Thrust loading device for thrust calibration of turbojet engine test bench

Abstract

The utility model discloses a thrust loading device for thrust calibration of a turbojet engine test bench, which belongs to the technical field of aero-engine testing and comprises a loading mechanism, a plugging cover and a control system. Wherein the loading mechanism is used for transmitting and adjusting thrust; the plugging cover is connected with the tail end of the loading mechanism through a bolt; the control system comprises a motor, a driver and a controller; wherein a base of the motor is connected with the outer side of the plugging cover through a bolt, and a lead screw in the motor is in threaded connection with a threaded through hole formed in the center of the plugging cover; the controller is electrically connected with the driver and is used for generating a pulse signal; the driver is electrically connected with the motor through a cable, and is used for receiving the pulse signal generated by the controller and driving the motor to operate; the design can solve the problems that in the prior art, a system is complex to install and debug, hydraulic oil may leak, pressure fluctuation and reduction are caused, and stability is poor.

Description

Technical Field

[0001] This utility model belongs to the field of aero-engine testing technology, and in particular relates to a thrust loading device for thrust calibration of a turbojet engine test bench. Background Technology

[0002] In the research and development and production of turbojet engines, the test bench is an important piece of equipment for testing and evaluating engine performance, and the thrust measurement system is a key component of the test bench. As thrust is one of the key performance indicators of turbojet engines, the accuracy and stability of its measurement are of paramount importance. In order to ensure the accuracy of the thrust measurement system on the test bench, it is necessary to calibrate it regularly.

[0003] However, thrust calibration requires thrust loading, and existing thrust loading devices have some shortcomings, such as:

[0004] 1. Complex installation and commissioning: Existing hydraulic systems require hydraulic oil sources, complex pipelines, and high-precision control valves, which makes installation and commissioning complex and thus increases the cost of the equipment.

[0005] Second, insufficient stability; the hydraulic oil in the existing hydraulic system may leak, causing pressure fluctuations and drops, making its stability insufficient and requiring regular maintenance and inspection; in addition, the traditional device uses a lever loading method, which is affected by mechanical structure, such as mechanical deformation, fulcrum friction and other factors, which will further reduce the accuracy and stability of the device.

[0006] Third, the existing equipment has poor flexibility and insufficient versatility when adapting to different types of turbojet engines.

[0007] To address the shortcomings of existing technologies, this utility model provides a thrust loading device for thrust calibration on a turbojet engine test bench, aiming to solve the aforementioned problems. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a thrust loading device for thrust calibration on a turbojet engine test bench. This device can solve the problems of complex system installation and debugging, possible hydraulic oil leakage, pressure fluctuation and drop, and poor stability in the prior art.

[0009] To achieve the above objectives, this utility model employs the following technical solution:

[0010] A thrust loading device for thrust calibration on a turbojet engine test bench, comprising:

[0011] A loading mechanism, which is used to transmit and adjust thrust;

[0012] A sealing cap, which is connected to the end of the loading mechanism by bolts;

[0013] and a control system, wherein the control system includes a motor, a driver, and a controller; wherein,

[0014] The base of the motor is connected to the outside of the sealing cover by bolts, and the lead screw inside the motor is threadedly connected to the threaded through hole in the center of the sealing cover.

[0015] The controller is electrically connected to the driver and is used to generate pulse signals;

[0016] The driver is electrically connected to the motor via a cable, and is used to receive pulse signals generated by the controller and drive the motor to run.

[0017] Preferably, the loading mechanism includes a housing, a push rod, a spring, and a flat thrust ball bearing; wherein,

[0018] The rear end of the outer casing is provided with a mounting base, and the sealing cover is fixed to the mounting base by bolts;

[0019] The top rod is located inside the outer shell, and one end of it is movably connected to a circular hole opened at the head of the outer shell, while the other end of the top rod is connected to a disc.

[0020] The spring is located inside the outer casing, with one end of the spring connected to the other end of the disk and the other end of the spring connected to the planar thrust ball bearing, which is located inside the sealing cover.

[0021] Preferably, the other end of the lead screw inside the motor is connected to the planar thrust ball bearing.

[0022] Preferably, it also includes a power source that provides power to the control system.

[0023] Preferably, the motor is a through-type linear lead screw stepper motor.

[0024] Preferably, the spring is made of an alloy material.

