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Mechanics Personal > Couplings > Flashcards

Couplings Flashcards

1
Q

What do couplings do?

A

Connect two shafts that turn in the same direction on the same centerline

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2
Q

What are the three major types of shaft couplings?

A

Rigid
Flexible
Universal Joint

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3
Q

What are the three types of rigid couplings?

A

Flange
Sleeve
Ribbed

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4
Q

What is the simplest type of coupling?

A

Rigid

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5
Q

What major type of coupling has the highest size for size torque transfer?

A

Rigid

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6
Q

Pros of Rigid couplings?

A

Low maintenance
No Lubricant
High torque transfer

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7
Q

Cons of Rigid couplings?

A

No machine protection

Must provide and maintain perfect alignment

Has to have proper bearing support

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8
Q

What rigid coupling connects the same or different diameter shafts accommodates some misalignment and has heavy duty applications?

A

Flange couplings

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9
Q

Pros of flange couplings?

A

No lube

Minimum maintenance (tighten bolts)

Easy install and removal

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10
Q

Couplings that connect the same or different size shafts has the least amount of torque transfer and uses set screws to keep from sliding on shaft?

A

Sleeve couplings

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11
Q

Rigid coupling with the most torque transfer, connect shafts of the same size, and maintenance free?

A

Ribbed couplings

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12
Q

What type of couplings allow some misalignment?

A

Flexible couplings

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13
Q

Three types of shaft misalignment?

A

Angular

Parallel

Axial (end play, end float)

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14
Q

What are some other functions of flexible couplings?

A

Protect equipment
Damper from shock and vibration
Insulate from thermal and electrical
Measure input and output speed

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15
Q

Are all general purpose coupling similar?

A

Yes considered “off the shelf”

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16
Q

Mechanically flexible coupling with High torque at high speeds with two hubs with external gear teeth and accommodate misalignment through backlash?

A

Gear couplings

17
Q

What is backlash?

A

Engineered clearence for
Lube
Misalignment
Thermal expansion

18
Q

What does crowned teeth do on gear couplings

A

More misalinement

19
Q

What is most power - dense flexible coupling?

A

Gear couplings

20
Q

How often do you lube gear couplings?

A

At least once a month

21
Q

Two hubs with sprockets mated with double roller chain

A

Chain couplings

22
Q

What flexible coupling is best for shock and vibration?

A

Chain couplings

23
Q

Three types of chain couplings?

A

Double roller
Silent
Plastic

24
Q

Most common chain coupling and suitable for moderate speed and load?

A

Double roller chain coupling

25
Q

Chain coupling for heavy drives and high torque most power transfer of chain couplings?

A

Silent chain couplings

26
Q

Chain coupling that uses nylon and requires no lube, light loads, corrosive areas?

A

Plastic chain couplings

27
Q

Flexible coupling with two hubs with multiple slots with grid that goes in slots?

A

Grid coupling

28
Q

What do covers do for grid couplings?

A

Retain lube

Prevent contamination

Act as safety device

29
Q

What coupling is for large misalignment? 90 degrees

A

U joint

30
Q

Three types of flexible couplings?

A

Gear coupling
Grid coupling
Chain coupling

31
Q

Three types of U joints?

A

Pin and block
Cross and bearing
Single and double U Joint

32
Q

Two hubs with drilled ears, center block, two pins?

A

Pin and block

33
Q

What ujoint operates through friction?

A

Pin and block

34
Q

U joint with two Ushaped Hubs cross shaped peace and needle bearings at end?

A

Cross and bearing

35
Q

U joint with no parrelle misalignment and can operate in minimal space?

A

Single ujoint

36
Q

Two single u Joints butted together?

A

Double u joints

Mechanics Personal (13 decks)

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