An engine actuator test and assessment device

Abstract

The present application belongs to an engine regulating mechanism actuator test loading device, and particularly relates to an engine actuator test assessment device, comprising a fixing device having a vertical wall, the outer cylinder end of the actuator test piece being hinged on the wall, and the piston rod of the actuator test piece being hinged with a rocker arm; a resistance simulation device, comprising a column crossbeam, an actuator, a torque-adding seat, and a torque transmission shaft, one end of the torque transmission shaft being mounted on the torque-adding seat via a bearing, and the other end passing through the vertical wall and being hinged to the rocker arm, the side wall of the torque transmission shaft being hinged to the output shaft of the actuator via a radially extending support arm, and the outer cylinder of the actuator being hinged to the column crossbeam; a lateral force loading device, comprising a connecting piece connected to one end of the outer cylinder of the actuator test piece close to the piston rod, and a driving device connected to the connecting piece and providing a lateral force perpendicular to the axial direction of the piston rod, which can effectively assess the reliability and durability of the actuator.

Description

Technical Field

[0001] The present application relates to an engine regulating mechanism actuator test loading device, and in particular to an engine actuator test assessment device. Background Art

[0002] The actuator of the engine regulating mechanism is an important part of the regulating mechanism. It provides the power source for the regulating mechanism to adjust the position of the blades. Its reliability is related to whether the engine performance adjustment function can be realized in time. Its failure will affect a series of engine functions, causing serious wear or oil leakage at the least, and serious accidents such as engine shutdown at the worst. Therefore, the assessment test and verification of the actuator is an indispensable process in the engine development process. At present, the general assessment methods for the actuator of the regulating mechanism include pressure test, pressure pulsation test, durability test, etc. There is usually no special test device specifically for the operating conditions of the actuator, and it is impossible to assess the impact of lateral loads and other factors that occur during the operation of the actuator. Therefore, the assessment of the actuator is incomplete, and the actual working conditions of the actuator are not fully assessed. The assessment test of the actuator can check its sealing condition, operating function and other performance parameters. However, in actual use, there may be complex installation structures and complex stress conditions. For example, in addition to the stress form of the two-force rod structure of the front and rear hinged connection of the actuator, due to the existence of friction at the hinged position, a large lateral load will be generated during the movement. The existence of the lateral load makes the piston and seal inside the actuator unevenly stressed, the lateral pressure of the sealant increases, the loss of the seal or a large amount of local wear on the actuator wall, resulting in the risk of the actuator getting stuck. The existing actuator assessment method can no longer meet the assessment requirements of specific working environment conditions. Summary of the invention

[0003] In order to solve the above problems, the present application provides an engine actuator test and assessment device, comprising:

[0004] A fixing device having a vertical wall, the end of the outer cylinder of the actuator test piece is hinged on the wall, and the piston rod of the actuator test piece is hinged with a rocker arm;

[0005] The resistance simulation device comprises a column cross beam, an actuator, a torque-adding seat, and a torque transmission shaft, one end of which is mounted on the torque-adding seat through a bearing, and the other end of which passes through the vertical wall and is hinged to the rocker arm, the side wall of which is hinged to the output shaft of the actuator through a radially extending support arm, and the outer cylinder of the actuator is hinged to the column cross beam;

[0006] The lateral force loading device comprises a connecting piece connected to an end of an outer cylinder of an actuator test piece close to a piston rod, and a driving device connected to the connecting piece and providing a force perpendicular to the axis direction of the piston rod.

[0007] The above technical features provide a resistance simulation device and a lateral force loading device for the two forces of the actuator test piece, thereby solving the problem that there is no lateral force loading during the traditional actuator test piece experiment.

[0008] Preferably, the actuator test piece is installed with a displacement sensor and a force sensor, which are respectively connected to an electro-hydraulic servo controller. The electro-hydraulic servo controller controls the flow rate of the high-pressure oil source entering the actuator test piece by controlling the first electro-hydraulic servo valve, thereby controlling the actuation of the actuator test piece. The above technical features provide a closed-loop control system that can effectively control the actuation of the actuator test piece through the displacement sensor and the force sensor.

