Special bearing for vacuum pump

Abstract

The utility model relates to the technical field of vacuum pump bearings, and discloses a special bearing for a vacuum pump, which comprises an inner ring, an outer ring, two sealing gaskets, a plurality of ball bodies and a ball retainer, the plurality of ball bodies are respectively arranged between the inner ring and the outer ring, and the ball retainer is arranged on the outer sides of the plurality of ball bodies. The two sealing gaskets are arranged between the inner ring and the outer ring at the upper end and the lower end of the ball retainer correspondingly, cavities are formed in the inner ring and the outer ring correspondingly, and a plurality of second threaded holes are formed in the inner side walls of the two cavities correspondingly. And the plurality of second threaded holes respectively penetrate through the inner side walls of the two cavities and are communicated to the side wall, close to the outer side, of the inner ring and the side wall, close to the inner side, of the outer ring. According to the utility model, the phase-change material is added into the two cavities through the four first threaded holes, and heat is absorbed and stored through the phase-change material, so that the working temperature of the bearing can be effectively controlled and kept in a safe range.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump bearing technology, and in particular to a special bearing for vacuum pumps. Background Technology

[0002] A vacuum pump is a device used to generate, improve, and maintain a vacuum. It is widely used in various fields such as industry, scientific research, and medicine. A vacuum pump uses rotating blades to draw gas in from the inlet and compress it before discharging it. Vacuum pump bearings are bearings specifically designed for vacuum pumps and are characterized by high reliability, high precision, and long service life.

[0003] There are still some problems in the use of vacuum pump bearings. Existing vacuum pump bearings generate a lot of heat when running at high speed and high load, which causes the bearing temperature to rise. Excessive temperature will accelerate the degradation of lubricant, increase friction and wear, and even lead to bearing failure. In addition, traditional bearings may experience local overheating during operation, resulting in uneven temperature distribution, which further aggravates wear and fatigue. Therefore, those skilled in the art have provided a vacuum pump bearing to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a special bearing for vacuum pumps. Phase change material is added into the two cavities through four first threaded holes. By absorbing and storing heat through the phase change material, the operating temperature of the bearing can be effectively controlled and kept within a safe range. The uniform distribution of the phase change material and the arrangement of the heat-conducting fins can promote rapid heat conduction and uniform distribution, avoid local overheating, and improve the overall temperature uniformity of the bearing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a special bearing for vacuum pumps, comprising an inner ring, an outer ring, two sealing gaskets, multiple ball bodies and a ball cage, wherein the multiple ball bodies are respectively disposed between the inner ring and the outer ring, the ball cage is disposed on the outer side of the multiple ball bodies, the two sealing gaskets are respectively disposed between the inner ring and the outer ring at the upper and lower ends of the ball cage, both the inner ring and the outer ring have cavities inside, and both cavities have multiple second threaded holes on their inner sidewalls, the multiple second threaded holes respectively penetrate the inner sidewalls of the two cavities and lead to the outer sidewall of the inner ring and the inner sidewall of the outer ring, each of the multiple second threaded holes has a sealing and heat-conducting structure inside, and both cavities have a phase change material inside;

[0006] The sealed thermally conductive structure includes a thermally conductive screw plug, which is threaded into the inside of a second threaded hole. A hard thermally conductive silicone is provided between the thermally conductive screw plug and the ball body inside the second threaded hole. A thermally conductive module is provided at the other end of the thermally conductive screw plug.

[0007] With the above technical solution, during use, heat is conducted to the interior of the two cavities through multiple hard thermally conductive silicone and thermally conductive screw plugs. By absorbing and storing heat through phase change material, the operating temperature of the bearing can be effectively controlled and kept within a safe range.

[0008] Furthermore, the heat-conducting module includes a heat-conducting rod, which is fixedly connected to the end of the heat-conducting screw plug, and multiple heat-conducting fins are provided on the outer side wall of the heat-conducting rod;

[0009] The above technical solution improves the efficiency of heat conduction by increasing the contact area between multiple heat-conducting fins and two phase change materials.

[0010] Furthermore, a first threaded hole is provided on one side of the upper inner wall of the two cavities and on the other side of the lower inner wall of the two cavities, and a threaded plug is provided inside each of the four first threaded holes;

[0011] With the above technical solution, when the phase change material needs to be replaced after long-term use, the four threaded plugs can be removed. When the phase change material flows out of the two lower first threaded holes, the phase change material enters the two upper ones. Then, the two lower threaded plugs are threaded into the two lower first threaded holes, and the phase change material is injected through the two upper first threaded holes for replacement. This facilitates the discharge of the phase change material for replacement.

