Equipment for Engineering Education
Instruction Manual
HM150 Hydraulics Bench
G.U.N.T. Gerätebau GmbH
P.O. Box 1125
D-22881 Barsbüttel
• Germany
Phone (040) 670854-0
Fax (040) 670854-42
Instruction Manual
Publication No. 917.00000A15012 06/04
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l
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
HM150
Hydraulics Bench
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l 21 Technical Description
The basic Hydraulics Bench and the various ancil-lary modules available form a comprehensive la-boratory facility which enables a detailed Mechanics 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 the additonal accessories and experiments are used. The working surface of the unit is in fibreglass, moulded to provide a recessed area on which to mount experiments. An integral weir tank is provi-ded along with a volumetric measuring tank. The measuring tank is stepped to enable for accurate measuring of both high and low flow rates. A level indicator allows convenient read out of the flow. The measuring tank discharges into a fibreglass sump 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 the working surface for connection to the individual experiments.
Materials used in the bench construction and its modules have been carefully selected in order to minimise corrosion problems. The entire unit is self-contained and mobile. For low volumetric measurment use the 2ltr. measuring cup.
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l 1 Technical Description 3
Details 12 11 10 9 8 7 6 5 1 2 3 4
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
HM150
Hydraulics Bench
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l 1 Technical Description 42 Notes on handling and safety
The unit leaves the factory in perfect condition from a safety point of view. To maintain this state and ensure safe operation, the following points should be observed:
- DANGER: Electric shock
Pull the power cord before working on the electric circuits.
- Any modifications and repairs to the electrical equipment must only be carried out by qualified staff.
- In the event of obvious defects (e.g. split insu-lation on the electric wires), operation of the system is potentially fatal. In such cases, shut down the system immediately.
- Never allow the electrical components to come into contact with water.
- CAUTION:
- Only operate the system in dry, sealed rooms containing no combustible or caustic gases, vapours or dusts.
- When filled with water, lines and tanks should be protected against frost.
- Never operate the submergible pump with the tank empty.
- Drain water of sump tank during downtime.
Before commissioning the system, the participants in the experiment should be instructed in correct handling of the equipment.
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l
3 Commissioning
Set up training stand on a even surface.
- Fill sump tank with tap water until the water level is 10 cm below edge of sump tank. - Connect electric power supply
- Screw the discharge cap or a hose at the end of 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 tank of 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 = 998kg m3 The gravity acceleration g = 9.81m
s2
HM150
Hydraulics Bench
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l 3 Commissioning 65 List of experiments
The experimental topics covered include, together with the individual experimental set-ups.
- HM150.01 Investigation of pipe friction, with laminar 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 Demonstration
Apparatus
- 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 Demonstration Apparartus
- HM150.19 Demonstration Pelton Turbine - HM150.20 Demonstration Francis Turbine
These equipment are optionally available.
All ri g h ts r e s e rv e d G .U .N .T. G e rä te b a u G m b H , Ba rs b ü tt e l 5 List of experiments 7
6 Technical Data Overall dimension (L x W x H) 1220 x760x1200 mm Weight: 125 kg Pump Head: H = 11 m Flow: Q = 230 ltr/min Electrical supply 230V / 50Hz ; 0,55 kW Alternatives optional, see type plate
Sump tank 170 ltr Volumetric tanks High flow: 40 ltr Low 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 tank 1 sump tank
1 pipe system with valves, PVC 1 level gauge
1 submersible motor driven pump 1 electrical control unit
1 beaker 1 stop watch 1 Instruction manual
