Starter output shaft overrunning rotation test bench with posture function

Abstract

The invention belongs to the technical field of power systems, and relates to a starter output shaft overrunning rotation test bed with a posture function, which comprises an output shaft overrunning rotation driving system, a lubricating oil filling system, a posture system and a measurement and control system, the output shaft overrunning rotation driving system is connected with the starter and drives an output shaft of the starter to rotate at a high speed, the rotating speed is adjustable, and stability is kept at the specified rotating speed. The lubricating oil filling system is connected with the starter and provides lubricating oil with specified temperature and flow for the starter; a starter and an output shaft overrunning rotation driving system are mounted on the attitude system, and attitude conditions of a specified angle are provided for the starter; the measurement and control system is connected with the output shaft overrunning rotation driving system, the lubricating oil filling system, the attitude system and the starter, controls the output shaft overrunning rotation driving system, the lubricating oil filling system and the attitude system, enables all the systems to run reliably according to a test program, and collects test data of the starter.

Description

Technical Field

[0001] The invention belongs to the technical field of power systems and relates to a starter output shaft overrunning rotation test bench with a posture function. Background Art

[0002] The air turbine starter is a commonly used aircraft engine starting device, mainly used for ground starting, cold running, false starting and air auxiliary starting of the engine. Its working principle is: when starting the engine, compressed gas of a certain pressure and temperature enters the starter, blows the turbine, uses the compressed gas to expand and do work, obtains shaft power through the turbine stage expansion work, transmits power through the reduction gear system and clutch, and finally outputs torque to drive the engine. When the engine reaches a certain speed, the starter is no longer needed to wait for rotation. At this time, the turbine and reducer of the starter are in a stopped working state, and the output shaft still rotates with the engine. This state is called "output shaft overrunning rotation". In this state, in order to prevent the turbine, reducer, etc. inside the starter from being continued to be driven by the engine, a clutch is provided between the reduction gear system and the output shaft. The clutch can transmit the starting torque to the engine during starting and prevent the engine from reversely driving the starter when the output shaft overruns. The starter output shaft overrunning rotation test bench is used to carry out various tests of the starter under the output shaft overrunning rotation condition.

[0003] The existing output shaft overrunning rotation test bench does not have the function of attitude adjustment and can only simulate the horizontal attitude. Some working conditions inside the starter that occur under other attitude conditions cannot be simulated, such as the relative level of lubricating oil, the stress of components such as bearings, gears, clutches, and the vibration level of the shaft system. At the same time, the heat level, sealing ability, oil supply capacity of the internal lubricating oil pump, and the life of various components of the starter under the output shaft overrunning rotation working condition, the relationship between these issues and the starter attitude cannot be clearly verified through the horizontal attitude output shaft overrunning rotation test bench. Summary of the invention

[0004] Purpose of the invention: The purpose of the invention is to provide a starter output shaft overrunning rotation test bench with a posture function, which is used to solve the problems existing in the prior art.

[0005] Technical solution:

[0006] A starter output shaft overrunning rotation test bench with attitude function, comprising an output shaft overrunning rotation drive system, a lubricating oil filling system, an attitude system, and a measurement and control system;

[0007] The output shaft exceeds the rotation drive system and is connected to the starter, driving the output shaft of the starter to rotate at high speed, the speed is adjustable, and remains stable at a specified speed;

[0008] The lubricating oil filling system is connected to the starter to provide the starter with lubricating oil of specified temperature and flow rate;

[0009] The starter and the output shaft overrunning rotation drive system are installed on the posture system to provide a posture condition of a specified angle for the starter;

[0010] The measurement and control system is respectively connected to the output shaft overrunning rotation drive system, the lubricating oil filling system, the attitude system and the starter to control the output shaft overrunning rotation drive system, the lubricating oil filling system and the attitude system so that each system can operate reliably according to the test procedure and collect the starter test data.

