CN203534824U - An inner and outer double-rotor fault simulation experiment table based on elastic foundation - Google Patents

Abstract

The utility model discloses an inner and outer double-rotor fault simulation experiment table based on elastic foundation and relates to an aeroengine experimental facility. The structure of the experiment table is mainly characterized in that an inner rotating shaft is disposed in an outer rotating shaft and the two rotating shafts have superposed central axes and are mechanically coupled by an intermediary supporting structure; that an inner rotor driving motor is disposed on an inner rotor driving motor seat and is connected with the inner rotating shaft through a main shaft coupling, that an inner rotor left wheel disc, an inner rotor left supporting structure, an inner rotor right wheel disc, and an inner rotor right supporting structure which are sleeved on the inner rotating shaft are successively connected along a central axis, and that an outer rotor left supporting structure, an outer rotor left wheel disc, an outer rotor right wheel disc which are sleeved on the outer rotating shaft are successively connected along a central axis. The experiment table employs elastic support with adjustable rigidity, and may detect influence of supporting rigidity on the power characteristics of the double rotors and simulate mechanical failures such as mass unbalance, rotor collision and friction, and support looseness of the double rotors of the aeroengine.

Description

A Fault Simulation Experiment Bench for Internal and External Dual Rotors Based on Elastic Foundation

technical field

The utility model relates to an aero-engine experiment device, in particular to an inner and outer double-rotor failure simulation experiment platform based on an elastic foundation.

Background technique

The aero-engine is the power unit of the aircraft, and its health and reliability affect the flight safety. With the rapid development of the air transport industry, the complexity and manufacturing costs of aircraft continue to increase, and the reliability of aero-engines has an increasingly prominent impact on the operating costs of enterprises. Therefore, in order to make the engine run safely and efficiently and save maintenance costs, it is necessary to understand the operating conditions of the engine, grasp its changing rules and trends, and monitor and diagnose faults in real time for key components.

At present, most researches on aero-engine fault diagnosis focus on the analysis of fault mechanism and the exploration of diagnostic methods. Due to the high cost of aero-engines and the high cost of test runs, theoretical verification often relies on fault simulation test benches. At present, there are very few dual-rotor test benches for simulating aero-engine rotor failures in China. The existing dual-rotor test bench only retains the typical structure of the dual-rotors of the aero-engine, but the positioning of the discs used to simulate the blades of the compressor and turbine stages on the rotor is relatively random, and no consideration is given to the actual aero-engine machine. The aerodynamic force and elastic force on the box are simulated. These simplified test benches deviate greatly from the actual conditions of the engine, which limits the experimental research on its fault characteristics.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and to provide an internal and external dual-rotor fault simulation test platform based on elastic foundation.

The purpose of this utility model is achieved in that:

The structure of the internal and external dual-rotor fault simulation test bench based on the elastic foundation is: an inner rotating shaft is set inside the outer rotating shaft, the central axes of the two coincide, and they are mechanically coupled through an intermediary support structure;

A base is arranged on the elastic foundation;

In the middle of the base, from left to right, the inner rotor driving motor base, the inner rotor left support structure, the outer rotor left support structure and the inner rotor right support structure are respectively arranged, which are respectively connected to the base by fastening bolts;

The inner rotor driving motor base is provided with an inner rotor driving motor, the inner rotor driving motor is connected with the inner rotating shaft through the main coupling, the inner rotor left wheel disc, the inner rotor left supporting structure, and the inner rotor right wheel are sleeved on the inner rotating shaft. The disk and the right support structure of the inner rotor are sequentially connected along the central axis; the left support structure of the outer rotor sleeved on the outer shaft, the left wheel disc of the outer rotor, and the right wheel disc of the outer rotor are connected sequentially along the central axis;

On the front of the base, from left to right, the front outer rotor drive motor base, the first support structure and the second support structure are arranged in sequence, and the front outer rotor drive motor is arranged on the front outer rotor drive motor base. The outer rotor driving motor, the front coupling, the first supporting structure, the front pulley and the second supporting structure are sequentially connected along the front axis;

