Novel impeller connecting mechanism
By setting a radial key at the end of the impeller shaft and driving it into the positioning groove inserted into the impeller connection hole through the axial key, the problems of cumbersome operation and insufficient connection force are solved in the traditional impeller and impeller shaft connection method, and the impeller is realized Fast and reliable connection to the impeller shaft.
Patent Information
- Application Number
- CN202421278836.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The connection method between the traditional impeller and the impeller shaft is complicated to operate, and the connection force is only frictional force, and relative rotation is prone to occur when rotating at high speed.
A new type of impeller connection mechanism is designed. The end of the impeller shaft is equipped with radial keys distributed in the radial direction. Driven by the axial key, the end of the radial key is inserted into the positioning groove in the impeller connection hole to achieve locking.
The rapid and convenient connection between the impeller and the impeller shaft is achieved, the reliability of the connection is improved, the operation is simplified, and the workload of assembly/disassembly is reduced.
Smart Images
Figure CN222526556U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a connecting mechanism, in particular to a novel impeller connecting mechanism. Background Art
[0002] The impeller is one of the core components of the water pump. The impeller needs to be installed on the impeller shaft so that the impeller shaft can drive the impeller to rotate, thereby realizing the pumping of the liquid. The traditional way of connecting the impeller and the impeller shaft is to open a connection hole with an inner diameter slightly smaller than the diameter of the impeller shaft on the back side of the impeller, then heat the connection hole of the impeller, and insert the impeller shaft into the connection hole, that is, the impeller and the impeller shaft are connected by interference fit. This connection method is more cumbersome to operate, and the connection force between the impeller and the impeller shaft is only the friction between the two. When rotating at high speed, the impeller may still rotate relative to the impeller shaft.
[0003] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention
[0004] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a novel impeller connecting mechanism which has a simple structure, ingenious design, reasonable layout, can quickly and conveniently connect the impeller and the impeller shaft, and can ensure the reliability of the connection.
[0005] The technical solution of the utility model is: a novel impeller connection mechanism, characterized in that: the connection mechanism includes an impeller shaft 1, the end of the impeller shaft 1 is a connection section 2, and the outer diameter of the connection section 2 is smaller than the outer diameter of the main part of the impeller shaft 1, and a radial key 3 distributed along its radial direction is movably connected in the connection section 2, the two ends of the radial key 3 are ball-shaped, and the length of the radial key 3 is greater than the diameter of the connection section 2, the connection section 2 is inserted into a connection hole opened on the back side of the impeller 4, and a positioning groove 5 is provided on the inner wall of the connection hole.
[0006] The connecting section 2 is also movably connected with an axial key 6, on which a driving groove 7 is provided. The positioning groove 5 and the driving groove 7 are matched with the end of the radial key 3.
[0007] The connection mechanism also includes two half-shaft sleeves 8, which are assembled to form a cylindrical shaft sleeve. The half-shaft sleeves 8 are fixedly connected to the main part of the impeller shaft 1 by bolts, and a sealing ring is also provided between the half-shaft sleeves 8 and the tail end of the impeller 4.
[0008] The edge of the driving groove 7 has a smooth transition.
[0009] When the inner end of the axial key 6 is inserted into the root of the connecting hole, the outer end of the axial key 6 protrudes from the end surface of the back side of the impeller 4 .
[0010] Compared with the prior art, the utility model has the following advantages:
[0011] The impeller connection mechanism of this structural form has a simple structure, ingenious design and reasonable layout. It aims at the problems of cumbersome operation, large workload and easy relative rotation during high-speed rotation in the traditional connection method (interference fit) between the impeller and the impeller shaft. A special structure is designed. A radial key distributed along its radial direction is set at the end of the impeller shaft. The radial key can be driven by the axial key. When the axial key is pushed into place by the sleeve, the end of the radial key will be inserted into the positioning groove opened on the impeller connection hole to achieve locking in the radial direction, and the axial key is locked by the sleeve, thereby achieving a fixed connection between the impeller and the impeller shaft. Compared with the traditional connection method, this connection mechanism is simpler and more convenient to operate, has higher assembly / disassembly efficiency, and also has good connection reliability. At the same time, the manufacturing process of this connection mechanism is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model (non-connected state).
[0013] Figure 2 It is a structural schematic diagram of an embodiment of the utility model (connection state). DETAILED DESCRIPTION
[0014] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 As shown: a new impeller connection mechanism, including an impeller shaft 1, the end of the impeller shaft 1 is a connection section 2, and the outer diameter of the connection section 2 is smaller than the outer diameter of the main part of the impeller shaft 1, and radial keys 3 distributed along the radial direction are movably connected in the connection section 2, both ends of the radial key 3 are ball-shaped, and the length of the radial key 3 is greater than the diameter of the connection section 2, the connection section 2 is inserted into a connection hole opened on the back side of the impeller 4, and a positioning groove 5 is provided on the inner wall of the connection hole.
