CN2190832Y

CN2190832Y - Motor scanning and monitoring protector

Info

Publication number: CN2190832Y
Application number: CN 94211970
Authority: CN
Inventors: 靳新会
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-06
Filing date: 1994-05-06
Publication date: 1995-03-01
Anticipated expiration: 2004-05-06

Abstract

The utility model relates to a motor scanning and monitoring protector which is composed of a monitor, a metal contact head, a bakelite base, etc., wherein, the metal contact head and the bakelite base are respectively installed on end caps at both ends of a motor, a fixed preset gap is arranged between the metal contact heat and the rotary shaft of the motor by the adjustment, when the bearing of the motor is worn or damaged to the definite DEG, the rotary shaft of the motor can contact with the metal contact head so as to produce the signal, then, an accident indicating lamp can be lighted, and the utility model can cut off the power supply of the motor.

Description

Motor scanning and monitoring protector

The utility model relates to a kind of electric motor protective device.

Motor uses very general in industrial and agricultural production; expense is also increasing; employed motors of department such as mine, cement, chemical industry particularly wherein; because ambient air is polluted and dustiness is big; cause the motor premature wear easily and burn; and in the motor that burns with the number in the majority that wearing and tearing and damage were caused of motor bearings; account for 90% greatly; but existing protector generally can only play the protective effect of aspects such as the phase failure, phase shortage, overload, and can not play monitoring and protective effect to bearing wear or damage.

The purpose of this utility model is to provide a kind of motor to sweep the thorax monitoring protector at above-mentioned the deficiencies in the prior art part, so that in time find the excessive problem of motor bearings wearing and tearing, exempts the burn-down of electric motor heavy losses that cause therefrom.

The purpose of this utility model can reach by following measure: motor is swept the thorax monitoring protector; form by watch-dog, metal contact, bakelite base etc.; metal contact is installed on the bakelite base; the bakelite base then is installed on the electric motor end cap, adjusts and fix a default gap between metal contact and machine shaft.After motor bearings wearing and tearing, rotor will be with before stator soon contact, and rotating shaft contacts with metal contact is first, thus to signal of watch-dog, the power supply of watch-dog cut-out motor, thus avoid motor to sweep the thorax accident.Watch-dog is made up of institutes such as transformer, rectifier diode, capacitor, indicator light, voltmeter, triode, relay, semifixed resistor and binding posts, wherein pair of terminals joins with end cap and two metal contact at motor two ends respectively, and other has pair of terminals to join with A.C. contactor.

The drawing of accompanying drawing is described as follows:

Fig. 1 sweeps the watch-dog outline drawing of thorax monitoring protector for the utility model motor;

Fig. 2 sweeps the watch-dog back view of thorax monitoring protector for the utility model motor;

Fig. 3 sweeps the metal contact of the watch-dog of thorax monitoring protector for the utility model motor;

Fig. 4 sweeps the bakelite base of the watch-dog of thorax monitoring protector for the utility model motor;

Fig. 5 is an electric motor end cap;

Fig. 6 is that metal contact and bakelite base are installed in the schematic diagram on the electric motor end cap;

Fig. 7 is the electric appliance circuits schematic diagram.

The utility model is described further below in conjunction with drawings and Examples:

See also Fig. 1---6; motor of the present utility model is swept the thorax monitoring protector and mainly is made up of watch-dog 1, metal contact 2 and bakelite base 3; wherein wiring board is equipped with in watch-dog 1 inside; power supply indicator 101, malfunction indicator lamp 102, mains switch 103 and voltmeter 104 are installed on the panel of watch-dog 1, and terminal block 105 is equipped with at the back of watch-dog 1.

See also Fig. 3, it is 1 that metal contact 2 adopts thickness---the brass (or red copper) of 3mm is made, its core is that a width is the dead slot 201 of 4mm, top is contact end 202, its width is about 6mm, contact end 202 is about 8mm apart from dead slot 201 tops and the length of dead slot 201 considers that the requirement of position adjustment is approximately about 20mm, and metal contact 2 bottoms 203 are slightly wideer than contact end 202.

See also Fig. 4, bakelite base 3 employing thickness are that the bakelite about 10mm is made, and have hole 301 its diameters of two symmetries to be approximately φ 6.5mm in its vertical center line both sides, and the M4 screw 302 of two about 10mm of phase mutual edge distance is arranged on vertical center line.

See also Fig. 5, before being installed on the electric motor end cap 4, process the screw 401 of M6 earlier at the suitable position of electric motor end cap 4 to metal contact 2 and bakelite base 3.

See also Fig. 6, when being installed to metal contact 2 and bakelite base 3 on the electric motor end cap 4, the M6 screw 403 with two suitable lengths is tightened in bakelite base 3 on the electric motor end cap 4 earlier, stop washer is housed below M6 screw 403 becomes flexible preventing.When metal contact 2 is installed, M4 screw 402 with two suitable lengths is contained in metal contact 2 on the bakelite base 3 earlier, but do not tighten earlier, carry out the gap adjustment, with a J02-92-6, the motor of 75KW is an example, and motor gas-gap length is 0.625mm, two metal contact 2 and two bakelite bases 3 are installed in respectively on two end caps of motor, the gap of metal contact 2 with motor shaft are adjusted into:

(total air gap ÷ 2 of motor)-(0.08～0.1)=0.212～0.232mm

After the gap adjustment finishes, two M4 screws 402 are fastened with stop washer pin.

See also Fig. 7, motor of the present utility model is swept in the electric appliance circuits of thorax monitoring protector and is comprised: transformer, rectifier diode, capacitor, indicator light, voltmeter, triode, relay, semifixed resistor and binding post.By the power supply of 380V power supply, through the transformer step-down, diode and capacitor filtering produce a stable operating voltage (when receiving the signal of metal contact 2) and touch the power supply that the triode conducting makes the actuating of relay and cuts off contactor.Binding post among the figure: a, b succeed electrical equipment normally-closed contact, c, d connects motor housing and metal contact 2 respectively, and (line that can take to meet c is connected on below the screw 403, and the line that meets d is connected on below the screw 402, because front and rear cover all needs wiring, so c all can respectively connect two lines on the d terminal.) e, f connects the power line of motor.

In sum; electric machine chamber-sweeping monitoring protector of the present utility model has cheap; simple in structure; easy for installation; practical advantage; use electronic component to control organically with machinery and be combined, and can be complementary with various electric motor protective devices, further improve the defencive function to motor; especially to large and middle size motor; the power inequality, imbalance, dust is many (such as ball mill; disintegrating machine etc.) more practical and essential; for this difficult problem of burn-down of electric motor is solved, thereby the motor gas-gap monitoring and protection there has been a fairly perfect way, also the from now on production of motor has been improved and play certain positive progradation.

Claims

1, a kind of motor is swept the thorax monitoring protector; comprise: watch-dog, metal contact, bakelite base etc.; it is characterized in that: described metal contact is installed on the bakelite base; the bakelite base then is installed on the electric motor end cap, adjusts and fix a default gap between metal contact and machine shaft.

2, motor according to claim 1 is swept the thorax monitoring protector; it is characterized in that: described watch-dog is made up of institutes such as transformer, rectifier diode, capacitor, indicator light, voltmeter, triode, relay, semifixed resistor and binding posts; wherein pair of terminals joins with the end cap and the metal contact at motor two ends respectively, and other has pair of terminals to join with A.C. contactor.