Alternative automobile shock absorber extended from spring shock absorber
Many people say that spring shock absorber is a kind of automobile shock absorber. This kind of talk is true and wrong, mainly because the latter belongs to the former, but the former does not belong to the latter. Therefore, this sentence can be changed into that the automobile shock absorber is a spring shock absorber, and it is an alternative, because its shape is different from the ordinary one.
The spring damper is a mechanical element used to restrain the vibration and impact from the outside when the spring rebounds after vibration absorption.
Spring shock absorber can be divided into:
1. Double acting spring shock absorber is a shock absorber that can reduce vibration in both the tightening stroke and the recovery stroke;
2. One way acting spring damper is a damper that only works during the recovery stroke.
The structure of spring damper generally includes:
Piston rod - working cylinder - piston - stretching valve - oil reservoir - tightening valve - compensation valve - flow valve - guide seat - dust cover - oil seal - spring.

Personalized development trend of pneumatic butterfly valve
Stainless steel pneumatic butterfly valves have occupied a leading position in prosperous countries, accounting for up to 70%, while galvanized pneumatic butterfly valves are shrinking at an annual rate of 1% - 2%, and the proportion has now dropped to less than 30%. The pneumatic butterfly valve required for the production of complete machines in the domestic market has been greatly promoted, and China is increasingly becoming the main market for global hose consumption. The pneumatic butterfly valve industry must adapt to the new situation. New information integration, household appliances, mechanical equipment, etc. are emerging from time to time, bringing opportunities to the hose industry. The hose enterprises should adapt to the market transformation, do a good job in market operation, and from time to time launch products that comply with the requirements of different complete machines, so as to become more competent. The product is after China's participation in the WTO. The personalized development of pneumatic butterfly valves tends to meet the needs of people's lives. Today's mechanical products have entered an intelligent period. With the development of the sensor industry, the focus is on the new application of the Internet of Things. Secondly, household appliances products have been extended to frequency conversion and environmental friendly air conditioners, home theaters, accounting machines, and communication products, so the service objects (customers) will also be changed. In order to stabilize the achievements of the response to the financial crisis, China has implemented a prudent monetary policy, and has improved the bank reserve ratio for 12 consecutive times. This year, it has also improved the bank interest rate for two consecutive times. The reduction of credit scope has further increased the financing difficulty of small and medium-sized pneumatic butterfly valve enterprises, especially small and micro pneumatic butterfly valve enterprises, and the financing cost remains high.
At present, China's current financial system is difficult to deal with the "bottleneck" problem of small pneumatic butterfly valve enterprises with limited financing channels, small scope and high costs. The pneumatic butterfly valve industry is shifting from the traditional tool industry to the fashionable industry. Consumption is tending to be personalized, focusing on quality, reasonable price and more choices. Following the trend, pneumatic butterfly valve sales enterprises have no choice but to provide customers with creative tools to meet their personalized needs.