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China’s leading HLA4FO500 high-flow, high-pressure axial piston pump

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High-performance, high-reliability hydraulic piston pumps are core components in the hydraulic systems of construction machinery, yet they also represent a weak link in China’s construction machinery industry. Compared to other hydraulic components, piston pumps have even higher reliability requirements and pose greater challenges in research and development. Upholding its positioning as “China’s leader in hydraulics,” the Hengli Hydraulics R&D team remains committed to independent innovation and consistently focuses on the R&D and production of piston pumps and motors, continuously achieving breakthroughs in the field of hydraulic piston pumps. The HLA4FO500 series of high-end hydraulic pumps is a flagship product of Hengli Hydraulics and has received widespread acclaim in the market. HLA4FO500 series
　　High-performance, highly reliable hydraulic piston pumps are core components in the hydraulic systems of construction machinery, yet they also represent a weak link in China’s construction machinery industry. Compared to other hydraulic components, piston pumps have even higher reliability requirements and pose greater R&D challenges. Upholding its positioning as “China’s leader in hydraulics,” the Hengli Hydraulics R&D team remains committed to independent research and development and innovation, consistently focusing on the R&D and production of piston pumps and motors, and continuously achieving breakthroughs in the field of hydraulic piston pumps.
 
　　The HLA4FO500 series high-end hydraulic pumps are a flagship product of Hengli Hydraulics and have received rave reviews in the market.
 
　　The cylinder block of the HLA4FO500 series high-end hydraulic pump is manufactured using a state-of-the-art bimetallic sintering process, achieving a perfect combination of high structural strength and excellent wear resistance in the cylinder block matrix. The key porting friction pair features a spherical porting design, enhancing the cylinder block’s self-aligning capability and ensuring high volumetric efficiency. A nine-slit inclined-cylinder-port design is employed to provide self-priming performance and reduce flow pulsation. The main structure adopts a through-shaft support with a well-balanced dynamic configuration, enabling a high rated rotational speed.
 
　　Currently, the HLA4FO500 series hydraulic pumps have been successfully applied to China’s largest 19,500-ton forging press manufactured by Jiangsu Guoguang, continuously driving the development of China’s heavy industry. As the only domestic manufacturer currently capable of producing the HLA4VSO500 piston pump with consistent high performance, Hengli Hydraulics has, based on the HLA4FO500 fixed-displacement piston pump, successively developed variable-displacement piston pumps such as the HLA4VSO500DR, HLA4VSG500HD1, and HLA4VSO500DFE1, as well as the HLA4SM500DZ variable displacement motor. These products fully meet customer requirements for equipment selection and replacement of imported units.
 
　　The performance parameters of the HLA4FO500 series high-end hydraulic pump are as follows:
 
　　1. Rated displacement: 500 mL/r;
 
　　2. Rated working pressure: 35 MPa;
 
　　3. Rated operating speed: 1500 rpm
 
　　4. Maximum working pressure: 40 MPa
 
　　5. Maximum operating speed: 2000 rpm
 
　　6. Volumetric efficiency: >95%
 
　　7. Overall efficiency: >90%
 
　　[Supplementary Information: Since the rapid forging process has been widely adopted in industrial manufacturing, the demand for fast, efficient, and precise forging has posed significant challenges to the performance of conventional hydraulic presses. R&D engineers are urgently in need of a high-displacement axial piston pump that features high working pressure, low noise, high reliability, a superior power-to-weight ratio, and high overall efficiency—qualities essential for meeting the hydraulic power source requirements of hydraulic presses.]

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Latest updates

2019-12-05

The company has been awarded the “AAA”-level harmonious labor relations enterprise designation by Chongqing Municipality.

Recently, Chongqing Hydraulic Mechanical-Electronical was jointly recognized by the Chongqing Municipal Bureau of Human Resources and Social Security, the Chongqing General Trade Union, the Chongqing Enterprise Confederation, and the Chongqing Federation of Industry and Commerce as a “AAA”-level (the highest level) enterprise with harmonious labor relations. Over the past year, the Party and administration of Chongqing Hydraulic Mechanical-Electronical have continuously strengthened human resource management, guided by the "Guiding Opinions on Intensifying Talent Recruitment and Development to Promote Enterprise Growth," and have steadily carried out efforts to "recruit, employ, and retain talent." By establishing proactive compensation policies, the company has attracted and recruited talented individuals...

2019-12-04

Prevent problems before they become serious—Chairman Li Jie leads a team to carry out safety inspections.

On November 29, Li Jie, Party Secretary and Chairman of the company, personally led a team—including responsible persons from the Safety Technology Department, the Production Support Department, the Security Office, and heads of various specialized groups under the Safety Certification—on comprehensive inspections of the safety production conditions at each unit and at Rui'ou Company.

2019-12-04

The special inspection and rectification team for confidentiality from the Chongqing company visited the company to provide guidance and inspection.

On December 2, a four-member inspection and supervision team from the Chongqing company’s special rectification effort for confidentiality conducted a targeted inspection of the company’s confidentiality work. Members of the Confidentiality Committee—including company leaders Li Jie, Liu Bing, Lu Bin, and Ran Yimin—as well as personnel from the Confidentiality Office and relevant departments, attended the briefing session on the special inspection of confidentiality work.

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