Engineering Mechanics and machi

Showing 1–12 of 38 results

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  Engineering Mechanics and machi

  Bifilar Trifilar Suspension Apparatus

  The model permits oscillations on pendulums with bifilar or trifilar suspension to be investigated. For this purpose a bar, a cylinder, or a hollow cylinder made of galvanised steel can be hung from a wall mounted carrier plate made of aluminium and placed in oscillation. The bodies used in the experiments have strong steel hooks for attachment to the suspension cords. The length of the cords can be rapidly changed and securely fixed using clamping wheels. The beam can oscillate, by translation, in the plane of suspension like an ideal mathematical pendulum. The cylinder and the circular ring work as rotary pendulums.

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  Engineering Mechanics and machi

  Cam Analysis Apparatus

  The allows the dynamic investigation of cam mechanisms, as used in motors for actuation of the valves. The cam mechanism consists of 4 interchangeable cam plates and 2 different tracers. A mass and a spring are used to simulate the valve. In order to demonstrate the so-called “valve wobble”, the spring rate, mass and speed are adjustable within broad limits. A plotter allows the actual lift curves to be recorded. The open design allows the observation of every detail of the movement process. A stroboscope (not supplied) can be used to provide a particularly impressive view of the movement process and lift. The unit is intended for demonstration purposes in technical education. It is not suitable for use as a test stand for fatigue testing.

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  Engineering Mechanics and machi

  Cam Mechanism

  Cam mechanisms are used in many areas of technology, such as for valve control in combustion engines. The simple experimental set-up permits quick demonstration of the action principle, and can be used to demonstrate the influence of different cam shapes. The cam follower can work either as a roller tappet, cup tappet, or trailing lever. The stroke is measured using a mechanical position measurement gauge. A scaled disk indicates the associated angle of rotation.

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  Engineering Mechanics and machi

  Cutaway Model Adjustable Cone Pulley Drive

  The range consists of a series of different cutaway models of drive system components. All components are industrially relevant and have been prepared such that individual active elements are clearly visible to the user. The mechanical functionality of all components is retained in full. Each of the cutaway models is securely mounted on a base plate to which handles are attached for carrying purposes. All mechanisms are hand-driven.

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  Engineering Mechanics and machi

  Experimental Module Block on Ring Friction

  Using this instructional unit, investigations are performed on wear. The unit is intended for operation with the basic module . A dog coupling transmits the force from the drive unit. For the experiments, pins made of various materials rub against the external surface of a rotating disc under varying lubrication conditions. Initially a point contact is formed, as the wear increases, this changes to a surface contact. The friction wheel is made of hardened stainless steel, the surface is ground. There is a container for lubricant underneath the friction wheel. The pins are loaded using a lever with weights. The friction forces are measured with the aid of a full bridge strain gauge on the lever joint.

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  Engineering Mechanics and machi

  Experimental Set Deflection Of Trusses

  This experimental set enables, in conjunction with the universal test frame , the elastic deformation of different plane trusses to be experimentally investigated. During these experiments, Castigliano’s theory is demonstrated and applied. The truss members are made of PVC. The different lengths of the members enable numerous truss variants to be assembled and save time-consuming adjustment. The members are quickly and securely attached to the joint disc using special snap action joints. A spindle drive with a ring dynamometer is used to load the truss. The two bearings with joint discs and the loading device are equipped with rapid action fasteners for attachment to the frame.

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  Engineering Mechanics and machi

  Experimental Set Portal Frame

  The set is intended for use with the universal test frame and demonstrates the elastic deformation of loaded frames. The test specimens are a U-shaped and and S-shaped frame made of steel with a square cross-section. These are subjected to varying loads using sets of weights and the resulting deformation measured. For this purpose, the set includes two precision position measurement gauges. The bearings can be either fixed or free enabling the frames to be evaluated as statically defined or undefined systems. The experimental set-up is quickly and securely assembled using special clamps.

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  Engineering Mechanics and machi

  Experimental Set Redundant Truss

  This set for use with the universal test frame enables the distribution of forces in redundant trusses to be investigated. Due to the range of different fixed length members, numerous plane trusses can be assembled. These are made redundant by the insertion of an additional member of variable length. All members are equipped with full bridge strain gauges. The measuring amplifier is required to display the forces in the members and to further process the measured values on a PC. A set of cables to connect strain gauges and the amplifier is included. The trusses can be loaded using a spindle drive with a ring dynamometer and strain gauge.

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  Engineering Mechanics and machi

  Experimental Set Virtual Work

  Using this experimental set the deformation of a loaded bending bar by forces and moments is considered using the principle of virtual work. The set is intended for use with the universal testing frame . The set contains a test bar that can be clamped at both ends. In this way statically defined or undefined cases can be investigated as required. Forces or moments can be applied at any position, this feature permits different load cases to be investigated. For the determination of forces and deformation mech. dial gauges are used. An additional bearing with a dynamometer is used for the direct measurement of forces on the bar.

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  Engineering Mechanics and machi

  Forces in Various Single Plane Trusses

  This set enables the distribution of the forces in various plane trusses to be investigated using the universal test frame . A useful range of member lengths saves time-consuming adjustment. The members can be quickly and sturdily connected to joint discs using special snap action connectors. For the measurement of the force, all members are equipped with strain gauge bridges. The measuring amplifier is required to display the forces in the members and to further process the measured values on a PC. A set of cables to connect strain gauges and the amplifier is included. The trusses can be loaded using a spindle drive with a ring dynamometer and strain gauge.

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  Engineering Mechanics and machi

  Hydraulic Universal Material Tester

  Due to the clear, straightforward layout of this materials tester, tests can be observed in detail during all phases; this is rarely possible on industrial testers. Nevertheless, the capacity of the tester is sufficient to carry out tests of an industrial nature. Simple operation and robust construction make the tester particularly suitable for student experiments. The tester is a vertical, hydraulically operated pillar tester with direct generation of both tensile and compressive forces. The height of the lower cross-member can be adjusted in steps for coarse adjustment. Cylindrical receptacles on the cross-members make the different experimental set-ups easy to change, e.g. wedge clamps. Force and displacement are measured electronically, and displayed digitally. For experiments specimen according DIN 50125 can be used.

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  Engineering Mechanics and machi

  Hydrodynamic Bearing Apparatus

  The behaviour of a classical journal bearing with hydrodynamic lubrication can be investigated with the apparatus . The experimental capability ranges from the measurement of friction torque under load, to determine the pressure distribution in a journal bearing, to plot a locus curve of a journal and to determine the bearing attitude for different conditions of load and speed. The radial load of max. 500N is adjusted manually with a hand wheel. The drive is an asynchronous motor with frequency converter. All variables (speed, load, friction torque, oil supply pressure, oil peak pressure, oil temperature, X-displacement, Y-displacement) are indicated on 4-digit displays. Five different journals are used to examine bearing clearance. X and Y positions are measured using inductive displacement sensors. The friction torque is measured by means of a lever arm equipped with an electronic force sensor.