Compared with frequency conversion technology, the research of hydraulic drive technology started early and is more thorough. The starting and accelerating impact of hydraulic drive is small, the flexibility is good, and the system always runs in a relatively stable state. Yimin open-pit mine self-moving crusher, as an important part of the semi-continuous system of Yimin open-pit mine, was introduced from Germany in 2007. The coal feeding system of the crusher is an apron feeder for sale, the driving mode is hydraulic drive, the rated working speed is 0.5ms, the maximum working speed is 0.6ms. The driving part adopts the variable pump - quantitative motor volume speed regulation, closed hydraulic system. Volumetric speed regulation adjusts the speed of the actuator of the hydraulic motor by changing the displacement of the hydraulic pump. Since there is no throttling loss or overflow loss, the loop efficiency is high and the temperature rise of the system is small, which is suitable for high-speed and high-power speed regulation system. The system schematic diagram is shown in Figure 1. 1.1 Drive unit The drive unit consists of two vertical motors and a growth gear box, which is equipped with a cooling device. When the system is running, the gear oil circulates between the gearbox and the radiator. The gear box oil circulation pipeline is provided with a pressure sensor, used to ensure sufficient oil in the gear box, according to the design requirements, the pressure should not be less than 0.2MPa.
Apron feeder for sale hydraulic transmission system is a widely used power transmission device in construction machinery. However, due to the complexity of the system and the working environment and many other factors, the hydraulic transmission system will often appear some failures. This paper will start from the common failure, analysis of the hydraulic transmission system failure reasons and solutions. The leakage of hydraulic system is one of the most obvious problems, which can easily lead to the decrease of system pressure and the heavy operation handle, and even endanger the safety of the machine. Leakage problems are usually divided into the following two types: 1. Internal leakage: Internal leakage refers to the amount of fluid lost in the system, such as oil leakage in pumps, valves, seals and other components. In general, the reasons for internal leakage are as follows: (1) improper oil viscosity leads to leakage. If the oil viscosity is too low, it will lead to increased leakage; otherwise, it will increase the resistance of the system and affect the efficiency of the machine.
(2)Apron feeder for sale sealing body aging, wear and tear lead to leakage. Sealing body aging and wear are also the main causes of internal leakage. (3) Improper installation leads to leakage. Such as improper joint fastening, sealing ring, etc., these installation errors will lead to leakage. (1) The pipe joint is not tight. Pipe connection is not tight is also one of the main reasons for external leakage, under normal circumstances can be used to tighten the joint with a wrench or wrench spindle to solve. (2) Oil tank bulge leads to leakage. Tank bulges can cause the tank to become less airtight, so they need to be replaced or repaired promptly to reduce leakage.
