Home > News > Content

Road Roller Hydraulic Part

AKW GROUP | Updated: Oct 26, 2017

The hydraulic part of the roller

1) Power components - the mechanical energy into liquid pressure energy components, the most common is the hydraulic pump.

2) Actuator - the hydraulic pressure of the liquid can be converted into mechanical energy of the hydraulic components, in the hydraulic system is common for the linear reciprocating hydraulic cylinder or for the rotary motion of the hydraulic motor.

3) Control elements - Components that control or regulate the pressure, flow and direction of the hydraulic system. Such as one-way valve, valve, relief valve and so on.

4) auxiliary components - in addition to the above three parts of the other components, including pressure gauges, oil filters, energy storage devices, coolers, pipe fittings, fuel tanks and so on.

5) working medium - used to drive the power and movement of the working medium, that is, hydraulic oil.

Summary of Hydraulic System of Roller

A complete hydraulic drive system consists of:

1. Hydraulic power element: the mechanical energy of the prime mover is converted into liquid pressure energy components, its role is to provide pressure to the hydraulic system oil

, The hydraulic pump is the heart of the hydraulic system.

2. Actuator components: the liquid pressure can be converted into mechanical energy to drive the components of the working mechanism, the implementation of components, including hydraulic cylinders and hydraulic motors

3. Control components: including pressure, direction, flow control valve, is the system of oil pressure, flow, direction control and regulation of the components.

4. Auxiliary elements: auxiliary components, such as pipes, pipe joints, fuel tanks, oil filters, etc. as auxiliary components.

5. Working medium: hydraulic oil, is the carrier of power transmission. Hydraulic drive system: open, closed hydraulic system by the oil cycle of different ways, can be divided into open system and closed system.

Open system: hydraulic pump directly from the tank to draw oil, the valve and the implementation of the valve

Row of institutions and filters and then flow back to the tank system. There is no doubt that the filter installation location example is an open system.

Open system features: working oil can be cooled in the tank and separation, precipitation and then enter the working cycle of impurities, the other open system of oil temperature is also easy to control,

Is conducive to extend the life of hydraulic oil. On the other hand, open system, due to oil and air contact, impurities, air, water and other easy access to the system, resulting in uneven movement of the work mechanism and other adverse consequences. In the construction machinery, the open system is mainly used for auxiliary drive. In the slow walking excavator and rotary drilling rig is also used for walking drive, in order to ensure the stability of the drive, often set in the loop back pressure valve.

Closed system: the oil pump output directly into the implementation of the oil, the implementation of the components of the oil and the hydraulic pump suction port directly connected to the working fluid in the system pipeline closed loop.

The advantages of the closed system: 1, the charge system in addition to the main pump in the displacement of the displacement to ensure that the corresponding capacity of the drive to improve the system's operating frequency, but also increase the main pump into the port pressure to prevent large flow generated Cavitation, to improve the pump speed and transmission power density; 2, only a small amount of oil from the tank in the cycle, the fuel tank is small; 3, the transmission symmetrical and smooth transition; 4, speed accurate, Able to use the engine to achieve anti-drag brake.

Closed system shortcomings: oil temperature is higher than the open system, oil life is shortened; the main oil circuit cleanliness is difficult to control.