CN219263911U

CN219263911U - High-precision high-temperature lubricating device of bearing tester

Info

Publication number: CN219263911U
Application number: CN202223290995.9U
Authority: CN
Inventors: 李云峰; 田澳; 李明; 李若璇; 张航; 徐新明
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-27
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses a high-precision high-temperature lubricating device of a bearing tester, which comprises five main parts, namely an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling assembly and an oil return assembly. The oil supply assembly heats normal-temperature lubricating oil in the oil tank assembly through the high-precision temperature control assembly to provide high-temperature lubricating oil for a test cavity of the tester, and the high-temperature lubricating oil in the test cavity is provided with oil return power by the oil return assembly and returns to the oil tank assembly after being cooled by the cooling assembly. The method adopts a lubricating oil high-precision secondary heating method to realize a bearing accurate high-temperature lubrication test; the rapid and accurate variable temperature lubrication test of the bearing can be realized by accurately controlling the proportion of the high-temperature lubricating oil to the normal-temperature lubricating oil through the proportional valve; the quick oil-lubricating interruption test of the bearing can be realized through the electromagnetic directional valve in the high-precision temperature control assembly, which is close to the test cavity.

Description

High-precision high-temperature lubricating device of bearing tester

Technical Field

The utility model relates to the field of aviation bearing tests, in particular to a high-precision high-temperature lubricating device of a bearing tester.

Background

With the continuous improvement of the aviation manufacturing industry level in China, the autonomous development and testing of aviation bearings with high reliability has become one of the important contents of basic equipment development plans in China. The aviation bearing has higher requirements on the aspects of working environment and safety performance, and the bearing tester is required to be used for carrying out working condition simulation tests on all aspects before the aviation bearing is put into mass production. The bearing precise high-temperature lubrication test, the bearing rapid and precise temperature-changing lubrication test and the lubricating oil interruption test are three difficult problems which cannot be wound.

At present, in a conventional high-temperature lubrication system, heat on the surface of an electric heating tube is generally used for heating lubricating oil in a manner of achieving heat exchange between the heat on the surface of the electric heating tube and the lubricating oil around the electric heating tube. The advantage of this approach is that the heating rate is very fast, but there is a great disadvantage in terms of heating accuracy, and conventional high temperature lubrication systems also lack the ability to vary temperatures for short periods of time. The utility model is put forward under the background, the system not only can realize high-precision heating and quick and accurate temperature change of the lubricating oil, but also can finish the lubricating oil interruption test of the bearing.

Disclosure of Invention

In view of the above, a main object of the present utility model is to provide a high-precision high-temperature lubrication device for a bearing tester.

To achieve the above object, the following describes the technical scheme of the present utility model in brief:

the utility model provides a high-precision high-temperature lubricating device of a bearing tester, which comprises an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling assembly and an oil return assembly, wherein the oil tank assembly is connected with the oil supply assembly;

the oil tank 1 of the oil tank assembly is internally provided with an oil tank heater 2 for heating the lubricating oil in the oil tank 1, and the oil tank 1 is internally stirred by a stirrer 18 so that the lubricating oil is heated uniformly. Two normally closed contact liquid level switches 16 are arranged in the oil tank 1 and are used for controlling the height of lubricating oil in the oil tank 1.

The oil tank 1 is also internally provided with an air dryer 19 and an oil discharge stop valve 17, the air dryer 19 is used for absorbing evaporated steam, thermal expansion and contraction of gas and corrosion to the inner wall of the oil tank are prevented, and the oil discharge stop valve 17 is used for periodically cleaning impurity particles at the bottom of the oil tank and replacing aged lubricating oil.

The oil tank 1 is connected with the inlet end of the high-precision temperature control assembly through the oil supply assembly, the outlet end of the high-precision temperature control assembly is connected with the oil return assembly through the cooling assembly, and the outlet end of the oil return assembly is connected with the oil tank 1.

In the present utility model, preferably, the first analog signal thermometer 20 and the mechanical thermometer 25 are disposed in the oil tank 1, the first analog signal thermometer 20 converts the temperature of the lubricating oil in the oil tank 1 into an electronic signal in real time to output, and the mechanical thermometer 25 can be used for manual on-site inspection and on-site debugging by controlling the on-off of the oil tank heater 2 to realize whether to heat the lubricating oil in the oil tank.