On the back of the base, from left to right, the rear outer rotor drive motor frame, the rear one support structure and the rear two support structures are arranged in sequence, and the rear outer rotor drive motor is arranged on the rear outer rotor drive motor frame. The outer rotor drive motor, the rear coupling, the first support structure, the first pulley, the second pulley and the second support structure are sequentially connected along the rear axis;

The outer rotating shaft is driven by the front pulley, the rear first pulley and the rear two pulleys arranged on the front axis and the rear axis through the front belt, the rear first belt and the rear two belts respectively;

The front exciter is installed on the front end of the base, perpendicular to the central axis, and the right exciter is installed on the right end of the base, parallel to the central axis;

Install the rubbing device at the position of the roulette to be tested so that the rubbing inner ring surrounds the outer circumference of the roulette to be tested, and install two piezoelectric speed sensors at 90° on the rubbing outer ring of the rubbing device;

An eddy current displacement sensor is respectively installed near the inner shaft and the outer shaft.

Compared with the prior art, the utility model has the following advantages and positive effects:

1. The elastic support with adjustable stiffness can be used to test the influence of the support stiffness on the dynamic characteristics of the dual rotors;

2. It can simulate mechanical failures such as aero-engine dual-rotor mass imbalance, rotor rubbing and support loosening;

3. Use rubbing device to simulate dynamic and static rubbing;

4. The elastic adjustable elastic foundation is used to simulate the elastic force outside the casing;

5. The exciter is used, arranged in the direction perpendicular and parallel to the axial direction, to simulate the vibration of the casing.

Description of drawings

Figure 1 is a schematic diagram of the structure of the test bench (front view);

Figure 2 is a schematic diagram of the structure of the test bench (top view);

Figure 3 is a schematic diagram of the structure of the test bench (side view);

Figure 4.1 is a schematic structural diagram (front view) of the rubbing device.

Figure 4.2 is a schematic structural diagram (side view) of the rubbing device.

In the picture:

00—elastic foundation; 01—base; 02—inner rotor drive motor base;

03—Inner rotor drive motor; 04—Main coupling; 05—Inner shaft;

06—Left disc of inner rotor; 07—Left support structure of inner rotor;

08—left support structure of outer rotor; 09—outer shaft; 10—left wheel of outer rotor;

11—right wheel of outer rotor; 12—intermediate support structure;

13—right disc of inner rotor; 14—right supporting structure of inner rotor;

15-1—front outer rotor drive motor, 15-2—rear outer rotor drive motor;

16-1—the first support structure, 16-2—the first two support structures,

16-3—the last supporting structure, 16-4—the second supporting structure;

17-1—front pulley, 17-2—rear pulley, 17-3—rear two pulleys;

18-1—front belt, 18-2—rear belt, 18-3—rear two belts;

19-1—front exciter, 19-2—right exciter;

20—rubbing device, 20-1—rubbing support, 20-2—rubbing outer ring,

20-3—friction inner ring, 20-4—friction screw;

21-1—front coupling, 21-2—rear coupling;

22-1—front outer rotor drive motor base, 22-2—rear outer rotor drive motor base;

A—Eddy current displacement sensor;

B—Piezoelectric speed sensor.

Detailed ways

The following will be described in detail in conjunction with the accompanying drawings and embodiments.

