A fixing structure of a ball head adjusting screw of a deep-well pump thrust bearing

Abstract

The utility model provides a kind of fixing structure of deep well pump thrust bearing ball head adjusting screw, it is related to deep well pump technical field, including deep well pump main body, the detachable connection motor base of deep well pump main body bottom, threaded hole is opened in motor base middle part, threaded hole matching connection adjusting screw, after adjusting screw assembly in place, the thread tooth outside the threaded hole is destroyed by punch riveting pressure and forms permanent locking structure, to solve the current conventional adjusting screw fixing mode usually adopts threaded connection, i.e. The thread is machined on the outer circle of adjusting screw, cooperates with motor base threaded hole, and is supplemented with threaded glue or locking nut to prevent loosening. However, threaded glue is prone to failure due to vibration and aging, and the waiting time is long. The locking nut may also loosen due to long-term vibration, ultimately leading to displacement or shedding of the adjusting screw, affecting the stability and lifespan of the bearing system.

Description

Technical Field

[0001] This utility model mainly relates to the field of deep well pump technology, specifically to a fixing structure for a ball head adjusting screw of a deep well pump thrust bearing. Background Technology

[0002] Water-lubricated thrust bearings for deep well pumps are a common structure, typically consisting of a thrust disc, thrust pads, pad seats, adjusting screws, and a motor base. The axial load of the motor is transmitted to the thrust disc via the shaft, then to the thrust pads and pad seats, and finally borne by the motor base, ensuring the system can withstand significant axial forces. The thrust disc rotates at high speed with the motor shaft, while the thrust pads are fixed by the pad seats; both must maintain relative motion while bearing the load. To avoid uneven contact due to machining errors, the thrust pads are usually designed as multiple independent, swingable structures, with spherical surfaces contacting the adjusting screws. This allows the pad seats to flexibly adjust their angle, thereby optimizing the contact state between the thrust disc and the pads.

[0003] The adjusting screw plays a dual role in this structure: firstly, it supports the bearing seat and ensures its flexible movement; secondly, it precisely adjusts the axial clearance between the bearing seat, the thrust bearing, and the thrust disc. Excessive clearance can lead to bearing detachment or increased operational vibration, while insufficient clearance may cause the thrust disc and bearing to press directly against each other, hindering lubricant from entering the friction surface and causing dry friction damage. Therefore, the fixing method of the adjusting screw is crucial, ensuring that it will not loosen or shift due to vibration during long-term operation; otherwise, it will lead to bearing system failure.

[0004] Traditional adjusting screw fixing methods typically employ threaded connections, where threads are machined on the outer circumference of the adjusting screw to mate with the threaded hole in the motor base, supplemented by thread-locking adhesive or a lock nut to prevent loosening. However, in practical applications, both methods have significant drawbacks. Thread-locking adhesive is prone to failure due to vibration and aging, and lock nuts can also loosen due to long-term vibration, ultimately leading to displacement or detachment of the adjusting screw, affecting the stability and lifespan of the bearing system.

[0005] 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

[0006] 1. The technical problem to be solved by the utility model:

[0007] This utility model provides a fixing structure for the ball head adjusting screw of the thrust bearing of a deep well pump, in order to solve the technical problems existing in the background art.

[0008] 2. Technical Solution:

[0009] To achieve the above objectives, the technical solution provided by this utility model is as follows: a fixing structure for a ball head adjusting screw of a deep well pump thrust bearing, comprising a deep well pump body, a motor base detachably connected to the bottom of the deep well pump body, a threaded hole in the middle of the motor base, and an adjusting screw matched and connected to the threaded hole. After the adjusting screw is assembled in place, the threads on the outer side of the threaded hole are crushed by a punch to form a permanent locking structure. In this embodiment, when the adjusting screw needs to be assembled, the adjusting screw is first screwed into the threaded hole to the set position. Then, a stamping device is used to apply a radial impact force to the meshing part of the threaded hole and the adjusting screw, causing local thread deformation. This ensures mechanical interlocking while avoiding excessive deformation that could affect the structural strength of the base. This structure is stable and reliable, and can significantly reduce the risk of detachment and loosening in a vibrating environment. Compared with traditional threaded adhesive fixing, which requires waiting for the adhesive to dry, it greatly saves the product production cycle. Furthermore, the structure is simple, does not add any materials due to screw locking, and has low cost.

[0010] Furthermore, the deformation of the thread teeth after riveting is controlled within 0.2-0.5mm.

[0011] Furthermore, the top of the adjusting screw is provided with a ball head structure, which forms a spherical pair connection with the ball socket at the bottom of the bearing seat; the bearing seat is provided with multiple mounting grooves evenly distributed around its circumference, the top of the mounting grooves is matched and connected to the thrust pad, the bottom surface of the thrust pad is provided with a semi-circular protrusion, the top plane of the thrust pad is provided with a thrust disk, and the thrust disk is located at the end of the rotating shaft of the deep well pump body.

[0012] Furthermore, the motor base has three connecting holes arranged in a ring, and the connecting holes are connected to the deep well pump body by long screws.

[0013] 3. Beneficial effects:

[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0015] This utility model features a reasonable design that achieves permanent locking by riveting to destroy the thread teeth, offering significant advantages over traditional thread-locking methods such as glue fixation or nut locking. This structure eliminates the need to wait for the glue to cure, greatly shortening assembly time and improving production efficiency; it also avoids loosening caused by vibration, ensuring long-term stability.

