Shaft forgings should choose different materials and adopt different heat treatment specifications (such as quenching and tempering, normalizing, quenching, etc.) according to different working conditions and use requirements, in order to obtain certain strength, toughness and wear resistance.

45 steel is a commonly used material for shaft forgings. It is cheap and can obtain better cutting performance after quenching and tempering (or normalizing), and can obtain comprehensive mechanical properties such as higher strength and toughness. The surface hardness after quenching can be improved. Up to 45~52HRC.

Alloy structural steel such as 40Cr is suitable for shaft forgings with medium precision and high rotational speed. This kind of steel has good comprehensive mechanical properties after quenching and tempering.

Bearing steel GCr15 and spring steel 65Mn, after quenching and tempering and surface high-frequency quenching. The surface hardness can reach 50~58HRC and has high fatigue resistance and good wear resistance, and can manufacture high-precision shafts.

38CrMoAIA nitrided steel can be used for the main shaft of precision machine tools (such as the grinding wheel shaft of grinding machine and the main shaft of coordinate boring machine). After quenching and tempering and surface nitriding, this kind of steel can not only obtain high surface hardness, but also maintain a soft core, so it has good impact resistance and toughness. Compared with carburizing and quenching steel, it has the characteristics of small heat treatment deformation and higher hardness.

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More detailed information about the technical requirements of shaft forgings can be accessed by clicking:https://www.gold-emperor.com/technical-requirements-for-forged-shaft-forgings/

Thin-walled crossed roller bearings are composed of crossed cylindrical roller bearings and crossed tapered roller bearings. Due to their particularity and incomparable advantages over other bearings, they are widely used, and some damages will inevitably occur in the use engineering , so what are the damage forms of thin-walled cross rollers?

Surface wear and peeling of rolling elements (balls and balls, etc.) and inner and outer ring raceways:

This will cause the radial clearance and axial clearance of the thin-walled crossed roller bearing to increase, the thin-walled crossed roller bearing will emit noise and heat during operation, and change the correct working position of the mating shaft, resulting in vibration. The initial stage of surface fatigue spalling is pitting on the surface, which develops into flaky surface exfoliation. Both the rolling elements of the bearing and the raceway surfaces of the inner and outer rings are subjected to periodic pulsating loads, resulting in periodically changing contact stress.

When the number of stress cycles reaches a certain number, fatigue spalling occurs on the working surface of the rolling elements or inner and outer ring raceways. If the load of the bearing is too large, this fatigue will be exacerbated. In addition, if the bearing is installed incorrectly and the shaft is bent, the raceway will also peel off. The fatigue spalling of the bearing raceway will reduce the running accuracy of the shaft and generate vibration and noise.

Wear of mating surfaces of inner and outer rings:

This is because the inner and outer rings of the thin-walled crossed roller bearing are not assembled with the shaft and the housing hole, which destroys the matching relationship between the bearing and the housing, the bearing and the shaft, and further accelerates the matching between the bearing itself and the shaft or housing that matches it. Surface wear (commonly known as the inner or outer ring of the shaft).

Spacer wear and looseness:

During work, the isolation ring and the rolling elements (balls, rollers, etc.) rub against each other, and if the lubrication is poor, the wear will be accelerated. After the isolation ring is worn, the rolling elements will loosen, and in severe cases, the isolation ring will fall apart and the rolling elements will fall off.

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More detailed information about the damage forms of thin-walled crossed roller bearings can be accessed by clicking:https://www.prsbearings.com/a/news/damage-forms-of-thin-walled-crossed-roller-bearings.html

The grow rack technology provides convenience for plant lovers, but the temperature and humidity control of the grow rack is particularly important for plants. Too high or too low temperature and humidity will affect the planting quality and even cause diseases and insect pests. If some effective measures can be taken to make the ventilation and cooling effect of the grow rack better, and at the same time reduce its operating cost, the ventilation system will become a link that consumes a lot of energy for the grow rack.

How to control the temperature of the grow rack?

It is mainly adjusted by means of ventilation and heating, that is, a ventilation system, to ensure the necessary ambient temperature required for the growth of plants. The cooling of the grow rack is mainly through the exchange of air inside and outside the frame, and ventilation to adjust the internal temperature.

