Linear motor thrust measuring device and method

Abstract

The invention provides a linear motor thrust measuring device and method, and the device comprises a mover rack which is used for installing a force transducer and transmitting torque, and a fixed rack of which the tail part is used for dragging a mover. The device can adapt to thrust measurement and test verification of various long-stator linear motors, and provides a test thought and verification for thrust and electromagnetic parameter design of the linear motor.

Description

Technical Field

[0001] The present invention belongs to the field of linear motors, push-pull force measurement and mechanical structure design, and specifically relates to a linear motor thrust measurement device and method, which can provide a test method and verification for the thrust and electromagnetic parameter design of the linear motor. Background Art

[0002] High-power linear motors are mainly used in the fields of electromagnetic catapults and ultra-high-speed maglev rail transportation. The push and pull forces of linear motors are mostly calculated by electromagnetic parameters. There are relatively few direct measurement tests, and there are certain deviations in simulation calculations.

[0003] Therefore, designing a structural device and method to directly measure the push-pull force performance of high-power linear motors and quickly and effectively measure the motor output has become an urgent need in the field of linear motor design and testing. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned direct measurement method of the push-pull force of the motor, the present invention provides a linear motor thrust measurement device and method, which provide experimental verification and effective reference for the electromagnetic parameter design of the linear motor.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0006] A linear motor thrust measurement device comprises a mover frame and a fixed frame; the mover frame and the fixed frame work together to measure the thrust of the linear motor; the mover frame comprises a mover frame, an interface conversion frame and a force sensor, which are fixed together by bolts to ensure structural strength; the fixed frame comprises a long screw bolt fixing structure and a fixed frame; after the linear motor is powered on and force is applied, the mover frame will move in the linear direction of the motor, and the fixed frame is fixed on a test bench to ensure a smooth movement process, and the function of measuring the thrust of the linear motor can be realized by the force sensor.

[0007] Furthermore, the mover frame of the mover stand is directly connected to the mover of the linear motor, and it is ensured that it can only move in the forward direction of the motor, and the freedom in other directions is restricted; the interface conversion frame connects and fixes the mover frame and the force sensor together, and the installation surface of the force sensor is perpendicular to the movement direction of the mover.

[0008] Furthermore, the fixing frame of the fixed stand and the force sensor are connected by a long screw bolt fixing structure, and the screw is perpendicular to the mounting surface of the force sensor; the fixing frame is fixed to the test bench by a T-bolt or a pressure plate structure; the fixing frame is designed with a through-wall mounting hole to cooperate with the long screw bolt fixing structure for fixing.

[0009] The present invention also provides a method for measuring the thrust of a linear motor, which specifically comprises the following steps:

[0010] The first step is to install the mover frame in the linear motor, adjust the air gap between the mover and the motor stator and fix it;

[0011] Step 2: Fix the interface conversion frame and the force sensor on the mover frame by bolt connection;

[0012] Step 3: Tighten the long screw in the long screw bolt fixing structure onto the force sensor, and move the fixing frame into the long screw bolt fixing structure along the thrust direction of the linear motor by hoisting;

[0013] Step 4: Then fix the fixing frame on the test platform by fixing the pressure plate bolt group structure;

[0014] Step 5. Power on the linear motor to apply the designed thrust, and read the thrust measurement value of the linear motor through the display led out from the force sensor.

[0015] Beneficial effects:

[0016] The present invention can adapt to different types of linear motor push and pull force measurements, provide a linear motor output test, test bench design method; and provide a verification method for the thrust and electromagnetic parameter design of the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a linear motor thrust measurement device of the present invention;

[0018] Figure 2 and Figure 3 It is a structural diagram of the components of the linear motor thrust measurement device of the present invention.

[0019] Among them, 1-mover frame, 2-fixed frame, 3-mover frame, 4-interface conversion frame, 5-force sensor, 6-fixed frame, 7-long screw bolt fixing structure, 8-fixed pressure plate bolt group structure, 9-test platform. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figure 1-Figure 3 As shown, a linear motor thrust measuring device of the present invention comprises a moving stand 1 and a fixed stand 2; the moving stand 1 and the fixed stand 2 work together to measure the thrust of the linear motor;

[0022] The mover stand 1 includes a mover frame 3, an interface conversion frame 4 and a force sensor 5, which are fixed together by bolts to ensure structural strength; the interface conversion frame 4 is arranged on the mover frame 3, and the force sensor 5 is arranged below the interface conversion frame 4 and connected to the fixed frame 6. The fixed stand 2 includes a fixed frame 6, a long screw bolt fixing structure 7, a fixed pressure plate bolt group structure 8 and a test platform 9; after the linear motor is powered on and forced, the mover stand 1 will move in the linear direction of the motor, and the fixed stand 2 is in a fixed state to ensure a smooth movement process, and the force sensor 5 can be used to realize the function of measuring the thrust of the linear motor.

