CN201063050Y - Apparatus for measuring wiping of charged friction pair - Google Patents

Abstract

The utility model provides a micro-wearing measuring device of an electrified friction pair, consisting of a cantilever beam arm, a lever loading system, an electrified friction mechanism and a detecting output mechanism. An upper end of the cantilever beam arm is fixed on a machine frame through an axis pin and a working surface at a lower part of the cantilever beam arm is provided with a component that is to be worn; the lever loading system consists of a balancing pole, a clump weight and a set of counterweights; a counter wearing component, a contactor, an ampere meter, an adjustable resistor, a DC stabilized power supply are connected in series in sequence to form the electrified friction mechanism; the electrified friction mechanism forms a current loop with the component to be worn through a lead; the detecting output mechanism comprises a displacement transducer and a computer. The utility model adopts technology that is controlled and processed by a computer, thereby eliminating man-made interference, improving detecting precision and efficiency; besides, the utility model has simple structure and convenient operation, and is widely applicable to the field of measuring under microelectric circumstance for micro-wearing amount of friction pairs, such as assessing the wearing resistant performance of electric brush materials, wearing performance of electric sliding contact of commutator materials, etc.

Description

A kind of wiping measurement mechanism of charged friction pair

Technical field

The utility model relates to a kind of checkout equipment, is specifically related to a kind of device that friction pair wiping amount in the charged environment is detected.

Background technology

On engineering to doing relative motion and existing the parts of mutual rubbing wear to be referred to as friction pair.Should adopt the method for systematic analysis to study to the friction pair two element, so that solve a series of phenomenons that taken place between friction pair.As direct current micromotor, adopt the sliding contact of commutator and brush, the realization electric power transfer is kept motor rotation, belong to during commutator work and be subjected to light current slip electric contact state, its working current is usually less than 1A, and the electric sliding contact polishing machine of commutator and brush material is to the stability of motor and very important influence is arranged serviceable life.Have only when brush and the good sliding contact of commutator maintenance, could guarantee the normal operation of motor; And this sliding contact meeting causes the wearing and tearing of brush and commutator, so brush and commutator are a pair of friction pairs.When may wear to accidents such as to a certain degree will causing short circuit or deadlock, friction pair takes place.So commutator material and the brush material anti-wear performance under electric sliding contact condition is to the stability of motor and very important influence is arranged serviceable life.Be subjected to light current slip electric contact state and belong to during the work of commutator and brush, but at present to the friction pair wiping phenomenon research that slided by light current to electrically contact seldom, the instrument and equipment that is used to measure wear extent then still less.

The utility model content

At the prior art above shortcomings, the purpose of this utility model provides a kind of under the light current operating mode, the device that the wear extent of friction member is measured.

The purpose of this utility model is achieved in that a kind of charged friction pair wiping measurement mechanism, it is characterized in that being made up of overarm arm, bar thick stick loading system, charged friction mechanism and detection output mechanism;

The upper end of overarm arm is fixed on the frame by bearing pin, installs on the workplace of its underpart by the mill part, is ground part and is fixed on the side of overarm arm bottom with the insulation compressing tablet, is ground between part and the overarm arm to be provided with insulcrete;

Bar thick stick loading system is made up of balance stem, balancing weight and counterweight, the fixedly connected balancing weight of balance stem one end, other end suspention counterweight; The overarm arm is movably connected on the middle part of balance stem by bearing pin;

Charged friction mechanism is by being connected in series successively to mill part, contact, reometer, adjustable resistance and D.C. regulated power supply, and charged friction mechanism constitutes current return by lead and quilt mill part; To the mill part is cylindrical structure, and laterally is located at the overarm arm and is fixed with by a side of mill part, to the mill part by initiatively insulation axle and driven insulation axle from axially fixing, initiatively insulating spool is connected with motor by torsionspring.The face of cylinder to the mill part is contacted with grinding part, and its side contacts with contact;

Detect output mechanism and comprise displacement transducer, signal processing system and computing machine, displacement transducer is connected to computing machine by voltage amplifier, low-pass filter, A/D converter and single-chip microcomputer;

Detect output mechanism and be located at a side of overarm arm, and with relative by the mill part.

The utility model is applicable to the measurement of rubbing contact part wiping amount under the light current operating mode.Adopt computer control, treatment technology, thereby reduced the interference of human factor, improved the precision and the speed that detect; The utility model is simple in structure, easy to operate in addition, the electric sliding contact polishing machine evaluation etc. that can be widely used in brush material anti-wear performance evaluation, commutator material under the light current environment, the field that the wiping amount of friction pair is measured.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the side view of Fig. 1.

Among the figure, 1-counterweight, 2-balance stem, 3-bearing pin, 4-balancing weight, 5-are ground part, 18-insulcrete, 19-insulation compressing tablet, 20-overarm arm, 21-motor, 22-torsionspring, 23-initiatively insulate axle, the driven insulation of 24-spool to mill part, 6-contact, 7-lead, 8-reometer, 9-adjustable resistance, 10-D.C. regulated power supply, 11-displacement transducer, 12-voltage amplifier, 13-low-pass filter, 14-A/D converter, 15-single-chip microcomputer, 16-computing machine, 17-.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 1 and Fig. 2, the charged friction pair wiping measurement mechanism that the utility model relates to is made up of overarm arm 20, bar thick stick loading system, charged friction mechanism and detection output mechanism.