[0012] Furthermore, an arc surface is formed on the contact surface between the rigid thermally conductive silicone and the ball body;

[0013] The above technical solution ensures that multiple ball bearings do not wobble when passing through hard thermally conductive silicone.

[0014] Furthermore, both phase change materials are made of fatty acid salts;

[0015] The above technical solutions provide fatty acid salts with moderate phase transition temperature, high latent heat of phase transition, and good chemical stability, making them suitable for long-term use.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, when the special bearing for vacuum pumps is used, heat is conducted to the interior of the two cavities through multiple hard thermally conductive silicone and thermally conductive screw plugs. By absorbing and storing heat through phase change material, the working temperature of the bearing can be effectively controlled and kept within a safe range. The uniform distribution of phase change material and the setting of thermally conductive fins can promote the rapid conduction and uniform distribution of heat, avoid local overheating, and improve the overall temperature uniformity of the bearing.

[0018] 2. In this utility model, when the phase change material needs to be replaced after long-term use, the four threaded plugs can be removed. When the phase change material flows out of the two lower first threaded holes, the phase change material enters the two upper ones. Then, the two lower threaded plugs are threaded into the two lower first threaded holes, and the phase change material is injected through the two upper first threaded holes for replacement, which facilitates the discharge of the phase change material for replacement.

[0019] 3. In this utility model, the efficiency of heat conduction is improved by increasing the contact area between multiple heat-conducting fins and two phase change materials. Attached Figure Description

[0020] Figure 1 This is a perspective view of a special bearing for a vacuum pump proposed in this utility model;

[0021] Figure 2 This is a three-dimensional sectional view of a special bearing for vacuum pumps proposed in this utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a three-dimensional sectional view of a heat-conducting module for a vacuum pump bearing proposed in this utility model.

[0024] Legend:

[0025] 1. Inner ring; 2. Outer ring; 3. Sealing gasket; 4. Ball body; 5. Cavity; 6. Ball cage; 7. First threaded hole; 8. Threaded plug; 9. Second threaded hole; 10. Sealing and heat-conducting structure; 1001. Hard thermally conductive silicone; 1002. Thermally conductive screw plug; 1003. Thermally conductive module; 10031. Thermally conductive rod; 10032. Thermally conductive fins; 11. Phase change material. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figure 1-4This utility model provides an embodiment of a vacuum pump bearing, comprising an inner ring 1, an outer ring 2, two sealing gaskets 3, multiple ball bodies 4, and a ball retainer 6. The multiple ball bodies 4 are respectively disposed between the inner ring 1 and the outer ring 2, and the ball retainer 6 is disposed on the outer side of the multiple ball bodies 4. The two sealing gaskets 3 are respectively disposed between the inner ring 1 and the outer ring 2 at the upper and lower ends of the ball retainer 6. Both the inner ring 1 and the outer ring 2 have cavities 5 inside. Both cavities 5 have multiple second threaded holes 9 on their inner sidewalls. The multiple second threaded holes 9 pass through the inner sidewalls of the two cavities 5 and lead to the outer sidewall of the inner ring 1 and the inner sidewall of the outer ring 2. Each of the multiple second threaded holes 9 has a sealing and heat-conducting structure 10 inside. Both cavities 5 have a phase change material 11 inside, and the temperature is regulated by the phase change material 11.

[0028] like Figure 1 , 2 As shown in Figure 3, the sealed thermally conductive structure 10 includes a thermally conductive plug 1002, which is threaded into the interior of the second threaded hole 9. A hard thermally conductive silicone 1001 is provided between the thermally conductive plug 1002 and the ball body 4 inside the second threaded hole 9. A thermally conductive module 1003 is provided at the other end of the thermally conductive plug 1002. In use, heat is conducted to the interior of the two cavities 5 through multiple hard thermally conductive silicone 1001 and thermally conductive plug 1002. By absorbing and storing heat through the phase change material, the operating temperature of the bearing can be effectively controlled and kept within a safe range.

[0029] The heat conduction module 1003 includes a heat conduction rod 10031, which is fixedly connected to the end of the heat conduction screw plug 1002. Multiple heat conduction fins 10032 are provided on the outer side wall of the heat conduction rod 10031. The heat conduction efficiency is improved by increasing the contact area between the multiple heat conduction fins 10032 and the two phase change materials 11.

[0030] like Figure 1 , 2 As shown in Figures 3 and 4, a first threaded hole 7 is provided on one side of the upper inner wall of the two cavities 5 and on the other side of the lower inner wall of the two cavities 5. Each of the four first threaded holes 7 is provided with a threaded plug 8. When the phase change material 11 needs to be replaced after long-term use, the four threaded plugs 8 can be removed. When the phase change material 11 flows out of the two lower first threaded holes 7, the phase change material 11 enters the two upper phase change materials 11. Then, the two lower threaded plugs 8 are threaded into the two lower first threaded holes 7, and the phase change material 11 is injected through the two upper first threaded holes 7 for replacement. This facilitates the discharge of the phase change material 11 for replacement.

