A simulation bench applied to anti-flame oil performance test

Abstract

A kind of simulation bench applied to anti-flame oil performance test, including bearing box, rotor, shaft coupling side rotor loading device, rotor loading device, shaft coupling side rotor loading device and rotor loading device are installed on the two sides of bearing box, bearing, oil baffle are installed in bearing box, vibration measuring device is installed on the upper half of bearing box on rotor loading device side, rotational speed measuring device is installed on the side of rotor on rotor loading device, rotational speed measuring device is installed on speed measuring support, and speed measuring support is connected with bottom plate by bolt;It is connected with motor by diaphragm coupling on the side of shaft coupling side rotor loading device, motor is placed on bottom plate, and motor outer end is axially connected with rotor by diaphragm coupling.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing, and more specifically to a simulation test bench for testing fire-resistant properties. Background Technology

[0002] After the domestic production of fire-resistant oil, various performance indicators of the domestically produced fire-resistant oil were verified through bench tests and related demonstrations and analyses of performance indicators such as aging, hydrolysis, and compatibility to determine whether it met the technical requirements for replacing imported fire-resistant oil. To evaluate the adaptability, long-term effectiveness, and stability of the domestically produced fire-resistant oil and reduce the risks associated with its use, it is urgently necessary to develop a bearing test bench with a reasonable, simple, and reliable structure that can simulate the bearing parameters of the Tianwan Nuclear Power Plant turbine. This bench would be used for continuous operation to analyze the physicochemical properties of oil samples and to track and measure the shaft vibration, bearing vibration, bearing temperature, and return oil temperature of the test bearings to assess whether it meets the verification requirements for fire-resistant oil. Summary of the Invention

[0003] The purpose of this invention is to ensure that the performance and lifespan of domestically produced fire-resistant oil are comparable to those of imported products, achieving complete substitution for imported products. The ultimate goal of this bearing test bench is to verify the performance and lifespan of the domestically produced fire-resistant oil and assess whether it meets the requirements of turbine bearing operating procedures.

[0004] The technical solution of the present invention is as follows: A simulation test bench for testing the performance of fire-resistant oil includes a bearing housing, a rotor, a coupling-side rotor loading device, and a rotor loading device. The coupling-side rotor loading device and the rotor loading device are installed on both sides of the bearing housing. The bearing housing contains bearings and oil retaining rings. A vibration measuring device is installed on the upper half of the bearing housing on the rotor loading device side. A speed measuring device is installed on the rotor on the rotor loading device side. The speed measuring device is installed on a speed measuring bracket, which is bolted to the base plate. The rotor loading device side on the coupling side is connected to a motor via a diaphragm coupling. The motor is placed on the base plate, and the extended end of the motor is axially connected to the rotor via a diaphragm coupling.

[0005] The bearing housing is divided into upper and lower halves, which are tightened by bolts on the horizontal split surface. The upper half has a lateral exhaust port, and the lower half has an oil inlet and an oil return port on the same side.

[0006] The bearing housing is connected to the base plate by bolts and positioned by locating pins.

[0007] The diaphragm coupling is equipped with a coupling cover, which is connected to the base plate by bolts.

[0008] The base frame and supporting equipment are fixed together with anchor bolts.

[0009] The coupling-side rotor loading device includes a rolling bearing housing, a hydraulic cylinder, a load support, and rolling bearings. The rolling bearings are installed in the rolling bearing housing and are connected to the load support by bolts. The hydraulic cylinder and the load support are connected by threads, and the hydraulic cylinder and the load support are respectively connected to the base frame by bolts.

[0010] The load-bearing bracket has a pre-installed installation gap in the height direction.

[0011] The coupling-side rotor loading device and the rotor loading device have the same structure.

[0012] The motor is placed on the base plate and secured with bolts.

[0013] An adjusting shim is provided between the motor and the base plate.

