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The overheating problem of the hammer grinder, especially the insufficient
lubrication and the design defect of the heat dissipation system, is an
important reason for the abnormal operation of the equipment.

1. Insufficient lubrication leads to overheating

Insufficient lubrication is one of the common causes of overheating in hammer
crushers (including grinding mills). Grease plays a role in reducing friction,
removing heat and protecting the surface of bearings during their operation. If
the lubrication is insufficient, the frictional heat cannot be effectively
dissipated, resulting in an increase in the temperature of the bearing. If there
is too much grease or its quality is poor, it will also increase friction and
heat accumulation.

1. Insufficient grease

The reason is that insufficient grease will cause the bearing to lack
adequate lubrication when operating at high speed, increasing friction and thus
generating high temperatures.

Solution: According to the equipment requirements, the grease should be added
to 50% to 70% of the bearing space. Regularly check the condition of the grease
and replenish or replace it in time.

2. Excessive or deteriorated grease

– Reason: Excessive grease will increase internal friction and even cause the
oil to stir, generating additional heat. If the grease deteriorates, it will
lose its lubricating and heat dissipation functions.

Solution: Bearings should be cleaned regularly and qualified grease replaced.
The use of inferior or expired grease should be avoided.

3. Improper lubrication method

– Reason: Improper lubrication methods (such as incorrect selection of oil
bath lubrication or grease lubrication) may lead to poor lubrication effect and
affect heat dissipation.

Solution: Select an appropriate lubrication method based on the operating
conditions of the equipment, such as using synthetic grease or adjusting the
grease injection cycle, to enhance the lubrication efficiency.

Second, design flaws in the heat dissipation system

Unreasonable design of the heat dissipation system is another key factor
causing the hammer crusher to overheat. Poor heat dissipation can prevent heat
from being dissipated in time, causing the temperature of the bearings to rise
and even damaging the equipment.

1. Insufficient heat dissipation area

The reason is that the radiator design is unreasonable, with insufficient
heat dissipation area, which cannot effectively remove the heat generated by the
bearing.

Solution: Optimize the heat dissipation structure design, increase the heat
dissipation area, and switch to materials such as aluminum alloy boxes to
enhance heat dissipation efficiency.

2. The heat dissipation path is blocked

– Reasons: Poor ventilation conditions, incorrect installation direction or
nearby heat sources can all affect the heat dissipation effect.

Solution: Improve the installation environment, ensure good ventilation, and
keep heat sources away from the equipment.

3. Improper selection of lubricating oil

– Reason: If the viscosity of the lubricating oil is too high or too low, it
will affect the lubrication and heat dissipation effect.

Solution: Select the appropriate lubricating oil based on the operating
temperature and speed of the equipment, and avoid using inferior or unsuitable
lubricating oil.

Iii. Comprehensive Solutions

In response to the above problems, the following comprehensive measures are
suggested:

Optimize the lubrication system: Regularly check the condition of the grease
to ensure an appropriate amount of lubrication, use high-quality grease, and
adjust the lubrication method according to the operating conditions of the
equipment.

2. Improve heat dissipation design: Optimize the heat dissipation structure,
increase the heat dissipation area, improve ventilation conditions, and avoid
interference from heat sources.

3. Strengthen equipment maintenance: Regularly clean bearings, inspect the
lubrication system, and promptly replace worn or damaged components.

4. Control load and operating conditions: Avoid long-term overloading
operation, rationally arrange the production rhythm, and reduce the thermal load
of the equipment.

Iv. Summary

The overheating problem of hammer grinder is mainly caused by insufficient
lubrication and design flaws of the heat dissipation system. Insufficient
lubrication can lead to the inability to effectively dissipate frictional heat,
while design flaws in the heat dissipation system limit the discharge of heat.
Therefore, efforts should be made to optimize the lubrication system, improve
the heat dissipation structure, maintain the equipment and control the load,
etc., to comprehensively investigate and solve the overheating problem, so as to
ensure the stable operation of the equipment and extend its service life.

http://www.hammer-mill.com
Jiangsu Wulong Machinery Co., Ltd.

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