Oil separator
By setting a transition part and the unit obliquely clamping the flow stop plate in the lower cover of the oil separator, the problem of the greatest stress on the step plane of the existing oil separator flow stop plate is solved, and the stable fixation of the flow stop plate is achieved, reducing the risk of product breakage and improving the reliability of the system.
Patent Information
- Application Number
- CN202311785984.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-06-24
AI Technical Summary
The current oil separator has the greatest stress at the inner and outer ends of the flow stop plate step plane, which is prone to fracture and poses a risk of product use.
By providing a transition part and the unit obliquely clamping the flow stop plate with the instrument body, the axial component and radial component of the clamping force can be used to realize the basic assembly positioning to ensure that the flow stop plate is fixed and not loose.
It effectively reduces the risk of fatigue and fracture of the product under high pressure, and improves the reliability of the system and use reliability.
Smart Images
Figure CN120194445A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of refrigeration, and particularly relates to an oil separator. Background Art
[0002] An oil separator is usually installed between a compressor and a condenser in a refrigeration system, and is used to separate lubricating oil from the oil-gas mixture compressed by the compressor, so as to reduce the amount of oil entering the system and improve the system efficiency.
[0003] A typical oil separator forms a cavity composed of an upper end cover, a lower end cover and a body. The high-temperature and high-pressure mixed gas compressed by the compressor enters the oil separator from the inlet pipe. Through centrifugal separation inside the cavity, the lubricating oil is converted into a liquid state. After sedimentation, it passes through the baffle plate and is stored at the bottom of the cavity, and can return to the compressor through the oil return pipe. The gaseous refrigerant is blocked by the baffle plate and turns upward, and flows to the condenser through the outlet pipe.
[0004] The baffle plate of this oil separator is placed inside the lower end cover and is fixed by pressing the radial extension step plane of the lower end cover against the end face of the body. Combining the actual use verification of this structure and the force analysis of the model, the stress at the inner and outer end corners of the step plane is the greatest, and fractures will occur at this position, posing a risk in product use. Summary of the Invention
[0005] To solve the above technical problems, the present invention provides an oil separator, which can effectively improve the stress state of the lower cover body through structural optimization and enhance the reliability of product use.
[0006] The present invention provides an oil separator, including a body, an upper cover body, a lower cover body and a baffle plate. The body is in the shape of a cylinder with openings at both ends, and the upper cover body and the lower cover body are respectively fixed at both ends of the body to form an internal cavity. The oil separator further includes an inlet pipe, an outlet pipe and an oil return pipe communicated with the cavity; an installation part is provided at the lower end of the body, and the installation part is formed by inward contraction relative to the outer peripheral surface of the body; the baffle plate includes a baffle body and a flange, the flange is arranged at the outer edge of the baffle body and bends towards the body side, and a through hole is provided on the baffle body; the flange abuts against the outer peripheral surface of the installation part, and the baffle body abuts against the end face of the installation part; the lower cover body includes a cover body, a transition part and an open part, and the oil return pipe is arranged on the cover body; the open part is sleeved outside the flange and the body, the transition part abuts against the baffle plate, the lower cover body and the body clamp the baffle plate, and the clamping direction forms an angle with the extending direction of the body. Compared with the background art, the oil separator provided by this solution clamps the baffle plate obliquely by the transition part of the lower cover body and the body, and realizes basic assembly positioning through the axial component force and radial component force of the clamping force, so that the baffle plate is fixed without loosening, ensuring the welding quality of the subsequent welding process, avoiding fatigue fracture under system high pressure, and providing good technical guarantee for the reliable operation of the system. Brief Description of the Drawings
[0007] Figure 1 Schematic diagram of the oil separator described in Embodiment 1;
[0008] Figure 2 is Figure 1 Schematic diagram of the overall structure of the oil separator shown in
[0009] Figure 3 is Figure 1 Schematic diagram of the body shown in
[0010] Figure 4 is Figure 1 Schematic diagram of the baffle shown in
[0011] Figure 5 is Figure 1 Schematic diagram of the structure of the lower cover shown in
[0012] Figure 6 Schematic diagram of the simulation result of the force analysis of the lower cover of the oil separator described in Embodiment 1;
[0013] Figure 7 Schematic diagram of the oil separator described in Embodiment 2;
[0014] Figure 8 is Figure 7 Schematic diagram of the structure of the lower cover shown in
[0015] Figure 9 Schematic diagram of the structure of the baffle described in Embodiment 3;
[0016] Figure 10 Schematic diagram of the structure of the baffle described in Embodiment 4;
[0017] Figure 11 Schematic diagram of the structure of the baffle described in Embodiment 5.
