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INSP 350 > MOD 6 PUMPS > Flashcards

MOD 6 PUMPS Flashcards

1
Q

If we want high volume, and low pressure, what type of pump would we use?

A

Vane pump

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2
Q

What is the most common constant displacement type pump?

A

Gear Pump

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3
Q

Hydraulic hand pumps can be?

A

Single or Double acting

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4
Q

In a hydraulic system with a constant displacement pump, what must we have to prevent system damage?

A

Pressure relief

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5
Q

In the gear type pump, how does the fluid flow through the pump?

A

The fluid is trapped between the gear teeth and the wall body of the pump, where it is moved to the outlet side of the pump

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6
Q

What is the function of a pump in a hydraulic system?

A

Move fluid through the system

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7
Q

In the Gerotor pump, the driven rotor has how many more teeth than the drive gear?

A

1

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8
Q

The variable displacement pump utilizes what to lengthen or shorten the effective stroke of the piston?

A

Compensator assembly

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9
Q

Similar to a basic electrical circuit, in a basic hydraulic system, the fluid flows from the pump to______, ______, ______, ______?

A

Flowmeter, pressure gauge, valve (restrictor), reservoir.

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10
Q

How do we cool a Variable displacement pump??

A

Bypass some fluid back to the reservoir

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11
Q

Is the pump given for this work sheet a: (Gear Type Pump) Constant displacement Or Variable displacement

A

Constant displacement type

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12
Q

A gear type pump operates by allowing the fluid to go from the inlet: -Through the center of the teeth between the 2 gears and to the outlet. Or -Between the teeth and the housing where meshing of the 2 gears drives the fluid to the outlet

A

Between the teeth and the housing where meshing of the 2 gears drives the fluid to the outlet

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13
Q

In most cases, when installing a gear type pump, is it necessary to coat the drive spline and the engine drive spline with a good approved lubricant?

A

yes

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14
Q

What is the purpose of the weak relief valve used to control case pressure located in the gear pump cover? -Ensures the lubricating fluid always goes to the outlet side of the pump or -Prevents air from entering into the pump body and hydraulic system though the drive gear shaft, should the seal fail

A

-Prevents air from entering into the pump body and hydraulic system though the drive gear shaft, should the seal fail

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15
Q

Why do the floating bronze bearings have an “O” ring under the flange? (Gear Type Pump) -To allow pump out put pressure to push the bronze bushing against the side walls of the gears and create a better seal at high system pressures. Or -Allows the pump to rotate in either direction and still have the fluid flow in the same at the inlet and outlet.

A

To allow pump out put pressure to push the bronze bushing against the side walls of the gears and create a better seal at high system pressures.

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16
Q

Where does the lubricating pressure originate in the gear type pump?

A

Between the pump gear teeth as they mesh together.

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17
Q

In the gear type pump a minimum side clearance between the gears and the body bearing flange is reduced by pressure from the discharge port and the force is applied against the gear by the floating bearing, this is called:

A

Pressure loading

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18
Q

When installing the gear type pump, at what location should the seal drain line be positioned?

A

At the bottom or lowest 1/8” plug fitting and run the line into the slip stream

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19
Q

On the model gerotor pump that you have, how many teeth does the spur driving gear have?

A

4

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20
Q

On the model gerotor pump, how many teeth does the internal gear rotor have?

A

5

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21
Q

Which way does the model you have (gerotor pump) rotate viewed from the top of the pump or inlet outlet side

A

Left hand (ccw)

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22
Q

When considering the relief valve, does direction of rotation matter in the model gerotor pump?

A

yes

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23
Q

Considering the 4 vertical oil lines in the case lining of the pump, from where does the lubricating oil pressure originate? (Gerotor Pump)

A

from the spur driving gear and is pushed internally through the gear rotor

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24
Q

What purpose does the 1/10” hole in the relief valve have? (Gerotor Pump)

A

allows fluid to flow from the outlet to the inlet

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25
Q

Strato Power 67V Series Pump. What function does the check valves located in the pressure annulus have?

A

allow the pump pistons to create a low pressure on the intake stroke

26
Q

Strato Power 67V. Is the piston stroke of this pump constant or variable?

A

Constant

27
Q

Strato Power 67V. Is the pump a: variable volume type or constant volume type

A

variable volume type

28
Q

Strato Power 67V. When does the spring guide shut off the inlet flow of fluid by closing completely? -when fluid goes directly to the reservoir from the pump or -does not shut off the fluid flow going through the pump and never closes completely

A

does not shut off the fluid flow going through the pump and never closes completely

29
Q

Strato Power 67V. What prevents the discharge pressure from flowing to the inlet side of the pump when pump rotation stops?