[0009] Preferably, the electro-hydraulic servo controller is also connected to a second electro-hydraulic servo valve, which controls the actuation of the actuator, connects the actuator to the second electro-hydraulic servo valve 17, and the actuator serves as the actuator of the second electro-hydraulic servo system. The axial force is used as a feedback form to form a closed-loop force control system, which is tested synchronously with the displacement control method of the actuator test piece to ensure that the axial force of the actuator is always opposite to the movement direction of the actuator test piece.

[0010] Preferably, the actuator is a double-rod actuator, which has two pressure chambers, which are connected by a throttle valve. This device constitutes a throttling resistance simulation. The test devices are all placed on the basic platform. The actuator can apply resistance to the torque transmission shaft. When the throttle valve knob is turned down to control the flow in and out, the actuator test piece controlled by the electro-hydraulic servo controller moves according to the displacement load spectrum, and transmits the torque to the actuator test piece through the torque transmission shaft. Since the two pressure chambers of the double-rod actuator are connected by the throttle valve, when the throttle valve flow rate is turned down, it will generate hydraulic resistance, which is balanced with the axial force of the piston rod of the actuator test piece. When the piston rod of the actuator reverses from extension to retraction, the piston rod of the double-rod actuator also reverses, and the hydraulic oil in its two pressure chambers flows in the opposite direction, still generating resistance to the piston rod of the actuator test piece. Thus, the resistance of the structure driven by the actuator test piece is simulated, and the throttle valve can adjust the size of the resistance. In the above manner, an adjustable resistance, ie, the axial force on the piston rod of the actuator, is achieved.

[0011] Preferably, the driving device is a weight loading assembly, including a fixed pulley, a rope, and a weight, wherein the fixed pulley and the connecting member are located in the same horizontal plane, one end of the rope is connected to the connecting member, and a weight is hung on the other end to provide tension, and the middle part of the rope rests on the fixed pulley.

[0012] Preferably, the outer cylinder end of the actuator test piece is hinged to the wall surface, and the specific hinge method is: the outer cylinder end has a single-ear structure, the wall surface has a double-ear structure, and the single-ear structure and the double-ear structure are hinged via a pin.

[0013] Preferably, the axis of the pin is parallel to the wall surface, the single-ear structure and the double-ear structure are clearance fit, and the pin is clearance fit with the single-ear structure and the double-ear structure respectively, so that the actuator test piece can swing along the direction of the lateral force. The connection method of the actuator test piece of this structure is the same as the actual working environment. The fixing device is a working condition simulation adapter structure, which is exactly the same as the actual working condition. The actuator test piece is installed on the working condition simulation adapter structure, and its connection form is the same or similar to that of the engine to simulate the stress conditions of the actuator test piece during operation, such as the tailstock installation connection, piston rod connection method and movement method of the actuator test piece are the same or similar to the actual structure.

[0014] Preferably, the force sensor is a bonded strain gauge. Since the piston rod is always under stress during movement, in order to effectively monitor the stress state, the piston rod is modified and an axial force test bridge is arranged by bonding a strain gauge. The axial force is calibrated into the controller by load calibration before the test. This not only monitors the axial force, but also allows the axial force to be used as a feedback input parameter for test control, as the resistance simulated by this patent.

[0015] Preferably, the electro-hydraulic servo controller is programmed with a displacement load spectrum, and the electro-hydraulic servo controller controls the actuation of the actuator cylinder test piece through the displacement load spectrum.

[0016] Preferably, the driving device includes a lateral force actuator and a lateral force electro-hydraulic servo controller for controlling the lateral force actuator. The lateral force can be loaded synchronously with the motion and resistance to meet more refined test lateral force loading requirements.

