Spring ploughing arrives, how to operate the tractor strong pressure type hydraulic? Master the skills of use, spring ploughing and autumn harvest, work without panic

Release time：2023-05-27    Click：179

Recently, some users left messages hoping that the agricultural machinery guide can introduce the strong pressure hydraulic system of the tractor, popularize science, we will explain the largest amount of strong pressure hydraulic system in the current large and medium-sized tractor market in several issues, hoping to further understand the strong pressure hydraulic system of the tractor and can play a beneficial role in the correct operation in spring ploughing.

The hydraulic suspension system of the tractor is mainly composed of three major components: cylinder, pump and valve, here the cylinder refers to the cylinder, the pump refers to the hydraulic pump (commonly used gear pump), the valve refers to the distributor or multi-way valve, according to the cylinder, pump, valve these three components in the hydraulic system position arrangement and combination of different ways, often the hydraulic system is divided into three categories: discrete hydraulic system, semi-discrete hydraulic system and integral hydraulic system.

The split hydraulic system is the high-pressure hydraulic system we are going to talk about today, using a high-pressure distributor. Strong pressure hydraulic system is currently the most widely used hydraulic system in domestic medium and high horsepower tractors, the oil cylinder on the tractor uses double-acting cylinders, strong pressure distributors or integrated multi-way valves, cylinders, gear pumps, distributors, and oil tanks are installed in different positions, connected to each other with oil pipes.

The distributor controller handle of the strong pressure hydraulic system generally has four positions, namely: lifting, neutral, pressure drop, floating, the function of the pressure drop position is the so-called strong pressure function, when the control handle is moved to the pressure drop position, the upper cavity of the double-acting lifting cylinder oil intake, the lower cavity oil return, agricultural tools under the action of pressure oil fall, forced agricultural tools to fall, plow, rotary cultivator and other agricultural tools into the soil performance is very good, some new users just use the strong pressure system when the operation is not skilled, In use, there will even be agricultural tools under strong pressure to lift the rear wheel of the tractor, the tractor can not move forward, what's more, users also complain about this, making people cry and laugh, but also from another side reflects that the strong pressure operating system does have some insurmountable defects.

The strong pressure distributor is not positioned in the pressure drop position, that is, when you move the handle to the pressure drop position, the tractor fixture drops, and when your hand is released, the handle will automatically return to the neutral position, and it cannot be automatically maintained in the pressure drop position. The pressure drop position can not be located is not the fault of the strong pressure distributor, but the design is like this, which is actually a self-protection function of the tractor, but also convenient to operate, otherwise, the tractor mentioned above in use The rear wheel is pushed off the ground, the phenomenon that the tractor can not walk may increase significantly. The remaining three positions of the strong pressure distributor joystick: lifting, neutral, floating have positioning function, the handle can be positioned in this position after the hand is released, wherein it has the function of automatic reset at the end of lifting when lifting the position, that is, after the agricultural tool is lifted to the highest position, the joystick can automatically jump back to the neutral position, and the floating position and neutral position when the handle is not automatically jumping function.

Strong pressure hydraulic system because of its components using a split structure, easy to arrange, can easily use double cylinder to improve the lifting capacity, while hydraulic components are more convenient for professional mass production, strong versatility, hydraulic components fault easy to check, maintenance is convenient, favored by domestic tractors, at present domestic large and medium horsepower tractors mostly use mechanical strong pressure hydraulic system. The semi-discrete hydraulic system of the mechanical non-strong pressure system, the integral hydraulic system is relatively rare, although the electro-hydraulic integrated electronically controlled hydraulic control system has been promoted for many years, but due to many failures, unstable quality, high price, has not been recognized by the market, is still in the promotion trial stage, the number is very small. However, as the future development direction of tractor hydraulics, all manufacturers should do a good job in technical reserves, continue to adhere to the market launch, gradually accumulate experience, continue to improve, constantly improve, improve the reliability of their work, and ensure product quality.

In the use of tractors, whether it is a strong pressure system or a non-strong pressure system is good, in fact, it has been controversial, and the strong pressure system has been criticized in the market, and many users have actively changed it to a non-strong pressure type after buying a strong pressure tractor. In fact, the change is also very simple, connect the upper cavity oil pipe of the double-acting hydraulic cylinder with the oil tank, so that the oil in the upper cavity of the cylinder flows directly back to the oil tank, and then the strong pressure effect of the tractor disappears. Tractor manufacturers are also keeping pace with the times, in order to adapt to market demand, this function is also installed on the tractor leaving the factory, a tubing is connected to the oil tank on the upper cavity oil pipe of the tractor double-acting cylinder, and a control valve is installed, manually controlled with the handle, when the handle is moved to the closed position, the upper cavity oil circuit of the double-acting cylinder is not connected with the tank, at this time the tractor has a strong pressure function; When the handle is moved to the position of continuous opening, the upper cavity oil circuit of the double-acting cylinder is connected with the oil tank, and the oil is directly returned to the oil tank, and the tractor does not have a strong pressure function.