How to reduce the working pressure of hydraulic pump in digging machine

First: Improve the design of hydraulic systems. After many arguments, advanced priority valve and load sensing full hydraulic steering gear form are used. The new system can prioritize the distribution of traffic according to the steering requirements, and ensure that the fuel supply is adequate regardless of the size of the load and the speed of the steering wheel. The rest of the system can be supplied to the work unit circuit, eliminating the need for excessive oil supply to the steering circuit. Power loss increases system efficiency, which reduces the hydraulic pressure of excavator work.
Second: Optimizing the design of the digging machine and the shape of the boom cylinder and the hydraulic pump can also reduce the working pressure of the hydraulic system of the digger. With optimized calculations, the boom cylinder uses the standard series 80/4. The displacement of the hydraulic pump was increased from 10ml/r to 14ml/r, and the system set pressure was 14mpa, which satisfied the lift force and speed requirements of the boom cylinder.
Third: In the process of using, attention should also be paid to the correct use and maintenance of the digging machine, adding or replacing hydraulic oil on a regular basis, maintaining the cleanliness of the hydraulic oil, and strengthening daily inspection and maintenance.

 connecting sleeve seamless steel tube

name high quality hot rolled cold drawn steel square bar 
material grade q235,20cr,40cr
sizes range 8mm-80mm
tolerance 1-2% tolerance
length 3m,5.8m or 6m
surface black,bright
test squash test, extended test, water pressure test, crystal rot test, 
heat treatment, ndt
chemical composition

chemical composition q235 20# 45#
c 0.14~0.20% 0.17~0.23 0.37~0.45
mn 0.30~0.65 0.35~0.65 0.50~0.80
s ≤0.050 ≤0.035 ≤0.035
p ≤0.045 ≤0.035 ≤0.035
si ≤0.30 0.17~0.37 0.17~0.37
mechanical properties

tensile strength 380~400 ≥410 ≥580
yield strength 235 ≥245 ≥335
extension 26% ≥25 ≥19

name: cold rolled hexagonal steel 
cold rolled hexagonal steel packing:packing for export standard,plastic film and wooden case packing,etc
cold rolled hexagonal steel payment:l/c at sight or 40% advanced payment
cold rolled hexagonal steel delivery time:25-40 days
cold rolled hexagonal steel inspection:can do sgs inspection or other pre-shipment inspection
1) stainless steel fasteners, chains, kitchen and sanitary wares
2) electronic products parts, medical appliances, springs
3) decoration materials and outdoor publictiy billboard, electron products
4) tablewares, bolts, nuts, screen meshs, cumbustors etc

Seamless Steel Pipe For Steel Bar Connecting Sleeve

connecting sleeve seamless steel tube

Liaocheng Xinglong Seamless Tube Manufacturing Co., Ltd. ,