Shanxi chemical companies are vigorously adopting new technologies to carry out energy-saving technological transformations and achieved significant results. In the first quarter of this year, the energy consumption of the industrial added value of the chemical industry in the province dropped…

Problems with frosting behind expansion valves in environmental chambers
1. Someone will first consider whether the expansion valve is blocked or the opening of the expansion valve is too small.
2. Still some people will consider whether the fan is faulty.
3. Of course, some …

Determine the type of cable

The type of cable should be determined according to the application system included in the integrated cabling system. For computer networks and telephone voice systems, 4 pairs of twisted pair cables can be preferentially selected. For hig…

“Nanhai No. 1” is about 7 meters long, will there be a major change in the salvage plan? A few days ago, the reporter interviewed Wang Renyi, the deputy commander of th…

Although Volvo’s joint venture project in Jinan, Jinan Huawo Truck Co., Ltd. (hereinafter referred to as “Hua Wo Truck”) has not produced as expected since 2004, Fredrik Hogberg, president of Volvo China, talked about it on the 2nd. It is still said that the Huawo truck…

In the report on the National Economic Situation in 2006 and the Draft National Economic Development Plan for 2006 reviewed by the deputies to the 5th National People's Congress, the National Development and Reform Commission will focus on energy conservation and emission reduction, and st…

With the development of social economy, the development of China's textile industry is entering the spurt stage; the upgrading of various textile equipment has brought unprecedented opportunities for textile machinery manufacturing enterprises. Recently, Zhongda Dentsu Jin…

For long-term storage of construction machinery, the following points must be achieved: (1) It should be parked in a dry room. If you have to stop outside, you should choose a flat floor and put wood. Cover it with a cover after parking.
(2) Before long-term storage, the machinery mus…

1 Introduction

Fire pump is the core component of the impeller, impeller design is related to the overall performance and service life of the machine. However, impeller hydraulic design requires a large number of complex calculations, comparison and repeated modifications, heavy wor…