CN218914528U

CN218914528U - High-speed bearing lubrication sealing structure of hydraulic dynamometer

Info

Publication number: CN218914528U
Application number: CN202223593323.5U
Authority: CN
Inventors: 张辉; 赵爱国; 李辉; 王钰明
Original assignee: Jiangsu Liance Electromechanical Technology Co ltd
Current assignee: Jiangsu Liance Electromechanical Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-25
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to the technical field of hydraulic dynamometers, in particular to a high-speed bearing lubrication sealing structure of a hydraulic dynamometer, which comprises a shell and a rotating shaft of the hydraulic dynamometer, wherein an inner lubricating oil seal, a high-speed bearing and an outer lubricating oil seal are sleeved between the rotating shaft and the shell in sequence from an inner cavity to an outer side, an oil spraying pipe penetrating between the outer lubricating oil seal and the high-speed bearing from the outer side of the shell is arranged on the shell, an oil collecting groove positioned on the outer side of the inner lubricating oil seal is arranged on the shell, an oil return hole is arranged on the shell, the oil collecting groove is communicated with the inner side of the outer lubricating oil seal through the oil return hole, and a lubrication vacuum suction oil duct communicated with the oil collecting groove is also arranged on the shell. The high-speed bearing lubrication sealing structure of the hydraulic dynamometer can be connected with a lubricating oil circulation system through the oil spraying pipe and the lubricating vacuum suction oil return duct, lubricating oil can be injected into the high-speed bearing through the oil spraying pipe, and the inner and outer oil slingers can throw lubricating oil into the lubricating vacuum suction oil return duct for discharging, so that lubricating oil leakage can be prevented.

Description

High-speed bearing lubrication sealing structure of hydraulic dynamometer

Technical Field

The utility model relates to the technical field of hydraulic dynamometers, in particular to a high-speed bearing lubrication sealing structure of a hydraulic dynamometer.

Background

With the autonomous development of high-power heavy-duty gas turbines and aeroengines, various tests such as product performance development, calibration, matching, simulation, reliability and durability performance and the like are required to be carried out, and a power performance test of the engine is simulated on a test bed through a power loading device.

Because of the advantages of low unit cost, compact size, small inertia, rapid transient response, large absorption load and high-power operation of the hydraulic dynamometer, the hydraulic dynamometer is always an important device for measuring and diagnosing the power performance of a heavy-duty gas turbine and an aeroengine.

When the hydraulic dynamometer measures the power of the prime motor, the rotor rotates along with the prime motor, water entering the dynamometer is stirred, torque is transmitted to the stator and the shell by the water, the stator shell is driven to rotate at a small angle relative to the dynamometer base, the movement trend of the stator and the shell is prevented by the tension and compression sensor assembly, the tension and compression force is measured by the tension and compression sensor, and the power of the prime motor can be obtained by combining the length of a moment arm and the rotating speed.

At present, the domestic traditional hydraulic dynamometer is restricted by factors such as high-speed bearing matching, high-speed bearing lubrication, high-speed sealing and the like, and the phenomenon of lubricating oil leakage easily occurs in the high-speed rotation process of a rotor, so that lubricating oil and water are mixed, and the development and test requirements of a high-power high-speed heavy gas turbine and an aeroengine cannot be well met.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model provides a lubrication sealing structure of a high-speed bearing of a hydraulic dynamometer.

The utility model provides a high-speed bearing lubrication sealing structure of a hydraulic dynamometer, which comprises a shell of the hydraulic dynamometer and a rotating shaft, wherein a lubricating oil inner seal, a high-speed bearing and a lubricating oil outer seal are sequentially sleeved between the rotating shaft and the shell from an inner cavity of the shell to an outer side;

the oil-spraying pipe penetrating between the lubricating oil outer seal and the high-speed bearing from the outer side of the oil-spraying pipe is arranged on the shell, the oil-collecting groove positioned on the outer side of the lubricating oil inner seal is arranged on the shell, the oil-collecting groove is communicated with the inner side of the lubricating oil outer seal through the oil-collecting hole, and the lubricating vacuum suction oil-returning passage communicated with the oil-collecting groove is also arranged on the shell.

Preferably, the lubricating oil inner seal comprises an inner seal oil comb tooth sealing seat and an inner oil slinging ring, the inner oil slinging ring is sleeved on the rotating shaft, the inner seal oil comb tooth sealing seat is fixed on the shell through bolts, and the inner ring of the inner seal oil comb tooth sealing seat is tightly matched with the outer ring of the inner oil slinging ring.

