Large vertical pump set gearbox centering device

Abstract

The utility model belongs to the technical field of maintenance of large-scale rotating equipment in a nuclear power station, and particularly relates to a large-scale vertical pump set gearbox centering device which comprises a supporting plate, a positioning pin, a radial dial indicator and an axial dial indicator. The supporting plate is inserted into the gap between the upper coupler and the lower coupler, the thickness of the supporting plate is matched with the size of the gap, the positioning pin is detachably installed on the supporting plate, and the position, installed on the supporting plate, of the positioning pin is matched with the outer diameter size of the lower coupler, so that it is ensured that when the centering device is used for conducting centering work along the periphery of the lower coupler, the positioning pin is not damaged. The positioning pin can slide relative to the lower coupler, is attached to the periphery of the lower coupler all the time and rotates along the periphery of the lower coupler. One end of the radial dial indicator is mounted on the supporting plate, and the other end is erected on the periphery of the upper coupling; one end of the axial dial indicator is installed on the supporting plate, and the other end is erected on the top surface of the upper coupling. According to the device, the maintenance efficiency during equipment maintenance can be ensured, and compared with a traditional centering mode, better and more accurate alignment and centering can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of maintenance of large rotating equipment in nuclear power plants, and in particular relates to a large vertical pump group gear box centering device. Background Art

[0002] During the dismantling and overhaul of a large vertical centrifugal pump in a nuclear power plant, the matching gearbox and pump coupling need to be aligned during the reinstallation phase. The gearbox is the connection point between the motor and the pump body, so the alignment of the gearbox plays a vital role.

[0003] The rotation centers of the two shafts connected to the gearbox should be strictly concentric, and the coupling must be accurately aligned and centered during installation. Otherwise, it will affect the overall installation accuracy of the equipment, resulting in a decrease in the equipment's operating performance. In severe cases, related components will be damaged during operation.

[0004] Traditional coupling alignment requires setting up a dial indicator on the coupling mating surface and outer circle, putting the gearbox oil station into use, and turning the gearbox. This work requires the cooperation of personnel from multiple departments to carry out the online operation of the oil station, the operation of the turning tool, the data measurement, and the equipment position adjustment. The work consumes a lot of manpower and has low efficiency. Utility Model Content

[0005] The utility model aims to provide a large vertical pump group gearbox centering device, which can ensure the maintenance efficiency during equipment maintenance and can better and more accurately align and center compared with traditional centering methods.

[0006] Technical solution to achieve the purpose of this utility model:

[0007] A large vertical pump group gearbox centering device, the device comprising: a support plate, a positioning pin, a radial dial indicator, and an axial dial indicator;

[0008] The support plate is inserted into the gap between the upper coupling and the lower coupling, the thickness of the support plate matches the size of the gap, the positioning pin is detachably mounted on the support plate, and the position of the positioning pin mounted on the support plate matches the outer diameter size of the lower coupling, ensuring that when the centering device is used to perform centering along the outer periphery of the lower coupling, the positioning pin can slide relative to the lower coupling, always fit the outer periphery of the lower coupling and rotate along the outer periphery of the lower coupling;

[0009] One end of the radial dial indicator is installed on the support plate, and the other end is mounted on the outer periphery of the upper coupling to ensure that when the centering device is used to perform centering work along the outer periphery of the lower coupling, the radial dial indicator can slide relative to the upper coupling and always fit the outer periphery of the upper coupling to measure the radial dimensions of the upper coupling;

[0010] One end of the axial dial indicator is installed on the support plate, and the other end is mounted on the top surface of the upper coupling to ensure that when the centering device is used to perform centering work along the outer periphery of the lower coupling, the axial dial indicator can slide relative to the upper coupling and always fit the top surface of the upper coupling to measure the axial dimension of the upper coupling.

[0011] The device also includes a nut, which matches the positioning pin and is used to fix the position of the positioning pin on the support plate.

[0012] The device also includes a handle, which is detachably mounted on the support plate.

[0013] The radial dial gauge is adsorbed on the support plate through a magnetic gauge seat, and the axial dial gauge is adsorbed on the support plate through a magnetic gauge seat.

[0014] The supporting plate is semicircular.

[0015] The positioning pins are adjusted and installed at different positions along the radial direction of the support plate to match couplings of different specifications and sizes.

[0016] A plurality of positioning pins are installed simultaneously along the circumferential direction of the support plate, ensuring that when the centering device is used to perform centering work along the outer circumference of the lower coupling, the measurement of the centering device is stable.

[0017] The positioning pins are installed on the support plate through holes provided on the support plate.

[0018] The support plate is provided with a plurality of holes spaced apart in radial direction, and the positioning pins are adjusted to different positions by being installed in different holes, so as to match couplings of different specifications and sizes.

[0019] The support plate is provided with a plurality of holes spaced apart in the circumferential direction, and a plurality of positioning pins are simultaneously installed in the circumferential direction of the support plate to ensure that the measurement of the centering device is stable when the centering device is used to perform centering work along the outer periphery of the lower coupling.