1. The structure of the test bench

1. Overall

As shown in Figures 1, 2, and 3, this test bench includes elastic foundation 00, base 01, inner rotor drive motor base 02, inner rotor drive motor 03, main coupling 04, inner shaft 05, inner rotor left wheel disc 06, inner rotor Rotor left support structure 07, outer rotor left support structure 08, outer shaft 09, outer rotor left wheel disc 10, outer rotor right wheel disc 11, intermediate support structure 12, inner rotor right wheel disc 13, inner rotor right support structure 14, front Outer rotor drive motor 15-1, rear outer rotor drive motor 15-2, front one support structure 16-1, front two support structures 16-2, back one support structure 16-3, back two support structures 16-4, front Pulley 17-1, rear one pulley 17-2, rear two pulleys 17-3, front belt 18-1, rear one belt 18-2, rear two belts 18-3, front exciter 19-1, right excitation Device 19-2, rubbing device 20, front coupling 21-1, rear coupling 21-2, front outer rotor drive motor support 22-1, rear outer rotor drive motor support 22-2, eddy current Displacement sensor A and piezoelectric speed sensor B;

Its position and connection relationship are:

An inner rotating shaft 05 is arranged inside the outer rotating shaft 09, the central axes of the two coincide, and are mechanically coupled through the intermediary support structure 12;

A base 01 is arranged on the elastic foundation 00;

In the middle of the base 01, from left to right, the inner rotor drive motor frame 02, the inner rotor left support structure 07, the outer rotor left support structure 08 and the inner rotor right support structure 14 are respectively arranged, and the fastening bolts and Base 01 connection;

The inner rotor driving motor 03 is arranged on the inner rotor driving motor base 02, the inner rotor driving motor 03 is connected with the inner rotating shaft 05 through the main coupling 04, the inner rotor left wheel disc 06 and the inner rotor left wheel disc 06 sleeved on the inner rotating shaft 05 The support structure 07, the inner rotor right disc 13 and the inner rotor right support structure 14 are sequentially connected along the central axis; the outer rotor left support structure 08 sleeved on the outer shaft 09, the outer rotor left disc 10 and the outer rotor right disc 11 are The axes are sequentially connected;

On the front of the base 01, from left to right, the front outer rotor drive motor frame 22-1, the previous support structure 16-1 and the first two support structures 16-2 are arranged successively. 22-1 is provided with a front outer rotor drive motor 15-1, a front outer rotor drive motor 15-1, a front coupling 21-1, a front support structure 16-1, a front pulley 17-1 and a front second support structure 16-2 are sequentially connected along the front axis;

On the back of base 01, from left to right, rear outer rotor drive motor frame 22-2, rear one support structure 16-3 and rear two support structures 16-4 are arranged successively, and rear outer rotor drive motor frame 22-2 is provided with rear outer rotor drive motor 15-2, rear outer rotor drive motor 15-2, rear coupling 21-2, rear support structure 16-3, rear first pulley 17-2, rear two pulleys 17-3 and the rear two supporting structures 16-4 are sequentially connected along the rear axis;

The outer rotating shaft 09 passes through the front belt 18-1, the back belt 18-2 and the back two belts respectively by the front pulley 17-1, the back one pulley 17-2, and the back two pulleys 17-3 which are arranged on the front axis and the rear axis. 18-3 drive;

The front exciter 19-1 is installed on the front end of the base 01, perpendicular to the central axis, and the right exciter 19-2 is installed on the right end of the base 01, parallel to the central axis;

Install the rubbing device 20 at the position of the roulette to be tested so that the rubbing inner ring 20-3 surrounds the outer circumference of the roulette to be tested, and install two rubbing rings 20-2 of the rubbing device 20 at 90°. Piezoelectric speed sensor B;

An eddy current displacement sensor A is respectively installed near the inner rotating shaft 05 and the outer rotating shaft 09 .

2. Working mechanism

The inner rotor drive motor 03 drives the inner rotor shaft 05, the inner rotor left wheel 06 and the inner rotor right wheel 13 through the main coupling 04 to simulate the speed and torque of the low pressure rotor;

The inner rotor left wheel 06 and the inner rotor right wheel 13 are respectively mounted on the left and right sides of the inner shaft 05 through expansion coupling sleeves, and the outer rotor left wheel 10 and outer rotor right wheel 11 are respectively installed on the outer shaft 09 through expansion coupling sleeves. On the left and right sides, there are evenly arranged holes on the outer circumference of the above four wheels, which are used to install balance bolts to simulate mass imbalance;

