Couplings, Clutches And Brakes

Question 1

This coupling is used in low speeds and low torque applications ,also they have keyway in the bore and sort screws tighten the coupling on the shaft , what type of coupling is this ?

Answer 1

Sleeve couplings

Question 2

These couplings grip the shaft by using tapered sleeves in tapered hubs , these couplings are used on equipment with light to moderate loads

Answer 2

Compression couplings

Question 3

These couplings have two halves bored or keyed to fit in the shafts , the flanges may also be mounted to the shaft by heavy interference fit or taper fit
What coupling is this

Answer 3

Flange face couplings

Question 4

This coupling have two sprockets keyed to shafts connected connected with chain
What is this coupling called ?

Answer 4

Roller chain coupling

Question 5

This coupling is recommended for heavy - duty drives up to 5000 rpm , this coupling also runs quietly

Answer 5

Silent chain coupling

Question 6

This coupling operates quietly and smoothly and often used for light power transmission drives
Which coupling is this

Answer 6

Synthetic chain coupling

Question 7

This coupling uses a flexible element , which is molded into a shape like a tire

Answer 7

Rubber tire coupling

Question 8

This coupling transfer torque through and elastomeric element , the rubber that is used is bonded to metal inserts that bolt to the hubs

Answer 8

Elastomeric couplings

Question 9

This coupling uses rubber or neoprene biscuit molded to steel sleeves , these biscuit allow considerable deflection , torsional flexibilty ,axial float during operation

Answer 9

Pin and biscuit coupling

Question 10

What’s a major advantage of a rubber tire coupling ?

Answer 10

Is that the driving element case be changed by simply loosening of the side flange bolts

Question 11

This coupling uses a series of thin plates to form a flexible steel disc

Answer 11

Flexible metal disc coupling

Question 12

If single set of disc is used for a metal disc coupling only tolerate angular misalignment this true or false ?

Answer 12

True

Question 13

Two of sets of disc for a flexible disc coupling are used produce what more angular and offset , true of false ?

Answer 13

True

Question 14

This coupling has two hubs with slotted flanges , what coupling is this ?

Answer 14

Steel grid couplings

Question 15

This coupling consists of two metal hubs , which have three machined or cast jaw sections with the spider , what is the name of this coupling

Answer 15

Jaw and spider

Question 16

This coupling consists of pairs of cast iron or steel flanged hubs , these hubs are also not recommend on drives where excessive misalignment is likely to occur

Answer 16

Pin and rubber bushing coupling

Question 17

This is is coupling is used between the driver and the driven

Answer 17

Double Universal joint

Question 18

This coupling consists of two operating members , the Impeller sometimes referred to as a pump and the turbine , which can also be called a runner , what coupling is this

Answer 18

Fluid coupling

Question 19

This coupling uses mechanical contact between the friction shoes and the drum , but application is by , what is the called ?

Answer 19

Centrifugal shoe coupling

Question 20

These clutches are usually engaged by mechanaily shifting levers and this clutch can be engaged at very low speeds , but can disengaged as long as it’s not making high tourque.
. Power transfer is jaw to jaw contact
. Accusation method is mechanical sliding one jaw by a lever , electric Solenoid , pneumatic cylinder or hydraulic cylinder

Answer 20

Square jaw a clutches

Question 21

The clutch can be engaged at higher speeds than the square jaw

Answer 21

Spiral jaw clutches

Question 22

This clutch can be activated mechanically or electrically ,one hub of the clutch must be free to slide on a key or spline to allow for engagement
.power transfer is tooth to tooth contact
. Actuation method is most often by electric solenoid

Answer 22

Multiple tooth clutches

Question 23

Uses a activated magnetic field that pulls a moveable armature with friction disc mounted on its face

Answer 23

Electromagnetically activated

Question 24

This cluch uses wedging power , the smaller the angle the greater the wedging power

Answer 24

Cone clutches

Question 25

If the load on the output exceeds the strength the clutch slips , they are used for light high speed applications

Answer 25

Hysteresis

Question 26

These clutches consist of two drums running very close to each other , similar to hysteriss clutches expect have soft iron rotors

Answer 26

Eddy current clutches

Question 27

These are used in extremely low power applications and moderate large torque loads , the more wraps on the spring the greater the power it can transmit

Answer 27

Wrap - spring clutches

Question 28

This coupling need no lubrication. In this type of coupling, a flat centre member is connected between metallic disks which are bolted to the hubs.This is a double-engagement coupling. The transinission of power is from hub to disk to centre member to other disk to other hub. This coupling allow highspeed operation and are well balanced. Torsional characteristics are very stiff and allow this coupling to be used where no backlash is permitted.

Answer 28

Metallic disk couplings

Question 29

This coupling transmits the torque between the driver and the pump adequately if the shafts rotate in the direction of the thread of the coupling.

Answer 29

Threaded coupling

Question 30

are used in heavy load and torque services. The two halves of the coupling are split parallel to the shafts' axes and have machined keyways in both shafts. They can be made of steel or cast iron. Over-tightening the cast iron couplings can lead to

Answer 30

Ribbed couplings

Question 31

These couplings are not recommended on drives where excessive misalignment is likely to occur. Misalignment causes the bushings to wear quickly, and an increase in vibration may result. This coupling works well on reversing drives and can compensate for some axial end float between the machine's shafts.

Answer 31

Pin and rubber bushing coupling

Question 32

are used to connect shafts that intersect at angles greater than can be accommodated by flexible couplings. If the alignment is too accurate the needles in the joint do not rotate. This may cause false brinelling and lubrication problems. There are many applications for universal joints in industrial applications. The three types of universal joints are: single, double, and constant velocity.

Answer 32

Single Universal joint

Question 33

are used where the joint angles are unequal (Figure 33) or when a single CV joint is used and constant velocity output is required. They produce a very even and smooth transfer of power with no fluctuations in speed. These can be made in several ways.

Answer 33

Cv joints

Question 34

BThe impeller (pump) has a series of radial blades. The turbine (runner) is the output member and consists of a series of radial blades. The impeller and the turbine blades face each other (Figure 37).

Answer 34

Fluid coupling

Question 35

Thus coupling usees a mechanical contact between the ——— and the drum, but application is by centrifugal force. The coupling allows the prime mover to reach partial speed before the load is fully engaged. This is useful on drives with frequent stops and starts under heavy loads. couplings are equipped with springs that determine engagement chara

Answer 35

Centrifugal shoe coughing

Question 36

sleeve couplings, roller chain couplings, rubber tire couplings, steel grid couplings, jaw and spider couplings and splined rubber couplings.

Answer 36

Low hp couplings

Question 37

.This clutch uses an electromagnetic coil to generate an magnetic filed . They are used for light high speed applilcations . There power transfer is electromagnetic

Answer 37

Hysteresis