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HYDRAULIC GATE OPENER EX700

This is a commonly used gate opener, adapted to investigate studies in mechanical and energetic engineering. The system permits different but complementary studies: experimentation, modelling and computer aided design with special CAD software in 2D (AUTOCAD®) and 3D (SolidWorks®).

PRINCIPAL TEACHING OBJECTIVES

The equipment covers the following areas of study :

• Energetic

• Fluid mechanics

• Functional analysis of an industrial product

• Technical communication tools

• Relationship between product - manufacturing process - material

• Measurement of physical values and calculation of performance

These calculations are entered into a spreadsheet file (model supplied) to allow interpretation of the test data and results.

Using the measurements and experimental data, calculations will among other give :

• The theoretical capacity of the pump (using CAD software)

• The determination of the following parameters, based on the measurements obtained with the equipment:
- Translation speed of jack rod (time, distance)
- Theoretical flow rate of the pump (capacity, rotation speed)
- Oil flow rate (piston diameter, rod diameter, rod speed)
- Released mechanical power (mass lifted, rod speed)
- Resultant pressure forces on the piston (piston diameter, rod diameter, pressure)
- Jack efficiency and global efficiency ( if functioning in load)
- Flow measurement comparison: pump - jack and jack - pump.

• Analysis of the functions provided by the different valves and safety pressure valve used in the hydraulic circuit

• Highlighting of the change in efficiency and friction as a function of the applied load and temperature increase

• Analysis of the design methods associated to prevent leaks and to facilitate assembly…

TECHNICAL SPECIFICATIONS

The electro-hydraulic gate opener is mounted on a plastic PVC base together with the related instrumentation.

It includes :

- An electrical motor

- An oil gear pump

- A lift device for the mass ( the masses can be hanged in a driven position or a braking position)

- A complete instrumentation allowing the measurement of:

• Motor speed using an induction sensor and signal conditioner / indicator display

• Power consumed using an optional Clamp-type ammeter

• Oil pressure in the two supply circuits of the cylinder using 2 pressure gauges

• Time taken for the shaft to reach a predetermined position using an optional stopwatch

Certain essential specifications for the equipment are provided, including :

• Pump dimensions, measured on a tri-axis measurement machine and profile projector, supplied on CAD files

• Performance specifications of the hydraulic jack

• Intensity of the lifted mass (system can also be used empty)

EQUIPMENT PACKAGE

Standard equipment EX700:

Table top test bench (the table is not supplied)

The masses are not included as standard

Essential requirements :

• Voltage : 220V, 50 Hz, other voltages available on demand

• Clamp-type ammeter,

• Stopwatch,

• Set of masses : 4 x 1 5 kg

• 100 MHz PC with Windows*, Excel*, AutoCAD** and SolidWorks***

* Windows, Excel are a registered trademark of Microsoft.

** AutoCAD is a registered trademark of Autodesk Inc.

*** SolidWorks is a registered trademark of SolidWorks Corporation.

Dimensions and weight

- 1200 x 300 x 200 mm

- Weight : 20 kg