Brass Worm Gear Set

In order to improve efficiency, worm gear box generally use non-ferrous metals as worm gears, and the worm adopts harder steel. Due to the sliding friction transmission, more heat will be generated during operation, resulting in differences in thermal expansion between various parts and seals of the reducer, so as to form a gap on each mating surface, and the lubricating oil becomes thinner due to the increase of temperature, which is easy to cause leakage. There are four main reasons for this situation: first, the collocation of materials is unreasonable; Second, the surface quality of the meshing friction surface is poor; Third, the selection of lubricating oil addition amount is incorrect; Fourth, the assembly quality and use environment are poor.

The worm gear is generally made of tin bronze. The matched worm material is hardened to hrc4555 with 45 steel or hrc5055 with 40Cr, and then ground to roughness Ra0 by worm grinder eight μ m。 The wear of reducer is very slow during normal operation, and some reducers can be used for more than 10 years. If the wear speed is fast, it is necessary to consider whether the type selection is correct, whether it operates under overload, as well as the material, assembly quality or service environment of the worm gear.

The advantages of worm gear box are:

As a traditional transmission device, worm gear reducer is composed of worm gear and involute tooth profile.

1. Compact mechanical structure, light volume and small size.

2. Good heat exchange performance and fast heat dissipation.

3. Simple installation, flexibility, performance and easy maintenance.

4. Large transmission speed ratio, large torque and high overload bearing capacity.

5. Stable operation, low noise, durable.

6. Strong applicability and safety.

7. Long service life, low allowable input speed range and large deceleration range.

8. The self-locking function is suitable for lifting operation.

The disadvantages of worm gear box are:

The work efficiency is too low, only 60% to 70%. And the worm is usually output by shaft. It is difficult to control the air return, especially when the running in time of the turbine and worm is relatively long, the air return is relatively large.

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