What do you know about the spring pneumatic butterfly valve on the car??
What do you know about the spring pneumatic butterfly valve on the car?
1、 Introduction
The pneumatic butterfly valve is mainly used to restrain the shock and impact from the road surface when the spring rebounds after shock absorption. When passing uneven roads, although the shock absorption spring can filter the vibration of the road, the spring itself will have reciprocating motion, and the pneumatic butterfly valve is used to restrain the spring jumping. If the pneumatic butterfly valve is too soft, the body will jump up and down. If the pneumatic butterfly valve is too hard, it will bring too much resistance. The barrier spring works normally. During the modification of the suspension system, the hard pneumatic butterfly valve should be matched with the hard spring, and the hardness of the spring is closely related to the vehicle weight. Therefore, the heavier vehicles usually use the hard pneumatic butterfly valve. The device connected with the shock inducing crankshaft is used to counteract the modified vibration of the crankshaft (that is, the crankshaft is twisted by the impact of cylinder ignition).
2、 Application
The pneumatic butterfly valve is not used to support the weight of the vehicle body, but to prevent the spring from bouncing after shock absorption and absorb the energy of road impact. If you drive a car with a broken shock absorber, you can experience the bounce of the car after every pothole and fluctuation, and the pneumatic butterfly valve is used to suppress this bounce. Without the pneumatic butterfly valve, it is impossible to control the rebound of the spring. When the car encounters a rough road surface, it will produce serious bounce. When the car bends, it will also lose the tire grip and tracking ability due to the vibration of the spring up and down. The most ideal situation is to use pneumatic butterfly valve to limit the spring bounce to about one time.
3、 Category
Pneumatic butterfly valves are mainly divided into hydraulic and pneumatic ones from the perspective of damping materials, and there is also a pneumatic butterfly valve with variable damping.
The commonly used pneumatic butterfly valves are: spring pneumatic butterfly valve, air pneumatic butterfly valve, oil air pneumatic butterfly valve, all oil hydraulic pneumatic butterfly valve and rubber pneumatic butterfly valve.
4、 Purpose
It can be used for vibration reduction and vibration prevention of fans, water pumps, generator sets, air compressors, air conditioning hosts, cooling towers, transformers and other mechanical equipment.

In order to solve the problem of open laying of steam pipeline, the presentation of directly buried steam pipeline product technology has solved the problem of open laying of urban steam pipeline. The central problem of steam direct burial technology is still the problem of pipeline thermal compensation. Natural compensation or gate type compensation is difficult to implement due to the dense vertical and horizontal open pipe network of urban roads. If the rotary compensator is used in the open layout, which occupies a large open space, it is arranged on the ground. The rotary compensator is arranged on the ground, which is not allowed by the urban planning and city appearance supervision; The bellows compensator overcomes the defects of the above two compensation methods, and has become the main advanced and reliable thermal compensation method for directly buried steam pipelines. According to the national standards for urban heat supply network design and construction, and the corrugated pipe compensator manufacturer's requirements for the layout of the corrugated pipe compensator, the layout of the corrugated pipe compensator can refer to the following layout criteria:
1 One end of bellows compensator shall be arranged close to the fixed point,
2. Before and after the fixed point, the bellows compensator shall be symmetrically arranged to reduce the thrust on the fixed point, The main purpose is to avoid the axial instability of bellows compensator caused by pipeline bending and radial offset. The specific layout of bellows compensation is shown in Figure 1. There is a continuous line between the two fixed points, and there should be no turning angle or slope change within 12m of the interval compensator, so as to avoid the generation of lateral force on the bellows compensator. Due to the thin pipe wall of the bellows compensator, its anti torque ability is poor, and it is very easy to lose stability, which will cause damage to the bellows compensator and affect the safe and economic operation of the steam pipeline.
4 The distance L between the two fixed points can be determined according to the compensation amount of the bellows compensator and the steam temperature, but it should not exceed the maximum compensation amount allowed by the bellows compensator, and a certain margin should be left. When the design is selected, the maximum compensation amount of the pipeline is only about 80% of the compensation amount of the bellows compensator, so as to ensure the service life and safe operation of the bellows compensator.