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TSM 363 Fluid Power Systems

TSM 363 Fluid Power Systems. Hydraulic Hoses & Pipeline. Conductors for Fluid Delivery. It’s common for using hoses and tubes on ORE as fluid conductors. Hoses are flexible and tubes are rigid conductors. There are three criteria in selecting the conductors.

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TSM 363 Fluid Power Systems

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  1. TSM 363 Fluid Power Systems Hydraulic Hoses & Pipeline

  2. Conductors for Fluid Delivery It’s common for using hoses and tubes on ORE as fluid conductors Hoses are flexible and tubes are rigid conductors. There are three criteria in selecting the conductors. Rule of thumb: use flexible hoses whenever you can.

  3. Typical Structure of Hydraulic Hoses Inner tube: Oil resistant thermoplasticflexible tube Direct contact with the hot hydraulic oils Reinforcement layer:making hoses stronger wire- or fabric-reinforced outer layer: endure the useful life weather, oil, or abrasion-resistant.

  4. Commonly Used Hydraulic Hose Types

  5. SAE J517 Standard Hoses Specifies (Incomplete List)

  6. Rules of Hydraulic Hose Installations

  7. Commonly Used Hoses Fittings It is a must to use some types of hose connectors(often calledfittings), either reusable or no-reusable, for connecting hoses.

  8. Quick-Disconnect Coupling

  9. Determination of working pressure: SF: safety factor. It is recommended to take SF=8 for pressures below 1000 psi SF=6 for pressures between 1000~2500 psi SF=4 for pressures above 2500 psi Pressure Rating of Conductors Two Pressure Ratings: Burst Pressure (BP) – the fluid pressure will cause the pipe to burst. Working Pressure (WP) – the maximum safe operating fluid pressure

  10. Fluid velocity is determined by the following equation: The recommended fluids velocity for different conductors: Pump inlet line: 4 ft/sec Pressured lines: 0-500 psi 15 ft/sec 500-3000 psi 20 ft/sec over 3000 psi 25 ft/sec Return line: 15 ft/sec Sizing the Conductor The size of the hose/tube in a fluid power system is determined based on the velocity of the fluids moving the conductor.

  11. 100 50 40 5 30 4 3 20 2 1 1/2 10 2 1 3 3/4 5 4 4 5 1/2 3 2 10 1/4 1 20 1/8 30 0.5 40 50 Flow (GPM) I.D. (inch) Velocity (ft/sec) Exercise: Select Conductor Uses Nomograph

  12. STAMPED procedure of Hose Selection The Size of the hose is determined based on the velocity of the fluids moving in it. The operationTemperature rangeof a hose is determined by the materials in the hose is made of. A good Applicationplanis to route the high-pressure lines parallel to machine contours whenever possible. It is mandatory to check the compatibility of hose fabricatingMaterialsbeing used with the fluids used in the system. Hose rated working Pressure needs to be chosen correctly forsafe operation. Use of proper fittings on both Endsof the hose segments. The Deliverability of the selected components in a timely manner.

  13. Hydraulic Manifolds

  14. Manifold for Integrated Valves

  15. Lecture Summary • Discussed the basic concepts of hydraulic hoses: • Fabrication • Application • Introduced basic concepts of hydraulic manifolds: • Single valve • Integrated valves

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