Introduction of several types of crane buffers and their characteristics

Buffer crane is mounted on the crane both end portions of the running gear as a buffer means, if the crane operation mechanism because of inertia reason, not brake in time, is likely to collide with the end stop in the track body, the purpose of the assembly is to cushion the impact of the buffer , Protect mechanical equipment. Buffers should also be set between cranes running on the same track and between double trolleys on the same bridge.

Crane buffers can be divided into physical buffers, spring buffers and hydraulic buffers. The physical buffers are further divided into rubber buffers and polyurethane buffers.

1. Physical buffer.

1. Rubber buffer: This kind of buffer has a simple structure, but it can absorb less energy. It is generally used in occasions where the crane's running speed does not exceed 50/min. It mainly plays a blocking role.

2. Polyurethane buffer: Polyurethane foam plastic buffer absorbs large energy, has good cushioning performance, oil resistance, aging resistance, acid resistance, corrosion resistance, high temperature and low temperature resistance, insulation and explosion-proof, relatively small and light relative density, simple structure, low price, no Features such as noise, no sparks, convenient installation and maintenance, and long service life. Therefore, it has been widely adopted in the world. In general cranes, it can replace rubber and spring buffers, and it is more worthy of promotion in explosion-proof places.

2. Spring buffer.

The spring buffer is mainly composed of a bumper, a spring and a shell. Its characteristics are relatively simple structure and reliable use. When the crane hits the spring buffer, its energy is mainly transformed into the compression energy of the spring. The improved spring buffer with anti-elastic mechanism can prevent rebound force.

3. Hydraulic buffer.

When the buffer is subjected to collision pressure, the kinetic energy is transferred to the piston through the plug and the accelerating spring, causing it to move to the right. The original buffer working chamber is equipped with a return spring, ejector rod and oil. The movement of the piston squeezes the oil in the working chamber, so that the return spring is compressed, and at the same time, the oil is squeezed out from the annular gap between the piston and the ejector rod and enters the oil storage chamber.

When the piston starts to move, due to the large annular gap with the ejector rod, the oil is easily squeezed out; as the piston continues to move, the annular gap becomes smaller and smaller, that is, the piston resistance continues to increase. After reaching the cylindrical stage of the ejector pin, the annular gap is difficult to tell, and the resistance is stabilized at the maximum value. The process in which the buffer is compressed is a process in which the piston squeezes the oil to do work. This process consumes a lot of kinetic energy and acts as a buffer. When the work is completed, the piston is pushed to the original position by the return spring, completing a work cycle.

At present, the common buffer is a physical buffer, which is low in price and easy to install and use. If the crane has been used for a long time and needs to replace the buffer, please hubungi kami.

Bagikan di Facebook

Tweet di

Ikuti kami

Simpan