Locking device
The combination structure of bushing, locking parts and limiting parts solves the problem of the impeller and pump shaft being difficult to disassemble quickly, achieving stable connection and efficient disassembly and assembly, and reducing maintenance difficulty.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PIPECHINA SOUTH CHINA CO
- Filing Date
- 2025-06-04
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, the locking method between the impeller and the pump shaft has the problem of being difficult to disassemble quickly, especially under conditions of corrosion and bending, which increases the difficulty of maintenance, and the viscosity of crude oil can cause the locking to fail.
The impeller and pump shaft are stably connected by a combination of bushing, locking parts and limiting parts. The limiting groove and the limiting part are used to prevent relative rotation and ensure quick assembly and disassembly.
This achieves a stable connection between the impeller and the pump shaft, reducing maintenance difficulty and improving the ease of disassembly and assembly as well as operational efficiency.
Smart Images
Figure CN224134858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of impeller fixing technology, and in particular to a locking device. Background Technology
[0002] There are two main methods for locking and fixing the impeller of a pipeline oil pump to the pump shaft in existing technologies: interference fit and clearance fit. With prolonged operation, regardless of the fit method, the pump shaft will experience corrosion and bending, making it difficult to quickly remove the impeller from the shaft during maintenance, increasing the difficulty of the operation. Furthermore, the liquid pumped by the oil pump is crude oil, and the viscosity of crude oil increases the torque of the pump rotor. The locking nut bears the torque of the rotor's rotation; with prolonged operation, thread fatigue can lead to locking failure.
[0003] Therefore, a locking device is urgently needed to solve the above-mentioned technical problems. Utility Model Content
[0004] The purpose of this invention is to provide a locking device that not only ensures a stable connection between the impeller and the pump shaft, but also enables quick assembly and disassembly, reducing the difficulty of later maintenance and improving work efficiency.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A locking device for locking an impeller and a pump shaft, comprising:
[0007] A bushing is disposed on the outer periphery of the pump shaft and connected to the impeller. The bushing is provided with a first limiting groove along the axial direction.
[0008] A locking element is provided, which is locked to the outer periphery of the pump shaft and located at the end of the shaft sleeve away from the impeller.
[0009] A limiting member is disposed between the bushing and the locking member. One side of the limiting member has a first limiting part protruding and is correspondingly engaged in the first limiting groove. The other side of the limiting member is connected to the locking member so that the bushing cannot move along its own axial direction.
[0010] Preferably, the locking member has a second limiting groove on the side near the bushing, and the limiting member has a second limiting part on the side away from the first limiting part, and the second limiting part can be correspondingly engaged and limited in the second limiting groove.
[0011] Preferably, the first limiting groove is disposed around the inner circumference of the bushing, and the locking member is provided with a plurality of second limiting grooves at circumferential intervals on the side near the bushing.
[0012] Preferably, both the first limiting part and the second limiting part are provided in multiples at intervals along the circumference of the limiting member.
[0013] Preferably, the limiting member is provided with a mounting hole, and the limiting member can be sleeved on the outer periphery of the pump shaft through the mounting hole, and a plurality of first limiting parts and a plurality of second limiting parts are all provided on the outer periphery of the mounting hole.
[0014] Preferably, the locking device further includes a stop member disposed on the side of the locking member away from the limiting member, so that the locking member cannot move away from the limiting member.
[0015] Preferably, the anti-reverse component includes a first body and a second body connected to each other. The first body can be snapped into a groove on the outer periphery of the pump shaft, and the second body is connected to the locking component.
[0016] Preferably, the locking member has a backlash groove on the side opposite to the bushing, and the second body can be correspondingly engaged with the backlash groove.
[0017] Preferably, the first body and the second body are perpendicular to each other and are integrally formed.
[0018] Preferably, multiple anti-reverse grooves are provided at intervals along the circumference of the locking member, and multiple anti-reverse members are also provided accordingly.
