Spring tension

Change percentage balance of seal faces or increase spring tension. 

The brush spring tension. Brush pressttre, when measured, using finger spring balance, should be between 1.30 and 200 N/cnr. 

The mechanics don t have to take complicated and confusing installation dimensions with respect to spring tension and face loading. 

If there is a chemical incompatibility between the liquid and an o-ring rubber compound, or if heat is generated from too much spring tension, this will be evident within a few hours or days. Galvanic corrosion or inadequate spring tension w ill reveal itself in a few weeks. 

With the indicator fixed to the volute mounting collar, place the needle on the end of the shaft (Figure 14-23). Push and pull the shaft axially by hand (see the arrows). This will read the tolerance in the axial bearing. This tolerance affeets the. spring tension holding the faces together. If the play in the axial bearing is too loose, the movement can open or even crush the seal faces. 

FIGURE 51-5 Slow adaptation by hair cells. (A). Resting hair bundle. (B) An excitatory deflection lets in Ca2+ (green) and increases the tension felt by the motor (blue). (C) The adaptation motor responds to Ca2+ and high force by slipping towards the base of the stereocilium (black arrow). (D) When the bundle is returned to rest, gating spring tension is low and the motor can climb towards the tips of the stereocilia (black arrow in A). 

On spring-operated valves the adjustable spring tension offsets the inlet pressure. The relief set pressure is usually specified at 10% above the normal operating pressure. To avoid the possibility of an unauthorized person changing this setting, the adjustable screw is covered with a threaded cap. 

Take a closer look at the discharge portion of the indicator card shown in Fig. 29.3. Note that the cylinder internal pressure rises well above the discharge-line pressure, before gas is pushed out of the cylinder and into the discharge line. This is a consequence on the spring tension of the discharge valves. 

In order to force these valves open, a certain amount of extra pressure in the cylinder is needed. The extra pressure overcomes the spring tension. Once the valve is open, gas flows out of the cylinder, into the discharge line, and the cylinder pressure falls. But, as shown on the indicator card, the discharge valve apparently opens and closes five times during one cycle. 

The Soviets and British have used a lead-creep delay since World Warn. Its operating principle is based on metals stretching under tension and is much less affected by temperature. A wire under spring tension will cut its way through a metal tab of a given thickness and width. By using different sizes and types of metals in this tab, delays ranging from 15 minutes to several weeks arc possible. 

Intrahepatic biopsy is performed as swiftly as possible using standard instruments (available as a disposable set with a Menghini needle) this ensures the shooting of the biopsy needle into the liver after release of the spring tension (based on the principle of the spring-loaded needle). Today s high-speed biopsy sets are obtainable... 

These tertiary crushers employ smooth or toothed heavy-duty impact and abrasion-resistant steel-rimmed rolls. The rolls are mounted inline in a horizontal manner and turn toward each other at equal speeds to create a nip into which a friable feed material is introduced (Fig. 4). Heavy-duty compression springs with automatic reset are used to dampen crushing shock and to protect the crusher from tramp iron and oversize material. An adjustable screw that adjusts spring tension changes the crusher opening. A flywheel is used to even out pulses and economize on power consumption. These crushers have a theoretical maximum reduction ratio of 4 1 and will only crush materials to about 10 mesh. Roll crushers produce a controlled product size distribution without a lot of fines. The narrow particle size distribution is achieved by controlling a combination of variables including roll speed, gap measure, differential speed, feed rate, and roll surface. 

Author s note The ceramic two-part spring tensioned ion shutter is unique to PCP, Incorporated, drift tubes at least from the mid-1980s. No open reference to this design is known. 

Belleville spring—A curved, springy piece of steel or plastic, mostly circular, sometimes with a center hole used as a spring tension washer or, arranged to flip over, as a driving force on the percussion primer of an AP (antipersonnel) mine or for other uses of mechanical force. 

The processing industry harnesses energy from seven basic forms electrical, pneumatic, hydraulic, compressed gases, liquids, gravity, and spring tension. Every year, industry records severe injuries because process employees fail to disconnect electrical equipment, dissipate residual energy, and restart equipment accidentally. Year after year, most LOTO... 

These pins are made from spring steel wrapped round to form a slotted tube. Fig. 12.6. The outside diameter is produced larger than the standard-size drilled hole into which it is to be inserted. When inserted in the hole, the spring tension ensures that the pin remains securely in position and caimot work loose. A chamfer at each end of the pin enables it to be easily inserted in the hole, where it can be driven home using a hammer. 

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