[0025] Preferably, the loading mechanism is further provided with several bolt holes for fixed connection with an external engine test bench.

[0026] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0027] 1. This utility model uses a through-type linear screw stepper motor as the power source for thrust loading, which solves the problems of complex installation and debugging of hydraulic systems, possible leakage of hydraulic oil, pressure fluctuation and drop, and poor stability in hydraulic loading. At the same time, it overcomes the problems of poor accuracy and stability caused by the influence of mechanical structure, such as mechanical deformation and fulcrum friction, in lever loading.

[0028] 2. The loading mechanism of this utility model adopts a modular design, and the components can be detachably connected, which facilitates installation and maintenance. At the same time, it is easy to flexibly configure and upgrade according to different models of turbojet engines and test benches, thus improving the flexibility and versatility of the device. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model.

[0030] Figure 2 This is a cross-sectional view of the present invention.

[0031] Figure 3 This is a cross-sectional view of the present invention.

[0032] in:

[0033] 1. Outer shell; 101. Round hole; 2. Push rod; 201. Disc; 3. Spring; 4. Surface thrust ball bearing; 5. Sealing cap; 501. Threaded through hole; 6. Motor; 7. Lead screw; 8. Driver; 9. Power supply; 10. Controller; 11. Cable; 12. Bolt; 13. Mounting base. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0035] In the description of this utility model, it should be understood that the terms "middle," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Example 1

[0038] refer to Figures 1-3 This embodiment provides a thrust loading device for thrust calibration on a turbojet engine test bench, comprising:

[0039] A loading mechanism, which is used to transmit and adjust thrust;

[0040] A sealing cap 5 is connected to the end of the loading mechanism by bolts 12;

[0041] and a control system, the control system including a motor 6, a driver 8, and a controller 10; wherein,

[0042] The base of the motor 6 is connected to the outside of the sealing cover 5 by bolts 12, and the lead screw 7 inside the motor 6 is threadedly connected to the threaded through hole 501 opened in the center of the sealing cover 5.

[0043] The controller 10 is electrically connected to the driver 8 and is used to generate pulse signals;

[0044] The driver 8 is electrically connected to the motor 6 via cable 11, and is used to receive pulse signals generated by the controller 10 and drive the motor 6 to run.

[0045] It should be noted that, in this embodiment, the controller 10 is an intelligent motion controller.

[0046] Specifically, the loading mechanism includes a housing 1, a push rod 2, a spring 3, and a planar thrust ball bearing 4; wherein,

[0047] The rear end of the outer shell 1 is provided with a mounting base 13, and the sealing cover 5 is fixed to the mounting base 13 by bolts 12;

[0048] The push rod 2 is located inside the outer shell 1, and one end of it is movably connected to the circular hole 101 opened at the head of the outer shell 1. The other end of the push rod 2 is connected to the disk 201. The function of the push rod 2 is to transmit the thrust to the calibrated thrust sensor in the thrust measurement system outside the device.

[0049] The spring 3 is located inside the outer shell 1, and one end of the spring 3 is connected to the other end of the disk 201. The other end of the spring 3 is connected to the planar thrust ball bearing 4, and the planar thrust ball bearing 4 is located inside the sealing cover 5. It can withstand a large axial load and can move smoothly axially inside the outer shell 1.

[0050] Furthermore, the other end of the lead screw 7 inside the motor 6 is connected to the planar thrust ball bearing 4.

[0051] Furthermore, the device also includes a power supply 9, which provides power to the control system; wherein the power supply 9 is electrically connected to the controller 10 and the driver 8 respectively.

[0052] Specifically, the motor 6 is a through-type linear lead screw stepper motor. The thread of the lead screw 7 inside the motor 6 matches the threaded through hole 501 in the center of the sealing cover 5, giving it the characteristics of high position control accuracy, high rigidity and load-bearing capacity, simple drive, smooth operation and good self-locking. The length, lead, step length, working speed, torque and current of the lead screw 7 inside the motor 6 can be customized according to requirements to meet the needs of different spaces, positions and working conditions.

[0053] Specifically, the spring 3 is made of an alloy material; and it should be noted that in this embodiment, the spring 3 is made of a high-strength, high-load-bearing alloy material.