[0019] The beneficial effects of this utility model are:
[0020] This utility model discloses a locking device. The locking device includes a bushing, a locking element, and a limiting element. When using this locking device, the bushing is connected to the impeller, while the locking element is fixed to the outer circumference of the pump shaft and can be connected to the bushing via the limiting element, thus indirectly fixing the impeller to the pump shaft. Simultaneously, the first limiting part of the limiting element can be correspondingly engaged into the first limiting groove, further ensuring the stability of the connection, preventing the bushing from moving along its own axial direction and preventing relative rotation with the pump shaft. Furthermore, removing the first limiting part from the first limiting groove disengages the bushing from the locking element, thereby indirectly separating the pump shaft from the impeller. The entire device is not only simple in structure but also easy to assemble and disassemble, greatly improving the efficiency of subsequent maintenance. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the locking device provided by this utility model;
[0022] Figure 2 This is a structural schematic diagram of the limiting component provided by this utility model;
[0023] Figure 3This is a structural schematic diagram of the locking component provided by this utility model;
[0024] Figure 4 This is a schematic diagram of the anti-reverse component provided by this utility model.
[0025] In the picture:
[0026] 10. Bushing; 11. First limiting groove;
[0027] 20. Locking element; 21. Second limit groove; 22. Anti-reverse groove;
[0028] 30. Limiting component; 31. First limiting part; 32. Second limiting part; 33. Mounting hole;
[0029] 40. Return-proof component; 41. First subject; 42. Second subject;
[0030] 100. Pump shaft;
[0031] 200. Transmission key. Detailed Implementation
[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.
[0033] 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.
[0034] 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.
[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0036] This embodiment provides a locking device, such as... Figures 1-3 As shown, this device is used to lock the impeller and the pump shaft 100. The locking device specifically includes a bushing 10, a locking member 20, and a limiting member 30; the bushing 10 is disposed on the outer periphery of the pump shaft 100 and connected to the impeller, and the bushing 10 is provided with a first limiting groove 11 along the axial direction; the locking member 20 is locked on the outer periphery of the pump shaft 100 and is located at the end of the bushing 10 away from the impeller; the limiting member 30 is disposed between the bushing 10 and the locking member 20, and a first limiting part 31 protrudes from one side of the limiting member 30, the first limiting part 31 is correspondingly engaged in the first limiting groove 11, and the other side of the limiting member 30 is connected to the locking member 20 so that the bushing 10 cannot move along its own axial direction.
[0037] When using this locking device, the bushing 10 is connected to the impeller, while the locking member 20 is fixed to the outer periphery of the pump shaft 100 and can be connected to the bushing 10 through the limiting member 30, thereby achieving indirect fixation between the impeller and the pump shaft 100. Simultaneously, the first limiting part 31 of the limiting member 30 can be correspondingly engaged into the first limiting groove 11, further ensuring the stability of the connection, preventing the bushing 10 from moving along its own axial direction and preventing relative rotation with the pump shaft 100. Furthermore, removing the first limiting part 31 from the first limiting groove 11 disengages the bushing 10 from the locking member 20, thereby indirectly disengaging the pump shaft 100 from the impeller. The entire device is not only simple in structure but also easy to assemble and disassemble, greatly improving the efficiency of subsequent maintenance.
[0038] It should be noted that, as Figure 1 As shown, the impeller inner hole and the pump shaft 100 are fitted with a clearance fit using an H7 / h6 tolerance. The impeller can be connected to the end of the first limiting groove 11 of the bushing 10 away from the first limiting part 31 via the transmission key 200. The bushing 10 and the pump shaft 100 are also fitted with a clearance fit using an H7 / h6 tolerance. The locking member 20 is fixed on the pump shaft 100 and connected to the bushing 10 via the limiting member 30. Therefore, after the bushing 10 and the locking member 20 are stably connected, the pump shaft 100 and the impeller can also form a stable connection relationship, which is also convenient for disassembly and assembly.
