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Prepared by
A.Prasadroshan
prasadroshan1982@gmail.com
1
Hydraulic system consists of following components
Power sources units:
1) Tank or reservoir Pressurized tanks, Vented tank...
Hydraulic
Systems
3
Basic Components in Hydraulic Systems
4
5
6
1.RESERVOIR
7
8
9
10
How Reservoirs Work
11
12
2. Filters
13
14
15
16
17
18
Hydraulic oil contamination
19
Particles In Hydraulic Oil
20
Contaminant Types And Causes
21
Abrasion Classes
22
23
24
25
26
27
28
A hydraulic hose is a high-pressure, synthetic
rubber, thermoplastic or Teflon reinforced hose
that carries fluid to trans...
30
31
32
33
34
35
4. Hydraulic steel PIPES
It also carries fluid to transmit
force within hydraulic machinery
36
37
38
• Positive displacement
pump (Gear Pump): a
specific amount of fluid
passes through the pump
for each rotation
• Centrifug...
Positive displacement vs Centrifugal pump
Curve
40
PISTON PUMPS
PLUNGER PUMPS
DIAPHRAGM PUMPS
RECIPROCATING PUMPS
GEAR PUMPS
LOBE PUMPS
SCREW PUMPS
CAM PUMPS
VANE PUMPS
ROTA...
42
• Displacement relates to how the output of the pump reacts to
system loads
– Non-positive-displacement pumps produce flow...
• A non-positive-displacement pump has large
internal clearances
– Allows fluid slippage in the pump
– Results in varying ...
Key Feature of a V-Displacement
Pump
• Fixed Displacement Pump
–A fixed volume of fluids
will be provided in each
revoluti...
46
47
48
Vane Pumps
49
50
51
52
53
54
55
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Internal
Gear
Pump
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Internal Gear Pump
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Internal Gear Pump
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• Operation of a lobe pump
60
• A typical screw pump
61
Operation Principle of Piston Pumps
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63
64
A rotor-gear pump is a variation of the internal-gear pump.
65
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Rotor-gear Pumps
67
68
69
Hydraulic oil cooler
70
If the pump is the heart of a hydraulic system then
the valve is the brain.
Valves are used to perform a large variety of
...
72
Form:
a) Spherical
b) c) d) e) Conical
f) Plate
g) Spool valve
Poppet
valve
Aspects of classification
73
Flow valvesBasics:
The velocity of hydraulic cylinders can be influenced by the flow rate.
This can be done by an adjustab...
75
Flow Control
Valves
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77
78
Control Valves Regulating Valves
Restrictor Orifice One Way Two Way
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80
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(a) In flow control (b) out flow control
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Pilot pressure to open check valve
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SHUTTLE VALVE
90
1. Relief valves
2. Unloading valves
3. Sequence valves
4. Pressure-reducing valves
5. Counterbalance valves
6. Safety Val...
92
93
94
Pressure relief
valve
95
1- Direct Acting Relief Valve
(PRV)
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Fs > Fp
Fs < Fp
98
Pressure relief
valve
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100
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102
Normal flow, no over load
Pressure relief valve
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2- Pilot-Operated Relief Valve
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105
2- Pilot-Operated Relief Valve
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2- Pilot-Operated Relief Valve
107
Unloading valves
108
Unloading valves
109
Sequence valves
110
Sequence valves
111
112
Pressure
reducing
valves
113
Pressure-reducing valves
114
Counterbalance valves
115
Counterbalance valves
116
117
118
119
120
Directional Control Devices
• Typical spool valve
121
122
123
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125
126
127
128
129
130
131
132
133
134
135
136
Solenoid Operated Spool Valves
137
138
139
140
141
142
ACTUATORS
 Hydraulic actuators convert the fluid power
from the pump into mechanical work.
 A hydraulic cylinder is a li...
144
145
146
147
148
149
150
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Telescopic Cylinder
152
HYDRAULIC MOTORS
 The function of hydraulic motors is the
opposite of hydraulic pumps:
 Pump
 It draws in oil and displ...
154
GEAR MOTORS
155
156
157
158
159
160
161
162
163
164
165
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Fundamental of hydraulic components

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Hydraulic components--- Tanks, filters, pumps, heat ex changers, valves( speed control valves, check valves, direction control valves, ) Actuators, Hydraulic motors, accumulators, testers.