[0011] Furthermore, the output shaft overrunning rotation drive device is composed of a high-speed electric spindle, an oil-gas lubricator, a cooling device, and a base. A mounting base for mounting the high-speed electric spindle is provided on the base. The high-speed electric spindle is mounted on the mounting base. The output shaft of the high-speed electric spindle is connected to the output shaft of the starter through a coupling. The high-speed electric spindle provides the speed required for the test. The oil-gas lubricator is connected to the high-speed electric spindle. The oil-gas lubricator provides oil mist lubrication for the high-speed electric spindle. The cooling device is connected to the high-speed electric spindle. The cooling device controls the temperature of the high-speed electric spindle during operation by cooling water.

[0012] Furthermore, a mounting stop 1 is provided on the base, and a mounting stop 2 is provided on the mounting base. The starter is installed in the mounting stop 1, and the high-speed electric spindle is installed in the mounting stop 2. The mounting stop 1 and the mounting stop 2 are coaxially arranged to ensure the coaxiality of the starter and the high-speed electric spindle, so that the starter output shaft has small vibration during over-rotation and runs smoothly.

[0013] Furthermore, reinforcing ribs are provided on the sides of the base, and bolt holes for connecting with the attitude system are provided on the bottom of the base.

[0014] Furthermore, the lubricating oil filling system includes three oil circuits with the same structure, and the oil circuits include an oil tank, an oil supply pump, a flow meter, an oil supply filter, an oil return filter, an oil return pump and a bypass valve. The flow meter is connected to the oil supply filter through a regulating valve, the oil supply filter is connected to the oil supply pump, the oil supply pump is connected to the oil tank outlet through a valve, the oil tank inlet is connected to the return oil filter and the return oil pump in sequence, one end of the bypass valve is connected to the oil supply filter outlet, and the other end is connected to the oil tank; the flow meter is connected to the starter oil inlet through a pipeline heater, and the starter oil outlet is connected to the return oil pump through a radiator.

[0015] Furthermore, a temperature sensor and a pressure sensor are arranged on the pipeline connecting the pipeline heater and the starter oil inlet; an oil extraction port is arranged on the pipeline connecting the pipeline heater and the starter oil inlet, an oil extraction port is arranged on the pipeline connecting the starter oil outlet and the radiator, and a temperature sensor is arranged on the pipeline connecting the starter oil outlet and the radiator.

[0016] Furthermore, the attitude system includes an upper platform, an upper hinge, a cross axis, a servo electric cylinder, a lower hinge and a bracket. There are two servo electric cylinders. The bottom end of the servo electric cylinder is hinged to the lower end of the bracket through the lower hinge. The cross axis includes a roll axis and a pitch axis.

[0017] Two symmetrical mounting lugs are arranged at the bottom of the upper table, and the two mounting lugs are respectively connected to the two ends of the rolling shaft, and the rolling shaft is connected to the lead screw of one of the servo electric cylinders through the upper hinge, and the lead screw of the other servo electric cylinder is connected to the bottom of the upper platform;

[0018] Two symmetrical mounting lugs are arranged on the top of the bracket, the pitch axis vertically passes through the roll axis, and the two mounting lugs are respectively connected to the two ends of the pitch axis;

[0019] Two sets of servo electric cylinders are used to realize the swing of the upper platform in two degrees of freedom: pitch and roll.

[0020] Furthermore, the measurement and control system obtains the movement amount of the servo electric cylinder and generates a control instruction through real-time kinematics solution. The control instruction is output by the embedded controller after signal conditioning to drive the servo system to achieve the desired motion posture;

[0021] The measurement and control system includes a posture control module, which includes a user computer, an embedded controller, a signal conditioning unit, and a drive system that are electrically connected in sequence. The user inputs control instructions to the computer, and the embedded controller completes signal acquisition and output of control quantities. The signal is output to the drive system via the signal conditioning unit. The drive system realizes control of the current loop, speed loop and position loop inside. Finally, the servo motor drives the electric cylinder to perform displacement movement to control the posture of the upper table.

[0022] Furthermore, the drive system includes a servo drive module, a servo motor, a servo electric cylinder and an angle encoder. The servo drive module receives the output signal of the signal conditioning unit, and the angle encoder collects the rotation speed of the servo motor and feeds it back to the servo drive module.

