Dynamic balance and overspeed test tool

Abstract

The utility model relates to a dynamic balance and overspeed test tool, which comprises a tool body which is arranged on a roller carrier of a dynamic balancing machine and is used for carrying out dynamic balance and overspeed test on an impeller, the tool body consists of an adapter, a connecting screw rod and a shaft sleeve, after the connecting screw rod penetrates through an inner hole of the impeller, the impeller is arranged at the middle position of the connecting screw rod, and the shaft sleeve is connected with the adapter. An adjusting device is further arranged on the connecting screw rod and used for being matched with impellers of different lengths, one end of the connecting screw rod is inserted into a mounting hole correspondingly formed in the adapter, the adapter and the impellers are positioned through a first positioning spigot, and a shaft sleeve is installed on the outer side of the other end of the connecting screw rod and fixed through a fixing device. A second positioning spigot with a threaded hole is further formed in the side, away from the impeller, of the adapter. The utility model has the advantages of simple and convenient structure, convenience in disassembly, universality interchange and good practical application condition, shortens the production cycle, increases the tooling universality and saves the production cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of impeller test tooling and relates to a dynamic balance and overspeed test tooling. Background Art

[0002] In conventional geared turbine compressors, the impeller and shaft are connected by connecting the rotating impeller and the transmission shaft at their end faces. A connecting pin in the form of a saddle is embedded in the connecting surface to transmit the rotational torque. The rotating impeller and the transmission shaft are fixedly connected by tension bolts.

[0003] During the production cycle, the impeller needs to be dynamically balanced at low speed first, and then the overspeed test. Because the impeller needs to be connected and installed with the corresponding drive shaft for low-speed dynamic balancing before it can be placed on the dynamic balancing machine for low-speed dynamic balancing and weight removal. After that, after removing the drive shaft, the single-stage impeller is connected through the overspeed turnbuckle fixture for overspeed testing. Since the processing schedule of the impeller and the drive shaft are not synchronized, it will seriously affect the production progress. At the same time, the overspeed test uses a turnbuckle structure, which uses the centrifugal force of the turnbuckle device to tighten the inner hole of the impeller, thereby driving the impeller to rotate. Since the design and production of the turnbuckle is not only expensive and complex to process, but also the turnbuckle overspeed fixture and the impeller are not dynamically balanced, which may cause imbalance, affecting the success rate of the overspeed test.

[0004] Therefore, a dynamic balancing and overspeed test fixture is designed to overcome the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a dynamic balancing and overspeed test fixture which has a simple structure, is firm and reliable, and operates stably.

[0006] The utility model is realized through the following technical solutions: a dynamic balancing and overspeed test tool, including a tool body installed on a dynamic balancing machine roller frame for performing dynamic balancing and overspeed tests on an impeller, the tool body consisting of an adapter, a connecting screw and a sleeve, after the connecting screw passes through the inner hole of the impeller, the impeller is installed in the middle position of the connecting screw, and an adjustment device is also provided on the connecting screw for adapting to impellers of different lengths, one end of the connecting screw is inserted into the corresponding mounting hole on the adapter, and the adapter is positioned with the impeller through a first positioning stop, and a sleeve is installed on the outside of the other end of the connecting screw and fixed by a fixing device, thereby ensuring that the impeller installed on the connecting screw performs dynamic balancing operation, and a second positioning stop with a threaded hole is also provided on the side of the adapter away from the impeller for connecting to the overspeed bench connecting shaft to perform overspeed testing.

[0007] Preferably, a connecting head with a diameter smaller than that of the connecting screw is provided at the end of the connecting screw away from the adapter, a thread is provided on the outside of the connecting head for connecting to the hydraulic tensioning device, and a fixing device is installed on the outside of the end of the connecting screw close to the connecting head.

[0008] Preferably, the fixing device is a locking nut, and a third positioning stop that matches the connecting screw is provided on the sleeve. The locking nut is sleeved on the connecting screw and is positioned by the third positioning stop.

[0009] As a preference, the outer circle of the adapter is provided with a shaft diameter of the same size as the outer circle of the sleeve, which is used as a bearing stop for tooling during low-speed dynamic balancing.

[0010] Preferably, the adjusting device is an adjusting gasket provided on the connecting screw and located on at least one side of the impeller.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1) There is no need to wait for the product drive shaft to be used as the core shaft for dynamic balancing. After the impeller finishing is completed, the impeller dynamic balancing and overspeed test can be carried out, which shortens the product production cycle;

[0013] 2) For the overspeed test of the impeller with the integral tooling, if the overspeed test fails, there is no need to dismantle the impeller, and the overall low-speed dynamic balancing can be performed again, which is convenient to operate;

[0014] 3) In terms of versatility, the overall tooling adopts an adapter, connecting screw, and replaceable adjustment gasket structure, which can be used for different positioning joints and impellers of different lengths, greatly improving the versatility of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 .

