Tool for correcting rotating shaft

Abstract

The utility model discloses a tool for correcting a rotating shaft. The tool comprises a fixing assembly, a bracket and a supporting frame. The fixing assembly comprises a pressing plate, a fixing leg, a pressing block and a jack, the bottom of the fixing leg is slidably connected with the connecting groove of the sand box, the pressing plate is connected with the top of the fixing leg, and the jack is located between the pressing plate and the rotating shaft and applies pressure to a to-be-pressed point in the rotating shaft through the pressing block; a rotor is placed on the bracket; the supporting frame comprises a bottom plate, a jack, a middle plate, a bearing seat, a rotating shaft and a bearing, the bottom plate and the middle plate are connected through a plurality of telescopic guide rods, the jack is arranged between the bottom plate and the middle plate, the bearing seat is connected to the middle plate, the two ends of the rotating shaft are clamped to the bearing seat, and the outer circle face of the rotating shaft is thermally sleeved with the bearing. According to the utility model, points with large runout of the rotating shaft can be corrected, and data measured by the dial indicator are real rotating shaft deformation values; the rotating shaft deformation data is directly measured on the existing station through the supporting frame, frequent transfer is not needed, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of tooling, specifically a tooling for correcting a rotating shaft. It is used to correct the bent rotating shaft of a doubly fed wind turbine rotor, and can also be used in any working condition that requires shaft correction. Background Technology

[0002] To meet the growing demand in the wind power market for higher-power turbines, wind turbine rotors are becoming increasingly heavier, placing higher demands on shaft strength. During production, after the rotors are baked and cured, some rotors experience shaft bending, leading to excessive vibration during generator operation and failing to meet customer requirements. To address this issue, rotor runout must be checked before final assembly (to confirm whether the rotor shaft is bent). If runout is found, the rotor must be straightened before final assembly.

[0003] The design of a shaft alignment fixture is required. The existing first-version solution mainly encounters two problems: First, it cannot accurately verify the top alignment data of shaft 401; for example... Figure 1 The first version of the solution involved placing the rotor 4 on the sand box 5, with the bottom of the pressure plate structure 6 slidably connected to the sand box 5. Simultaneously, the pressure plate structure 6 pressed down on the rotating shaft 401, and then the jack 104 was used to push the end of the rotating shaft 401 upwards (with the point of greatest runout of the rotating shaft 401 facing downwards). However, during the lifting process, the position pressing the rotating shaft 401 increased with the upward force of the jack 104, making it impossible for the dial indicator at the shaft head to accurately reflect the true deformation of the rotating shaft 401 (the rotating shaft 401 was lifted as a whole). Secondly, after calibration, the rotor 4 needed to be hoisted to the balancing machine's roller bracket to check for runout, a process that was overly complex (if the calibration effect was unsatisfactory, it needed to return to the calibration platform for recalibration), resulting in low efficiency. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a tooling for calibrating a rotating shaft, which addresses the shortcomings of the prior art. This tooling can calibrate points with large shaft runout, and the data measured by the dial indicator is the actual value of the shaft deformation, which can accurately verify the top alignment data of the shaft. At the same time, after each shaft pressing process, the shaft deformation data can be measured directly on the existing table through the support frame, eliminating the need for frequent transfer, improving work efficiency, and effectively solving the defects of the first version of the solution in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A tooling for calibrating a rotating shaft includes a fixing component, a bracket, and a support frame;

[0007] The fixing assembly includes a pressure plate, a fixing leg, a pressure block, and a jack. The bottom of the fixing leg is slidably connected to the connecting groove of the sand box. The pressure plate is connected to the top of the fixing leg. The jack is located between the pressure plate and the rotating shaft, above the point on the rotating shaft to be pressured. A dial indicator is placed below the point on the rotating shaft to be pressured. The pressure plate provides a support point for the jack, and the jack applies pressure to the point on the rotating shaft to be pressured through the pressure block.

[0008] The bracket is used to hold the rotor;

[0009] The support frame includes a base plate, a jack, a middle plate, a bearing seat, a rotating shaft, and bearings. The base plate and the middle plate are connected by multiple telescopic guide rods. A jack is provided between the base plate and the middle plate. A bearing seat is connected to the middle plate. Both ends of the rotating shaft are engaged with the bearing seats. A bearing is heat-fitted onto the outer surface of the rotating shaft. The bearings on the support frame are used to provide support force for the rotating shaft.