[0017] In summary, the advantages of this application include:

[0018] 1. Realize effective test assessment and verification of the actual actuator working conditions;

[0019] 2. Simulate the actual working conditions of the actuator to achieve simulation of the near-real working environment conditions;

[0020] 3. Effectively evaluate the reliability and durability of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a front view of the engine actuator test and assessment device of the first embodiment;

[0022] Figure 2 It is a side view of the engine actuator test and assessment device of the first embodiment;

[0023] Figure 3 This is a view of the engine actuator test and assessment device of Example 2.

[0024] 1-column crossbeam; 2-actuator; 3-simulation adapter structure; 4-torque seat; 5-fixed cylinder; 6-basic platform; 7-throttle valve; 8-torque transmission shaft; 9-actuator test piece; 10-force sensor feedback signal; 11-displacement sensor feedback signal; 12-electro-hydraulic servo controller; 13-high-pressure oil source; 14-servo valve command signal; 15-high-pressure oil pipe; 16-first electro-hydraulic servo valve; 17-second electro-hydraulic servo valve, 18-rocker arm. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0026] Embodiment 1: Figure 1 As shown, the engine actuator test and assessment device comprises:

[0027] A fixing device having a vertical wall, to which the end of the outer cylinder of the actuator test piece 9 is hinged, and to which the piston rod of the actuator test piece is hingedly connected a rocker arm 18;

[0028] The resistance simulation device comprises a column cross beam 1, an actuator 2, a torque-adding seat 4, and a torque transmission shaft 8. One end of the torque transmission shaft 8 is mounted on the torque-adding seat 4 through a bearing, and the other end passes through the vertical wall and is hinged to the rocker arm 18. The side wall of the torque transmission shaft 8 is hinged to the output shaft of the actuator 2 through a radially extending support arm, and the outer cylinder of the actuator 2 is hinged to the column cross beam 1.

[0029] The lateral force loading device comprises a connecting piece connected to the outer tube of the actuator test piece near one end of the piston rod, and a driving device connected to the connecting piece and providing a force perpendicular to the axis direction of the piston rod, wherein the actuator test piece 9 is installed with a displacement sensor and a force sensor, and the displacement sensor and the force sensor are respectively connected to an electro-hydraulic servo controller 12, and the electro-hydraulic servo controller 12 controls the flow of the high-pressure oil source 13 entering the actuator test piece 9 by controlling the first electro-hydraulic servo valve 16, thereby controlling the actuation of the actuator test piece 9. The above technical features provide a closed-loop control system, which can effectively control the actuation of the actuator test piece 9 through the displacement sensor and the force sensor;

[0030] The electro-hydraulic servo controller 12 is programmed with a displacement load spectrum, and the electro-hydraulic servo controller 12 controls the actuation of the actuator test piece 9 through the displacement load spectrum;

[0031] Among them, the outer cylinder end of the actuator test piece 9 is hinged to the wall surface, and the specific hinge method is: the outer cylinder end has a single-ear structure, and the wall surface has a double-ear structure. The single-ear structure and the double-ear structure are hinged through a pin shaft, and the axis of the pin shaft is parallel to the wall surface. The single-ear structure and the double-ear structure are clearance-matched, and the pin shaft and the single-ear structure and the double-ear structure are clearance-matched respectively, which can make the actuator test piece 9 shake along the lateral force direction. The connection method of the actuator test piece of this structure is the same as the actual working environment. The fixing device is a working condition simulation transition structure, which is exactly the same as the actual working condition. The actuator test piece is installed on the working condition simulation transition structure, and its connection form is the same or similar to that of the engine to simulate the stress condition of the actuator test piece during operation, such as the tailstock installation connection, piston rod connection method and movement method of the actuator test piece are the same or similar to the actual structure;

[0032] The electro-hydraulic servo controller 12 is also connected to a second electro-hydraulic servo valve 17, which controls the actuation of the actuator 2. The actuator is connected to the second electro-hydraulic servo valve 17, and the actuator serves as an actuator of the second electro-hydraulic servo system. The axial force resistance is used as a feedback form to form a closed-loop force control system. The test is carried out synchronously with the displacement control method of the actuator test piece to ensure that the axial force of the actuator is always opposite to the movement direction of the actuator test piece.

