CN-122014697-A - Dynamic leveling and swing control device for thrust pad of vertical motor and working method

CN122014697ACN 122014697 ACN122014697 ACN 122014697ACN-122014697-A

Abstract

The invention relates to the technical field of large-scale vertical motor equipment, in particular to a device for dynamically leveling and controlling the swing degree of a thrust pad of a vertical motor and a working method thereof; the device comprises a hydraulic execution unit, a sensing detection unit, a control unit and a hydraulic supply unit, wherein the hydraulic execution unit comprises a hydraulic cylinder and an oil inlet electromagnetic valve, the sensing detection unit comprises a temperature-pressure integrated sensor, a displacement sensor and a pressure relay, the control unit comprises a controller, the hydraulic supply unit comprises a high-pressure oil pump, a hydraulic oil tank, a low-pressure filter, a high-pressure energy storage device, an electromagnetic pressure relief valve and a flow dividing valve, an oil outlet of the hydraulic oil tank is sequentially connected with the low-pressure filter and the high-pressure oil pump, an outlet of the high-pressure oil pump is connected with the pressure relay and the high-pressure energy storage device, and an outlet of the high-pressure energy storage device is connected with the flow dividing valve in series. Through the micro-amplitude adjustment and pressure closed-loop control structure of the hydraulic oil cylinder, the pressure deviation of each thrust pad can be controlled within 5%, and the stress uniformity is greatly optimized.

Inventors

JIANG WEI
ZHANG YICHENG
WANG XIN
ZHAO SIBO
GE XINLE
LI GANG
WANG HONGJIN
MA WENBO
WANG ANGUO
WANG HONGBIN
JI CHENG
LI FANGHUA

Assignees

佳木斯电机股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260325

Claims (10)