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Fundamental of hydraulic components

  1. 1. Prepared by A.Prasadroshan prasadroshan1982@gmail.com 1
  2. 2. Hydraulic system consists of following components Power sources units: 1) Tank or reservoir Pressurized tanks, Vented tanks, Oil cooler 2) Filters Suction filter, return line, Pressure line filters 3) Hydraulic Piping Hose , Pipe, Fittings, Pressure gauge, Temperature gauge 4) Positive displacement Pumps Internal/external gear Pump Screw,lobe,Vane ,Plunger pump, Piston pump Power Control Units: 1) Flow control valves Regulating type, Control type 2) Check valves NRV,Pilot operated check valves 3) Pressure control valves Pressure Relief valves , Unloading valves, Sequence valves, Pressure-reducing valves , Counterbalance valves, Safety Valve 4)Direction control valves Poppet, Spool , Rotary valves, One,two,three way, DRIVE units: 1) Actuators Linear, Rotary, 1,2CYLINDERS, Telescopic cylinder, Hydraulic motors Auxiallry Power source units: 2
  3. 3. Hydraulic Systems 3
  4. 4. Basic Components in Hydraulic Systems 4
  5. 5. 5
  6. 6. 6
  7. 7. 1.RESERVOIR 7
  8. 8. 8
  9. 9. 9
  10. 10. 10
  11. 11. How Reservoirs Work 11
  12. 12. 12
  13. 13. 2. Filters 13
  14. 14. 14
  15. 15. 15
  16. 16. 16
  17. 17. 17
  18. 18. 18
  19. 19. Hydraulic oil contamination 19
  20. 20. Particles In Hydraulic Oil 20
  21. 21. Contaminant Types And Causes 21
  22. 22. Abrasion Classes 22
  23. 23. 23
  24. 24. 24
  25. 25. 25
  26. 26. 26
  27. 27. 27
  28. 28. 28
  29. 29. A hydraulic hose is a high-pressure, synthetic rubber, thermoplastic or Teflon reinforced hose that carries fluid to transmit force within hydraulic machinery 3.Hydraulic hose 29
  30. 30. 30
  31. 31. 31
  32. 32. 32
  33. 33. 33
  34. 34. 34
  35. 35. 35
  36. 36. 4. Hydraulic steel PIPES It also carries fluid to transmit force within hydraulic machinery 36
  37. 37. 37
  38. 38. 38
  39. 39. • Positive displacement pump (Gear Pump): a specific amount of fluid passes through the pump for each rotation • Centrifugal pump (Vane Pump): no specific amount of fluid flow per rotation; flow depends on speed of blades 39
  40. 40. Positive displacement vs Centrifugal pump Curve 40
  41. 41. PISTON PUMPS PLUNGER PUMPS DIAPHRAGM PUMPS RECIPROCATING PUMPS GEAR PUMPS LOBE PUMPS SCREW PUMPS CAM PUMPS VANE PUMPS ROTARY PUMPS POSITIVE DISPLACEMENT PUMPS CENTRIFUGAL PUMPS PUMPS 41
  42. 42. 42
  43. 43. • Displacement relates to how the output of the pump reacts to system loads – Non-positive-displacement pumps produce flow variations due to internal slippage. – Positive-displacement pumps produce a constant output per cycle 43
  44. 44. • A non-positive-displacement pump has large internal clearances – Allows fluid slippage in the pump – Results in varying flow output as system load varies 44
  45. 45. Key Feature of a V-Displacement Pump • Fixed Displacement Pump –A fixed volume of fluids will be provided in each revolution Variable Displacement Pump _The volume of supplying fluids may be change based on demands 45
  46. 46. 46
  47. 47. 47
  48. 48. 48
  49. 49. Vane Pumps 49
  50. 50. 50
  51. 51. 51
  52. 52. 52
  53. 53. 53
  54. 54. 54
  55. 55. 55
  56. 56. 56
  57. 57. Internal Gear Pump 57
  58. 58. Internal Gear Pump 58
  59. 59. Internal Gear Pump 59
  60. 60. • Operation of a lobe pump 60
  61. 61. • A typical screw pump 61
  62. 62. Operation Principle of Piston Pumps 62
  63. 63. 63
  64. 64. 64
  65. 65. A rotor-gear pump is a variation of the internal-gear pump. 65
  66. 66. 66
  67. 67. Rotor-gear Pumps 67
  68. 68. 68
  69. 69. 69
  70. 70. Hydraulic oil cooler 70
