阅读说明：本技术 一种测试回油泵组在油气掺混条件下回油能力的试验器 (Tester for testing oil return capacity of oil return pump set under oil-gas mixing condition ) 是由 张明胜 阳开华 李晓水 常亮 于 2019-10-10 设计创作，主要内容包括：本发明属于机械设计技术领域,具体涉及一种测试回油泵组在油气掺混条件下回油能力的试验器。该试验器包括：主油箱、掺混油箱、电机、回油泵组、第一启动泵组、第二启动组泵、气动阀、手动调节阀、电动调节阀、压力传感器、流量传感器。该方案当总回油压力逐渐升高时,回油泵组的回油性能降低(直至不进行抽油动作),测量回油压力的极限值,确保回油泵组在极限条件下满足飞机使用需求。(The invention belongs to the technical field of mechanical design, and particularly relates to a tester for testing oil return capacity of an oil return pump set under an oil-gas mixing condition. The tester comprises: the system comprises a main oil tank, a blending oil tank, a motor, an oil return pump set, a first starting pump set, a second starting pump set, a pneumatic valve, a manual regulating valve, an electric regulating valve, a pressure sensor and a flow sensor. According to the scheme, when the total oil return pressure is gradually increased, the oil return performance of the oil return pump unit is reduced (until no oil pumping action is performed), the limit value of the oil return pressure is measured, and the oil return pump unit is ensured to meet the use requirement of an airplane under the limit condition.)

1. The utility model provides a test oil return pump package is at tester of oil gas mixing condition oil return ability which characterized in that includes: the system comprises a main oil tank, a blending oil tank, a motor, an oil return pump set, a first starting pump set, a second starting pump set, a pneumatic valve, a manual regulating valve, an electric regulating valve, a pressure sensor and a flow sensor;

the first starting pump set simulates an oil return pump set opposite flushing oil path, lubricating oil is extracted from a main oil tank and is in opposite flushing with blended lubricating oil output by the second starting pump set, and the output flow of the first starting pump set is set as the maximum oil extraction amount of the oil return pump set;

a second starting pump set extracts lubricating oil in the main oil tank, the lubricating oil is respectively limited by a manual regulating valve, and then the lubricating oil is sprayed on the inner walls of the two blending oil tanks through nozzles of the blending oil tanks to obtain blended lubricating oil; the motor drives the oil return pump set to extract the blended lubricating oil of the two blended oil tanks and the oil gas of one blended oil tank; the flow sensors are respectively arranged on the mixing oil paths from the two mixing oil tanks to the oil return pump set, and the total output oil path of the oil return pump set is provided with a pressure sensor; the electric regulating valve manually regulates the opening when the rotating speed of the oil return pump set is increased to the highest working rotating speed so as to change the flow of the two mixing oil ways;

when the flow sensor detects that the flow of the two mixing oil ways is 0, the instantaneous pressure value detected by the pressure sensor is recorded.

2. The tester of claim 1, further comprising: the temperature sensor is used for detecting the temperature of the lubricating oil in the main oil tank and is arranged on the main oil tank.

3. The tester of claim 2, wherein the main tank is integrated with a heater for heating the lubricant in the main tank.

4. The tester of claim 1, wherein the flow rates of the lubricating oil after the flow limitation of the manual regulating valve are respectively as follows: 6L/min and 8L/min, and the maximum oil extraction amount is 80L/min.

5. The tester of claim 1, wherein the oil return pump package comprises: the 3-stage pump is used for respectively pumping the blending lubricating oil of the two blending oil tanks and the oil gas of one blending oil tank; the two mixed lubricating oils simulate the lubricating oil of an airplane accessory case and the lubricating oil of an engine accessory case, and the oil gas simulates the lubricating oil of a centrifugal ventilator.

6. The tester of claim 1, wherein pneumatic valves are provided on the blending oil path and the oil and gas path from the blending oil tank.