[0016] The ball joint structure and bearing seat design enable automatic self-alignment of multiple thrust bearings, ensuring even distribution of axial load. Precise positioning and reliable fixing of the adjusting screws allow for precise control of the thrust clearance, preventing vibration caused by excessive clearance and avoiding poor lubrication due to insufficient clearance, thus significantly extending bearing life.

[0017] The overall design of this structure is simple and reasonable, requiring no additional locking parts and reducing material costs. The motor base uses a detachable connection method, facilitating future maintenance and repair.

[0018] 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

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an exploded view of the structure of this utility model;

[0021] Figure 3 This is an exploded view of the structure of this utility model from another angle.

[0022] Figure label:

[0023] 1. Deep well pump body; 2. Motor base; 3. Threaded hole; 4. Adjusting screw; 41. Ball head structure; 42. Bearing seat; 43. Mounting groove; 44. Thrust bearing; 45. Semi-circular protrusion; 46. Thrust disc. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0030] See attached document Figure 1-3 A fixing structure for a ball head adjusting screw of a deep well pump thrust bearing includes a deep well pump body 1, a motor base 2 detachably connected to the bottom of the deep well pump body 1, a threaded hole 3 in the middle of the motor base 2, and an adjusting screw 4 mating with the threaded hole 3. After the adjusting screw 4 is assembled, the threads on the outer side of the threaded hole 3 are crushed by a punch to form a permanent locking structure. In this embodiment, when the adjusting screw 4 needs to be assembled, it is first screwed into the threaded hole 3 to the set position. Then, a stamping device is used to apply a radial impact force to the meshing part of the threaded hole 3 and the adjusting screw 4, causing local thread deformation. This ensures mechanical interlocking while avoiding excessive deformation that could affect the structural strength of the base. The structure is stable and reliable, and can significantly reduce the risk of detachment and loosening in a vibrating environment. Compared with traditional threaded adhesive fixing, which requires waiting for the adhesive to dry, it greatly saves the product production cycle. Furthermore, the structure is simple, does not add any materials due to screw locking, and has low cost.

[0031] The deformation of the thread teeth after riveting is controlled within 0.2-0.5mm. In this embodiment, the commonly used stamping deformation is used as an example, which can achieve a good locking effect. It should be noted that, depending on the size of the deep well pump, other suitable thread tooth depths can also be stamped.

[0032] The adjusting screw 4 has a ball head structure 41 at its top, which forms a spherical joint connection with the ball socket at the bottom of the bearing seat 42. The bearing seat 42 has multiple mounting grooves 43 evenly distributed around its circumference. The top of each mounting groove 43 is matched with a thrust bearing 44. The bottom surface of each thrust bearing 44 has a semi-circular protrusion 45 in the center, and a thrust disk 46 is correspondingly provided on the top plane of each thrust bearing 44. The thrust disk 46 is located at the end of the rotating shaft of the deep well pump body 1. In this embodiment, there are six mounting grooves 43, arranged in groups of two, with each group corresponding to one thrust bearing 44, for a total of three thrust bearings 44. When the bearing ball head adjustment structure is working, the adjusting screw 4 forms a universal connection with the bearing seat 42 through the ball head structure 41 at the top, allowing the bearing seat 42 to self-adaptively deflect within a certain angle range; the bottom of the thrust disk 46 is also connected to a plane bearing to achieve low friction and self-lubrication. When the shaft drives the thrust disk 46 to rotate, each thrust bearing 44 forms a uniform water film pressure under the action of hydraulic lubrication; the bearing seat 42 ensures that multiple thrust bearings 44 are evenly distributed through the self-aligning function of the ball head structure 41, avoiding local overload; at the same time, the riveting fixing method of the adjusting screw 4 effectively prevents axial loosening and ensures the stability of the thrust clearance.

[0033] The motor base 2 has three connecting holes arranged in a ring. The connecting holes are connected to the deep well pump body 1 by long screws. In this embodiment, the motor base 2 is connected to the deep well pump body 1 in a detachable manner, which facilitates later maintenance and repair.

[0034] 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 fixing structure for a ball-head adjusting screw of a deep well pump thrust bearing, characterized in that: The deep well pump body (1) is detachably connected to the bottom of the deep well pump body (1) and the motor base (2) is provided with a threaded hole (3) in the middle of the motor base (2). The threaded hole (3) is matched with an adjusting screw (4). After the adjusting screw (4) is assembled in place, the thread teeth on the outside of the threaded hole (3) are crushed by the punch to form a permanent locking structure.

2. The fixing structure of the ball head adjusting screw of the deep well pump thrust bearing according to claim 1, characterized in that: The deformation of the thread teeth after riveting should be controlled within 0.2-0.5mm.

3. The fixing structure of the ball head adjusting screw of the deep well pump thrust bearing according to claim 1, characterized in that: The adjusting screw (4) is provided with a ball head structure (41) at the top, which forms a spherical joint connection with the ball socket at the bottom of the bearing seat (42); the bearing seat (42) is provided with a plurality of mounting grooves (43) evenly distributed around its circumference, the top of the mounting grooves (43) is matched and connected to the thrust pads (44), the bottom surface of the thrust pads (44) is provided with a semi-circular protrusion (45) in the middle, the top plane of the thrust pads (44) is provided with a thrust disk (46), and the thrust disk (46) is located at the end of the rotating shaft of the deep well pump body (1).

4. The fixing structure of the ball head adjusting screw of the deep well pump thrust bearing according to claim 1, characterized in that: The motor base (2) has three connecting holes arranged in a ring. The connecting holes are connected to the deep well pump body (1) by long screws.

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