[0054] To facilitate the installation and fixation of the device, in this embodiment, the loading mechanism is also provided with several bolt holes for fixed connection with an external engine test bench. These bolt holes are used to fix the loading mechanism to the test bench frame using high-strength bolts 12. The base of the motor 6 is connected to the sealing cover 5 of the loading mechanism using high-strength bolts 12. This connection method results in a compact structure and saves space.

[0055] It should be noted that, in this embodiment, the loading mechanism of the present invention adopts a modular design, and the components are detachably connected, which facilitates installation and maintenance. At the same time, it is easy to flexibly configure and upgrade according to different models of turbojet engines and test benches, thereby improving the flexibility and versatility of the device.

[0056] It should be noted that in this embodiment, the controller 10 is an intelligent motion controller that generates pulse signals to control the operation of the motor 6, thereby controlling the speed, direction, and position of the motor 6. It is a special operation control module for stepper motors. This module does not have programming function, but it has multiple built-in fixed operating modes and can quickly select a suitable motion trajectory. The no-programming version is selected, and the operation is simple.

[0057] It should be noted that, in this embodiment, the motor 6, driver 8, power supply 9, and controller 10 in the control system can all be selected according to requirements.

[0058] Working principle: When in use, the selection of driver 8 and power supply 9 must be matched with motor 6. The operator controls the operation of motor 6 by operating controller 10, converting the rotational motion of motor 6 into the linear motion of lead screw 7. The motion of lead screw 7 pushes the planar thrust ball bearing 4 to move axially, causing the high-strength spring 3 to be compressed after being stressed, and the generated force is transmitted to push rod 2. This is the process of loading thrust.

[0059] In summary, in this embodiment, the present invention uses a through-type linear screw stepper motor as the power source for thrust loading, which solves the problems of complex installation and debugging of hydraulic systems, possible leakage of hydraulic oil, pressure fluctuations and drops, and poor stability in hydraulic loading. At the same time, it overcomes the problems of poor accuracy and stability caused by the influence of mechanical structure, such as mechanical deformation and fulcrum friction, in lever loading.

[0060] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A thrust loading device for thrust calibration on a turbojet engine test bench, characterized in that, include: A loading mechanism, which is used to transmit and adjust thrust; A sealing cap (5) is connected to the end of the loading mechanism by bolts (12); and a control system, the control system comprising a motor (6), a driver (8), and a controller (10); wherein, The base of the motor (6) is connected to the outside of the sealing cover (5) by bolts (12), and the lead screw (7) inside the motor (6) is threadedly connected to the threaded through hole (501) opened in the center of the sealing cover (5). The controller (10) is electrically connected to the driver (8) and is used to generate pulse signals; The driver (8) is electrically connected to the motor (6) via a cable (11) to receive pulse signals generated by the controller (10) and drive the motor (6) to run.

2. The thrust loading device for thrust calibration on a turbojet engine test bench according to claim 1, characterized in that, The loading mechanism includes a housing (1), a push rod (2), a spring (3), and a planar thrust ball bearing (4); wherein, The rear end of the outer shell (1) is provided with a mounting base (13), and the sealing cover (5) is fixed on the mounting base (13) by bolts (12); The top rod (2) is located inside the outer shell (1), and one end of it is movably connected to the round hole (101) opened at the head of the outer shell (1), and the other end of the top rod (2) is connected to a disc (201). The spring (3) is located inside the outer shell (1), and one end of the spring (3) is connected to the other end of the disc (201), the other end of the spring (3) is connected to the planar thrust ball bearing (4), and the planar thrust ball bearing (4) is located inside the sealing cover (5).

3. The thrust loading device for thrust calibration on a turbojet engine test bench according to claim 2, characterized in that, The other end of the lead screw (7) inside the motor (6) is connected to the planar thrust ball bearing (4).

4. The thrust loading device for thrust calibration on a turbojet engine test bench according to claim 1, characterized in that, It also includes a power supply (9) that provides power to the control system.

5. The thrust loading device for thrust calibration of a turbojet engine test bench according to claim 1, characterized in that, The motor (6) is a through-type linear lead screw stepper motor.

6. The thrust loading device for thrust calibration of a turbojet engine test bench according to claim 3, characterized in that, The spring (3) is made of alloy material.

7. The thrust loading device for thrust calibration of a turbojet engine test bench according to claim 1, characterized in that, The loading mechanism is also provided with several bolt holes for fixed connection with an external engine test bench.

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