[0018] In the figure:
[0019] Oil separator 100, body 1, installation part 11, upper cover 2, lower cover 3, cover body 31, transition part 32, open part 33, inlet pipe 4, outlet pipe 5, baffle 6, baffle body 61, through hole 611, flanging 62, return oil pipe 7;
[0020] Oil separator 100a, transition part 32a;
[0021] Baffle 6b, through hole 611b;
[0022] Baffle 6c, baffle body 61c, through hole 611c;
[0023] Baffle 6d, flanging 62d. Detailed implementation manners
[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] Embodiment 1:
[0026] Without loss of generality, in this embodiment, the oil separator shown in the figure is used as the description subject, and the internal structure and cooperation relationship will be described in detail. Please also refer to Figure 1 and Figure 2 , where Figure 1 is a schematic diagram of the oil separator described in Embodiment 1, Figure 2 is Figure 1 a schematic diagram of the overall composition of the oil separator shown in
[0027] The oil separator 100 includes a body 1, an upper cover 2 and a lower cover 3. The body 1 is in the shape of a cylinder with openings at both ends. The upper cover 2 and the lower cover 3 are respectively fixed to the openings at both ends of the cylindrical body 1 to form an internal cavity.
[0028] As Figure 1 shown, the inlet pipe 4 is fixedly arranged on the body 1 so that the high-temperature and high-pressure oil-gas mixture flowing out of the compressor side can enter the cavity of the oil separator. Here, the inlet pipe 4 is fixedly arranged on the side wall of the body 1. The gaseous lubricating oil is converted into liquid through the centrifugal separation inside the cavity, and after sedimentation, it is stored at the bottom of the cavity through the baffle plate. It should be understood that the specific functional structure of oil-gas separation can be realized by using the existing technology, so it will not be elaborated herein.
[0029] In other specific implementations, the inlet pipe can also be fixedly arranged on the upper cover 2 (not shown in the figure), and the oil-gas mixture can also be reliably introduced into the cavity through the inlet pipe.
[0030] In this embodiment, the outlet pipe 5 is fixedly arranged on the upper cover 2. As shown in Figure 2 , under the blocking action of the baffle plate 6, the gaseous refrigerant rises and can flow out through the outlet pipe 5 and enter the condenser; the oil return pipe 7 is fixedly arranged on the lower cover 3, and the lubricating oil stored at the bottom of the cavity can flow out through the oil return pipe 7 and return to the compressor.
[0031] Among them, an installation part 11 is arranged at the lower end of the body 1. The installation part 11 is formed by inward contraction relative to the outer peripheral surface of the body 1 and is used for assembling the baffle plate 6. Please refer to Figure 3 , which is a schematic diagram of the body shown in Figure 1 . The outer diameter of the body 1 has a first dimension D1, and the outer diameter of the installation part 11 has a second dimension D2, and the second dimension D2 is smaller than the first dimension D1.
[0032] Among them, the baffle 6 includes a baffle body 61 and a flange 62, and the flange 62 is continuously arranged along the outer edge of the baffle body 61. Please refer to Figure 4 , and this figure is Figure 1 a schematic diagram of the baffle shown in. The inner diameter of the flange 62 has a third dimension D3, and the outer diameter of the flange 62 has a fourth dimension D4.
[0033] The flange 62 bends and extends from the baffle body 61 toward the side of the device body 1, and a through hole 611 for lubricating oil sedimentation is opened in the middle of the baffle body 61. Combining Figure 2 as shown, the flange 62 of the baffle 6 abuts against the outer peripheral surface of the mounting portion 11 of the device body 1, and the baffle body 61 can abut against the end surface of the mounting portion 11. The axial and radial components of the clamping force are used to achieve basic assembly positioning to ensure the welding quality of the subsequent welding process.
[0034] A clearance fit can be adopted between the flange 62 and the mounting portion 11 to facilitate the assembly operation; at the same time, the height dimension L2 of the flange 62 is smaller than the height dimension L1 of the mounting portion 11, which can avoid over-positioning. In this way, the baffle body 61 and the end surface of the mounting portion 11 can reliably abut against each other.
[0035] In a specific implementation, the mounting portion 11 can be formed by different processing techniques, such as but not limited to turning.
[0036] In order to further improve the assembly processability of the lower cover body 3, the outer surface of the flange 62 is substantially flush with the outer surface of the device body 1. In other words, the fourth dimension D4 of the flange 62 can be the same as the first dimension D1 of the device body 1, so that when the lower cover body 3 is assembled, the flange 62 and the outside of the device body 1 are sleeved, and at the same time, the outer surfaces of the flange 62 and the device body 1 are fitted and matched.