[0014] The significant advantages of this invention are:

[0015] 1. The test bench adopts an integrated frame structure, with the motor module and bearing housing module placed together on the base frame, making installation simple;

[0016] 2. There is a set of load supports on each side of the bearing housing. By applying downward pulling force, the rotor's self-weight is increased. Under the premise of meeting the specific pressure of the test bearing, the rotor's moment of inertia is reduced by more than 20 times. This significantly reduces the requirements of the test bench for the starting torque of the drive motor, thereby significantly reducing the power of the drive motor.

[0017] 3. The rotor and the load support are connected by a rolling bearing housing to ensure that the rotor rotates without jamming;

[0018] 4. The generator and rotor are connected by a diaphragm coupling, and their relative positions can be locally adjusted, which facilitates installation;

[0019] 5. The downward force applied to the rotor can be adjusted via a hydraulic cylinder, allowing for pressure adjustment. Long-term operational tests of domestically produced fire-resistant oil are conducted on this bearing test bench to simulate its actual working conditions. By monitoring changes in the physical properties of the domestic fire-resistant oil, including acid value and air release value, and comparing data with similar imported fire-resistant oil, the adaptability, longevity, and stability of the product can be accurately assessed, thus reducing usage risks. Measurements and data collection of shaft vibration, bearing vibration, bearing temperature, and return oil temperature of the test bearings are used to evaluate whether the test bearings meet the turbine manufacturer's operating procedures, thus comprehensively assessing the feasibility of domestically produced fire-resistant oil replacing imported fire-resistant oil. Attached Figure Description

[0020] Figure 1 This is a longitudinal sectional view of the simulation test bench used for testing fire-resistant oil performance provided by the present invention.

[0021] Figure 2This is a front view of the simulation platform for testing fire-resistant oil performance provided by the present invention.

[0022] Figure 3 This is a top view of the simulation platform used for testing fire-resistant oil performance provided by the present invention;

[0023] Figure 4 This is a schematic diagram of the rotor load loading device for the simulation table used in fire-resistant oil performance testing provided by the present invention.

[0024] In the diagram: 1-Bearing housing, 2-Rotor, 3-Coupling side rotor loading device, 4-Rotor loading device, 5-Coupling cover, 6-Diaphragm coupling, 7-Speed ​​measuring bracket, 8-Motor, 9-Base plate, 10-Anchor bolt, 11-Rolling bearing housing, 12-Hydraulic cylinder, 13-Load bracket, 14-Speed ​​measuring device, 15-Bearing, 16-Oil retaining ring, 17-Vibration measuring device, 18-Rolling bearing. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples:

[0026] Combined with appendix Figures 1-4 A simulation test bench for testing the performance of fire-resistant oil includes a bearing housing 1, a rotor 2, a coupling-side rotor loading device 3, and a rotor loading device 4. The coupling-side rotor loading device 3 and the rotor loading device 4 are installed on both sides of the bearing housing 1. The bearing housing 1 contains a bearing 15 and an oil baffle ring 16. The upper half of the bearing housing 1 on the rotor loading device 4 side is equipped with a vibration measuring device 17. The rotor 2 on the rotor loading device 4 side is equipped with a speed measuring device 14. The rotor loading device 3 on the coupling side is connected to a motor 8 through a diaphragm coupling 6. The diaphragm coupling 6 is covered with a coupling cover 5. The base frame 9 is fixed to the supporting equipment by anchor bolts 10.

[0027] The bearing housing 1 is divided into upper and lower halves, which are secured by bolts on a horizontal split surface. The upper half has a lateral exhaust port, while the lower half has an oil inlet and an oil return port on the same side for easy installation. The bearing housing 1 is connected to the base plate 9 by bolts and positioned by locating pins.

[0028] The speed measuring device 14, the coupling cover 5, and the base plate 9 are connected by bolts.

[0029] The motor 8 is placed on the base plate 9 and secured with bolts. Adjustment shims are provided between the motor 8 and the base plate 9, allowing adjustment according to the actual horizontal elevation after production and installation to ensure that the motor 8 and rotor 2 are at the same horizontal level. The extended end of the motor 8 is axially connected to the rotor 2 via a diaphragm coupling 6. The relative position of the motor 8 and rotor 2 along the axial direction can be locally adjusted according to the actual installation state of the diaphragm coupling 6 for convenient installation.

