8 common questions about pneumatic marine winches
The pneumatic marine winch is a light and small lifting equipment that uses a drum to wrap a wire rope or chain to lift or pull heavy objects (see lifting machinery). It can be used alone or as an integral part of lifting, road construction, and mine hoisting. The components are widely used due to their simple operation, large rope winding capacity, and convenient relocation.
The following problems may occur during the operation of the pneumatic marine winch:
1. Hidden danger of air leakage: The air tugger winch requires compressed air to work. If there is air leakage in the air pipe, pneumatic components, and other components, it will cause the winch to suddenly fall and cause a serious accident.
There are many reasons for air leakage in pneumatic air winch. The common ones are as follows:
① Poor sealing: Poor sealing is one of the most common causes of air leakage. The aging may cause, damage or improper use of the sealing gasket, loose bolts, scratched screws, etc may cause it.
② Joint damage: The joint of the pneumatic winch is the component that connects the air source pipeline and the winch body. If the connection is damaged or loose, it can cause gas leakage.
③ Insufficient air source pressure: If the air source pressure is lower than the operating pressure of the winch, it will also cause air leakage in the pneumatic winch.
④ Improper use: It may be due to improper use, such as improper operation, improper maintenance, expired service life, etc.
2. Explosion hazard: During the use of the pneumatic winch, if the possible oil and gas mixture inside the machine is not properly handled, sparks may occur due to operator negligence, leading to an explosion.
3. Potential risk of accidental injury: The pneumatic air winch is a relatively dangerous lifting tool. During use, if the operator fails to repair the fault in time or operates improperly, accidents such as decoupling, falling, and pinching may easily occur.
4. Insufficient lifting weight: This may be due to reasons such as the wear gap of the air motor piston ring is too large, the air intake pressure not meeting the specified requirements, the air supply pipeline not meeting the regulations, etc.
The main reasons for the insufficient lifting power of the air tugger winch are:
① The wear gap of the pneumatic motor piston ring is too large, resulting in accelerated gas leakage;
② The air inlet pressure does not meet the specified requirements for winch lifting;
③ The gas supply pipe diameter is not installed according to the specified requirements. The pipe diameter is too small, the gas supply volume is insufficient and the pressure loss is too large.
5. Difficulty in starting operation: This may be because the piston connecting rod and housing are not cleanly assembled after repair, and the clutch is not engaged.
Common reasons include:
① During the maintenance and installation of the pneumatic air winch, the piston connecting rod and shell were not assembled cleanly, and there were foreign matter and impurities;
② If the clutch is not closed as required, causing problems with the start of the winch, the pneumatic motor must be removed in time, cleaned again, and checked to see if there are no foreign objects before assembly;
③ The wear gap between the small and big ends of the connecting rod is too large, and the wear gap of the rolling bearing of the crankshaft main journal is too large, which will cause abnormal operation sounds. The piston pin, crankshaft copper sleeve, and ring must be replaced, and the crankshaft main journal must be replaced. Rolling bearings on.
6. There is an abnormal impact sound during the operation of the air motor: it may be due to the large wear gap between the small end and the big end of the connecting rod, the too-large wear gap of the crankshaft rolling bearing, etc.
7. Brake device failure: It may be due to reasons such as the brake belt being too loose.
