Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Applied Fluid Mechanics
A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.
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Industry Print Exercise 23-2 Refer to print PR 23-2. The sequence of operations for this print is given below. Answer the questions following the sequence of operations. Sequence of Operations descends at a controlled rate, slowly compacting the explosive charge to avoid detonation due to a sudden Description: This is a system to control a 90-ton hydraulic, explosive-compaction press. The press ram shock. 1. The cycle is started by energizing solenoid A, which shifts control valve 3 and supplies pressure to the head end of the hydraulic cylinder (7). This operates the ram. 2. The cylinder (7) extends at a slow rate controlled by the fluid in the rod end of the cylinder, which is vented through the flow control valve (5). the 1. When de-energizes solenoid A and energizes solenoid B. This shifts control valve 3 to retract the cylinder (7). de rol valve 5 has an integral check valve that permits the free flow of fluid in the opposite direction, causing the cylinder (7) to rapidly retra retract. 4. The retraction of the cylinder (7) actuates the limit switch (8), which de-energizes solenoid B. Control valve 3 returns to the neutral position. This completes the cycle. This circuit has safety features. On electrical power outage, both solenoid A and solenoid B are de-energized. This allows valve 3 to return to the center position, thus stopping ram travel. Also, valve 4 provides low-pressure relief on the ram upstroke, and valve 2 provides high-pressure relief on the ram downstroke. Questions 1. What is the name of the circuit? 2. How many reservoir symbols are shown, and how many reservoirs are there? 3. What starts the sequence of operations? 4. When valve 3 shifts on due to the energizing of solenoid A, to which end of the cylinder (7) is pressure supplied? 5. What causes the ram to extend at a slow, controlled rate? 6. What causes the ram to retract? 7. Why does the cylinder (7) retract rapidly? 514 Section 5 Specialized Parts and Prints 8. What completes the cycle? 9. What happens in the event of electrical power outage? 10. Give the function of valves 2 and 4. 513
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Transcribed Image Text:Industry Print Exercise 23-2 Refer to print PR 23-2. The sequence of operations for this print is given below. Answer the questions following the sequence of operations. Sequence of Operations descends at a controlled rate, slowly compacting the explosive charge to avoid detonation due to a sudden Description: This is a system to control a 90-ton hydraulic, explosive-compaction press. The press ram shock. 1. The cycle is started by energizing solenoid A, which shifts control valve 3 and supplies pressure to the head end of the hydraulic cylinder (7). This operates the ram. 2. The cylinder (7) extends at a slow rate controlled by the fluid in the rod end of the cylinder, which is vented through the flow control valve (5). the 1. When de-energizes solenoid A and energizes solenoid B. This shifts control valve 3 to retract the cylinder (7). de rol valve 5 has an integral check valve that permits the free flow of fluid in the opposite direction, causing the cylinder (7) to rapidly retra retract. 4. The retraction of the cylinder (7) actuates the limit switch (8), which de-energizes solenoid B. Control valve 3 returns to the neutral position. This completes the cycle. This circuit has safety features. On electrical power outage, both solenoid A and solenoid B are de-energized. This allows valve 3 to return to the center position, thus stopping ram travel. Also, valve 4 provides low-pressure relief on the ram upstroke, and valve 2 provides high-pressure relief on the ram downstroke. Questions 1. What is the name of the circuit? 2. How many reservoir symbols are shown, and how many reservoirs are there? 3. What starts the sequence of operations? 4. When valve 3 shifts on due to the energizing of solenoid A, to which end of the cylinder (7) is pressure supplied? 5. What causes the ram to extend at a slow, controlled rate? 6. What causes the ram to retract? 7. Why does the cylinder (7) retract rapidly? 514 Section 5 Specialized Parts and Prints 8. What completes the cycle? 9. What happens in the event of electrical power outage? 10. Give the function of valves 2 and 4. 513
B XK PR 23-2. 90 Ton Hydraulic Press Schematic 5 (M) (2) HIGH PRESSURE RELIEF VALVE (3) 4-WAY, 3-POSITION, BLOCKED-CENTER, DOUBLE SOLENOID ACTUATED, MAINTAINED CONTACT, SPRING CENTERED VALVE (4) LOW PRESSURE RELIEF VALVE FLOW CONTROL VALVE, ADJUSTABLE AND PRESSURE COMPENSATED WITH BYPASS 6) PRESSURE SWITCH (7) DOUBLE ACTING HYDRAULIC CYLINDER (8) LIMIT SWITCH REDD NEM CHECKED TOOL NAME COMPONENT LIST UNIDIRECTIONAL, FIXED DISPLACEMENT, HYDRAULIC PUMP AND ELECTRIC MOTOR APPROVED SHEET MATERIAL STOCK SIZE TALLEY INDUSTRIES MESA, ARIZONA MANUFACTURING ENGRG DEPT 90 TON HYDRAULIC PRESS SCHEMATIC 90 TON COMPACTION PRESS 8/28 8/28 WALKER SCHNEIDER SCALE NONE NONE A 12116 200 300 002 000 0002 ANGLES at COMMON CONTORNE CONCENTRIC whos REMOVE BURS NO SAP EDES 230 MAK 8568321 Print supplied by Talley Industries
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Transcribed Image Text:B XK PR 23-2. 90 Ton Hydraulic Press Schematic 5 (M) (2) HIGH PRESSURE RELIEF VALVE (3) 4-WAY, 3-POSITION, BLOCKED-CENTER, DOUBLE SOLENOID ACTUATED, MAINTAINED CONTACT, SPRING CENTERED VALVE (4) LOW PRESSURE RELIEF VALVE FLOW CONTROL VALVE, ADJUSTABLE AND PRESSURE COMPENSATED WITH BYPASS 6) PRESSURE SWITCH (7) DOUBLE ACTING HYDRAULIC CYLINDER (8) LIMIT SWITCH REDD NEM CHECKED TOOL NAME COMPONENT LIST UNIDIRECTIONAL, FIXED DISPLACEMENT, HYDRAULIC PUMP AND ELECTRIC MOTOR APPROVED SHEET MATERIAL STOCK SIZE TALLEY INDUSTRIES MESA, ARIZONA MANUFACTURING ENGRG DEPT 90 TON HYDRAULIC PRESS SCHEMATIC 90 TON COMPACTION PRESS 8/28 8/28 WALKER SCHNEIDER SCALE NONE NONE A 12116 200 300 002 000 0002 ANGLES at COMMON CONTORNE CONCENTRIC whos REMOVE BURS NO SAP EDES 230 MAK 8568321 Print supplied by Talley Industries
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