China Guangdong Haozheng Hydraulic Equipment Co., Ltd. Company cases

Nanyang hanye special steel co., LTD. (China) - manufacturer of special steels

Context of the project The main hydraulic and high pressure stations in the foundry use rexroth a10vs0140 constant high pressure axial piston pumps. During production rexroth a10vso140 often produces abnormal noise, works unstable, slowly, and the turning of the executive element of the cylinder cold bed occurs slowly. When the load increases, it is difficult to raise the pressure in the system, which causes a number of problems and failures, seriously affecting the production process and the quality of procurements. The main reason The maximum peak pressure of the rexroth a10vso140 pump is 35 mpa and the nominal pressure is 28 mpa, which is less than the maximum pressure required for the operating components (37.72 mpa). This means that the pump works long term at maximum pressure, which significantly reduces the life. Decision of the board Upgrade and replacement with hzpv180 pump from haozheng, maximum pressure 42 mpa, working pressure 35 mpa, meets the requirements of the system. Comparing the size drawings shows that the changes are small and do not affect the space for installation and maintenance.

Xinjiang bayi iron & steel co., LTD. (China) - iron & steel industry

Context of the project The steel plant initially used a plunger pump of type cy. During the daily operation of hydraulic equipment, frequent loading and unloading is required, the working pressure constantly fluctuates between 19 mpa and 21 mpa. As a result, the entire hydraulic system is subjected to hydraulic shock, the high-pressure plunger pump, valves and other hydraulic components are frequently damaged, pipelines are frequently blown up and leaking, frequent failures occur and production costs increase. Decision of the board Replacement of high pressure plunger pump with hzpvh98 with constant variable pressure control to ensure system pressure stability and hydraulic shock removal. Processing of the safety unit, simplification of the pressure management structure and procedures. Optimization of electric control program, simplification of electric control, prevention of failures caused by electric reasons. Adjusting the pressure relay control program, ensuring stable operation of the hydraulic foundry system and protection functions.