Gas turbine rotor runout measuring device

Abstract

This utility model discloses a gas turbine rotor axial movement measurement device, belonging to the technical field of measurement devices. It includes an assembly bracket, a dial indicator, and a lifting assembly. A compressor casing is fixedly connected to the top of the assembly bracket, and a rotor disc is disposed inside the compressor casing. A rotor rear journal is located at the center of the rotor disc. The lifting assembly is used for lifting the rotor rear journal. The dial indicator is connected to the top of the compressor casing via a magnetic base, and the dial indicator needle contacts the surface of the rotor disc. Through the installation of the lifting assembly, in conjunction with the assembly bracket and the dial indicator, lifting can be performed using the inner cavity of the rotor rear journal, eliminating the need to use the threads at the rotor rear journal and remove the nuts and locking plates installed at the rotor rear journal, thus improving the convenience and flexibility of operation and consequently enhancing the ease of axial movement measurement.

Description

Technical Field

[0001] This utility model relates to the field of measuring device technology, specifically a gas turbine rotor axial movement measuring device. Background Technology

[0002] The compressor rotor is the core component of the compressor. Its function is to do work on the air by rotating at high speed, increasing the air pressure and temperature, and providing the necessary conditions for the combustion process in the engine.

[0003] The axial runout of the compressor rotor is a key parameter in gas turbine design to balance thermal expansion, mechanical stress, airflow efficiency, and operational stability. By precisely controlling the range of runout, the reliability and performance of the compressor rotor under extreme operating conditions can be guaranteed. However, in the current technology, there is no dedicated device for measuring the axial runout of the compressor rotor, which makes the measurement of the rotor's axial runout somewhat inconvenient. Moreover, when measuring its axial runout, it is often necessary to remove the nuts and locking plates installed at the rear journal of the rotor, making the operation cumbersome and not convenient for the convenient measurement of the rotor's axial runout.

[0004] Therefore, this utility model provides a gas turbine rotor axial movement measurement device to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides a gas turbine rotor axial movement measurement device, which aims to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a gas turbine rotor axial movement measuring device, comprising an assembly bracket, a dial indicator, and a hoisting assembly. A compressor casing is fixedly connected to the top of the assembly bracket, and a rotor disc is disposed inside the compressor casing. A rotor rear journal is disposed at the center of the rotor disc. The hoisting assembly is used for hoisting the rotor rear journal. The dial indicator is connected to the top of the compressor casing via a magnetic base, and the dial indicator needle contacts the surface of the rotor disc.

[0009] As a preferred technical solution of this application, the compressor casing is vertically suspended on the upper surface of the assembly bracket, and the compressor casing and the assembly bracket are coaxially distributed, and the assembly bracket and the compressor casing are fixedly connected by bolts and fasteners in a flange-like manner.

[0010] As a preferred technical solution of this application, the hoisting assembly includes a sleeve body, a push-pull rod is inserted inside the sleeve body, a stop block is fitted inside the push-pull rod, and a push-pull ring is sleeved on the outside of the stop block. A pawl is circumferentially positioned inside the sleeve body by a cylindrical pin. A slotted bolt is threaded to one side of the sleeve body, and a connecting plate is fixedly connected to the top of the sleeve body by bolts. A double-ended bolt is fixedly connected to the top of the connecting plate.

[0011] In a preferred embodiment of this application, the sleeve body has a vertically movable rectangular groove corresponding to the stop block, and the push-pull ring has a C-shaped cross-section, with the stop block inserted into the C-shaped groove. In another preferred embodiment, the push-pull ring and the stop block are circumferentially connected, and the push-pull ring is rotatably sleeved on the outside of the sleeve body. The inner wall of the push-pull ring has a rectangular groove, and the size of the rectangular groove is larger than the external protrusion size of the slotted bolt.

[0012] As a preferred technical solution of this application, the top inner side of the claw is designed with an inclined structure, the inner wall of the claw has a large chamfered inclined design at the diameter change point, and the bottom outer wall of the push-pull rod is designed with an inclined structure.

[0013] (III) Beneficial Effects

[0014] The beneficial effects of this application are as follows: By setting up a hoisting component, in conjunction with the assembly bracket and dial indicator, this utility model can conveniently and quickly measure the axial movement of the rotor. Through the hoisting component, the rotor can be hoisted using the inner cavity of the rear journal, without using the threads on the rear journal, and without removing the nuts and locking plates installed on the rear journal, thus improving the convenience and flexibility of operation, thereby improving the convenience of axial movement measurement. Moreover, it can take into account the rotor in various assembly states for axial movement measurement, greatly improving the adaptability of rotor axial movement measurement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the measurement state structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional view of the hoisting assembly of this utility model in the hoisting state;

[0017] Figure 3 This is a schematic diagram of the axial cross-sectional structure of the hoisting component of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the hoisting component of this utility model.

