What is a hydraulic power system?

1. What is a hydraulic power system?

A hydraulic system is a complete device that uses oil as the working medium, uses the pressure energy of the oil and manipulates the hydraulic actuator through control valves and other accessories, including power elements, actuators, control elements, auxiliary elements (accessories) and hydraulic oil. The output characteristics of the prime mover are often not ideally matched to the requirements of the actuator (force, speed, displacement). Therefore, some kind of transmission device is needed to transform the output of the prime mover appropriately so that it meets the requirements of the working mechanism. A hydraulic system is a device that uses the hydraulic principle to achieve this transformation function.

Hydraulic system is a hydraulic source device or a hydraulic device including control valves, which is composed of hydraulic pump, motor for driving, oil tank, directional valve, throttle valve, relief valve and so on. According to the flow direction, pressure and flow rate required by the driving device, it is applicable to various kinds of machinery where the driving device is separated from the hydraulic station, and the hydraulic station is connected to the driving device (cylinder or motor) with oil pipes, and the hydraulic system can realize various prescribed actions.

Hydraulic station is also called hydraulic pumping station, the motor drives the oil pump to rotate, the pump sucks oil from the tank and then plays oil, converting mechanical energy into hydraulic oil pressure energy, hydraulic oil through the integrated block (or valve combination) by the hydraulic valve to achieve the direction, pressure, flow rate adjustment after the external pipeline transmission to the hydraulic machinery cylinder or oil motor, so as to control the transformation of the direction of the hydraulic machine, the size of the force and the speed of the speed, to promote a variety of hydraulic machinery to do work.

The hydraulic station is an independent hydraulic device, which supplies oil according to the requirements of the driving device (host) and controls the direction, pressure and flow of oil flow, which is applicable to various hydraulic machinery under which the host and the hydraulic device can be separated, driven by the motor to rotate the oil pump, the pump sucks oil from the tank and then plays oil, converting mechanical energy into hydraulic oil pressure energy.

2. The points and disadvantages of hydraulic power system?

Advantages of hydraulic pressure.

1、The various components of hydraulic transmission can be easily and flexibly arranged according to the needs.

2, light weight, small size, small inertia of movement, fast response time .

3, easy to manipulate and control, can achieve a wide range of stepless speed regulation (speed range up to 2000:1).

4, can automatically achieve overload protection.

5、Usually use mineral oil as working medium, the relative moving surface can be self-lubricated, long service life.

6、It is easy to realize linear motion.

7, it is easy to realize the automation of the machine, when using electro-hydraulic joint control, not only can realize a higher degree of automatic control process, but also can realize remote control.

Disadvantages of hydraulic pressure.

1、The efficiency is low because of the resistance of fluid flow and leakage is large. If not handled properly, leaks not only pollute the site, but also may cause fire and explosion accidents.

2、Since the working performance is easily affected by temperature changes, it is not suitable to work under very high or low temperature conditions.

3、The manufacturing precision of hydraulic components is required to be high, thus more expensive.

4, because of the liquid medium leakage and compressibility, can not get strict transmission ratio.

5, hydraulic transmission failure is not easy to find the cause; use and maintenance requires a high level of technology.

3. hydraulic power system consists of which parts?

1, power components, namely, hydraulic pump, its function is to convert the mechanical energy of the prime mover into liquid pressure kinetic energy (expressed as pressure, flow), its role is to provide pressure oil for the hydraulic system, is the power source of the system.

2, the implementation of components, refers to the hydraulic cylinder or hydraulic motor, its function is to convert the hydraulic energy into mechanical energy and external work, hydraulic cylinder can drive the work mechanism to achieve reciprocal linear motion (or swing), hydraulic motor can complete the rotary motion.

3, control components, refers to a variety of valves using these components can control and adjust the hydraulic system in the liquid pressure, flow and direction, etc., to ensure that the implementation of the components can work in accordance with the requirements of people expected.

4, auxiliary components, including oil tanks, oil filters, pipelines and joints, coolers, pressure gauges, etc.. Their role is to provide the necessary conditions for the system to work properly and facilitate monitoring and control.

5, the working medium, that is, the transmission fluid, usually called hydraulic oil. Hydraulic system is through the working medium to achieve movement and power transmission, in addition, hydraulic oil can also play a lubricating role in the mutual movement of hydraulic components.

4. Hydraulic power system application areas?

Hydraulic system has a wide range of applications in the following scenarios, mainly in construction machinery and metallurgical machinery, etc.

(1) Construction machinery

Construction machinery accounts for a relatively large share of hydraulic products, accounting for 43.1% of total industry sales, and the proportion is still expanding. Each year for the overseas production of excavators, road machinery, construction machinery, piling machinery, mixer trucks and other complete sets of imported hydraulic parts reached about 150 million U.S. dollars or more.

(2) machine tools

Machine tools require a large number of high-pressure, high-flow plunger pumps, cartridge valves, stacked valves, solenoid valves, proportional valves, servo valves, low-noise vane pumps and light piston pumps and other liquid and gas-tight components products. The hydraulic system is widely used in the clamping of machine tools and workpieces, the movement of the table and other occasions. With the progress of manufacturing technology, the domestic high-precision, high-efficiency, automated machine tools, especially the increasing demand for CNC machine tools

(3) automotive manufacturing

Automotive and motorcycle products need a large number of steering power pump, automatic transmission with hydraulic control components, various types of seals and pneumatic components; automotive manufacturing equipment requires a variety of pumps, hydraulic solenoid valves, valves, air source processing devices, a variety of cylinder proportional valves, gear pumps, cylinders and control valves for heavy vehicles.

(4) metallurgical machinery

It is understood that the use of hydraulic start in metallurgical equipment reached 6.1% to 8.1%, accounting for about 10% of the cost, therefore, the transformation and development of the metallurgical industry for hydraulic pneumatic seals products provide a large market space. Analysis from industry statistics, hydraulic, pneumatic products for the metallurgical industry directly provide supporting parts accounted for 14.5% and 9% of sales, respectively. In addition, metallurgy, mining equipment needs a large number of various types of piston pumps, cartridge valves, solenoid valves, proportional valves, servo valves, cylinders, hydraulic system assemblies and pneumatic components.

(5) hydraulic test bench

Hydraulic technology needs continuous development, innovation, each year, a number of hydraulic test bench to test, which is also a field of application of hydraulic technology.

(6) Weapons and equipment

Modern weapons and equipment, especially now large weapons, can not be separated from the hydraulic transmission. Modern weaponry hydraulic system maintenance and protection has become one of the important research topics of our military, it is an important test of our military equipment maintenance personnel, but also to improve the life of our fighters and weapons important guarantee. In particular, the rise of current change, magnetic flow technology and its application.