[0010] As a further improvement of this utility model, there are two fixing components, located at the left and right ends of the rotating shaft, respectively.

[0011] As a further improvement of the present invention, in the fixing component, the bottom of the fixing leg is a T-shaped boss, and the sand box is provided with a T-shaped connecting groove that slides with the T-shaped boss.

[0012] As a further improvement of the present invention, the fixing component has two fixing legs, which are arranged in parallel and connected at the top by a pressure plate, which is bolted to the fixing legs.

[0013] As a further improvement of the present invention, in the fixing component, the jack is connected to the lower surface of the pressure plate, and the end of the push rod of the jack is connected to a pressure block. The surface of the pressure block is an arc concave surface that matches the outer circular surface of the point to be pressured on the rotating shaft.

[0014] As a further improvement of this utility model, the bracket is made of steel, and the upper surface of the bracket is a concave arc surface that matches the outer circular surface of the rotor.

[0015] As a further improvement of the present invention, the support frame has two bearing seats and two rotating shafts. Each bearing seat has two slots, and the slots on the two bearing seats are respectively engaged with the two ends of the rotating shaft.

[0016] As a further improvement of this utility model, in the support frame, the outer circular surface of the rotating shaft is thermally fitted with a ball bearing.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention successfully solves the following problems: 1. The problem of inaccurate verification of the top alignment data of the rotating shaft: The jack support point is moved to the upper side (the point of greater shaft movement during placement faces upwards), a dial indicator is placed under the rotating shaft, and the jacks of the two fixed components simultaneously apply downward pressure to the rotating shaft (at this time, the upward force on the rotating shaft is applied by the rigid bracket, which hardly deforms). The data measured by the dial indicator is the true value of the shaft deformation (after the data meets the requirements, the pressure is maintained for a period of time before depressurization). 2. The problem of low efficiency due to frequent transfer: An adjustable support frame is placed under the bearing stop of the rotating shaft. When pressing the rotating shaft, the height of the support frame is adjusted to a lower point using the jack to ensure that the rotating shaft and the support frame do not contact each other during the pressing process. After the pressing process is completed, the support frame is raised to a fixed position on the bearing stop of the rotating shaft using the jack, the rotating shaft is lifted, the rotor is disengaged from the bracket, the rotating shaft is manually rotated, and the shaft deformation is re-measured using the dial indicator. After adding the support frame, the shaft data can be measured directly on the existing table after each pressing process, eliminating the need for frequent transfer and improving work efficiency. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the existing first version of the scheme.

[0020] Figure 2 This is the main structural view of the present invention.

[0021] Figure 3 This is a side view of the structure of this utility model.

[0022] Figure 4 This is a front view of the structure of the fixing component of this utility model.

[0023] Figure 5 This is a side view of the structure of the fixing component of this utility model.

[0024] Figure 6 This is a top view of the pressure plate in the fixing component of this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of the bracket of this utility model.

[0026] Figure 7 (a) is the main structural view of the bracket of this utility model.

[0027] Figure 7 (b) is a structural side view of the bracket of this utility model.

[0028] Figure 8 This is a schematic diagram of the support frame of this utility model.

[0029] Figure 9 This is a side view of the support frame of this utility model.

[0030] Figure 10 This is a top view of the structure of the base plate in the support frame of this utility model. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0032] like Figure 2-3 As shown, a tooling for calibrating a rotating shaft includes two fixing components 1, two brackets 2, and two support frames 3.

[0033] like Figure 4-5 As shown, the fixing assembly 1 includes a pressure plate 101, a fixing leg 102, a pressure block 103, and a jack 104. The T-shaped boss 1021 at the bottom of the fixing leg 102 is used to slide with the T-shaped connecting groove of the sand box 5. The pressure plate 101 is connected to the top of the fixing leg 102 by bolts. The jack 104 is located between the pressure plate 101 and the rotating shaft 401 in the rotor 4. The jack 104 is located above the point where pressure is to be applied to the rotating shaft 401, and a dial indicator is placed below the point where pressure is to be applied to the rotating shaft 401. The pressure plate 101 is used to provide a support point for the jack 104, and the jack 104 is used to apply pressure to the rotating shaft 401 through the pressure block 103.

[0034] Specifically, the two fixing components 1 are located at the left and right ends of the rotating shaft 401, respectively. There are two fixing legs 102, which are arranged in parallel and connected at their tops by a pressure plate 101. The pressure plate 101 has the following structure... Figure 6 As shown, the pressure plate 101 is connected to the fixed leg 102 by multiple bolts.