  71. 71. If the pump is the heart of a hydraulic system then the valve is the brain. Valves are used to perform a large variety of governing and controlling functions. Valves Function: • pressure control valves • flow control valves • check valves (non-return valves) • directional control valves 71
  72. 72. 72
  73. 73. Form: a) Spherical b) c) d) e) Conical f) Plate g) Spool valve Poppet valve Aspects of classification 73
  74. 74. Flow valvesBasics: The velocity of hydraulic cylinders can be influenced by the flow rate. This can be done by an adjustable pump or by a flow rate control valve. The flow rate is changed by changing an orifice surface area or by changing the pressure difference on a resistance or dividing the flow rate. Advantages of flow valves are:  simplicity  safe operation  good dynamic behaviour  precision Disadvantage:  the relatively high energy losses Types:  Restrictor valves (throttle valves)  Flow control valves  Flow dividing valves 74
  75. 75. 75
  76. 76. Flow Control Valves 76
  77. 77. 77
  78. 78. 78
  79. 79. Control Valves Regulating Valves Restrictor Orifice One Way Two Way 79
  80. 80. 80
  81. 81. 81
  82. 82. 82
  83. 83. 83
  84. 84. (a) In flow control (b) out flow control 84
  85. 85. 85
  86. 86. 86
  87. 87. 87
  88. 88. 88
  89. 89. Pilot pressure to open check valve 89
  90. 90. SHUTTLE VALVE 90
  91. 91. 1. Relief valves 2. Unloading valves 3. Sequence valves 4. Pressure-reducing valves 5. Counterbalance valves 6. Safety Valve 91
  92. 92. 92
  93. 93. 93
  94. 94. 94
  95. 95. Pressure relief valve 95
  96. 96. 1- Direct Acting Relief Valve (PRV) 96
  97. 97. 97
  98. 98. Fs > Fp Fs < Fp 98
  99. 99. Pressure relief valve 99
  100. 100. 100
  101. 101. 101
  102. 102. 102
  103. 103. Normal flow, no over load Pressure relief valve 103
  104. 104. 2- Pilot-Operated Relief Valve 104
  105. 105. 105
  106. 106. 2- Pilot-Operated Relief Valve 106
  107. 107. 2- Pilot-Operated Relief Valve 107
  108. 108. Unloading valves 108
  109. 109. Unloading valves 109
  110. 110. Sequence valves 110
  111. 111. Sequence valves 111
  112. 112. 112
  113. 113. Pressure reducing valves 113
  114. 114. Pressure-reducing valves 114
  115. 115. Counterbalance valves 115
  116. 116. Counterbalance valves 116
  117. 117. 117
  118. 118. 118
  119. 119. 119
  120. 120. 120
  121. 121. Directional Control Devices • Typical spool valve 121
  122. 122. 122
  123. 123. 123
  124. 124. 124
  125. 125. 125
  126. 126. 126
  127. 127. 127
  128. 128. 128
  129. 129. 129
  130. 130. 130
  131. 131. 131
  132. 132. 132
  133. 133. 133
  134. 134. 134
  135. 135. 135
  136. 136. 136
  137. 137. Solenoid Operated Spool Valves 137
  138. 138. 138
  139. 139. 139
  140. 140. 140
  141. 141. 141
  142. 142. 142
  143. 143. ACTUATORS  Hydraulic actuators convert the fluid power from the pump into mechanical work.  A hydraulic cylinder is a linear actuator.  A hydraulic motor is a rotary actuator. 143
  144. 144. 144
  145. 145. 145
  146. 146. 146
  147. 147. 147
  148. 148. 148
  149. 149. 149
  150. 150. 150
  151. 151. 151
  152. 152. Telescopic Cylinder 152
  153. 153. HYDRAULIC MOTORS  The function of hydraulic motors is the opposite of hydraulic pumps:  Pump  It draws in oil and displaces it, converting mechanical force into fluid force.  Motor  Oil under pressure is forced in and spilled out, converting fluid force into mechanical force. 153
  154. 154. 154
  155. 155. GEAR MOTORS 155
  156. 156. 156
  157. 157. 157
  158. 158. 158
  159. 159. 159
  160. 160. 160
  161. 161. 161
  162. 162. 162
  163. 163. 163
  164. 164. 164
  165. 165. 165

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