CN115165178A

CN115165178A - Torque testing system

Info

Publication number: CN115165178A
Application number: CN202210929300.2A
Authority: CN
Inventors: 夏冰玉; 范海艇; 王军; 李何良; 王振; 韩晓萌
Original assignee: Shanghai Institute of Quality Inspection and Technical Research
Current assignee: Shanghai Institute of Quality Inspection and Technical Research
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-10-11

Abstract

The invention relates to a torque testing system, which comprises a torque standard machine output shaft, a temperature control system, an elastic body and an information acquisition and processing system, and is characterized in that: the lower part of the output shaft of the torque standard machine is connected with a flexible connecting part, and the lower part of the flexible connecting part is connected with an elastic body. The invention has the advantages that the spoke type structure is adopted as the elastic strain body, and the smaller sensor size is realized. And a flexible connecting part is added, axial buffering and flexibility are provided, the influence of non-torque external force is reduced, and the measurement precision is submitted. The temperature control system can independently test the torque within different temperature ranges at different time, and can also provide a constant temperature test effect on site. The portable constant-temperature and variable-temperature test device has the advantages of simple structure, convenience in operation, reliable performance and portability, can realize constant-temperature and variable-temperature tests in laboratories and sites, and can be used in micro-seismic environments and unconventional temperature environments.

Description

Torque testing system

Technical Field

The invention belongs to the technical field of torque measurement, relates to calibration of a torque standard machine, and particularly designs a torque test system.

Background

A torque standard device is a device for metering torque production. The torque testing system is mainly used for calibrating the torque standard machine. Typically, calibration of torque machines employs either axial or flange type torque sensors. Meanwhile, flexible couplings are needed at two ends to reduce measurement errors caused by different shafts. The axial sensor is long and occupies a large space. The flange type sensor has a large diameter, needs a large adapter flange for connection, and occupies a large space. Meanwhile, the existing sensor has no defense measure for the axial force, and the influence of the axial force on the measurement result cannot be avoided. Especially in a micro-vibration environment, a large error may be caused to the measurement result.

Disclosure of Invention

The present invention addresses the above-mentioned problems and provides a torque testing system.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a torque testing system, includes torque standard machine output shaft, temperature control system (1), elastomer (3), information acquisition processing system (4), its characterized in that: the lower part of the output shaft of the torque standard machine is connected with a flexible connecting part (2), and the lower part of the flexible connecting part (2) is connected with an elastic body (3). The temperature control system is arranged on the outer sides of the output shaft (15), the flexible connecting part (2) and the elastomer (3) of the torque standard machine, comprises a left box body, a right box body (5, 6), an electric heating tube (7), a temperature measuring sensor (8), a support frame (9) and a temperature control system (10), the left box body and the right box body are made of heat-insulating foamed plastic, aluminum alloy sheets are wrapped on the outer sides of the left box body and the right box body, and semicircular grooves are formed in the inner side faces of the left box body and the right box body and used for enabling the output shaft of the torque standard machine to pass through. The box internally mounted has a plurality of electrothermal tubes, and the electrothermal tube is reciprocal bending type structure, hugs closely inside the box, and 1 temperature sensor is respectively installed to box edge department all around, and the bottom half is the support frame, and the support frame comprises many lever structures, and many lever structures pass through screw locking fixed or relax, and temperature control system comprises 2 parts, and partly hangs and leans on left box, and another part contains in information acquisition processing system. The flexible connecting part is formed by combining a group of stacked disc-shaped discs (11) and a switching piece, the inner discs of the disc-shaped discs are slightly higher than the outer discs, positioning steps for positioning are arranged on the inner discs and the outer discs, the disc-shaped discs are stacked and locked through bolts, the topmost disc-shaped disc is fixed with the switching piece (12), the bottommost disc-shaped disc is fixed with an elastic body (13), strain sheets are attached to the topmost disc-shaped disc, the strain sheets are circumferentially and uniformly distributed on a thin steel sheet, and a bridge circuit is formed by each strain sheet independently. The adaptor is hollow and cylindrical. The bottom and the top are both provided with positioning steps, the bottom is fixedly connected with the small round disc at the uppermost part of the disc-shaped disc group, and the top is fixedly connected with an output shaft (15) of the torque standard machine through a heat insulation sheet (14). The elastomer is the spoke structure, has a plurality of billets to be connected between little disc of inner circle and the big disc of outer lane, and the billet adopts the design of equi-stress structure, and the thickness that is close to the inner circle is great, and the thickness that is close to the outer lane is less, and terminal surface has all opened fixed screw hole about the inner circle, is provided with the location step, pastes a plurality of foil gages (16) on the elastomer, and the foil gage is by circuit connection. The information acquisition and processing system comprises an information acquisition system, a processing system and a control system, wherein the information acquisition system is used for supplying power to the strain gauge and the sensor and collecting signals of the strain gauge and the sensor, the processing system is used for amplifying and arranging feedback information, the control system comprises a temperature control system and a data visualization display for the strain gauge information, the information is automatically processed, and the use of different modes such as real-time data tracking and peak value acquisition is realized.

