TYW-315 Foot Operated Hydraulic Drum Brakes

The TYW - 315 is a member of the TYW series foot - operated hydraulic drum brakes. It is widely used in the rotating mechanisms of small and medium - sized gantry cranes and tower cranes due to its reliable braking performance and convenient operation. The following is a detailed introduction to its core parameters, prominent features, installation steps and maintenance methods:

Core ParametersThis type of brake is designed with a horizontal installation structure. Relevant key parameter information is as follows. The drum diameter is 315mm, and the weight of the whole machine is 42kg. In terms of hydraulic oil selection, DB - 25 hydraulic oil is applicable when the ambient temperature is between -20℃ and 50℃. When the temperature is lower than -20℃, YH - 10 aviation hydraulic oil should be used, which can adapt to most general industrial working temperature environments.

Prominent Features

Labor-saving operation and stable braking force: It adopts hydraulic drive and is controlled by a foot - operated hydraulic pump. Based on Pascal's principle, the hydraulic system can amplify the foot force, with a lever ratio of more than 10:1. This enables the operator to achieve a large braking force with a small pedal force, which is very suitable for scenarios with limited operation space and high braking force requirements. And the braking can be carried out infinitely, ensuring flexible and continuous braking operation during the working process of the equipment.

Low later maintenance cost: It is equipped with a patented interlocking shoe clearance balancing device and a shoe automatic centering device. These two devices can keep the clearance of the brake shoes on both sides balanced all the time, eliminating the need for frequent manual adjustment and avoiding the problem that one side of the brake lining sticks to the brake wheel. In addition, the main hinge points are equipped with self-lubricating bearings, which have high transmission efficiency and long service life, and no additional lubrication operation is required during the operation period.

Convenient maintenance and diverse options: The brake lining adopts a clamped integral molding structure. When the brake lining is worn and needs to be replaced, the operation is simple and fast, which effectively shortens the maintenance time. At the same time, the manufacturer provides brake linings of different materials such as semi - metallic (non - asbestos) hard, semi - hard and soft (non - asbestos) for users to choose from, so as to meet the needs of different working conditions.

Safe and reliable with multiple guarantees: It is a normally open brake and is equipped with a manual brake device. When the equipment is in a non - working state, the manual brake device can be used for braking to ensure the safety of the equipment when it is shut down. In case of unexpected failures such as hydraulic system failure, the manual brake can also be used as an emergency braking measure to further improve the safety of the equipment.

Installation Steps

Pre-installation preparation: First, check whether the brake body, foot pump, connecting oil pipe and other components are cracked or damaged. Especially check whether the oil pipe has aging and leakage problems. Then clean the installation surface and the connecting parts of the brake to ensure there is no oil stain, rust or metal debris, so as to avoid affecting the installation firmness and the tightness of the oil circuit connection.

Formal installation and connection: Install the brake horizontally at the preset position of the rotating mechanism of the crane. Align the mounting holes of the brake with the reserved holes of the equipment, and use high-strength bolts to fasten them. After installation, confirm that the brake is free of tilting. Then connect the oil pipe of the brake with the foot pump. After the connection, check whether the interface is sealed tightly, and apply a proper amount of sealant at the connection if necessary to prevent oil leakage. Finally, install the manual brake device and ensure that its connecting parts are flexible and movable.

Post-installation debugging: Inject the matching hydraulic oil into the hydraulic system according to the ambient temperature. After oil injection, step on the foot pump repeatedly to discharge the air in the oil circuit, so as to avoid the impact of air on the braking effect. Then carry out an idle test. During the test, observe whether the brake can be quickly engaged and released. At the same time, check whether the clearance between the brake shoes on both sides is balanced to ensure that the braking operation is stable without jamming.

Maintenance Methods

Daily inspection: Every 1 - 2 days, check the surface of the brake drum and brake lining. If there are oil stains, dust or metal debris, wipe them clean with a dry cloth in time to prevent the friction coefficient from decreasing and affecting the braking effect. At the same time, check the tightness of the oil pipe connection and the mounting bolts. If any looseness or oil leakage is found, deal with it immediately.

Regular in-depth maintenance:

Monthly inspection: Focus on checking the hydraulic oil level. If the oil level is lower than the specified scale, make up the hydraulic oil of the same model in time. Check the wear of the brake lining. If the wear is slight, it can continue to be used; if the wear is serious and the internal steel plate is exposed, replace the brake lining in time.

Quarterly maintenance: Disassemble and inspect the foot pump and the one-way valve of the brake. Clean the internal impurities with clean diesel oil to ensure the smooth circulation of the oil circuit. Apply dry molybdenum disulfide grease to each rotating part of the pedal and connecting rod to ensure flexible operation. Check whether the self-lubricating bearings at the hinge points are worn. If the rotation is blocked, replace the bearings.

Annual overhaul: Conduct a comprehensive disassembly inspection of the whole brake. Check whether the brake drum has cracks, severe wear or deformation. If the end face runout exceeds the standard, polish or replace the brake drum. Inspect the manual brake device. If the connecting parts are worn or the action is inflexible, repair or replace the relevant parts. After the overhaul, reassemble and debug the brake to ensure that all performance indicators meet the operation requirements.

Special maintenance for harsh conditions: In dusty and humid environments such as ports and construction sites, shorten the daily inspection cycle. After rainy weather, wipe the brake surface in time to prevent rust. For cranes that need frequent braking, pay attention to the temperature of the hydraulic system. If overheating occurs, stop the machine for cooling in time to avoid the decline of hydraulic oil performance due to high temperature, which will affect the braking effect.

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