Jiaozuo brake

Crane safety disk brake performance knowledge reference

The safety disc brake to be added here refers to adding brake discs on the drum and placing array disc brakes at appropriate positions with reference to the brake settings of the vertical Boat lift, so that they become a completely independent safety braking system. The advantages of doing so are obvious.

(1) Freed the manual operation of guardians and reduced the risk of injury;

(2) Enhanced the safety and reliability of crane operation, effectively preventing the expansion of accidents in the event of crane accidents. Simply put, if a crane experiences a gear shift or hook slip accident, even in the event of damage to the starting motor, transmission shaft, working brake, and gearbox, the safety brake of the drum can effectively close and brake, preventing the hook from continuing to slide and preventing the accident from further expanding;

(3) On some special Overhead crane that need to be mechanically switched between high and low speed gears by the gearbox,

The disc brake has the following advantages:

1) The disc brake has no friction potential, so the brake efficiency is less affected by the friction coefficient, that is, the brake efficiency is stable;

2) In the disc brake, the unit pressure of the friction block to the brake disc is relatively high, which is easy to squeeze water out. After the wheels wade into water, the change in braking efficiency is relatively small, and due to the centrifugal force and the friction effect of the pads on the brake disc, only one or two brake applications are needed after the water is released, and the performance can be restored.

3) When the output braking torque is the same, the size and mass are smaller.

SBD and ST3SH images

The thermal expansion of the brake disc along the thickness direction is extremely small, and it will not significantly increase the brake clearance like the thermal expansion of the brake drum, resulting in excessive brake pedal travel. Easy to achieve automatic clearance adjustment, and other maintenance and repair operations are also relatively simple. In addition to the advantages of the above braking performance, the disc brake has the characteristics of low noise and low vibration in use, which improves the riding comfort., Just turn on the safety brake and brake it, ensure that the drum is tightly held by the safety brake, and take corresponding measures to prevent the safety brake from mistakenly operating. You can then release the working brake as needed to switch between high and low gears. Brake Fundamentals Training - Brake Fundamentals Training defines the mechanism that generates forces that prevent the movement or tendency of a vehicle. The function is to reduce or stop the speed of vehicles in motion. Brake knowledge. PDF, Brake knowledge 1. Purpose and scope of application are mainly used in heavy industrial fields such as metallurgy, mining, building materials, electricity, machine manufacturing, and transportation fields such as ports and railway loading and unloading. It can slow down or even stop cars in motion, keep the speed of cars traveling downhill stable, and keep stopped cars stationary, These actions are collectively referred to as braking; A series of specialized devices installed on a car so that the driver can apply a certain amount of force (mainly on the road surface) to certain parts of the car (mainly on the wheels) based on road and traffic conditions, to brake the car to a certain extent. This controllable external force for braking the car is called braking force; This series of specialized devices is called a braking system. The braking system used to slow down or even stop a moving car is called the service braking system; A device used to keep a stopped car stationary is called a parking brake system. These two brake systems are mandatory for every car. At present, the vast majority of crane brakes are hub type brakes. When it is necessary to open or brake, the force of the brake spring is compressed or released by electromagnetic suction, discharge, or oil pump starting or stopping, so that the brake shoe leaves the brake wheel or is clamped onto the brake wheel, achieving the requirements of opening or braking. Nowadays, in lifting work, especially when lifting large heavy objects, several staff members responsible for monitoring are often equipped on the crane. The purpose is to use tools such as crowbars to increase the pressure on the brake shoes on the brake wheels in case of derailment or hook slipping accidents during lifting, in order to achieve emergency braking and reduce the degree of damage caused by the accident. The safety brake is set as a normally open safety brake, which always remains fully open. The braking work for crane lifting is completed by the working brake, which serves as a backup for protection. The safety brake is only put into use when the crane malfunctions or accidents occur, or when the service brake needs to be repaired and the service brake needs to be released to switch between high and low gears