What are the mechanical elements of a pressure relay in a hydraulic system? What are hydraulic compo

Working principle The pressure relay is a hydraulic and electrical conversion element that uses the pressure of a liquid to open and close the electrical contacts. When the system pressure reaches the set value of the pressure relay, an electrical signal is sent to make the electrical components (such as electromagnets. Motor.

Time relays. electromagnetic clutch, etc.) to relieve the pressure of the oil circuit. Commutation, the actuator realizes sequential action, or closes the motor to stop the system from working, and plays a role in safety protection.

Pressure relays are available in plunger type. Diaphragm. There are four structural forms: spring tube type and bellows type.

When the pressure of the liquid entering from the oil inlet at the lower end of the relay reaches the set pressure value, the plunger is pushed up, and this displacement is amplified by the lever and then the micro switch is pushed. By changing the amount of compression of the spring, the operating pressure of the relay can be adjusted. Note:

The pressure relay must be placed in a place where there is a significant change in pressure to output an electrical signal. If the pressure relay is placed on the oil return circuit, the pressure relay will not work because the oil return circuit is directly connected back to the oil tank, and the pressure does not change.

The hydraulic components are oil pipes, oil tanks, hydraulic pumps, hydraulic cylinders, oil inlet valves and oil outlet valves.

Mechanical components: common gears, racks, and other parts or components with specific functions. The hydraulic system is composed of five parts: power components (oil pump), actuators (cylinders or hydraulic motors), control elements (various valves), auxiliary components and working medium.

Classification of hydraulic components:

1. Power components: gear pumps, vane pumps, piston pumps, screw pumps, etc.;

2. Actuators: piston hydraulic cylinders, plunger hydraulic cylinders, swing hydraulic cylinders, combined hydraulic cylinders, etc.;

3. Hydraulic motors: gear hydraulic motors, vane hydraulic motors, plunger hydraulic motors, etc.;

4. Control components: directional control valves: check valves, reversing valves, etc.;

5. Pressure control valves: relief valves, pressure reducing valves, sequential valves, pressure relays, etc.;

6. Flow control valves: throttle valves, speed control valves, diverter valves, etc.;

7. Auxiliary components: accumulators, filters, coolers, heaters, oil pipes, pipe joints, oil tanks, pressure gauges, flow meters, sealing devices, etc.

Answer: (1) The hydraulic control components include directional control valve, pressure control valve, and flow control valve. (2) The main role of the control element in the system:

Directional control valve: control the direction of fluid flow in the hydraulic system; Pressure control valve: in the hydraulic system, control the oil pressure; Flow Control Valves:

In hydraulic systems, the flow of oil is controlled.

The complete hydraulic system consists of five parts, namely power components, actuator elements, control components, auxiliary components, and hydraulic oil. The function of the power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid, which refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system.

In a hydraulic transmission system, the power components are hydraulic pumps, actuators, and hydraulic cylinders.

The hydraulic system is mainly composed of: power components (oil pump) and actuators (oil cylinders.

or hydraulic motor), control elements (various valves), auxiliary components and working medium and other five parts of the beam is skillfully formed. 1. Power element (oil pump): Its function is to use the liquid to use the mechanical energy of the prime mover.

Converted into hydraulic energy; It is the power part in the hydraulic transmission. 2. Actuators (cylinders, hydraulic motors): It converts the hydraulic energy of the liquid into mechanical energy.

Among them, the oil cylinder does linear motion, and the motor does rotary motion. 3. Control components: including pressure valves, flow valves and directional valves.

Their function is to infinitely adjust the speed of the hydraulic motor according to the need, and to regulate and control the pressure, flow and flow direction of the working fluid in the hydraulic system. 4. Auxiliary components: other components other than the above three parts, including pressure gauges.

Oil filters, energy storage devices, coolers, pipe fittings and oil tanks, etc. Hope mine is helpful to you Cylinders, Oil Oak Sail Pumps & Motors Oil Pumps & Oil Motors! The oil pump converts the mechanical energy into hydraulic kinetic energy, and the oil motor converts the hydraulic kinetic energy into mechanical energy!

This is the power component in the hydraulic system! The pump is the power element that converts mechanical energy into hydraulic energy, and the cylinder and motor are the executive elements that convert hydraulic energy into mechanical energy. Valves are roughly divided into different types such as pressure valves, flow valves and directional valves

Pressure valves are subdivided into pressure reducing valves according to the different functions used.

If the pressure of a certain circuit needs to be controlled, the pressure reducing valve is used to control), relief valve (mostly used at the outlet of the pump to play a role in safety protection), etc.; Flow valves are divided into speed control valves and throttle valves.

etc., mainly to control the speed of the cylinder and motor; Directional valves are used to control the direction of movement of the actuator. Sensors are divided into pressure, temperature, position, etc., and can be selected according to the usage requirements @2019

1. The executive element of the hydraulic system is a hydraulic cylinder or a hydraulic motor.

2. The function of the hydraulic system is to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely power components, actuators, control elements, auxiliary components (accessories) and hydraulic oil. Hydraulic systems can be divided into two categories:

Hydraulic transmission system and hydraulic control system. The hydraulic transmission system takes power transmission and movement as its main function. The hydraulic control system should make the output of the hydraulic search system meet specific performance requirements (especially dynamic performance), and the hydraulic system usually refers to the hydraulic transmission system.