 5 of the present invention;

Figure 11 is a right side view of the vertical oil separator of Figure 10;

Figure 12 is a schematic view showing the arrangement of a vertical oil separator provided in a preferred embodiment of the invention.

The figure is marked as:

1, inner cylinder; 2, housing; 3, inlet pipe; 11, cylinder wall; 12, top deflector; 13, air outlet; 14, wall body; 15, bottom deflector.

detailed description

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Preferred embodiment 1:

The preferred embodiment discloses a vertical oil separator inner cylinder. As shown in FIGS. 2 to 4, the inner cylinder 1 includes a hollow cylindrical tubular wall 11 whose diameter gradually increases from the top to the bottom. An air outlet 13 is uniformly formed at the bottom edge of the cylinder wall 11. The vent holes 13 are evenly distributed, and the number is preferably from 3 to 20, preferably eight.

If the opening area is too high, the separation efficiency of the inner cylinder will be lowered, and if the opening is too low, the inner cylinder pressure drop will be increased, so the height of the opening area needs to be designed according to the use condition. Preferably, the height of the air outlet 13 is h, the overall height of the inner cylinder 1 is H, 0.1H ≤ h ≤ 0.5H; more preferably, h = 0.3H.

The area of the vent 13 also has an effect on the use of the oil separator. Specifically, if the area of the air outlet 13 is too small, the pressure loss is too large, and if the area is too large, the oil returning effect is deteriorated. Preferably, the sum of the areas of all the air outlets 13 is S _C , and the total area at the position where the air holes 13 are formed in the cylinder wall 11 is S _K , 0.2 S _K ≤ S _C ≤ 0.8 S _K . More preferably, S _C = 0.6 S _K .

Preferred embodiment two:

The preferred embodiment discloses a vertical oil separator inner cylinder, the structure of which is substantially the same as that of the preferred embodiment 1. The difference is that, as shown in FIGS. 5 and 6, the inner cylinder 1 includes a cylindrical wall 11 in the shape of a truncated cone, and the top flow guiding device 12 is formed upwardly and inwardly at the top end edge of the cylindrical wall 11.

The top deflector 12 has a larger slope than the wall 11 to ensure a smoother drop of oil droplets. An air outlet hole (not shown) is uniformly formed at the bottom edge of the cylinder wall 11. The shape and area of the air outlet hole are equivalent to the first embodiment.

Preferred embodiment three:

The preferred embodiment discloses a vertical oil separator inner cylinder. As shown in Figures 7 and 8, the barrel wall 11 includes a straight cylindrical wall body 14 that extends upwardly and inwardly at the top end edge of the wall body 14 to form a top deflector 12 at the bottom end edge of the wall body 14. The bottom and outer extensions form a bottom flow guiding device 15. The umbrella-shaped bottom flow guiding device 15 can be welded to the area in contact with the housing to enhance the strength of the inner cylinder.

Preferred embodiment four:

The preferred embodiment discloses a vertical oil separator inner cylinder which is substantially identical in construction to the preferred embodiment 3. The difference is that, as shown in FIG. 9, the outer wall of the top flow guiding device 12 is a convex curved surface, and the oil droplets fall more smoothly and quickly.

Preferred Embodiment 5:

The preferred embodiment discloses a vertical oil separator. As shown in Figures 10 and 11, the vertical oil separator includes a housing 2 in which an inner cylinder 1 as described in any one of preferred embodiments one to four is disposed. After adopting the structure of the inner cylinder 1, the purpose of increasing the fluid velocity is achieved by gradually reducing the cross-sectional area of the fluid in the height direction, and the oil droplets are separated by maintaining the fluid velocity and increasing the inertia.

In order to enhance the stability of the inner cylinder, the bottom end edge of the inner cylinder 1 is fixedly attached to the inner wall of the casing 2. The manner of fixing the connection includes, but is not limited to, welding, which can satisfy the stable connection between the inner cylinder 1 and the inner wall of the casing 2.

When the distance between the outer wall of the inner cylinder 1 and the inner wall of the casing 2 varies greatly from the top to the bottom, the pressure loss is large. The maximum cross-sectional area between the inner wall and the outer wall of the inner cylindrical housing 1 is S _W (this is a maximum cross-sectional area S _W close to the cross-sectional area between the inner wall and the outer wall of the inner tube 1 at the housing cover), the inner The maximum cross-sectional area in the cylinder 1 is S _N (the maximum value is equal to the cross-sectional area of the inner wall of the casing 2), and the preferred numerical range is 0.5 S _N ≤ _{S W} ≤ _{S N} to avoid excessive pressure loss. That is, the upper portion of the inner cylinder 1 needs to be clearly gathered. The most extreme case is that the upper port of the inner cylinder 1 has a diameter of almost zero, and the inner cylinder 1 has a conical shape.

