Slip clutch

Safety clutches usually consist of two parts the actual safety clutch and the elastic part, both of which soften vibrations and shocks and equalize any misalignment between motor and gearbox. Essentially, a distinction is made between slip clutches and mechanically disengaging clutches. Despite their higher cost, pneumatic slip clutches are normally used on larger extruders, because they are easy to handle, which means shorter downtimes in case of overload. 

Alkaline treatment of the pulp results in papers with enhanced tensile strength. It is helieved that the alkaline treatment effects hydrolysis reaction of the surface of the polymer. Thus the surface contains an increased amount of amino groups. These materials can be used in slipping clutches. 

Ideally, a four-headed torque driver assembly should be used with each head rotating at the same speed and a calibrated slip-clutch on each driver to prevent overtightening of the stack. 

Mitigating features are classified as aspects of mechanical or electrical plant which are not engineered as interlocks but are inherent (e.g. electric motor torque limits, component strengths, etc) whereas mechanical interlocks are viewed as additional plant introduced to provide independent protection against initiating faults (e.g. slipping clutches, automatic locks, etc). 

The primary advantage of this type of clutch is its ability to transmit full torsional force without any possibility of slip. Its major disadvantage is that the two shafts are instantaneously coupled when the clutch engages. This results in abrupt starts, which may cause excessive torsional shock loads that damage drive-train components. Figure 59.21 shows a positive clutch. 

Although not a design that guarantees positive power transmission, a satisfactorily performing friction clutch will transmit the maximum torque output of the driver to the driven shaft without slip when fully engaged. The automobile clutch is the most common example, transmitting the maximum motor torque to the wheels. 

Sund clenched his teeth and rocked forward in his chair. He nearly let the painting slip from his grasp, but clutched it against his abdomen again. See - what I - mean, he got out between gasps. 

Automatic transmission fluids, ATFs Frictional behaviour is a key performance characteristic of an ATF. During operational lifetime, thermal and oxidation byproducts can form in the lubricant. These have the potential to fill the porous holes found in the surface of the transmission, causing the clutch plates to slip. A dispersant is necessary to keep these by-products suspended in the oil, and typical treat rates vary between 1 and 6%. Additionally, the dispersant can positively affect friction if chosen correctly. A number of reasons for this have been proposed, including... 

In the limited slip differential, clutches apply friction to the shaft of the spinning road wheel. This diverts rotational power to the opposite shaft, allowing the vehicle to gain traction and move off on the slippery surface. 

Limited slip differentials contain clutch plates, which require the correct friction performance to prevent noise and squawk . 

Sometimes the operation of machine elements such as brakes and clutches may result in audible sound, ranging from high-pitched squeals to low-pitched growls. It is often assumed that such sounds are manifestations of stick-slip sliding, but in reality they are the result of frictionally induced quasiharmonic vibration. This aspect of friction has been analyzed and studied experimentally by Brockley and Ko [16, 17],... 

The coupling of these two processes is not unlike the clutch in a car, which couples the energy of the combustion engine to the driving of the wheels and can drive the car up a hill it would otherwise rather mn down. In a car it is possible to slip the clutch, so that the engine races and not much else happens. In the same way, it is possible to uncouple mitochondria totally or partially. This happens to some extent in some fevers. It is also put to use in brown fat , which is very important in hibernating animals but also in human babies. The common link is production of heat instead of ATP. We have talked hitherto of heat production as a waste of energy, but... 

The motor 256 is so designed as to slip electrically when the rack 251 is in contact with the stop 277 and the weight of the rack 251, line 250, and safety rod 176 are counterbalanced through the magnetic clutch 257 by weight 280 attached to the periphery of a pulley 281 mounted on the extension 282 of the sh 254 to reduce the load on the motor. 

If phenomena such as the engagement of a clutch or a change from slip to stick friction is considered as a discrete event then the instantaneous mode change results... 

Stmctural changes such as the engagement and disengagement of a clutch or the change between slip and stick mode for two rigid bodies considered as instantaneous... 

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