Roller hydraulic steering gear combination valve structure improvement

Roller hydraulic steering gear combination valve 2020 - structure improvement 07 - 03 chang-you liu (liu Anhui technical college of traffic civil department) 1 improve the reason of roller on the old hydraulic steering gear combination valve on the overflow valve and two-way cushion valve in use process, if the valve core and valve sleeve, steel ball and seat rust, or by foreign body card, in the hydraulic oil or its aging sealing ring and spring failure, sealing surface wear, all can cause abnormal full hydraulic steering gear work. After the above problems, both need to overhaul and repair. Because the old overflow valve and two-way cushion valve valve core mounting holes are not hole, causing the valve core, valve cover, valve seat is difficult to remove and the resulting combination valve is unable to repair and scrap. This not only increases the maintenance costs, but also affect the normal use of the machinery, so we decided to improve the overflow valve and two-way cushion valve structure. Improve the overflow valve and before the two-way cushion valve as shown in figure 1 and figure 2 a shows a. Two improved methods will no two-way buffer overflow valve and valve body hole at one end to the thread hole, add hexagonal screw plug and composite gasket. After setting hole and hexagonal screw plug, disassembling body parts is very convenient. Set combination gasket sealing hole end face. Specific improvement method is as follows: first of all, will overflow valve and disintegration of two-way cushion valve respectively, take out inside its body parts. Second, no hole in the overflow valve and double buffering valve body side marking, drilling hole, tapping M12 & times; 1. 5 internal thread. Again, using the lathe will be two M14 & times; 1. Five hexagonal head bolt instead of 2 M12 & times; 1. 5, thread length is 12 mm hexangular screw plug, each only hexagonal screw plug configuration 1 only the combination of the inner diameter of 12 mm gasket. In the end, will improve after the overflow valve and two-way cushion valve refitted. The improved relief valve and two-way cushion valve as shown in figure 1 and figure 2 b b. 3 improvement effect after the improvement, the maintenance and repair combination valve on the overflow valve and two-way cushion valve, just put the elastic ring and hexagonal screw wall to be removed, with 1 diameter 10 mm soft iron bar from the screw plug end push gently, can overflow valve, bidirectional cushion valve parts will be removed, and will not damage parts. The improved simple and low cost. Source: engineering machinery and maintenance phase 2 in 2016