Preferably, the oil supply assembly comprises an oil supply variable pump 3, a first filter 4 and a first overflow valve 5, wherein an inlet of the oil supply variable pump 3 is arranged in the oil tank 1, an outlet of the oil supply variable pump 3 is connected with an inlet of the first filter 4, an outlet of the first filter 4 is respectively connected with an inlet of the first overflow valve 5 and the high-precision temperature control assembly, and an outlet of the first overflow valve 5 is arranged in the oil tank 1.

The high-precision temperature control assembly comprises a heat exchanger 6, a first proportional throttle valve 7, a second proportional throttle valve 24, a digital flowmeter 8, an analog signal thermometer 9, an electromagnetic heater 10, a second analog signal thermometer 11, an electromagnetic two-position four-way valve 12, a second overflow valve 21 and a test head 13. An inlet of the heat exchanger 6 is connected with an outlet of the oil supply first filter 4, and an outlet of the heat exchanger 6 is connected with an inlet of the first proportional throttle valve 7. The outlet of the first proportional throttle valve 7 is connected with a second analog signal thermometer 9, and the outlet of the first proportional throttle valve 7 is connected with the inlet of the electromagnetic heater 10. The outlet of the electromagnetic heater 10 is connected with a third analog signal thermometer 11, and the outlet of the electromagnetic heater 10 is connected with the inlet of the digital flowmeter 8. The inlet of the second proportional throttle valve 24 is connected with a pipeline between the heat exchanger 6 and the first overflow valve 5, and the outlet of the second proportional throttle valve 24 is connected with a pipeline between the electromagnetic heater 10 and the second analog signal thermometer 11. The outlet of the digital flowmeter 8 is connected with the inlet of the electromagnetic two-position four-way valve 12, one outlet of the electromagnetic two-position four-way valve 12 is connected with the oil supply inlet of the test head 13, the other outlet of the electromagnetic two-position four-way valve 12 is connected with the inlet of the second overflow valve 21 and the inlet of the cooling component, and the outlet of the second overflow valve 21 is connected with the oil tank 1.

The second analog signal thermometer 9 is used for monitoring the temperature of the lubricating oil heated by the heat exchanger 6 for the first time in real time. The magnitude of the heating current of the heat exchanger 6 is controlled by comparing the temperature signals of the second analog signal thermometer 9 with those of the first analog signal thermometer 20. The third analog signal thermometer 11 is used for monitoring the oil temperature of the secondary accurate heating of the electromagnetic heater 10. The magnitude of the electromagnetic heating current is controlled by comparing the measured temperature signals of the second analog signal thermometer 9 and the third analog signal thermometer 11. The heat exchanger 6 is used for primarily heating the lubricating oil, and the secondary accurate and rapid heating of the electromagnetic heater 10 is used for realizing the accurate high-temperature lubrication test of the bearing. The oil interruption test is completed by the quick switching of the electromagnetic two-position four-way valve 12, and the second proportional throttle valve 24 is mainly used for completing the quick and accurate temperature-changing lubrication test of the bearing.

The cooling down assembly preferably includes a fourth analog signal thermometer 23, a cooler 14 and a fan 26. The oil return outlet of the test head 13 and the fourth analog signal thermometer 23 are both connected with the inlet of the cooler 14, and the outlet of the cooler 14 is connected with the inlet of the second filter 22 of the oil return assembly. A fan 26 is arranged outside the bearing tester box body and used for reducing the pressure of a cooling system and reducing the return oil temperature of lubricating oil.

Preferably, the oil return assembly comprises an oil return variable pump 15 and a second filter 22. The inlet of the filter 22 is connected with the outlet of the cooler 14, the outlet of the second filter 22 is connected with the inlet of the oil return variable pump 15, and the outlet of the oil return variable pump 15 is arranged in the oil tank 1.