[0039] Specifically, such as Figures 1-3As shown, the locking member 20 has a second limiting groove 21 on the side near the bushing 10, and the limiting member 30 has a second limiting part 32 on the side opposite to the first limiting part 31. The second limiting part 32 can be correspondingly engaged and limited within the second limiting groove 21. The engagement of the second limiting part 32 with the second limiting groove 21 not only improves the stability of the connection between the locking member 20 and the limiting member 30, but also facilitates disassembly, greatly improving the efficiency and convenience of later maintenance.
[0040] In addition, such as Figure 1 and Figure 2 As shown, the first limiting groove 11 is circumferentially disposed around the inner circumference of the bushing 10, and the locking member 20 is provided with a plurality of second limiting grooves 21 spaced circumferentially on the side near the bushing 10. Figure 2 Only one second limiting groove 21 is shown in the diagram. This design improves the ease of installation, allowing the first limiting part 31 to be installed into the first limiting groove 11 more easily and quickly, and ensuring that the second limiting part 32 can be quickly engaged into the second limiting groove 21 regardless of the angle to which the locking member 20 is rotated.
[0041] To further improve the stability of the connection, both the first limiting part 31 and the second limiting part 32 are provided with multiple ( ) at intervals along the circumference of the limiting member 30. Figure 3 Only one first limiting part 31 and one second limiting part 32 are shown in the diagram. Since the first limiting groove 11 is an annular groove, multiple first limiting parts 31 can be simultaneously engaged in the first limiting groove 11. At the same time, the second limiting groove 21 is arranged along the circumference of the locking member 20, so the second limiting part 32 can be correspondingly engaged in multiple second limiting grooves 21, thereby further improving the stability of the connection and ensuring the safety of the operation.
[0042] To improve ease of installation, such as Figure 2 As shown, the limiting member 30 is provided with a mounting hole 33, through which the limiting member 30 can be sleeved onto the outer periphery of the pump shaft 100. Multiple first limiting parts 31 and multiple second limiting parts 32 are all located on the outer periphery of the mounting hole 33. In this structure, the limiting member 30 can be sleeved onto the pump shaft 100 simply through the mounting hole 33. Simultaneously, the first limiting parts 31 and second limiting parts 32 are located on opposite sides of the limiting member 30, and then respectively engage with the first limiting groove 11 and the second limiting groove 21. The structure is simple and the operation is easy and convenient.
[0043] To prevent relative rotation between the locking element 20 and the pump shaft 100, such as Figure 1 and Figure 4As shown, the locking device also includes a stop member 40, which is disposed on the side of the locking member 20 away from the limiting member 30, so that the locking member 20 cannot move away from the limiting member 30. This arrangement allows the stop member 40 to abut against the locking member 20, while the other side is connected to the limiting member 30. Therefore, the locking member 20 cannot move axially along the pump shaft 100, thus ensuring good performance.
[0044] In addition, such as Figure 4 As shown, the anti-reverse component 40 includes a first body 41 and a second body 42 connected to each other. The first body 41 can be snapped into a slot on the outer periphery of the pump shaft 100, and the second body 42 is connected to the locking component 20. This configuration is not only simple in structure and easy to install, but also strengthens the connection between the locking component 20 and the pump shaft 100, ensuring the driving effect.
[0045] Specifically, such as Figure 1 As shown, the locking member 20 has a retaining groove 22 on the side opposite to the bushing 10, and the second body 42 can be correspondingly engaged with the retaining groove 22. This design is not only simple in structure, but also extremely convenient to disassemble and assemble, which helps to reduce the difficulty of later maintenance, while also ensuring a stable connection.
[0046] Furthermore, the first body 41 and the second body 42 are perpendicular to each other and are integrally formed. Since the locking member 20 is sleeved on the outer periphery of the pump shaft 100, the radial direction of the locking member 20 is perpendicular to the axial direction of the pump shaft 100. Therefore, the connection angle between the first body 41 and the second body 42 coincides with the connection angle between the locking member 20 and the pump shaft 100, thereby improving the ease of installation. The integrally formed structure not only facilitates processing but also improves the connection strength between the first body 41 and the second body 42, effectively preventing breakage due to fatigue at the connection points.
