Engine assembly tool with rotor hoisting and anti-rotation functions

Abstract

The utility model discloses an engine assembly tool with rotor hoisting and anti-rotation functions, a turbine is installed and fixed at one tail end of a rotor, turbine blades are formed on the turbine, the engine assembly tool comprises a cross beam, a supporting disc, an anti-rotation block and a hanging ring, an anti-rotation hole is formed in the middle of the cross beam, and the anti-rotation hole is formed in the middle of the supporting disc. The supporting disc comprises a rotor supporting face and a screw rod formed on the surface of one side of the rotor supporting face, the screw rod is installed in the anti-rotation hole in a penetrating mode, the relative position of the screw rod and the anti-rotation hole is adjustable, one tail end of the anti-rotation block is fixedly installed on the rotor supporting face, and the other tail end of the anti-rotation block is tightly attached to the tail end, away from the supporting disc, of the turbine blade. The anti-rotation blocks are located between every two adjacent turbine blades, and the hanging rings are installed at the two tail ends of the cross beam in the length direction. According to the utility model, the rotor lifting function and the anti-rotation function are integrated, the assembly working hours are shortened, and the engine assembly efficiency is improved.

Description

Technical fields:

[0001] This utility model relates to an engine assembly fixture with rotor lifting and anti-rotation functions, which belongs to the field of aero-engine assembly fixtures. Background technology:

[0002] In the field of aero-engine assembly tooling, the realization of rotor lifting and locking functions is one of the core challenges in engine assembly technology. As a high-precision rotating component, the aero-engine rotor requires ensuring concentricity, clearance control, and connection reliability during its assembly process. Any deviation may lead to excessive vibration of the entire engine or rotor abrasion.

[0003] In existing technologies, rotor lifting fixtures generally utilize the threads on the rotor shaft to install specialized lifting tools. Some designs incorporate dedicated lifting grooves on the engine rotor parts, using specialized hook plates to achieve the lifting function. The design of anti-rotation fixtures largely depends on the rotor structure; for example, a specialized nut can be designed using the threads on the rotor shaft, and an anti-rotation torque can be applied to the nut via a handle.

[0004] The existing technology has the following drawbacks:

[0005] (1) The rotor lifting fixture needs to rely on the threads on the rotor shaft, which may damage the threads on the rotor shaft during the assembly process. For small and medium-sized engines, the rotor size is small, and there is no space on the shaft to design a special groove for lifting, making it difficult to select the lifting position of the rotor.

[0006] (2) The core of rotor anti-rotation is to fix the rotor. The pressure generated during the tightening process will act on the fixed position of the rotor parts. If there is a problem with the design of the rotor lifting fixture or the anti-rotation fixture is not properly assembled, the rotor may be subjected to uneven force, which may lead to damage to the surface of the engine rotor parts.

[0007] (3) The rotor lifting and anti-rotation fixtures are separated. The fixtures need to be installed and disassembled separately during the assembly stage, which increases the assembly time and reduces the engine assembly efficiency.

[0008] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Utility Model Content:

[0009] This utility model provides an engine assembly fixture with rotor lifting and anti-rotation functions to solve the problems existing in the prior art.

[0010] This utility model adopts the following technical solution: an engine assembly fixture with rotor lifting and anti-rotation functions, wherein a turbine is fixedly installed at one end of the rotor, and turbine blades are formed on the turbine, including a crossbeam, a support plate, an anti-rotation block, and a lifting ring. An anti-rotation hole is formed in the middle of the crossbeam. The support plate includes a rotor support surface and a screw formed on one side surface of the rotor support surface. The screw is installed through the anti-rotation hole and the relative position of the screw and the anti-rotation hole is adjustable. One end of the anti-rotation block is fixedly installed on the rotor support surface, and the other end is close to the end of the turbine blade away from the support plate. The anti-rotation block is located between two adjacent turbine blades. The lifting ring is installed at both ends of the crossbeam in the length direction.

[0011] Furthermore, a boss is formed at the position of the anti-rotation hole, and a square groove that mates with the boss is formed on the screw along its length.

[0012] Furthermore, two knurled nuts are installed on the screw, with the two knurled nuts located on the upper and lower surfaces of the crossbeam, respectively.

[0013] Furthermore, a second threaded hole is formed on the rotor support surface around the screw, and a second through hole is formed at one end of the anti-rotation block, which is aligned with the second threaded hole. A knurled flat-head screw is tightened in the second through hole and the second threaded hole.

[0014] Furthermore, a front baffle is formed at the other end of the anti-rotation block, and the front baffle is in close contact with the end of the turbine blade away from the support disk.

[0015] Furthermore, the anti-rotation block has a first contact surface and a second contact surface that are opposite to each other at the position adjacent to the front baffle according to the shape of the turbine blade, wherein the first contact surface and the second contact surface are respectively in close contact with two adjacent turbine blades.

[0016] Furthermore, turbine disk end faces are formed on both sides of the turbine blades on the turbine, and the support disk is placed on one of the turbine disk end faces.