[0037] Among them, the lower cover body 3 includes a cover body 31, a transition portion 32, and an open portion 33. Please refer to Figure 5 , and this figure is Figure 1 a structural schematic diagram of the lower cover body shown in. The inner diameter of the open portion 33 of the lower cover body 3 has a fifth dimension D5, and the inner diameter of the open portion 33 has a sixth dimension D6.
[0038] The transition portion 32 is connected between the cover body 31 and the open portion 33. The transition portion 32 is an inclined surface that is inclined with respect to the cover body 31 and the open portion 33, and both the transition portion 32 and the cover body 31 and the open portion 33 are connected by arc transitions to avoid stress concentration. Combining Figure 2As shown, the open part 33 of the lower cover body 3 is sleeved outside the flanging 62 and the body 1, and its transition part 32 abuts against the joint of the baffle body 61 and the flanging 62. The transition part 32 of the lower cover body 3 and the mounting part 11 of the body 1 can clamp the baffle 6, and the clamping direction (the direction marked by X in the figure) is set at an angle with the extending direction of the body 1 (the direction where the center line of the body 1 is located), so as to realize the basic assembly positioning, make the baffle fixed without loosening, ensure the welding quality of the subsequent welding process, and avoid fatigue fracture under the high pressure of the system.
[0039] Further, there are gaps between the open part 33 of the lower cover body 3 and the flanging 62 of the baffle 6 and the outer cover body 31 of the body 1. That is to say, the fifth dimension D5 of the open part 33 can be larger than the fourth dimension D4 of the flanging 62 and the first dimension D1 of the body 1 to facilitate the assembly operation.
[0040] For the lower cover body 3 described in this embodiment, the simulation results formed by the force analysis through the model are as Figure 6 shown. Based on the design of the transition part 32 of the lower cover body 3 arranged as an inclined plane, the point with the maximum force is only at the fillet R where it is connected to the cover body 31.
[0041] In addition, taking the lower cover body that presses against the baffle through the radially extending stepped plane described in the background art as a comparative example, and performing force analysis under the same pressure, the force at the point with the maximum force in the solution of the present invention is about 55% of that of the comparative example solution. The overall force state is good, and the use risk of the product can be effectively reduced.
[0042] In the foregoing embodiment, the transition part 32 of the lower cover body 3 used to clamp the baffle 6 together with the body is an inclined plane arranged obliquely to realize clamping in a direction at an angle with the extending direction of the body. In other specific implementations, the transition part of the lower cover body 3 can also adopt an arc-shaped structure.
[0043] Embodiment 2:
[0044] Please refer to Figure 7 and Figure 8 , wherein, Figure 7 is a schematic diagram of the oil separator described in Embodiment 2, Figure 8 is Figure 7 a schematic structural diagram of the lower cover body shown in
[0045] The main difference between this embodiment and Embodiment 1 is that the structure of the lower cover body 3a of the oil separator 100a is different. As Figure 8As shown, the lower cover 3 of the lower cover body 3a includes a cover body 31, a transition part 32a, and an open part 33. Among them, the transition part 32a connected between the cover body 31 and the open part 33 is a curved surface, and both the transition part 32a and the cover body 31 and the open part 33 are connected by arc transitions.
[0046] The open part 33 of the lower cover body 3a is sleeved on the flanging 62 of the baffle 6 and the outside of the device body 1, and its transition part 32a abuts against the joint of the baffle body 61 and the flanging 62. Similarly, the transition part 32a of the lower cover body 3a and the mounting part 11 of the device body 1 can clamp the baffle 6, and clamp the baffle 6 along the direction indicated by the X mark in the figure, that is, set at an angle with the extension direction of the device body 1, so as to realize the basic assembly positioning and make the baffle fixed without loosening.
[0047] The other functional components and connection relationships are the same as those in the first embodiment, and will not be elaborated here.
[0048] In addition, for the specific structural implementation of the baffle, it can be determined according to different product design requirements.
[0049] Please refer to Figure 9 , this figure is a schematic structural diagram of the baffle described in the third embodiment. In order to clearly show the differences and connections between this implementation scheme and the oil separator described in the first embodiment, the components or structures with the same functions are schematically marked with the same marks in the figure.
[0050] As Figure 9 shown, the baffle 6b includes a baffle body 61 and a flanging 62, and the flanging 62 is continuously arranged along the outer edge of the baffle body 61. In this implementation scheme, a plurality of through holes 611b are opened on the baffle body 61 and are spaced within the through area of the baffle body 61. Here, the "through area" refers to the area of the baffle body 61 that can pass liquid lubricating oil, so that the liquid lubricating oil can smoothly pass through the baffle body 61 and be stored at the bottom of the cavity.