[0033] Embodiment 2: An engine actuator test and assessment device, comprising:

[0034] A fixing device having a vertical wall, to which the end of the outer cylinder of the actuator test piece 9 is hinged, and to which the piston rod of the actuator test piece is hingedly connected a rocker arm 18;

[0035] The resistance simulation device comprises a column cross beam 1, an actuator 2, a torque-adding seat 4, and a torque transmission shaft 8. One end of the torque transmission shaft 8 is mounted on the torque-adding seat 4 through a bearing, and the other end passes through the vertical wall and is hinged to the rocker arm 18. The side wall of the torque transmission shaft 8 is hinged to the output shaft of the actuator 2 through a radially extending support arm, and the outer cylinder of the actuator 2 is hinged to the column cross beam 1.

[0036] The lateral force loading device comprises a connecting piece connected to the outer tube of the actuator test piece near one end of the piston rod, and a driving device connected to the connecting piece and providing a force perpendicular to the axis direction of the piston rod, wherein the actuator test piece 9 is installed with a displacement sensor and a force sensor, and the displacement sensor and the force sensor are respectively connected to an electro-hydraulic servo controller 12, and the electro-hydraulic servo controller 12 controls the flow of the high-pressure oil source 13 entering the actuator test piece 9 by controlling the first electro-hydraulic servo valve 16, thereby controlling the actuation of the actuator test piece 9. The above technical features provide a closed-loop control system, which can effectively control the actuation of the actuator test piece 9 through the displacement sensor and the force sensor;

[0037] The electro-hydraulic servo controller 12 is programmed with a displacement load spectrum, and the electro-hydraulic servo controller 12 controls the actuation of the actuator test piece 9 through the displacement load spectrum;

[0038] Among them, the outer cylinder end of the actuator test piece 9 is hinged to the wall surface, and the specific hinge method is: the outer cylinder end has a single-ear structure, and the wall surface has a double-ear structure. The single-ear structure and the double-ear structure are hinged through a pin shaft, and the axis of the pin shaft is parallel to the wall surface. The single-ear structure and the double-ear structure are clearance-matched, and the pin shaft and the single-ear structure and the double-ear structure are clearance-matched respectively, which can make the actuator test piece 9 shake along the lateral force direction. The connection method of the actuator test piece of this structure is the same as the actual working environment. The fixing device is a working condition simulation transition structure, which is exactly the same as the actual working condition. The actuator test piece is installed on the working condition simulation transition structure, and its connection form is the same or similar to that of the engine to simulate the stress condition of the actuator test piece during operation, such as the tailstock installation connection, piston rod connection method and movement method of the actuator test piece are the same or similar to the actual structure;

[0039] Different from the first embodiment, the electro-hydraulic servo controller 12 is also connected to a second electro-hydraulic servo valve 17, which controls the actuation of the actuator 2. The actuator is connected to the second electro-hydraulic servo valve 17. The actuator serves as the actuator of the second electro-hydraulic servo system, and the axial force resistance serves as a feedback form to form a closed-loop force control system. The test is carried out synchronously with the displacement control method of the actuator test piece to ensure that the axial force of the actuator is always opposite to the movement direction of the actuator test piece. The actuator 2 is a double-rod actuator, and the double-rod actuator has two pressure chambers. The two pressure chambers are connected through a throttle valve. This device constitutes a throttling resistance simulation. The test devices are all placed on the basic platform. The actuator can apply resistance to the torque transmission shaft. When the throttle valve knob is turned down to control the flow in and out, the actuator test piece controlled by the electro-hydraulic servo controller moves according to the displacement load spectrum, and the torque is transmitted to the actuator test piece through the torque transmission shaft. Since the two pressure chambers of the double-rod actuator are connected through the throttle valve, when the throttle valve flow rate is reduced, it will generate hydraulic resistance, which is balanced with the axial force of the piston rod of the actuator test piece. When the actuator piston rod reverses from extension to retraction, the piston rod of the double-rod actuator also reverses, and the hydraulic oil in its two pressure chambers flows in the opposite direction, still generating resistance to the piston rod of the actuator test piece. This simulates the resistance of the structure driven by the actuator test piece, and the throttle valve can adjust the size of the resistance. In the above manner, adjustable resistance, that is, the axial force on the piston rod of the actuator, is achieved.