[0020] The beneficial technical effects of the utility model are:

[0021] 1. The utility model provides a large vertical pump group gear box centering device, which has a simple structure and is easy to operate.

[0022] 2. The utility model provides a large vertical pump group gearbox centering device, which can improve the accuracy of gearbox alignment and centering and reduce the difficulty of installation and adjustment.

[0023] 3. The large vertical pump group gearbox centering device provided by the utility model is used for alignment and centering work. It is not only simple to operate, but also saves the need to rely on manpower to align the gearbox multiple times, saves a lot of manpower consumed in traditional alignment methods, and effectively avoids the risk of gearbox vibration or damage caused by multiple alignment and centering by manpower, effectively improves the maintenance efficiency of the gearbox, and shortens the maintenance period of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a large vertical pump unit gearbox centering device provided by the utility model;

[0025] Figure 2 This is a front view of a large vertical pump unit gearbox centering device provided by the utility model;

[0026] Figure 3 A top view of a large vertical pump unit gearbox centering device provided by the utility model;

[0027] Figure 4 This is a front view of a handle in a large vertical pump unit gearbox centering device provided by the utility model;

[0028] Figure 5 This is a front view of a positioning pin in a large vertical pump unit gearbox centering device provided by the utility model;

[0029] Figure 6 This is a working state diagram of a large vertical pump group gearbox centering device provided by the utility model;

[0030] Figure 7 A schematic diagram of the measuring position of a dial indicator in a large vertical pump unit gearbox centering device provided by the utility model: Figure 7 a is a schematic diagram of the radial dial indicator measurement position. Figure 7 b is a schematic diagram of the axial dial indicator measurement position.

[0031] In the figure: 1-support plate; 2-locating pin; 3-nut; 4-handle; 5-radial dial indicator; 6-axial dial indicator; 7-upper coupling; 8-lower coupling. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1-6 As shown, the utility model provides a large vertical pump group gearbox centering device, comprising: a support plate 1, a positioning pin 2, a nut 3, a handle 4, a radial dial indicator 5, and an axial dial indicator 6.

[0034] The support plate 1 is inserted into the gap between the upper coupling 7 and the lower coupling 8, and the thickness of the support plate 1 matches the size of the gap. The positioning pin 2 is detachably mounted on the support plate 1, and the position where the positioning pin 2 is mounted on the support plate 1 matches the outer diameter of the lower coupling 8, ensuring that when the centering device is used to perform centering along the outer periphery of the lower coupling 8, the positioning pin 2 can slide relative to the lower coupling 8, always fit the outer periphery of the lower coupling 8 and rotate along the outer periphery of the lower coupling 8; the nut 3 matches the positioning pin 2 and is used to fix the position of the positioning pin 2 on the support plate 1.

[0035] The support plate 1 is provided with a plurality of holes spaced apart in radial and circumferential directions, and the positioning pins 2 are installed on the support plate 1 through the holes provided on the support plate 1 .

[0036] The positioning pin 2 is installed in different holes radially opened on the support plate 1, and the positioning pin 2 is adjusted to different positions for matching couplings of different specifications and sizes.

[0037] The locating pins 2 are installed in multiple holes opened along the circumferential direction of the support plate 1, so that multiple locating pins 2 can be installed simultaneously in the circumferential direction of the support plate 1, ensuring that the measurement of the centering device is stable when the centering device is used to perform centering work along the outer periphery of the lower coupling 8.

[0038] The handle 4 can be detachably mounted on the support plate 1, so as to facilitate alignment and centering using the centering device of the utility model.

[0039] After the alignment and centering are completed, the handle 4 and the positioning pin 2 can be directly disassembled, and the support plate 1 can be put away to the corresponding area such as the maintenance site. The disassembly is simple and does not occupy the on-site maintenance space.

[0040] The support plate 1 is semicircular in shape, and the deadweight of the structure is reduced as much as possible without reducing the strength, so as to facilitate the operation and transportation of maintenance personnel.

[0041] One end of the radial dial gauge 5 is mounted on the support plate 1, and the other end is mounted on the outer periphery of the upper coupling 7, so as to ensure that when the centering device is used to perform centering along the outer periphery of the lower coupling 8, the radial dial gauge 5 can slide relative to the upper coupling 7, always fit the outer periphery of the upper coupling 7, and measure the radial dimension of the upper coupling 7;

[0042] One end of the axial dial indicator 6 is mounted on the support plate 1, and the other end is mounted on the top surface of the upper coupling 7, to ensure that when the centering device is used to perform centering work along the outer periphery of the lower coupling 8, the axial dial indicator 6 can slide relative to the upper coupling 7, always fit the top surface of the upper coupling 7, and measure the axial dimension of the upper coupling 7.

[0043] The radial dial indicator 5 is adsorbed on the support plate 1 through a magnetic base, and the axial dial indicator 6 is adsorbed on the support plate 1 through a magnetic base.

