Slide valve 7 and steering screw 11

Slide valve 7 and steering screw 11 overall connection, with two thrust bearings at both ends. Since the length of slide valve 7 is slightly longer than the width of valve body 9, there is an axial clearance h between the end face of two thrust bearings and the valve body, so that slide valve and steering screw can move axially in the valve body. Return spring 10 has a certain pre-tightening force, push the two reaction plunger to both ends of the valve body, the stop ring at both ends of the sliding valve is just clamped in the outer end of the two reaction plunger, so that the sliding valve is always in the middle of the valve body when not rotating. There are two oil slots C and B on the slide valve and three oil slots A, D and E on the corresponding mating surface of the valve body. The oil pump 3 is driven by the engine through a belt or gear. The pressure oil flows through the tubing to the control valve and then through the control valve to the L and R cavities of the power cylinder..When the truck is traveling in a straight line, as shown in the picture. Wherein 1(a), slide valve 7 is in the middle position under the action of return spring 10 and reaction valve 8.. Both ends of the power cylinder 15 are connected to the return channel.. The oil output from the oil pump enters the annular groove a of the valve body 9 through the inlet 4, and then is divided into two ways: one is through the annular groove B and D, the other is through the annular groove C and E, C and E. Since slide valve 7 is in the middle position, the two kinds of oil flow back to the tank through the oil return port. The oil line in the whole system is connected, and the oil pressure is at low pressure.