[0017] Furthermore, a first threaded hole and a first through hole are formed on the crossbeam at positions on both sides of the anti-rotation hole, with the first threaded hole located outside the first through hole.

[0018] Furthermore, the lifting ring is installed at both ends of the beam along its length by engaging with the first threaded hole through its external thread.

[0019] Furthermore, a hexagonal head bolt is inserted through the first through hole, and the hexagonal head bolt is tightened onto the external engine housing to fix the crossbeam to the engine housing.

[0020] This utility model has the following beneficial effects:

[0021] (1) The rotor is lifted by means of lifting rings installed on the crossbeam;

[0022] (2) The nylon block, the square groove on the screw and the boss on the crossbeam are matched, and the crossbeam is connected to the engine casing with hexagonal head bolts to realize the anti-rotation function of the rotor;

[0023] (3) The screw of the support plate is fixed to the crossbeam with two knurled nuts to realize the adjustment of the rotor assembly position during the assembly process;

[0024] (4) The integration of rotor lifting and anti-rotation functions shortens assembly time and improves engine assembly efficiency. Attached image description:

[0025] Figure 1 This is a schematic diagram of the engine assembly fixture with rotor lifting and anti-rotation functions according to this utility model.

[0026] Figure 2 for Figure 1 A cross-sectional view.

[0027] Figure 3 This is a schematic diagram of the crossbeam.

[0028] Figure 4 This is a schematic diagram of the support plate.

[0029] Figure 5 Diagram to prevent block switching.

[0030] Figure 6 This is a schematic diagram of the engine assembly fixture with rotor lifting and anti-rotation functions of this utility model installed together with the engine casing. Detailed implementation method:

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] This utility model relates to an engine assembly fixture with rotor lifting and anti-rotation functions, comprising a crossbeam 1, a support plate 2, an anti-rotation block 3, a knurled nut 4, a knurled flat head screw 5, a lifting eye 6, and a hexagonal head bolt 7. An anti-rotation hole 103 with a boss (not shown) is formed in the middle of the crossbeam 1. On the crossbeam 1, a first threaded hole 101 and a first through hole 102 are formed at intervals on both sides of the anti-rotation hole 103, with the first threaded hole 101 located outside the first through hole 102. The lifting eye 6 is installed at both ends of the crossbeam 1 along its length by engaging its external thread (not shown) with the first threaded hole 101. The hexagonal head bolt 7 is inserted into the first through hole 102 and tightened onto the engine casing 8, thereby fixing the crossbeam 1 to the engine casing 8.

[0033] The support plate 2 includes a rotor support surface 114 and a screw 110 formed on one side surface of the rotor support surface 114. A square groove 111 extending along the length of the screw 110 is formed on the screw 110. When the screw 110 is installed through the anti-rotation hole 103, the square groove 111 engages with the boss. A knurled nut 4 is installed on the screw 110. The engagement of the knurled nut 4 with the screw 110 achieves the fixation between the support plate 2 and the crossbeam 1 and the adjustment of their axial position. A clearance hole 113 and a second threaded hole 112 located outside the clearance hole 113 are formed on the rotor support surface 114 around the screw 110.

[0034] The anti-rotation block 3 is made of nylon material, which can protect the turbine blades and prevent damage to the turbine blade surface during tightening. The turbine blade 90 is a structure of turbine 9 mounted on the rotor. A second through hole 130 is formed at one end of the anti-rotation block 3, and a front baffle 133 is formed at the other end of the anti-rotation block 3. The anti-rotation block 3 has a first contact surface 131 and a second contact surface 132 that are opposite to each other at the position adjacent to the front baffle 133 according to the shape of the turbine blade 90. The first contact surface 131 and the second contact surface 132 are respectively in close contact with two adjacent turbine blades 90.

[0035] Turbine disk end faces (not shown) are formed on both sides of the turbine blades on the turbine 9. The support disk 2 is placed on one of the turbine disk end faces, and the nut 91 formed on the turbine disk end face passes through the clearance hole 113. The front baffle 133 on the anti-rotation block 3 is close to the end of the turbine blade away from the support disk 2. The first contact surface 131 and the second contact surface 132 are close to the two adjacent turbine blades 90 respectively. The second through hole 130 on the anti-rotation block 3 is aligned with the second threaded hole 112 on the support disk 2. The knurled flat head screws 5 are manually tightened to complete the installation and fixation of the rotor, the anti-rotation block 3 and the support disk 2.

