A deep-well pump cross-shaped thrust bearing structure
By designing a cross-shaped thrust bearing structure, the bidirectional swing adaptation of the thrust bearing seat and thrust bearing is achieved, solving the problem of uneven contact in deep well pump bearings, improving bearing stability and lifespan, and reducing the precision requirements for manufacturing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PENGYANG PUMP TAIZHOU CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-07
AI Technical Summary
The existing deep well pump thrust bearing seat has insufficient swing flexibility, resulting in uneven contact. This can easily lead to dry friction and heat accumulation in local areas, affecting the long-term reliability and service life of the bearing.
The thrust bearing adopts a cross-shaped thrust bearing structure. The thrust bearing seat and the thrust bearing are connected to the support pin through a ball joint structure to achieve bidirectional swing of the X and Y axes, adaptively compensate for machining errors, and ensure that the thrust bearing and the plane bearing are fully in contact to form a stable water film.
By employing a bidirectional oscillating adaptive mechanism, contact pressure is evenly distributed, avoiding localized dry friction, thereby improving the bearing's operational stability and lifespan, and reducing production costs.
Smart Images
Figure CN224469357U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of deep well pump thrust bearing technology, specifically to a cross-shaped thrust bearing structure for deep well pumps. Background Technology
[0002] In the field of deep well pumps, especially water-immersed deep well pumps, the thrust bearing structure is a key component bearing the axial load of the motor rotor and pump body. This structure typically consists of a high-speed rotating plane bearing, a relatively stationary thrust bearing, a thrust bearing seat, and a support base. The axial load is transmitted through the rotor to the plane bearing, then sequentially through the thrust bearing, the thrust bearing seat, and finally borne by the support base. The plane bearing and the thrust bearing form a high-speed rotating friction pair. To ensure long-term reliable operation, not only are highly smooth and flat contact surfaces required with sufficient fit, but also a stable water film formed between the contact surfaces by the lubricating and cooling aqueous solution filled inside the pump for heat dissipation and lubrication. In existing technology, to compensate for the effects of machining accuracy (perpendicularity and runout errors), the thrust bearing is often designed as 2-3 independent bearings and installed on the thrust bearing seat, giving it a certain degree of oscillation capability. However, the thrust bearing seat usually contacts the support base through an arc surface, which results in high friction and severely limits the oscillation flexibility of the thrust bearing seat.
[0003] Under actual high-speed operating conditions, due to the limited swing capability of the thrust bearing seat, it is difficult to ensure completely uniform and sufficient contact between the thrust bearing and the high-speed rotating planar bearing when installation or machining errors exist. This poor contact can easily lead to excessive stress in local areas, disrupting the crucial water film between them. Once the water film ruptures, dry friction will occur between the thrust bearing and the planar bearing, generating a large amount of heat and rapidly causing the thrust bearing to burn and be damaged, seriously affecting the long-term operational reliability and service life of the deep well pump. Therefore, there is an urgent need for a new thrust bearing structure that can significantly improve the swing flexibility and self-adaptive capability of the thrust bearing to effectively solve the problem of uneven contact and ensure the stable formation and maintenance of the water film.
[0004] It should be noted that the above content falls within the scope of technical knowledge of those skilled in the art. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content
[0005] 1. The technical problem to be solved by the utility model:
[0006] This utility model provides a cross-shaped thrust bearing structure for a deep well pump, which solves the technical problems existing in the background art.
[0007] 2. Technical Solution:
[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: a cross-shaped thrust bearing structure for a deep well pump, including a support base, wherein at least two support pins are symmetrically fixedly installed on the top of the support base, and the top of the support pins is provided with a ball head structure;
[0009] A thrust bearing seat is provided above the support pin. The bottom surface of the thrust bearing seat is provided with a ball-head blind hole corresponding to the position of the support pin. The inner wall of the ball-head blind hole is spherical and cooperates with the ball-head structure, so that the thrust bearing seat can swing in the first direction with the support pin as the fulcrum.
[0010] The thrust pad is installed on the thrust pad seat. The top surface of the thrust pad seat is provided with two square grooves, and the direction of the line connecting the centers of the square grooves is perpendicular to the direction of the line connecting the centers of the ball head blind holes on the bottom surface.
[0011] And, a planar bearing that forms a friction pair with the thrust bearing;
[0012] The bottom surface of the thrust pad is provided with a square boss embedded in a square groove, and the top of the boss is provided with a spherical protrusion, so that the thrust pad can swing relative to the thrust pad seat in a second direction perpendicular to the first direction.
