CN2160112Y

CN2160112Y - Measuring instrument for piston ring tangential elasticity

Info

Publication number: CN2160112Y
Application number: CN 93233405
Authority: CN
Inventors: 承汉忠; 皮百勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-06
Filing date: 1993-03-06
Publication date: 1994-03-30
Anticipated expiration: 2003-03-06

Abstract

The utility model relates to measuring instrument for piston ring tangential elasticity, composed of a machine body, a sensor, a display board, a force application device, a steel strip, a reversing pin, a positioning device, an electronic circuit box, etc. Force is applied on the steel strip coating the outer circumference of a piston ring through the force application device to cause a resistance-typed induction slice on the sensor which is connected with the steel strip to strain. Through the magnifying processing and analogue to digital conversion of signals send out by the sensor, a display displays pulling force born by the steel strip so as to visually display tangential elasticity born by the position ring consequently. The utility model has the advantages of simple structure, reliable performance, accurate analogue to digital conversion, and convenient operation. The utility model is suitable for measuring the tangential elasticity of piston rings of various types.

Description

Measuring instrument for piston ring tangential elasticity

The utility model relates to a kind of elastic force analyzer, and refering in particular to is a kind of piston ring tangential elastic force analyzer.

The existing piston ring cutting is to the elastic force analyzer, be to adopt the cross-shaped outer garden of piston ring that is wrapped in of flexible steel band on week, the other end of steel band is connected with tooth bar and spring in turn, tooth bar is meshed with the gear of indicating value instrument, when steel band is applied a pulling force, piston ring shrinks because of being stressed, and at this moment, tooth bar moves with steel band, the driven gear rotation, thereby on the indicating value instrument, demonstrate value of thrust, this is piston ring tangential elastic force value, this instrument is owing to structural reason, it is big in use to exist measuring error, and has reading error, and the instrument volume is big, the end-gaps of piston ring is wayward, problems such as measurement result varies with each individual, and operation is inconvenient, and efficient is low.

The purpose of this utility model is to overcome the deficiency of prior art and provides a kind of simple in structure, and is easy to operate, the piston ring tangential elastic force analyzer that measuring accuracy is high.

The utility model is to adopt following proposal to realize: the flexible steel band that the balanced bridge that utilizes an end and resistance strain plate to form links to each other is wrapped in the outer garden of piston ring on week, by being provided with the remain silent force application apparatus of width control device of piston ring, steel band is imposed pulling force, resistance strain plate produces strain because of stressed, destroyed the balance of electric bridge, thereby export a voltage signal, this signal is through amplification, analog to digital conversion and then promote LCD, on LCDs, demonstrate value of thrust, also be piston ring tangential elastic force value.

Concrete structure of the present utility model describes in detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is the utility model front view.

Accompanying drawing 2 is the utility model vertical view.

Accompanying drawing 3 is the utility model electricity functional-block diagram.

Accompanying

drawing

4,5,6,7 is the utility model schematic diagram.

Referring to accompanying

drawing

1,2 the utility model are by body 1, sensor 2, display board 3, force application apparatus 4, steel band 5,

commutation pin

6,7, locating device 8, battery case 9, electronic circuit box 10 is formed, described body 1 is a rectangular parallelepiped, be provided with a LCD panel 3 in its positive end, be provided with sensor 2 in an one side, the null-type bridge circuit that sensor 2 is made up of four resistance strain plates 13, be provided with two commutation pins 6 that make steel band 5 change direction at the positive middle part of

body

1,7, simultaneously, also be provided with a force application apparatus 4 and locating device 8 in the front of body 1, force application apparatus 4 is by reinforcing dish 14, force application rod 15 is formed, locating device 8 is by gathering sill 16, backstay 17, fine setting turn-knob 18 is formed, afterburning dish 14, force application rod 15 all are sleeved on the axle 19 of being located at body 1 front and can be around axle 19 rotations, and force application rod 15 is by being located at the thin nail in two location and afterburning dish 14 location mutually in the T type groove on the afterburning dish 14, gathering sill 16 is packed in the positive of body 1 and is in the downside of afterburning dish 14, backstay 17 is located with gathering sill 16 mutually by the dog screw 20 that is installed in the gathering sill 16, and fine setting turn-knob 18 spinnings also are equipped with battery case 9 in the inside of body 1 on backstay 17, electronic circuit box 10, steel band 5 one ends are connected on the sensor 2, and the other end links to each other with reinforcing dish 14, and two commutation pins 6 are walked around in the centre, 7 and wrap outer garden week of piston ring 11.

Referring to accompanying

drawing

3,4,5,6,7, electronic circuit box 10 is by high precision operating amplifier 21 in the utility model, low-pass filter 22, integrator 23, zero-crossing comparator 24, power supply 25, source of stable pressure 26, logic switch and rest-set flip-flop 27, digital counter 28, central processing unit 29, display driver 30 is formed, the input end of described high precision operating amplifier 21 is connected with the analog input end of sensor 2, output terminal links to each other with the output terminal of low-pass filter 22, the output terminal of low-pass filter 22 links to each other with logic switch and rest-set flip-flop 27, power supply 25 is connected with source of stable pressure 26, low-pass filter 22 is connected with integrator 23 by logic switch and rest-set flip-flop 27 with source of stable pressure 26, integrator 23 is connected with logic switch and rest-set flip-flop 27 by zero-crossing comparator 24, central processing unit 29, counter 28 all is connected with logic switch and rest-set flip-flop 27, the output of logic switch and rest-set flip-flop 27 is connected with central processing unit 29 by counter 28 again, and the input end of display driver 30 is connected with the output terminal of central processing unit 29.

