A thrust bearing and a pump
By adopting a thrust bearing design that combines the bearing body with an axial extension section in the pump, the problems of high design cost and large installation space of thrust bearings are solved, achieving the effects of cost reduction and axial dimension shortening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI SHINHOO NEW ENERGY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-26
AI Technical Summary
Existing pump designs using thrust bearings or thrust rings are costly and require a large installation space, thus extending the pump's axial dimension.
Design a thrust bearing comprising a bearing body and an axial extension section, wherein the outer diameter of the axial extension section is smaller than the outer diameter of the bearing body, for use in impeller retraction to provide thrust resistance, thereby reducing the number of parts and saving materials.
It reduces material and design costs, improves ease of installation, and shortens the pump's axial dimension.
Smart Images
Figure CN224282990U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pump technology, and in particular to a thrust bearing and a pump. Background Technology
[0002] In the prior art, the impeller is often located at the end of the shaft. When the pump starts or stops or the flow point changes, the impeller may move backward (the impeller moves to the side away from the end of the shaft). Therefore, a thrust bearing or thrust ring is fixed on the rear side of the impeller to withstand the axial force when the impeller moves backward, limit the axial position of the impeller, and ensure the stability of the pump operation.
[0003] In the existing technology, the thrust bearing or thrust ring needs to be designed as a separate part, which has a high design cost. At the same time, when assembling the pump, the thrust bearing or thrust ring needs to be assembled separately, which requires a large installation space and extends the axial dimension of the pump. Utility Model Content
[0004] One objective of this invention is to provide a thrust bearing to at least solve one of the aforementioned technical problems.
[0005] To achieve the above objectives, the first aspect of this utility model provides a thrust bearing configured in a pump, the pump including a shaft, an impeller, and a thrust bearing, wherein the impeller and the thrust bearing are both sleeved outside the shaft; the thrust bearing includes a bearing body and an axial extension, the axial extension being connected to one end of the bearing body near the impeller, and the outer diameter of the axial extension being smaller than the outer diameter of the bearing body.
[0006] Optionally, the inner diameter of the axial extension is larger than the inner diameter of the bearing body.
[0007] Optionally, the inner diameter of the axial extension is 0.2mm-2mm larger than the inner diameter of the bearing body.
[0008] Optionally, the axial extension is integrally formed with the bearing body.
[0009] Optionally, the axial extension segment is a circular ring structure.
[0010] Optionally, the axial extension has a length of 2mm-5mm along the axial direction.
[0011] Another objective of this invention is to provide a pump that at least solves one of the aforementioned technical problems.
[0012] To achieve this objective, the second aspect of this utility model adopts the following technical solution:
[0013] A pump includes a pump casing and a rotating shaft, an impeller, a bearing housing, and a thrust bearing, all disposed within the pump casing. The rotating shaft is rotatably disposed within the pump casing, the impeller is fixedly sleeved outside the rotating shaft, the thrust bearing is rotatably sleeved outside the rotating shaft, and the bearing housing is connected to the pump casing and fixedly connected to the outside of the thrust bearing.
[0014] Optionally, there is an axial gap between the axial extension and the impeller.
[0015] Optionally, the gap between the axial extension section and the impeller is 1mm-4mm.
[0016] Optionally, in the radial direction, there is a gap between the axial extension and the inner wall of the bearing housing.
[0017] As can be seen from the above, the technical solution provided by this utility model has an axial extension section extending from the bearing body, so that when the impeller moves backward, it will preferentially rub against the added axial extension section to form a friction pair. The axial extension section acts as a thrust bearing or thrust ring.
[0018] The outer diameter of the axial extension is smaller than the outer diameter of the bearing body, so as not to affect the installation of the thrust bearing. At the same time, it saves materials and facilitates the processing to form the axial extension.
[0019] Connecting the axial extension to the bearing body reduces the number of pump parts, lowers material and design costs, increases assembly convenience, and shortens the overall pump's axial dimension. Attached Figure Description
[0020] Figure 1 This is a partial structural schematic diagram of the pump provided in an embodiment of this utility model.
[0021] In the picture:
[0022] 10. Thrust support bearing; 1. Bearing body; 2. Axial extension section;
[0023] 20. Impeller; 30. Bearing housing; 40. Shaft; 50. Pump casing. Detailed Implementation
[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0025] This utility model defines certain directional terms. Unless otherwise stated, the directional terms used, such as "up", "down", "left", "right", "inner", and "outer", are used for ease of understanding and therefore do not constitute a limitation on the scope of protection of this utility model.
[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] This embodiment provides a thrust bearing 10 for use in a pump, but is not limited thereto, to improve pump installation efficiency, reduce pump cost, and reduce pump axial dimensions.
[0029] like Figure 1 As shown, the pump provided in this embodiment includes a rotating shaft 40, an impeller 20, and a thrust support bearing 10. Both the impeller 20 and the thrust support bearing 10 are sleeved on the rotating shaft 40. The thrust support bearing 10 includes a bearing body 1 and an axial extension section 2. The axial extension section 2 is connected to one end of the bearing body 1 near the impeller 20. The outer diameter of the axial extension section 2 is smaller than the outer diameter of the bearing body 1, so as not to affect the installation of the thrust support bearing 10 and to facilitate the axial fixation of the bearing body 1.
[0030] In this embodiment, an axial extension section 2 extends from the bearing body 1, so that when the impeller 20 retracts, it preferentially rubs against the added axial extension section 2 to form a friction pair. The axial extension section 2 acts as a thrust bearing or thrust ring.
