Before installing bearings, quality inspection must be carried out in accordance with relative technical conditions. For ordinary bearings(deep groove ball bearings without seal ring and short cylindrical roller bearings), the cleaning and installing bearings right or not will have a direct impact on the noise of the motor’s bearing. Before cleaning normal bearings, you must first wipe off the antirust used for bearings’ encapsulation. For antirust grease, you can put the bearing into a oil t

working system1, the working system definition: that exposure to a range of motor load conditions, including starting, no load, parking and off to its duration and sequencing.One no-load: means the electric power output in a zero spin state.Full load: means the motor running in its fixed state.Be able to stop and break: refers to neither electrical in movement, nor electricity or mechanical energy input state.2, the working system of the type: working system can be divided into continuous, short

1、The explosion-proof motor should not be disassembled at will; When it is disassembled for examine and repair, the explosion-proof surface of the part can not be used as the fulcrum of the crowbar, especially not allowed to be beat or strike.2、When disassembling the motor, take off the wind shield and the fan first, then take off the bolts of the Endshield and the bearing cap. Next, impact the drive end (abbreviated D.E.) axial with round logs or copper sticks to separate the Endshield and th

1, the two bearings into the rotor-bearing file can be loaded when the hot pack or cold-press method. Regardless of which method to use, force should be added to the bearing inner ring. Heat when the temperature can not be set too high, the general control of the 100 ~ 105 ℃.2,motor will be loaded after the cover after the bearings, and tighten the screws after the bearing caps.3,push a back end cover to stator4, tightening bolts after the cover, put the front cover, the former bearing caps, an

1,Demolition drive pulley (coupling) to drive pulley (coupling) on the set screws loose, and pull out a drive pulley (coupling). If the song does not pull dynamic, you need to set screws in the hole by adding lubricants; If not pulling, kerosene or alcohol lamp can be used in the drive pulley (coupling) cylindrical sleeve around the heating and then pulling. Attention should be paid to control the heating temperature, and motor shaft sleeve to prevent stretching deformation. 2,the demolition of

Winding is an important part of motor, moisture, heat, corrosion, invasion, the impact of external forces can cause damage to the windings.Electrical overload, under-voltage, over-voltage, lack of running also can cause winding failure. Generally wingding fault have winding ground fault, short circuit, open circuit, wiring error. Now introduce failure phenomenon, the causes and inspection methods respectively. one．Winding Grounding Means grounding between winding and iron core or frame caused

Winding short-circuit due to excessive electrical current, supply voltage change is too large, single-phase operation, mechanical bumps which break the insulation. There are four types, inter-turnshort circuit, winding short-circuit, winding pole short-circuit and winding phase short circuit. 1. Fault phenomenon As the three-phase current imbalance caused by uneven distribution of the stator magnetic field, so that the motor run-time increased vibration and noise, seriously motor could not be

1. The frequency of the three-phase asynchronous motor 60HZ, 50HZ, if then in power use, what kind of phenomenon will occur?n = 60f / p ，f is the frequency， n is the speed，P is on the number of Poles60 to 50, speed will be slow to increase iron consumption, the current increases, power reduced, the electrical heating, do not use a full load.2. Driven three-phase asynchronous motor rated load of work, if the power supply voltage drops too much, tend to heat or electrical burn, and why? Driven

Three-phase asynchronous motor speed formula: n = 60f / p (1-s) From the formula, we can see that change in supply frequency f, the number of motor pole pairs p and slip s can be changed to achieve the purpose of speed. Judging from the nature of speed, the difference about speed control is nothing more than two ways.To change the way the exchange of synchronous motor synchronous speed or not to change the speed. First，the number of pole-changing speed of the method This speed control method

In order to ensure electrical work, in addition to normal use in accordance with procedures, normal operation of the process of monitoring and maintenance of attention, but also should carry out regular inspection, maintenance electrical work to do a good job. This can eliminate some problems in time to prevent the failure to ensure safe and reliable operation of motors. Regular maintenance intervals can be considered in accordance with the form of electrical use of environmental decisions.Regul