Impeller mounting structure easy to disassemble

Abstract

The utility model relates to the field of impellers, and particularly discloses an easy-to-disassemble impeller mounting structure which comprises a high-speed shaft and an impeller, an impeller matching hole matched with the high-speed shaft in an inserted mode is formed in the impeller, a positioning pin hole is formed between the high-speed shaft and the impeller, a positioning pin is connected into the positioning pin hole, and the positioning pin is used for limiting the impeller. The high-speed shaft is provided with a locking piece used for limiting the positioning pin, and the end face of the impeller is provided with a dismounting hole. The device has the advantages that the reproducibility of the high-speed shaft assembly after dynamic balance disassembly is guaranteed, the high-speed shaft assembly is stable in actual operation and small in vibration, and meanwhile disassembly and maintenance of the damaged impeller are facilitated.

Description

Technical Field

[0001] The present application relates to the field of impellers, and in particular to an easily detachable impeller mounting structure. Background Art

[0002] A high-speed rotating centrifugal air compressor has a high driving speed, so the stable operation of the high-speed shaft assembly is very important. Usually, the high-speed shaft will be calibrated on a dynamic balancing machine to ensure good stability in actual operation. However, it is also necessary to ensure that the actual assembly is consistent with the calibration effect on the dynamic balancing machine, and it must be reproducible. If the high-speed shaft is not reproducible during dynamic balancing and assembly, it will cause the high-speed shaft assembly to vibrate greatly when rotating at high speed, and even damage the machine. Therefore, the impeller generally has a relatively large interference with the high-speed gear shaft. If the interference is insufficient, the impeller will rotate with the shaft. However, this impeller structure makes it difficult to disassemble the impeller. If a component on the shaft system is damaged, the entire shaft system must be replaced, which will also increase the cost of maintenance.

[0003] With regard to the above-mentioned related technologies, after the high-speed shaft is assembled with the shrink-fit impeller, the interference amount is too large and it is not easy to disassemble. Maintenance requires the replacement of the entire high-speed shaft, which is costly and needs to be improved urgently. Summary of the invention

[0004] An easily detachable impeller mounting structure enables the high-speed shaft assembly to be reproducible after dynamic balancing and during assembly, so that the high-speed shaft assembly is stable in actual operation with low vibration, and is also convenient for disassembly and repair after the impeller is damaged. The easily detachable impeller mounting structure provided in this application adopts the following technical solution:

[0005] A removable impeller installation structure includes a high-speed shaft and an impeller. The impeller is provided with an impeller mating hole for plugging with the high-speed shaft. A positioning pin hole is provided between the high-speed shaft and the impeller. A positioning pin is inserted into the positioning pin hole. The positioning pin is used to limit the impeller. The high-speed shaft is provided with a locking piece for limiting the positioning pin.

[0006] By adopting the above technical scheme, during installation, the impeller is inserted into the high-speed shaft, and then the locating pin is inserted into the locating pin hole, so as to realize the locking of the impeller, so that the impeller and the high-speed shaft rotate synchronously, and then the locking piece is used to fix the locating pin, so as to reduce the detachment of the locating pin in the locating pin hole, so as to complete the locking of the impeller; by adopting such a design, the locating pin abuts against the locating pin hole, and when the side wall of the locating pin hole abuts against the locating pin hole, the direction of the force at the abutting position is along the tangential direction of the impeller, and when the locating pin is squeezed, the locating pin is squeezed close to the high-speed shaft, and when acting on the locating pin, the supporting force of the locating pin is set along its radial direction, and the locating pin is relatively abutted against the side of the locating pin hole located on the high-speed shaft, so that the pressure generated by the impeller can act on the high-speed shaft more evenly, and the locating pin can act on the high-speed shaft more evenly, reducing the damage to the impeller, the high-speed shaft and the locating pin, ensuring the service life of the impeller, and improving the stability of the impeller fixed on the high-speed shaft.