Compared with the prior art, the utility model adopts a high-precision heating control mode when heating, firstly, preheating is completed in the oil tank 1, then the heat exchanger 6 is used for further heating, the lubricating oil is ensured to be heated uniformly, and finally, the electromagnetic heater 10 is used for precise oil temperature regulation and control, so that the lubricating oil temperature is kept at a relatively accurate temperature. In the rapid and accurate temperature change process, the purpose of rapid and accurate temperature change is achieved by mixing the relatively cold oil from the oil tank 1 and the relatively hot oil heated by the heat exchanger 6 in proportion by using the second proportional throttle valve 24. Compared with the prior system, the utility model increases the lubricating oil interruption test, and uses the analog signal thermometer to feed back the temperature signal in a plurality of positions in the pipeline, thereby greatly improving the control precision of the oil temperature and improving the analog effect of the bearing tester.

Drawings

FIG. 1 is a flow chart of the present utility model.

FIG. 2 is a schematic diagram of the components of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the following flowcharts and component schematic diagrams. It should be understood that the detailed description is presented by way of example only and is not intended to limit the utility model.

The embodiment of the utility model provides a high-precision high-temperature lubricating device of a bearing tester, which is shown in figure 2 and comprises an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling assembly and an oil return assembly; as shown in fig. 2, the tank assembly includes a tank 1, a tank heater 2, a first analog signal thermometer 20, a level switch 16, an oil drain shutoff valve 17, a mechanical thermometer 25, a stirrer 18, and an air dryer 19. The tank heater 2 comprises a resistance heater which is distributed at the bottom of the tank 1 and is used for heating lubricating oil. The first analog signal thermometer 20 converts the temperature of the lubricating oil in the oil tank 1 into an electronic signal output in real time, and whether to heat the lubricating oil in the oil tank is realized by controlling the on-off of the oil tank heater 2. The oil tank assembly is externally provided with a liquid level switch 16 with two normally closed contacts and an oil discharge stop valve 17, when the liquid level of the lubricating oil exceeds the limit height of the oil tank 1, the liquid level switch 16 is closed, and the oil discharge stop valve 17 is connected to the bottom of the oil tank 1 and is used for periodically cleaning waste residues at the bottom of the oil tank 1 and replacing aged lubricating oil. Be provided with agitator 18 and air dryer 19 in the oil tank subassembly, agitator 18 is used for the smooth oil in the evenly mixed oil tank 1, guarantees the smooth oil even heating in the oil tank 1, and air dryer 19 is used for preventing the expend with heat and contract with cold of gaseous and to the corruption of oil tank inner wall.

As shown in fig. 2, the oil supply assembly comprises an oil supply variable pump 3, a first filter 4 and a first overflow valve 5, wherein an inlet of the oil supply variable pump 3 is arranged in the oil tank 1, an outlet of the oil supply variable pump 3 is connected with an inlet of the oil supply first filter 4, an outlet of the first filter 4 is respectively connected with an inlet of the high-precision temperature control assembly and an inlet of the first overflow valve 5, and an outlet of the first overflow valve 5 is arranged in the oil tank 1. The oil supply variable pump 3 extracts the heated lubricating oil in the oil tank 1, and the lubricating oil flows through the first filter 4 to filter impurities in the oil and then is conveyed to the heat exchanger 6.

As shown in fig. 2, the high-precision temperature control assembly comprises a heat exchanger 6, a lower proportional throttle valve 7, a second proportional throttle valve 24, a second analog signal thermometer 9, an electromagnetic heater 10, a third analog signal thermometer 11, a digital flowmeter 8, an electromagnetic two-position four-way valve 12, a second overflow valve 21 and a test head 13. The inlet of the heat exchanger 6 is connected with the outlet of the oil supply first filter 4, the outlet of the heat exchanger 6 is connected with the inlet of the first proportional throttle valve 7, the outlet of the first proportional throttle valve 7 is connected with the inlet of the electromagnetic heater 10 through the second analog signal thermometer 9, the outlet of the electromagnetic heater 10 is connected with the third analog signal thermometer 11, and the outlet of the electromagnetic heater 10 is connected with the inlet of the digital flowmeter 8. The inlet of the second proportional throttle valve 24 is connected with a pipeline between the heat exchanger 6 and the first overflow valve 5, and the outlet of the second proportional throttle valve 24 is connected with a pipeline between the electromagnetic heater 10 and the third analog signal thermometer 11. The outlet of the digital flowmeter 8 is connected with the inlet of the electromagnetic two-position four-way valve 12, one outlet of the electromagnetic two-position four-way valve 12 is connected with the oil supply inlet of the test head 13, the other outlet of the electromagnetic two-position four-way valve 12 is connected with the inlet of the second overflow valve 21 and the fourth analog signal thermometer 23 of the cooling assembly, and the outlet of the second overflow valve 21 is connected with the oil tank 1. The oil return outlet of the test head 13 is connected with a fourth analog signal thermometer 23.

