CN2096759U

CN2096759U - Magnetizing apparatus for wheel flaw detection

Info

Publication number: CN2096759U
Application number: CN 91216095
Authority: CN
Inventors: 王雷
Original assignee: Harbin Science & Technology Inst Harbin Railway Bureau
Current assignee: Harbin Science & Technology Inst Harbin Railway Bureau
Priority date: 1991-06-10
Filing date: 1991-06-10
Publication date: 1992-02-19

Abstract

The utility model relates to a magnetizing apparatus for wheel flaw detection which is mainly used for magnetization of the flaw detection of wheels of the locomotive. The magnetizing apparatus for the wheel flaw detection can also be used for the magnetizing apparatus of other equipment. The original magnetizing apparatus only demagnetizes the flaw detection of the sliding bearing wheel which is composed of a kind of material, and the original magnetizing apparatus is difficult to reach to the residual magnetism standard when the wheel pair of a rolling bearing is detected under the condition that the bearing is not withdrawn. The utility model is composed of a main circuit 1, a stabilized direct current power supply 2, a magnetizing converting circuit 3, a phase shifting pulse control circuit 4, a step voltage control circuit 5, and a time and converting control circuit 6. The demagnetization of the utility model can completely reach to the residual magnetism standard after the flaw detection for the wheel pair of the rolling bearing under the condition that the bearing is not withdrawn.

Description

Magnetizing apparatus for wheel flaw detection

Wheel flaw detection magnetising or demagnetising apparatus is mainly used in the flaw detection of railway locomotive wheel and fills demagnetization, also can be used as the magnetising or demagnetising apparatus of other equipment.

It is to set up magnetic field, closed-loop path by the field coil on main yoke to carry out that original Bearing of Railway Locomotive Wheel Set is vertically filled demagnetization to defectoscope.The exciting current that magnetizes is to utilize change silicon controlled phase place to regulate the electric current that magnetizes, oppositely demagnetization is a size of adjusting current-limiting resistance control demagnetization current, therefore, stability is low, and flaw detection demagnetization that can only be right to the sliding bearing wheel that constitutes by a kind of material, to under the situation of not moving back bearing, detecting a flaw, be difficult to reach the remanent magnetism standard for the rolling bearing wheel after the demagnetization.So now still unmatchful rolling bearing wheel is at the demagnetizer that does not move back after just detecting a flaw under the bearing situation.

The utility model provide a kind of to rolling bearing wheel at the demagnetizer that does not move back after just detecting a flaw under the bearing situation, and can also be to combine the demagnetization of filling of original paper by several unlike materials.

The utility model by main circuit 1, D.C. regulated power supply 2, fill demagnetization change-over circuit 3, phase-shift pulse control circuit 4, stepped-up voltage control circuit 5, time and conversion control circuit 6 and form.

Main circuit 1 fills demagnetization circuit by half-controlling bridged rectifier circuit and main yoke and forms.The half-controlling bridged rectifier circuit is by controllable silicon 3CT1,3CT2, diode D ₁, D ₂, D ₃Form.D ₁Be fly-wheel diode, be mainly used in and prevent that controllable silicon is out of control.Main yoke is filled demagnetization circuit and is made up of relay three winding point 3J1,3J2,3J3,4J1,4J2,4J3 and main yoke LB.

D.C. regulated power supply 2 by ± 15V and+24V forms.

Fill demagnetization change-over circuit 3 by integrated circuit (IC) 3, IC4, IC5, IC6, relay 1J, 2J, normal opened contact 5J2,1J2,2J2,5J1, capacitor C15～C24, resistance R 22～R24, R26～R29, R31～R33, diode D5～D8, controllable silicon 3CT3,3CT4 form.

Phase-shift pulse control circuit 4 is made up of pulse modulated circuit 4-1, phase-shift pulse output circuit 4-2, pulse voltage amplifying circuit 4-3, pulse spacing output circuit 4-4.Pulse modulated circuit 4-1 is by integrated circuit (IC) 1, resistance R 1, R2, and diode D11, capacitor C 1, C2 form.Phase-shift pulse output circuit 4-2 is by integrated circuit (IC) 2, resistance R 3～R9, R11～R13, capacitor C 3, C4, C6, relay tip 1J ₃, 2J ₃, 5J ₁Form.Pulse voltage amplifying circuit 4-3 is by triode T5, T6, diode D33, D34, D40, D41, and resistance R 14～R17, capacitor C 36, C36, C37 form.Pulse spacing output circuit 4-4 is by transformer TB3, TB4, diode D16, D17, and voltage stabilizing diode CW1 forms.B, d, c, e point are electrically connected with b, d, c, e point in the main circuit 1 respectively.The a point is electrically connected with a point in the stepped-up voltage control circuit 5.

Stepped-up voltage control circuit 5 is by integrated circuit (IC) 10, adjustable resistance R46～R54, every road output isolating diode D24～D32, output ladder selector switch K1-1～K1-4, K2-1～K2-3, output isolating diode D20～D23, resistance R 42～R45, triode T3, T4, capacitor C 30, relay 6J forms.F, G point is electrically connected with F, G point in time and the conversion control circuit 6 respectively, and a point is electrically connected with a point in the phase-shift pulse control circuit 4.

Time and conversion control circuit 6 be by integrated circuit (IC) 7, IC8, IC9, triode T1, T2, and relay 5J, resistance R 34～R41, R55, capacitor C 25～C29, C38, diode D18 forms.F, G point is electrically connected with F, G point in the stepped-up voltage control circuit 5 respectively.