7. The tester of claim 1, further comprising: a vacuum pump for pumping lubricating oil from the main oil tank;

the main oil tank outputs three oil ways as three outputs of an oil return pump set; and the three-way output is provided with a pneumatic valve so as to adjust the flow of the three-way output.

8. The tester according to claim 1 or 6, wherein the flow sensor and the pressure sensor are arranged at the three-way inlet of the recirculating pump, at the input of the second set of start-up pumps, at the inlet of the two blend tanks.

Technical Field

The invention belongs to the technical field of mechanical design, and particularly relates to a tester for testing oil return capacity of an oil return pump set under an oil-gas mixing condition.

Background

At present, a lubricating oil pump tester mainly has the ground performance and high-altitude performance test functions so as to detect performance parameters of a lubricating oil pump in a ground full-oil state. In the actual working process, due to the influence of factors such as flight attitude and the like, the engine lubricating oil is in an oil-gas mixing state, the performance requirement on the lubricating oil pump is higher, and the performance parameters of the lubricating oil pump under the oil-gas mixing condition need to be detected so as to ensure the working stability and performance limit of the lubricating oil pump.

Disclosure of Invention

The purpose of the invention is: the invention aims to design a brand-new oil-gas mixing tester on the basis of the existing lubricating oil pump test principle, which can meet the test requirements of ground performance and high-altitude performance in a full-oil state, can also detect that the oil return performance of an oil return pump unit is reduced (until no oil pumping action is performed) when the total oil return pressure of the oil return pump unit is gradually increased under the oil-gas mixing condition, measures the limit value of the oil return pressure, and ensures that the oil return pump unit meets the use requirements of an airplane under the limit condition.

In a first aspect, a tester for testing oil return capacity of an oil return pump set under oil and gas mixing conditions is provided, and comprises: the system comprises a main oil tank, a blending oil tank, a motor, an oil return pump set, a first starting pump set, a second starting pump set, a pneumatic valve, a manual regulating valve, an electric regulating valve, a pressure sensor and a flow sensor;

the first starting pump set simulates an oil return pump set opposite flushing oil path, lubricating oil is extracted from a main oil tank and is in opposite flushing with blended lubricating oil output by the second starting pump set, and the output flow of the first starting pump set is set as the maximum oil extraction amount of the oil return pump set; a second starting pump set extracts lubricating oil in the main oil tank, the lubricating oil is respectively limited by a manual regulating valve, and then the lubricating oil is sprayed on the inner walls of the two blending oil tanks through nozzles of the blending oil tanks to obtain blended lubricating oil; the motor drives the oil return pump set to extract the blended lubricating oil of the two blended oil tanks and the oil gas of one blended oil tank; the flow sensors are respectively arranged on the mixing oil paths from the two mixing oil tanks to the oil return pump set, and the total output oil path of the oil return pump set is provided with a pressure sensor; the electric regulating valve manually regulates the opening when the rotating speed of the oil return pump set is increased to the highest working rotating speed so as to change the flow of the two mixing oil ways;

when the flow sensor detects that the flow of the two mixing oil ways is 0, the instantaneous pressure value detected by the pressure sensor is recorded.

Further, the method also comprises the following steps: the temperature sensor is used for detecting the temperature of the lubricating oil in the main oil tank and is arranged on the main oil tank.

Furthermore, a heater is integrated on the main oil tank and used for heating lubricating oil in the main oil tank.

Further, the flow of the lubricating oil after the flow limitation of the manual regulating valve is respectively as follows: 6L/min and 8L/min, and the maximum oil extraction amount is 80L/min.

Further, the oil return pump package includes: the 3-stage pump is used for respectively pumping the blending lubricating oil of the two blending oil tanks and the oil gas of one blending oil tank; the two mixed lubricating oils simulate the lubricating oil of an airplane accessory case and the lubricating oil of an engine accessory case, and the oil gas simulates the lubricating oil of a centrifugal ventilator.

