Shaft joints

In general, there are two ways to assemble shaft joints ... 

Mengel, R., Haeberle, J., Schlimmer, M., 2007. Mechanical properties of hub/shaft joints adhesively bonded and cured under hydrostatic pressure. Int. J. Adhes. Adhes. 27 (7), 568-573. 

Unbonded interference-fit samples were prepared by using the press-fitted hub/shaft joints and tested in static axial pull-out in order to understand the strength contribution of the interference-fit alone (Gallio et al., 2014). Assuming the same friction coefficient between steel and steel for all the... 

After application, most structural adhesives cure at room temperature, with full cures taking hours to several days. Curing can be accelerated by heating in hatch or continuous ovens, by microwave curing [5] or by induction heating [6, 7]. The strength of hnh/shaft joints bonded with acrylic and epoxy adhesives was fonnd to increase if curing... 

Cooling tower Threaded pipe joints Bolts, nuts, washers Partially exfoliated coatings Lap joints in sheet metal Between bushings and shafts on pumps Pump gaskets... 

Expansion joint bellows Exhaust supports Bearing support Bearing ease eover Shaft Disk... 

Using a rear-wheel-drive vehicle as an example, a prop shaft delivers power from the transmission output, near the middle of the vehicle, to the differential that drives the wheels at the rear. If this prop shaft is designed to be stiff, which is normally the case, it could not be rigidly attached to the transmission output at one end and the differential at the other because of the differences in vertical movement between the drive wheels and the chassis. Typically, two universal joints are inserted into the drivetrain to accommodate this situation. 

Following the operating principle of the most commonly used universal joint, the input shaft and the output shaft both terminate in yokes that are oriented in mutually perpendicular planes. The branches of each yoke are pinned to a cross connector so that each yoke can pivot about its beam of the cross. This mechanism was employed in the sixteenth century by Italian mathematician Geronimo Cardano, who used it to maintain a shipboard compass in a horizontal plane, regardless of the movement of the ship. Consequently it is often called a Cardan joint. 

Figure 14-16F. Cutaway of large steam turbine, multistaged, multivalve, for driving mechanical rotating equipment. Connection to mechanical driven equipment shaft shown as a flange joint on right end of turbine shaft. Exhaust steam is at lower right, inlet steam is at bottom center near smaller wheels. (Used by permission Bui. 8908-E0MD. Dresser-Rand Company.)...

Jackshafts Some machine-trains use an extended or spacer shaft, called a jackshaft, to connect the driver and a driven unit. This type of shaft may use any combination of flexible coupling, universal joint, or splined coupling to provide the flexibility required making the connection. Typically, this type of intermediate drive is used either to absorb torsional variations during speed changes or to accommodate misalignment between the two machine-train components. 

Because of the length of these shafts and the flexible couplings or joints used to transmit torsional power, jackshafts tend to flex during normal operation. Flexing results in a unique vibration profile that defines its operating mode shape. 

In relatively low-speed applications, the shaft tends to operate in the first mode or with a bow between the two joints. This mode of operation generates an elevated vibration frequency at the fundamental (lx) turning speed of the jackshaft. In higher-speed applications, or where the... 

Figure 44.3 illustrates a typical double-pivot universal joint. This type of joint, which is similar to those used in automobiles, generates a unique frequency at four times (4x) the rotational speed of the shaft. Each of the pivot-point bearings generates a passing frequency each time the shaft completes a revolution. 

Proper tension is essential when installing a new chain. A tight chain causes an additional load, which increases wear on chain joints, sprocket teeth, and shaft bearings. A slack chain produces vibration, which may result in excessive chain wear, noise, or shock loading. 

The two balls, A and B, are connected, by jointed rods, with the sliding pieces C, D. If the shaft XY is rotated, A and B move further apart, and C and D approach each other as though attractive forces were operative between them This is due to our considering C and D as a complete system, whereas it is in reality part of a larger system, and when we consider the complete system we see that it behaves as if it A were acted on by no forces and possessed no energy other than kinetic. ... 

I. Leakage—joints and packing this factor accounts for the possibility of leakage from gaskets, pump and other shaft seals, and packed glands. The factor varies from 0.1 where there is the possibility of minor leaks, to 1.5 for processes that have sight glasses, bellows or other expansion joints. 

Fig. 2.43. Schema of a steam-sterilizable closing mechanism for vials. The pressure plate (1), by which the stoppers are pushed into the vials is sterilized jointly with the chamber. The shaft (2) to which the pressure plate is connected, moves into the chamber during stoppering. It is not sterilized with the chamber. Therefore the shaft is sterilized in a separate chamber (3). This chamber can also be connected to the vacuum pumping system (4) as to the steam supply (5). Water condensing during the sterilization can be drained by (6). A special seal (7) can (by (8)) also be connected to steam or vacuum, and be sterilized (schematic drawing from information by AMSCO Finn-Aqua, D-50354 Hiirth).

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