High-speed centrifugal ceramic ball bearing vacuum pump
By adopting ceramic ball bearings and double seal design in the vacuum pump, combined with heat dissipation channels and small impellers, the problem of unstable sealing structure is solved, and more efficient and stable vacuum pump performance and adaptability to a wider range of application environments are achieved.
Patent Information
- Application Number
- CN202423168129.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The sealing structure of existing vacuum pumps is unstable, resulting in leakage and poor performance, making it difficult to work stably in complex environments.
It adopts ceramic ball bearings and double sealing design, including installing O-rings and applying sealant at the radial fitting of the motor barrel and the end cover, and setting a floating sealing ring on the axial fitting surface, combined with heat dissipation channels and small impellers to improve sealing and heat dissipation efficiency.
It significantly improves the sealing performance and working stability of the vacuum pump, enhances its adaptability in high temperature, high pressure and corrosive gas environments, extends the equipment life and reduces energy consumption.
Smart Images
Figure CN223411047U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum pumps, in particular to a high-speed centrifugal ceramic ball bearing vacuum pump. Background Art
[0002] A vacuum pump is a device used to extract gas from a closed space, thereby reducing the gas pressure in the space to below the external atmospheric pressure, thereby creating a vacuum environment. It achieves gas extraction and pressure reduction through various mechanical, physical, or chemical methods.
[0003] At present, vacuum pumps are widely used in various fields, and the current vacuum pumps have achieved certain results in improving the performance of the pumps. However, the sealing structure still has certain limitations, which may lead to unstable sealing performance of the pumps. Therefore, some adjustments need to be made to its sealing performance. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a high-speed centrifugal ceramic ball bearing vacuum pump. The vacuum pump with this structure can be better waterproof and enhance its sealing performance.
[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:
[0006] A high-speed centrifugal ceramic ball bearing vacuum pump, comprising:
[0007] A pump body, comprising a volute and a three-dimensional flow impeller installed inside the volute;
[0008] The motor component includes a motor barrel and a front end cover and a rear end cover provided at both ends of the motor barrel, the front end cover being fixedly connected to the volute, the interior of the motor barrel being provided with a rotor shaft which is axially arranged and fixed at both ends to the front end cover and the rear end cover, a rotor punching body installed in the middle of the rotor shaft, and a stator installed on the outer diameter of the rotor punching body, and bearings being provided at the connection between the front end cover and the rear end cover and the rotor shaft;
[0009] Install O-ring E at the radial fit between the motor barrel and the front end cover, and install O-ring B at the radial fit between the motor barrel and the rear end cover, and apply sealant on both axial fit surfaces.
[0010] Preferably, a first floating sealing ring and a second floating sealing ring are respectively installed on the front end cover and the rear end cover. The first floating sealing ring is located on the connecting surface between the front end cover and the three-dimensional flow impeller and is arranged around the left end of the rotor shaft. The second floating sealing ring is arranged in the rear end cover and is arranged around the right end of the rotor shaft.
[0011] Preferably, a junction box is installed on the outer diameter of the motor barrel, a sealing gasket is installed between the junction box and the motor barrel, and a terminal block is provided in the junction box.
[0012] Preferably, the rear end cover is provided with a small impeller, the motor barrel is provided with a heat dissipation channel arranged along the axial direction, and the rear end cover is provided with a wind cover covering the small impeller and the heat dissipation channel.
[0013] Preferably, a fixedly connected fairing is provided on the end of the three-dimensional flow impeller.
[0014] Preferably, the three-dimensional flow impeller operates in zero-contact with the volute and the front end cover, and the design gap between each of the three components is 0.4-0.6 mm.
[0015] Preferably, the bearing is a ceramic ball bearing.