A

check valves

30
Q

Strato Power 67V. What is the primary purpose of the pilot piston? -to move the valve piston against the pressure control spring and also allow fluid to go to the reservoir during a no flow condition or -close off the inlet flow and reduce flow into the pump causing a non-flow condition

A

to move the valve piston against the pressure control spring and also allow fluid to go to the reservoir during a no flow condition

31
Q

Strato Power 67V. When does the pump allow cooling and lubrication fluid to return directly to the reservoir through the bypass?

A

when the pump goes into a no flow condition

32
Q

Strato Power 67V. What are the reasons for having radial holes located in the thickest part of the cam plate?

A

aid in the balancing of the drive cam and create a lubricating pressure and circulation of fluid in the bottom of the pump near the drive cam

33
Q

Strato Power 67V. Explain how the cutaway strato power 67 pump goes into a no flow condition from a full flow position. Use training manual terms to describe the event and movement. (Value – 5).

A

During full flow operation the discharge pressure is insufficient to move the pilot piston against the force of the valve spring as flow requirements reduced, the discharge pressure is restricted, therefore pressure increase and the pilot piston move cutting up the fluid intake, in this position the pilot piston clears the bypass passage and fluid flows from discharge

34
Q

Is the pump Strato Power 66W a constant or variable displacement type pump?

A

Constant

35
Q

Strato Power 66W . Is the piston stroke constant or variable?

A

constant

36
Q

Strato Power 66W What prevents the discharge pressure from flowing to the inlet side of the pump when pump rotation stops? -check valves in discharge annulus or sleeves on the pistons cover the relief holes

A

check valves in discharge annulus

37
Q

Strato Power 66W When the pump goes into a no flow condition which of the following statements is most correct? -system pressure or back pressure pushes on the compensator piston and moves the sleeves to the discharge end of the pump or -the system pressure or back pressure pushes on the nutating plate and moves the collars to the discharge end of the pump

A

System pressure or back pressure pushes on the compensator piston and moves the sleeves to the discharge end of the pump

38
Q

Strato Power 66W When the pump goes into a full flow condition which of the following statements is the most suitable? -system pressure pushes on the compensator piston and moves the sleeves to the drive end of the pump or -compensator spring pushes the sleeves to the inlet end of the pump

A

compensator spring pushes the sleeves to the inlet end of the pump

39
Q

Strato Power 66W. From what location does the compensator piston get its fluid pressure? -the centrifugal pump inside the cam supplies the pressure or -the allen screw (hex) port in the end of the body which houses the pistons and the orifice faces the discharge end of the pump

A

the allen screw (hex) port in the end of the body which houses the pistons and the orifice faces the discharge end of the pump

40
Q

Strato Power 66W. What is the purpose of the RES (bypass) fitting? -allows cooling and lubricating fluid flow to go to the reservoir only when the pump goes into a no flow condition or -allows cooling and lubricating fluid flow to go to the reservoir any time the pump is operating

A

allows cooling and lubricating fluid flow to go to the reservoir any time the pump is operating

41
Q

Strato Power 66W. What is the purpose of the 4 seal drain ports? -to prevent fluid leaks at the pump drive spline or -allow for pump position mounting and leakage from the engine accessory pad

A

allow for pump position mounting and leakage from the engine accessory pad

42
Q

The Strato Power pumps as per given instructions (time dated material) should be removed from the aircraft engine and bench checked every:

A

1000 hours`

43
Q

GEAR TYPE PUMP

what is number 1

A

•1. Gear pump

44
Q

what is number 6

A

spur gears

45
Q

what is number 5

A

drain plug

46
Q

what is number 4

A

pressure control spring

47
Q

what is number 3

A

spline drive

48
Q

what is number 2

A

Rotacional plug

49
Q

What is number 1 and 6

A
    1. Note alignment markings
    1. Relief valve
50
Q

What is 3 and 5

A
    1. Gear rotor
    1. Pump head
51
Q

What is 2 and 4

A
    1. Spur Driving Gear
    1. Gear cover plate
52
Q

What is number 5

A

•5. Reservoir outlet

53
Q

What is number 3 and 4

A
    1. Drive cam
    1. Pressure outlet
54
Q

What is number 1 and 2

A
    1. Pump drive
    1. Case drain
55
Q

what is number 5 and 6

A

•5. Bypass port

  1. Pressure from pump outlet
56
Q

what is number 3 and 4

A
    1. Pilot piston Liner
    1. Pilot piston
57
Q

what is number 1 and 2

A
  1. Valve Piston
  2. Valve Liner
58
Q

what is number 6

A

6.Fluid inlet

59
Q

What is number 5 and 6

A
    1. Pump pressure control spring
    1. Cylinder block
60
Q

What is number 3 and 4

A
  1. Piston Sleeves
  2. Pump inlet
61
Q

What is number 1 and 2

A
  1. Nutating plate
  2. Drive cam
62
Q

what is the name 7,8,9

A
  1. Creep plates
  2. Drive cam
  3. Control orifice

INSP 350 (6 decks)

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