hydraulic cylinder test bench
hydraulic cylinder type test bench and hydraulic cylinder factory test bench are developed according to gb/t 15622—1995 《test method for hydraulic cylinders》.

the hydraulic cylinder type test bench adopts dual oil tanks, power recuperation, counteracting test mode. it will perform the following test items: ① trail run，② internal leakage test，③ loading efficiency，④ pressure withstanding test，⑤ travel check，⑥ external leakage test，⑦ durability test，⑧ starting pressure test。

the hydraulic cylinder factory test bench consists of hydraulic test system, electric control system, test bench and computerized testing system. it can perform the following test items: ① trail run，② internal leakage test，③ starting pressure characteristics, ④ pressure withstanding test，⑤ travel check，⑥ external leakage test，⑦ reciprocal loading test.

the data acquisition system adopts cat system consisting of digital displayed instruments, industrial computer, computer interface box, data collection card and printer to perform data acquisition, display and processing and create test report and printed output promptly .

hydraulic valve test bench

the hydraulic valve type test bench and hydraulic valve factory test bench for valves (multi-way directional valve, flow amplifying valve, speed regulating valve and etc.) on construction machinery are developed according to national standards.

hydraulic valve test bench consists typically of pump station, hydraulic test system, loading bench, leaked oil recuperation system, electric control system and computerized data acquisition system. frame type structure is normally adopted for hydraulic valve test bench. hydraulic test system, hydraulic test sensors and leaked oil recuperation system are installed in a cabinet, with pressure gauge, pressure gauge cock mounted on the panel, primary measuring instrument. primary test instruments, specimen connecting ports can easily be connected to components tested to obtain parameters measured and site observation of test process and parameter variation are facilitated.

test parameters are collected via instrumentation (digital pressure gauge, digital flow meter, digital temperature meter and etc.), data interface box, data collection card and industrial computer to implement computerized static and dynamic data acquisition, processing, graphic analysis (pressure loss curves, internal leakage curves, safety valve iso-pressure characteristics curves, directional valve inching characteristics curves and safety valve transient response characteristics curves), test report output and data management
.

main parameters of the test bench
⒈maximum installed power: 315kw
⒉maximum pressure of main test system: 31,5 mpa
⒊ flow rate of main hydraulic test system: 0—400 l/min
⒋class of cleanliness（iso4406）:19/16
⒌accuracy of measurement and control:class b or c

hydraulic component service and inspection test bench

the hydraulic component service and inspection test bench consists mainly of hydraulic pump station, hydraulic valve test bench, pump and motor test bench, computerized test data acquisition system and electric control system. it can perform rapidly and reliably the inspection of hydraulic pump, hydraulic motor, hydraulic valve and hydraulic cylinder. computerized analysis and processing are adopted for test data and test reports are automatically generated.
  

combined hydraulic component test bench for construction machinery

the combined hydraulic component test bench for construction machinery is composed of pump station, hydraulic pump-valve test bench, hydraulic cylinder-steering component test bench, leaked oil recuperation pump station, electric control system and data acquisition system.
the combined hydraulic component test bench for construction machinery is developed according to requirements of jb/t7042─1993《test method for hydraulic gear pump》、jb/t9714-1999《test method for construction machinery variable speed pump》、jb/t8729.2-1998《test method for hydraulic multi-way valve》、gb/t15622-95《test method for hydraulic cylinder》、q/lhy010-1997《test method for flow amplifying valve》and jb/t5120-2000《cycloidal full hydraulic steering gear》. it can perform reception inspection before installation and troubleshooting of two kinds of construction machinery hydraulic components at the same time. it can also perform test of system composed of selector valve, pilot valve, safety valve and hydraulic multi-way valve, and system composed of steering gear, limit valve, safety valve and flow amplifying valve. computer is used for data acquisition, processing and analyzing during test process to accomplish easily, rapidly and accurately the requirements of various test items.

main technical specifications of the test bench:
（1）total installation power:457kw
（2）maximum pressure of main teat system:31.5mpa
（3）flow rate of hydraulic pump-valve test bench:0 - 390 l/min
（4）flow rate of hydraulic cylinder-steering component test bench:0 – 190 l/min
（5）test speed of hydraulic pump tested:600——2200 r/min
（6）maximum pressure of control system:31.5 mpa
（7）flow rate of control system:2′23 l/min
（8）maximum pressure of auxiliary system:31.5 mpa
（9）flow rate of auxiliary system:14 l/min