Centralized control type generator rotor jacking device

Abstract

A centralized control type generator rotor jacking device comprises a hydraulic bottom ring and a control cabinet, the hydraulic bottom ring is installed on a base ring of a hydro-generator, a thrust bearing seat penetrates through the hydraulic bottom ring and is connected with a thrust bearing bush, the thrust bearing bush abuts against the lower end of a generator rotor, and the side portion of the hydraulic bottom ring is communicated with a liquid inlet pipe and a liquid outlet pipe. The other ends of the liquid inlet pipe and the liquid outlet pipe are communicated with a control cabinet, hydraulic push rods are annularly and symmetrically arranged on the hydraulic bottom ring, and the hydraulic push rods are connected with a hydraulic system in the hydraulic bottom ring and stretch out and draw back up and down; the novel jacking system is adopted, automatic operation procedures can be achieved, or remote control can be supported, so that reliability and operation convenience of the whole system are improved, and meanwhile maintenance cost and operation risks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydroelectric generator sets in hydropower stations, in particular to a centralized control type generator rotor jacking device. Background Technique

[0002] As one of the core equipment in hydropower stations, before starting or after stopping, in order to protect the thrust bearing and its bearing surface from wear, it is necessary to jack up the generator rotor from the thrust bearing so as to establish a lubricating oil film between the rotor and the thrust bearing pad. This process is usually realized by a generator rotor jacking device.

[0003] At present, traditional generator rotor jacking devices mainly include components such as high-pressure oil pumps, high-pressure oil pipelines, and high-pressure oil cylinders. The high-pressure oil pump is usually movable and is connected to the high-pressure oil cylinder through a high-pressure oil pipeline. When a jacking operation is required, the staff manually starts or stops the high-pressure oil pump to control the jacking up and lowering of the generator rotor; however, this traditional jacking method has the following main defects:

[0004] 1. The jacking process usually requires multiple operators to work together at different positions, increasing the risk of misoperation. Specifically, the operators need to monitor and operate at the high-pressure oil pump, along the high-pressure oil pipeline, and near the high-pressure oil cylinder respectively. This not only requires good communication between personnel but also increases the possibility of human errors;

[0005] 2. The existing jacking system cannot meet the requirements of modern hydropower stations for equipment automation and remote operation, restricting the overall operation efficiency and safety of hydropower stations. With the development of smart grids, higher requirements are put forward for the automation control and remote monitoring capabilities of hydropower station equipment, and traditional jacking devices obviously cannot adapt to this trend;

[0006] 3. Since the operation of traditional jacking devices depends on manual intervention, there are also relatively high costs in daily maintenance and troubleshooting, especially in hydropower stations in remote areas, and this cost is particularly significant. Content of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide a centralized control type generator rotor jacking device. The device adopts a brand-new jacking system, which can realize an automated operation process or support remote control, thereby improving the reliability and operation convenience of the entire system, and at the same time reducing the maintenance cost and operation risk.

[0008] To solve the above technical problem, the technical solution adopted by the utility model is:

[0009] A centralized control type generator rotor jacking device, comprising a hydraulic bottom ring and a control cabinet. The hydraulic bottom ring is installed on the base ring of the hydrogenerator. The thrust bearing seat penetrates through the hydraulic bottom ring and is connected to the thrust bearing pad. The thrust bearing pad abuts against the lower end of the generator rotor. The side of the hydraulic bottom ring is communicated with a liquid inlet pipe and a liquid outlet pipe. The other ends of the liquid inlet pipe and the liquid outlet pipe are communicated with the control cabinet. Hydraulic push rods are symmetrically arranged annularly on the hydraulic bottom ring. The hydraulic push rods are connected to the hydraulic system inside the hydraulic bottom ring and can stretch up and down.

[0010] In a preferred solution, installation holes are symmetrically arranged annularly on the hydraulic bottom ring according to the position of the thrust bearing pad. The thrust bearing seat is installed in the installation holes and is connected to the thrust bearing pad.

[0011] In a preferred solution, the hydraulic push rods are arranged between the thrust bearing pads, and pressure sensors are arranged at the ends of the hydraulic push rods.

[0012] In a preferred solution, an oil supply tank is arranged at the bottom of the control cabinet and is communicated with the liquid inlet pipe and the liquid outlet pipe. A display screen is arranged on the control cabinet, and a control switch is arranged below the display screen.