[0015] The connecting section 2 is also movably connected with an axial key 6, on which a driving groove 7 is provided. The positioning groove 5 and the driving groove 7 are matched with the end of the radial key 3.
[0016] The connection mechanism also includes two half-shaft sleeves 8, which are assembled to form a cylindrical shaft sleeve. The half-shaft sleeves 8 are fixedly connected to the main part of the impeller shaft 1 by bolts, and a sealing ring is also provided between the half-shaft sleeves 8 and the tail end of the impeller 4.
[0017] The edge of the driving groove 7 has a smooth transition.
[0018] When the inner end of the axial key 6 is inserted into the root of the connecting hole, the outer end of the axial key 6 protrudes from the end surface of the back side of the impeller 4 .
[0019] The working process of the new impeller connection mechanism of the embodiment of the utility model is as follows: when the impeller 4 needs to be connected to the impeller shaft 1, the connection section 2 is first inserted into the connection hole opened on the back side of the impeller 4. Since one end of the radial key 3 is located in the driving groove 7 in the initial state, the other end of the radial key 8 does not protrude from the connection section 2 at this time, so the connection section 2 can be smoothly inserted into the connection hole on the impeller 4;
[0020] When the end of the connecting section 2 is inserted to the root of the connecting hole, stop, then take the half-shaft sleeve 8 and buckle it on the remaining part of the impeller shaft 1. During the operation, the half-shaft sleeve 8 is used to push the axial key 6 to move toward the inside of the connecting hole. When the axial key 6 moves, since the edge of the driving groove 7 has a smooth transition and the end of the radial key 3 is in a ball head shape, the driving groove 7 can drive the radial key 3 to move along the radial direction of the connecting section 2. When the axial key 6 moves to the root of the connecting hole, the other end of the radial key 3 is inserted into the positioning groove 5 opened on the inner wall of the connecting hole. At this time, the connecting section 2 and the impeller 4 are connected through the radial key 3;
[0021] At this time, the outer end of the axial key 6 protrudes from the end face on the back side of the impeller 4, and then the two half-shaft sleeves 8 are fixedly connected to the main part of the impeller shaft 1 by bolts, that is, the half-shaft sleeves 8 are used to position the axial key 6. At this time, there are two mutually perpendicular keys in the connection mechanism, among which the radial key 3 realizes the connection between the impeller 4 and the impeller shaft 1, and the axial key 6 realizes the locking of the radial key 3.
[0022] When the impeller 4 needs to be removed from the impeller shaft 1, first remove the half-shaft sleeve 8, then use pliers or other tools to pinch the end of the axial key 6 protruding from the back end face of the impeller 4, and pull it outward. When it is pulled to the position where the driving groove 7 matches the radial key 3, the radial key 3 will move under the action of gravity (the direction of the impeller shaft 1 and the impeller 4 can be adjusted to make the radial key 3 in a vertical state), the radial key 3 falls, and its bottom end falls into the driving groove 7, and the top end falls out of the positioning groove 5. At this time, there is no connection between the impeller 4 and the impeller shaft 1, and the connecting section 2 on the impeller shaft 1 can be pulled out of the connecting hole.
Claims
1. A new impeller connection mechanism, characterized in that: The connecting mechanism comprises an impeller shaft (1), the end of the impeller shaft (1) being a connecting section (2), and the outer diameter of the connecting section (2) being smaller than the outer diameter of the main body of the impeller shaft (1), and radial keys (3) distributed along the radial direction of the connecting section (2) being movably connected therein, the two ends of the radial keys (3) being ball-shaped, and the length of the radial keys (3) being greater than the diameter of the connecting section (2), and the connecting section (2) being inserted into a connecting hole provided on the back side of the impeller (4), and a positioning groove (5) being provided on the inner wall of the connecting hole, An axial key (6) is also movably connected to the connecting section (2), and a driving groove (7) is provided on the axial key (6). The positioning groove (5) and the driving groove (7) are matched with the end of the radial key (3). The connection mechanism further comprises two half-shaft sleeves (8), which are assembled to form a cylindrical shaft sleeve. The half-shaft sleeves (8) are fixedly connected to the main body of the impeller shaft (1) by bolts, and a sealing ring is provided between the half-shaft sleeves (8) and the tail end of the impeller (4). The edge of the driving groove (7) has a smooth transition.
2. The novel impeller connection mechanism according to claim 1 is characterized in that: When the inner end of the axial key (6) is inserted into the root of the connecting hole, the outer end of the axial key (6) protrudes from the end surface on the back side of the impeller (4).