As shown in fig. 2, the high-precision heating scheme of the lubricating oil comprises the following experimental procedures: after the lubricating oil is heated for the first time by the heat exchanger 6, the electromagnetic heater 11 further heats the lubricating oil, the second proportional throttle valve 24 is closed, the electromagnetic two-position four-way valve 12 is powered off, and the lubricating oil enters the test head 13. The second analog signal thermometer 9 is used for measuring the temperature of the lubricating oil after primary heating of the heat exchanger 6 in real time, and the third analog signal thermometer 11 is used for measuring the temperature of the lubricating oil after secondary accurate heating of the electromagnetic heater 11 in real time. The third analog signal thermometer 11 converts the temperature signal into an electric signal and feeds back to the built-in controller of the electromagnetic heater 10, the electromagnetic two-position four-way valve 12 and the built-in controller of the second proportional throttle valve 24 in real time. When the temperature of the second analog signal thermometer 9 is lower than the required temperature, the heat exchanger 6 increases the heating temperature; when the temperature of the analog signal thermometer 9 is higher than the required temperature, the heat exchanger 6 reduces the heating temperature. When the temperature of the third analog signal thermometer 11 is lower than the required temperature, the electromagnetic heater 10 increases the heating temperature; when the temperature of the third analog signal thermometer 11 is higher than the desired temperature, the electromagnetic heater 10 reduces the heating temperature.

As shown in fig. 2, the lubricating oil rapid and accurate temperature change scheme comprises the following experimental procedures: the electromagnetic two-position four-way valve 12 is powered off, and lubricating oil enters the test head 13. The first proportional throttle valve 7 is adjusted to be smaller so as to reduce the flow of high-temperature lubricating oil, the second proportional throttle valve 24 is adjusted to be larger so as to increase the flow of normal-temperature lubricating oil, and the normal-temperature lubricating oil in the oil tank is mixed with the oil heated by the heat exchanger 6 and the electromagnetic heater 10, so that the lubricating oil can be quickly warmed. The high-precision temperature control assembly performs a lubricating oil interruption test, namely short-time oil interruption is performed on the test head 13 when a high-precision heating scheme or a lubricating oil rapid and precise temperature change scheme is adopted, and the test oil interruption process of the test is as follows: the electromagnetic two-position four-way valve 12 is electrified, and the lubricating oil passes through a lower oil way of the electromagnetic two-position four-way valve 12 to rapidly cut off the oil supply of the test head 13, and the lubricating oil returns to the oil tank 1 after being cooled by the cooling component. The test recovery oil supply process of the test is as follows: the electromagnetic two-position four-way valve 12 is powered off, and the lubricating oil passes through an upper oil way of the electromagnetic two-position four-way valve 12, rapidly enters an oil inlet of the test head 13, and then returns to the oil tank 1 through an oil return outlet of the test head 13 through the cooling component.

As shown in fig. 2, the cooling down assembly includes a fourth analog signal thermometer 23, a cooler 14, and a fan 26. The oil return outlet of the test head 13 is connected with a fourth analog signal thermometer 23 and the inlet of the cooler 14, and the outlet of the cooler 14 is connected with the inlet of the second filter 22 of the oil return assembly. When the temperature monitored by the fourth analog signal thermometer 23 exceeds the set temperature value, the cooler 14 is turned on to perform cooling heat exchange, and the lubricating oil temperature is reduced. A fan 26 is arranged outside the bearing tester box body and used for reducing the pressure of a cooling system and reducing the return oil temperature of lubricating oil.