[0007] Optionally, a locking gasket is sleeved on the locking member, the locking gasket abuts against the impeller, a positioning block is provided on the side of the locking gasket close to the high-speed shaft, and a positioning pin groove is formed on the side of the impeller and the high-speed shaft close to the locking member to engage with the positioning block.

[0008] By adopting the above technical solution, the high-speed shaft assembly can be reproducible after dynamic balancing and during assembly, so that the high-speed shaft assembly can be stable in actual operation with small vibration, and it is also convenient for disassembly and maintenance after the impeller is damaged.

[0009] Optionally, a locking slot which is plug-fitted with the positioning pin is provided on a side of the positioning block close to the high-speed shaft.

[0010] By adopting the above technical solution, the use of the locking slot can more stably limit the position of the locating pin, and the cooperation with the locking piece can make the locating pin stay in the locating pin hole more accurately, thereby improving the stability of using the locating pin.

[0011] Optionally, a chamfer is provided on a side of the locating pin away from the locking gasket, and the chamfer facilitates the locating pin to be inserted into the locating pin hole.

[0012] By adopting the above technical solution, the locating pin can be more conveniently inserted into the locating pin hole, thereby improving the convenience of using the locating pin.

[0013] Optionally, the arc length of the locating pin abutting against the impeller is equal to the arc length of the locating pin abutting against the high-speed shaft.

[0014] By adopting the above technical solution, the outer wall of the locating pin abuts against the impeller and the high-speed shaft respectively, so that the arc lengths abutting against the impeller and the high-speed shaft are the same, thereby making the pressure on the high-speed shaft more even, improving the stability of using the locating pin, and better reducing the deformation of the side with a smaller force surface, thereby increasing the service life of the impeller, the locating pin and the high-speed shaft.

[0015] Optionally, the locking member is a locking bolt, and a threaded hole that matches the thread of the locking bolt is formed on the high-speed shaft, and the rotation direction of the thread in the threaded hole is opposite to the rotation direction of the impeller.

[0016] By adopting the above technical solution, the rotation direction of the threaded hole is opposite to the rotation direction of the impeller, so that the locking bolt can be more tightly tightened in the threaded hole during the rotation of the impeller, thereby improving the stability of the impeller fixation.

[0017] Optionally, the impeller mating hole is interference fit with the high-speed shaft, and a hollow annular groove is provided on the inner wall of the impeller mating hole.

[0018] By adopting the above technical solution, the impeller matching hole and the high-speed shaft have an interference fit, so that the impeller can be more firmly inserted into the high-speed shaft, and the hollow ring groove can reduce the contact between the impeller and the high-speed shaft, so that the impeller can be more conveniently installed and detached from the high-speed shaft, thereby improving the convenience of using the impeller.

[0019] Optionally, a plurality of disassembly holes are provided on a side of the impeller away from the high-speed shaft, and the disassembly holes facilitate disassembly of the impeller.

[0020] By adopting the above technical solution and opening the disassembly hole, a fixed position can be provided for the tool for disassembling the impeller, thereby improving the convenience of disassembling the impeller.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Insert the impeller on the high-speed shaft, and then insert the positioning pin into the positioning pin hole, so as to realize the locking of the impeller, so that the impeller and the high-speed shaft rotate synchronously, and then use the locking piece to fix the positioning pin, so as to reduce the detachment of the positioning pin in the positioning pin hole, so as to complete the locking of the impeller; adopting such a design, the positioning pin abuts in the positioning pin hole, when the side wall of the positioning pin hole abuts on the positioning pin hole, the direction of the force at the abutting position is along the tangential direction of the impeller, when squeezing the positioning pin, the positioning pin is squeezed close to the high-speed shaft, when acting on the positioning pin, the supporting force of the positioning pin is set along its radial direction, and the positioning pin is relatively abutted against the side of the positioning pin hole located on the high-speed shaft, so that the pressure generated by the impeller can act on the high-speed shaft more evenly, and the positioning pin can act on the high-speed shaft more evenly, reducing the damage to the impeller, the high-speed shaft and the positioning pin, ensuring the service life of the impeller, and improving the stability of the impeller fixed on the high-speed shaft;