[0051] Please refer to Figure 10 , this figure is a schematic structural diagram of the baffle described in the fourth embodiment. In order to clearly show the differences and connections between this implementation scheme and the oil separator described in the first embodiment, the components or structures with the same functions are schematically marked with the same marks in the figure.
[0052] As Figure 10 shown, the baffle 6c includes a baffle body 61c and a flanging 62, and the flanging 62 is continuously arranged along the outer edge of the baffle body 61c. In this implementation scheme, the baffle body 61c is convex downward, such as but not limited to the funnel shape shown in the figure, and the through hole 611c is located at the bottom of the baffle body 61c for realizing the sedimentation of lubricating oil and avoiding the retention of liquid lubricating oil above the baffle.
[0053] Please refer to Figure 11 , which is a schematic structural diagram of the baffle described in Embodiment 5. To clearly show the differences and connections between this implementation and the oil separator described in Embodiment 1, components or structures with the same functions are schematically indicated by the same reference numerals in the figure.
[0054] As Figure 11 shown, the baffle 6d includes a baffle body 61 and a flange 62d. The through-hole 611 is located in the middle of the baffle body 61. In this implementation, the flange 62d is composed of three rectangular sheets, which are arranged at intervals along the outer edge of the baffle body 61. In specific implementation, the number of the flanges 62d can be determined as needed, rather than being limited to the three shown in the figure. This is not limited in the embodiments of this application.
[0055] After assembly, the flange 62d is also sleeved on the mounting portion at the bottom of the device body, and the baffle 6d is clamped by the transition portion of the lower cover body and the mounting portion 11 of the device body (not shown in the figure) to achieve basic assembly positioning.
[0056] In other specific implementations, the flange 62d can be a flanged sheet of other shapes, rather than being limited to the rectangular sheet shown in the figure. This is not limited in the embodiments of this application.
[0057] It should be noted that the orientation terms "upper", "lower", "axial" and "radial" used in this article are defined based on the device body in the use state. In addition, for components without an axis line connection, the terms "axial" and "radial" are also used for structural description to clearly express the specific mating relationship. It should be understood that the use of the above orientation terms does not constitute a limitation to the technical essence.
[0058] In addition, the ordinal numbers "first" and "second" used in this article are only used to describe components or structures with the same functions in the technical solution. It can be understood that the use of the above ordinal numbers "first" and "second" does not constitute a limitation to the understanding of the technical solution claimed in this application.
[0059] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. An oil separator, characterized in that, It includes a body, an upper cover, a lower cover and a baffle. The body is in the shape of a cylinder with openings at both ends. The upper cover and the lower cover are respectively fixed at both ends of the body to form an internal cavity. The oil separator further includes an inlet pipe, an outlet pipe and a return pipe communicated with the cavity; An installation part is arranged at the lower end of the body and is formed by inward contraction relative to the outer peripheral surface of the body. The baffle includes a baffle body and a flanging. The flanging is arranged at the outer edge of the baffle body and is bent towards the side of the body. A through hole is formed in the baffle body. The flanging abuts against the outer peripheral surface of the installation part, and the baffle body abuts against the end surface of the installation part; The lower cover includes a cover body, a transition part and an open part. The return pipe is arranged on the cover body. The open part is sleeved outside the flanging and the body. The transition part abuts against the baffle. The lower cover and the body clamp the baffle, and the clamping direction is set at an acute angle with the extending direction of the body.
2. The oil separator according to claim 1, characterized in that Arc transition connections are respectively arranged between the transition part and the cover body and between the transition part and the open part.
3. The oil separator according to claim 2, characterized in that, The transition part is an inclined plane.
4. The oil separator according to claim 2, characterized in that, The transition part is an inclined curved surface.
5. The oil separator according to any one of claims 1 to 4, characterized in that, The flanging and the installation part are in clearance fit.
6. The oil separator according to claim 5, wherein, The flanging is flush with the outer peripheral surface of the body.
7. The oil separator according to claim 5, characterized in that, The height dimension of the flanging is smaller than the height dimension of the installation part.
8. The oil separator according to claim 1, characterized in that, The flanging is continuously arranged along the outer edge of the baffle body.
9. The oil separator according to claim 1, characterized in that, There are multiple flangings, and the multiple flangings are arranged at intervals along the outer edge of the baffle body.
10. The oil separator according to claim 8 or 9, characterized in that, The baffle body is in a flat plate shape or in a downward convex shape.
11. The oil separator according to claim 10, wherein, The through hole is formed in the middle of the baffle body.
12. The oil separator according to claim 10, characterized in that, A plurality of through holes are formed in the baffle body, and the plurality of through holes are arranged at intervals within the through plane of the baffle body.