The rubbing experiment is carried out through the rubbing device 20 to obtain vibration signals under the conditions of different rubbing forms, different rubbing positions, different support stiffnesses, and different speed ratios;

By adjusting the balance bolts on the wheel disc to be tested, the mass unbalance experiment is carried out to obtain vibration signals under different mass unbalance amounts, different unbalance positions, different support stiffnesses and different speed ratios;

By artificially loosening the fastening bolts of the support structure to a certain extent and axially limiting them, the vibration signals of different support loose positions, different loose degrees, different support stiffnesses, and different speed ratios are obtained.

3. Functional components

Except for the elastic foundation 00 and the rubbing device 20, the following functional parts are common parts; or they are standard parts and can be purchased directly; or they can be designed and processed by themselves for simple structures.

* Elastic base

The elastic foundation is composed of a cement platform, a compression spring and the upper and lower connections of the foundation;

The cement platform is a square cement slab;

The compression springs include a total of 6 spring groups in front and rear rows; each spring group includes three left, middle and right springs with decreasing height and diameter;

The foundation is a square concrete foundation.

By sinking the cement platform for a certain distance, gradually making 6, 12 and 18 springs work in sections, the supporting stiffness of the elastic foundation can be changed.

* The base 01 is made of cast iron, which is anti-vibration.

* Inner rotor drive motor base 02, front outer rotor drive motor base 22-1, and rear outer rotor drive motor base 22-2 are customized according to the corresponding motors.

* The inner rotor drive motor 03, the front outer rotor drive motor 15-1, and the rear outer rotor drive motor 15-2 are all DC motors of the same type, which can achieve uniform speed.

* The main coupling 04 is a flexible coupling, which can compensate for the relative offset of the axes of the coupled two shafts, and has the performance of buffering and shock absorption.

* Inner shaft 05 and outer shaft 09 are made of medium carbon quenched and tempered steel, which has sufficient strength and toughness.

*Inner rotor left disc 06, inner rotor right disc 13, outer rotor left disc 10 and outer rotor right disc 11 are all made of 25Cr2MoV, which has sufficient wear resistance and is suitable for rubbing experiments.

* The inner rotor left support structure 07, the inner rotor right support structure 14 and the outer rotor left support structure 08 are all composed of supports, bearings and squirrel-cage elastic supports, and the support stiffness is adjusted by changing the squirrel-cage elastic supports.

* The intermediate support structure 12 is composed of needle roller bearings, with a compact radial structure, suitable for support results with limited radial installation dimensions.

* The first support structure 16-1, the second support structure 16-2, the first support structure 16-3, and the second support structure 16-4 are all composed of bearings and supports, and the stiffness cannot be adjusted.

* The front pulley 17-1, the rear pulley 17-2, and the rear two pulleys 17-3 are standard parts, which are selected according to the actual situation.

* The front belt 18-1, the rear belt 18-2, and the rear two belt 18-3 are flat belts, which are selected according to the actual situation.

* Both the front exciter 19-1 and the right exciter 19-2 are standard parts, and they are selected according to the actual situation.

* Touch rubbing device 20

The rubbing device 20 is composed of a rubbing support 20-1, a rubbing outer ring 20-2, a rubbing inner ring 20-3 and a rubbing screw 20-4;

The rubbing outer ring 20-2 is arranged on the rubbing support 20-1, the rubbing inner ring 20-3 is arranged in the rubbing outer ring 20-2, the rubbing outer ring 20-2 and the rubbing inner ring The centers of circles of 20-3 coincide, and rubbing screws 20-4 are evenly arranged on the rubbing outer ring 20-2.

The rubbing outer ring 20-2 and the rubbing inner ring 20-3 are formed by connecting two semicircular rings respectively, and are detachable so as to be conveniently installed on the outer periphery of the roulette to be tested during the experiment.

