When the rotor core is pressed into the rotating shaft, the outer circle of the rotor core is also required to be refined, and the main processing technology is as follows: the outer circle of the rotor and the bearing file should be in the coaxial line, otherwise it will cause the eccentricity. The size precision and finish of the outer circle of the rotor should be in accordance with the requirements of the drawings, otherwise it will cause the air gap is too large or too small, which affects

The ventilation noise of the motor is mainly the following three kinds of components:(1) when the blades rotate, the blades of the vortex fan make the vortex flow, which is caused by the viscous force, and they break down into a series of small vortices, which cause the air to be disturbed. In addition, in the corner of the airflow movement, if there is a large cavity, it will produce a vortex sound. Vortex sound is a random steady noise of broadband. (2) the monotonous sound (Qi Disheng) is gen

The frame is the main parts of the motor, greatly affects the uniformity on motor interchangeability and air gap. Base of general small and medium AC asynchronous motor, most of them are easy to deformation of the thin-walled castings, the structure, process and machining are more complex, the motor manufacturing technology of key components. Cast iron grade Y series and Y2 series HT150, HT200, Y2 series base thickness is Y series thinning 0.5~2mm. Frame main processing surface: core and stator

1, starting current should be as small as possible, because of the large starting current is unfavorable, the main damage is: 2, starting torque should be as far as possible to generate enough starting torque. The starting current of the asynchronous motor is very big, but the starting torque is not too large. Because when starting, s=1, although I2 is very large, because the cos 2 is very low, so they don't have a large starting torque. 3, starting at the start of the process, the speed s

The electromagnetic noise is one of the main noise source of motor, in the multipolar motor or ventilation noise lower motor, electromagnetic noise is more prominent, under normal circumstances it with the motor power is increased and increased and load to increase the noise source. The noise and motor electromagnetic design parameters are closely related, such as improper design, electromagnetic noise will be very obvious, there may become more than the main noise source to the other noise (ven

The definition of the work system: the motor is subjected to a series of load conditions, including starting, no-load, stopping and breaking energy and its duration and sequence of order. Where the no-load: refers to the motor at zero power output of the rotating state. Full load: refers to the state of the motor at its quota of running. Stop and break: refers to the motor in no movement, no electricity or mechanical energy input state.

The noise is a combination of various frequencies and different intensity of the noise, and this annoying sound is well known to human harm. The noise tends to vibrate with vibration, and too much vibration can damage other equipments. The vibration noise level reflects the level of product design and manufacturing, and is an important index of product quality.. It is now generally recognized that the importance of reducing noise. As service staff should be clear how motor noise is generated, an

(1) calcium sodium based grease. (2) composite calcium based grease. (3) molybdenum disulfide compound calcium-based grease. (4) lithium grease. (5) HP-R grease. Bearings on both sides of the bearing cap, on the one hand protect the bearings, so that dust does not enter the run, the other is the local storage of grease, the grease in the cover of the requirements can not be too much or too little, usually cover internal volume of 1 / 2 ~ 1/3. Bearing grease is generally added to the bearing out

The first drop point: that the grease is heated to a certain extent began to drop the first drops of temperature, it marks the grease heat capacity, maximum working temperature of various lubricating grease should be 20~300C. lower than the drop point。 Second cone penetration: at a certain temperature, certain weight with conical hammer into the grease inside 5S for cone penetration depth, the lubricating grease. It said grease sticky degree. Cone penetration of lubricating grease is too small

Removal pulley (coupling) will drive pulley set screws (coupling) on the loose, pulled out with a pulley puller (coupling). If you have not pulled loose movement, you need to set screw hole to join lubricants; if still pull no available kerosene or alcohol lamp to pull in the drive pulley (coupling) and then heating the surrounding outer sleeve. Note that when the heating temperature control, to prevent deformation of the sleeve and the motor shaft extension. Remove the bearing cap and remove th