Hydraulics - Seafish

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100 SAQ13 The 2 basic types of filter elements are: (a) Wire mesh or disc type for coarse filtering. This type is re-usable. (b) Paper, or other material, cartridge type which cannot be cleaned but must be replaced. SAQ14 a) Flow to Port A (A) From Pump (P) (B) Raise Hold / -vLower (T) To Reservoir b) Flow to Port B From Pump (A) (P) | a(B) Raise Hold xLower (T) To Reservoir <strong>Seafish</strong> Open Learning
101 SAQ15 SAQ16 A linear actuator provides straight line motion. A rotary actuator provides circular motion. A semi-rotary actuator provides an oscillating motion, that is, circular motion but only backwards and forwards - not a complete revolution. A good example is the actuator for a steering gear, Figure 33(a) on page 20. Seatish Open Learning
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SEA FISH INDUSTRY AUTHORITY Hydraul
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Hydraulics in Fishing Vessels An Op
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SEGMENT FIVE - HYDRAULIC OILS AND F
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A Guide for Open Learners This will
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VII S.A.Q/S are shown by a box with
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IX • Time spent just reading a mo
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XIII Objectives After completing th
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Working cylinder V 7 3 •< ► Loa
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Write down a list of the main compo
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In this type the rotor shaft is off
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8 Pressure Control Valves Positive
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10 Relief valves are either pre-set
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12 (A) From Pump (P) i a(B) Raise H
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14 Out Out Globe valve Figure 17. S
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16 (?) SAQ25 Explain how a relief v
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18 The cylinders shown in Figures 2
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20 Figure. 31. Figure 32. Port A Po
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22 Which types of pumps can be used
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24 Hydraulic Pressure The pressure
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26 In order to help you to compare
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28 ® SAQ18 Using Figure 35 on page
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30 ® SAQ29 When a hydraulic motor
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32 Rotor Inlet External Gear Pump F
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34 The vanes are pushed out by cent
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36 Piston Pumps All piston pumps de
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38 Drive shaft flange Piston Yoke c
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40 Eccentric Oil outlet Figure 49.
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43 Segment Four — Hydraulic Syste
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45 K4SS^^ LINES AND LINE FUNCTIONS
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47 PUMP ONE-WAY VARIABLE OUTPUT PUM
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49 • Pilot pressure means that oi
Page 71 and 72: 51 ® A reversible motor with a bra
Page 73 and 74: 53 (?) SAQ15 Using the information
Page 75 and 76: 55 First, identify each of the item
Page 77 and 78: 57 ® SAQ28 Using the diagram of Fi
Page 79: 59 SUMMARY You have now completed S
Page 83 and 84: 62 PROPERTIES OF HYDRAULIC OILS The
Page 85 and 86: 64 (2) SAQ20 How is the viscosity o
Page 87 and 88: 66 (?) SAQ26 Using Table 3 determin
Page 89 and 90: 68 Additives in Hydraulic Oils Many
Page 91 and 92: 70 CONTAMINATION Dirt and other for
Page 93 and 94: 72 • Metal wear particles • Pac
Page 95 and 96: 74 Full flow filters are all fitted
Page 99 and 100: 77 Segment Six — Maintenance and
Page 101 and 102: 79 Cleanliness has top priority.
Page 103 and 104: 81 Do not 'grip' a hot pipe. Try a
Page 105 and 106: 83 Faulty Seals Faulty Seals on pum
Page 107 and 108: 85 Excessive Noise Table 4 Seafish
Page 109 and 110: 87 Incorrect Flow Table 6 Seafish O
Page 111 and 112: 89 Faulty Operation Table 8 Seafish
Page 113 and 114: 93 So you can see that there are ma
Page 117 and 118: 95 Responses to the Self Assessment
Page 119 and 120: 97 SAQ 6 Did you show the change in
Page 121: 99 SAQ9 The various properties whic
Page 125 and 126: 103 SAQ20 (a) Viscosity increases a
Page 127 and 128: 105 SAQ26 SAE 20W/30 oil will have
Page 129 and 130: Other modules in this series which
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Hydraulics - Seafish

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