阅读说明：本技术 一种测量大尺寸大重量组件受力或力矩的装置和方法 (Device and method for measuring stress or moment of large-size heavy component ) 是由 汪彤 张胜 王刚 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种测量大尺寸大重量组件受力或力矩的装置和方法,包括测功电机,测功电机具有筒状外壳,筒状外壳下部经摆动轴承连接固定基座,摆动轴承相对两侧分设有用于支撑外壳壳体的第一和第二浮动底座,第一和第二浮动底座与筒状外壳壳体相接处分别设有由第一和第二静压轴承油提供的油膜；沿径向,筒状外壳壳体上连接向外伸展的臂部,经筒状外壳壳体转动时的带动,臂部形成扭臂,扭臂转动位的前方位设有可读取和记录其扭力和扭矩的记录仪；测功电机具有转子,与转子同轴的浮动定子上装有励磁绕组；还包括可与电机主轴同轴转动的辊筒,辊筒的部分辊面形成待测试机动车驱动轮的摩擦作用面。(The invention discloses a device and a method for measuring stress or moment of a large-size heavy component, wherein the device comprises a dynamometer motor, the dynamometer motor is provided with a cylindrical shell, the lower part of the cylindrical shell is connected with a fixed base through a swing bearing, the two opposite sides of the swing bearing are respectively provided with a first floating base and a second floating base which are used for supporting a shell body, and oil films provided by first hydrostatic bearing oil and second hydrostatic bearing oil are respectively arranged at the joints of the first floating base and the second floating base and the cylindrical shell body; the cylindrical shell is connected with an arm part which extends outwards along the radial direction, the arm part forms a torque arm driven by the cylindrical shell when rotating, and a recorder capable of reading and recording the torque force and the torque force is arranged in front of the rotation position of the torque arm; the dynamometer motor is provided with a rotor, and a floating stator coaxial with the rotor is provided with an excitation winding; the device also comprises a roller which can rotate coaxially with the main shaft of the motor, and part of the roller surface of the roller forms a friction acting surface of the driving wheel of the motor vehicle to be tested.)

1. A device for measuring the force or moment applied to a large-size and heavy-weight component, comprising:

the dynamometer motor is provided with a cylindrical shell, the middle position of the lower part of the cylindrical shell is connected with a fixed base through a swing bearing, the opposite two sides of the swing bearing are respectively provided with a first floating base and a second floating base which are used for supporting the cylindrical shell, an oil film provided by first hydrostatic bearing oil is arranged at the joint of the first floating base and the cylindrical shell, and an oil film provided by second hydrostatic bearing oil is arranged at the joint of the second floating base and the cylindrical shell;

the cylindrical shell is connected with a cylindrical shell body, the cylindrical shell body is connected with an arm part extending outwards, the arm part is driven by the cylindrical shell body when rotating, a torque arm is formed on the arm part, and a recorder capable of reading and recording the torque force and/or the torque force is arranged in front of the rotation position of the torque arm;

the dynamometer motor is provided with a rotor, and a floating stator coaxial with the rotor is provided with an excitation winding;

the testing device also comprises a roller which can rotate coaxially with the main shaft of the motor, and part of the roller surface of the roller forms a friction acting surface of the driving wheel of the motor vehicle to be tested.

2. The device for measuring force or moment of a large-size heavy component according to claim 1, wherein the oscillating bearing is a vertical knuckle bearing.

3. The apparatus for measuring the force or moment applied to the large-sized heavy component according to claim 1, wherein the first floating base has a first rolling support adjusting mechanism for adjusting the floating of the roller.

4. The device for measuring the stress or moment of a large-size and heavy-weight component as claimed in claim 1, wherein the second floating base is provided with a second rolling support adjusting mechanism for adjusting the balance of the two floating sides of the roller.

5. A device for measuring forces or moments on a large scale high weight assembly according to claim 1 wherein the arm extends outwardly in a horizontal direction and the recorder is a load cell positioned below the arm.

6. The device for measuring the stress or the moment of a large-size and heavy-weight component according to claim 1, wherein the device comprises more than one roller which are arranged side by side, and the roller surfaces of the more than one roller form friction acting surfaces of different driving wheels of a motor vehicle to be tested respectively.

7. A method for measuring forces or moments on components with large dimensions and large weights, characterized in that a device according to any of claims 1-6 is used.

Technical Field

The invention relates to a whole vehicle dynamometer in the field of large-scale precision machine tool equipment, in particular to a device and a method for measuring stress or moment of a large-size heavy component.

Background

For large-size and heavy-weight components, due to the characteristics of large size and heavy weight, when the stress or torque is measured by adopting conventional means such as a gravity torque sensor in the prior art, the mechanical structure is complex, the length of a shaft system is increased, the occupied space of equipment is large, and the difficulty in operation is large.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a device capable of quickly and accurately measuring the stress or moment of a large-size heavy component.

The technical problem to be solved can be implemented by the following technical scheme.

