Centrifugal impeller locking and dismounting device

Abstract

The utility model provides a centrifugal impeller locking and dismounting device, which belongs to the field of centrifugal impeller devices and comprises a pull rod, a hollow hydraulic jack, a centrifugal impeller and a main shaft, one end of the pull rod is connected with one end of the main shaft in a threaded manner, the hollow hydraulic jack is arranged below the pull rod, and the centrifugal impeller is sleeved on the main shaft. The impeller locking nut is in threaded connection with one end of the main shaft, and the impeller locking nut is arranged between the pull rod and the impeller. The tool is simple in structure, high in universality, capable of guaranteeing that the impeller and the main shaft are not damaged in the operation process, easy to operate and capable of well guaranteeing the assembly precision.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal impeller devices, in particular to a centrifugal impeller locking and disassembly device. Background Art

[0002] At present, there are many ways to assemble centrifugal impellers, such as plane connection, vertical key connection, end face tooth connection and triangular shaft connection. When the torque required for driving the impeller is not large, most of them use simple plane connection. When using plane connection, it is necessary to ensure accurate locking force to ensure that the friction torque of the cross section can meet the requirements of the impeller. At present, in order to achieve this purpose, a torque wrench is used to achieve the required tightening torque. The use of a torque wrench will cause certain damage to the impeller and the main shaft, and it is inconvenient to operate.

[0003] Existing centrifugal impeller locking devices are relatively complex, and most of them are not universal. They are all special devices, and the cost of one device is relatively high. In addition, if a torque wrench is used to complete the tightening torque, the damage to the shaft is very large, which will cause the shaft to bend, affect the coaxiality of the shaft, and ultimately affect the quality of the product; at the same time, the operation is also very inconvenient, and a specific tool is required to fix the main shaft to achieve the tightening torque of the impeller locking nut. Therefore, a centrifugal impeller locking and disassembly device is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a centrifugal impeller locking and disassembly device to solve the technical problem that the existing centrifugal impeller locking device is not universal. The utility model has a simple structure and strong universality, ensures that the impeller and the main shaft are not damaged during operation, is easy to operate, and has high assembly accuracy.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A centrifugal impeller locking and disassembly device comprises a pull rod, a hollow hydraulic jack, a centrifugal impeller and a main shaft, one end of the pull rod is connected to one end of the main shaft by a screw connection, the hollow hydraulic jack is arranged below the pull rod, the centrifugal impeller is sleeved on the main shaft, the impeller locking nut is threadedly connected to one end of the main shaft, and the impeller locking nut is arranged between the pull rod and the impeller.

[0007] Furthermore, a threaded hole is provided at one end of the pull rod, and one end of the main shaft is connected to the threaded hole of the pull rod.

[0008] Furthermore, an action ring is provided on one end of the pull rod, the action ring is sleeved on the pull rod, and one end of the action ring extends to the impeller locking nut.

[0009] Furthermore, an adjusting nut is provided at the other end of the pull rod, and the adjusting nut is threadedly connected to the pull rod.

[0010] Furthermore, the hollow hydraulic jack is arranged in contact with the adjusting nut and the action ring respectively.

[0011] Furthermore, a gap is provided between the pull rod and the impeller locking nut.

[0012] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0013] The utility model has a simple structure and strong versatility, can ensure that the impeller and the main shaft are not damaged during operation, is easy to operate, and can well ensure good assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the centrifugal impeller locking and disassembly device of the utility model.

[0015] In the attached drawings, 1-pull rod, 2-adjusting nut, 3-hollow hydraulic jack, 4-acting ring, 5-impeller locking nut, 6-centrifugal impeller, 7-main shaft. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling readers to have a thorough understanding of one or more aspects of the utility model, and these aspects of the utility model can be realized even without these specific details.

