I. Introduction computer-controlled electro-hydraulic servo system,
the coordination of multi-point loading test system for the right
anchor, metal products, metal mini-components, transport,
construction materials, components, concrete products components,
building a small model, piers damping rubber pad , beams etc.: single-point static compression test; single point of
dynamic compression test; single point of low-frequency fatigue
test; single point of low-cycle fatigue test cycle; simply
supported beam three-point bending static and dynamic tests;
combination of static and dynamic three-point bending beam test;
multi-point coordination load test; structural mechanics test; public vehicles
toss test. Others who need more coordination of controlled trials, testing
process can be prepared according to user requirements.
Second, the system usually consists of the following sub-systems
constitute the composition: oil source, bearing frame, servo
actuators, hydraulic control systems, PCI-based software
measurement sensors and control system and electrical control
systems.
1. Oil sources commonly used multiplexing relatively independent
design. Each load point corresponds to a separate actuator, equipped with a
separate motor pump group, making the loading points, there is no
hydraulic pressure between the basic level of mutual interference. In order to maintain the long-term continuous working conditions
ideal oil temperature, fuel tank with large capacity design, while
setting a suitable cooling device (as far as possible use of
air-cooled approach to facilitate the installation and
maintenance). Fuel tank is sealed, and choose a larger oil filter when there are
reservations about the redundancy, makes the oil-source system
maintenance workload has become very small, usually less than 3
years operating conditions do not need to replace the oil filter
and add hydraulic oil.
2. Carrying framework as more than 30 years old tester factory
(Zhejiang Jing-Yuan Machinery Equipment Co., Ltd.), we have
experienced team of engineers and sheet metal from the casting to
the complete machining capabilities, from design to manufacturing,
inspection and all at the ISO9000 system of terms, we may need to design and produce
according to the user a variety of specifications bearing
frameworks and anti-power wall.
3. Servo actuators actuators are designed mainly based on overall
system performance requirements to determine the actuator gap,
friction, leakage, and many other parameters. On this basis, the basic structure of the implementing agencies and
identify a comprehensive adjustment of the various parameters to
optimize the design to obtain the required optimal resonant
frequency of the system and hydraulic natural frequency. This will send the body resonance coupling with the hydraulic
system caused by the small damping of low-frequency integrated
resonant state, and work to improve the stability of the system
frequency response. Dynamic seal used in all imports, to ensure a low friction, no
leakage, no crawling, non-astringent stagnation, high-response,
long life, satisfying the servo actuator static accuracy, dynamic
quality requirements; piston rod machining are Ultra-finishing, the process is very elegant. Hard chrome plating on the piston rod through the grinding and
polishing layer, its roughness is less than Ra0.2, rod surface of
the mirror, which is to ensure that an important condition for the
piston rod does not leak; displacement sensor built-in, sensing
core sports free from external interference, to overcome the effects of
rotation, reducing the failure rate.
4. Hydraulic control system, a key component in the system uses
electro-hydraulic servo valve MOOG United States the world's
leading brands of products, with high precision, sensitivity is
good, blind spots small, fast response, stable performance and
reliable characteristics of the low-frequency static test and
dynamic test equipment hydraulic control in the preferred brand. MOOG valve on the oil cleanliness for demanding characteristics of
the installed capacity of debugging before the arrangement has a
dedicated hydraulic system cleaning technology to effectively solve
this problem has not occurred due to the use of plug valve failure. The hydraulic system components are used in other well-known for
establishing a new product.
5. PCI-based sensors and measurement and control system software,
hardware and software of |