Preferably, the inner ring of the high-speed bearing is fixed on the rotating shaft, and the outer ring of the high-speed bearing is fixed on the shell.

Preferably, the lubricating oil external seal comprises an external seal oil comb tooth sealing seat and an external oil slinging ring, the external oil slinging ring is sleeved on the rotating shaft, the external seal oil comb tooth sealing seat is fixed on the shell through a positioning check ring, and an inner ring of the external seal oil comb tooth sealing seat is tightly matched with an outer ring of the external oil slinging ring.

Preferably, the shell is also provided with a bearing temperature sensor, and the bearing temperature sensor penetrates from the outer side of the shell to the outer ring of the high-speed bearing.

According to the hydraulic dynamometer high-speed bearing lubrication sealing structure, the lubrication oil circulation system can be connected through the oil injection pipe and the lubrication vacuum suction oil return duct, the lubrication oil can be injected into the high-speed bearing through the oil injection pipe, and the inner and outer oil slingers can sling the lubrication oil into the lubrication vacuum suction oil return duct and discharge the lubrication oil, so that the lubrication oil can be prevented from leaking, the allowable rotating shaft is high in rotating speed, and the test requirements of high-power high-speed rotating machinery such as a heavy-duty gas turbine and an aeroengine can be well met.

Drawings

Fig. 1 is a schematic diagram of the internal structure of a housing of a Kong Panshi hydraulic dynamometer according to an embodiment;

FIG. 2 is a schematic illustration of a lubrication seal structure of a high-speed bearing of the hydraulic dynamometer of FIG. 1;

fig. 3 is a schematic diagram of a safety monitoring device mounted externally to a Kong Panshi hydraulic dynamometer housing in an embodiment.

Detailed Description

Fig. 1 is a schematic diagram of the internal structure of a housing 200 of a Kong Panshi hydraulic dynamometer according to an embodiment of the present utility model, which includes a housing 200, and a stator assembly 300 and a rotor assembly 400 installed in the housing 200, wherein a rotating shaft 410 of the rotor assembly 400 is rotatably installed in the housing 200 through a high-speed bearing 1200.

Referring to fig. 1-3, the present embodiment provides a lubrication seal structure for a high-speed bearing of a hydraulic dynamometer, which includes an inner seal 1100 of lubricating oil, a high-speed bearing 1200, and an outer seal 1300 of lubricating oil, which are sequentially installed between a rotating shaft and a housing 200 from an inner cavity of the housing 200 to an outer side.

The lubricant inner seal 1100 includes an inner seal oil comb seal seat 1110 and an inner oil slinger 1120, the inner oil slinger 1120 is sleeved on the rotating shaft 410, the inner seal oil comb seal seat 1110 is fixed on the housing 200 by bolts, and an inner ring of the inner seal oil comb seal seat 1110 is tightly matched with an outer ring of the inner oil slinger 1120.

An inner ring of the high-speed bearing 1200 is fixed to the rotation shaft 410, and an outer ring of the high-speed bearing 1200 is fixed to the housing 200.

The lubricating oil outer seal 1300 comprises an outer seal oil comb seal seat 1310 and an outer oil slinger 1320, wherein the outer oil slinger 1320 is sleeved on the rotating shaft 410, the outer seal oil comb seal seat 1310 is fixed on the shell 200 through a positioning retainer ring, and an inner ring of the outer seal oil comb seal seat 1310 is tightly matched with an outer ring of the outer oil slinger 1320.

The high-speed bearing lubrication sealing structure further comprises an oil spraying pipe 232 arranged on the shell 200, wherein the oil spraying pipe 232 penetrates between the lubricating oil outer seal 1300 and the high-speed bearing 1200 from the outer side of the shell 200. The casing 200 is provided with an oil sump 224 located outside the lubricant inner seal 1100, the casing 200 is provided with an oil return hole 233, and the oil sump 224 communicates with the inside of the lubricant outer seal 1300 through the oil return hole 233. The housing 200 is also provided with a lubrication vacuum pump-back oil passage 225 communicating with the oil sump 224. The housing 200 is also provided with a bearing temperature sensor 234, and the bearing temperature sensor 234 passes through the outer ring of the high-speed bearing 1200 from the outside of the housing 200 to measure the temperature of the high-speed bearing 1200. In the working process, the oil spraying pipe 232 and the lubricating vacuum suction oil return duct 225 are connected with a lubricating oil circulation system, lubricating oil can be injected into the high-speed bearing 1200 through the oil spraying pipe 232, the lubricating oil can be discharged through the lubricating vacuum suction oil return duct 225, and when the bearing temperature sensor 234 detects that the temperature of the high-speed bearing 1200 is too high, an alarm can be given to an operator to remind to check.

