Crane brakes not only function as a control purpose, but also functions as a safety device. With crane brakes, a crane can speed up or slow down its vertical motion as well as control the rising or lowering goods to stop stably at a required height. Another use of the crane brake is in the crane traveling or luffing mechanism, where it allows the mechanism to stop at a pre-set location.
The crane brakes cane be application in various industries, such as, Transformer, storage and logistics, machining, aerospace, nuclear power, waste management, automobile, papermaking, wind power, steel, metallurgy, material handling, nuclear power, and petrochemical industries.
Crane brake is a very important parts of types of cranes for the sake of crane safety, which requests check once every shift. In the following, there are the frequently asked question on crane brake maintenance for your reference.
This is because the crane brake wear, main spring gradually relax or crane brake bracket of each hinge point to causes such as hole or shaft wear is too large, if the crane brake wear to half the thickness of the original belt was replaced.
The pin shaft wear is more than 5% of the original diameter, ovality to replace more than 1mm, when 5% more than the original aperture, hole wear available reamer reaming, and to make corresponding pin.
If the hole wear is very big, can be used after reaming jacketed or pastry processing hole to repair again after welding.
this may be due to crane brake is badly worn or take off, long stroke crane brake core on the bracket or frame, sometimes connection electromagnet and the traction bar connection plate of small shaft slipping out, make a connection plate back down on the frame, sometimes hydraulic push rod pressure on the shell, there is also a spring failure or damage reasons such as Crane brake bracket, the Crane brake can not hold brake wheel and cause, in addition to the replacement and repair the damaged parts, crane brake should be adjusted.
Wheel crane brake shoe
This is mainly due to install is not good. Crane brake while open sometimes, but there is a Crane brake band never left Crane brake wheel, friction each other at work, make the temperature of the Crane brake wheel short time up to 300 ~ 400 degree, crane brake with smoking, should timely adjust the crane brake the brake wheel brake surface parallel.
Sometimes in summer in the high temperature workshop work continuously the lifting mechanism of crane brake wheel, also can appear the high temperature situation, should be timely to cool, the rise of temperature of the crane brake wheel used in crane, generally no higher than the environment temperature of 120 degree, the surface temperature of the winter (below zero 20 degree) -- it is usually below 50 degree, the best cooling method, high temperature crane brake wheel of empty hook hoisting mechanism in running a quadratic limit scope, from 300 to 400 to around 70 (environmental temperature around 20 degree), should be paid attention to in the high temperature when the crane brake tight brake, after cooling may become very loose, need to adjust the crane brake.
It may due to the hinge point card death cannot turn the main spring force is too large, hydraulic push rod hydraulic solenoid or lack of oil or air in cylinder no is put, coil burned or rectifier component, there is something wrong with the line, the voltage is too low, after find out the reason, should be timely repair. Braking of each hinge point application of thin oil pouring once a week, make its can reduce wear and flexible rotation.
Crane brakes on double girder overhead crane