[0031] Connecting the axial extension section 2 to the bearing body 1 reduces the number of pump parts, lowers material and design costs, increases assembly convenience, and shortens the overall pump's axial dimension.
[0032] The structure of the bearing body 1 is the same as that of the bearing in the prior art, and it can be a sliding bearing in the prior art. Therefore, the specific structure of the bearing body 1 will not be described in detail.
[0033] Optionally, the inner diameter of the axial extension 2 is larger than the inner diameter of the bearing body 1, so that even if the precision of the inner wall of the axial extension 2 is not high, it will not affect the installation of the thrust support bearing 10. For example, the inner diameter of the axial extension 2 is 0.2mm-2mm larger than the inner diameter of the bearing body 1, so as not to affect the friction between the axial extension 2 and the impeller 20, and to ensure the strength of the axial extension 2.
[0034] Preferably, the axial extension segment 2 can be a circular annular structure, that is, both the inner and outer walls of the axial extension segment 2 are circumferential surfaces. For example, the axial extension segment 2 is integrally formed with the bearing body 1, thereby improving processing efficiency.
[0035] Optionally, the axial extension section 2 has an axial length H2 of 2mm-5mm, so that the axial extension section 2 always has a thrust-resistant function before the pump fails. If the axial extension section 2 is severely worn, causing the impeller 20 to directly contact the bearing body 1, it indicates that the impeller 20 is vibrating severely, the pump is too noisy, the pump has failed, and a new pump needs to be replaced.
[0036] This embodiment also provides a pump, which includes a pump casing 50 and a rotating shaft 40, an impeller 20, a bearing housing 30, and the aforementioned thrust bearing 10, all disposed within the pump casing 50. The rotating shaft 40 is rotatably disposed within the pump casing 50, the impeller 20 is fixedly sleeved outside the rotating shaft 40, and the thrust bearing 10 is rotatably sleeved outside the rotating shaft 40. The bearing housing 30 is connected to the pump casing 50 and is fixedly connected to the outside of the thrust bearing 10. The bearing housing 30 can be a bearing housing of a pump in the prior art, and its specific structure will not be described in detail.
[0037] Since the bearing housing 30 is connected to the pump casing 50 and fixedly connected to the thrust support bearing 10, which is rotatably sleeved on the shaft 40, the bearing housing 30 and the thrust support bearing 10 support the shaft 40, allowing it to rotate stably under the drive of the motor. The shaft 40 is connected to the impeller 20, thereby driving the impeller 20 to rotate and increasing the flow rate of the liquid medium. The axial extension section 2 is located on the side of the bearing body 1 near the impeller 20, so that when the impeller 20 retracts, it preferentially rubs against the added axial extension section 2 to form a friction pair. Therefore, the thrust support bearing 10 also functions as a thrust bearing or thrust ring. The pump provided in this embodiment is low in cost, easy to install, and has a compact axial structure and small size.
[0038] Optionally, there is an axial gap between the axial extension 2 and the impeller 20 to avoid interference between the impeller 20 and the thrust support bearing 10 and the bearing housing 30.
[0039] For example, the gap H1 between the axial extension section 2 and the impeller 20 is 1mm-4mm, thereby preventing the impeller 20 from retreating too much and ensuring the working stability of the pump.
[0040] In the radial direction, there is a gap between the axial extension 2 and the inner wall of the bearing housing 30 so that the axial extension 2 does not affect the installation of the thrust support bearing 10.
[0041] Although the present invention has been described in detail above with general descriptions, specific embodiments, and experiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A thrust support bearing configured to be disposed in a pump, the pump comprising a rotating shaft (40), an impeller (20) and a thrust support bearing, the impeller (20) and the thrust support bearing are both sleeved outside the rotating shaft (40); characterized in that, The thrust support bearing includes a bearing body (1) and an axial extension section (2). The axial extension section (2) is connected to one end of the bearing body (1) near the impeller (20). The outer diameter of the axial extension section (2) is smaller than the outer diameter of the bearing body (1).
2. The thrust bearing according to claim 1, characterized in that, The inner diameter of the axial extension section (2) is larger than the inner diameter of the bearing body (1).
3. The thrust bearing according to claim 1, characterized in that, The inner diameter of the axial extension section (2) is 0.2 mm to 2 mm larger than the inner diameter of the bearing body (1).
4. The thrust bearing according to claim 1, characterized in that, The axial extension section (2) is integrally formed with the bearing body (1).
5. The thrust bearing according to claim 1, characterized in that, The axial extension section (2) has a circular ring structure.
6. The thrust bearing according to any one of claims 1-5, characterized in that, The axial extension section (2) has a length of 2mm-5mm along the axial direction.
7. A pump, characterized in that, The system includes a pump housing (50) and a rotating shaft (40), an impeller (20), a bearing housing (30), and a thrust bearing as described in any one of claims 1-6, all disposed within the pump housing (50). The rotating shaft (40) is rotatably disposed within the pump housing (50). The bearing housing (30) is connected to the pump housing (50) and is fixedly connected to the outside of the thrust support bearing.
8. The pump according to claim 7, characterized in that, There is an axial gap between the axial extension section (2) and the impeller (20).
9. The pump according to claim 8, characterized in that, The gap between the axial extension section (2) and the impeller (20) is 1mm-4mm.
10. The pump according to claim 7, characterized in that, In the radial direction, there is a gap between the axial extension (2) and the inner wall of the bearing housing (30).