[0036] This utility model relates to an engine assembly fixture with rotor lifting and anti-rotation functions. The assembly and usage process is as follows: First, place the support plate 2 on the turbine disk end face. Install the anti-rotation block 3 between the two turbine blades 90, aligning the second through hole 130 on the anti-rotation block 3 with the second threaded hole 112 on the support plate 2. Manually tighten the knurled flat-head screws 5 to complete the installation and fixation of the rotor, anti-rotation block 3, and support plate 2. Next, assemble the lifting ring 6 with the crossbeam 1. Screw one of the knurled nuts 4 into the appropriate position on the screw 110 on the support plate 2. Align the square groove 111 on the screw 110 with the boss in the anti-rotation hole 103 on the crossbeam 1 and insert it into the crossbeam 1. Tighten the other knurled nut 4. After lifting the rotor using the lifting ring 6, place it into the engine housing 8. The rotor position can be adjusted by adjusting the position of the lower knurled nut 4. After adjustment, tighten the upper knurled nut 4 to completely fix the rotor onto the fixture. Secure the hexagonal head bolts 7 to the engine housing 8. Finally, the rotor is fixed to the engine casing using tooling. The anti-rotation function of the rotor is achieved by the anti-rotation block 3 between the turbine blades 90. The tightening torque on the rotor is transmitted to the support plate 2 through the anti-rotation block 3, and then to the crossbeam 1 through the square groove 111 on the screw 110 and the boss on the anti-rotation hole 103. Finally, it is transmitted to the engine casing 8, thus achieving the rotor anti-rotation function.

[0037] This utility model relates to an engine assembly fixture with rotor lifting and anti-rotation functions. The rotor is mainly fixed by the front baffle 133 of the anti-rotation block 3, the support plate 2, and the knurled flat head screws 5. The support plate 2 is fixed to the crossbeam 1 by two knurled nuts 4. The rotor can be lifted by the lifting rings 6 installed on the crossbeam 1. The rotor anti-rotation function is achieved by the anti-rotation block 3 installed between the turbine blades. The tightening torque on the rotor is transmitted to the support plate 2 through the anti-rotation block 3, then to the crossbeam 1 through the square groove 111 on the screw 110 and the boss on the anti-rotation hole 103, and finally to the engine casing 8, thus achieving the rotor anti-rotation function.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An engine assembly fixture with rotor lifting and anti-rotation functions, wherein a turbine (9) is fixedly mounted on one end of the rotor, and turbine blades (90) are formed on the turbine (9), characterized in that: The device includes a crossbeam (1), a support plate (2), an anti-rotation block (3), and a lifting ring (6). An anti-rotation hole (103) is formed in the middle of the crossbeam (1). The support plate (2) includes a rotor support surface (114) and a screw (110) formed on one side surface of the rotor support surface (114). The screw (110) is installed in the anti-rotation hole (103) and the relative position of the screw (110) and the anti-rotation hole (103) is adjustable. One end of the anti-rotation block (3) is fixed on the rotor support surface (114), and the other end is close to the end of the turbine blade away from the support plate (2). The anti-rotation block (3) is located between two adjacent turbine blades (90). The lifting ring (6) is installed at both ends of the crossbeam (1) in the length direction.

2. The engine assembly tooling with the rotor hoisting and anti-rotation functions as claimed in claim 1, wherein: A boss is formed at the position of the anti-rotation hole (103), and a square groove (111) that matches the boss is formed on the screw (110) along its length direction.

3. The engine assembly tooling with the rotor hoisting and anti-rotation functions as claimed in claim 2, characterized in that: Two knurled nuts (4) are installed on the screw (110), and the two knurled nuts (4) are located on the upper and lower surfaces of the crossbeam (1), respectively.

4. The engine assembly tooling with the rotor hoisting and anti-rotation functions as defined in claim 3, wherein: A second threaded hole (112) is formed on the rotor support surface (114) around the screw (110). A second through hole (130) is formed at one end of the anti-rotation block (3) and is aligned with the second threaded hole (112). A knurled flat-head screw (5) is tightened in the second through hole (130) and the second threaded hole (112).

5. The engine assembly tooling with the rotor hoisting and anti-rotation functions as defined in claim 4, wherein: The other end of the anti-rotation block (3) is formed with a front baffle (133), which is attached to the end of the turbine blade away from the support disk (2).

6. The engine assembly tooling with the rotor hoisting and anti-rotation functions as defined in claim 5, wherein: The anti-rotation block (3) has a first contact surface (131) and a second contact surface (132) that are adjacent to the front baffle (133) according to the shape of the turbine blade (90), wherein the first contact surface (131) and the second contact surface (132) are respectively attached to the two adjacent turbine blades (90).

7. The engine assembly tooling with the rotor hoisting and anti-rotation functions as defined in claim 6, wherein: The turbine (9) has turbine disk end faces formed on both sides of the turbine blades, and the support disk (2) is placed on one of the turbine disk end faces.

8. The engine assembly fixture with rotor lifting and anti-rotation functions as described in claim 1, characterized in that: On the crossbeam (1), a first threaded hole (101) and a first through hole (102) are formed on both sides of the anti-rotation hole (103), respectively, with the first threaded hole (101) located outside the first through hole (102).

9. The engine assembly tooling with the rotor hoisting and anti-rotation functions as defined in claim 8, wherein: The lifting ring (6) is installed at both ends of the crossbeam (1) along its length by engaging with the first threaded hole (101) through the external thread provided thereon.

10. The engine assembly tooling with the rotor hoisting and anti-rotation functions as defined in claim 9, wherein: A hexagonal head bolt (7) is inserted through the first through hole (102), and the hexagonal head bolt (7) is tightened onto the external engine casing (8) to fix the crossbeam (1) onto the engine casing (8).

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