[0023] 2. The positioning plug cooperates with the positioning pin groove, so that the locking piece can be fixed on the impeller more firmly and accurately, thereby improving the stability of the impeller fixation;

[0024] 3. The use of locking slots can more stably limit the position of the positioning pin, and the use of locking pieces can make the positioning pin stay in the positioning pin hole more accurately, thereby improving the stability of the positioning pin;

[0025] 4. Make the high-speed shaft assembly reproducible after dynamic balancing and during assembly, so that the high-speed shaft assembly is stable in actual operation with small vibration, and it is also convenient for disassembly and maintenance after the impeller is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of an easily detachable impeller mounting structure of an embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0028] Figure 3 It is a front view of an easily detachable impeller mounting structure of an embodiment of the present application.

[0029] Figure numerals: 1. impeller; 2. high-speed shaft; 3. locking gasket; 4. locking piece; 5. threaded hole; 6. impeller matching hole; 7. hollow ring groove; 8. locking slot; 9. positioning block; 11. positioning pin hole; 12. chamfer; 13. positioning pin; 14. disassembly hole; 15. positioning pin slot. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 —3 Provide further details of this application.

[0031] The embodiment of the present application discloses an easily detachable impeller mounting structure.

[0032] Reference Figure 1 and Figure 2 An easily detachable impeller installation structure includes a high-speed shaft 2 and an impeller 1. An impeller mating hole 6 for plugging and mating with the high-speed shaft 2 is provided on the impeller 1. The impeller mating hole 6 is interference-fitted with the high-speed shaft 2. A hollow ring groove 7 is provided on the inner wall of the impeller mating hole 6, so that the impeller 1 can be more firmly fixed on the high-speed shaft 2. An impeller mating hole 6 is provided between the high-speed shaft 2 and the impeller 1. A positioning pin 13 is inserted into the impeller mating hole 6. The positioning pin 13 is used to limit the impeller 1. The arc length of the positioning pin 13 abutting on the impeller 1 is equal to the arc length abutting on the high-speed shaft 2, so that the positioning pin 13 and the force-bearing surface between the impeller 1 and the high-speed shaft 2 are the same, thereby improving the service life of the impeller 1, the positioning pin 13 and the high-speed shaft 2. The high-speed shaft 2 is provided with a locking member 4 for limiting the positioning pin 13. The positioning pin 13 is matched with the impeller matching hole 6. When the impeller 1 abuts against the positioning pin 13, the force is set along the radial direction of the positioning pin 13, so that it can directly act on the high-speed shaft 2, so that the positioning pin 13 can be more stably stressed, reducing the damage to the impeller 1, the high-speed shaft 2 and the positioning pin 13, and ensuring the firmness of the connection between the impeller 1 and the high-speed shaft 2. Figure 3 A plurality of disassembly holes 14 are provided on a side of the impeller 1 away from the high-speed shaft 2 , and the disassembly holes 14 facilitate disassembly of the impeller 1 .

[0033] The locking member 4 is a locking bolt, and a threaded hole 5 is provided on the high-speed shaft 2 to match the locking bolt thread. The internal thread of the threaded hole 5 is opposite to the rotation direction of the impeller 1, so that the locking member 4 can be more firmly fixed on the high-speed shaft 2. A locking washer 3 is sleeved on the locking member 4, and the locking washer 3 abuts against the impeller 1. A positioning plug 9 is integrally formed on the side of the locking washer 3 close to the high-speed shaft 2. A positioning pin groove 15 that is plugged and matched with the positioning plug 9 is formed on the side of the impeller 1 and the high-speed shaft 2 close to the locking member 4, so that the locking washer 3 can be more accurately fixed on the high-speed shaft 2, and the stability of using the locking washer 3 is improved.