[0044] When the centering device of the utility model is used to center the coupling, it is no longer necessary to jack up the gearbox shaft and turn the gear. The centering data no longer introduces errors caused by the clearance between the guide bushes and the imbalance of the gearbox rotor, effectively improving the accuracy of alignment and centering.

[0045] The centering device of the utility model can be used for the alignment and centering of most large vertical centrifugal pumps, gear boxes and motors, has a wide range of uses, and can improve the reliability of equipment maintenance while reducing the maintenance period.

[0046] The centering device of the utility model performs centering work, which specifically includes the following steps:

[0047] Step 1, insert the support plate 1 into the gap between the upper coupling and the lower coupling;

[0048] Step 2, place two dial gauge stands (such as magnetic gauge holders) on the support plate 1, and respectively set up a radial dial gauge 5 and an axial dial gauge 6 on the side and top surface of the upper coupling;

[0049] Step 3: Rotate the lower coupling one circle through the positioning pin 2;

[0050] Step 4: Read the readings of radial dial gauge 5 and axial dial gauge 6 at four symmetrical points respectively: the readings of radial dial gauge 5 are A1, A2, B1, B2 respectively. Figure 7 As shown in a, by calculating (A1-A2) / 2 and (B1-B2) / 2, the radial deviation of the coupling under test is obtained; the readings of the axial dial indicator 6 are a1, a2, b1, and b2 respectively, as shown in Figure 7 As shown in b, by calculating (a1-a2) and (b1-b2), the axial deviation of the coupling under test is obtained;

[0051] Step 5: Adjust the position of the gearbox according to the radial deviation and axial deviation.

[0052] The utility model is described in detail above with reference to the accompanying drawings and embodiments, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the utility model. The contents not described in detail in the utility model can adopt the existing technology.

Claims

1. A large vertical pump unit gearbox centering device, characterized in that: The device comprises: a support plate (1), a positioning pin (2), a radial dial indicator (5), and an axial dial indicator (6); The support plate (1) is inserted into the gap between the upper coupling (7) and the lower coupling (8), the thickness of the support plate (1) matches the size of the gap, the positioning pin (2) is detachably mounted on the support plate (1), the position of the positioning pin (2) mounted on the support plate (1) matches the outer diameter size of the lower coupling (8), ensuring that when the centering device is used to perform centering along the outer periphery of the lower coupling (8), the positioning pin (2) can slide relative to the lower coupling (8), always fit the outer periphery of the lower coupling (8) and rotate along the outer periphery of the lower coupling (8); One end of the radial dial gauge (5) is mounted on the support plate (1), and the other end is mounted on the outer periphery of the upper coupling (7), so as to ensure that when the centering device is used to perform centering along the outer periphery of the lower coupling (8), the radial dial gauge (5) can slide relative to the upper coupling (7) and always fit the outer periphery of the upper coupling (7) to measure the radial dimension of the upper coupling (7); One end of the axial dial indicator (6) is mounted on the support plate (1), and the other end is mounted on the top surface of the upper coupling (7), so as to ensure that when the centering device is used to perform centering work along the outer periphery of the lower coupling (8), the axial dial indicator (6) can slide relative to the upper coupling (7) and always fit the top surface of the upper coupling (7) to measure the axial dimension of the upper coupling (7).

2. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: The device further comprises: a nut (3), the nut (3) matches the positioning pin (2) and is used to fix the position of the positioning pin (2) on the support plate (1).

3. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: The device further comprises a handle (4), which is detachably mounted on the support plate (1).

4. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: The radial dial gauge (5) is adsorbed on the support plate (1) via a magnetic gauge base, and the axial dial gauge (6) is adsorbed on the support plate (1) via a magnetic gauge base.

5. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: The support plate (1) is semicircular.

6. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: The positioning pin (2) is radially adjustable and installed at different positions along the support plate (1) to match couplings of different specifications and sizes.

7. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: A plurality of positioning pins (2) are installed simultaneously along the circumferential direction of the support plate (1), thereby ensuring that when the centering device is used to perform centering work along the outer circumference of the lower coupling, the measurement of the centering device is stable.

8. A large vertical pump unit gearbox centering device according to claim 1, characterized in that: The positioning pin (2) is installed on the support plate (1) through a hole opened on the support plate (1).

9. A large vertical pump unit gearbox centering device according to claim 8, characterized in that: The support plate (1) is provided with a plurality of holes spaced apart in the radial direction, and the positioning pins (2) are adjusted to different positions by being installed on different holes, so as to match couplings of different specifications and sizes.

10. A large vertical pump unit gearbox centering device according to claim 8, characterized in that: The support plate (1) is provided with a plurality of holes spaced apart in a circumferential direction, and a plurality of positioning pins (2) are simultaneously installed in a circumferential direction on the support plate (1), thereby ensuring that when the centering device is used to perform centering work along the outer circumference of the lower coupling (8), the measurement of the centering device is stable.

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