Differences between vertical and horizontal motor tests_Wolong Nanyang Explosion-proof Motor, China Motor Manufacturer

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Differences between vertical and horizontal motor tests

source：未知 time：2024-11-12 15:48nbsp; click：

Compared with horizontal motors, the most significant difference between vertical motors and horizontal motors is the different installation methods, followed by the different structural design solutions derived from this. Under normal circumstances, the basic series of motors with center heights of 225 and below in frame sizes generally only have different installation methods during use. As long as the installation interfaces match, they can operate normally. When the frame size is larger, or the motor bearings and casing are not sufficient to carry the specified external force or the external force exerted during actual operation, the structural design plan will be greatly different. For example: use bearings or bearing components that can carry larger axial forces, increase the strength of the shell, design special end caps, bearing caps, etc.

In addition to the above-mentioned installation interface forms, and the necessary adjustments to the structure and support methods of rotating parts, there are also large differences in motor tests. Especially for large vertical motors, not only the necessary tooling must be designed, but sometimes some other auxiliary measures and relatively accurate equivalent test methods must be taken. Inspection tests do not require two motors to be tested in a shaft connection. It is only necessary to consider that the bearing will not be damaged when the motor rotates. However, during type tests, necessary tooling must be considered. Some equivalent tests such as the superimposed frequency method will be used during the test. The equivalent test method will naturally have some deviations, but in most cases, the deviations caused by this are usually acceptable. A few demanding customers will obviously not tolerate such deviations. For example, motor manufacturers use horizontal structures to evaluate the performance of vertical motors, and some users simply do not accept type tests that change the original structure of the motor. Knowledge expansion-vertical motors Vertical motors are motors whose output shaft axis is perpendicular to the chassis or the speed change mechanism. Their outstanding feature is that the mounting holes are centered on the output shaft and are evenly spaced around. Vertical motors are arranged vertically on the driven machinery, and the motor shaft also drives the machinery vertically. It is widely used in industrial production, such as vertical water pumps, vertical lathes, etc.

According to the provisions of GB4831, the vertical motor model consists of two parts, product code and specification code, arranged in sequence. The product code is represented by the motor series code, such as:

YL represents a three-phase vertical asynchronous motor with a squirrel cage rotor that does not bear axial force; YLST represents a three-phase vertical asynchronous motor with a squirrel cage rotor that bears axial thrust; YKKL represents a three-phase vertical asynchronous motor with a fully enclosed squirrel cage rotor with an air-to-air cooler; YKSL represents a three-phase vertical asynchronous motor with a fully enclosed squirrel cage rotor with an air-to-water cooler, etc. Vertical motors mostly adopt the internationally popular box-type structure. The square base is made of welded steel plates, which has the advantages of good rigidity and light weight. The covers or air (water)-air coolers on both sides of the base can form motors of different series. Most stators adopt an external pressure-mounted structure, and their stator windings use F-class edge materials and anti-corona materials. The winding ends are fixed with a special binding process, which is firm and reliable. The entire stator is treated with a vacuum pressure process of vacuum pressure impregnation F-class solvent-free paint. The motor has excellent and reliable insulation performance and moisture and impact resistance.

The rotor adopts cast aluminum rotor or copper bar rotor structure according to the size of the motor rotor. No matter which structure of the rotor is adopted, its structure and manufacturing process can ensure the reliable operation of the motor. According to whether the motor bears axial force or the size of the axial force, the upper bearing structure of the motor has two types: rolling bearing or sliding bearing, and the lower bearing structure is rolling bearing. The motor with rolling bearing structure has non-stop grease filling and draining device. The main outlet box is a sealed structure with a protection level of IP54. The wire inlet hole of the outlet box can be switched up, down, left or right, and there is a separate grounding terminal in the box.

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