ZMH2107 Double Sides Proportional Hydraulic Trainer Didactic Equipment
The hydraulic system works by changing the pressure and increasing the force. A complete hydraulic system consists of five parts, namely, power component, executive component, control component, auxiliary component (accessories) and hydraulic oil. Hydraulic system can be divided into two categories: hydraulic transmission system and hydraulic control system. Hydraulic transmission system to transfer power and motion as the main function. The hydraulic control system should make the output of the hydraulic system meet specific performance requirements (especially dynamic performance) [1]. Generally speaking, the hydraulic system mainly refers to the hydraulic transmission system.

Part of the
Hydraulic system of scraper
Hydraulic system of scraper
A complete hydraulic system consists of five parts, namely, power component, executive component, control component, auxiliary component (accessories) and hydraulic oil.
Power element
The action of the power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. The structure of hydraulic pump generally has gear pump, vane pump, plunger pump and screw pump.
actuators
The actuator (such as a hydraulic cylinder and a hydraulic motor) is used to convert the pressure energy of the liquid into mechanical energy, driving the load to reciprocate or rotate in a straight line.
Control element
Control elements (i.e., various hydraulic valves) control and regulate the pressure, flow and direction of the liquid in a hydraulic system. According to different control functions, hydraulic valves can be divided into pressure control valves, flow control valves and direction control valves. Pressure control valve includes overflow valve (safety valve), pressure reducing valve, sequence valve, pressure relay, etc. The flow control valve includes the throttle valve, the adjustment valve, the shunt collector valve and so on. Direction control valve includes one-way valve, liquid control one-way valve, shuttle valve, reversing valve, etc. According to different control modes, hydraulic valves can be divided into switch type control valves, fixed value control valves and proportional control valves.
Auxiliary components
Auxiliary components include oil tank, oil filter, cooler, heater, energy storage, tubing and pipe joint, seal ring, quick change joint, high-pressure ball valve, rubber tube assembly, pressure gauge joint, pressure gauge, oil level gauge, oil temperature gauge, etc.
The hydraulic oil
Hydraulic oil is the working medium of energy transfer in hydraulic system, there are several kinds of mineral oil, emulsifying liquid and forming hydraulic oil.
I.Introduction
I‘s suitable for schools, engineer training centers, factory training department etc.
Through this trainer, students can master hydraulic components structure, hydraulic circuit control theory, hydraulic circuit design, and hand on ability for hydraulic trainer.
This trainer is flexible and students can design their own hydraulic circuit.
II. Technical parameter
(1) DC power: input AC 220V,50Hz Output: DC 24V/3A
(2)Wheel: 4, 2 lockable with brake, 2 not lockable
(3) Hydraulic station:
nominal volume: 35L
rated output hydraulic pressure is 16MPa,
pump type: gear pump
(4) Slot space:25mm
(5) Panel material: aluminum
(6) Workbench type: single side two work station for 2 students
(7) Hydraulic station with hydraulic oil
(8) Whole equipment dimension:1400mm(L)×840mm(W)×1620mm(H)
(9)Aluminum panel dimension: 1200(L)×750(W)
(10)Cabinet: 1
III. Experiment that can be finished
1. Direction control circuit
(1)Hand operated direction valve direction change circuit
(2)Solenoid directional valve direction change valve
2. Pressure control circuit
(1)Single grade pressure adjust circuit
(2)Secondary pressure adjust
(3)Single grade pressure decrease circuit
(4)Secondary reduce pressure circuit
(5)Use “M” direction change valve lief circuit
( 6)Use selector valve lief circuit
(7)Use overflow valve lief circuit
(8)pilot operated check valve protect voltage
3. Speed adjust circuit
(1)Oil inlet throttling governing
(2)Back oil circuit throttling governing
(3)By pass circuit throttling governing
(4)Speed adjust valve speed synchronizing circuit
(5)Speed adjust valve parallel circuit
(6)Speed adjust series circuit
5. Use sequence valve sequent circuit
6. Use stroke switch control sequent circuit
7. Use pressure relay control sequent circuit
8. Use pilot operated check valve single direction lock close circuit
9. Use pilot operated check valve two directional close circuit
10. Use “O” type directional change valve close circuit
11. Relay control hydraulic basic circuit
12. Hydraulic component capacity measure experiment