Balancing tool for rotor assembly of air turbine starter

Abstract

The utility model relates to a balancing tool for an air turbine starter rotor assembly, which comprises a bottom plate and a fastening assembly, and is technically characterized in that a lifting cylinder is fixed in the middle of the upper surface of the bottom plate, and a horizontal supporting plate is fixed at the top end of a cylinder rod of the lifting cylinder; the fastening assembly comprises a lower clamping hoop fixed to the middle of the upper surface of the horizontal supporting plate, an upper clamping hoop arranged above the lower clamping hoop and a fastening bolt pair connected between connecting lugs at the two ends of the upper clamping hoop and connecting lugs at the two ends of the lower clamping hoop, two radial threaded holes are symmetrically formed in the upper top face of the upper clamping hoop, and jacking screws are screwed in the radial threaded holes. First limiting vertical plates are arranged on the left edge and the right edge of the bottom plate, first limiting grooves matched with the first limiting vertical plates are formed in the left edge and the right edge of the horizontal supporting plate, second limiting vertical plates are additionally arranged on the left edge and the right edge of the horizontal supporting plate, and second limiting grooves matched with the second limiting plates are formed in the connecting lugs. The tool facilitates the adjustment of the supporting height, is good in supporting stability, and guarantees the dynamic balance test effect of a test piece.

Description

Technical Field

[0001] The utility model relates to the technical field of air turbine starter testing, in particular to a balancing tool for an air turbine starter rotor assembly. Background Art

[0002] Air turbine starters are typically mounted on the rear transmission gearbox of an engine for ground starting, cold transport, and simulated engine starts. They can also operate as power packs to provide energy for ground maintenance. Before using an air turbine starter, the rotor assembly must be dynamically balanced using specialized tooling.

[0003] For example, CN 221260225 U discloses a balancing fixture for an air turbine starter rotor assembly, comprising a support base, a first stopper, a second stopper, and a fastener. The first stopper is disposed on the support base, and the second stopper can be fixed to the first stopper via a fastener. A fixing cavity for fixing the rotor assembly is provided on the contact surfaces of the first and second stopper blocks. This balancing fixture can place the rotor assembly on a dynamic balancing machine and immobilize the outer bearing shaft. The rotor assembly's turbine portion is rotated by blowing air to perform a dynamic balancing test. This is intended to improve the work efficiency of maintenance personnel, reduce the maintenance damage rate, and, to a certain extent, reduce maintenance quality risks and increase safe production operability. However, there is a problem: different outer diameters of the rotor assembly require different support heights, but the fixture's support height remains unchanged. To accommodate different test pieces, the support height needs to be set to an upper limit. However, this high height results in poor fixture support stability, which affects the dynamic balancing test results of the test piece itself. Utility Model Content

[0004] The purpose of the utility model is to provide a balancing tool for an air turbine starter rotor assembly that solves the above-mentioned problems, has a reasonable structure, is reliable in use, is convenient for adjusting the support height, and has good support stability, thereby ensuring the dynamic balance test effect of the test piece.

[0005] The technical solution of the utility model is:

[0006] The top of described sliding panel also is provided with an interlock plate, and the interlock plate is hinged on the base plate, is fixed with a backing pin on the interlock plate, and an end of sliding panel withstands on the backing pin of interlock plate.

[0007] The above-mentioned balancing tool for the air turbine starter rotor assembly, the base plate and the horizontal support plate are respectively in the shape of long strips, the four corners of the base plate are respectively provided with outward-protruding mounting ears, and the outward-protruding mounting ears are provided with mounting holes.

[0008] The above-mentioned balancing tooling for the air turbine starter rotor assembly has four first limiting plates, which are arranged in groups of two and are respectively arranged at the left and right edges of the base plate; the number of the second limiting plates is two, which are respectively arranged at the left and right edges of the horizontal support plate; in the horizontal direction, the second limiting plates are located between the two first limiting plates on the corresponding sides.

[0009] The above-mentioned balancing tool for the air turbine starter rotor assembly, the fastening bolt pair includes a fastening bolt fixed on the horizontal support plate, a limiting boss provided on the fastening bolt, a locking nut and a fixing nut sleeved on the end of the fastening bolt, the fastening bolt passes through the connecting ears of the upper clamp and the lower clamp, and the connecting ears are clamped between the limiting boss and the locking nut.

[0010] The above-mentioned balancing tool for the air turbine starter rotor assembly, the guide assembly consists of a guide sleeve fixed on the base plate, a guide column fixed on the lower surface of the horizontal support plate and inserted into the guide sleeve, and a damping layer is provided on the surface of the guide column.

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

[0012] 1. A lifting cylinder is used to flexibly adjust the support height of the rotor assembly. At the same time, a first limit plate corresponding to the horizontal support plate is provided on the bottom plate to prevent the horizontal support plate from shaking during operation. A second limit plate corresponding to the connecting ear is provided on the horizontal support plate to prevent the upper and lower clamps from shaking during operation, thereby enhancing the support stability of the test piece and ensuring the dynamic balance test effect of the test piece.

[0013] 2. Not only the upper and lower clamps and the fastening bolt pair are used to clamp the test piece, but also two tightening screws are used to pass through the upper clamp to tighten the test piece, which further improves the positioning ability and ensures the dynamic balance test effect of the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 yes Figure 1 Top view of .

