A convenient way to determine if the full hydraulic steering spring piece is broken
A simple method for judging whether the full hydraulic steering spring piece is broken â–¡ Liu Changyou Liu Weifeng Fang Xudong full hydraulic steering gear valve core and valve sleeve are connected with a pin, the upper position of the valve core and the valve sleeve are always open long slots, and their slots are installed 6 spring pieces, the valve core has a free rotation angle of 7.5* in the valve sleeve, and the spring piece plays a role in positioning the valve core (see the attached figure). When the steering wheel does not rotate, the valve core and the valve sleeve are under the elastic force of the spring piece, the valve core is in the middle position, and the oil supply to the steering cylinder is not communicated through the valve core and the valve sleeve, and the hydraulic Pump supplies the oil of the steering gear. The liquid flows directly back to the hydraulic tank, and the steering system does not generate steering force; when the steering wheel is rotated 4*7.5* to the left or right, the spool overcomes the elastic force of the spring piece, eliminating the free angle, and the spool and the valve sleeve are left. Or the oil supply hole to the right communicates with the oil supplied from the hydraulic pump into the steering cylinder, and the steering system generates a steering force to the left or right. Continue to turn the steering wheel, the steering system continuously increases the steering force; stop turning the steering wheel, the valve core under the action of the spring piece, immediately eliminate the free rotation angle of the rotation back to the neutral position, close the communicating oil hole, and make the oil into the steering gear The liquid flows back to the hydraulic tank. The spring piece of the full hydraulic steering gear will be broken due to the wear and tear of normal use. Stopping the hydraulic pump to supply the oil to the steering wheel in the original position will also cause the spring piece to break or the elastic force to be weakened. When the spring piece is broken or the spring force is weakened, the valve core can no longer be positioned, even if it can no longer maintain the neutral position. Thus, the rotation of the steering wheel does not automatically eliminate the free angle of the valve plug and the valve sleeve, resulting in insufficient or no oil supply to the steering cylinder, so the steering is heavy and slow. When the spring pieces are not completely broken, there is a phenomenon that the steering is easy and the steering is heavy, and the damage of other parts in the steering system may also occur. It is usually determined by the fact that the spring piece is broken or the damage of other parts is heavy. The usual method is to remove the steering gear from the machine and disassemble it, and then find the cause, but this will cause a large amount of repair work and also cause a new steering gear failure. . A convenient way to determine whether the spring piece is broken is to stop the hydraulic pump from supplying oil, and slowly turn the steering wheel to the left or right by hand so that the angle of rotation is greater than 7.5*, then release the hand to see if the steering wheel can automatically return. If one side can automatically return to the neutral position, the spring piece that can automatically return to the other side has been broken. If both sides cannot automatically return to the neutral position, the spring pieces on both sides have been broken. The method of replacing the spring piece is to first close the switch of the hydraulic oil tank, remove the pressure gauge copper tube from the steering gear, and then disassemble the connection between the steering gear and the steering rod, wipe the surface of the steering gear, and connect the cross connecting block and the valve. Remove the cover and thrust bearing, and then clamp the flat square on the valve core with a hand tong. Pull the valve core and the valve sleeve while rotating, remove the broken spring piece, and install a new one. There are two methods: one method is to divide the spring piece into three pieces and make the two groups back to back, one end is fastened with a wire, and the other end is pinched by a hand clamp to the notch of the loading valve core and the valve sleeve, and then Cut the line and pull it out. Another method is to first install a set of spring pieces into the slot, the convex surface is toward the center of the valve core, and then the other spring piece convex surface is also mounted toward the center of the valve core, so that the two sets of springs are cycled. The film is finished. After loading the spring piece, hold the flat square on the valve core with a hand pliers, and apply the clean hydraulic oil to the outer surface of the valve sleeve. At this time, pay attention to keep the connecting shaft in the steering gear in the middle. In the upright position, the connecting sleeve and the dial pin of the spool are connected into the groove at the upper end of the shaft. When the flat square on the spool is rotated, the powerful sound of the pump of the steering gear can be heard, and the left chamber is turned to the left. Turn right and turn right into the oil. Finally, install the thrust bearing, bonnet, cross-connect block and connect with the steering rod, then connect the copper tube of the steering pressure gauge and open the hydraulic tank switch. The above method is used to judge whether the spring piece is broken and the spring piece is replaced, the number of disassembled parts is small, the loss of hydraulic oil is small, and other failures of the steering gear are not caused after the repair. Hydraulic press four column hydraulic press machine Features Hydraulic Press,Hydraulic Oil Press,Hydraulic Press Machine,Processing Hydraulic Press Rugao Yaou Import & Export Trade Co., Ltd , https://www.ntyaou.com
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