Fan forced cooling system is the best cost-effective

When choosing an evaporative cooling method (wet pad-fan cooling system, spray humidification and cooling system), it is necessary to make a technical and economic comparison of the “one-time investment and operating costs” of each plan, and minimize the total cost as the goal of the optimization plan. At present, the fan forced cooling system has become the most widely used ventilation and cooling system. This system is combined with a special axial flow fan for the greenhouse and a wet curtain, and the ventilation is fast and the temperature is cooled very quickly. After many experiments, it has been shown that the fan forced cooling system has become a cost-effective ventilation and cooling solution with good cooling effect and low cost.

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For more detailed information about grow rack ventilation solutions, please click to visit: https://www.etegreen.com/blog/grow-rack-ventilation-solutions/

With the further development of the industry, the lime deep processing industry has a broad market prospect, and the professional lime deep processing production line is the equipment that helps the industry create value. Professional calcium hydroxide production line equipment, with the advantages of high efficiency and high output, environmental protection and noise reduction, helps calcium hydroxide grinding projects to create value.

So, what is the price of calcium hydroxide equipment? In fact, regarding the price of a complete set of calcium hydroxide production line, users first need to learn how to select equipment. Different project requirements have different matching production line plans. Therefore, the price of a complete set of calcium hydroxide production line will also vary.

The calcium hydroxide production line mainly includes a calcium hydroxide digestion system, a mill, a series of fine powder separators, and an integrated grinding system. Among them, the digestive system is an intelligent water distribution system, which adopts a dual dust removal system of pulse bag filter and water dust removal to achieve efficient dust removal. Rapid hot water ash can speed up digestion and milling rate. The pulverizer is a large-scale grinding equipment, which can be reused, improved efficiency, and reduced costs. The fine air separator has high powder selection and cleanliness, and the energy saving effect is remarkable, which can greatly improve the output and whiteness of the mill system.

The digester system is mainly a device for digesting quicklime into slaked lime powder, and can also digest quicklime into lime milk. The main principle of the slaked lime digester is that after the spraying device sprays water to the quicklime in the digester according to a certain amount of water supply, the quicklime is strongly stirred in the mixing tank by the rotation of the wear-resistant stirring blade and gradually melted, digested, matured, Homogenization. Digester has the following industry advantages.

1. Precise water distribution system

This system will carry out computerized precise water distribution according to the specific gravity of quicklime entering, which completely solves the problem of continuous water distribution by the water distribution valve under the conditions of uneven feeding, intermittent feeding, and stop feeding.

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For more detailed information about the price of calcium hydroxide production line, please click to visit：https://www.ly-gaifeng.com/blog/calcium-hydroxide-production-line-price.html

The hammer head of the crusher is an important part to ensure the normal production of ore materials. It not only affects the output of sand and gravel aggregates, but also affects the quality of finished products. Many users are deeply troubled by the serious wear of the hammer head. So how to deal with it? In response to this problem, the crusher manufacturer gave us a detailed introduction.

Why choose a crusher with a hammer head

There are so many types of crushers on the market, including crushers with hammers and crushers without hammers. Some people say that since the hammer head is often worn, it is better to choose a crusher without a hammer head. In fact, although hammer crushers have the trouble of wear and tear, other crushers also have wearing parts, but they are not hammer heads.

Common crushers with hammers on the market include: impact crushers, hammer crushers, fine crushers, vertical compound crushers, etc. This kind of crusher with a hammer is generally an impact crusher. The aggregate produced has a better particle size and will be broken along the gaps in the ore. There are few cracks in the particles. The finished product is often cubic and has a high degree of gradation. Therefore, Many people will choose this kind of impact crusher with hammer head.

Reasons and solutions for the serious wear of the hammer head of the crusher

In order to solve the problem of serious wear of the hammer head of the crusher, it is necessary to find out the cause of the serious wear of the hammer head of the crusher and prescribe the right medicine. The main reasons for the serious wear of the hammer head of the crusher are the material of the hammer head, the manufacturing quality and structural design, the technical design of the crusher, the feeding situation and the clearance of each part of the structure.

Reason 1. Hammer head material

The hardness and toughness of the hammer head are one of the reasons that affect the wear of the hammer head. Generally, the greater the hardness, the greater the wear resistance of the hammer head, but as the hardness increases, the impact toughness of the hammer head will decrease. Therefore, the key to improving the wear resistance of the hammer head is to find a material with both hardness and good toughness.

Treatment method: choose the hammer head of high wear-resistant material, such as high manganese steel, high chromium cast iron, low carbon alloy steel, etc.

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For more detailed information about the solution to the serious wear of the hammer head of the crusher, please click to visit:https://www.zymining.com/blog/crusher-hammer-wear-treatment.html