At present, the equipment has been installed in place and will be debugged at a later date.

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The company's leading products are DSS (dynamic-static-state) series of microcomputer-controlled electro-hydraulic servo static and fatigue test system. This series of products is based on the company's independent research and development of dynamic servo controller and measurement and control software as the core, the use of unitization, standardization, modularization of the design means, and different test machine host, hydraulic station and test accessories with the composition of different functions of the various types of fatigue test system, mainly used for materials, axle parts and components, as well as other assemblies of the loading, bending or torsion fatigue mechanical testing, including full digital multi-channel Coordinated loading test system, axle fatigue test system, torsion fatigue test system and so on.

These test systems can be widely used in many research fields such as aviation, aerospace, railway, vehicles, ships, automobiles, building structures, etc. for testing and evaluating the performance, quality and life of products. The product technology has reached the international advanced and domestic leading level, and has been recognized by many large and famous domestic production enterprises.

The entire test system is based on a horizontally mounted base plate with T-slots on the foundation, and each hydraulic actuator unit is designed as an independent module, using an independently removable portal frame and specialized fixtures. The portal frame is moved into position when required and bolted to the steel floor, while the hydraulic actuator cylinders are mounted on the upper beam of the portal frame or in a dedicated position.

The use of parallel sets of high pressure, high flow, high power oil pump motor unit, with the relevant oil storage, cooling, safety, filtration, electronic control unit, combined into an independent hydraulic pumping station, as the energy to provide the source of each hydraulic action unit. In order to provide a comfortable test environment and reduce operating noise, the hydraulic pump station is placed in an independent closed environment outside the test room, under the floor in the test room laid back to the type of oil pipeline connected to the hydraulic pump station. A number of connections are provided on the piping in the test chamber, and high pressure hoses can be used to transfer hydraulic fluid to the hydraulic actuator when required.

2, There is no force feedback, completely open-loop control - low control accuracy, can not be uniformly loaded.

3,In the static test, it completely relies on manual control.

4, the piston stroke is very small, completely unable to meet the axle fatigue test when the axle body deformation requirements.

5,Due to the limitations of structure and principle, the maximum loading load is small, especially in the axle strength test, it can not meet the requirements of the test loading load.

This type of testing machine uses a camshaft driven by a motor to drive a piston pump, which pumps hydraulic oil into the actuator cylinder to drive the piston to eject. The advantages are simple structure, low power consumption, loading frequency adjustment can be realized through the motor speed control. Such products belong to our country in the last century, the 1960s and 1970s products, limited to the technical development at that time, its shortcomings are obvious: due to manually adjusting the relief valve by observing the pointer pressure gauge to set the loading load, so it can not be accurately set fatigue loading of the upper and lower limits of the load, there is no force value feedback, completely open-loop control. The oil pump pumps out only a few hundred milliliters of oil each time (which is the most direct reason for the small power consumption of the pulsation fatigue testing machine), the piston stroke is very small, so the pulsation fatigue testing machine is basically used for construction engineering on the geotechnical, concrete, steel and other deformation of the specimen fatigue test is very small.And because the retraction of the pulsation head (unloading) is dependent on the spring tension on the pulsation head to pull back, and can not track the specimen's own rebound, it is very easy to cause the detachment of the actuator head from the surface of the specimen, so as to produce the phenomenon of the actuator head knocking the specimen. In the axle test, the deformation of the axle body is large (generally in the range of 10~15mm), requiring a high degree of loading simulation (otherwise, it will cause non-axle body's own factors generated by the specimen failure, losing the significance of the test). It can be seen that the pulsation fatigue testing machine due to its own operating principle of the limitations, it can be affirmed that this type of testing machine is not suitable for trailer axle performance test. Many domestic and foreign axle manufacturers almost no use of such equipment for axle testing, which also argues from another aspect of the above conclusion.

In the axle test, whether static or dynamic test, are required to have two balanced loading points on the specimen, the left and right loading point of the loading action and loading load must be the same, which is the fatal flaw of the pulsation fatigue testing machine in the axle test. A single pulsation fatigue testing machine does not have two points in the axle test loading capacity, such as to increase a loading point, must be in the oil circuit in parallel with a doer. But so increase the way to do the actuator, it is bound to half reduce the load and load stroke, completely unable to meet the needs of the axle test. Another way is to parallel the two sets of pulsation fatigue testing machine, synchronization, but the cost of doing so is to multiply the investment in equipment, and the synchronization of the two sets of equipment is very poor.Even if the loading action of the two machines can be synchronized, the loaded load will produce a large deviation, resulting in the left and right loading difference of the axle test, artificially causing non-normal failure of the axle specimen and unreliable test data. In the axle stiffness, strength test, two parallel pulsation fatigue testing machine is simply not possible by manual operation to complete the synchronization of loading (pulsation fatigue testing machine in the static test is completed by manual operation of the inlet and outlet valves). Pulsation fatigue testing machine manufacturers of 1000kN pulsation fatigue testing machine is connected in parallel with two 500kN pulsation fatigue testing machine, in the actual application of the fact that almost none of the successful cases that confirms the above inference.

