Auxiliary clamping device for turning steam turbine rotor

Abstract

The utility model discloses an auxiliary clamping device for turning a steam turbine rotor, relates to the technical field of steam turbine rotors, and aims to solve the problems that the steam turbine rotor is damaged during cutting and is low in practicability due to the fact that the steam turbine rotor is long and heavy, and a cutter vibration phenomenon occurs during rotation of the steam turbine rotor in the background technology. According to the scheme, the device comprises a support, the support comprises a base and a mounting base, a lifting mechanism is arranged on the base, and the lifting mechanism comprises two lifting air cylinders connected to the outer wall of the top of the base through bolts and a mounting plate connected to the outer walls of the bottom ends of piston rods of the two lifting air cylinders through bolts; and two mounting mechanisms are arranged at the top of the mounting plate, and each mounting mechanism comprises a connecting plate. The middle position of the steam turbine rotor can be supported and clamped in an auxiliary mode when the steam turbine rotor is turned, the cutter vibration phenomenon of the steam turbine rotor during turning is prevented, and practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine rotor technology, and in particular to an auxiliary clamping device for turning steam turbine rotors. Background Technology

[0002] A steam turbine is a rotary steam power unit. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then injected onto the blades, causing the rotor equipped with a row of blades to rotate and perform work. The steam turbine rotor is an assembly of rotating steam turbine components such as the main shaft, impeller or drum, moving blades, and coupling.

[0003] A search revealed a Chinese patent (application number "201720125455.5") disclosing "an auxiliary clamping device for turning a steam turbine rotor on a horizontal lathe." This device comprises a U-shaped plate, a rectangular copper washer, a first bolt, a second bolt, a third bolt, a fourth bolt, a fifth bolt, and a sixth bolt. The rectangular copper washer is positioned within the opening of the U-shaped plate, with the inner surface of the U-shaped plate and the inner surface of the rectangular copper washer enclosing a rectangular hole in the profile. Of the two end faces of the rectangular copper washer that contact the inner surface of the U-shaped plate, one end face has a first threaded blind hole and a second threaded blind hole, and the other end face has a third threaded blind hole. The device includes a first threaded blind hole and a fourth threaded blind hole; the line connecting the center of the first threaded blind hole and the center of the second threaded blind hole is parallel to the length direction of the end face of the cuboid copper washer that contacts the inner surface of the U-shaped plate; the line connecting the center of the third threaded blind hole and the center of the fourth threaded blind hole is parallel to the length direction of the end face of the cuboid copper washer that contacts the inner surface of the U-shaped plate. However, during use, the above device only fixes the two ends of the turbine rotor. When cutting the turbine rotor, due to the long length and heavy weight of the turbine rotor, the turbine rotor will vibrate during rotation, causing damage to the turbine rotor during cutting, resulting in low practicality. Utility Model Content

[0004] This utility model provides an auxiliary clamping device for turning steam turbine rotors, which solves the problem that the clamping device proposed in the prior art has low practicality because the steam turbine rotor is long and heavy, and the rotor vibrates during rotation, causing damage to the steam turbine rotor during cutting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An auxiliary clamping device for turning a steam turbine rotor includes a bracket, which includes a base and a mounting base. The base is equipped with a lifting mechanism, which includes two lifting cylinders bolted to the top outer wall of the base and mounting plates bolted to the bottom outer wall of the piston rods of the two lifting cylinders. The mounting plates have two mounting mechanisms on their tops. Each mounting mechanism includes a connecting plate with two slots on its top outer wall, two limiting blocks fixed to the bottom outer wall of the connecting plate, a limiting screw fixed to the bottom outer wall of the limiting blocks, and two fixing plates bolted to the slots. Each connecting plate has a support assembly, which includes two fixing blocks bolted to one side outer wall of the two fixing plates and a support roller with a rubber ring fixed to its outer wall. Each of the four fixing plates has a clamping assembly on one side, which includes a clamping cylinder bolted to one side outer wall of the fixing plate, a mounting frame bolted to the outer wall of one end of the piston rod of the clamping cylinder, and a squeezing roller with a rubber ring fixed to its outer wall.

[0007] Preferably, two support plates are fixed on the top outer wall of the base, and the bottom of the mounting base is fixed on the top outer wall of the two support plates respectively.

[0008] Preferably, limiting rods are fixed on the four corners of the bottom outer wall of the mounting plate, and the four limiting rods are respectively inserted through and slidably installed on the bottom outer wall of the mounting base.

[0009] Preferably, the four corner outer walls of the top of the mounting base are provided with limiting grooves along the length direction, and two limiting blocks are slidably installed in two of the limiting grooves respectively. The bottom of each of the four limiting grooves is provided with a channel, and two limiting screws are slidably sleeved in two of the channels respectively.

