Motor Flange Overview

A flange is a disc-shaped component, most commonly used in pipeline engineering, and they are always used in pairs. In pipeline engineering, flanges are primarily used for connecting pipes. To connect pipes, a flange plate is installed on each pipe, with low-pressure pipelines using threaded flanges, and those with pressure above 4 kg using welded flanges. A gasket is placed between the two flanges, and they are fastened with bolts.

Flanges of different pressures have different thicknesses and use different types of bolts.

For equipment like water pumps and valves, when connecting to pipelines, the corresponding parts of these devices are also made into flanged shapes, known as flange connections.

Any component that uses bolts to connect two planes and seals the connection is generally referred to as a "flange," such as in the case of ventilation duct connections. These components are commonly called "flanged parts."

Motor End Cover Overview

An end cover (Cover) is a rear cover mounted at the back of the motor housing, commonly referred to as the "end cover." The end cover generally refers to the cover at both ends of the motor where the axial dimension is larger than the radial dimension. Its main role is to determine the spatial position of the rotor shaft, and it needs to fit with various types of bearings. The end cover is connected to the motor's stator housing, ensuring the clearance between the rotor and stator. Generally, end covers are made using casting processes, and small motors may use stamped sheet metal.

End Cover Quality Assessment

The quality of the end cover directly impacts the quality of the motor. Therefore, it is essential to understand the standards for evaluating a good or bad end cover. The primary component that defines the quality of the end cover is its "brush plate," which drives the rotation of the rotor. This part is the most critical. Here are the key standards for assessing an end cover:

1. Not too high.

2. Not too low.

3. Not too short.

4. Not forked.

5. Not bent.

6. Not curved.

Why are these standards important?

Any issue with the brush plate can affect the quality of the motor. If the brush is too high, it will contact the pressure-sensitive resistor; if it's too low, it will touch the white washer (on the rotor); if it's too short, it won't contact the rotor, causing the rotor to fail to rotate; if the brush is forked, the current will be unstable; if it's bent, the current will be irregular. Additionally, it should be noted that the brush plate of the end cover is fragile, and any carelessness can cause the brush to fork, bend, or become damaged.

The end cover, as one of the most important mechanical components, is used extensively. The primary working surfaces of this part are the left and right end faces, as well as the outer circular surface of the left end face. Its general functions include:

1. Axial positioning of the bearing outer ring;

2. Dustproof and sealing; besides its own ability to seal, it is often used in combination with sealing elements for enhanced sealing performance;

3. In the case of the motor end cover located between the lathe motor and spindle box, its primary role is to transmit torque and absorb shocks, ensuring smooth rotation of the spindle box.