跳至主要内容

BTMA- How to extend the service life of the crusher



When the crusher is working, the wear speed of the upper and lower parts of the crushing plate is different. The lower part wears faster than the upper part. When the crusher is working, the crushing plate is in direct contact with the material and bears the crushing force and friction of the material. , The service life of the crushing plate is directly related to the working efficiency and production cost of the jaw crusher. Therefore, it is particularly important to extend the service life of the crushing plate of the jaw crusher.

The jaw crusher is composed of a movable jaw and a fixed jaw. The crushing force it bears and the friction of the material are easily worn out. In order to protect the jaw plate, wear-resistant lining plates are generally installed on the surface of the movable and fixed jaws. The board is also called the broken board.

In production, the crushing plate acts directly on the material, and the crushing force is very large, especially when crushing materials with high hardness, it will cause the bolts of the crushing plate to vibrate and the nuts to loosen, which will aggravate the wear of the crushing plate and generate great noise. If the board falls off or breaks, the equipment shuts down and affects normal production.

Generally, fine and uniform crystal grains, spherical carbides and uniform distribution, are all conducive to improving rolling contact fatigue life. After the bearing steel is processed, the more retained austenite and the coarser the acicular martensite, the lower the beneficial residual compressive stress and the strength of the carburized layer on the surface, and the easier it is for microcracks to occur. Under the same condition of the undissolved carbide state, when the mass fraction of carbon in martensite is about 0.4% to 0.5%, the strength and toughness of the material are better matched, and the contact fatigue life is long. For the undissolved carbides, through appropriate heat treatment, it tends to be small in volume, small in size, and uniformly distributed, avoiding the appearance of coarse or band-shaped carbides, which are all conducive to fatigue cracks. As the hardness increases within the range, its contact fatigue resistance will increase accordingly. In addition, it is also important to match the surface hardness of the two contact rolling elements.

The surface roughness of the liner. Appropriately reducing the surface roughness of the liner is the way to improve the resistance to fatigue and wear. The required level of the surface roughness of the liner is related to the contact stress on the surface of the liner. Usually, the liner is required to be exposed to fire or high surface hardness. The surface roughness of the board is low.

标签：

评论

发表评论

此博客中的热门博文

BTMA--Development History of Henan Benteng Machinery Equipment Co., Ltd.

  Henan Benteng Machinery Co., Ltd. is a well-known manufacturer and joint-stock enterprise with import and export rights. It mainly produces large and medium-sized mining machinery and other equipment. Our fixed assets are RMB 80,000,000, we have four subsidiaries and one R&D department. Product quality is the life of our company, and all our products have passed the ISO9001: 2000 quality system certification. In addition, high-quality after-sales service continues to ensure high quality.  In addition, we have a group of experienced and excellent after-sales service personnel to provide tracking services to customers around the world. The needs of customers are what we strive to create. Customer satisfaction is what we are after. For decades, Benteng people have continued to create, surpass themselves, and adhere to the concept of "development is the last word". Develop brand with quality. Enhance the brand with service. We Benteng people are determined to forge ahead
2 条评论
阅读全文

BTMA-The necessary conditions to ensure the operation of the crusher

People in the industry are very aware that crushers often work under heavy load conditions and in harsh dusty environments. In order to ensure the performance and reliability of the crusher during operation, each type of crusher must meet the following requirements:   1. The transmission device of the crusher , the feeding port and the discharging port must have protective devices 2. The crusher must have a reliable dustproof device and dust removal device 3. Ballast breaking machines should be equipped with simple and safe safety devices 4. The structure of the crusher should ensure that all its worn parts, especially the crushing parts, can be replaced quickly and easily. The number of these parts should be kept small, the weight of each part should not be too large, and the shape should be as easy as possible for manufacturing and maintenance.
2 条评论
阅读全文

BTMA--Analysis and research on the crushing mode of the crusher

Although the crusher is a practical machine, thinking about its crushing method is still very valuable. Based on years of working experience, the author summarizes as follows: 1. Crushing: The ore is placed between two crushing surfaces, and after pressure is applied, the ore is crushed due to the compressive stress reaching the limit of its compressive strength. 2. Splitting ballast: When squeezing the ore with a flat surface and a working surface with a sharp shuttle, the ore will split along the direction of the pressure line of action. The cause of splitting is due to the tensile stress on the splitting plane reaching or exceeding the tensile strength limit of the ore. The tensile strength limit of ore is much smaller than the compressive strength limit. 3. Fracture: The ore is damaged by bending. The crushed ore is a beam with two or more fulcrums bearing concentrated loads. When the bending stress in the ore reaches the bending strength limit of the ore, the ore is broken. 4.
2 条评论
阅读全文