[0013] In this embodiment, the structure of this application is located at the end of the deep well pump. Other parts of the deep well pump adopt existing technology, which will not be described in detail here. During assembly, the ball head blind hole at the bottom of the thrust bearing seat is aligned with the pin ball head at the top of the support seat and pressed in to form a ball joint fit. The thrust bearing seat can swing around the X-axis. The square boss at the bottom of the thrust bearing is embedded into the square groove at the top of the thrust bearing seat. The ball head surface protrusion at the top of the boss contacts the bottom surface of the groove, allowing the thrust bearing to swing around the Y-axis. The planar bearing is pressed onto the surface of the thrust bearing to complete the cross-bearing system. When the deep well pump is running, the motor rotor drives the planar bearing to rotate at high speed and transmits axial load. The axial force pushes the thrust bearing, causing the thrust bearing to swing slightly in the Y-axis direction within the square groove through the ball head surface protrusion at the bottom, automatically compensating for the planar bearing. The device addresses local unevenness in the bearing, achieving the first level of self-adaptation. Subsequently, residual off-center load is transmitted to the thrust bearing seat, causing the ball-head blind hole at its bottom to swing around the ball-head structure of the support pin in the X-axis direction, further eliminating contact deviation and achieving the second level of self-adaptation. This device achieves full-angle self-adaptation through the cross-shaped vertical swing of the X and Y axes, ensuring that the surface of the thrust bearing is always fully in contact with the planar bearing, eliminating local contact gaps caused by machining errors. Furthermore, under the dual-swing self-adaptive mechanism, the contact pressure distribution between the thrust bearing and the planar bearing is uniform, avoiding local dry friction. This device uses a cross-shaped swing structure to replace high-precision machining requirements with mechanical self-adaptability, enabling the thrust bearing to maintain a stable water film under low-cost manufacturing conditions, thus solving the industry pain point of deep well pump bearing erosion.
[0014] Furthermore, the support pins are provided in two, evenly distributed along the circumference of the support seat and at the same height, to ensure that the swing plane of the thrust bearing seat is parallel to the plane bearing.
[0015] Furthermore, the ball-head blind holes are symmetrically distributed on both sides of the center of the bottom surface, and their axes are perpendicular to the central axis of the support base. The diameter of the ball-head structure is smaller than the distance between the ball-head blind holes.
[0016] Furthermore, the contact surface between the thrust bearing and the planar bearing has a mirror-polished structure.
[0017] 3. Beneficial effects:
[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0019] This utility model is rationally designed. It utilizes the thrust pad's ability to slightly oscillate around the Y-axis to compensate for local unevenness in the planar bearing, and the thrust pad seat's ability to swing around the X-axis to eliminate residual off-center load, forming a cross-shaped dual-degree-of-freedom adjustment to ensure full contact surface fit. The dual-oscillation mechanism ensures uniform pressure distribution between the thrust pad and the planar bearing, maintains a stable water film, avoids local dry friction and high-temperature erosion, and significantly improves bearing life. It replaces high-precision machining requirements with mechanical self-adaptability, allowing components to be manufactured under conventional tolerances, reducing production costs while ensuring operational stability.
[0020] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model before assembly;
[0022] Figure 2 This utility model Figure 1 A schematic diagram of the structure in another direction;
[0023] Figure 3 This is a schematic diagram of the position and structure of the deep well pump according to this utility model;
[0024] Figure 4 This is a schematic diagram of the assembled structure of this utility model.
[0025] Figure label:
[0026] 1. Support seat; 2. Support pin; 3. Ball head structure; 4. Thrust pad seat; 5. Ball head blind hole; 6. Thrust pad; 7. Surface bearing; 8. Square boss; 9. Ball head surface protrusion. Detailed Implementation
[0027] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] It should be noted that structures not described in this invention do not involve the design points and improvement directions of this invention, and can all be achieved using existing technologies known to those skilled in the art.
[0032] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.
[0033] See attached document Figure 1-4 A cross-shaped thrust bearing structure for a deep well pump includes a support base 1, on which at least two support pins 2 are symmetrically fixedly installed, and the top of the support pins 2 is provided with a ball head structure 3.
[0034] The thrust bearing seat 4 is set above the support pin 2. The bottom surface of the thrust bearing seat 4 is provided with a ball head blind hole 5 corresponding to the position of the support pin 2. The inner wall of the ball head blind hole 5 is spherical and cooperates with the ball head structure 3, so that the thrust bearing seat 4 can swing in the first direction with the support pin 2 as the fulcrum.
[0035] The thrust pad 6 is installed on the thrust pad seat 4. The top surface of the thrust pad seat 4 is provided with two square grooves, and the direction of the line connecting the centers of the square grooves is perpendicular to the direction of the line connecting the centers of the ball head blind hole 5 on the bottom surface.
[0036] And, a flat bearing 7 that forms a friction pair with the thrust bearing 6, with the top of the flat bearing 7 being the main structure of the deep well pump;
[0037] The bottom surface of the thrust pad 6 is provided with a square boss 8 embedded in a square groove, and the top of the boss is provided with a spherical protrusion 9, so that the thrust pad 6 can swing relative to the thrust pad seat 4 in a second direction perpendicular to the first direction.