[0010] Preferably, the two fixed blocks are connected to a fixed rod on the outer wall of opposite sides by a bearing, and the support roller is fixed to the outer wall of the fixed rod.

[0011] The above scheme uses the piston rod of the lifting cylinder to move the mounting plate and two connecting plates, thereby adjusting the distance between the fixed plate and the turbine rotor, so that the support roller contacts and supports the bottom of the turbine rotor.

[0012] Preferably, the bottom of the mounting frame abuts against the top outer wall of the two fixing blocks, and two stabilizing rods are fixed on one outer wall of the mounting frame. The two stabilizing rods pass through and slide on one outer wall of the fixing plate. A rotating shaft is connected to the inner wall of the mounting frame through a bearing, and the extrusion roller is fixed on the outer wall of the rotating shaft.

[0013] The above scheme involves moving the piston rod of the clamping cylinder to move the mounting frame along the surface of the fixed block, which in turn moves the extrusion rollers toward the surface of the turbine rotor. Subsequently, the two opposing extrusion rollers extrude and fix the turbine rotor.

[0014] The beneficial effects of this utility model are as follows:

[0015] The piston rod of the lifting cylinder drives the mounting plate and two connecting plates to move, thereby adjusting the distance between the fixed plate and the turbine rotor. This allows the support roller to contact and support the bottom of the turbine rotor. The piston rod of the clamping cylinder moves, causing the mounting frame to move along the surface of the fixed block, which in turn moves the extrusion roller toward the surface of the turbine rotor. Subsequently, the two opposing extrusion rollers extrude and fix the turbine rotor. This provides support and auxiliary clamping for the middle part of the turbine rotor during turning, preventing the turbine rotor from vibrating during turning and improving its practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall main structure of an auxiliary clamping device for turning a steam turbine rotor proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the main structure of the bracket for an auxiliary clamping device for turning a steam turbine rotor proposed in this utility model.

[0018] Figure 3 This is a front view structural diagram of the lifting mechanism of an auxiliary clamping device for turning a steam turbine rotor proposed in this utility model.

[0019] Figure 4 This is a front view structural diagram of the mounting mechanism of an auxiliary clamping device for turning a steam turbine rotor proposed in this utility model.

[0020] Figure 5 This is a bottom view of the mounting mechanism of an auxiliary clamping device for turning a steam turbine rotor, as proposed in this utility model.

[0021] Figure 6 This is a schematic diagram of the main structure of the support assembly of an auxiliary clamping device for turning a steam turbine rotor according to the present invention.

[0022] Figure 7 This is a schematic diagram of the main structure of the clamping assembly of an auxiliary clamping device for turning a steam turbine rotor according to the present invention.

[0023] In the diagram: 1. Bracket; 101. Base; 102. Support plate; 103. Mounting seat; 2. Lifting mechanism; 201. Lifting cylinder; 202. Mounting plate; 203. Limiting rod; 3. Mounting mechanism; 301. Connecting plate; 302. Limiting block; 303. Limiting screw; 304. Fixing plate; 4. Support assembly; 401. Fixing block; 402. Fixing rod; 403. Support roller; 5. Clamping assembly; 501. Clamping cylinder; 502. Mounting frame; 503. Stabilizing rod; 504. Rotating shaft; 505. Extrusion roller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1, referring to Figure 1-5 An auxiliary clamping device for turning a steam turbine rotor includes a bracket 1, which is composed of a base 101, two side plates 102, and a mounting base 103 welded together. A lifting mechanism 2 is provided on the base 101. The lifting mechanism 2 includes two lifting cylinders 201 bolted to the top outer wall of the base 101 and mounting plates 202 bolted to the bottom outer wall of the piston rods of the two lifting cylinders 201. Limiting rods 203 are fixed to the four corners of the bottom outer wall of the mounting plate 202. The four limiting rods 203 are respectively inserted through and slidably mounted on the bottom outer wall of the mounting base 103. Two mounting mechanisms 3 are provided on the top of the mounting plate 202. 3 includes a connecting plate 301 with two slots on its top outer wall, two limiting blocks 302 fixed to the bottom outer wall of the connecting plate 301, limiting screws 303 fixed to the bottom outer wall of the limiting blocks 302, and two fixing plates 304 connected to the slots by bolts. The four corner outer walls of the top of the mounting base 103 have limiting grooves along the length direction. The two limiting blocks 302 are slidably installed in two of the limiting grooves. The bottom of each of the four limiting grooves has a channel. The two limiting screws 303 are slidably sleeved in two of the channels. The lower part of the limiting screws 303 is screwed with a fastening nut, which is used to fix the entire mounting mechanism 3.