[0030] A working mode of a bearing housing module for a simulation test bench used in fire-resistant performance testing:

[0031] A set of rotor loading devices 3 and 4 are respectively installed on both sides of the bearing housing 1. A hydraulic cylinder 12 applies a downward pulling force to the load support 13 to increase the rotor's self-weight. While meeting the specific pressure requirements of the test bearing, this reduces the rotor 2's moment of inertia by more than 20 times, significantly reducing the starting torque requirement of the motor 8 for increasing the unit's speed, and thus significantly reducing the power of the motor 8. The hydraulic cylinder 12 is designed with an oil supply main pipe, which provides good pressure stability, ensuring stable and controllable pressure loading on both sides and maintaining uniform loading. The rotor 2 is connected to the load support 13 via a rolling bearing seat 11, ensuring smooth rotor rotation. Two vibration measuring points and three speed measuring points are installed outside the bearing housing 2 to monitor the stable operation of the rotor 2 during the bearing test.

[0032] The present invention has been described in detail above, but its practical value is not limited to the above content. Within the scope of knowledge possessed by those skilled in the art, various changes can be made for practical applications without departing from the spirit of the present invention.

Claims

1. A simulation test bench for testing the performance of fire-resistant oil, characterized in that: The device includes a bearing housing (1), a rotor (2), a coupling-side rotor loading device (3), and a rotor loading device (4). The coupling-side rotor loading device (3) and the rotor loading device (4) are installed on both sides of the bearing housing (1). The bearing housing (1) contains a bearing (15) and an oil retainer (16). The upper half of the bearing housing (1) on the side of the rotor loading device (4) is equipped with a vibration measuring device (17). The rotor (2) on the side of the rotor loading device (4) is equipped with a speed measuring device (14). The speed measuring device (14) is installed on a speed measuring bracket (7). The speed measuring bracket (7) is connected to the base plate (9) by bolts. The rotor loading device (3) on the coupling side is connected to the motor (8) through a diaphragm coupling (6). The motor (8) is placed on the base plate (9). The extended end of the motor (8) is axially connected to the rotor (2) through the diaphragm coupling (6). The coupling-side rotor loading device (3) includes a rolling bearing housing (11), a hydraulic cylinder (12), a load bracket (13), and a rolling bearing (18); the rolling bearing (18) is installed in the rolling bearing housing (11) and is connected to the load bracket (13) by bolts; the hydraulic cylinder (12) and the load bracket (13) are connected by threads, and the hydraulic cylinder (12) and the load bracket (13) are respectively connected to the base plate (9) by bolts; The load bracket (13) has a pre-reserved installation gap in the height direction; The coupling-side rotor loading device (3) and rotor loading device (4) have the same configuration.

2. The simulation test bench for testing fire-resistant oil performance according to claim 1, characterized in that: The bearing housing (1) is divided into upper and lower halves, which are tightened by horizontal split bolts. The upper half is provided with a lateral exhaust hole, and the lower half is provided with an oil inlet hole and an oil return hole on the same side.

3. The simulation test bench for testing fire-resistant oil performance according to claim 1, characterized in that: The bearing housing (1) is connected to the base plate (9) by bolts and positioned by locating pins.

4. The simulation test bench for testing fire-resistant oil performance according to claim 1, characterized in that: The diaphragm coupling (6) is equipped with a coupling cover (5), which is connected to the base plate (9) by bolts.

5. A simulation test bench for testing fire-resistant oil performance according to claim 1, characterized in that: The base plate (9) is fixed to the supporting equipment by anchor bolts (10).

6. The simulation test bench for testing fire-resistant oil performance according to claim 1, characterized in that: The motor (8) is placed on the base plate (9) and secured with bolts.

7. The simulation test bench for testing fire-resistant oil performance according to claim 1, characterized in that: An adjusting shim is provided between the motor (8) and the base plate (9).

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