As shown in fig. 2, the scavenge assembly includes a scavenge variable pump 15 and a second filter 22. The inlet of the second filter 22 is connected with the outlet of the cooler 14, the outlet of the second filter 22 is connected with the inlet of the oil return variable pump 15, and the outlet of the oil return variable pump 15 is arranged in the oil tank 1. The oil return variable pump 15 extracts the lubricating oil which flows out from the outlet of the test head 13 and is cooled by the cooler 14, and the lubricating oil is filtered by the second filter 22 and then is conveyed to the oil return tank 1.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components: in the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the devices or elements being referred to must have specific directions, be constructed and operated in specific directions, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration, are not to be construed as limitations of the present patent, and the specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

In conclusion, the method adopts the lubricating oil high-precision secondary heating method to realize the bearing accurate high-temperature lubrication test; the ratio of the high-temperature lubricating oil to the normal-temperature lubricating oil is accurately controlled through the proportional valve, so that a bearing rapid and accurate variable-temperature lubrication test is realized; and the quick oil-lubricating interruption test of the bearing is realized through an electromagnetic reversing valve in the high-precision temperature control assembly, which is close to the test cavity. The reliability of the bearing tester is greatly improved on the basis of the three tests. The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model.

Claims

1. The high-precision high-temperature lubricating device of the bearing tester is characterized by comprising an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling assembly and an oil return assembly; the oil tank (1) of the oil tank assembly is internally provided with an oil tank heater (2), the oil tank heater (2) is used for heating the oil in the oil tank (1), the stirrer (18) is used for stirring the oil in the oil tank (1), the oil tank (1) is internally provided with a first analog signal thermometer (20) and a mechanical thermometer (25), the first analog signal thermometer (20) converts the temperature of the oil in the oil tank (1) into an electronic signal in real time and outputs the electronic signal, whether the oil in the oil tank is heated or not is realized by controlling the on-off of the oil tank heater (2), and the mechanical thermometer (25) is used for manual on-site inspection and on-site debugging; the oil supply assembly comprises an oil supply variable pump (3), a first filter (4) and a first overflow valve (5), wherein the inlet of the oil supply variable pump (3) is arranged in an oil tank (1), the outlet of the oil supply variable pump (3) is connected with the inlet of the first filter (4), the outlet of the first filter (4) is respectively connected with the inlet of a heat exchanger (6), the inlet of a second proportional throttle valve (24) and the inlet of the first overflow valve (5), the outlet of the first overflow valve (5) is connected with the oil tank (1), the inlet of the first proportional throttle valve (7) is connected with the outlet of the heat exchanger (6), the outlet of the first proportional throttle valve (7) is connected with a second analog signal thermometer (9), the outlet of the first proportional throttle valve (7) is connected with the inlet of an electromagnetic heater (10), the outlet of the electromagnetic heater (10) is connected with the inlet of a third analog signal thermometer (11), and the outlet of the electromagnetic heater (10) is connected with the inlet of a digital flowmeter (8); the inlet of the second proportional throttle valve (24) is connected with a pipeline between the heat exchanger (6) and the first overflow valve (5), and the outlet of the second proportional throttle valve (24) is connected with a pipeline between the electromagnetic heater (10) and the third analog signal thermometer (11); the outlet of the digital flowmeter (8) is connected with the inlet of the electromagnetic two-position four-way valve (12), one outlet of the electromagnetic two-position four-way valve (12) is connected with the oil supply inlet of the test head (13), the other outlet of the electromagnetic two-position four-way valve (12) is connected with the inlet of the second overflow valve (21) and the inlet of the cooling assembly, and the outlet of the second overflow valve (21) is connected with the oil tank (1); the cooling assembly comprises a fourth analog signal thermometer (23), a cooler (14) and a fan (26), wherein an oil return outlet of the test head (13) and the fourth analog signal thermometer (23) are connected with an inlet of the cooler (14), and an outlet of the cooler (14) is connected with an inlet of a second filter (22) of the oil return assembly; the oil return assembly comprises an oil return variable pump (15) and a second filter (22); the inlet of the second filter (22) is connected with the outlet of the cooler (14), the outlet of the second filter (22) is connected with the inlet of the oil return variable pump (15), and the outlet of the oil return variable pump (15) is arranged in the oil tank (1).