[0013] In a preferred solution, installation sleeves are symmetrically arranged annularly on the outside of the hydraulic bottom ring. A rotational speed sensor is inserted into the installation sleeve, and the rotational speed sensor is wirelessly connected to the control cabinet.

[0014] In a preferred solution, infrared distance measuring instruments are correspondingly arranged on the outside of the hydraulic push rods and the lower end of the generator rotor. The infrared distance measuring instruments are wirelessly connected to the control cabinet.

[0015] A centralized control type generator rotor jacking device has the following beneficial effects during actual use:

[0016] 1. This device realizes the automatic control of the entire jacking process through the integrated control cabinet, reduces the need for manual intervention, and reduces the risk of misoperation caused by human factors;

[0017] 2. The combination of the hydraulic push rods and the pressure sensors ensures the smoothness and accuracy of the jacking process, can effectively monitor and adjust the jacking force, and avoid unnecessary damage to the generator rotor and the thrust bearing;

[0018] 3. By using the rotational speed sensor and the infrared distance measuring instrument to monitor the state of the generator rotor in real time, abnormal situations can be detected in time, which is convenient for maintenance personnel to quickly locate the problem and take measures, effectively reducing the maintenance cost and the downtime;

[0019] 4. The design of the hydraulic bottom ring enables the entire jacking device to be closely integrated with the hydrogenerator, reducing the need for additional space, which is conducive to optimizing the internal layout of the hydropower station. Through the annular symmetric distribution of hydraulic push rods and mounting holes, the balance and stability during the jacking process are ensured, and the reliability of the overall system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure of the hydraulic bottom ring of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure of the mounting sleeve and the rotational speed sensor of the present utility model;

[0024] Figure 4 is a schematic diagram of the installation structure of the infrared rangefinder of the present utility model.

[0025] In the figure: base ring 1, hydraulic bottom ring 2, mounting hole 201, thrust bearing pad 3, generator rotor 4, liquid inlet pipe 5, liquid outlet pipe 6, thrust bearing seat 7, hydraulic push rod 8, control cabinet 9, display screen 901, control switch 902, oil supply tank 903, pressure sensor 10, mounting sleeve 11, rotational speed sensor 12, infrared rangefinder 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] As Figure 1 and Figure 2 shown, a centralized control type generator rotor jacking device includes a hydraulic bottom ring 2 and a control cabinet 9. The hydraulic bottom ring 2 is installed on the base ring 1 of the hydrogenerator. The thrust bearing seat 7 passes through the hydraulic bottom ring 2 and is connected to the thrust bearing pad 3. The thrust bearing pad 3 abuts against the lower end of the generator rotor 4. The side of the hydraulic bottom ring 2 is communicated with a liquid inlet pipe 5 and a liquid outlet pipe 6. The other ends of the liquid inlet pipe 5 and the liquid outlet pipe 6 are communicated with the control cabinet 9. Hydraulic push rods 8 are annularly and symmetrically installed on the hydraulic bottom ring 2. The hydraulic push rods 8 are connected to the hydraulic system inside the hydraulic bottom ring 2 and can stretch up and down;

[0027] During the operation of the device, when the motor rotor 4 stops running, the control cabinet 9 controls the hydraulic push rods 8 to lift the motor rotor 4 upward, so that the bottom of the generator rotor 4 is separated from the thrust bearing pad 3 to form a lubricating oil film and reduce the wear of the device.

[0028] The preferred solution is as Figure 2 shown. Mounting holes 201 are annularly and symmetrically opened on the hydraulic bottom ring 2 according to the position of the thrust bearing pad 3. The thrust bearing seat 7 is installed in the mounting holes 201 and is connected to the thrust bearing pad 3.

[0029] The preferred solution is as follows Figure 2 shown. The hydraulic push rod 8 is arranged between the thrust bearing pads 3. A pressure sensor 10 is arranged at the end of the hydraulic push rod 8. The upper thrust of the hydraulic push rod 8 can be monitored through the pressure sensor 10, avoiding unnecessary damage to the generator rotor and the thrust bearing.

[0030] The preferred solution is as follows Figure 1 shown. A fuel tank 903 is arranged at the bottom of the control cabinet 9 and is connected to the liquid inlet pipe 5 and the liquid outlet pipe 6. A display screen 901 is arranged on the control cabinet 9, and a control switch 902 is arranged below the display screen 901; the rotational speed of the generator rotor 4, the thrust and the jacking distance of the hydraulic push rod 8 during the operation of the device can be displayed through the display screen 901, and the operation of the device can be controlled through the control switch 902 to realize the manual-automatic switching function.