[0019] In the picture:

[0020] 1. Assembly bracket; 2. Dial indicator; 3. Lifting assembly; 31. Sleeve body; 32. Push-pull rod; 33. Stop block; 34. Push-pull ring; 35. Claw; 36. Cylindrical pin; 37. Slotted bolt; 38. Connecting plate; 39. Double-ended bolt; 4. Compressor casing; 41. Rotor disc; 42. Rotor rear journal. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-4 As shown, this utility model provides a gas turbine rotor axial movement measurement device, including an assembly bracket 1, a dial gauge 2, and a hoisting assembly 3. A compressor casing 4 is fixedly connected to the top of the assembly bracket 1, and a rotor disc 41 is provided inside the compressor casing 4. A rotor rear journal 42 is provided at the center of the rotor disc 41. The hoisting assembly 3 is used for hoisting the rotor rear journal 42. The dial gauge 2 is connected to the top of the compressor casing 4 via a magnetic base, and the needle of the dial gauge 2 contacts the surface of the rotor disc 41. Through this structure, the axial movement of the rotor can be conveniently measured, thereby improving the convenience of measuring the rotor axial movement.

[0023] Furthermore, the compressor casing 4 is vertically suspended on the upper surface of the mounting bracket 1, and the compressor casing 4 and the mounting bracket 1 are coaxially distributed. The mounting bracket 1 and the compressor casing 4 are fixedly connected by bolts and fasteners in a flange-like manner. Due to this rigid connection, when the rotor is pulled upward, it will rub against the casing and damage the parts. At the same time, if the compressor casing 4 is not locked, it will directly affect the accuracy of the measurement data of the rotor's axial movement.

[0024] Furthermore, the hoisting assembly 3 includes a sleeve body 31, a push-pull rod 32 inserted inside the sleeve body 31, a stop block 33 fitted inside the push-pull rod 32, and a push-pull ring 34 sleeved on the outside of the stop block 33. A claw 35 is circumferentially positioned inside the sleeve body 31 by a cylindrical pin 36. A slotted bolt 37 is threaded to one side of the sleeve body 31, and a connecting plate 38 is fixedly connected to the top of the sleeve body 31 by bolts. A double-ended bolt 39 is fixedly connected to the top of the connecting plate 38. With this structure, when hoisting the rotor rear journal 42, it is not necessary to remove the nut and locking plate installed at the rotor rear journal 42, which improves the convenience and flexibility of operation. The hoisting connection can be quickly achieved through the snap-fit ​​connection.

[0025] Furthermore, the sleeve body 31 has a rectangular groove that moves up and down corresponding to the stop block 33. The cross-section of the push-pull ring 34 is C-shaped, and the stop block 33 is inserted into the C-shaped groove. Through the connection of the stop block 33, the axial displacement connection between the push-pull ring 34 and the push-pull rod 32 is ensured. Thus, the push-pull rod 32 can be adjusted up and down by adjusting the push-pull ring 34.

[0026] Furthermore, the push-pull ring 34 and the stop block 33 are circumferentially connected, and the push-pull ring 34 is rotatably sleeved on the outside of the sleeve body 31. The inner wall of the push-pull ring 34 is provided with a rectangular groove, and the size of the rectangular groove is larger than the external protrusion size of the slotted bolt 37. The opening of the rectangular groove facilitates the vertical displacement of the push-pull ring 34. At the same time, the rotation adjustment of the push-pull ring 34 can complete the misalignment and abutment of the push-pull ring 34, thereby achieving the abutment and positioning of the push-pull rod 32.

[0027] Furthermore, the top inner side of the chuck 35 is designed with an inclined structure, the inner wall of the chuck 35 has a large chamfered inclined design at the diameter change point, and the bottom outer wall of the push-pull rod 32 has an inclined structure. The inclined structure at the top of the chuck 35 ensures that the chuck 35 can rotate and shift, avoiding contact with the inner wall of the sleeve body 31. At the same time, the inclined design at the diameter change point of the chuck 35 can improve the flexibility of contact with the bottom of the push-pull rod 32, play a good guiding role, and avoid displacement interference.