[0016] In summary, the advantages of the present invention are as follows:
[0017] 1. Install O-rings E and B on the radial mating parts between the motor barrel and the front and rear covers, and apply sealant on the axial mating surfaces. This double sealing design greatly improves the sealing performance, effectively prevents gas leakage, and ensures the working efficiency and stability of the vacuum pump;
[0018] 2. The utility model fully considers environmental adaptability in material selection and structural design, and can work stably in a variety of complex environments, such as high temperature, high pressure, corrosive gas and other environments, greatly broadening the scope of application;
[0019] 3. Through the mutual cooperation of the wind cover, the impeller and the heat dissipation channel, the vacuum pump can better dissipate heat, so that it can work stably in a higher temperature environment, thereby enhancing its reliability and service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural diagram of the utility model;
[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;
[0022] Figure 3 Schematic diagram of the local structure of the O-ring E;
[0023] Figure 4 Schematic diagram of the local structure of O-ring B;
[0024] Figure 5 is a schematic diagram of the partial structure of the first floating sealing ring;
[0025] Figure 6 is a schematic diagram of the partial structure of the second floating sealing ring;
[0026] Figure numerals: 1. volute; 2. three-dimensional flow impeller; 3. motor barrel; 4. front end cover; 5. rear end cover; 6. rotor shaft; 7. rotor punching body; 8. stator; 9. bearing; 10. O-ring E; 11. O-ring B; 12. first floating sealing ring; 13. second floating sealing ring; 14. junction box; 15. sealing gasket; 16. small impeller; 17. heat dissipation channel; 18. wind cover; 19. fairing. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0028] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0029] It should also be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0030] The following is a detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings.
[0031] like Figures 1 to 6 As shown, a high-speed centrifugal ceramic ball bearing vacuum pump includes a pump body for gas suction, compression and discharge and a motor component for driving the vacuum pump to operate.
[0032] like Figures 1 to 2 As shown, the pump body includes a volute 1 and a three-dimensional flow impeller 2 installed inside the volute 1.
[0033] The motor components described above include a motor barrel 3 and a front end cover 4 and a rear end cover 5 provided on both ends of the motor barrel 3. The front end cover 4 is fixedly connected to the volute 1 by screws. The interior of the motor barrel 3 is provided with a rotor shaft 6 which is axially arranged and fixed at both ends to the front end cover 4 and the rear end cover 5 respectively, a rotor punching body 7 installed in the middle of the rotor shaft 6, and a stator 8 installed on the outer diameter of the rotor punching body 7.
[0034] The left end of the rotor shaft 6 passes through the front cover 4 and connects to the three-dimensional flow impeller 2. The three-dimensional flow impeller 2 operates in zero-contact with the volute 1 and the front cover 4. The clearance between each of the three components is designed to be 0.4-0.6mm. This structural design significantly reduces component wear, thereby extending the service life of the equipment.
[0035] Since there is no additional resistance caused by contact friction, the loss of mechanical energy is greatly reduced, allowing the equipment to more efficiently convert the input electrical energy or other power into kinetic energy and pressure energy of the fluid, thereby improving the overall operating efficiency of the equipment and reducing energy consumption.
[0036] This designed gap enables the gas to flow more smoothly between the three-dimensional flow impeller 2 and the volute 1, reduces the generation of eddies and turbulence, improves the flow efficiency of the fluid, further enhances the performance of the equipment, reduces energy loss, and makes the pressure and flow of the fluid more stable.
[0037] like Figures 1 to 2 As shown, bearings 9 are provided at the connection between the front and rear covers 4 and 5 and the rotor shaft 6. These bearings 9 are ceramic ball bearings. These bearings 9 have high hardness and a low coefficient of friction, significantly extending the life of the device. Furthermore, the material has strong high-temperature resistance and insulation properties, ensuring stable operation of the vacuum pump.
[0038] like Figures 1 to 4 As shown, in order to better ensure the waterproof performance of the vacuum pump equipment, an O-ring E10 is installed at the radial fitting position between the motor barrel 3 and the front end cover 4, and an O-ring B11 is installed at the radial fitting position between the motor barrel 3 and the rear end cover 5, and sealant is applied on both axial fitting surfaces.
[0039] like Figures 1 to 6 As shown, in order to further enhance the waterproof performance, a first floating sealing ring 12 and a second floating sealing ring 13 are respectively installed on the front cover 4 and the rear cover 5 of the vacuum pump. The first floating sealing ring 12 is located on the connecting surface between the front cover 4 and the three-dimensional flow impeller 2 and is arranged around the left end of the rotor shaft 6. The second floating sealing ring 13 is arranged in the rear cover 5 and is arranged around the right end of the rotor shaft 6.