The arrangement of the vertical oil separator is not limited, and the preferred arrangement is that the inner cylinder 1 is eccentrically disposed with respect to the casing 2. As shown in FIG. 12, the shaded area in the figure is the area where the axis line of the inner cylinder 1 is located, and the center point of the cross mark is the axis of the casing 2. The change in arrangement allows the oil separator to be used in a wider range, and the flow velocity of the fluid in the housing is kept constant, thereby improving the oil removal efficiency of the oil separator to the rotating fluid.

Specifically, the fluid enters the area between the inner cylinder 1 and the casing 2 from the inlet pipe 3. When the fluid velocity is greater than or equal to a set value (the specific value may be determined according to actual working conditions), the axial line of the inner cylinder 1 is relatively The axis of the housing 2 is in a direction away from the fluid inlet, ie in zone A or zone C. Changing the fluid flow path of the existing structure (the inner cylinder 1 and the casing 2 are coaxial) It becomes a "snail type", and the velocity does not rise sharply after the fluid enters the casing 2, thereby avoiding the phenomenon that the fluid washes the wall surface. After a period of exercise, the fluid will increase the flow rate due to the reduction of the cross-sectional area of the flow passage, and maintain the influence of inertia on the deoiling.

When the incoming fluid velocity is less than the set value, the axial center line of the inner cylinder 1 is in a direction close to the fluid inlet with respect to the axial center of the casing 2, that is, in the B zone or the D zone. After entering the casing 2 from the inlet pipe 3, the passage between the inner cylinder 1 and the casing 2 becomes narrower, the speed of the fluid is increased, the effect of inertia on the deoiling is enhanced, and the deoiling effect is better.

Note that the above are only the preferred embodiments of the present invention and the technical principles applied thereto. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various modifications, changes and substitutions may be made without departing from the scope of the invention. Therefore, the present invention has been described in detail by the above embodiments, but the present invention is not limited to the above embodiments, and other equivalent embodiments may be included without departing from the inventive concept. The scope is determined by the scope of the appended claims.

Claims (13)

A vertical oil separator inner cylinder, characterized in that the inner cylinder (1) comprises a hollow cylindrical wall (11), the cylinder wall (11) is at least partially enlarged from the top to the bottom diameter . A vertical oil separator inner cylinder according to claim 1, wherein said inner cylinder (1) comprises a cylindrical wall (11) in the shape of a truncated cone at the top end edge of said cylinder wall (11) The top flow guiding device (12) is formed to extend upward and inward. The vertical oil separator inner cylinder according to claim 1 or 2, characterized in that an air outlet (13) is uniformly formed at a bottom edge of the cylinder wall (11). The vertical oil separator inner cylinder according to claim 3, wherein the height of the air outlet (13) is h, and the overall height of the inner cylinder (1) is H, 0.1H≤h≤0.5 H. The vertical oil separator inner cylinder according to claim 3, wherein the height of the air outlet (13) is h, and the overall height of the inner cylinder (1) is H, wherein h = 0.3H . The vertical oil separator inner cylinder according to claim 3, wherein a sum of areas of all of the air outlet holes (13) is S _C , and the air outlet holes are opened in the cylinder wall (11) the total area at a position) is _{S K, 0.2S K ≤S C ≤0.8S} K. The vertical oil separator inner cylinder according to claim 3, wherein a sum of areas of all of the air outlet holes (13) is S _C , and the air outlet holes are opened in the cylinder wall (11) The total area at the location is S _K , where S _C =0.6S _K . A vertical oil separator inner cylinder according to claim 1, wherein said cylinder wall (11) comprises a straight cylindrical wall body (14) at an upper end edge of said wall body (14) and Extending inwardly to form a top flow guiding device (12), a bottom flow guiding device (15) is formed downwardly and outwardly at a bottom end edge of the wall body (14). The vertical oil separator inner cylinder according to claim 8, wherein the outer wall of the top flow guiding device (12) is a convex curved surface. A vertical oil separator comprising a casing (2), characterized in that the casing (2) is provided with an inner cylinder (1) according to any one of claims 1 to 7. A vertical oil separator according to claim 10, characterized in that the bottom end edge of the inner cylinder (1) is fixedly attached to the inner wall of the casing (2). A vertical oil separator according to claim 10 or 11, wherein a maximum cross-sectional area between the outer wall of the inner cylinder (1) and the inner wall of the casing (2) is S _W , The maximum cross-sectional area in the inner cylinder (1) is S _N , 0.5S _N ≤S _W ≤S _N . An arrangement of a vertical oil separator according to any one of claims 10 to 12, characterized in that the inner cylinder (1) is eccentrically arranged with respect to the casing (2); when the entering fluid velocity is greater than or equal to When setting a value, the axial line of the inner cylinder (1) is in a direction away from the fluid inlet with respect to the axial line of the casing (2); when the incoming fluid velocity is less than a set value, the inner cylinder The axis of the (1) is in a direction close to the fluid inlet with respect to the axis of the housing (2).

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