Compared with the prior art, the invention has the following beneficial effects:

the invention adopts the spoke type structure as the basic structure of the elastic strain body, and can realize smaller sensor size. Meanwhile, the flexible connecting part is added, axial buffering and flexibility are provided, the influence of non-torque external force is reduced, and the measurement precision is submitted. The problems of coaxiality and the like of the torque standard device can be monitored through the strain state of the flexible connecting component. In addition, a temperature control system is also configured, so that the torque test can be independently performed within different temperature ranges, and a constant temperature test effect can be provided on site. The invention has simple structure, convenient operation, reliable performance and convenient carrying, can realize constant temperature and variable temperature test in a laboratory and a site, and can be used in a micro-seismic environment and an unconventional temperature environment.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic perspective view of a temperature control system according to the present invention.

FIG. 3 is a schematic cross-sectional view of a temperature control system according to the present invention.

Fig. 4 is a schematic view showing the structure of the flexible connecting member and the elastic body according to the present invention.

Fig. 5 is a schematic view (top most) of the structure of the disc-shaped disc of the present invention.

Fig. 6 is a schematic structural view of a disc-shaped disc according to the present invention.

FIG. 7 is a schematic structural view of an elastomer of the present invention.

FIG. 8 is a schematic diagram of a strain gage according to the present invention.

Detailed Description

Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings so that those skilled in the art can more clearly understand how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.

A torque testing system in the figure comprises a torque standard machine output shaft 15, a temperature control system 1, an elastic body 3 and an information acquisition and processing system 4, and is characterized in that: the lower part of the output shaft of the torque standard machine is connected with a flexible connecting part 2, and the lower part of the flexible connecting part 2 is connected with an elastic body 3. The temperature control system is arranged on the outer sides of the output shaft, the flexible connecting part 2 and the elastomer 3 of the torque standard machine and comprises a left box body 5, a right box body 6, an electric heating tube 7, a temperature measuring sensor 8, a supporting frame 9 and a temperature control system 10, wherein the left box body and the right box body are made of heat-insulating foamed plastic, the outer sides of the left box body and the right box body are wrapped by aluminum alloy thin plates, and semicircular grooves are formed in the inner side faces of the left box body and the right box body and used for passing through the output shaft of the torque standard machine. The box internally mounted has a plurality of electrothermal tubes, and the electrothermal tube is reciprocal bending type structure, hugs closely inside the box, and 1 temperature sensor is respectively installed to box edge department all around, and the bottom half is the support frame, and the support frame comprises many lever structures, and many lever structures pass through screw locking fixed or relax, and temperature control system comprises 2 parts, and partly hangs and leans on left box, and another part contains in information acquisition processing system. The flexible connecting part is formed by combining a group of stacked disc-shaped discs 11 and a switching piece 12, the inner ring disc of each disc-shaped disc is slightly higher than the outer ring disc, positioning steps for positioning are arranged on the inner ring disc and the outer ring disc, the disc-shaped discs are stacked and locked through bolts, the topmost disc is fixed with the switching piece 12, the bottommost disc is fixed with an elastic body 13, a strain foil 17 is attached to the topmost disc, the strain foils are circumferentially and uniformly distributed on a thin steel sheet, and each strain foil forms a bridge circuit independently. The adaptor is hollow cylindrical. The bottom and the top are both provided with positioning steps, the bottom is fixedly connected with the small round disc at the uppermost part of the disc-shaped disc group, and the top is fixedly connected with an output shaft 15 of the torque standard machine through a heat insulation sheet 14. The elastomer is the spoke structure, has a plurality of billets to be connected between little disc of inner circle and the big disc of outer lane, and the billet adopts the design of equi-stress structure, and the thickness that is close to the inner circle is great, and the thickness that is close to the outer lane is less, and terminal surface has all opened fixed screw hole about the inner circle, is provided with the location step, pastes a plurality of foil gages 16 on the elastomer, and the foil gage is by circuit connection. The information acquisition and processing system comprises an information acquisition system, a processing system and a control system, wherein the information acquisition system is used for supplying power to the strain gauge and the sensor and collecting signals of the strain gauge and the sensor, the processing system is used for amplifying and arranging feedback information, the control system comprises a temperature control system and a data visualization display for the strain gauge information, the information is automatically processed, and the use of different modes such as real-time data tracking and peak value acquisition is realized.