[0040] A junction box 14 is installed on the outer diameter of the motor barrel 3, and a sealing gasket 15 is installed between the junction box 14 and the motor barrel 3. A terminal block is provided in the junction box 14.
[0041] like Figures 1 to 2As shown, the rear end cover 5 is provided with a small impeller 16, and the motor barrel 3 is provided with a heat dissipation channel 17 arranged in the axial direction. The rear end cover 5 is provided with a wind shield 18 covering the small impeller 16 and the heat dissipation channel 17. Since the entire motor will generate high temperature during operation, the function of the small impeller 16 is to rotate at high speed through direct drive, generate a flow field through the small blades 9, and generate a wind pressure area in the wind shield 18. The cold air passes through the cavity on the surface of the motor barrel 3 to dissipate heat for the entire motor.
[0042] like Figures 1 to 2 As shown, a fairing 19 is fixedly attached to the end of the three-dimensional flow impeller 2. The operating principle of a vacuum pump is to allow the gas to acquire kinetic energy and pressure energy through the rotation of the impeller, thereby achieving gas discharge. The presence of the fairing 19 allows the gas to enter the impeller at a more appropriate angle and speed, improving the impeller's efficiency in working the gas, thereby increasing the vacuum pump's extraction efficiency and further optimizing gas flow.
[0043] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professional and technical personnel in the field can implement or use the present invention. Various modifications to these embodiments will be obvious to professional and technical personnel in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A high-speed centrifugal ceramic ball bearing vacuum pump comprising: A pump body, comprising a volute (1) and a three-dimensional flow impeller (2) installed inside the volute (1); A motor component, comprising a motor barrel (3) and a front end cover (4) and a rear end cover (5) provided at both ends of the motor barrel (3); the front end cover (4) being fixedly connected to the volute (1); a rotor shaft (6) being axially arranged inside the motor barrel (3) and having its two ends respectively fixed to the front end cover (4) and the rear end cover (5); a rotor punching body (7) installed in the middle of the rotor shaft (6); and a stator (8) installed on the outer diameter of the rotor punching body (7); and bearings (9) being provided at the connection between the front end cover (4), the rear end cover (5) and the rotor shaft (6); The invention is characterized in that an O-ring E (10) is installed at the radial fitting position between the motor barrel (3) and the front end cover (4), an O-ring B (11) is installed at the radial fitting position between the motor barrel (3) and the rear end cover (5), and sealant is applied on both axial fitting surfaces.
2. A high-speed centrifugal ceramic ball bearing vacuum pump according to claim 1, characterized in that: A first floating sealing ring (12) and a second floating sealing ring (13) are respectively mounted on the front end cover (4) and the rear end cover (5); the first floating sealing ring (12) is located on the connection surface between the front end cover (4) and the three-dimensional flow impeller (2) and is arranged around the left end of the rotor shaft (6); the second floating sealing ring (13) is arranged in the rear end cover (5) and is arranged around the right end of the rotor shaft (6).
3. A high-speed centrifugal ceramic ball bearing vacuum pump according to claim 1, characterized in that: A junction box (14) is installed on the outer diameter of the motor barrel (3), a sealing gasket (15) is installed between the junction box (14) and the motor barrel (3), and a terminal block is provided in the junction box (14).
4. A high-speed centrifugal ceramic ball bearing vacuum pump according to claim 1, characterized in that: The rear end cover (5) is provided with a small impeller (16), the motor barrel (3) is provided with a heat dissipation channel (17) arranged in the axial direction, and the rear end cover (5) is provided with a wind cover (18) covering the small impeller (16) and the heat dissipation channel (17).
5. The high-speed centrifugal ceramic ball bearing vacuum pump according to claim 1, characterized in that: A fixedly connected fairing (19) is provided on the end of the three-dimensional flow impeller (2).
6. A high-speed centrifugal ceramic ball bearing vacuum pump according to claim 1, characterized in that: The three-dimensional flow impeller (2) operates in zero-contact with the volute (1) and the front cover (4), and the designed gap between each of the three components is 0.4-0.6 mm.
7. The high-speed centrifugal ceramic ball bearing vacuum pump according to claim 1, characterized in that: The bearing (9) is a ceramic ball bearing.