The rubbing inner ring 20-3 is installed in the rubbing outer ring 20-2, and is axially fixed. The rubbing inner ring 20-3 is radially deformed by the rubbing screw 20-4, and the rubbing inner ring 20-3 is changed. The gap between the wheel disc and the measured wheel is used to create rubbing, which can simulate single-point rubbing, two-point rubbing and full-circle rubbing.

* The front coupling 21-1 and the rear coupling 21-2 are rigid couplings for connecting the motor shaft and the front and rear drive shafts.

* Eddy current displacement sensor A

The eddy current displacement sensor A is an outsourced standard part for measuring vibration signals.

* Piezoelectric speed sensor B

Piezoelectric speed sensor B is an outsourced standard part for measuring vibration signals.

2. The experimental method of the test bench

1. Rubbing experiment

①Install the rubbing device 20 at the position of the roulette to be tested, so that the rubbing inner ring 20-3 surrounds the roulette to be tested (which can be the left roulette of the inner rotor 06, the right roulette of the inner rotor 13, the left roulette of the outer rotor 10 and On the outer circumference of any one or several of the right wheel discs 11 of the outer rotor, two piezoelectric speed sensors B are installed at 90° on the rubbing outer ring 20-2 of the rubbing device 20 (as shown in Figure 4.1);

②Start three drive motors (inner rotor drive motor 03, front outer rotor drive motor 15-1 and rear outer rotor drive motor 15-2), the stable outer rotor speed is 3600rpm, the inner rotor speed is 3000rpm, and the outer rotor speed ratio is 1.2 , adjust the rubbing screw 20-4 to change the amount of deformation of the rubbing inner ring 20-3, and measure the vibration signals of the rubbing outer ring 20-2 during single-point rubbing, two-point rubbing and full-circle rubbing respectively;

③Turn off the three driving motors, change the squirrel-cage elastic support in the support structure (which can be any one or several of the inner rotor front support structure 07, the inner rotor rear support structure 14 and the outer rotor front support structure 08), so that The support stiffness is changed, start three driving motors, and measure the vibration signals of the rubbing outer ring 20-2 during single-point rubbing, two-point rubbing and full-circle rubbing respectively;

④ Change the speed of the inner and outer rotors, increase or decrease the speed ratio of the inner and outer rotors, and measure the vibration signals of the rubbing outer ring 20-2 during single-point rubbing, two-point rubbing and full-circle rubbing respectively;

分别或同时启动前激振器19-1和右激振器19-2，分别测量单点碰摩、两点碰摩和整圈碰摩时碰摩外环20-2的振动信号；

Start the front exciter 19-1 and the right exciter 19-2 separately or simultaneously, and measure the vibration signals of the rubbing outer ring 20-2 during single-point rubbing, two-point rubbing and full-circle rubbing respectively;

The significance of the experiment is to obtain the vibration signals under the conditions of different rubbing forms, different rubbing positions, different support stiffnesses, different rotational speed ratios and exciting vibration forces.

2. Mass imbalance experiment

在内转轴05和外转轴09附近各安装一个电涡流位移传感器A，位置如图1、图2所示；

An eddy current displacement sensor A is installed near the inner shaft 05 and the outer shaft 09 respectively, and the positions are shown in Figure 1 and Figure 2;

调节待测轮盘（可以是内转子左轮盘06、内转子右轮盘13、外转子左轮盘10和外转子右轮盘11中的任一个或几个）上的平衡螺栓，使得轮盘质量不平衡；

Adjust the balance bolts on the wheel to be tested (which can be any one or several of the inner rotor left wheel 06, the inner rotor right wheel 13, the outer rotor left wheel 10 and the outer rotor right wheel 11) so that the mass of the wheel unbalanced;

启动三个驱动电机（内转子驱动电机03、前外转子驱动电机15-1和后外转子驱动电机15-2），稳定外转子转速为3600rpm，内转子转速为3000rpm，内外转子转速比1.2，测量质量不平衡时，内外转子水平和垂直方向的振动信号；