[0038] In this embodiment, the structure of this application is located at the end of the deep well pump. Other parts of the deep well pump adopt existing technology, which will not be described in detail here. During assembly, the ball head blind hole 5 at the bottom of the thrust bearing seat 4 is aligned with the pin ball head at the top of the support seat 1 and pressed in to form a ball joint fit. The thrust bearing seat 4 can swing around the X-axis. The square boss 8 at the bottom of the thrust bearing 6 is embedded into the square groove at the top of the thrust bearing seat 4. The ball head protrusion 9 at the top of the boss contacts the bottom surface of the groove. The thrust bearing 6 can swing around the Y-axis. The plane bearing 7 is pressed onto the surface of the thrust bearing 6 to complete the cross bearing system. When the deep well pump is running, the motor rotor drives the plane bearing 7 to rotate at high speed and transmits axial load. The axial force pushes the thrust bearing 6, causing the thrust bearing 6 to swing slightly in the Y-axis direction in the square groove through the ball head protrusion 9 at the bottom, automatically compensating for the flatness. The local unevenness of the face bearing 7 achieves the first level of self-adaptation. Subsequently, the residual off-center load is transmitted to the thrust bearing seat 4, which pushes the ball head blind hole 5 at its bottom to swing around the ball head structure 3 of the support pin 2 in the X-axis direction, further eliminating contact deviation and achieving the second level of self-adaptation. This device forms full-angle self-adaptation through the cross-shaped vertical swing of the X-axis and Y-axis, ensuring that the surface of the thrust bearing 6 is always fully in contact with the face bearing 7, eliminating the local contact gap caused by processing errors. Moreover, under the dual swing self-adaptation mechanism, the contact pressure distribution between the thrust bearing 6 and the face bearing 7 is uniform, avoiding local dry friction. This device replaces the high-precision processing requirements with mechanical self-adaptation through the cross-shaped swing structure, enabling the thrust bearing 6 to maintain a stable water film under low-cost manufacturing conditions, solving the industry pain point of deep well pump bearing erosion.
[0039] The support pins 2 are provided in two, evenly distributed around the circumference of the support base 1 and of the same height, to ensure that the swing plane of the thrust bearing 4 is parallel to the plane bearing 7. The evenly distributed and equal-height support pins 2 structurally ensure that the thrust bearing 4 is initially horizontal, overcoming the systematic skew caused by the machining error of the traditional arc-shaped support base 1, and also enabling the thrust bearing 4 to obtain a uniform initial support force, avoiding overload of the pins on one side.
[0040] The ball-head blind holes 5 are symmetrically distributed on both sides of the center of the bottom surface, and their axes are perpendicular to the central axis of the support base 1. The diameter of the ball-head structure 3 is smaller than that of the ball-head blind holes 5, so that the thrust bearing base 4 can swing on the ball-head structure 3 through the ball-head blind holes 5 at the bottom to achieve the adjustment function.
[0041] The contact surface between the thrust bearing 6 and the planar bearing 7 is a mirror-polished structure, which enables the aqueous solution to form an ultra-thin continuous water film.
[0042] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A cross-shaped thrust bearing structure for a deep well pump, characterized in that: Includes a support base (1), at least two support pins (2) are symmetrically fixedly installed on the top of the support base (1), and the top of the support pins (2) is provided with a ball head structure (3); The thrust bearing seat (4) is set above the support pin (2). The bottom surface of the thrust bearing seat (4) is provided with a ball head blind hole (5) corresponding to the position of the support pin (2). The inner wall of the ball head blind hole (5) is spherical and cooperates with the ball head structure (3), so that the thrust bearing seat (4) can swing in the first direction with the support pin (2) as the fulcrum. The thrust pad (6) is installed on the thrust pad seat (4). The top surface of the thrust pad seat (4) is provided with two square grooves, and the direction of the line connecting the centers of the square grooves is perpendicular to the direction of the line connecting the centers of the ball head blind hole (5) on the bottom surface. And, a planar bearing (7) that forms a friction pair with the thrust bearing (6); The bottom surface of the thrust pad (6) is provided with a square boss (8) embedded in a square groove, and the top of the boss is provided with a spherical protrusion (9), so that the thrust pad (6) can swing relative to the thrust pad seat (4) in a second direction perpendicular to the first direction.
2. The cross-shaped thrust bearing structure for a deep well pump according to claim 1, characterized in that: The support pins (2) are provided in two, which are evenly distributed around the support seat (1) and have the same height, to ensure that the swing plane of the thrust bearing seat (4) is parallel to the plane bearing (7).
3. The cross-shaped thrust bearing structure for a deep well pump according to claim 2, characterized in that: The ball head blind holes (5) are symmetrically distributed on both sides of the center of the bottom surface, and their axes are perpendicular to the central axis of the support base (1). The diameter of the ball head structure (3) is smaller than that of the ball head blind holes (5).
4. The cross-shaped thrust bearing structure for a deep well pump according to claim 1, characterized in that: The contact surface between the thrust bearing (6) and the planar bearing (7) is a mirror-polished structure.