[0047] Multiple anti-reverse grooves 22 are provided at intervals along the circumference of the locking member 20, and multiple anti-reverse members 40 are also provided accordingly. Multiple anti-reverse members 40 can improve the stability of the locking member 20, and also make the locking member 20 evenly stressed, avoiding breakage due to excessive local stress, thus ensuring service life.
[0048] Finally, the usage process of the locking device in this embodiment is explained with reference to the accompanying drawings:
[0049] First, make a clearance fit between the impeller inner hole and the pump shaft 100, and make a clearance fit between the shaft sleeve 10 and the pump shaft 100;
[0050] Next, the multiple first limiting parts 31 of the limiting member 30 are correspondingly snapped into the first limiting groove 11, the multiple second limiting parts 32 are correspondingly snapped into the multiple second limiting grooves 21 of the locking member 20, and the transmission key 200 is connected to the first limiting groove 11 of the bushing 10, thereby ensuring that the bushing 10 and the pump shaft 100 cannot rotate relative to each other.
[0051] Finally, the first body 41 of the multiple anti-reverse parts 40 is snapped into the slot on the pump shaft 100, and the second body 42 is snapped into the multiple anti-reverse grooves 22 of the locking part 20, so that the locking part 20 cannot rotate out of the pump shaft 100.
[0052] In summary, the locking device in this embodiment not only ensures a stable connection between the impeller and the pump shaft 100, but also enables quick assembly and disassembly, reducing the difficulty of later maintenance and improving operational efficiency.
[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A locking device for locking an impeller to a pump shaft (100), characterized in that include: A bushing (10) is disposed on the outer periphery of the pump shaft (100) and connected to the impeller. The bushing (10) is provided with a first limiting groove (11) along the axial direction. A locking element (20) is locked to the outer periphery of the pump shaft (100) and is located at the end of the bushing (10) away from the impeller; A limiting member (30) is disposed between the bushing (10) and the locking member (20). A first limiting part (31) protrudes from one side of the limiting member (30), and the first limiting part (31) is correspondingly engaged in the first limiting groove (11). The other side of the limiting member (30) is connected to the locking member (20) so that the bushing (10) cannot move along its own axial direction.
2. The locking device of claim 1, wherein The locking member (20) is provided with a second limiting groove (21) on the side near the bushing (10), and the limiting member (30) is provided with a second limiting part (32) on the side away from the first limiting part (31). The second limiting part (32) can be correspondingly locked and limited in the second limiting groove (21).
3. The locking device of claim 2, wherein, The first limiting groove (11) is arranged around the inner circumference of the bushing (10), and the locking member (20) is provided with a plurality of second limiting grooves (21) at intervals along the circumferential direction on the side near the bushing (10).
4. The locking device of claim 3, wherein Both the first limiting part (31) and the second limiting part (32) are provided in multiples at intervals along the circumference of the limiting member (30).
5. The locking device of claim 4, wherein, The limiting member (30) is provided with a mounting hole (33), and the limiting member (30) can be sleeved on the outer periphery of the pump shaft (100) through the mounting hole (33). A plurality of first limiting parts (31) and a plurality of second limiting parts (32) are all provided on the outer periphery of the mounting hole (33).
6. The locking device of claim 1, wherein The locking device further includes a stop member (40), which is disposed on the side of the locking member (20) away from the limiting member (30) so that the locking member (20) cannot move away from the limiting member (30).
7. The locking device of claim 6, wherein The anti-reverse component (40) includes a first body (41) and a second body (42) connected to each other. The first body (41) can be snapped into a slot on the outer periphery of the pump shaft (100), and the second body (42) is connected to the locking component (20).
8. The locking device of claim 7, wherein, The locking member (20) has a backstop groove (22) on the side away from the bushing (10), and the second body (42) can be correspondingly engaged with the backstop groove (22).
9. The locking device of claim 8, wherein, The first body (41) and the second body (42) are perpendicular to each other and are integrally formed.
10. The locking device of claim 8, wherein, The anti-reverse groove (22) is provided in multiple intervals along the circumference of the locking member (20), and the anti-reverse member (40) is also provided in multiple corresponding intervals.