[0031] The contact surface between the rigid thermally conductive silicone 1001 and the ball body 4 is provided with an arc surface, so that multiple ball bodies 4 will not shake when passing through the rigid thermally conductive silicone 1001. Both phase change materials 11 are made of fatty acid salts. Fatty acid salts have moderate phase change temperature, high latent heat of phase change and good chemical stability, which makes them suitable for long-term use.

[0032] Working principle: During assembly, the thermally conductive plug 1002 is threaded into the inside of multiple second threaded holes 9. Then, the hard thermally conductive silicone 1001 is inserted into the inside of the second threaded holes 9 at the ends of the multiple thermally conductive plugs 1002. The bearing is then assembled. By removing the two upper threaded plugs 8, the phase change material 11 is injected into the two cavities 5 through the two first threaded holes 7. After injection, the two threaded plugs 8 are threaded into the inside of the two first threaded holes 7.

[0033] In use, heat is conducted to the interior of the two cavities 5 through multiple rigid thermally conductive silicone 1001 and thermally conductive screw plugs 1002. The larger contact area between multiple thermally conductive fins 10032 and the two phase change materials 11 improves the efficiency of heat conduction. By absorbing and storing heat through the phase change materials, the operating temperature of the bearing can be effectively controlled and kept within a safe range. The uniform distribution of the phase change materials 11 and the arrangement of the thermally conductive fins 10032 can promote rapid heat conduction and uniform distribution, avoid local overheating, and improve the overall temperature uniformity of the bearing.

[0034] When the bearing temperature drops, the phase change material 11 changes from liquid to solid, releasing the heat stored previously. This heat release process can slow down the rate of temperature drop, thereby maintaining the relative stability of the bearing temperature. Temperature stability helps reduce thermal stress and prevents the bearing material from cracking or deforming due to sudden temperature changes.

[0035] When the phase change material 11 needs to be replaced after long-term use, it can be replaced by removing the four threaded plugs 8. When the phase change material 11 flows out of the two lower first threaded holes 7, air enters the two upper phase change materials 11. Then, the two lower threaded plugs 8 are threaded into the two lower first threaded holes 7, and the phase change material 11 is injected through the two upper first threaded holes 7 for replacement, which facilitates the discharge of the phase change material 11 for replacement.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bearing for a vacuum pump, comprising an inner ring (1), an outer ring (2), two sealing gaskets (3), a plurality of ball bodies (4), and a ball cage (6), wherein the plurality of ball bodies (4) are respectively disposed between the inner ring (1) and the outer ring (2), the ball cage (6) is disposed on the outer side of the plurality of ball bodies (4), and the two sealing gaskets (3) are respectively disposed between the inner ring (1) and the outer ring (2) at the upper and lower ends of the ball cage (6), characterized in that: Both the inner ring (1) and the outer ring (2) have cavities (5) inside. Both cavities (5) have multiple second threaded holes (9) on their inner sidewalls. The multiple second threaded holes (9) pass through the inner sidewalls of the two cavities (5) and lead to the outer sidewall of the inner ring (1) and the inner sidewall of the outer ring (2). Both second threaded holes (9) have a sealing heat-conducting structure (10) inside. Both cavities (5) have a phase change material (11) inside. The sealed thermally conductive structure (10) includes a thermally conductive plug (1002), which is threaded into the interior of the second threaded hole (9). A hard thermally conductive silicone (1001) is provided between the thermally conductive plug (1002) and the ball body (4) inside the second threaded hole (9). A thermally conductive module (1003) is provided at the other end of the thermally conductive plug (1002).

2. The vacuum pump bearing according to claim 1, characterized in that: The heat-conducting module (1003) includes a heat-conducting rod (10031), which is fixedly connected to the end of the heat-conducting screw plug (1002). Multiple heat-conducting fins (10032) are provided on the outer side wall of the heat-conducting rod (10031).

3. The vacuum pump bearing according to claim 1, characterized in that: First threaded holes (7) are provided on one side of the upper inner wall of the two cavities (5) and on the other side of the lower inner wall of the two cavities (5), and threaded plugs (8) are provided inside the four first threaded holes (7).

4. A vacuum pump bearing according to claim 1, characterized in that: The contact surface between the rigid thermally conductive silicone (1001) and the ball body (4) is provided with an arc surface.

5. A special bearing for vacuum pumps according to claim 1, characterized in that: Both phase change materials (11) are made of fatty acid salts.

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