There are many sliding friction pairs in the hydraulic excavator. Because the sliding friction pairs of the excavator bear heavy loads and the working conditions are relatively bad, the relative sliding friction pairs are easy to fail. However, most of the failures are not fractures, but d…

China's pesticide residue detection technology started late. At present, most commonly used residue detection methods are traditional analysis methods. This method has the solvent extraction method used is time-consuming, laborious, and easy to pollute the environment; detection …

Valve production is a complex and simple process, the production of ordinary valves such as gate valve, ball valve, butterfly valve production cycle is generally three days, the production of good valves must go through a variety of performance tests, one of the most important test is Pres…

Steam jet vacuum pump has a large volume of exhaust gas, a wide range of work, a simple structure, and no parts w…

The Fifth Plenary Session of the 18th CPC Central Committee summarized the achievements and insufficiency of China's economic and social development during the "12th Five-Year Plan" period. It discussed the principles and objectives of the "13th Five-Year Plan" period an…

In October 2015, the China Petroleum and Chemical Industry Federation released the 2015 “China Petroleum and Chemical Industry Technology Innovation Demonstration Enterprise” list. A total of 10 companies in the country were awarded the honorary title of “Outstandin…

Jiangsu Electric Engineering Volume Flow Centrifugal Hollow Machine Constant Pressure When Flow Pressure Characteristic Curve 2.2 Air Compressor Throttle Surge Centrifugal Hollow Machine Import Pressure Change Flow Pressure Characteristics As shown, when the air compressor inlet door is f…

Refrigerated trucks are key equipment in an important part of low-temperature cold chain logistics. Refrigerated trucks work reliably in the transport proc…

The active car-making movement of Internet companies around the world is on the rise. For traditional auto companies, this pressure is self-evident. With the trend of this Internet-made car, many startups of automotive technology have emerged. This wave of Internet-made cars is a par…

Douhe Power Plant, Tangshan 063028, China; North China Electric Power Research Institute Co., Ltd., Beijing 100045, China; Harbin Institute of Large Electric Machinery, Harbin 150040, China) The practical significance of the application of on-line vibration monitoring devices for motor st…

First, the internal circulation switch is closed for a long time, which causes the cooling effect to decrease.

The following figure shows the inner cycle switch. If the owner accidentally turns off the internal circulation switch, it means that the air conditioner enters the exte…

Cast iron ball valve used in working temperature ≤150 ℃ of water, steam and other non-corrosive media pipeline, for opening and closing with; its biggest advantage for quick opening and closing. In addition, what are the advantages of it? Xiao Bian today introduced you to the a…