CN2793709Y

CN2793709Y - Coupled torsional sensor

Info

Publication number: CN2793709Y
Application number: CN 200520095554
Authority: CN
Inventors: 赵勇; 谢文献; 周广军; 袁伯利; 齐文东; 王雄; 田心春
Original assignee: Kelong Instrument & Meter Inst Shashi District Jingzhou City
Current assignee: Kelong Instrument & Meter Inst Shashi District Jingzhou City
Priority date: 2005-03-19
Filing date: 2005-03-19
Publication date: 2006-07-05
Anticipated expiration: 2015-03-19

Abstract

The utility model relates to a shaft coupling type torque sensor, which is used for the torque on-line dynamic monitoring of large and medium motors. A shaft coupling is composed of a shaft coupling-shaped elastic body and a shaft sleeve which is connected to an inner hole of the elastic body through a spline and is matched with a motor shaft, wherein the cylindrical face of the elastic body is provided with a ring groove, the bottom part of which is stuck with a strain gauge bridge, a signal transmitting and processing circuit board and an emitting module are arranged in the ring groove, and are sealed and fixed by silica gel, the cylindrical face of the elastic body is provided with a secondary coil and a support seat out of the shaft coupling is provided with a primary coil so as to form a movable core power transformer which can provide power to the sensor. The sensor is arranged on an output shaft of the motor to be measured in the form of the shaft coupling to transmit loads so as to obtain direct and true results, and can efficiently solve the problem of the faithful torque on-line dynamic monitoring of the large and the medium motors by replacing the original shaft coupling without changing the corresponding structure and the position of a base of the loading equipment of the motor to be measured because the external shape and the installation dimension of the sensor are the same as the original shaft coupling of the motor to be measured.

Description

The coupling type torque sensor

Technical field:

The utility model is used for the online dynamic monitoring of moment of torsion of large and medium-sized motor.

Background technology:

In fields such as oil exploitation, mine excavation, metallurgical machinery, heavy duty equipment manufacturings, many large and medium-sized motors are arranged in operation, the large and medium-sized equipment that large and middle size motor drove usually is continuously the crux equipment of running.Realization is carried out dynamic management, in good time regulation and control with regard to realizing to large and medium-sized equipment to the on-line monitoring of large and medium-sized Motor torque, accomplishes safety in production, energy-saving and cost-reducing effectively.

In the prior art, the sensor that is used for the Motor torque test generally is only limited to micro-machine, electronic sensor wherein by the elastic body of a steel axle shape, be attached to the strain gauge bridge on the elastic body, the output lead composition that gives the treatment circuit of this electric bridge output signal and link to each other with the test result display with change, sensor is installed on the specific device.

Yet, normally adopt shaft coupling to dock between large and medium-sized motor and the load equipment, and mounting base is fixed, spacing is little therebetween, therefore, torsion-testing apparatus is very difficult to be installed, and adds that the volume and the deadweight of large and medium-sized motor and the load equipment that is driven is all very big, and this makes the installation testing device become difficult more.In addition, for trying to achieve bigger bond strength, the shaft coupling of being adorned on the large and medium-sized motor normally adopts interference fit, and the hot jacket assembling also causes the dismounting of shaft coupling very difficult.For above-mentioned reasons, the moment of torsion to large and medium-sized motor detects and can only carry out in laboratory and specialized factory's simulation at present, in the production scene moment of torsion of large and medium-sized motor is carried out on-line monitoring and then also is in blank.

Summary of the invention:

The purpose of this utility model provides a kind of shaft coupling that both can be used as, and can carry out the torque sensor of the coupling type of torsion-testing again, and the online torque monitoring of large and middle size motor can be realized.

Above-mentioned purpose is to be achieved according to such technical scheme: an axle sleeve that matches with motor shaft is set, the steel elastic body of sensor is made the shape of shaft coupling, link with spline between axle sleeve and the elastic body, constitute shaft coupling, on the elastic body face of cylinder, leave annular groove, bottom land is pasted strain gauge bridge, pack in the annular groove signal transmitting treatment circuit plate and transmitter module, the three is communicated with successively with lead, by silica gel sealing in annular groove, only exposes the antenna of transmitter module, on the other elastic body face of cylinder of this annular groove, secondary coil is installed, on the bearing outside shaft coupling primary coil is installed, constitute the moveable core power transformer, the primary coil of this transformer links to each other with external power, powers with the signal transmitting treatment circuit plate that the secondary induction current of going up generation is a sensor.

Shaft coupling on the tested motor shaft is taken off, with hot cover process the axle sleeve interference that has male splines in the utility model is assemblied on the motor shaft, the elastic body that will have the shaft coupling shape of female spline again is contained on this axle sleeve, with shaft coupling of the fastening formation of screw, the shaft coupling on this shaft coupling and the load equipment is linked; Adjust being contained in the secondary coil on the elastic body face of cylinder and being installed in gap between the primary coil on the outer bearing of shaft coupling, bearing is fixed, take out the gap pad, make it to become a workable moveable core power transformer; The primary coil and the external power of this power transformer are connected, and secondary coil promptly produces induction current, is the sensor power supply thus; Start motor, production enters operation, load on the motor makes as the elastic body of shaft coupling and is turned round and produce microdeformation, and deformation takes place the strain gauge bridge that sticks on the elastomeric ring trench bottom thereupon, produces change in resistance, AC signal to signal transmitting treatment circuit plate output variation, handle through this circuit, the outputting standard signal, by transmitter module through its antenna transmission, by receiving trap, promptly obtain the online torque parameter of motor.