1. The device for dynamically leveling and controlling the swing degree of the thrust pad of the vertical motor is characterized by comprising a hydraulic execution unit, a sensing detection unit, a control unit and a hydraulic supply unit; The hydraulic execution unit comprises a hydraulic oil cylinder (2) and an oil inlet electromagnetic valve (4), the sensing detection unit comprises a temperature-pressure integrated sensor, a displacement sensor (5) and a pressure relay (18), the control unit comprises a controller, and the hydraulic supply unit comprises a high-pressure oil pump (7), a hydraulic oil tank (11), a low-pressure filter (12), a high-pressure energy storage device (15), an electromagnetic pressure relief valve (16) and a diverter valve (17); The oil outlet of hydraulic tank (11) connects gradually low pressure filter (12), high pressure oil pump (7), the exit linkage pressure relay (18) of high pressure oil pump (7), high pressure energy storage device (15), the export series connection flow divider (17) of high pressure energy storage device (15), the export branch oil circuit that matches with thrust pad (1) quantity is established separately to the export of flow divider (17), each branch oil circuit is connected to the oil feed solenoid valve (4) that corresponds hydraulic cylinder (2), the bottom of thrust pad (1) is located in hydraulic cylinder (2), electromagnetic relief valve (16) are connected to the oil outlet of hydraulic cylinder (2), the exit linkage hydraulic tank (11) of electromagnetic relief valve (16), displacement sensor (5) and pressure relay (18) are connected with the controller electricity.
2. The dynamic leveling and balance control device for the thrust pad of the vertical motor according to claim 1, wherein a data processing module is arranged in the controller, the data processing module comprises a temperature compensation module, a pressure equalization processing module, a balance analysis module and a balance data average value calculation module, the temperature compensation module pre-stores a temperature threshold value, the pressure equalization processing module pre-stores a pressure deviation threshold value, the balance analysis module pre-stores a balance threshold value, the balance data average value calculation module sets a data acquisition period of 5 minutes, and the balance average value in each period is automatically calculated and transmitted to the balance analysis module.
3. The dynamic leveling and swing control device for the thrust pad of the vertical motor according to claim 1, wherein an oil cylinder top spherical surface (10) is arranged at the top of the hydraulic oil cylinder (2), and the oil cylinder top spherical surface (10) is abutted with the bottom of the thrust pad (1).
4. The dynamic leveling and swing control device for the thrust pad of the vertical motor according to claim 3, wherein the bottom of the thrust pad (1) is made of alloy or nonmetal wear-resistant materials.
5. The dynamic leveling and swaying control device for the thrust pad of the vertical motor according to any one of claims 1 to 4, wherein the pressure-temperature integrated sensor (3) adopts a built-in structure and is arranged on the side wall of an oil cavity of the hydraulic oil cylinder (2), and a probe of the pressure-temperature integrated sensor (3) is flush with the inner wall of the hydraulic oil cylinder (2).
6. The dynamic leveling and swing control device for the vertical motor thrust pad according to claim 5, wherein the displacement sensor (5) is arranged on a concrete foundation or a motor base, the detection end of the displacement sensor (5) corresponds to the X direction and the Y direction of the motor driving end flange (9) respectively, the distance between the detection end and the surface of the motor driving end flange (9) is 1.5-2.0mm, the detection precision is +/-0.001 mm, and the measuring range is 0-5mm.
7. The dynamic leveling and swaying control device for a thrust pad of a vertical motor according to claim 6, further comprising an overflow valve (8), wherein the overflow valve (8) is connected in parallel with the high-pressure oil pump (7).
8. The dynamic leveling and swing control device for the thrust pad of the vertical motor according to claim 7, wherein an oil temperature cooler and a liquid level meter are arranged in the hydraulic oil tank (11), and a drain valve is arranged at the bottom of the hydraulic oil tank (11).
9. The dynamic leveling and yaw control device for thrust pads of a vertical motor according to claim 1, characterized in that said high-pressure energy storage device (15) is a capsule-type energy accumulator.
10. A working method of the vertical motor thrust pad dynamic leveling and swaying degree control device according to any one of claims 1-9, comprising the following steps: When the equipment runs, the spherical surface (10) at the top end of the oil cylinder is directly contacted with the thrust pad (1), the high-pressure energy storage device (15) maintains a pressure normal state of 20-25MPa, when the pressure relay (18) detects that the pressure of the high-pressure energy storage device (15) is less than or equal to 20MPa, the controller starts the high-pressure oil pump (7) to supplement the pressure to 25MPa and then stops; when the pressure-temperature integrated sensor detects that the pressure of a certain hydraulic cylinder (2) is insufficient and oil is required to be supplemented, the controller drives a corresponding oil inlet electromagnetic valve (4) to be opened, the high-pressure energy storage device (15) directly supplies oil to the hydraulic cylinder (2), the pressure-temperature integrated sensor (3) collects oil pressure and oil temperature data of each hydraulic cylinder (2) in real time and transmits the oil pressure and the oil temperature data to the controller, the controller compares the pressure of each thrust pad (1) with the reference pad pressure, when the deviation exceeds 5%, the controller drives the corresponding oil inlet electromagnetic valve (4) to be opened, the high-pressure energy storage device (15) supplies oil or the electromagnetic pressure relief valve (16) to relieve pressure, the height of the thrust pad (1) is regulated through the expansion and contraction of a piston of the hydraulic cylinder (2) until the pressure is balanced, the displacement sensor (5) continuously collects balance data, the balance value of the X/Y directions in the period is automatically calculated by a balance value calculation module of the balance value data every 5 minutes, if the average value exceeds a threshold value of 0.02mm, the balance value is analyzed by the controller, the balance value direction and the deviation rule is synchronously driven, the electromagnetic valves (16) corresponding to the oil inlet cylinders (2-3) are synchronously driven, the method comprises the steps of adjusting and correcting a posture through multi-watt linkage, keeping an oil inlet electromagnetic valve (4) and an electromagnetic pressure relief valve (16) closed during normal operation, keeping oil pressure stable together by a high-pressure energy storage device (15) and an annoying sealing structure of a hydraulic oil cylinder (2), reducing action frequency through threshold triggering and cycle average value judgment during pressure adjustment and swing degree adjustment, enabling a displacement sensor (5) to sense main shaft deviation through 3-5 circles of manual jiggering before initial starting, and enabling a controller to drive the energy storage device to supply oil to each hydraulic oil cylinder (2) to finish swing degree calibration.