Start three drive motors (inner rotor drive motor 03, front outer rotor drive motor 15-1 and rear outer rotor drive motor 15-2), the stable outer rotor speed is 3600rpm, the inner rotor speed is 3000rpm, the inner and outer rotor speed ratio is 1.2, When measuring mass imbalance, the vibration signals of the inner and outer rotors in the horizontal and vertical directions;

关闭三个驱动电机，变换支承结构（可以是内转子前支承结构07、内转子后支承结构14和外转子前支承结构08中的任一个或几个）中的鼠笼式弹性支承，使得支承刚度改变，启动三个驱动电机，测量内外转子水平和垂直方向的振动信号；

Turn off the three driving motors, change the squirrel-cage elastic support in the support structure (which can be any one or several of the inner rotor front support structure 07, the inner rotor rear support structure 14 and the outer rotor front support structure 08), so that the support Stiffness changes, start three driving motors, and measure the vibration signals of the inner and outer rotors in the horizontal and vertical directions;

⑤ Change the speed of the inner and outer rotors, increase or decrease the speed ratio of the inner and outer rotors, and measure the horizontal and vertical vibration signals of the inner and outer rotors;

分别或同时启动前激振器19-1和右激振器19-2，测量内外转子垂直方向的振动的信号；

Start the front exciter 19-1 and the right exciter 19-2 separately or simultaneously, and measure the vibration signals of the inner and outer rotors in the vertical direction;

The significance of the experiment is to obtain vibration signals under the conditions of different mass unbalances, different unbalanced positions, different support stiffnesses, different rotational speed ratios and exciting vibration forces.

3. Bearing loosening test

An eddy current displacement sensor A is installed near the inner shaft 05 and the outer shaft 09 respectively, and the positions are shown in Figure 1 and Figure 2;

人为地将支承结构（可以是内转子前支承结构07、内转子后支承结构14和外转子前支承结构08中的任一个或几个）的紧固螺栓（和底座01紧固）松开一定程度，并对其进行轴向限位；

Artificially loosen the fastening bolts (fastened to the base 01) of the supporting structure (which can be any one or several of the inner rotor front supporting structure 07, the inner rotor rear supporting structure 14 and the outer rotor front supporting structure 08) to a certain extent. degree, and limit it axially;

启动三个驱动电机（内转子驱动电机03、前外转子驱动电机15-1和后外转子驱动电机15-2），稳定外转子转速为3600rpm，内转子转速为3000rpm，内外转子转速比1.2，测量支座松动时，内外转子垂直方向的振动的信号；

Start three drive motors (inner rotor drive motor 03, front outer rotor drive motor 15-1 and rear outer rotor drive motor 15-2), the stable outer rotor speed is 3600rpm, the inner rotor speed is 3000rpm, the inner and outer rotor speed ratio is 1.2, When the support is loose, the vibration signal of the inner and outer rotors in the vertical direction is measured;

Turn off the three driving motors, change the squirrel-cage elastic support in the support structure (which can be any one or several of the inner rotor front support structure 07, the inner rotor rear support structure 14 and the outer rotor front support structure 08), so that the support Stiffness changes, start three driving motors, and measure the vibration signals of the inner and outer rotors in the vertical direction;

⑤ Change the speed of the inner and outer rotors, increase or decrease the speed ratio of the inner and outer rotors, and measure the vibration signal of the inner and outer rotors in the vertical direction;

分别或同时启动前激振器19-1和右激振器19-2，测量内外转子垂直方向的振动的信号；

Start the front exciter 19-1 and the right exciter 19-2 separately or simultaneously, and measure the vibration signals of the inner and outer rotors in the vertical direction;

The significance of the experiment is to obtain the vibration signals under the conditions of different support loose positions, different loose degrees, different support stiffnesses, different speed ratios and excitation force.