[0040] The above-mentioned technical features provide a resistance simulation device and a lateral force loading device for two forces of the actuator test piece 9, which solves the disadvantage that the traditional actuator test piece 9 has no lateral force loading during the experiment, and realizes the effective test assessment and verification of the real actuator working condition; simulates the actual use condition of the actuator, and realizes the simulation of the near-real working environment condition; effectively assesses the reliability and durability of the actuator.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An engine cylinder test and assessment device, characterized in that: include: A fixing device having a vertical wall surface, the outer cylinder end of the actuator cylinder test piece (9) is hinged on the wall surface, and the piston rod of the actuator cylinder test piece (9) is hinged with a rocker arm (18); The resistance simulation device comprises a column cross beam (1), an actuator (2), a torque-adding seat (4), and a torque transmission shaft (8). One end of the torque transmission shaft (8) is mounted on the torque-adding seat (4) via a bearing, and the other end passes through the vertical wall surface and is hinged to a rocker arm (18). The side wall of the torque transmission shaft (8) is hinged to an output shaft of the actuator (2) via a radially extending support arm, and the outer cylinder of the actuator (2) is hinged to the column cross beam (1). The lateral force loading device comprises a connecting piece connected to an end of an outer cylinder of an actuator test piece close to a piston rod, and a driving device connected to the connecting piece and providing a lateral force perpendicular to the axial direction of the piston rod.

2. The engine cylinder test and assessment device according to claim 1, characterized in that: in, The actuator test piece (9) is equipped with a displacement sensor and a force sensor, which are respectively connected to an electro-hydraulic servo controller (12). The electro-hydraulic servo controller (12) controls the flow rate of the high-pressure oil source (13) entering the actuator test piece (9) by controlling a first electro-hydraulic servo valve (16), thereby controlling the actuation of the actuator test piece (9).

3. The engine cylinder test and assessment device according to claim 2, characterized in that: The electro-hydraulic servo controller (12) is also connected to a second electro-hydraulic servo valve (17), and the second electro-hydraulic servo valve (17) controls the actuation of the actuator cylinder (2).

4. The engine cylinder test and assessment device according to claim 1, characterized in that: The actuator cylinder (2) is a double-rod actuator having two pressure chambers, and the two pressure chambers are connected through a throttle valve.

5. The engine cylinder test and assessment device according to claim 1, characterized in that: The driving device is a weight loading assembly, including a fixed pulley, a rope, and a weight. The fixed pulley and the connecting member are located in the same horizontal plane. One end of the rope is connected to the connecting member, and the other end hangs a weight to provide tension. The middle part of the rope rests on the fixed pulley.

6. The engine cylinder test and assessment device according to claim 1, characterized in that: The outer cylinder end of the actuator cylinder test piece (9) is hinged to the wall surface, and the specific hinge method is: the outer cylinder end has a single ear structure, the wall surface has a double ear structure, and the single ear structure and the double ear structure are hinged through a pin shaft.

7. The engine cylinder test and assessment device according to claim 6, characterized in that: The axis of the pin is parallel to the wall surface, the single ear structure and the double ear structure are clearance matched, and the pin is clearance matched with the single ear structure and the double ear structure respectively, so that the actuator test piece (9) can shake along the lateral force direction.

8. The engine cylinder test and assessment device according to claim 2, characterized in that: The force sensor is a bonded strain gauge.

9. The engine cylinder test and assessment device according to claim 1, characterized in that: The electro-hydraulic servo controller (12) is provided with a displacement load spectrum, and the electro-hydraulic servo controller (12) controls the actuation of the actuator cylinder test piece (9) through the displacement load spectrum.

10. The engine cylinder test and assessment device according to claim 1, characterized in that: The driving device includes a lateral force actuator and a lateral force electro-hydraulic servo controller for controlling the lateral force actuator.

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