CN106989868B - Method for calibrating output torque of speed reducer detector - Google Patents

Abstract

The invention discloses a method for calibrating the output torque of a reducer detector, which uses a calibrator and the following steps to calibrate: 1) verifying the calibrator, obtaining the input torque value of the calibrator during the verification and the torsional deformation angle value of the torsion bar during the verification Correspondence between; 2) Obtain the torsional deformation angle value of the torsion bar during calibration, use the torsion deformation angle value of the torsion bar during calibration to replace the torsional deformation angle value of the torsion bar during verification, and find out the calibrator during verification from the corresponding relationship The input torque value, the torque value is the output torque value of the reducer tester, the torque sensor of the reducer tester replaces the output of the read value at the corresponding moment, and the read value and output value of the torque sensor of the reducer tester are obtained The corresponding relationship between is applied when using the reducer tester for torque measurement. The invention can quickly calibrate the torque sensor of the reducer measuring instrument on site, makes the torque measurement of the reducer measuring instrument more accurate, and realizes precision traceability.

Description

A Calibration Method for Output Torque of a Reducer Detector

technical field

The invention relates to a method for calibrating torque, in particular to a method for calibrating output torque of a speed reducer detector.

Background technique

The torque sensor is the core component of the reducer test device, and the measured torque value is also an important basic quantity representing the performance of the reducer, so the calibration of the torque sensor is very important. At present, the torque sensors of domestic reducer test devices are all traced to the source of accuracy by submitting for inspection, and only a few domestic verification institutions have the ability to verify the torque value above 5000Nm, which is not only troublesome to disassemble, but also takes too long to verify. To the normal detection work of the user unit, errors such as coaxiality caused by disassembly and assembly also affect the accuracy of the indication. In addition, the torque calibration method of the existing reducer test device is to directly measure the output end of the torque sensor. However, since the torque sensor is often not directly connected to the reducer under test, there is a transmission chain between the torque sensor and the reducer under test. , the calibration state is inconsistent with the use state, because the coaxiality error, deformation, friction and other influencing factors will cause the loss of torque in the transmission, and then cause the actual torque value acting on the reducer (the output torque of the reducer test device) and the torque There is a deviation in the reading value of the sensor, so the output torque of the reducer test device needs to be calibrated to solve the problem that the torque loss in the transmission chain cannot be calibrated and compensated.

Contents of the invention

The present invention provides a method for calibrating the output torque of a speed reducer tester in order to solve the technical problems in the known technology. By adopting the calibration method, the output torque of the speed reducer test device can be calibrated conveniently at the site where the speed reducer test device is used.

The technical solution adopted by the present invention to solve the technical problems in the known technology is: a method for calibrating the output torque of the reducer detector, using a calibrator for calibrating, the calibrator includes a torsion bar, and the upper end of the torsion bar It is the torque input end connected to the output end of the reducer detector, the lower end is the fixed end, the installation frame I is fixedly connected to the upper part of the torsion bar, and the installation frame II is fixedly connected to the lower part of the torsion bar. A circular grating scale is installed on the mounting frame II, and the circular grating scale is coaxially arranged with the torsion bar. A reading head adapted to the circular grating scale is installed on the mounting frame I, and the reading head is connected to the rotating rod. The data display and recording device are connected; the method adopts the following steps: one) verifying the calibrator: adopting the torque measuring instrument of the instrument verification department to gradually apply torque to the calibrator from small to large, until the set value, the reading The head and the circular grating scale obtain the torsional deformation angle value of the torsion rod during the verification, and the data display and recording device obtains the corresponding relationship between the input torque value of the calibrator during the verification and the torsional deformation angle value of the torsion rod during the verification; 2) Use the calibrator to calibrate the output torque of the reducer detector: fix the lower end of the torsion rod, connect the upper end to the output end of the reducer detector, and start the reducer detector to give the calibrator from small to large Torque is gradually applied, and the torsional deformation angle value of the torsion bar during calibration is obtained through the reading head and the circular grating ruler, and the torsional deformation angle value of the torsion bar during calibration is used to replace the torsional deformation angle value of the torsion bar during verification. Find the input torque value of the calibrator during the verification from the corresponding relationship between the input torque value of the calibrator and the torsional deformation angle value of the torsion bar during the verification, and the input torque value of the calibrator during the verification is the output of the reducer detector Torque value, the torque sensor of the reducer tester replaces the output of the read value at the corresponding moment, and obtains the corresponding relationship between the read value and the output value of the torque sensor of the reducer tester, when using the reducer tester for torque measurement application.

Both the installation frame I and the installation frame II adopt a cylindrical structure, and are set on the outside of the torsion bar. The installation frame I is fixed on the upper part of the torsion bar through a connecting flange, and the connecting flange It is arranged on the upper part of the torsion bar, and the two are integrally formed; the installation frame II is fixed on the lower part of the torsion bar through a fixed plate, and the fixed plate is set on the lower end of the torsion bar, and the two is integrally formed.

The advantages and positive effects of the present invention are: by using the torsion bar, the problem that the traditional measurement method cannot calibrate the transmission chain torque loss error between the torque sensor and the measured speed reducer in the reducer measurement device is solved, and the torsion of the transmission chain Errors caused by deformation, friction, coaxiality, etc. can be calibrated together, and the torque sensor of the reducer measuring instrument can be quickly calibrated on site, so that the torque measurement of the reducer measuring instrument is more accurate and the accuracy can be traced. Moreover, the invention is convenient to use and can improve calibration efficiency.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the calibrator adopted in the present invention;

Fig. 2 is a main sectional view of the calibrator used in the present invention.