Description

Dynamic leveling and swing control device for thrust pad of vertical motor and working method Technical Field The invention relates to the technical field of large-scale vertical motor equipment, in particular to a device for dynamically leveling and controlling the swing degree of a thrust pad of a vertical motor and a working method. Background The supporting and adjusting structure of the existing large vertical motor thrust pad mainly adopts a rigid supporting bolt design, and the structure has the following inherent defects: The adjustment precision is insufficient, namely the rigid bolts are mechanically and rigidly connected, micron-level fine adjustment cannot be realized in the adjustment process, so that a plurality of thrust pads are difficult to reach a complete horizontal state when the motor normally operates, the stress deviation of each pad is generally more than 15%, and the overall service life of the thrust bearing is seriously influenced. And the stress transmission is uneven, so that the pressure adjustment of the thrust pad is uneven, and the operation of part of the pad is close to the temperature limit, and when the load fluctuation exists in the operation of the motor, the overload phenomenon of the part of the pad is easy to occur, and the pad burning and other faults are caused. The swing degree adjustment convenience is poor, when the swing degree of the flange at the driving end of the motor exceeds the tolerance, the motor end cover, the thrust bearing cover and other parts are required to be disassembled and then the bolt is required to be screwed again for adjustment, or an insulating pad between the mirror plate and the thrust head is required to be adjusted, the single adjustment time for a large-scale unit generally exceeds 8 hours, and the accuracy detection is required to be carried out again after the adjustment, so that the operation and maintenance efficiency of the equipment is seriously affected. The dynamic response capability is not realized, namely the rigid structure cannot respond to the working condition change (such as component deformation caused by temperature rise and stress deviation caused by load fluctuation) in the operation of the motor in real time, the dynamic leveling and the swing correction cannot be realized, and the operation stability of the equipment is limited. The auxiliary component has high dependence and complicated adjustment, the traditional structure is required to be provided with the mirror plate and the insulating pad below the thrust head, the swing degree adjustment is required to be realized by polishing the thickness of the insulating pad, the polishing precision is difficult to control, the time and the labor are consumed, the single polishing adjustment is required to be repeatedly disassembled for detection, and the shutdown time is further prolonged. Disclosure of Invention Therefore, the invention aims to solve the technical problem of insufficient adjustment precision in the prior art, thereby providing the device for dynamically leveling and controlling the swing degree of the thrust pad of the vertical motor. The invention provides a dynamic leveling and swing degree control device for a thrust pad of a vertical motor, which comprises a hydraulic execution unit, a sensing detection unit, a control unit and a hydraulic supply unit, wherein the hydraulic execution unit comprises a hydraulic cylinder and an oil inlet electromagnetic valve, the sensing detection unit comprises a temperature-pressure integrated sensor, a displacement sensor and a pressure relay, the control unit comprises a controller, the hydraulic supply unit comprises a high-pressure oil pump, a hydraulic oil tank, a low-pressure filter, a high-pressure energy storage device and an electromagnetic pressure relief valve, an oil outlet of the hydraulic oil tank is sequentially connected with the low-pressure filter and the high-pressure oil pump, an outlet of the high-pressure oil pump is connected with the pressure relay and the high-pressure energy storage device, an outlet of the high-pressure energy storage device is connected with the split valve in series, an outlet of the split valve is provided with branch oil paths matched with the number of the thrust pad, each branch oil path is connected with the oil inlet electromagnetic valve of the corresponding hydraulic cylinder, the hydraulic cylinder is arranged at the bottom of the thrust pad, an oil outlet of the hydraulic cylinder is connected with the electromagnetic pressure relief valve, an outlet of the electromagnetic pressure relief valve is connected with the hydraulic oil tank, and the displacement sensor and the pressure relay are electrically connected with the controller. The controller is characterized in that a data processing module is arranged in the controller, the data processing module comprises a temperature compensation module, a pressure equalization processing module, a swing degr