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

Abstract

The utility model discloses a high-precision high-temperature lubricating device for a bearing tester, which comprises five main parts: an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling and cooling assembly and an oil return assembly. The oil supply component heats the normal-temperature lubricating oil in the oil tank component through the high-precision temperature control component to provide high-temperature lubricating oil for the test chamber of the tester. Return to the fuel tank assembly after cooling down. The utility model adopts the high-precision secondary heating method of lubricating oil to realize the precise high-temperature lubrication test of the bearing; accurately controls the ratio of high-temperature lubricating oil and normal temperature lubricating oil through the proportional valve to realize the fast and accurate temperature-variable lubricating test of the bearing; through the high-precision temperature control component The electromagnetic reversing valve close to the test chamber can realize the fast lubricating oil interruption test of the bearing.

Description

A high-precision high-temperature lubrication device for a 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 for a bearing tester.

Background technique

With the continuous improvement of the level of my country's aviation manufacturing industry, the independent development and testing of high-reliability aviation bearings has become one of the important contents of my country's basic equipment development plan. Aeronautical bearings have higher requirements on the working environment and safety performance. Before mass production, it is necessary to use a bearing tester to carry out working condition simulation tests on all aspects. Among them, the precise high-temperature lubrication test of bearings, the fast and accurate variable temperature lubrication test of bearings and the oil interruption test are three difficult problems that cannot be avoided.

At present, in conventional high-temperature lubrication systems, the heat exchanged between the surface of the electric heating tube and the surrounding lubricating oil is usually used to heat the lubricating oil. The advantage of this method is that the heating speed is very fast, but it has a great deficiency in heating accuracy, and the conventional high-temperature lubrication system also lacks the ability to change temperature in a short time. In this background, the utility model is proposed. This system can not only realize the high-precision heating and rapid and accurate temperature change of the lubricating oil, but also complete the lubricating oil interruption test of the bearing.

Utility model content

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

In order to achieve the above object, the technical scheme of the utility model is briefly described below:

The utility model provides a high-precision high-temperature lubrication device for a bearing tester, which includes an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling and cooling assembly, and an oil return assembly;

The fuel tank 1 of the fuel tank assembly is provided with a fuel tank heater 2 for heating the lubricating oil in the fuel tank 1, and the fuel tank 1 is stirred by an agitator 18 to make the lubricating oil evenly heated. The oil tank 1 is provided with two liquid level switches 16 with normally closed contacts for controlling the lubricating oil level in the oil tank 1 .

The oil tank 1 is also provided with an air dryer 19 and an oil discharge shut-off valve 17. The air dryer 19 is used to absorb evaporated water vapor, prevent thermal expansion and contraction of the gas and corrosion of the inner wall of the oil tank, and the oil discharge shut-off valve 17 is used to regularly clean up the impurity particles at the bottom of the oil tank and replace the aging lubricating oil.

The oil tank 1 is connected to 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 to the oil return assembly through the cooling and cooling assembly, and the outlet end of the oil return assembly is connected to the oil tank 1 .

Preferably, the fuel tank 1 is provided with a first analog signal thermometer 20 and a mechanical thermometer 25. The first analog signal thermometer 20 converts the temperature of the lubricating oil in the fuel tank 1 into an electronic signal output in real time, and controls the heating of the fuel tank. Whether the lubricating oil in the oil tank is heated by switching on and off the power of the device 2, the mechanical thermometer 25 can be used for manual on-site inspection and on-site debugging.

Preferably in the utility model, the oil supply assembly includes a variable oil supply pump 3, a first filter 4 and a first overflow valve 5, the inlet of the variable oil supply pump 3 is placed in the oil tank 1, and the oil supply variable pump 3 The outlet of the variable pump 3 is connected to the inlet of the first filter 4, and the outlet of the first filter 4 is respectively connected to the inlet of the first overflow valve 5 and the high-precision temperature control assembly, and the first overflow valve 5 The outlet of is placed in the fuel tank 1.

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

The second analog signal thermometer 9 is used for real-time monitoring of the lubricating oil temperature initially heated by the heat exchanger 6 . The heating current of the heat exchanger 6 is controlled by comparing the temperature signals of the second analog signal thermometer 9 and the first analog signal thermometer 20 . The third analog signal thermometer 11 is used to monitor the lubricating oil temperature of the secondary precise 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 lubricating oil is initially heated through the heat exchanger 6, and the secondary precise and rapid heating of the electromagnetic heater 10 realizes the precise high-temperature lubrication test of the bearing. The lubricating oil interruption test is completed through the rapid switching of the electromagnetic two-position four-way valve 12, and the second proportional throttle valve 24 is mainly used to complete the rapid and accurate variable temperature lubrication test of the bearing.

