ENGINEERING Qualification BTEC L3 in Advanced Manufacturing Engineering (Development Technical Knowledge) Unit number and title: Unit 11 Electro, Pneumatic & Hydraulic Systems & Devices Assignment No. and title: (3 of

4) Fluid Power Principles and Circuits Student name Aadam Norris Assessors: Issue date: Lead IV Authorisation for Re-submission Signed: Learning outcomes LO3 Be able to apply fluid power principles in the design of circuits Criteria reference P5 P6 Hand In Deadline: Re-submission Deadline P7 OAKLANDS COLLEGE Date Submitted: Re-submission date Assessment criteria Carry out calculations that relate to the fluid power principles used in the design of circuits Produce a circuit diagram to meet a given pneumatic system specification Produce a circuit diagram to meet a given hydraulic system specification THIS SHEET MUST BE RETURNED WITH THE COMPLETED WORK Page 1 of 6 1st Final Submission Submission Yes/No Yes/No Yes/No Yes/No Yes/No Yes/No Scenario Assignment 3 Brief OAKLANDS COLLEGE You are working in the engineering department of a manufacturing company that has an automated production line. Your role includes the design of the automated line which includes Electro, Pneumatic and Hydraulic systems and devices. You have been provided with circuit requirements but no other information regarding the operation of the systems. You need to create designs for them and prove their feasibility by using fluid power principles. Activity 1 A lid is required to allow parts to be added and removed from a furnace for heat treatment. Your circuit needs to be electro-hydraulically operated by two buttons (one up / one down). One press of a button will fully open or close the lid. The gauge pressure in the system is (P) bar. The area of the piston is (A) cm². Calculate the maximum mass of the lid that may be moved. You must provide the following information: - Fluid power principle calculations (including workings out) involving fluid pressure Figure 1: Hydraulically operated furnace lid THIS SHEET MUST BE RETURNED WITH THE COMPLETED WORK Page 2 of 6 No 1 2 3 4 5 C D E F G 6 H | 8 J 9 K 10 L 11 M 12 N 13 O Surname please Choose N Row 67 P Q RS S T U V W X Y Z A B Pressure Area (P) (A) bar 1 1 1 1 1 1 1 1 1 1 1 1 1 cm² 15 14 17 18 22 19 16 21 20 15 14 17 18 OAKLANDS COLLEGE THIS SHEET MUST BE RETURNED WITH THE COMPLETED WORK Page 3 of 6 Activity 2 Produce a circuit for the following scenario. You must provide the following information: - Fluid power principle calculations (including workings) (i) OAKLANDS COLLEGE Stacking magazine station A stacking magazine station contains a double acting cylinder with 2 limit switches and 100 mm stroke that moves a lid from the stacked area onto a base. A single acting cylinder with a stroke of 50 mm then presses the lid onto the base. Produce a pneumatic circuit schematic of this system in FluidSim-P. (ii) A compressor is connected to the stacking magazine station with a rated free air delivery of (Q) m³ / min (measured at (T1) °C and (P1) bar) and absolute pressure of P2. Answer the following questions: gas laws and fluid flow (iii) What is the compression ratio needed to produce the specified pressure? What is the largest force that may be applied by the single acting cylinder if its piston diameter is (D) mm? To extend the cylinder, the compressor delivers air at an absolute pressure of (P2) bar and temperature of (T2) °C. What is the output flow rate from the compressor? THIS SHEET MUST BE RETURNED WITH THE COMPLETED WORK Page 4 of 6 No 1 2 34 3 4 LO 5 6 7 8 9 10 11 12 13 Surname Please choose the row containing N C D E F G H | J K L M N O P Q R S T U V W X Y Z A B Pressure (P1) bar 1 1 1 1 1 1 1 1 1 1 1 1 1 Pressure Temp Temp (P2) (T1) (T2) bar 7 2 8 3 6 4 582 7 3 6 4 Activities 1 and 2 provide evidence for the criteria P5, P6, P7 °C 15 26 14 25 17 28 18 29 22 33 19 30 16 627 21 32 20 31 15 26 14 25 17 28 18 29 OAKLANDS COLLEGE Flow Rate (Q1) m³/min 0.03 0.02 0.029 0.021 0.028 0.022 0.027 0.023 0.026 0.024 0.025 0.03 0.02 THIS SHEET MUST BE RETURNED WITH THE COMPLETED WORK Page 5 of 6 Diameter (D) mm 24 22 20 25 26 21 27 23 24 22 20 25 26

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A pump capable of maintaining 20 [MPa] of pressure is supplying oil of viscosity 80 [cP] to a circular hydrostatic thrust bearing of an outside diameter of 0.1 [m] at a rate of 0.4x10* [m/s], generating a steady film thickness of 30 [um]. The bearing supports a weight of 60 [kN] and rotates at 1,000 [rpm]. Calculate a suitable recess radius and pumping power. (Ans. R, = 0.0285 [m], H= 50.89 [W])

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