[0023] Beneficial effects:

[0024] The present invention provides a starter output shaft overrunning rotation test bench with attitude function, which is mainly composed of four parts: an output shaft overrunning rotation drive system, a lubricating oil filling system, an attitude system, and a measurement and control system. The output shaft overrunning rotation drive system is used to rotate the output shaft of the starter, the lubricating oil filling system provides lubricating oil of specified temperature and flow rate for the starter, the attitude system is used to adjust the attitude of the starter, and the measurement and control system controls each controlled component of the test bench so that the entire system can operate reliably according to the test procedure.

[0025] The output shaft overrunning rotation drive system is mainly composed of a base, a mounting base, a high-speed electric spindle, a matching oil-gas lubricator, and a cooling device. The high-speed electric spindle provides the speed required for the test, the oil-gas lubricator provides oil mist lubrication for the high-speed electric spindle, the cooling device controls the temperature of the high-speed electric spindle during operation, and the mounting base ensures the coaxiality between the starter and the high-speed electric spindle, so that the starter output shaft has small vibration and stable operation when overrunning.

[0026] The lubricating oil filling system consists of three oil circuits, each of which runs a lubricating oil medium. The entire lubricating oil filling system can quickly switch between the three lubricating oil media. Each oil circuit contains an oil tank, an oil supply pump, an oil return pump, a circulation pump, a filter, and a valve. The oil supply pump fills the starter with lubricating oil, and the oil return pump draws the lubricating oil from the starter back to the oil tank. The valve is used to adjust the flow of lubricating oil. The three oil lines are combined into a pipeline heater, and only one line is connected to the pipeline heater at the same time. The lubricating oil filling system controls the temperature of the lubricating oil through the pipeline heater and the matching thyristor controller.

[0027] The attitude system is used to adjust the attitude of the starter output shaft during the overrunning rotation test. It is mainly composed of an upper platform, upper and lower hinges, a cross shaft, a bracket, and two sets of servo electric cylinders, of which the servo electric cylinder is an important component of attitude control. The electric cylinder adopts the feedback control method of the displacement sensor to achieve the purpose of high-precision attitude control.

[0028] The measurement and control system is used to control the entire test bench so that it can run according to the specified test program. The measurement and control system mainly includes a host computer, a frequency converter, an embedded controller, a servo control unit, a signal conditioning unit, a control system software, etc. The parameters collected and controlled mainly include the electric spindle speed, lubricating oil pressure, lubricating oil flow, lubricating oil temperature, platform pitch angle, platform roll angle, etc. The measurement and control system obtains the actuator movement and generates control instructions through real-time kinematic solution (kinematic position feedback). The control instructions are output by the servo control unit after signal conditioning to drive the servo system to achieve the desired motion posture. At the same time, the servo control unit collects the displacement, speed and other parameters of the actuator in real time to realize the monitoring and protection of the platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the overall structure diagram of the test bench of the present invention;

[0030] Among them, 1-output shaft overrunning rotation drive system, 2-attitude system, 3-starter;

[0031] Figure 2 It is a schematic diagram of the output shaft overrunning rotation driving system of the present invention;

[0032] Among them, 4-base, 5-mounting base, 6-high-speed electric spindle;

[0033] Figure 3 This is a schematic diagram of the principle of the lubricating oil filling system of the present invention;

[0034] 7-return oil pump, 8-bypass valve, 9-pipeline heater, 10-radiator, 11-temperature sensor, 12-pressure sensor, 13-oil inlet, 14-oil tank, 15-oil supply pump, 16-flow meter, 17-oil supply filter, 18-regulating valve, 19-return oil filter;

[0035] Figure 4 It is a structural diagram of the posture system of the present invention;

[0036] 20-upper platform, 21-upper hinge, 22-cross shaft, 23-servo electric cylinder, 24-lower hinge, 25-bracket;

