Classification and function of fire control valve

2022-07-25
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The classification and function of control valve in hydraulic transmission system

in hydraulic transmission, the hydraulic cylinder is the simplest and most complete hydraulic transmission system for us. By analyzing its working process, we can clearly understand the basic principle of hydraulic transmission

the hydraulic system is mainly composed of five parts: power element (oil pump), actuating element (oil cylinder or hydraulic motor), control element (various valves), auxiliary element and working medium

1. Advantages of hydraulic transmission

(1) small volume and light weight, so the inertia force is small. When suddenly overloaded or stopped, there will be no big impact

(2) it can smoothly and automatically adjust the traction speed within a given range and realize stepless speed regulation

(3) the commutation is easy. Without changing the rotation direction of the motor, the conversion between the rotation of the working mechanism and the linear reciprocating motion can be easily realized by sliding friction

(4) the hydraulic pump and the hydraulic motor are connected by oil pipes, and the spatial arrangement is not strictly limited to each other

(5) due to the use of oil as the working medium, the components can self lubricate relative to the moving surface, with small wear and long service life

(6) simple operation and control with high degree of automation

(7) it is easy to realize overload protection

2. Disadvantages of hydraulic transmission

(1) the use of hydraulic transmission has high requirements for maintenance, and the working oil should always be kept clean to help everyone further understand the cleanliness of equipment

(2) high manufacturing precision, complex process and high cost for hydraulic components

(3) the maintenance of hydraulic components is complex and requires a high technical level

(4) using oil as the working medium, there is a fire hazard in the working face from the original single tension and compression test to a variety of experimental characteristic tests

(5) low transmission efficiency

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