Equipment for Engineering Education

Instruction ManualHM150 Hydraulics Bench

G.U.N.T. Gerätebau GmbHP.O. Box 1125

D-22881 Barsbüttel • GermanyPhone (040) 670854-0Fax (040) 670854-42

Instruction Manual

Publication No. 917.00000A15012 06/04

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Table of Contents

1 Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Notes on handling and safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Determine volumetric flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5 List of experiments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7 Contents of Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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1 Technical Description

The basic Hydraulics Bench and the various ancil-lary modules available form a comprehensive la-boratory facility which enables a detailedMechanics of Fluids Laboratory. The hydraulics bench unit provides the basic ser-vices for the pumping and volumetric measure-ment of the water supply with which all theadditonal accessories and experiments are used.The working surface of the unit is in fibreglass,moulded to provide a recessed area on which tomount experiments. An integral weir tank is provi-ded along with a volumetric measuring tank. Themeasuring tank is stepped to enable for accuratemeasuring of both high and low flow rates. A levelindicator allows convenient read out of the flow.The measuring tank discharges into a fibreglasssump tank via a valve. Overflow pipe is provided.An electric motor drives a submersible motor dri-ven pump which delivers water to the outlet at theworking surface for connection to the individualexperiments. Materials used in the bench construction and itsmodules have been carefully selected in order tominimise corrosion problems. The entire unit isself-contained and mobile. For low volumetricmeasurment use the 2ltr. measuring cup.

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1 Technical Description 3

Details

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1 Volumetric measuring tank with channel

2 Remote sight gauge

3 Sliding valve

4 Sump tank

5 Drain cock

6 Submersible motor driven pump

7 Water supply for accessories with pump

8 Flow control valve

9 Overflow pipe

10 Switch box

11 Discharge cap

12 Water supply connection for accessories without pump

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1 Technical Description 4

2 Notes on handling and safety

The unit leaves the factory in perfect condition froma safety point of view. To maintain this state andensure safe operation, the following points shouldbe observed:

- DANGER: Electric shockPull the power cord before working on theelectric circuits.

- Any modifications and repairs to the electricalequipment must only be carried out by qualifiedstaff.

- In the event of obvious defects (e.g. split insu-lation on the electric wires), operation of thesystem is potentially fatal. In such cases, shutdown the system immediately.

- Never allow the electrical components to comeinto contact with water.

- CAUTION:

- Only operate the system in dry, sealed roomscontaining no combustible or caustic gases,vapours or dusts.

- When filled with water, lines and tanks shouldbe protected against frost.

- Never operate the submergible pump with thetank empty.

- Drain water of sump tank during downtime.

Before commissioning the system, the participantsin the experiment should be instructed in correcthandling of the equipment.

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2 Notes on handling and safety 5

3 Commissioning

Set up training stand on a even surface.

- Fill sump tank with tap water until the waterlevel is 10 cm below edge of sump tank.

- Connect electric power supply

- Screw the discharge cap or a hose at the endof the discharge pipe

- Switch on main power switch

- Switch on pump

- Open flow adjustment valve careful

4 Determine volumetric flow rate

To do so, use stopwatch to establish time t required for raising the level in the volumetric tankof the HM150 from 20 to 30 litres.

- Close the outlet valve

- Read the actual volume at the remote sight gauge

The volume flow-rate is calculated as

V .

= ∆V∆t

The density of water is considerd as ρ = 998 kg

m3

The gravity acceleration g = 9.81ms2

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3 Commissioning 6

5 List of experiments

The experimental topics covered include, togetherwith the individual experimental set-ups.

- HM150.01 Investigation of pipe friction, withlaminar and turbulent flow

- HM150.03 Flow over a notch, Accessories

- HM150.04 Centrifugal Pump Charactericstics

- HM150.05 Hydrostatic Pressure Apparatus

- HM150.06 Metacentric Height Apparatus

- HM150.07 Bernoulli’s Theorem DemonstrationApparatus

- HM150.08 Impact of Jet Apparatus

- HM150.09 Orifice and Jet Apparatus

- HM150.10 Flow visualization Apparatus

- HM150.11 Fluid friction Apparatus

- HM150.12 Orifice Discharge Apparatus

- HM150.13 Flow Meter Demonstration Apparatus

- HM150.14 Free and Forced Vortex Apparatus

- HM150.15 Hydraulic Ram

- HM150.16 Series/Parallel Pump Test

- HM150.18 Osborne Reynolds DemonstrationApparartus

- HM150.19 Demonstration Pelton Turbine

- HM150.20 Demonstration Francis Turbine

These equipment are optionally available.

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5 List of experiments 7

6 Technical Data

Overall dimension(L x W x H) 1220 x760x1200 mmWeight: 125 kg

PumpHead: H = 11 m Flow: Q = 230 ltr/min

Electrical supply 230V / 50Hz ; 0,55 kWAlternatives optional, see type plate

Sump tank 170 ltr

Volumetric tanksHigh flow: 40 ltrLow flow: 10 ltr

Beaker: 2 ltr

Stop watch: 1/100 s

7 Contents of Supply

Basic unit hydraulics bench with the

following components:

1 integral fibreglass surface with volumetric tank1 sump tank1 pipe system with valves, PVC1 level gauge1 submersible motor driven pump1 electrical control unit1 beaker1 stop watch1 Instruction manual

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6 Technical Data List of experiments 8