The upper end of overarm arm 20 is fixed on the frame (omitting among the figure) by bearing pin 3, install on the workplace of its underpart by mill part 17, be fixed on a side of overarm arm 20 bottoms by mill part 17 by insulation compressing tablet 19 and insulcrete 18, grind part 17 and hanging oneself from a beam has insulcrete 18 between the arm 20.

Bar thick stick loading system is made up of balance stem 2, balancing weight 4 and counterweight 1, the fixedly connected balancing weight 4 of balance stem 2 one ends, and other end suspention counterweight 1, overarm arm 20 is movably connected on the middle part of balance stem 2 by bearing pin 3; The effect of bar thick stick loading system is to apply certain load to mill part 5 with between by mill part 17.

Charged friction mechanism is by being connected in series successively to mill part 5, contact 6, reometer 8, adjustable resistance 9 and D.C. regulated power supply 10, and charged friction mechanism constitutes current return by lead 7 and quilt mill part 17; To mill part 5 is cylindrical structure, and laterally be located at overarm arm 20 bottoms and be fixed with by a side of mill part 17, it is axially fixing and by the main drive shaft driven rotary by insulation axle 23 initiatively and driven insulation axle 24, and initiatively insulation spools 23 is connected with motor 21 by torsionspring 22; Driven insulation axle 24 plays the auxiliary positioning effect; The face of cylinder to mill part 5 is contacted with grinding part 17, and the side of grinding part 5 is contacted with contact 6.

Detect output mechanism and comprise displacement transducer 11, signal processing system and computing machine 16, displacement transducer 11 is connected to computing machine 16 by voltage amplifier 12, low-pass filter 13, A/D converter 14 and single-chip microcomputer 15.Detect output mechanism and be located at the opposite side of overarm arm 20, and with relative by mill part 17.

When the friction pair wiping of commutator and brush formation is measured, generally adopted brush materials by mill part 17, mill part 5 is adopted commutator materials.After will installing by mill part 17 with to mill part 5, open D.C. regulated power supply 10, can form a weak electric field in the friction pair both sides, starting motor 21 then, can be with the wearing and tearing of friction pair element under the light current state.In the wear process, displacement transducer 11 with the change in depth situation (being variable signal) of detected wearing and tearing through voltage amplifier 12 amplify and low-pass filter 13 filtering after, by A/D converter 14 and single-chip microcomputer 15 data of the polishing scratch degree of depth are imported in the computing machine 16, thereby obtained sample surfaces polishing scratch degree of depth dynamic changing data in time.

After the off-test, computing machine is according to polishing scratch width and the polishing scratch length measured, substitution wear volume computing formula:

Wear volume $V=[\frac{{\mathrm{\πR}}^2}{180}\·\arcsin \left(\frac{b}{2R}\right)-\frac{b}{2}\sqrt{R^2-{\left(\frac{b}{2}\right)}^2}]\·L$

Wherein: b is the polishing scratch width; L is a polishing scratch length; R is the radius to the mill part.

The density of material can be asked its wear extent per sample then.

In addition, can change the size that rubbing contact part both end voltage is fallen, thereby reach the purpose of regulating strength of current by the resistance of regulating adjustable resistance 9.

The utility model is applicable to the measurement of rubbing contact part wiping amount under the light current operating mode, to install by the mill part with to the mill part during measurement, open D.C. regulated power supply, form a weak electric field in the friction pair both sides, actuating motor can carry out the wear measurement of the friction member under the charged operating mode then.

Claims (1)

1. a charged friction pair wiping measurement mechanism is characterized in that being made up of overarm arm, bar thick stick loading system, charged friction mechanism and detection output mechanism;

The upper end of overarm arm (20) is fixed on the frame by bearing pin (3), install on the workplace of its underpart by mill part (17), be fixed on insulation compressing tablet (19) on the side of overarm arm (20) bottom by mill part (17), quilt is ground between part (17) and the overarm arm (20) is provided with insulcrete (18);

Bar thick stick loading system is made up of balance stem (2), balancing weight (4) and counterweight (1), the balance stem fixedly connected balancing weights of (2) one ends (4), other end suspention counterweight (1); Overarm arm (20) is movably connected on the middle part of balance stem (2) by bearing pin (3);

Charged friction mechanism is by being connected in series successively to mill part (5), contact (6), reometer (8), adjustable resistance (9) and D.C. regulated power supply (10), and charged friction mechanism constitutes current return by lead (7) and quilt mill part (17); To mill part (5) is cylindrical structure, and laterally be located at the overarm arm (20) be fixed with by the mill part (17) a side, by initiatively insulation axle (23) and driven insulation axle (24) is from axially fixing, initiatively insulation axle (23) is connected with motor (21) by torsionspring (22) to mill part (5); The face of cylinder to mill part (5) is contacted with grinding part (17), and the side of grinding part (5) is contacted with contact;

Detect output mechanism and comprise displacement transducer (11) and computing machine (16), displacement transducer (11) is connected to computing machine (16) by voltage amplifier (12), low-pass filter (13), A/D converter (14) and single-chip microcomputer (15);

Detect output mechanism and be located at a side of overarm arm (20), and with relative by mill part (17).

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