In the figure: 1. Fixed plate; 2. Mounting frame II; 3. Torsion bar; 4. Circular scale; 5. Reading head; 6. Mounting frame I; 7. Connecting flange; 8. Torque input end; Data display and recording device.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Fig. 1 and Fig. 2, a method for calibrating the output torque of a speed reducer tester, using a calibrator for calibration, the calibrator includes a torsion rod 3, and the upper end of the torsion rod 3 is connected to the output end of the speed reducer tester The connected torque input end 8, the lower end is a fixed end, the upper part of the torsion bar 3 is fixed with the installation frame I6, and the lower part of the torsion bar 3 is fixed with the installation frame II2, and the installation frame II2 is installed There is a circular grating scale 4, the circular grating scale 4 is arranged coaxially with the torsion bar 3, and a reading head 5 adapted to the circular grating scale 4 is installed on the mounting frame I6, and the reading head 5 Connect with data display and recording device 9.

The above method takes the following steps:

1) Verification of the calibrator: Use the torque measuring instrument of the instrument verification department to gradually apply torque to the calibrator from small to large until the set value, and the reading head 5 and the circular grating ruler 4 are reversed when they are verified. For the torsional deformation angle value of the rod 3, the data display and recording device 9 obtains the corresponding relationship between the input torque value of the calibrator during the verification and the torsional deformation angle value of the torsion rod during the verification.

2) Use the calibrator to calibrate the output torque of the reducer detector: fix the lower end of the torsion rod 3, connect the upper end to the output end of the reducer detector, start the reducer detector to give the calibrator from small to Apply torque step by step, and obtain the torsional deformation angle value of the torsion rod 3 during calibration through the reading head 5 and the circular grating ruler 6; use the torsion deformation angle value of the torsion rod during calibration to replace the torsion deformation angle value of the torsion rod during verification , find out the input torque value of the calibrator during the verification from the corresponding relationship between the input torque value of the calibrator during the verification and the torsional deformation angle value of the torsion rod during the verification, and the input torque value of the calibrator during the verification is the reducer The output torque value of the tester is replaced by the torque sensor of the reducer tester at the corresponding moment, and the corresponding relationship between the read value and the output value of the torque sensor of the reducer tester is obtained. Applied when torque measurement is performed.

In this embodiment, both the mounting frame I6 and the mounting frame II2 adopt a cylindrical structure and are sleeved on the outside of the torsion bar 3, and the mounting frame I6 is fixed on the torsion bar through a connecting flange 7 6, the connecting flange 7 is arranged on the upper part of the torsion bar 3, and the two are integrally formed; the installation frame II2 is fixed on the lower part of the torsion bar 3 through the fixed plate 1, and the fixing The disk 1 is arranged at the lower end of the torsion bar 3, and the two are integrally formed. The above-mentioned data display and recording device 9 can adopt a computer.

Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art Under the enlightenment of the present invention, people can also make many forms without departing from the purpose of the present invention and the scope of protection of the claims, and these all belong to the protection scope of the present invention.

Claims (2)

1. The output torque calibration method of the reducer detector is characterized in that a calibrator is adopted for calibration, the calibrator comprises a torsion bar, the upper end of the torsion bar is a torque input end connected with the output end of the reducer detector, the lower end of the torsion bar is a fixed end, an installation frame I is fixedly connected to the upper portion of the torsion bar, an installation frame II is fixedly connected to the lower portion of the torsion bar, a circular grating ruler is installed on the installation frame II, the circular grating ruler and the torsion bar are coaxially arranged, a reading head matched with the circular grating ruler is installed on the installation frame I, and the reading head is connected with a data display and recording device;

the method comprises the following steps:

one) certifying the calibrator: a torque measuring instrument of an instrument verification department is adopted to gradually apply torque to the calibrator from small to large until a set value is reached, the reading head and the circular grating ruler obtain a torsional deformation angle value of the torsion bar during verification, and the data display and recording device obtains a corresponding relation between an input torque value of the calibrator during verification and the torsional deformation angle value of the torsion bar during verification;

secondly), the output torque of the speed reducer detector is calibrated by adopting the calibrator: fixing the lower end of the torsion bar, connecting the upper end of the torsion bar with the output end of a reducer detector, starting the reducer detector to gradually apply torque to the calibrator from small to large, obtaining a torsional deformation angle value of the torsion bar during calibration through the reading head and the circular grating ruler, replacing the torsional deformation angle value of the torsion bar during calibration with the torsional deformation angle value of the torsion bar during calibration, finding out an input torque value of the calibrator during calibration from a corresponding relation between the input torque value of the calibrator during calibration and the torsional deformation angle value of the torsion bar during calibration, wherein the input torque value of the calibrator during calibration is an output torque value of the reducer detector, replacing a read value at a corresponding moment with the reducer detector torque sensor to output, obtaining a corresponding relation between a read value and an output value of the reducer detector torque sensor, and applying the reducer detector to measure torque.

2. The method for calibrating the output torque of the reducer detector according to claim 1, wherein the mounting frame I and the mounting frame II are both of a cylindrical structure and are sleeved outside the torsion bar, the mounting frame I is fixed on the upper portion of the torsion bar through a connecting flange, the connecting flange is arranged on the upper portion of the torsion bar, and the mounting frame I and the mounting frame II are integrally formed; the mounting rack II is fixed to the lower portion of the torsion bar through a fixing disc, the fixing disc is arranged at the lower end of the torsion bar, and the fixing disc and the torsion bar are integrally formed.

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