Overview of Motor Flange
A flange is a disc-shaped component that is most common in pipeline engineering and is always used in pairs. In pipeline engineering, flanges are mainly used for pipeline connections. For the pipelines that need to be connected, a flange disk is installed on each end. Low-pressure pipelines can use threaded flanges, and welded flanges are used for pressures above 4 kilograms. A sealing gasket is placed between the two flange disks and then fastened with bolts.
Flanges of different pressures have different thicknesses and use different bolts.
Pumps and valves, when connected to pipelines, the local parts of these equipment are also made into corresponding flange shapes, also known as flange connections.
Any connecting part that is bolted and closed around two planes is generally called a “flange”, such as the connection of ventilation ducts. This type of part can be called a “flange-type part”.
Overview of Motor End Cover
The end cover (Cover) is a rear cover installed at the rear of the casing of a motor, commonly known as the “end cover”. The end cover generally refers to the covers at both ends of a motor where the axial dimension is greater than the radial dimension. The main function is to determine the spatial position of the rotor’s shaft. Of course, it needs to cooperate with different types of bearings and is connected to the fixed casing of the motor stator through the end cover to ensure the clearance between the rotor and the stator. It is usually made by a cast iron process, and for small motors, it can also be formed by sheet metal stamping.
Quality Measurement of End Cover
The end cover (Cover) is good or bad, which directly affects the quality of the motor. Therefore, we first need to understand what is the standard for a good or bad end cover. A good end cover mainly comes from its core – the brush piece. Its function is to drive the rotation of the rotor. This part is the most critical part. So how do we measure its quality? It mainly has the following several standards:
- Not too high.
- Not too low.
- Not too short.
- Not forked.
- Not bent.
- Not curved.
Why are there these several standards?
Because as long as there is a problem in any link of the brush piece, it will affect the quality of the motor. If the brush is too high, it will touch the varistor; if it is too low, it will touch the white gasket; (seen in the rotor) if it is too short, it will not touch the rotor, which will make the rotor unable to operate; if the brush is forked, the current will be unstable; of course, it cannot be bent, which will make the current abnormal. It should be supplemented that the brush piece of the end cover is very fragile. A little carelessness can cause the brush to fork or bend. Pay attention!
As one of the very important mechanical parts, the end cover has a wide range of uses. The main working surfaces of this part are the left and right end faces and the outer cylindrical surface of the left end face. The general functions are:
- Axial positioning of the outer ring of the bearing;
- Dust prevention and sealing. Besides being able to prevent dust and seal itself, it often cooperates with sealing elements to achieve the sealing effect;
- The end cover located between the motor of the lathe and the spindle box mainly plays the role of transmitting torque and buffering and shock absorption to make the rotation of the spindle box stable.