[0037] Figure 5 It is a logic block diagram of the attitude control system of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The purpose of the present invention is to provide a starter output shaft overrunning rotation test bench with attitude function to solve the problems existing in the prior art. Mainly, by integrating the output shaft overrunning rotation drive system 1, the lubricating oil filling system, the attitude system 2, and the measurement and control system, the purpose of simulating the starter 3 to perform an output shaft overrunning rotation test under different attitude conditions is achieved. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] like Figure 1 As shown, the operation of the present invention depends on four parts: the output shaft overrunning rotation drive system 1, the lubricating oil filling system, the attitude system 2, and the measurement and control system. The output shaft overrunning rotation drive system 1 is installed as a whole on the platform of the attitude system 2, and the attitude system 2 is fixed on the foundation. The lubricating oil filling system is connected to the starter 3 through a hose and does not move with the attitude system 2. The entire test bench is connected to the measurement and control system through cables and the like and is controlled by the measurement and control system.

[0041] like Figure 2As shown, the output shaft overrunning rotation drive system 1 is used to drive the output shaft of the starter 3 to rotate at high speed, and is mainly composed of a base 4, a mounting base 5, a high-speed electric spindle 6 and a matching oil-gas lubricator and a cooling device. The base 4, the mounting base 5, and the high-speed electric spindle 6 are installed on the attitude platform together with the starter 3, and move with the platform during the test. The oil-gas lubricator and the cooling device are connected to the high-speed electric spindle 6 through a hose and do not move with the platform. Compared with the general motor 3, the high-speed electric spindle 6 has the characteristics of simple structure, low power and high speed, which is very suitable for the needs of the present invention. The mounting base 5 is mainly used to ensure the coaxiality of the starter 3 and the high-speed electric spindle 6, and control the vibration level of the output shaft of the starter 3 when it rotates at high speed. The oil-gas lubricator is used to atomize the lubricating oil to provide lubrication for the bearings of the high-speed electric spindle 6. The oil mist lubrication method will not be affected by the attitude, so that the high-speed electric spindle 6 can move with the platform during the test. The cooling device provides the necessary cooling circulating water for the high-speed electric spindle 6 to ensure the temperature of the high-speed electric spindle 6 when it is working.

[0042] The schematic diagram of the lubricating oil filling system is as follows: Figure 3 As shown. The lubricating oil filling system is used to simulate the lubricating oil system on the machine, and provide the starter 3 with lubricating oil of specified flow rate and temperature. The lubricating oil filling system in the present invention has three oil circuits with the same structure, which can provide three grades of lubricating oil for the starter 3, so as to study the influence of different lubricating oils on the working performance of the starter. The three oil circuits respectively mainly include an oil tank 14, an oil supply pump 15, a flow meter 16, an oil supply filter 17, a regulating valve 18, a return oil filter 19, a return oil pump 7, and a bypass valve 8, which are finally aggregated into a pipeline heater 9, and then the pipeline heater 9 is connected to the starter 3 through a hose. The outlet of the starter 3 is connected to the radiator 10, and then connected to the return oil pump 7. The oil inlet pipeline is provided with a temperature sensor 11, a pressure sensor 12, and an oil intake port 13. During the test, the lubricating oil filling system does not move with the platform. The lubricating oil filling system controls the temperature of the lubricating oil through the pipeline heater 9, and provides the starter 3 with a specified flow of lubricating oil through the oil supply pump 15, the return oil pump 7, the regulating valve 18, and the bypass valve 8. The drive motor of the oil supply pump 15 uses a variable frequency motor, which can adjust the output displacement of the pump and cooperate with the regulating valve 18 to accurately adjust the oil supply pressure. The return oil pump 7 uses a displacement of more than twice that of the oil supply pump to ensure smooth return oil during the test of the starter 3. The filter uses a 3μm filter to ensure that the cleanliness of the lubricating oil in the oil tank is not inferior to GJB 420B 7 level. The heating method uses a pipeline heater 9 and a matching thyristor controller to adjust the lubricating oil temperature by controlling the power, and at the same time ensure that the lubricating oil is only heated before entering the starter 3, avoiding the influence of high temperature on other components in the oil circuit.