[0016] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0018] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "horizontal", and "vertical" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or original referred to must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0019] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1-2 As shown, a dynamic balancing and overspeed test fixture includes a fixture body installed on a dynamic balancing machine roller frame for performing dynamic balancing and overspeed tests on an impeller 4, the fixture body consisting of an adapter 1, a connecting screw 2 and a sleeve 3. After the connecting screw 2 passes through the inner hole of the impeller 4, the impeller 4 is installed in the middle position of the connecting screw 2, and an adjustment device is also provided on the connecting screw 2 to adapt to impellers 4 of different lengths. One end of the connecting screw 2 is inserted into the corresponding mounting hole on the adapter 1, and the adapter 1 is positioned with the impeller 4 through a first positioning stop, and the other end of the connecting screw 2 is installed with a sleeve 3 on the outside and fixed by a fixing device, thereby ensuring that the impeller 4 installed on the connecting screw 2 is dynamically balanced. A second positioning stop with a threaded hole is also provided on the side of the adapter 1 away from the impeller 4, which is used to connect with the overspeed bench connecting shaft 5 to perform an overspeed test.

[0020] The end of the connecting screw 2 away from the adapter 1 is provided with a connecting head 6 with a diameter smaller than the connecting screw 2, and a thread is provided on the outside of the connecting head 6 for connecting to the hydraulic tensioning device 7, and a fixing device is installed on the outside of the end of the connecting screw 2 close to the connecting head 6.

[0021] The fixing device is a lock nut 8, and the sleeve is provided with a third locating stop that matches the connecting screw. The lock nut 8 is mounted on the connecting screw 2 and positioned by the third locating stop. The outer diameter of the adapter 1 is provided with a shaft diameter of the same size as the outer diameter of the sleeve 3, which serves as a bearing stop for the tooling during low-speed dynamic balancing. The adjustment device is an adjustment shim 9 provided on the connecting screw 2 on at least one side of the impeller.

[0022] The working process of this utility model is as follows:

[0023] Connect the adapter to the connecting screw, then pass the screw through the inner hole of the impeller, use the first positioning stop of the adapter to position it with the impeller, install the adjustment gasket of the corresponding size, and then install the shaft sleeve. After tightening the locking nut, use the hydraulic device (conventional hydraulic tool) to stretch the connecting screw and tighten the locking nut. Place the shaft diameters on both sides of the tooling on the roller frame of the dynamic balancing machine for dynamic balancing. After the dynamic balancing operation is completed, position the second positioning stop on the overall tooling adapter with the connecting rod notch of the overspeed testing machine to perform the overspeed test.

[0024] The dynamic balancing and overspeed test fixture of this utility model can well replace the drive shaft and turnbuckle overspeed fixture. The impeller is tightened by the tightening bolt using the hydraulic device to perform low-speed dynamic balancing. It can also be used as a fixture for overspeed testing on an overspeed test bench. The impeller dynamic balancing and overspeed tests can be performed through the single-stage impeller overall dynamic balancing overspeed fixture:

[0025] The utility model does not need to wait for the product drive shaft to act as the core shaft for the dynamic balancing operation. After the impeller fine processing is completed, the impeller dynamic balancing and overspeed test can be carried out, thereby shortening the product production cycle. For the impeller overspeed test using the integral tooling, if the overspeed is unsuccessful, there is no need to disassemble the impeller, and the low-speed dynamic balancing can be performed again as a whole, which is convenient to operate. As for versatility, the integral tooling adopts an adapter, a connecting screw, and a replaceable adjustment pad structure, which can be suitable for impellers with different positioning joints and different lengths, thereby greatly improving the versatility of the tooling.

[0026] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this utility model shall be covered by the claims of this utility model.

Claims

1. A dynamic balancing and overspeed test fixture, comprising a fixture body mounted on a dynamic balancing machine roller frame for performing dynamic balancing and overspeed tests on an impeller (4), characterized in that: The tooling body is composed of an adapter (1), a connecting screw (2) and a sleeve (3). After the connecting screw (2) passes through the inner hole of the impeller (4), the impeller (4) is installed in the middle position of the connecting screw (2), and an adjustment device is provided on the connecting screw (2) for adapting to impellers (4) of different lengths. One end of the connecting screw (2) is inserted into the corresponding mounting hole on the adapter (1), and the adapter (1) is positioned with the impeller (4) through a first positioning stop. The other end of the connecting screw (2) is provided with a sleeve (3) on the outside and fixed by a fixing device, thereby ensuring that the impeller (4) installed on the connecting screw (2) is dynamically balanced. A second positioning stop with a threaded hole is provided on the side of the adapter (1) away from the impeller (4) for connecting with the overspeed table connecting shaft (5) to perform an overspeed test.

2. The dynamic balancing and overspeed test fixture according to claim 1, characterized in that: The end of the connecting screw (2) away from the adapter (1) is provided with a connecting head (6) having a diameter smaller than that of the connecting screw (2), a thread is provided on the outside of the connecting head (6) for connecting to a hydraulic tensioning device (7), and a fixing device is installed on the outside of the end of the connecting screw (2) close to the connecting head (6).

3. The dynamic balancing and overspeed test fixture according to claim 2, characterized in that: The fixing device is a locking nut (8), and a third positioning stop that matches the connecting screw is provided on the shaft sleeve. The locking nut (8) is sleeved on the connecting screw (2) and is positioned by the third positioning stop.

4. The dynamic balancing and overspeed test fixture according to claim 2 or 3, characterized in that: The outer circle of the adapter (1) is provided with a shaft diameter of the same size as the outer circle of the shaft sleeve (3), which is used as a bearing stop for tooling during low-speed dynamic balancing.

5. The dynamic balancing and overspeed test fixture according to claim 1, characterized in that: The regulating device is an adjusting washer (9) provided on the connecting screw (2) and located on at least one side of the impeller.

Images