[0023] The mover frame 3 of the mover stand 1 is directly connected to the linear motor mover, and is ensured to be able to move only in the forward direction of the motor, with freedom in other directions restricted; the interface conversion frame 4 connects and fixes the mover frame 3 and the force sensor 5 together, and the mounting surface of the force sensor 5 is perpendicular to the mover direction.

[0024] The fixing frame 6 of the fixing stand 2 and the force sensor 5 are connected via a long screw bolt fixing structure 7, and the screw is perpendicular to the mounting surface of the force sensor 5; the fixing frame 6 is fixed on the test platform 9 via a fixed pressure plate bolt group structure 8; the fixing frame 6 is designed with a through-wall mounting hole to cooperate with the long screw bolt fixing structure 7 for fixing.

[0025] The present invention also provides a linear motor thrust measurement method, which specifically comprises the following steps:

[0026] The first step is to install the mover frame 3 in the linear motor, adjust the air gap between the mover and the motor stator and fix it;

[0027] Step 2: Fix the interface conversion frame 4 and the force sensor 5 on the mover frame 3 by bolt connection;

[0028] Step 3: Tighten the long screw in the long screw bolt fixing structure 7 onto the force sensor 5, and move the fixing frame 6 into the long screw bolt fixing structure 7 along the thrust direction of the linear motor by hoisting;

[0029] Step 4: Then fix the fixing frame 6 on the test platform 9 by fixing the pressure plate bolt group structure 8;

[0030] Step 5: Power on the linear motor to apply the designed thrust, and read the thrust measurement value of the linear motor through the display led out from the force sensor 5.

[0031] Based on the above operation steps, the thrust measurement of the linear motor can be realized.

[0032] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A linear motor thrust measurement device, characterized in that: The invention comprises a moving stand (1) and a fixed stand (2); the moving stand (1) and the fixed stand (2) work together to measure the thrust of the linear motor; the moving stand (1) comprises a moving stand (3), an interface conversion stand (4) and a force sensor (5), which are fixedly connected together by bolts to ensure structural strength; the fixed stand (2) comprises a fixed stand (6); the interface conversion stand (4) is arranged on the moving stand (3), the force sensor (5) is arranged below the interface conversion stand (4) and is connected to the fixed stand (6) by a long screw bolt fixing structure (7); after the linear motor is powered on and force is applied, the moving stand (1) moves in the linear direction of the motor, the fixed stand (2) is fixed on the test bench to ensure a smooth movement process, and the thrust of the linear motor is measured by the force sensor (5).

2. A linear motor thrust measurement device according to claim 1, characterized in that: The mover frame (3) of the mover stand (1) is directly connected to the linear motor mover, and ensures that it can only move in the forward direction of the motor, while the freedom in other directions is restricted.

3. A linear motor thrust measurement device according to claim 1, characterized in that: The interface conversion frame (4) connects and fixes the mover frame (3) and the force sensor (5) together.

4. A linear motor thrust measurement device according to claim 3, characterized in that: The mounting surface of the force sensor (5) is perpendicular to the moving direction of the mover.

5. A linear motor thrust measurement device according to claim 1, characterized in that: The fixed stand (2) also includes a fixed pressure plate bolt group structure (8) and a test platform (9).

6. A linear motor thrust measurement device according to claim 5, characterized in that: The screw of the long screw bolt fixing structure (7) is perpendicular to the mounting surface of the force sensor (5).

7. A linear motor thrust measurement device according to claim 4, characterized in that: The fixing frame (6) is fixed on the test platform (9) via a fixing pressure plate bolt group structure (8).

8. A linear motor thrust measurement device according to claim 4, characterized in that: The fixing frame (6) is provided with a through-wall mounting hole for cooperating with the long screw bolt fixing structure (7) for fixing.

9. A linear motor thrust measurement device according to claim 1, characterized in that: The fixing frame (6) is designed with a through-wall mounting hole and is fixed in cooperation with a long screw bolt fixing structure (7).

10. A method for measuring a linear motor thrust measurement device according to any one of claims 1 to 9, characterized in that: The steps include: The first step is to install the mover frame (3) in the linear motor, adjust the air gap between the mover and the motor stator, and fix it; Step 2: Fix the interface conversion frame (4) and the force sensor (5) on the mover frame (3) by bolt connection; Step 3: Tighten the long screw in the long screw bolt fixing structure (7) onto the force sensor (5), and move the fixing frame (6) along the thrust direction of the linear motor into the long screw bolt fixing structure (7) by hoisting; Step 4: Then, the fixing frame (6) is fixed on the test platform (9) by fixing the pressure plate bolt group structure (8); Step 5: Power on the linear motor to apply the designed thrust, and read the thrust measurement value of the linear motor through the display led out from the force sensor (5).

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