When the torque testing device is used, the information acquisition and processing system is connected with the strain gauge of the torque testing system and the sensor data line. And starting up and preheating according to the specified time requirement. And opening the system and clearing the data.

And then, the torque testing system is installed in the tested device in series, and two ends of the torque testing system are isolated by the heat insulation sheets, so that the temperature loss is reduced. After the strain body and the flexible connecting part are installed, the temperature control system is installed according to the requirement.

The temperature control system control software is started, and required temperature conditions are provided for testing. And after the required temperature requirement is met, starting the tested device, and applying a load to the torque testing system. The information acquisition and processing system analyzes and records the torque and other external forces received by the torque testing system and compares the torque and other external forces with a standard value. The whole system is loaded and unloaded according to the specified steps, and data is automatically recorded at the required measuring range point.

The flexible connecting part can effectively reduce the error influence caused by different axial and axial vibration. Strain gages on the disk can monitor the different axial conditions produced by the device being tested during the measurement of torque.

Claims

1. The utility model provides a torque test system, includes moment of torsion standard machine output shaft (15), temperature control system (1), elastomer (3), information acquisition processing system (4), its characterized in that: the lower part of the output shaft of the torque standard machine is connected with a flexible connecting part (2), and the lower part of the flexible connecting part (2) is connected with an elastic body (3).

2. A further torque testing system according to claim 1, wherein: the temperature control system is arranged on the outer sides of the output shaft, the flexible connecting part (2) and the elastomer (3) of the torque standard machine and comprises a left box body, a right box body (5, 6), an electric heating tube (7), a temperature measuring sensor (8), a support frame (9) and a temperature control system (10), wherein the left box body and the right box body are made of heat-insulating foamed plastic, aluminum alloy sheets are wrapped on the outer sides of the left box body and the right box body, and semicircular grooves are formed in the inner side faces of the left box body and the right box body and used for passing through the output shaft of the torque standard machine.

3. A further torque testing system according to claim 2, wherein: the box internally mounted has a plurality of electrothermal tubes, the electrothermal tube is the reciprocal type structure of buckling, hug closely the box inside, 1 temperature sensor is installed respectively to the corner department around the box, the bottom half is the support frame, the support frame comprises many lever structures, many lever structures pass through screw locking fixed or relax, temperature control system comprises 2 parts, a part is hung and is leaned on left box, another part contains in information acquisition processing system.

4. A further torque testing system according to claim 1, wherein: the flexible connecting part is formed by combining a group of stacked disc-shaped discs (11) and a switching piece, the inner ring discs of the disc-shaped discs are slightly higher than the outer ring discs, positioning steps for positioning are arranged on the inner ring discs and the outer ring discs, the disc-shaped discs are stacked and locked through bolts, the topmost disc-shaped disc is fixed with the switching piece (12), the bottommost disc-shaped disc is fixed with an elastic body (13), strain pieces (17) are attached to the topmost disc-shaped disc, the strain pieces are circumferentially and uniformly distributed on thin steel sheets, and a bridge circuit is formed by each strain piece independently.

5. A further torque testing system according to claim 4, wherein: the adaptor is in a hollow cylinder shape; the bottom and the top are both provided with positioning steps, the bottom is fixedly connected with the small round disc at the uppermost part of the disc-shaped disc group, and the top is fixedly connected with an output shaft (15) of the torque standard machine through a heat insulation sheet (14).

6. A further torque testing system according to claim 1, wherein: the elastomer is the spoke structure, has a plurality of billets to be connected between little disc of inner circle and the big disc of outer lane, and the billet adopts the design of equi-stress structure, and the thickness that is close to the inner circle is great, and the thickness that is close to the outer lane is less, and terminal surface has all opened fixed screw hole about the inner circle, is provided with the location step, pastes a plurality of foil gages (16) on the elastomer, and the foil gage is by circuit connection.

7. A further torque testing system according to claim 1, wherein: the information acquisition and processing system (4) comprises an information acquisition system, a processing system and a control system, wherein the information acquisition system is used for supplying power to the strain gauge and the sensor and collecting signals of the strain gauge and the sensor, the processing system is used for amplifying and sorting feedback information, the control system comprises a temperature control system and a data visual display for the information of the strain gauge, the information is automatically processed, and the use of different modes such as real-time data tracking and peak value acquisition is realized.