Preferably in the present invention, the cooling and cooling component includes a fourth analog signal thermometer 23 , a cooler 14 and a fan 26 . Both the oil return outlet of the test head 13 and the fourth analog signal thermometer 23 are connected to the inlet of the cooler 14, and the outlet of the cooler 14 is connected to the inlet of the second filter 22 of the oil return assembly. A fan 26 is arranged outside the casing of the bearing tester to reduce the pressure of the cooling system and reduce the oil return temperature of the lubricating oil.

Preferably in the present invention, the oil return assembly includes a variable oil return pump 15 and a second filter 22 . The inlet of the filter 22 is connected to the outlet of the cooler 14 , the outlet of the second filter 22 is connected to the inlet of the oil return variable pump 15 , and the outlet of the oil return variable pump 15 is placed in the oil tank 1 .

Compared with the prior art, the utility model adopts a high-precision control heating method when heating up, first completes the preheating in the oil tank 1, and then uses the heat exchanger 6 to further raise the temperature to ensure that the lubricating oil is evenly heated, and finally adopts electromagnetic heating The device 10 performs precise oil temperature regulation, so that the oil temperature of the lubricating oil can be maintained at a relatively accurate temperature. When the temperature is changed quickly and accurately, by adopting the method of mixing oil to lower the temperature, the second proportional throttle valve 24 is used to mix the relatively cold oil from the oil tank 1 and the relatively hot oil heated up by the heat exchanger 6 in proportion to achieve rapid and accurate temperature change. Purpose. Compared with the previous system, the utility model adds a lubricating oil interruption test, and uses analog signal thermometers in multiple places in the pipeline to perform real-time feedback on the temperature signals, which greatly improves the control accuracy of the oil temperature and improves the performance of the bearing tester. Simulation effect.

Description of drawings

Fig. 1 is a flowchart of the utility model.

Fig. 2 is a schematic diagram of components of the utility model.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in combination with the flow chart and the schematic diagram of components. It should be understood that the specific implementation system described here is only used to explain the utility model, and is not intended to limit the utility model.

The embodiment of the utility model provides a high-precision high-temperature lubrication device for a bearing tester, as shown in Figure 2, including an oil tank assembly, an oil supply assembly, a high-precision temperature control assembly, a cooling and cooling assembly, and an oil return assembly; as shown in Figure 2 As shown, the fuel tank assembly includes a fuel tank 1, a fuel tank heater 2, a first analog signal thermometer 20, a liquid level switch 16, an oil discharge stop valve 17, a mechanical thermometer 25, an agitator 18 and an air dryer 19. The fuel tank heater 2 includes a resistance heater distributed at the bottom of the fuel tank 1 for heating lubricating oil. The first analog signal thermometer 20 converts the temperature of the lubricating oil in the fuel tank 1 into an electronic signal output in real time, and realizes whether to heat the lubricating oil in the fuel tank by controlling the power on and off of the fuel tank heater 2 . A liquid level switch 16 with two normally closed contacts and an oil discharge cut-off valve 17 are arranged outside the oil tank assembly. When the liquid level of lubricating oil exceeds the limited 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 to regularly clean up the waste residue at the bottom of the oil tank 1 and replace the aging lubricating oil. The fuel tank assembly is provided with an agitator 18 and an air dryer 19, the agitator 18 is used to evenly mix the lubricating oil in the fuel tank 1 to ensure uniform heating of the lubricating oil in the fuel tank 1, and the air drier 19 is used to prevent thermal expansion of the gas Cold shrinkage and corrosion to the inner wall of the tank.

As shown in Figure 2, the oil supply assembly includes an oil supply variable pump 3, a first filter 4 and a first overflow valve 5, the inlet of the oil supply variable pump 3 is placed in the oil tank 1, the oil supply The outlet of the variable displacement pump 3 is connected to the inlet of the first oil supply filter 4, and the outlet of the first filter 4 is respectively connected to the inlet of the high-precision temperature control assembly and the inlet of the first overflow valve 5, and the first The outlet of overflow valve 5 is placed in oil tank 1. The oil supply variable pump 3 extracts the heated lubricating oil in the oil tank 1 , flows through the first filter 4 to filter the impurities in the oil, and then sends it to the heat exchanger 6 .