[0035] Specifically, the jack 104 is spot-welded to the lower surface of the pressure plate 101. A pressure block 103 is spot-welded to the end of the push rod of the jack 104. The surface of the pressure block 103 is a concave arc surface that matches the outer circular surface of the pressure point on the rotating shaft 401. Alternatively, the jack 104 can be unconnected to the lower surface of the pressure plate 101. During operation, the jack 104 is manually supported, positioned between the pressure plate 101 and the pressure point on the rotating shaft 401. The jack 104 is then activated, and its push rod extends to apply pressure to the pressure point on the rotating shaft 401. At this time, the jack 104 is clamped between the pressure plate 101 and the pressure point on the rotating shaft 401. A dial indicator is placed under the pressure point on the rotating shaft 401 to measure the deformation of the shaft. Once the shaft deformation reaches the specified value, the jack 104 stops applying pressure, completing the calibration.

[0036] The fixed assembly 1 is the main part of the pressure shaft. The T-shaped boss 1021 machined on the lower side of the fixed leg 102 is stuck in the T-shaped connecting groove of the sand box 5. The fixed leg 102 can move axially in the T-shaped connecting groove of the sand box 5 to facilitate the correction of rotor pressure shafts of different lengths. The pressure plate 101 is installed on the fixed leg 102 by bolts and is used to provide a support point for the jack 104. The arc concave surface of the pressure block 103 is machined according to the diameter of the pressure point to increase the force-bearing area of ​​the rotating shaft 401 when applying pressure and avoid local force damage to the rotating shaft 401. The jack 104 is a pressure output component that applies pressure to the rotating shaft 401.

[0037] like Figure 7 As shown, the bracket 2 is located on the upper surface of the sand box 5. Whether the bottom of the bracket 2 needs to be fixedly connected to the upper surface of the sand box 5 can be arranged according to the actual situation (the connection method can be conventional connection methods such as bolts or welding). The bracket 2 is used to place the rotor 4. The bracket 2 is a steel structure. The arc concave surface of the bracket 2 is machined according to the outer circle of the rotor 4 to increase the force-bearing area of ​​the rotor 4 when pressure is applied and avoid local force damage to the rotor 4.

[0038] like Figure 8-9 As shown, the support frame 3 is used to measure the deformation of the rotating shaft after the pressing process. It is placed on the upper surface of the sand box 5. Whether the bottom of the support frame 3 needs to be fixedly connected to the upper surface of the sand box 5 can be arranged according to the actual situation. The support frame 3 includes a base plate 301, a jack 104, an intermediate plate 302, a bearing seat 303, a rotating shaft 304, and a bearing 305. The base plate 301 and the intermediate plate 302 are connected by four telescopic guide rods 306. The jack 104 is provided between the base plate 301 and the intermediate plate 302. Two bearing seats 303 are connected to the intermediate plate 302. The two ends of the rotating shaft 304 are respectively clamped to the two bearing seats 303. The outer surface of the rotating shaft 304 is heat-fitted with a bearing 305. The bearing 305 on the support frame 3 is used to provide support force for the rotating shaft 401. The structure of the base plate 301 is as follows. Figure 10 As shown. There are two bearing housings 303 and two rotating shafts 304. Each bearing housing 303 has two slots, which engage with both ends of the rotating shaft 304. The two rotating shafts 304 are arranged in parallel. The bearing 305 is a ball bearing.

[0039] Specifically, the inner ring of the ball bearing is heat-fitted onto the shaft to form a rotating shaft 304. The heat-fitting process ensures a tight fit between the ball bearing and the shaft, and ensures that the height of the contact point between the rotating shaft 304 and the rotating shaft 401 remains constant during rotation. After the heat-fitting is completed, nuts and washers are used to fix the inner ring of the ball bearing and the shaft into a whole. The ball bearing is used to support the rotating shaft 401. When the rotating shaft 401 is rotated manually, the rotating shaft 304 does not rotate.

[0040] Specifically, the slot of the bearing housing 303 is used to fix the rotating shaft 304, and the telescopic guide rod 306 below ensures that the bearing housing 303 can move vertically when the jack 104 is raised or lowered.