[0017] like Figure 1As shown, a centrifugal impeller locking and disassembly device includes a tie rod 1, a hollow hydraulic jack 3, a centrifugal impeller 6 and a main shaft 7. One end of the tie rod 1 is connected to one end of the main shaft 7 by threading. The hollow hydraulic jack 3 is arranged below the tie rod 1. The centrifugal impeller 6 is sleeved on the main shaft 7. The impeller locking nut 5 is threadedly connected to one end of the main shaft 7, and the impeller locking nut 5 is arranged between the tie rod 1 and the centrifugal impeller 6. The impeller locking nut 5 can be tightened by hand. A threaded hole is arranged at one end of the tie rod 1, and one end of the main shaft 7 is connected to the threaded hole of the tie rod 1. An action ring 4 is arranged on one end of the tie rod 1. The action ring 4 is sleeved on the tie rod 1, and one end of the action ring 4 extends to the impeller locking nut 5. The action ring 4 transmits force to the impeller locking nut 5, so that the impeller locking nut 5 locks the centrifugal impeller 6. A rectangular notch is arranged at one end of the action ring 4 to facilitate tightening the impeller locking nut 5. The other end of the tie rod 1 is provided with an adjusting nut 2, and the adjusting nut 2 is threadedly connected to the tie rod 1. The hollow hydraulic jack 3 is respectively provided in contact with the adjusting nut 2 and the action ring 4, and the hollow hydraulic jack 3 transmits the force to the tie rod 1 through the adjusting nut 2 and the action ring 4, respectively. The tie rod 1 transmits the force to the main shaft 7, and the action ring 4 transmits the force to the impeller locking nut 5, and the impeller locking nut 5 locks the impeller 6. A gap is provided between the tie rod 1 and the impeller locking nut 5 to ensure that the impeller locking thread nut 5 can be easily screwed. The impeller locking nut 5 is provided with a straight knurl, which is convenient for using a flat-blade screwdriver to lock the impeller locking nut 5 from the rectangular notch of the action ring 4. The hollow hydraulic jack 3 is a hollow hydraulic jack in the prior art, and a hollow hydraulic jack of model RCH-2050 can be selected. The stretching capacity of the hollow hydraulic jack is fully utilized, and it is suitable for locking and disassembling impellers of different models. It does not need to customize special hydraulic tooling for different models. It only needs to adjust a few simple parts such as the pull rod 1 and the action ring 4. The required cost is low, and it is suitable for cleaning the inside of non-standard or multi-variety, small batch and complex parts. The utility model has a simple structure and strong versatility, can ensure that the impeller and the main shaft are not damaged during operation, is easy to operate, and can well ensure assembly accuracy.

[0018] How it works

[0019] When the centrifugal impeller 6 is locked, operate the hollow hydraulic jack 3 to increase the pressure to the actual required pressure, ensure the stability of the pressure, and then tighten the impeller locking nut 5 to ensure that the impeller locking nut 5 and the cross section of the centrifugal impeller 6 are tightly fitted. When a 0.01mm feeler gauge cannot be inserted, it means that the impeller locking nut 5 is tightly fitted. After the inspection is completed, the pressure of the hollow hydraulic jack 3 can be unloaded, and the adjusting nut 2, the action ring 4 and the pull rod 1 device can be removed;

[0020] When disassembling the centrifugal impeller 6, clean the threads at the end of the main shaft 7 and the end face of the centrifugal impeller 6 before disassembly, and after confirmation, assemble the pull rod 1, adjusting nut 2, action ring 4 and hollow hydraulic jack 3 in sequence, and then operate the hollow hydraulic jack 3 to remove the impeller locking nut 5, so as to remove the centrifugal impeller 6. In order to facilitate the easy twisting of the impeller locking nut, the pressure during disassembly needs to be about 5Mpa greater than the pressure during assembly.

[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A centrifugal impeller locking and disassembly device, characterized in that: The invention comprises a pull rod (1), a hollow hydraulic jack (3), a centrifugal impeller (6) and a main shaft (7), wherein one end of the pull rod (1) is connected to one end of the main shaft (7) by a thread, the hollow hydraulic jack (3) is arranged below the pull rod (1), the centrifugal impeller (6) is sleeved on the main shaft (7), the impeller locking nut (5) is connected to one end of the main shaft (7) by a thread, and the impeller locking nut (5) is arranged between the pull rod (1) and the centrifugal impeller (6).

2. A centrifugal impeller locking and disassembly device according to claim 1, characterized in that: One end of the pull rod (1) is provided with a threaded hole, and one end of the main shaft (7) is connected to the threaded hole of the pull rod (1).

3. A centrifugal impeller locking and disassembly device according to claim 1, characterized in that: An action ring (4) is provided on one end of the pull rod (1), the action ring (4) is sleeved on the pull rod (1), and one end of the action ring (4) extends to the impeller locking nut (5).

4. A centrifugal impeller locking and disassembly device according to claim 1, characterized in that: The other end of the pull rod (1) is provided with an adjusting nut (2), and the adjusting nut (2) is threadedly connected to the pull rod (1).

5. A centrifugal impeller locking and disassembly device according to claim 1, characterized in that: The hollow hydraulic jack (3) is arranged in contact with the adjusting nut (2) and the action ring (4) respectively.

6. A centrifugal impeller locking and disassembly device according to claim 1, characterized in that: A gap is provided between the pull rod (1) and the impeller locking nut (5).

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