The utility model electronic circuit part principle of work is sketched in following:

1. by central processing unit (8031), (74LS373) and program storage (2764), (8155) form the single-chip microcomputer elementary cell, energized, single-chip microcomputer automatically resets, start working procedure, send the 50HZ square wave by 8155 and give rest-set flip-flop U4:A, U4:B(4011), the crystal oscillator of 8MHZ becomes the 5KHZ pulse to use for rest-set flip-flop U4 by the 74LS393 frequency division, this pulse remaining part behind knife switch is delivered to 8031 center processors by the 74LS393 counting and is handled, and delivers to display driver (UPD7225) then and drives liquid crystal display.

2.U4:A with U4:B be 4066 Sheffer stroke gates, constitute rest-set flip-flop by it, the C signal is the 50HZ square wave that central processing unit 8155 sends, when C is high level, U4:A one end is a low level, by rest-set flip-flop control U3:B, U3:D(electronic switch 4066) conducting, the power supply place obtains normal voltage, by the U2:A(TL08 operational amplifier) carry out reverse integral, when reverse integral to zero the time, U2:B and U2:D(zero passage are than device) produce low level signal, this signal is delivered to U5:B(74LS00 and non-through rest-set flip-flop) 5 pin as signal strobe.

The count pulse of the 5KHZ that 3.A signal is a central processing unit (74LS393) to be sent, it is through U5:A(74LS00 and non-) swing to 4 pin to U5:B, when signal strobe is opened,, U5:C(74LS00) send CPU(8031 back to by U5:A) counting.

4. because of being added with the 12V direct current on the sensor bridge circuit, when sensor is stressed, destroyed the balance of bridge circuit, the bridge circuit output voltage signal and through OP1(OP07) high precision operating amplifier) amplify, the U2:C(TL084 operational amplifier), after filtering and electric current amplify, deliver to rest-set flip-flop, when the suffered pulling force of bridge circuit changes, integral voltage also changes, and the gate width that is formed by zero-crossing comparator also changes, thereby changes the umber of pulse by gate, central processing unit just can accurately reflect the variation of pulling force, and shows on LCDs.

5.RL, RT1, RT2 constitute sampling Adjustment System at zero point, goes into end because of it from mould and adjust, thereby setting range is wide, the precision height, R5A and R5 constitute the range ability adjustment, because of being the duplex adjustment, so temperature coefficient is little, the accuracy height, single-pole double-throw switch (SPDT) K0 is in order to switch the AC and DC power supply.

When using the utility model, only tested piston ring need be placed on the

body

1 and 5 its outer garden weeks of parcel of steel band, adjust the position of force application rod 17, when it is contacted with fine setting turn-knob 18, the A/F of piston ring just in time is a normal width, at this moment, by sensor sensing to the numerical value that after the electronic circuit section processes, on LCDs, shows of information be the tangential elastic force of this piston ring.

In sum, the utlity model has simple in structure, dependable performance, operation, easy to adjust, numerical value conversion accurately, advantage such as data presentation is directly perceived is suitable for that various model piston rings are carried out tangential elastic force and measures.

Claims

A kind of piston ring tangential elastic force analyzer, comprise body 1, sensor 2, display board 3, execute nine devices 4, steel band 5, commutation pin 6,7, locating device 8, battery case 9, electronic circuit box 10, it is characterized in that body 1 is a rectangular parallelepiped, be provided with a LCD panel 3 in its positive end, be provided with sensor 2 in an one side, the null-type bridge circuit that sensor 2 is made up of four resistance strain plates 13, be provided with two commutation pins 6 that make steel band 5 change direction at the positive middle part of body 1,7, simultaneously, also be provided with a force application apparatus 4 and locating device 8 in the front of body 1, force application apparatus 4 is by reinforcing dish 14, execute and do bar 15 compositions, locating device 8 is by gathering sill 16, backstay 17, fine setting turn-knob 18 is formed, afterburning dish 14, force application rod 15 all is sleeved on the axle 19 of being located at body 1 front and can rotates around axle 19, force application rod 15 is by being located at the thin nail in two location and afterburning dish 14 location mutually in the T type groove on the afterburning dish 14, gathering sill 16 is packed in the positive of body 1 and is in the downside of afterburning dish 14, backstay 17 is located with gathering sill 16 mutually by the dog screw 20 that is installed in the gathering sill 16, fine setting turn-knob 18 spinnings are on backstay 17, inside at body 1 also is equipped with battery case 9, electronic circuit box 10, steel band 5 one ends are connected on the sensor, the other end links to each other with reinforcing dish 14, two commutation pins 6 are walked around in the centre, 7 and wrap outer garden week of piston ring 11, electronic circuit box 10 is by high precision operating amplifier 21, low-pass filter 22, integrator 23, zero-crossing comparator 24, power supply 25, source of stable pressure 26 logic switches and rest-set flip-flop 27, digital counter 28, central processing unit 29, display driver 30 is formed, the input end of described high precision operating amplifier 21 is connected with the analog input end of sensor 2, output terminal is connected with the input end of low-pass filter 22, the output terminal of low-pass filter 22 links to each other with logic switch and RS energy generator 27, power supply 25 is connected with integrator 23 by logic switch and rest-set flip-flop 27 with source of stable pressure 26, integrator 23 is connected with logic switch and rest-set flip-flop 27 by zero-crossing comparator 24, central processing unit 29, counter 28 all is connected with logic switch and rest-set flip-flop 27, the output of logic switch and rest-set flip-flop 27 is connected with central processing unit 29 by counter 28 again, and the input end of display driver 30 is connected with the output terminal of central processing unit 29.