[0043] like Figure 4As shown, the posture system is mainly composed of an upper platform 20, an upper hinge 21, a cross shaft 22, a servo electric cylinder 23, a lower hinge 24, and a bracket 25. The overall structure has sufficient rigidity to ensure the smooth operation of the entire test system without generating additional vibrations. The upper platform 20 is welded from Q235 plates and profiles. After welding, it is heat treated to remove stress to ensure that the overall deformation is controllable. Finally, fine machining is performed to ensure the accuracy of the table and other matching dimensions. The table is arranged with 100×100mm M10 threaded holes for installing the output shaft overrunning rotation drive system 1 and the starter 3. The entire posture system has a load of 500kg.

[0044] When the upper platform 20 performs rolling and pitching motions, the force conditions of the servo electric cylinder 23 are the same, so it is only necessary to calculate the driving force of the servo electric cylinder 23 according to one motion. The resistance torque in the movement of the upper platform 21 mainly includes friction torque, inertia torque and eccentric torque. In order to ensure the reliable operation of the system, the maximum output torque must not be less than the sum of the friction torque, inertia torque and eccentric torque, and a certain safety margin must be reserved. The present invention comprehensively considers various factors and selects a safety margin of 1.3. The calculated thrust of the servo electric cylinder 23 is 17.5kN, the stroke is 500mm, and the maximum speed is 250mm / s.

[0045] The servo control system of the attitude system 2 is an important component of the control system of the present invention. Figure 5 As shown in the figure, the servo control system from the user end to the controlled component end is mainly composed of a user computer, an embedded controller, a signal conditioning unit, and a drive system. The user inputs control instructions to the computer, and the embedded controller completes signal acquisition and output of the control quantity. The signal is output to the drive system through the signal conditioning unit (Canopen). The drive system realizes the control of the current loop, speed loop, and position loop. Finally, the servo motor drives the electric cylinder to move and control the posture of the upper platform.

[0046] In summary, the output shaft overrunning rotation test bench of the present invention has a posture adjustment function, which can not only simulate the horizontal posture, but also simulate some working conditions inside the starter under other posture conditions, such as the relative level of lubricating oil, the forces of components such as bearings, gears, clutches, and the vibration level of the shaft system. At the same time, the heat level, sealing ability, oil supply capacity of the internal lubricating oil pump, life of various components, etc. of the starter under the working condition of output shaft overrunning rotation, the relationship between these issues and the starter posture can also be clearly verified by the output shaft overrunning rotation test bench of the present invention.

Claims

1. A starter output shaft overrunning rotation test bench with attitude function, characterized in that: Including output shaft overrunning rotation drive system, lubricating oil filling system, attitude system, measurement and control system; The output shaft exceeds the rotation drive system and is connected to the starter, driving the output shaft of the starter to rotate at high speed, the speed is adjustable, and remains stable at a specified speed; The lubricating oil filling system is connected to the starter to provide the starter with lubricating oil of specified temperature and flow rate; The starter and the output shaft overrunning rotation drive system are installed on the posture system to provide a posture condition of a specified angle for the starter; The measurement and control system is respectively connected to the output shaft overrunning rotation drive system, the lubricating oil filling system, the attitude system and the starter to control the output shaft overrunning rotation drive system, the lubricating oil filling system and the attitude system so that each system can operate reliably according to the test procedure and collect the starter test data.

2. The starter output shaft overrunning rotation test bench with attitude function according to claim 1, characterized in that: The output shaft overrunning rotation drive device is composed of a high-speed electric spindle, an oil-gas lubricator, a cooling device, and a base. A mounting base for mounting the high-speed electric spindle is provided on the base. The high-speed electric spindle is mounted on the mounting base. The output shaft of the high-speed electric spindle is connected to the output shaft of the starter through a coupling. The high-speed electric spindle provides the speed required for the test. The oil-gas lubricator is connected to the high-speed electric spindle. The oil-gas lubricator provides oil mist lubrication for the high-speed electric spindle. The cooling device is connected to the high-speed electric spindle. The cooling device controls the temperature of the high-speed electric spindle during operation by cooling water.

