In daily inspection of special equipment inspection work, often come into contact with double girder overhead crane brake s. Crane brake device configuration is in line with the actual relationship to the service life of equipment and the use of security. Therefore, it is necessary for the crane brake device configuration are discussed. Standard series of braking device commonly used cranes include hydraulic block brake, electromagnet ic block brake, disc brake, band brake, etc., its use to consider general type, specification, and check calculation, also want to consider using the environment and related factors. Crane Brake of Double Girder Crane Crane brake of double girder crane type choice, mainly according to the requirements of the lift machine or agency product standards and actual needs, determine the type of brake. As standard: lifting mechanism, luffing mechanism must be set close-type brake, often walk or slewing mechanism can choose often close-type brake. Consider using places, such as brake installation has enough space, can choose to block, band brake or arm type disc brake; Space limit, can choose the shoes or clip-on disc brake. Consider crane supplier supporting the use of the host environment, the leakage of oil have strict requirements of occasions should choose electromagnetic or pneumatic brake, the environmental temperature high metallurgical places can choose insulation class higher power hydraulic brake or metallurgical type electromagnetic brake. In the environmental temperature is lower or higher, when choosing electric hydraulic brake and open spaces, replace the corresponding brand of hydraulic oil should be paid attention to. In the iron filings and dust serious environment, should avoid to use electromagnet brake, prevent dust from entering the electromagnet gap influence electromagnet suction. For special or important occasions, should according to the need to add additional function of the brake. In low temperature environment, can use electric heater of hydraulic driver. For conversion start and brake process has strict requirements, equipped with state of the switch in order to understand the opening of the brake. For environment maintenance, adjustment more difficult to implement, can be mounted to the equality of device and friction wear brake clearance self-compensation device. Add manually loose brake device can under special circumstances artificial open the brake.