[0031] The preferred solution is as follows Figure 3 shown. Installation sleeves 11 are symmetrically arranged in a ring shape on the outer side of the hydraulic bottom ring 2. A rotational speed sensor 12 is inserted into the installation sleeve 11, and the rotational speed sensor 12 is wirelessly connected to the control cabinet 9; before the device runs, the operating state of the rotor is monitored through the rotational speed sensor 12. Only when the generator rotor 4 completely stops rotating can it be jacked up and separated from the thrust bearing pad 3, avoiding unnecessary damage to the generator rotor 4 and the thrust bearing. The plug-in installation method of the rotational speed sensor 12 can facilitate subsequent replacement and maintenance.

[0032] The preferred solution is as follows Figure 4 shown. Infrared distance measuring instruments 13 are correspondingly arranged on the outer side of the hydraulic push rod 8 and the lower end of the generator rotor 4. The infrared distance measuring instruments 13 are wirelessly connected to the control cabinet 9. By observing the real-time data monitored by the infrared distance measuring instruments 13, the jacking distance of the generator rotor 4 can be accurately understood.

[0033] The operating principle of the whole device is as follows: When the generator rotor 4 is running normally, it is placed on the thrust bearing pads 3. The thrust bearing pads 3 and the thrust bearing seat 7 bear the pressure in the axial direction of the generator rotor 4. When the generator rotor 4 stops running, the control cabinet 9 controls the hydraulic push rod 8 to extend and jack up the whole generator rotor 4, making it separated from the thrust bearing pads 3. At this time, a lubricating oil film is formed between the bottom of the generator rotor 4 and the thrust bearing pads 3, reducing the wear degree of the device.

Claims

1. A centrally controlled generator rotor lifting device, comprising a hydraulic bottom ring (2) and a control cabinet (9), characterized in that: A hydraulic bottom ring (2) is mounted on a base ring (1) of a hydro-turbine generator, a thrust bearing seat (7) penetrates the hydraulic bottom ring (2) and is connected to a thrust bearing bush (3), the thrust bearing bush (3) abuts against the lower end of a generator rotor (4), a liquid inlet pipe (5) and a liquid outlet pipe (6) are connected to the side of the hydraulic bottom ring (2), the other ends of the liquid inlet pipe (5) and the liquid outlet pipe (6) are connected to a control cabinet (9), and a hydraulic push rod (8) is symmetrically mounted on the hydraulic bottom ring (2) in an annular manner, the hydraulic push rod (8) is connected to a hydraulic system in the hydraulic bottom ring (2) and can be extended and retracted up and down.

2. The centralized control type generator rotor lifting device according to claim 1 is characterized in that: The hydraulic bottom ring (2) is provided with mounting holes (201) symmetrically arranged in an annular manner according to the position of the thrust bearing bush (3). The thrust bearing seat (7) is arranged in the mounting hole (201) and is connected to the thrust bearing bush (3).

3. The centralized control type generator rotor lifting device according to claim 1 is characterized in that: The hydraulic push rod (8) is arranged between the thrust bearing bushes (3), and a pressure sensor (10) is arranged at the end of the hydraulic push rod (8).

4. The centralized control type generator rotor lifting device according to claim 1 is characterized in that: An oil supply box (903) is provided at the bottom of the control cabinet (9) and is connected to the liquid inlet pipe (5) and the liquid outlet pipe (6). A display screen (901) is provided on the control cabinet (9), and a control switch (902) is provided below the display screen (901).

5. The centralized control type generator rotor lifting device according to claim 1 is characterized in that: A mounting sleeve (11) is symmetrically arranged in an annular shape on the outer side of the hydraulic bottom ring (2), a rotation speed sensor (12) is inserted into the mounting sleeve (11), and the rotation speed sensor (12) is connected to the control cabinet (9) via a wireless signal.

6. The centralized control type generator rotor lifting device according to claim 1, characterized in that: An infrared rangefinder (13) is correspondingly installed on the outer side of the hydraulic push rod (8) and the lower end of the generator rotor (4), and the infrared rangefinder (13) is connected to the control cabinet (9) via a wireless signal.

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