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

As shown in Figure 2, the high-precision heating scheme of the lubricating oil, the test process of this test is: after the lubricating oil is heated for the first time by the heat exchanger 6, the electromagnetic heater 11 further heats the lubricating oil, and the second proportional throttle valve 24 is closed, the electromagnetic two-position four-way valve 12 is de-energized, and lubricating oil enters the test head 13. The second analog signal thermometer 9 is used for real-time measurement of the lubricating oil temperature after the primary heating of the heat exchanger 6, and the third analog signal thermometer 11 is used for real-time measurement of the lubricating oil temperature after the secondary precise heating of the electromagnetic heater 11 . The third analog signal thermometer 11 converts the temperature signal into an electrical signal and feeds it back to the built-in controller of the electromagnetic heater 10 , the built-in controller of the electromagnetic two-position four-way valve 12 and 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 decreases the heating temperature. When the temperature of the third analog signal thermometer 11 was lower than the required temperature, the electromagnetic heater 10 increased the heating temperature; when the temperature of the third analog signal thermometer 11 was higher than the required temperature, the electromagnetic heater 10 decreased the heating temperature .

As shown in FIG. 2 , the fast and accurate temperature change scheme of lubricating oil, the test process of this test is: the electromagnetic two-position four-way valve 12 is powered off, and the lubricating oil enters the test head 13 . The first proportional throttle valve 7 is turned down to reduce the flow rate of high-temperature lubricating oil, and the second proportional throttle valve 24 is turned up to increase the flow rate of normal-temperature lubricating oil. The oil heated by the device 10 is mixed to realize rapid temperature change of the lubricating oil. The lubricating oil interruption test of the high-precision temperature control component refers to the short-term oil interruption of the test head 13 when the high-precision heating scheme or the rapid and accurate lubricating oil temperature change scheme is adopted. The test oil interruption process of this test is: electromagnetic two-position The four-way valve 12 is energized, and the lubricating oil passes through the lower oil circuit of the electromagnetic two-position four-way valve 12 to quickly 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 this test is: the electromagnetic two-position four-way valve 12 is powered off, the lubricating oil passes through the upper oil circuit of the electromagnetic two-position four-way valve 12, the lubricating oil quickly enters the oil inlet of the test head 13, and then passes through The oil return outlet of the test head 13 returns to the oil tank 1 through the cooling cooling assembly.

As shown in FIG. 2 , the cooling and cooling 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 the 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 for cooling and heat exchange to reduce the lubricating oil temperature. A fan 26 is arranged outside the casing of the bearing tester to reduce the pressure of the cooling system and reduce the oil return temperature of the lubricating oil.

As shown in FIG. 2 , the oil return assembly includes an oil return variable pump 15 and a second filter 22 . The inlet of the second filter 22 is connected to the outlet of the cooler 14 , the outlet of the second filter 22 is connected to the inlet of the oil return variable pump 15 , and the outlet of the oil return variable pump 15 is placed in the oil tank 1 . The oil return variable pump 15 extracts the lubricating oil cooled by the cooler 14 flowing out of the outlet of the test head 13 , and sends the impurities in the oil back to the oil tank 1 after being filtered by the second filter 22 .

In the drawings of this embodiment, the same or similar symbols correspond to the same or similar parts: in the description of the utility model, it should be understood that the terms "upper", "lower", "left", "right", " The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have Specific orientation, construction and operation in a specific orientation, so the terms describing the positional relationship in the drawings are only for illustrative purposes, and should not be understood as limitations on this patent. For those of ordinary skill in the art, the Understand the specific meaning of the above terms.

In summary, the utility model adopts the high-precision secondary heating method of lubricating oil to realize the precise high-temperature lubrication test of bearings; through the proportional valve to accurately control the ratio of high-temperature lubricating oil to normal-temperature lubricating oil to realize the rapid and accurate variable-temperature lubricating test of bearings; through high-precision The electromagnetic reversing valve close to the test chamber in the temperature control assembly realizes the fast lubricating oil interruption test of the bearing. On the basis of the above three tests, the reliability of the bearing tester will be greatly improved. The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model.

Claims (1)

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).

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