4. Tests of rubbing, mass imbalance and support loosening can be carried out separately or simultaneously.

Claims (3)

1. the inner-outer birotor fault simulation experiment table based on elastic foundation, is characterized in that:

In outer shaft (09), be provided with interior rotating shaft (05), both central axes, by intermediary's supporting structure (12) mechanical couplings;

On elastic foundation (00), be provided with base (01);

Centre on base (01), from left to right, be respectively arranged with internal rotor drive motor support (02), the left supporting structure of internal rotor (07)), the left supporting structure of outer rotor (08) and the right supporting structure of internal rotor (14), by fastening bolt, be connected with base (01) respectively;

On internal rotor drive motor support (02), be provided with internal rotor drive motor (03), internal rotor drive motor (03) is connected with interior rotating shaft (05) by lead spindle (04), and the internal rotor left wheel disk (06), the left supporting structure of internal rotor (07), internal rotor right wheel disk (13) and the right supporting structure of internal rotor (14) that are enclosed within interior rotating shaft (05) are connected successively along central axis; The left supporting structure of outer rotor (08), outer rotor left wheel disk (10) and the outer rotor right wheel disk (11) that are enclosed within on outer shaft (09) are connected successively along central axis;

Before base (01), from left to right, be disposed with front outer rotor drive motor support (22-), last supporting structure (16-1) and the first two supporting structure (16-2), on front outer rotor drive motor support (22-1), be provided with front outer rotor drive motor (15-1), front outer rotor drive motor (15-1), front shaft coupling (21-1), last supporting structure (16-1), front belt pulley (17-1) and the first two supporting structure (16-2) are connected successively along front axis;

After base (01), from left to right, be disposed with rear outer rotor drive motor support (22-2), a rear supporting structure (16-3) and rear two supporting structures (16-4), on rear outer rotor drive motor support (22-2), be provided with rear outer rotor drive motor (15-2), rear outer rotor drive motor (15-2), rear shaft coupling (21-2), a rear supporting structure (16-3), a rear belt pulley (17-2), rear two belt pulleys (17-3) and rear two supporting structures (16-4) are connected successively along posterior axis;

Outer shaft (09) is driven by front belt (18-1), a rear belt (18-2) and rear two belts (18-3) respectively by the front belt pulley (17-1), a rear belt pulley (17-2), rear two belt pulleys (17-3) that are arranged in front axis and posterior axis;

Front vibrator (19-1) is installed on the front end of base (01), and perpendicular to central axis, right vibrator (19-2) is installed on the right-hand member of base (01), is parallel to central axis;

Touch the device that rubs (20) and be arranged on wheel disc to be measured position, make to touch the interior ring (20-3) that rubs and be enclosed in the periphery of wheel disc to be measured, on the outer shroud that rubs (20-2), be 90 ° two piezoelectric velocity sensors (B) are installed touching touching of the device that rubs (20);

Near interior rotating shaft (05) and outer shaft (09), an eddy current displacement sensor (A) is respectively installed.

2. by inner-outer birotor fault simulation experiment table claimed in claim 1, it is characterized in that:

Described elastic foundation (00) is connected to form up and down by cement platform, Compress Spring and ground;

Described cement platform is that a square cement is dull and stereotyped;

Before and after described Compress Spring comprises, two arrange totally 6 groups of springs, and each groups of springs comprises again the spring that three of left, center, right height and diameter successively decrease;

Described ground is a square mixed earth ground.

3. by inner-outer birotor fault simulation experiment table claimed in claim 1, it is characterized in that:

Described touch the device that rubs (20) by touching the bearing that rubs (20-1), touch the outer shroud that rubs (20-2), touch to rub interior ring (20-3) and touch mount screw (20-4) and form;

Be provided with and touch the outer shroud that rubs (20-2) touching on the bearing that rubs (20-1), in touching the outer shroud that rubs (20-), be provided with and touch the interior ring (20-3) that rubs, the center of circle of touching the outer shroud that rubs (20-2) and touching the interior ring (20-3) that rubs overlaps, and is evenly provided with and touches mount screw (20-4) touching on the outer shroud that rubs (20-2).

Images