A device for measuring forces or moments on a large-size, heavy-weight component, comprising:

the dynamometer motor is provided with a cylindrical shell, the middle position of the lower part of the cylindrical shell is connected with a fixed base through a swing bearing, the opposite two sides of the swing bearing are respectively provided with a first floating base and a second floating base which are used for supporting the cylindrical shell, an oil film provided by first hydrostatic bearing oil is arranged at the joint of the first floating base and the cylindrical shell, and an oil film provided by second hydrostatic bearing oil is arranged at the joint of the second floating base and the cylindrical shell;

the cylindrical shell is connected with a cylindrical shell body, the cylindrical shell body is connected with an arm part extending outwards, the arm part is driven by the cylindrical shell body when rotating, a torque arm is formed on the arm part, and a recorder capable of reading and recording the torque force and/or the torque force is arranged in front of the rotation position of the torque arm;

the dynamometer motor is provided with a rotor, and a floating stator coaxial with the rotor is provided with an excitation winding;

the testing device also comprises a roller which can rotate coaxially with the main shaft of the motor, and part of the roller surface of the roller forms a friction acting surface of the driving wheel of the motor vehicle to be tested.

As a further improvement of the technical scheme, the swinging bearing is a vertical joint bearing.

As a further improvement of the technical scheme, the first floating base is provided with a first rolling support adjusting mechanism for adjusting the floating range of the roller.

As a further improvement of the technical scheme, the second floating base is provided with a second rolling support adjusting mechanism for adjusting the floating balance of the roller.

In a preferred embodiment of the invention, the arm extends horizontally outwardly, and the recorder is a load cell positioned below the arm.

Also as a further improvement of the technical scheme, the device comprises more than one roller which is arranged side by side, and the roller surfaces of the more than one roller form friction action surfaces of different driving wheels of the motor vehicle to be tested respectively.

The invention also aims to provide a method for measuring the stress or moment of a large-size heavy component by adopting the device.

The measuring device adopting the technical scheme has the following advantages:

1. the structure is simple, the parts are few, the size is small, and the precision is high;

2. the power consumption is small and the adjustment is convenient;

3. no abrasion and long service life.

Drawings

FIG. 1 is a schematic structural diagram of a measuring device according to the present invention;

FIG. 2 is a schematic perspective view of a measuring device according to the present invention;

FIG. 3 is a schematic view of the rolling support part of the spindle roller of the present invention, and FIGS. 3a and 3b are schematic views from different angles, respectively, wherein FIG. 3a is a top view of FIG. 3b, and for convenience of illustration, a casing of a dynamometer motor is deleted in FIG. 3 a;

FIG. 4 is a schematic diagram of the present hydraulic oil supply;

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

The invention solves the problem of measuring the stress or moment of the large-size heavy component by adopting the hydrostatic bearing equipment to replace the large-size heavy component to deform by the elastic body.

An example of an application to a chassis dynamometer project is shown. In the figure 3, a main shaft roller rolling supporting part is shown, 11 is a joint bearing, a rolling supporting oil circuit block 12 connected to the surface of the dynamometer motor shell 7 is fixed on a fixed seat 13, 10 is a rolling supporting adjusting mechanism, 14 is a swinging shaft, and 15 is a fixed seat of the formed swinging bearing.

Fig. 4 is a schematic diagram of hydraulic oil supply. The hydraulic oil makes the dynamometer motor and the supporting part completely separated by an oil film or an air film, thereby greatly reducing the influence caused by surface processing errors and enabling the support to have high motion precision. When the oil supply pressure rises, the shell of the dynamometer motor swings around the main shaft.

Fig. 1 and 2 show a main body part of a chassis dynamometer, a spindle roller 3 is fixed on two sides of a rotor 1 of a dynamometer motor, a dynamometer component is 5, a dynamometer is 2, a dynamometer arm 6 is fixed on the surface of a shell 7 of the dynamometer motor and is suspended on a floating base 4, and the specific structure of the floating base 4 refers to the specific structure in fig. 3. In the test process, when the driving wheel of the motor vehicle contacts with the surface 31 of the spindle roller 3, the spindle roller 3 is driven to rotate, at the moment, the rotor 3 of the dynamometer motor also rotates, the floating stator coaxial with the rotor is provided with an excitation winding, and when no current flows through the excitation winding, the rotor is not influenced by the braking torque. When the dynamometer roller rotates stably and gives a certain current to the magnet exciting coil, the brake torque which has a loading effect on the roller is equal to the driving torque of the driving wheel on the main shaft roller. According to the principle of acting force and reacting force, the magnitude of the electric torque of the dynamometer stator swinging around the spindle is equal to the braking torque of the dynamometer stator. Therefore, the torque of the driving wheel of the motor vehicle can be obtained only by measuring the electromagnetic torque borne by the stator. The electromagnetic torque borne by the stator is measured by mounting a force measuring arm on the shell of the dynamometer stator and mounting a driving force sensor below the end part of the force measuring arm, when the dynamometer measures the force, the electromagnetic torque acting on the stator enables the floating shell to swing around the main shaft, so that the force measuring arm is driven to act on the force sensor to output an electric signal, and the product of the force F and the length L of the force measuring arm is the electromagnetic torque value borne by the stator. The value is the driving torque of the driving wheel to the roller.

In the invention, the lower part of the dynamometer motor shell forms a pivot through the oscillating bearing and the base thereof, the two sides of the dynamometer motor shell are supported by the floating base formed by the hydrostatic bearing, and the final required value is obtained by reading and calculating the torque and the torque generated by the torsion of the dynamometer arm under the buffer action of an oil film or an air film.

The force-measuring arm 6 in the figure extends radially outwards in the horizontal direction in a static state, and the dynamometer 2 and its dynamometer components are arranged below the arm body of the dynamometer in a position close to the outer side.

In fig. 2, two spindle drums 3 are provided, the upper drum surfaces 31 of which can be used for carrying the front and rear wheels of the motor vehicle to be tested, respectively.