[0028] Working principle: First, install the rotor-specific lifting assembly 3 on the rotor rear journal 42. Rotate the push-pull ring 34 until the rectangular groove in the circumferential direction of the inner diameter of the push-pull ring 34 is in the same position as the slotted bolt 37. Pull the push-pull ring 34 upward, raising the bottom of the push-pull rod 32 above the inner diameter change of the pawl 35. At this time, the pawl of the pawl 35 retracts inward due to the influence of gravity. The height of the push-pull ring 34 exceeds the slotted bolt 37. Rotate the push-pull ring 34 until its rectangular groove is misaligned with the slotted bolt 37, so that the push-pull ring 34 is locked by the slotted bolt 37, preventing the pawl 35 from descending. The pawl of the pawl 35 remains in a retracted state and is inserted into the inner cavity of the rotor rear journal 42. Rotate the push-pull ring 34 until its rectangular groove is in the same position as the slotted bolt 37, releasing the locking and positioning of the push-pull ring 34. At this time, the push-pull rod 32 is pushed downward by gravity, and the push-pull rod 32 opens the pawl of the pawl 35 until its pawl pulls the rotor rear journal. 42. Rotate the push-pull ring 34 to offset its rectangular groove from the slotted bolt 37, thus completing the auxiliary limit of the push-pull ring 34, preventing the push-pull rod 32 from moving upward, ensuring that the pawl 35 is continuously open, and preventing the pawl 35 from retracting during hoisting and causing the compressor casing 4 to fall off. Hoist the compressor casing 4 onto the assembly bracket 1 and fix it. Finally, attach the magnetic base to the compressor casing 4 and install the dial indicator 2. Press the indicator needle onto the surface of the rotor disc 41. Clean the surface of the rotor disc 41 before pressing the indicator to ensure that the disc surface is clean. Connect the electronic scale through the crane, and then connect the hook of the electronic scale to the double-ended bolt 39. Operate the crane to slowly rise while observing the reading of the electronic scale. Stop raising the crane when the tension reaches the required level and observe whether the reading of the electronic scale is stable. Finally, read the readings of the three dial indicators 2 respectively, and take the average value to obtain the axial movement of the rotor.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A device for measuring the axial movement of a gas turbine rotor, characterized in that: The assembly includes an assembly bracket (1), a dial indicator (2), and a hoisting assembly (3). A compressor casing (4) is fixedly connected to the top of the assembly bracket (1), and a rotor wheel (41) is provided inside the compressor casing (4). A rotor rear journal (42) is provided at the center of the rotor wheel (41). The hoisting assembly (3) is used for hoisting the rotor rear journal (42). The dial indicator (2) is connected to the top of the compressor casing (4) through a magnetic base, and the needle of the dial indicator (2) contacts the surface of the rotor wheel (41).

2. The gas turbine rotor axial movement measuring device according to claim 1, characterized in that: The compressor casing (4) is vertically suspended on the upper surface of the assembly bracket (1), and the compressor casing (4) and the assembly bracket (1) are coaxially distributed. The assembly bracket (1) and the compressor casing (4) are fixedly connected by bolts and fasteners in a flange manner.

3. The gas turbine rotor axial movement measuring device according to claim 2, characterized in that: The hoisting assembly (3) includes a sleeve body (31), a push-pull rod (32) is inserted inside the sleeve body (31), a stop block (33) is fitted inside the push-pull rod (32), and a push-pull ring (34) is sleeved on the outside of the stop block (33). A pawl (35) is circumferentially positioned inside the sleeve body (31) by a cylindrical pin (36). A slotted bolt (37) is threaded to one side of the sleeve body (31), and a connecting plate (38) is fixedly connected to the top of the sleeve body (31) by bolts. A double-ended bolt (39) is fixedly connected to the top of the connecting plate (38).

4. The gas turbine rotor axial movement measuring device according to claim 3, characterized in that: The sleeve body (31) has a rectangular groove that moves up and down corresponding to the stop block (33). The cross-section of the push-pull ring (34) is C-shaped, and the stop block (33) is inserted into the C-shaped groove.

5. The gas turbine rotor axial movement measuring device according to claim 3, characterized in that: The push-pull ring (34) is circumferentially connected to the stop block (33), and the push-pull ring (34) is rotatably sleeved on the outside of the sleeve body (31). The inner wall of the push-pull ring (34) is provided with a rectangular groove, and the size of the rectangular groove is larger than the external protrusion size of the slotted bolt (37).

6. The gas turbine rotor axial movement measuring device according to claim 3, characterized in that: The top inner side of the claw (35) is designed with an inclined structure, the inner wall of the claw (35) has a large chamfered inclined design at the diameter change point, and the bottom outer wall of the push-pull rod (32) is designed with an inclined structure.

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