Electro-hydraulic servo fatigue testing machine:

Electro-hydraulic servo system has many advantages, the most prominent of which is the fast response speed, high output power, high control accuracy, and thus has been widely used in the fields of aviation, aerospace, military, metallurgy, transportation, engineering machinery and so on. Electro-hydraulic servo technology is the best technical means to realize dynamic high-cycle fatigue, program-controlled fatigue and low-cycle fatigue, as well as static constant deformation rate, constant load rate, and a variety of analog simulation test system.

Secondly, the transmission system of the test machine, the current market test machine transmission system, some use reducer, some use common belt, the two transmission methods of the primary fault: the former need to add lubricating oil on a regular basis, the latter can not guarantee the synchronization of the transmission. Beijing Zhongsheng Huaye Technology Co., Ltd. of the test machine transmission system using the full arc synchronous belt deceleration, to ensure the synchronization of transmission precision, high transmission accuracy, high efficiency, smooth transmission, low dry sound, no maintenance, long service life.

Next is the force value of the test machine sensors, because the quality of the sensor determines the accuracy of the test machine and force invariance, the current market tensile force with a small force value of the sensor commonly used S-type sensors, sensors inside the ordinary resistance strain gage type. Beijing Zhongsheng Huaye Technology Co., Ltd. imported sensors for the world's most famous sensor manufacturer, the United States Ambrose force sensor, the sensor high precision, good linearity, stable function.

Again is the power source of the test machine (motor) is also called motor, the current market has a test machine using a common three-phase motor or frequency motor, this motor control response is slow, inaccurate positioning, ordinary speed limitations narrow. There is a high speed without a low speed or low speed without a high speed, and speed control is not accurate, Beijing Zhongsheng Huaye Technology Co., Ltd. motor used for the Japanese Panasonic full digital AC servo motor, control method using full digital pulse control, speed limitations, up to 0.001-1000MM / MIN, control positioning accuracy, fast response, 0.01 seconds can be added to the full range of speed control can be guaranteed! The motor can guarantee the full-scale speed control accurately, and long service life, up to several decades, and do not have to maintain.

The last is the test machine measurement and control system (that is, software and hardware), most of the current market tension machine measurement and control system using 8-bit microcontroller control, sampling speed is low, and anti-disturbance ability is poor, and then is the AD converter, if the number of bits of the AD converter that is, the resolution is low, then the measurement will not be accurate. Beijing Zhongsheng Huaye Technology Co., Ltd. measurement and control system using the world's most advanced 32-bit ARM skills developed by the throttle HytestV6.0. This throttle is based on the 32-bit ARM platform, and running the company's development of the operating system, so that the sequence of operation is more stable.Sampling speed up to 200 times per second, coupled with 24-bit high-precision low-dry sound high-speed AD converter, so that the entire measurement and control system is more high-precision, the upper computer software for the Beijing Zhongsheng Huaye Technology Co., Ltd. developed over several years of all-digital three Bi link system software, there are two kinds of control methods a. PID control conditioning method b. mode lake control conditioning method (the first in the industry). So that the entire experimental process can reach a constant force value control control, constant displacement control, constant deformation control, low-frequency commission control, and order arbitrary control.

Two test machines are described below as a reference:

1、Conventional electronic universal material testing machine

This kind of testing machine is the mainstream product of today's universal material testing machine, it uses servo motor as the power source, screw, silk mother as the executive element, to realize the speed control of the moving beam of the testing machine, it is simple to operate, the requirements of the tester are not high, the test stroke can be customized arbitrarily according to the needs of the testing machine, although the control mode is relatively single, only the speed of a kind of control mode, but the control accuracy and control range is very high and wide. Rigel test machine, for example, its speed adjustment range of up to 0.001mm/min ~ 1000mm/min, stepless speed regulation, control accuracy of up to 0.5, small tonnage models are easy to realize.If doing friction coefficient, the full-value load is only 5 N. It has great flexibility in configuration, and can be equipped with different tonnage transducers, fixtures, accessories to realize multi-purpose, complete the functions of pulling, compression, bending, shearing, peeling, tearing, coefficient of friction, torsion and so on. Throughout the plastics mechanical properties of the relevant standards, the test machine control mode requirements are almost all speed control, so whether from the control mode or speed range, test stroke and test machine tonnage, this type of model is the first choice for the mechanical properties of plastics testing.

2、Electro-hydraulic servo universal material testing machine

Whether the fixture is convenient and safe to use.

whether the clamping is reliable, there can be no slipping phenomenon.

during the test, the sample break point is good. The data discreteness is small. (i.e. the specimen is continuously clamped, inside the clamps, parallel segments or outside the standard distance)

There are several types of materials that are special to their own characteristics and applicable environments, and so far, there are not many solutions.

Beijing Zhongsheng Huanye Technology Co., Ltd. mainly produces all kinds of non-standard testing machine, axle axle testing machine. High-end configuration, leading technology, stable quality, customer satisfaction after sale has always been the goal and direction of our company's continuous pursuit.