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VIBRATION PAD

However, some simple spare parts may be developed in-house, e.g. anti-vibration pads, level indicators, shaft sleeves for pumps, thermowells for instmments, and strainer in pipelines at suction of pumps or instrument probes. [Pg.160]

Provide lock nuts on foundation bolts to prevent their loosening (which can cause vibrations ultimately leading to failure of glands for shafts and bearings). Anti-vibration pads shall also be considered to reduce vibrations. [Pg.246]

Spares shall be procured from original equipment manufacturer and fitted at the earliest to reduce chances of interruptions in plant activities due to breakdowns. However, some simple spare parts may be developed in-house, e.g. anti-vibration pads, level indicators, and shaft sleeves for pumps for cost reduction. Sometimes, old spares may be reconditioned and fitted to start the plant soon or if new spares are not available immediately (e.g. impeller or shaft of a blower). This approach may only temporarily save some cost of inventory as a sudden breakdown may still occur. [Pg.249]

Various techniques are used to promote good hopper flow with poorly flowing materials. A vibrating pad may be used at the base of the hopper to inhibit bridging. An auger... [Pg.44]

The feed hopper feeds the granular material to the extruder. In most cases, the material will flow by gravity, unaided, from the feed hopper into the extruder. Unfortunately, this is not possible with all materials. Some bulk materials have very poor flow characteristics and additional devices may be required to ensure steady flow into the extruder. Sometimes this can be a vibrating pad attached to the hopper to dislodge any bridges as soon as they form. In some cases, stirrers are used in the feed hopper to mix the material (and prevent segregation) and/or to wipe material from the hopper wall, if the bulk material tends to stick to the wall. [Pg.68]

Industrial uses Compressibility Chemical and oil resistance Higher thermostability High abrasion resistance Gaskets, vibration pads, buoys, oil booms, flotation collars... [Pg.641]

The Feed Hopper. The feed throat is connected to the feed hopper and the extruder barrel. The feed hopper holds the plastic pellets or powder and discharges the material into the feed throat. The hopper should be designed to allow a steady flow of material through the hopper. Steady flow is best achieved with a circular hopper with a gradual transition in the conical section of the hopper (see Fig. 9). For difficult bulk materials, special devices, such as vibrating pads, stirrers, wipers, and even crammer screws, can be used to promote steady flow through the hopper so as to force the material to the discharge (see Fig. 10). [Pg.2985]

Industrial uses Compressibility Oil resistance Buoyancy Gaskets, flotation collars, ship fenders, tape backing, vibration pads... [Pg.121]

Fig. 8. Vibration isolators (a) single-spring mount with base plate (b) neoprene mount (c) spring and neoprene hanger and (d) neoprene waffle pad. Fig. 8. Vibration isolators (a) single-spring mount with base plate (b) neoprene mount (c) spring and neoprene hanger and (d) neoprene waffle pad.
Resilient but rigid foundations such as by providing spring mounts or rubber pads for machines on the floor or for components and devices mounted on the machine so that they are able to absorb the vibrations, caused by resonance and quasi resonance effects, due to filtered out narrow band ground movements. The stiffness of the foundation (coefficient of the restoring force, k) may be chosen such that it would make the natural frequency of the equipment... [Pg.452]

Rpm X number of pads (always present). Tonrnal tilt pad bearing Increased vibration with increasing clearance... [Pg.427]

On reassembly, care should be taken to return the tilting-pad and support-ball combination to the original location in the support ring. Changes in clearance and concentricity can result if the tilting-pad and support-ball combination is not returned to the same location. An eccentricity of as little as one mil can cause severe vibration problems. [Pg.756]

The compressor plant should be located in a place with good ground conditions. In some cases, the compressor foundation may have to be isolated from that of the main building so that vibration is not transmitted from compressor to the building structure, and from heavy plant to the compressor. Where the vibrations are slight, resilient pads may be used to advantage. Receiver-mounted units should always be either freestanding or mounted on resilient pads. If in doubt, the suppliers should be consulted. [Pg.547]

The other major source of noise is vibration from the environment. The entire measuring system is, of course, mounted on appropriate rubber isolation pads. However, these are not adequate for the level of accuracy required. The residual vibration is eliminated from the signal by mounting the lower part of the optical reflection system on a spring which is driven by servo electronics that detects its movement. An effective free period for the spring of up to 60 s can be achieved in this way, and virtually all environmental vibration is eliminated from the measured signal. [Pg.168]

Poly( j-phenylene isophthalamide) (structure 4.59), sold under the trade name Nomex, exhibits good thermal stability decomposing above 370°C. It is used in flame-resistant clothing. It is also used in the form of thin pads to protect sintered silica-fiber mats from stress and vibrations during the flight of the space shuttle ... [Pg.107]

In the case of centrifuges, stirring rods, fans, blowers and vibrating containers where often big centrifugal forces show up, they should be dynamically balanced immediately after fabrication and before rubber lining. Sometimes, balancing rubber pads are fixed on the equipment after lining to ensure that the same is dynamically balanced. [Pg.113]

Polyurethanes can be used to develop vibration isolation pads to isolate movements generated in the machinery. Absorption of acoustic vibrations also can be done with polyurethanes. This finds application in submarine coatings for certain temperature conditions. [Pg.158]

Tests such as the tensile strength and tear strength tests evaluate polyurethanes to destruction. When polyurethanes are used in a practical situation, the aim is for them to have as long a life as needed in the application. Stress, strain, and shear are applied to the polyurethane at various frequencies and at different temperatures. There may also be dynamic variations on top of a static load, for example, vibrations on a loaded isolation pad. [Pg.177]

As discussed in Section III, TRPES is sensitive to vibrational and rotational dynamics, as well as electronic dynamics. In this section, we give examples of the use of TRPES to the study of intramolecular vibrational energy redistribution (IVR), and the use of time-resolved PAD measurements as a probe of rotational dynamics. [Pg.546]


See other pages where VIBRATION PAD is mentioned: [Pg.363]    [Pg.284]    [Pg.470]    [Pg.332]    [Pg.178]    [Pg.201]    [Pg.260]    [Pg.3004]    [Pg.156]    [Pg.363]    [Pg.284]    [Pg.470]    [Pg.332]    [Pg.178]    [Pg.201]    [Pg.260]    [Pg.3004]    [Pg.156]    [Pg.319]    [Pg.354]    [Pg.936]    [Pg.314]    [Pg.368]    [Pg.483]    [Pg.332]    [Pg.86]    [Pg.714]    [Pg.247]    [Pg.19]    [Pg.591]    [Pg.319]    [Pg.241]    [Pg.43]    [Pg.508]    [Pg.510]    [Pg.523]    [Pg.543]    [Pg.550]    [Pg.673]   


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