Dongguan 2016 Shijie Electrician Certificate Agency Review

The tight fit usually uses the press-in method to press the inner ring of the bearing and the journal together so that the inner ring of the bearing can rotate with the shaft when the motor is running. Therefore, disassembling motor bearings is a troublesome task. Commonly used bearing disassembly methods are as follows. Use a special puller to disassemble the bearing. When disassembling the bearing with a special puller, place the foot of the puller on the inner ring of the bearing and not on the outer ring to prevent the bearing from being damaged. The apex of the screw of the puller should be aligned with the center of the rotating shaft. The puller should be kept parallel to the rotating shaft. When turning the handle, the force should be even and the rotation should be slow to prevent the bearing from being damaged by pulling too fast

Contact person: Li Teacher
Consultation phone number:
<> <>
School name
: Dongguan Guangyou Vocational Training School
<>
Address
: Third floor of Dongguan Bus Terminal East Station (Guangyou Education)
Guangyou Vocational School opens classes all year round
Learn electrician and deliver electrician exam practice software
Guangyou Education
Training goals
: Starting from zero foundation, we will guide students in an all-round way on how to connect indoor and outdoor wires, emergency first aid and treatment of electrician field operations and safe operations, on-the-job operations and employment experience exercises
Specific electrician training course introduction:
/> Introduction to junior electrician training courses:
Safe operation of electricians
.
Basic knowledge of electrical circuits
.
Calculation of circuits
.
Series, parallel connection and application of resistors
.
Alternating current, direct current
.
Single-phase alternating current, three-phase alternating current
.
Transformers, mutual inductors
/> .
Single-phase electricity meter, three-phase electricity meter
.
Motor
.
Use of electrical instruments
.
Multimeter
.
Megohmmeter
.
Current clamp meter
.
Ammeter
.
Voltmeter
.
Applications of low-voltage electrical appliances
.
Fuses
.
Knife switches
.
Circuit breakers
.
Contacts Device
.
Thermal relay
.
Intermediate relay
.
Time relay
.
Button
.< br/>Lighting circuit practical operation
.
Industrial power circuit practical operation
.
Motor forward rotation control
.
Motor interlocking forward and reverse rotation control Circuit
.
Double interlocking forward and reverse control circuit
.
Workbench automatic reciprocating control circuit
.
Motor sequential start control circuit
.
/> .
Motor voltage starting control circuit
Intermediate electrician training course training content: electrical control technology, electrician and electronic basics, maintenance electrician technology, internal and external line electrician
Technology,
Electrical equipment operation,
Principles and applications of programmable controllers for transformer and motor operation and maintenance,
Electrical
Electrical measurement knowledge, practical operations and other advanced training contents: digital circuit technology, factory configuration Electrical technology, factory
electrical control technology,
Principle and application of programmable controller,
Principle and practical technology of single chip microcomputer,
Rectifier and inverter technology, frequency conversion The principle and application technology of the machine, the actual operation, etc. and the prevention of heat dissipation. Wrap the rotating shaft with a cloth soaked in cold water, then pour the engine oil heated to about <>℃ on the inner ring of the bearing and take advantage of the situation to seal the bearing. Remove. How to disassemble the bearing in the end cover hole: When the outer ring of the bearing and the motor end cover hole are tightly assembled, the outer ring of the bearing will remain in the motor end cover hole after the end cover is removed. At this time, the end cover can be placed smoothly on the two iron plates with the stop face facing up, and the bearing cannot be jammed. Then, a metal rod with a diameter slightly smaller than the outer diameter of the bearing can be pressed against the outer ring of the bearing slowly with a hammer. The outer ring of the bearing can be pushed out by tapping the metal rod.