The beneficial effect that the utility model had is:

1. sensor is installed in transfer charge on the tested motor output shaft with the form of shaft coupling, and measured result directly, truly; The sensor outline overall and installing dimensions is with identical by the former shaft coupling of measured motor, replace former shaft coupling, needn't be done the change of corresponding structure and base position by the load equipment of measured motor, solve effectively in a difficult problem of producing on the spot to the online dynamic monitoring of large and medium-sized Motor torque.

2. take to form with splined as the shaft coupling of sensor by axle sleeve and elastic body, detachable, both adapted to hot cover process and made shaft coupling and motor shaft interference fit, and obtained big linking intensity, high temperature is to the infringement of electronic component when having avoided again implementing hot cover process; In addition, axle sleeve and elastic body take spline to be slidingly connected, and be both convenient for assembly, is convenient to maintain and replace again.

3. take the moveable core power transformer to provide working power, can realize uninterrupted power supply, satisfy the needs of monitoring normally by the long-term continous-stable of measured motor for sensor.

Description of drawings:

Fig. 1 is the axial cut-open view of the utility model;

Fig. 2 is office of a Fig. 1 II portion enlarged drawing;

Fig. 3 is the block scheme of the utility model circuit.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing.

Referring to Fig. 1, shaft coupling is formed by the elastic body 1 of shaft coupling shape with the axle sleeve 2 of its endoporus of splined, the employing superior alloy steel is made, the profile of elastic body 1 connection part A with its on the size of connection holes with identical by former shaft coupling on the measured motor, the endoporus of axle sleeve 2 and the size of keyway and tolerance satisfy the requirement of tested motor shaft hot cover process, and elastic body 1 satisfies the requirement that is slidingly matched with the spline size and the tolerance of axle sleeve 2.Elastic body 1 and axle sleeve 2 with splined adopt screw 14 fastening.On the elastic body 1 close face of cylinder of connection part A, leave 2 continuous annular grooves, one is little annular groove 3, another is big annular groove 13 (see figure 2)s, strain gauge bridge 4 is made up of 4 sections resistance strain gages, be affixed on big annular groove bottom land in uniform way, constitute measuring bridge, signal transmitting treatment circuit plate 5 and transmitter module 6 place in the big annular groove, strain gauge bridge 4, signal transmitting treatment circuit plate 5, transmitter module 6 connect successively with lead, line is walked in little annular groove, and each part is by silica gel 7 sealing in the annular groove 4, and the antenna of transmitter module passes silica gel and stretches in the air.Be contained on the shaft coupling and form by fixed part and rotating part for the moveable core power transformer of sensor power supply, rotating part has the inner frame 8 of a ring-type, be fixed on the other face of cylinder of elastic body 1 annular groove, secondary coil 9 is embedded on the inner frame 8, and the output terminal of secondary coil is reserved the end of a thread that connects with circuit board 5; Fixed part has one and covers in the outer bearing 10 of shaft coupling, and the outer skeleton 11 similar with the inner frame profile is housed on the bearing 10, and primary coil 12 is embedded on the outer skeleton 11, makes the interface that primary coil input end and external power are connected on the bearing 10.Distance between the number of turn of coil and primary and secondary coil determines that by the design of transformer requirement bearing 10 is fixed on the suitable basis.Referring to Fig. 3, signal transmitting treatment circuit plate 5 is by mu balanced circuit, amplifier circuit, V/F translation circuit and modulation circuit connect to form successively, the secondary access mu balanced circuit of moveable core power transformer, the output lead of strain gauge bridge 4 inserts amplifier circuit, the input end of transmitter module 6 inserts modulation circuit, it is elementary that outer power supply source inserts the moveable core power transformer by lead, process coupling level secondarily induces alternating current, be treated to signal transmitting treatment circuit plate by voltage stabilizing working power is provided, elastic body is turned round the change in resistance signal that strain gauge bridge is produced and is amplified and V/F conversion and modulation treatment through amplifier, become standard signal, carry out power amplification after its antenna is launched through transmitter module.

Claims

1. coupling type torque sensor, has a steel elastic body, be attached to the strain gauge bridge on the elastic body, the signal transmitting treatment circuit plate that the electric bridge output signal is handled, it is characterized in that: described elastic body is the shaft coupling shape, it is with hole and the axle sleeve that matches with motor shaft again constitute shaft coupling within it with splined, have annular groove on the elastomeric face of cylinder, strain gauge bridge is attached to the bottom of annular groove, signal transmitting treatment circuit plate and transmitter module are housed in the annular groove, strain gauge bridge, signal transmitting treatment circuit plate, transmitter module links successively, by the silica gel sealing, on the elastomeric face of cylinder, secondary coil is housed, on the bearing outside shaft coupling primary coil is housed, constitute the moveable core power transformer, have the interface that primary coil and external power link on the bearing, the relevant interface of the output terminal of secondary coil and signal transmitting treatment circuit plate links.

2. according to the coupling type torque sensor of claim 1, it is characterized in that, described signal transmitting treatment circuit plate 5 is connected to form successively by mu balanced circuit, amplifier circuit, V/F translation circuit and modulation circuit, the secondary access mu balanced circuit of moveable core power transformer, the input lead of strain gauge bridge inserts amplifier circuit, and the input end of transmitter module inserts modulation circuit.

3. according to the coupling type torque sensor of claim 1, it is characterized in that be fixed with the inner frame of a ring-type on the elastomeric face of cylinder, secondary coil is contained on the inner frame, on the bearing outside the shaft coupling the outer skeleton similar with the inner frame profile is housed, primary coil is contained on the outer skeleton.

4. according to the coupling type torque sensor of claim 1, it is characterized in that, leave 2 continuous annular grooves on the face of cylinder on the elastic body, strain gauge bridge is affixed on big annular groove bottom land wherein in uniform way, signal transmitting treatment circuit plate and transmitter module are locked in the big annular groove by silica gel, and their on line is locked in wherein the little annular groove by silica gel.