[0026] Example 2, refer to Figure 6-7An auxiliary clamping device for turning a steam turbine rotor further includes several support components 4. Each support component 4 includes two fixing blocks 401 respectively bolted to the outer wall of one side of two fixing plates 304, and a support roller 403 with a rubber ring fixed to its outer wall. Fixing rods 402 are connected to the outer walls of the two fixing blocks 401 on opposite sides via bearings. The support rollers 403 are fixed to the outer walls of the fixing rods 402. Each of the four fixing plates 304 has a clamping component 5 on one side. Each clamping component 5 includes components bolted to the outer wall of one side of the fixing plate 304. The clamping cylinder 501 is bolted to the outer wall of one end of the piston rod of the clamping cylinder 501, and the squeezing roller 505 with a rubber ring fixed on its outer wall. The bottom of the mounting frame 502 abuts against the top outer wall of the two fixing blocks 401 respectively. Two stabilizing rods 503 are fixed on one outer wall of the mounting frame 502. The two stabilizing rods 503 pass through and slide on one outer wall of the fixing plate 304 respectively. A rotating shaft 504 is connected to the inner wall of the mounting frame 502 through a bearing. The squeezing roller 505 is fixed on the outer wall of the rotating shaft 504.

[0027] Working principle: The piston rod of the lifting cylinder 201 drives the mounting plate 202 and the two connecting plates 301 to move, thereby adjusting the distance between the fixing plate 304 and the turbine rotor, so that the support roller 403 contacts and supports the bottom of the turbine rotor. The piston rod of the clamping cylinder 501 moves, driving the mounting frame 502 to move along the surface of the fixing block 401, thereby driving the extrusion roller 505 to move towards the surface of the turbine rotor. Then, the two opposing extrusion rollers 505 extrude and fix the turbine rotor. When the rotor is machined to the clamping position, one of the mounting mechanisms 3 is moved to the machined position, and the machining process can continue.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An auxiliary clamping device for turning a steam turbine rotor, comprising a bracket (1), characterized in that, The bracket (1) includes a base (101) and a mounting base (103). The base (101) is provided with a lifting mechanism (2). The lifting mechanism (2) includes two lifting cylinders (201) that are respectively bolted to the outer wall of the top of the base (101) and a mounting plate (202) that is bolted to the outer wall of the bottom end of the piston rod of the two lifting cylinders (201). The mounting plate (202) is provided with two mounting mechanisms (3) on the top. The mounting mechanism (3) includes a connecting plate (301) with two slots on the top outer wall, two limiting blocks (302) respectively fixed on the bottom outer wall of the connecting plate (301), a limiting screw (303) fixed on the bottom outer wall of the limiting block (302), and two fixing plates (304) respectively connected to the slots by bolts. Both of the connecting plates (301) are provided with support components (4), and the support components (4) include two fixing blocks (401) that are respectively bolted to the outer wall of one side of the two fixing plates (304) and a support roller (403) with a rubber ring fixed on the outer wall; Each of the four fixed plates (304) is provided with a clamping assembly (5) on one side. The clamping assembly (5) includes a clamping cylinder (501) bolted to the outer wall of one side of the fixed plate (304), a mounting frame (502) bolted to the outer wall of one end of the piston rod of the clamping cylinder (501), and a squeezing roller (505) with a rubber ring fixed on the outer wall.

2. The auxiliary clamping device for turning a steam turbine rotor according to claim 1, characterized in that, Two support plates (102) are fixed on the top outer wall of the base (101), and the bottom of the mounting base (103) is fixed on the top outer wall of the two support plates (102).

3. The auxiliary clamping device for turning a steam turbine rotor according to claim 1, characterized in that, Limiting rods (203) are fixed on the four corner outer walls of the bottom of the mounting plate (202), and the four limiting rods (203) are respectively inserted through and slidably installed on the bottom outer wall of the mounting base (103).

4. The auxiliary clamping device for turning a steam turbine rotor according to claim 1, characterized in that, The mounting base (103) has four corner outer walls at the top, each with a locating groove along its length. Two locating blocks (302) are slidably installed in two of the locating grooves. Each of the four locating grooves has a channel at the bottom, and two locating screws (303) are slidably fitted into two of the channels.

5. The auxiliary clamping device for turning a steam turbine rotor according to claim 1, characterized in that, Two fixing blocks (401) are connected to a fixing rod (402) on the outer wall of opposite sides by bearings, and a support roller (403) is fixed on the outer wall of the fixing rod (402).

6. The auxiliary clamping device for turning a steam turbine rotor according to claim 1, characterized in that, The bottom of the mounting frame (502) abuts against the top outer wall of the two fixing blocks (401), and two stabilizing rods (503) are fixed on one outer wall of the mounting frame (502). The two stabilizing rods (503) pass through and slide on one outer wall of the fixing plate (304). A rotating shaft (504) is connected to the inner wall of the mounting frame (502) through a bearing, and the extrusion roller (505) is fixed on the outer wall of the rotating shaft (504).

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