[0016] In the figure: 1. Second limiting plate, 2. Fastening bolt, 3. Upper clamp, 4. Jack screw, 5. Fixing nut, 6. Locking nut, 7. Limiting boss, 8. Lower clamp, 9. First limiting plate, 10. Horizontal support plate, 11. Guide column, 12. Guide sleeve, 13. Outward protruding mounting ear, 14. Base plate, 15. Lifting cylinder, 16. Connecting ear, 17. Mounting hole. DETAILED DESCRIPTION

[0017] The utility model is described in detail according to the accompanying drawings.

[0018] like Figure 1 、 Figure 2 As shown, the balancing tool for the air turbine starter rotor assembly includes a base plate 14 and a fastening assembly.

[0019] A lifting cylinder 15 is fixed to the middle of the upper surface of the base plate 14. A horizontal support plate 10 is fixed to the top of the cylinder rod of the lifting cylinder 15. A guide assembly is provided between the lower surface of the horizontal support plate 10 and the upper surface of the base plate 14. The guide assembly consists of a guide sleeve 12 fixed to the base plate 14 and a guide column 11 fixed to the lower surface of the horizontal support plate 10 and inserted into the guide sleeve 12. The surface of the guide column 11 is provided with a damping layer.

[0020] The fastening assembly includes a lower clamp 8 fixed to the middle portion of the upper surface of the horizontal support plate 10, an upper clamp 3 positioned above the lower clamp 8, and a fastening bolt pair connected between the connecting ears at both ends of the upper clamp 3 and the lower clamp 8. Two radial threaded holes are symmetrically provided on the top surface of the upper clamp 3, into which tightening screws 4 are screwed. The fastening bolt pair includes a fastening bolt 2 fixed to the horizontal support plate 10, a limiting boss 7 provided on the fastening bolt 2, a locking nut 6 and a fixing nut 5 fitted over the end of the fastening bolt 2. The fastening bolt 2 passes through the connecting ears 16 of the upper clamp 3 and the lower clamp 8, and the connecting ears 16 are clamped between the limiting boss 7 and the locking nut 6.

[0021] The left and right edges of the bottom plate 14 are provided with first limiting plates 9, and the left and right edges of the horizontal support plate 10 are provided with first limiting grooves that cooperate with the first limiting plates 9. The left and right edges of the horizontal support plate 10 are further provided with second limiting plates 1, and the left or right edge of the connecting ear 16 is provided with a second limiting groove that cooperates with the second limiting plate 1. There are four first limiting plates 9, arranged in groups of two, on the left and right edges of the bottom plate 14, respectively. There are two second limiting plates 1, arranged in groups of two, respectively, on the left and right edges of the horizontal support plate 10. In the horizontal direction, the second limiting plate 1 is located between the two first limiting plates 9 on the corresponding side.

[0022] In this embodiment, the bottom plate 14 and the horizontal support plate 10 are respectively in the shape of long strips to avoid interference with the rotation of the test piece. The four corners of the bottom plate 14 are respectively provided with protruding mounting ears 13, and the protruding mounting ears 13 are provided with mounting holes 17.

[0023] Working principle:

[0024] During use, the device is fixed to the top of the test equipment using the mounting holes 17. The support height is then adjusted according to the size of the test piece using the lifting cylinder 15. The outer bearing of the test piece is supported on the lower clamp 8, and then the upper clamp 3 is fastened and positioned using the fastening bolt pair. Finally, the two jacking screws 4 are tightened.

[0025] During the test, due to the limiting effect of the first limiting plate 9 and the second limiting plate 1, the impact of the test piece's rotation on the stability of the tooling is greatly reduced, while also ensuring the dynamic balance test effect.

[0026] The above detailed description of the embodiments of the present invention is intended to be a preferred embodiment of the present invention and should not be construed as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the present invention shall still fall within the scope of this patent.

Claims

1. A balancing fixture for an air turbine starter rotor assembly, comprising a base plate and a fastening assembly, characterized in that: The top of described sliding panel also is provided with an interlock plate, and the interlock plate is hinged on the base plate, is fixed with a backing pin on the interlock plate, and an end of sliding panel withstands on the backing pin of interlock plate at least twice.

2. The balancing tool for an air turbine starter rotor assembly according to claim 1, characterized in that: The bottom plate and the horizontal support plate are respectively in the shape of long strips. The four corners of the bottom plate are respectively provided with outward-convex mounting ears, and the outward-convex mounting ears are provided with mounting holes.

3. The balancing tool for an air turbine starter rotor assembly according to claim 1, characterized in that: There are four first limiting vertical plates, which are arranged in groups of two at the left and right edges of the bottom plate respectively. There are two second limiting vertical plates, which are arranged at the left and right edges of the horizontal support plate respectively. In the horizontal direction, the second limiting vertical plates are located between the two first limiting vertical plates on the corresponding sides.

4. The balancing tool for an air turbine starter rotor assembly according to claim 1, characterized in that: The fastening bolt pair includes a fastening bolt fixed on the horizontal support plate, a limiting boss provided on the fastening bolt, a locking nut and a fixing nut sleeved on the end of the fastening bolt, the fastening bolt passes through the connecting ears of the upper clamp and the lower clamp, and the connecting ears are clamped between the limiting boss and the locking nut.

5. The balancing tool for an air turbine starter rotor assembly according to claim 1, characterized in that: The guide assembly consists of a guide sleeve fixed on the bottom plate, a guide column fixed on the lower surface of the horizontal support plate and inserted into the guide sleeve, and a damping layer is provided on the surface of the guide column.

Images