[0041] This embodiment successfully solves the above problems: 1. The problem of inaccurate verification of the top alignment data of the rotating shaft: When the support point of the jack 104 is moved to the upper side, the point of the rotating shaft 401 with the largest jump is facing upwards. A dial indicator is placed on the lower side of the rotating shaft 401. The jacks 104 of the two fixed components 1 apply downward pressure to the rotating shaft 401 at the same time. At this time, the upward force on the rotating shaft 401 is applied by the rigid bracket to the rotating shaft 401. The rigid bracket hardly deforms. The data measured by the dial indicator is the actual value of the rotating shaft deformation. After the data meets the requirements, the pressure is maintained for a period of time before the pressure is released. II. Problem of low efficiency due to frequent transfers: An adjustable support frame 3 is placed under the bearing stop of the rotating shaft 401. When pressing the rotating shaft 401, the height of the support frame 3 is lowered using jack 104 to ensure that the rotating shaft 401 does not contact the support frame 3 during the pressing process. After the pressing process is completed, the support frame 3 is raised and fixed on the bearing stop of the rotating shaft 401 using jack 104, lifting the rotating shaft 401. The rotor 4 then disengages from the bracket 2, and the rotating shaft 401 is manually rotated. The shaft deformation is then re-measured using a dial indicator. With the addition of the support frame 3, the data of the rotating shaft 401 can be measured directly on the existing worktable after each pressing process, eliminating the need for frequent transfers and improving work efficiency.

[0042] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A tooling for calibrating a rotating shaft, characterized in that, It includes a fixing component (1), a bracket (2), and a support frame (3); The fixing assembly (1) includes a pressure plate (101), a fixing leg (102), a pressure block (103), and a jack (104). The bottom of the fixing leg (102) is slidably connected to the connecting groove of the sand box (5). The pressure plate (101) is connected to the top of the fixing leg (102). The jack (104) is located between the pressure plate (101) and the rotating shaft (401) in the rotor (4). The jack (104) is located above the pressure point in the rotating shaft (401), and a dial indicator is placed below the pressure point in the rotating shaft (401). The pressure plate (101) is used to provide a support point for the jack (104), and the jack (104) is used to apply pressure to the pressure point in the rotating shaft (401) through the pressure block (103). The bracket (2) is used to place the rotor (4); The support frame (3) includes a base plate (301), a jack (104), an intermediate plate (302), a bearing seat (303), a rotating shaft (304), and a bearing (305). The base plate (301) and the intermediate plate (302) are connected by multiple telescopic guide rods (306). The jack (104) is provided between the base plate (301) and the intermediate plate (302). The bearing seat (303) is connected to the intermediate plate (302). The two ends of the rotating shaft (304) are engaged with the bearing seat (303). The outer surface of the rotating shaft (304) is heat-fitted with a bearing (305). The bearing (305) on the support frame (3) is used to provide support force for the rotating shaft (401).

2. The tooling for calibrating a rotating shaft according to claim 1, characterized in that, There are two fixing components (1), located at the left and right ends of the rotating shaft (401) respectively.

3. The tooling for calibrating a rotating shaft according to claim 1, characterized in that, In the fixing component (1), the bottom of the fixing leg (102) is a T-shaped boss (1021), and the sand box (5) is provided with a T-shaped connecting groove that slides with the T-shaped boss (1021).

4. The tooling for calibrating a rotating shaft according to claim 3, characterized in that, In the fixing component (1), there are two fixing legs (102). The two fixing legs (102) are arranged in parallel and the tops of the two fixing legs (102) are connected by a pressure plate (101). The pressure plate (101) is connected to the fixing legs (102) by bolts.

5. The tooling for calibrating a rotating shaft according to claim 1, characterized in that, In the fixing component (1), the jack (104) is connected to the lower surface of the pressure plate (101), and the push rod end of the jack (104) is connected to the pressure block (103). The surface of the pressure block (103) is an arc concave surface that matches the outer circular surface of the point to be pressured on the rotating shaft (401).

6. The tooling for calibrating a rotating shaft according to claim 1, characterized in that, The bracket (2) is made of steel, and the upper surface of the bracket (2) is a concave arc surface that matches the outer circular surface of the rotor (4).

7. The tooling for calibrating a rotating shaft according to claim 1, characterized in that, The support frame (3) has two bearing seats (303) and two rotating shafts (304). Each bearing seat (303) has two slots, and the slots on the two bearing seats (303) are respectively engaged with the two ends of the rotating shaft (304).

8. The tooling for calibrating a rotating shaft according to claim 1, characterized in that, In the support frame (3), the outer circular surface of the rotating shaft (304) is fitted with a ball bearing.

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