YFX-550/80 Electro-hydraulic Storm Braking Wedges Brakes

The YFX - 550/80 is an electro - hydraulic windproof wedge brake, mainly used for windproof braking of various rail - mounted cranes in outdoor operations. It has the advantages of reliable performance and convenient maintenance. The following is a detailed introduction to its core information such as working principle, key parameters, installation steps and maintenance methods:

Working PrincipleThis brake is composed of an electro - hydraulic pusher, a lever, a connecting rod and an iron wedge, and realizes braking and release by means of the wedge self - locking principle and the drive of the electro - hydraulic pusher:

Release state: When the crane needs to move, the brake is powered on. The push rod of the electro - hydraulic pusher rises rapidly, pushing the lever to deflect counterclockwise. Then the lever drives the connecting rod to lift the iron wedge. At this time, the crane can move normally along the track without being blocked by the brake.

Braking state: When the crane stops working, its traveling mechanism is powered off, and the electro - hydraulic windproof wedge brake will also be powered off after a certain delay. The push rod of the pusher descends under the action of the spring force, driving the lever to deflect clockwise. The connecting rod then places the iron wedge on the track. If the crane has a slight displacement towards the iron wedge due to wind force, the wheel will press on the iron wedge. Under the combined action of the brake spring pressure, the lever and the connecting rod, the friction block on the iron wedge will be closely attached to the track, generating sufficient friction to wedge the wheel tightly and prevent the crane from sliding.

Key Parameters

Installation Steps

Pre - installation preparation: First, check whether there are cracks or deformations in components such as the brake frame, iron wedge, electro - hydraulic pusher and connecting rod, and confirm that the push rod of the pusher can move flexibly without jamming. Prepare tools such as a chain block, an electric welding machine, and bolts. Then clean the installation position on the crane to remove oil stains, rust and debris, so as to ensure the firmness of subsequent installation.

Positioning and fixing: This brake is usually used in pairs. It is arranged oppositely along the two traveling directions of the traveling wheel on the same side of the track and symmetrically on both sides of the track. Use a chain block to lift the brake to the preset installation position. It can be fixed by welding or bolts. When welding, the flange plate of the brake and the end face of the ground beam should be firmly welded, and the welding temperature should be controlled to avoid deformation of the brake frame. When using bolts for fixation, first loosely connect the brake with the crane, adjust the position and then tighten the bolts.

Electrical connection and interlocking setting: Connect the circuit of the electro - hydraulic pusher to the crane's electrical system, ensuring that the power supply parameters match. Install a mechanical interlocking switch. When the iron wedge is not lifted normally, the switch will cut off the power supply of the crane's traveling motor to avoid the crane moving when the brake is in the braking state.

Post - installation adjustment: Confirm that the lifting height of the pusher's push rod meets the standard. If the height is insufficient, adjust the overall position of the brake through the long hole on the fixing plate. Check the fit between the iron wedge and the wheel and the track to ensure that the iron wedge can fall accurately onto the track and can be smoothly lifted without jamming.

Maintenance Methods

Daily inspection: Regularly check the fit state of the iron wedge with the wheel and the track, and promptly remove dust, gravel and other debris on the friction surface of the iron wedge. Inspect the connecting parts of the lever and the connecting rod. If there is looseness, tighten them in time. Check whether the electro - hydraulic pusher has oil leakage. If oil leakage is found, repair the seal or add the specified type of hydraulic oil.

Regular maintenance: The main swing hinge points of the brake are equipped with self - lubricating bearings. Check the bearing state every quarter. If the transmission is inflexible, replace the bearings in time. Regularly check the wear degree of the iron wedge. If there are obvious wear, deformation or cracks, replace the iron wedge. Clean the electro - hydraulic pusher with clean diesel oil regularly, and replace the spring if it is fatigued and deformed.

Special environment protection: In high - humidity and corrosive environments such as ports and docks, the inspection cycle should be shortened, and the brake frame should be painted regularly to prevent corrosion. When used in an environment below - 20℃, take thermal insulation measures for the electro - hydraulic pusher to prevent the hydraulic oil from freezing. When the crane is out of service for a long time, lift the iron wedge and do a good job of rust and dust prevention for the whole brake.

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