Aiming at the lubricating and sealing structure of the high-speed bearing, the Kong Panshi hydraulic dynamometer is also provided with a safety monitoring device for monitoring lubricating oil of the high-speed bearing 1200. Specifically, the safety monitoring device includes a line interface module 1410, a pressure sensor 1420, a temperature sensor 1430, and an acquisition control box 1440. The pipeline interface module 1410 is provided with a lubrication oil supply interface 1411 and a lubrication oil return interface 1412, the lubrication oil supply interface 1411 is communicated with the oil spray pipe 232 through a pipeline, and the lubrication oil return interface 1412 is communicated with the lubrication vacuum suction oil return duct 225 through a pipeline. The lubrication return interface 1412 is fitted with a temperature sensor 1430. The lubrication oil supply port 1411 and the lubrication oil return port 1412 are respectively connected with a pressure sensor 1420 through a pressure measuring hose 1450, and the pressure sensor 1420 is integrally mounted on an integrated mounting block 1460. The temperature sensor 1430 and the pressure sensors 1420 are connected to the collection control box 1440, respectively, and the temperature and pressure signals collected are sent to the collection control box 1440, so that the temperature and pressure of the lubricating oil can be detected. Whether the temperature of the high-speed bearing 1200 is too high can be judged according to the temperature of the lubricating oil, whether the supply pressure of the lubricating oil exceeds a set range can be monitored according to the pressure of the lubricating oil, and warning and reminding can be carried out, so that the occurrence of faults of the lubrication sealing structure of the high-speed bearing due to oil shortage can be prevented.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The high-speed bearing lubrication sealing structure of the hydraulic dynamometer is characterized by comprising a shell (200) of the hydraulic dynamometer and a rotating shaft (410), wherein a lubricating oil inner seal (1100), a high-speed bearing (1200) and a lubricating oil outer seal (1300) are sequentially sleeved between the rotating shaft (410) and the shell (200) from an inner cavity of the shell (200) to an outer side;

the oil spraying pipe (232) penetrating between the lubricating oil outer seal (1300) and the high-speed bearing (1200) from the outer side of the oil spraying pipe is arranged on the shell (200), the oil collecting groove (224) positioned on the outer side of the lubricating oil inner seal (1100) is arranged on the shell (200), the oil return hole (233) is arranged on the shell (200), the oil collecting groove (224) is communicated with the inner side of the lubricating oil outer seal (1300) through the oil return hole (233), and the lubricating vacuum pumping oil return duct (225) communicated with the oil collecting groove (224) is further arranged on the shell (200).

2. The high-speed bearing lubrication sealing structure of a hydraulic dynamometer according to claim 1, wherein the lubricating oil inner seal (1100) comprises an inner seal oil comb seal seat (1110) and an inner oil slinger (1120), the inner oil slinger (1120) is sleeved on the rotating shaft (410), the inner seal oil comb seal seat (1110) is fixed on the shell (200) through bolts, and an inner ring of the inner seal oil comb seal seat (1110) is tightly matched with an outer ring of the inner oil slinger (1120).

3. The lubrication seal structure for a high-speed bearing of a hydraulic dynamometer according to claim 1, characterized in that an inner ring of the high-speed bearing (1200) is fixed to the rotating shaft (410), and an outer ring of the high-speed bearing (1200) is fixed to the housing (200).

4. The high-speed bearing lubrication sealing structure of the hydraulic dynamometer according to claim 1, wherein the lubricating oil external seal (1300) comprises an external oil sealing comb tooth sealing seat (1310) and an external oil slinger (1320), the external oil slinger (1320) is sleeved on the rotating shaft (410), the external oil sealing comb tooth sealing seat (1310) is fixed on the shell (200) through a positioning retainer ring, and an inner ring of the external oil sealing comb tooth sealing seat (1310) is tightly matched with an outer ring of the external oil slinger (1320).

5. The high-speed bearing lubrication sealing structure of the hydraulic dynamometer according to claim 1, wherein the housing (200) is further provided with a bearing temperature sensor (234), and the bearing temperature sensor (234) penetrates through the outer ring of the high-speed bearing (1200) from the outer side of the housing (200).