Further, pneumatic valves are arranged on the blending oil way and the oil-gas oil way from the blending oil tank.

Further, the method also comprises the following steps: a vacuum pump for pumping lubricating oil from the main oil tank;

the main oil tank outputs three oil ways as three outputs of an oil return pump set; and the three-way output is provided with a pneumatic valve so as to adjust the flow of the three-way output.

Furthermore, a flow sensor and a pressure sensor are arranged at three inlets of the oil return pump, at the input of the second starting pump set and at the inlets of the two blending oil tanks.

ADVANTAGEOUS EFFECTS OF INVENTION

This novel tester structural design also can reform transform on current ground performance tester, has that the transformation cost is low, the transformation cycle is short, normal test and the experimental advantage that all can go on of oil gas mixing, has further strengthened the limit examination to oil return pump package performance parameter, has ensured the stability and the performance of oil return pump package work on engine and aircraft.

Drawings

FIG. 1 is a schematic structural diagram of a tester for testing the oil return capacity of an oil return pump set under oil-gas mixing conditions;

fig. 2 is a schematic structural diagram of a tester for testing the oil return capacity of an oil return pump set under oil-gas mixing conditions.

Detailed Description

As shown in fig. 1-2, the present invention is directed to a type of oil return pump assembly, which consists of 3-stage pumps for respectively pumping the oil from the aircraft accessory casing, the engine accessory casing, and the centrifugal ventilator. When the oil pump test is carried out, firstly, the air-operated valves KQ1, KQ2 and KQ3 are opened, the air-operated valves KQ4, KQ5 and KQ6 are closed, and a first starting pump group BZ1 is arranged, is used for simulating a counter oil way of a return oil pump group, and has the flow rate set to the maximum oil pumping amount (80L/min) of the return oil pump group. The second time it starts the pump set BZ2 which is used to supply oil to two blend tanks. The blending oil tank simulates an airplane accessory casing and an engine accessory casing, lubricating oil is sprayed on the inner wall of the blending oil tank from an oil inlet through a nozzle to form the blending lubricating oil, and the flow rate is adjusted to 6L/min and 8L/min through manual adjusting valves K1 and K2. And starting a motor, driving an oil return pump set to extract lubricating oil of the mixing oil tank, wherein the I-level pump and the II-level pump respectively extract a lubricating oil mixture at the bottoms of the mixing oil tank 1 and the mixing oil tank 2, and the III-level pump extracts oil gas at the upper part of the mixing oil tank 1. When the rotating speed of the oil return pump group is increased to the highest working rotating speed, the opening degree of an electric regulating valve KD1 is adjusted, the pressure of P6 is gradually increased, the flow rates of Q3 and Q4 are observed, when the flow rates of Q3 and Q4 are zero, the lubricating oil in the pipeline does not flow, the instantaneous pressure of P6 is recorded as the limit oil absorption capacity of the oil return pump group under the oil-gas mixing condition, the working capacity of the oil return pump group is directly reflected by the pressure of P6, the advantages and the disadvantages are saved, and the quality of aviation products is ensured.

When the pneumatic valves KQ1, KQ2 and KQ3 are closed and the pneumatic valves KQ4, KQ5 and KQ6 are opened, the pump sets BZ1 and BZ2 do not operate, the oil return pump sets directly extract lubricating oil at the bottom of the oil tank, and at the moment, ground performance and high-altitude performance tests before the product leaves a factory can be carried out to detect the product quality.

Therefore, the novel tester can be used for normal full-oil performance tests and oil-gas mixing tests, and the test quality is greatly improved.

The improved oil-return pump set tester can meet the oil-gas mixing test, the running-in test, the ground performance test and the high-altitude performance test of a certain oil-return pump set, complete the test tasks of more than 10 oil-return pump set products, has good effect, can detect the oil-return capacity of the oil-return pump set under the oil-gas mixing condition, and can be used by being installed on an airplane without performance deficiency, thereby proving that the improved oil-return pump set tester has good effect.