3. The starter output shaft overrunning rotation test bench with attitude function according to claim 2, characterized in that: A mounting stopper 1 is arranged on the base, a mounting stopper 2 is arranged on the mounting base, a starter is installed in the mounting stopper 1, a high-speed electric spindle is installed in the mounting stopper 2, and the mounting stopper 1 and the mounting stopper 2 are coaxially arranged.

4. The starter output shaft overrunning rotation test bench with attitude function according to claim 2, characterized in that: Reinforcing ribs are arranged on the sides of the base, and bolt holes for connecting with the attitude system are arranged at the bottom of the base.

5. The starter output shaft overrunning rotation test bench with attitude function according to claim 1, characterized in that: The lubricating oil filling system includes three oil circuits with the same structure, and the oil circuits include an oil tank, an oil supply pump, a flow meter, an oil supply filter, an oil return filter, an oil return pump and a bypass valve. The flow meter is connected to the oil supply filter through a regulating valve, the oil supply filter is connected to the oil supply pump, the oil supply pump is connected to the oil tank outlet through a valve, the oil tank inlet is connected to the return oil filter and the return oil pump in sequence, one end of the bypass valve is connected to the oil supply filter outlet, and the other end is connected to the oil tank; the flow meter is connected to the starter oil inlet through a pipeline heater, and the starter oil outlet is connected to the return oil pump through a radiator.

6. The starter output shaft overrunning rotation test bench with attitude function according to claim 5, characterized in that: A temperature sensor and a pressure sensor are arranged on the pipeline connecting the pipeline heater and the starter oil inlet; an oil extraction port is arranged on the pipeline connecting the pipeline heater and the starter oil inlet, an oil extraction port is arranged on the pipeline connecting the starter oil outlet and the radiator, and a temperature sensor is arranged on the pipeline connecting the starter oil outlet and the radiator.

7. The starter output shaft overrunning rotation test bench with attitude function according to claim 1, characterized in that: The attitude system includes an upper platform, an upper hinge, a cross axis, a servo electric cylinder, a lower hinge and a bracket. There are two servo electric cylinders. The bottom end of the servo electric cylinder is hinged to the lower end of the bracket through a lower hinge. The cross axis includes a roll axis and a pitch axis. Two symmetrical mounting lugs are arranged at the bottom of the upper table, and the two mounting lugs are respectively connected to the two ends of the rolling shaft, and the rolling shaft is connected to the lead screw of one of the servo electric cylinders through the upper hinge, and the lead screw of the other servo electric cylinder is connected to the bottom of the upper platform; Two symmetrical mounting lugs are arranged on the top of the bracket, the pitch axis vertically passes through the roll axis, and the two mounting lugs are respectively connected to the two ends of the pitch axis; Two sets of servo electric cylinders are used to realize the swing of the upper platform in two degrees of freedom: pitch and roll.

8. According to the starter output shaft overrunning rotation test bench with attitude function according to claim 1, it is characterized in that: The measurement and control system obtains the motion of the servo electric cylinder and generates a control instruction through real-time kinematics calculation. The control instruction is output by the embedded controller after signal conditioning to drive the servo system to achieve the desired motion posture. The measurement and control system includes a posture control module, which includes a user computer, an embedded controller, a signal conditioning unit, and a drive system that are electrically connected in sequence. The user inputs control instructions to the computer, and the embedded controller completes signal acquisition and output of control quantities. The signal is output to the drive system via the signal conditioning unit. The drive system realizes control of the current loop, speed loop and position loop inside. Finally, the servo motor drives the electric cylinder to perform displacement movement to control the posture of the upper table.

9. According to the starter output shaft overrunning rotation test bench with attitude function according to claim 8, it is characterized in that: The drive system includes a servo drive module, a servo motor, a servo electric cylinder and an angle encoder. The servo drive module receives the output signal of the signal conditioning unit, and the angle encoder collects the rotation speed of the servo motor and feeds it back to the servo drive module.

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