[0034] The side of the positioning block 9 close to the high-speed shaft 2 is provided with a locking slot 8 for plugging with the positioning pin 13. The locking slot 8 is a cylindrical slot, and the positioning pin 13 can be limited by the locking slot 8 to improve the positioning accuracy of the positioning pin 13. The side of the positioning pin 13 away from the locking gasket 3 is provided with a chamfer 12, which facilitates the positioning pin 13 to be plugged into the impeller matching hole 6, thereby improving the convenience of installing the positioning pin 13.

[0035] The implementation principle of an easily detachable impeller installation structure in the embodiment of the present application is as follows: during installation, the impeller 1 is plugged onto the high-speed shaft 2, and then the positioning pin 13 is plugged into the impeller matching hole 6, and the locking gasket 3 is plugged into the positioning pin groove 15, and the locking piece 4 is used in cooperation to fix the locking gasket 3, thereby fixing the impeller 1. With such a design, the supporting force of the positioning pin 13 is arranged along its radial direction, and the positioning pin 13 is relatively abutted against the impeller matching hole 6 on one side of the high-speed shaft 2, so that the pressure generated by the impeller 1 can act more evenly on the high-speed shaft 2, and the positioning pin 13 can act more evenly on the high-speed shaft 2, thereby reducing damage to the impeller 1, the high-speed shaft 2 and the positioning pin 13, making the high-speed shaft assembly reproducible after dynamic balancing and during assembly, making the high-speed shaft assembly stable in actual operation with small vibration, and also facilitating disassembly and repair of the impeller after damage.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An easily detachable impeller mounting structure, characterized in that: The invention comprises a high-speed shaft (2) and an impeller (1); the impeller (1) is provided with an impeller matching hole (6) for plugging and matching with the high-speed shaft (2); a positioning pin hole (11) is provided between the high-speed shaft (2) and the impeller (1); a positioning pin (13) is inserted into the positioning pin hole (11); the positioning pin (13) is used to limit the impeller (1); and a locking member (4) for limiting the positioning pin (13) is provided on the high-speed shaft (2).

2. The easily detachable impeller mounting structure according to claim 1, characterized in that: A locking gasket (3) is sleeved on the locking member (4), the locking gasket (3) abuts against the impeller (1), a positioning plug (9) is provided on the side of the locking gasket (3) close to the high-speed shaft (2), and a positioning pin groove (15) for plugging and matching with the positioning plug (9) is formed on the side of the impeller (1) and the high-speed shaft (2) close to the locking member (4).

3. The easily detachable impeller mounting structure according to claim 2, characterized in that: A locking slot (8) which is plugged into and matched with the positioning pin (13) is provided on a side of the positioning plug block (9) close to the high-speed shaft (2).

4. The easily detachable impeller mounting structure according to claim 3, characterized in that: A chamfer (12) is provided on a side of the positioning pin (13) away from the locking gasket (3), and the chamfer (12) facilitates the positioning pin (13) to be inserted into the positioning pin hole (11).

5. The easily detachable impeller mounting structure according to claim 1, characterized in that: The arc length of the positioning pin (13) abutting against the impeller (1) is equal to the arc length of the positioning pin (13) abutting against the high-speed shaft (2).

6. The easily detachable impeller mounting structure according to claim 1, characterized in that: The locking member (4) is a locking bolt, and the high-speed shaft (2) is provided with a threaded hole (5) that matches the thread of the locking bolt, and the internal thread of the threaded hole (5) is in the opposite direction to the rotation direction of the impeller (1).

7. The easily detachable impeller installation structure according to claim 1, characterized in that: The impeller matching hole (6) is interference-fitted with the high-speed shaft (2), and a hollow annular groove (7) is provided on the inner wall of the impeller matching hole (6).

8. The easily detachable impeller mounting structure according to claim 1, characterized in that: A plurality of disassembly holes (14) are provided on a side of the impeller (1) away from the high-speed shaft (2), and the disassembly holes (14) facilitate disassembly of the impeller (1).

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