This programme can be used as an embodiment of this utility model.

Good effect of the present utility model: adopt the utility model to the rolling bearing wheel to the demagnetization after flaw detection under the situation of not moving back bearing, can reach the remanent magnetism standard after the flaw detection fully, remanent magnetism can reach below 5 Gausses.Demagnetization after the utility model can also be used for the element of other composite structure type detected a flaw.The utility model also can be used for the various demagnetizing apparatuses that fill by suitable interface circuit.

Description of drawings:

Fig. 1 is a whole block scheme of the present utility model;

Fig. 2 is the circuit structure diagram of main circuit 1;

Fig. 3 is the structural drawing that fills demagnetization change-over circuit 3;

Fig. 4 is the structural drawing of phase-shift pulse control circuit 4;

Fig. 5 is the structural drawing of stepped-up voltage control circuit 5;

Fig. 5 is the structural drawing of time and conversion control circuit 6.

When the work of this device, at first provide ± 15V by power supply ,+24V D.C. regulated power supply, ± 15V are given IC1～IC10 power supply, and+24V partly powers for 1J～6J relay tip.Pulse signal by IC7 generation fixed frequency produces comparatively precise time pulse through the IC8 frequency division then, gives IC9 and IC10 respectively, and IC9 and IC10 obtain pulse signal simultaneously, change its duty.IC9 changes to be picked up 5J behind the output state or falls control IC3, IC4 work or IC5, IC6 work.IC3, IC4 work when 5J falls, IC3 exports fixed frequency pulse, and output control 1J picks up behind the IC4 frequency division, makes the 3J action to the greatest extent, the conducting of control main yoke LB forward magnetic circuit.In like manner, IC5, IC6 work when 5J picks up makes the 4J action, control main yoke LB commutation.

And, becoming the required phase shift offset voltage in every road by the modulation of phase-shift pulse control circuit by each road voltage signal that IC10 sends, these offset voltages pass through 5J again ₁, 1J ₃, 2J ₃Give phase-shifting voltages and comprehensively relatively amplify, give pulsed modulation then and partly carry out the spike train modulation, send IC2 again back at 9 ends.The pulse that 5,15 ends of IC2 are sent is partly amplified through the pulse voltage amplification, gives main circuit through the output of pulse isolated part again and triggers the controllable silicon conducting.

Along with the pulse that IC8 sends here at every turn, constantly change the output sequence of IC10, until end-of-job, control 6J picks up, and the The whole control course of work finishes.

Claims

1, a kind of wheel flaw detection magnetising or demagnetising apparatus is mainly used in the flaw detection of railway locomotive wheel and fills demagnetization, also can be used as the magnetising or demagnetising apparatus of other equipment, it by main circuit 1, D.C. regulated power supply 2, fill demagnetization change-over circuit 3, phase-shift pulse control circuit 4, stepped-up voltage control circuit 5, time and conversion control circuit 6 and form, it is characterized in that:

(1), main circuit 1 fills demagnetization circuit by half-controlling bridged rectifier circuit and main yoke and forms, the half-controlling bridged rectifier circuit is by controllable silicon 3CT ₁, 3CT ₂, diode D ₁, D ₂, D ₃Form, main yoke is filled demagnetization circuit by relay three winding point 3J ₁, 3J ₂, 3J ₃, 4J ₁, 4J ₂, 4J ₃Form with main yoke LB;

(2), fill demagnetization change-over circuit 3 by integrated circuit (IC) ₃, IC ₄, IC ₄, IC ₆, relay 1J, 2J, normal opened contact 5J ₂, 1J ₂, 2J ₂, 5J ₁, capacitor C15～C24, resistance R 22～R24, R26～R29, R31～R33, diode D5～D8, controllable silicon 3CT3,3CT4 form;

(3), phase-shift pulse control circuit 4 is made up of pulse modulated circuit 4-1, phase-shift pulse output circuit 4-2, pulse voltage amplifying circuit 4-3, pulse spacing output circuit 4-4; Pulse modulated circuit 4-1 is by integrated circuit (IC) ₁, resistance R 1, R2, diode D11, capacitor C 1, C2 are formed, and phase-shift pulse output circuit 4-2 is by integrated circuit (IC) 2, resistance R 3～R9, R11～R13, capacitor C 3, C4, C6, relay tip 1J ₃, 2J ₃, 5J ₁Form; Pulse voltage amplifying circuit 4-3 is by triode T5, T6, diode D33, D34, D40, D41, and resistance R 14～R17, capacitor C 36, C37 form; The pulse spacing output circuit is by transformer TB3, TB4, diode D16, D17, and voltage stabilizing diode CW1 forms; B, d, c, E point are electrically connected with b, d, c, E point in the main circuit 1 respectively, and a point is electrically connected with a point in the stepped-up voltage control circuit 5;

(4), stepped-up voltage control circuit 5 is by integrated circuit (IC) 10, adjustable resistance R46～R54, every road output isolating diode D24～D32, output ladder selector switch K1-1～K1-4, K2-1～K2-3, output isolating diode D20～D23, resistance R 42～R45, triode T3, T4, capacitor C 30, relay 6J forms; F, G point is electrically connected with F, G point in time and the conversion control circuit 6 respectively;

(5), time and conversion control circuit 6 be by integrated circuit (IC) 7, IC8, IC9, triode T1, T2, relay 5J, resistance R 34～R41, R55, capacitor C 25～C29, C38, diode D18 forms.