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Power p1


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Power p1

  1. 2. Hydrostatic Drive Trainer
  2. 3. What is Hydrostatics' <ul><li>The hydrostatic drive is a fluid drive which uses fluid under pressure to transmit engine power to the drive wheels of the machine. </li></ul><ul><li>Hydrostatics is the use of fluids at high pressure but relatively low speeds. </li></ul>
  3. 4. In a closed loop circuit between the pump and the motor as shown, the fluid moves through the lines from the pump to the motor to transmit the power to the drive output, then returns back to the pump.
  4. 5. There are several different types of machinery used in industry today that are run by hydrostatics. Excavators
  5. 6. Front-end Loaders
  6. 7. Skid steer Loaders
  7. 8. Compact rollers and Paving Equipment
  8. 9. Now For a Closer Look at the different types of hydrostatic drives. <ul><li>Circuit 1. Fixed displacement pump driving a fixed displacement motor. </li></ul><ul><li>Circuit 2. Variable displacement pump driving a fixed displacement motor. </li></ul><ul><li>Circuit 3. Fixed displacement pump driving a variable displacement motor. </li></ul><ul><li>Circuit 4. Variable displacement pump driving a variable displacement motor. </li></ul>
  9. 10. Circuit No. 1 <ul><li>This is like a gear drive circuit, it transmits power without altering the speed or horsepower between the engine and the load. A constant input speed and torque gives a constant output horsepower. If either the speed or the torque are increased while holding the other constant, the output horsepower will increase. </li></ul>
  10. 11. Fixed pump and motor
  11. 12. Circuit No.2 <ul><li>In this circuit the output speed is variable and the torque output is constant for any pressure. This circuit gives variable speed and constant torque. </li></ul>
  12. 13. Variable pump and fixed motor
  13. 14. Circuit No. 3 <ul><li>This circuit is varied by changing the motor displacement. For constant power input if the motor displacement decreases, output speed increases but output torque drops. </li></ul>
  14. 15. Fixed pump and variable motor
  15. 16. Circuit No. 4 <ul><li>This circuit is the most flexible and expensive of all the circuits but also the most difficult to control. It is capable of operating like any of the above combinations. </li></ul>
  16. 17. Variable pump and variable motor
  17. 18. Reversing in variable pump-motor circuits <ul><li>The direction of the output shaft rotation can be reversed in variable circuits by shifting either the pump or motor swashplate over center, thus we have neutral, forward, and reverse. </li></ul>
  18. 19. Power Flow Neutral
  19. 20. Power Flow Forward
  20. 21. Power Flow Reverse
  21. 22. Old mechanical linkage.
  22. 23. New electronic over Hydraulics.
  23. 24. Our totally self contained hydrostatic Drive Trainer.
  24. 25. Driven by a Caterpillar 3114 engine
  25. 26. Controlled with a variable displacement pump.
  26. 27. Variable displacement motor.
  27. 28. Hydraulic controls operated by, p r e s e n t s
  28. 29. Principle of operation
  29. 30. principle A library of functions at your disposal An electronic system to manage your transmission
  30. 31. Smart drive easy ECM
  31. 32. Complete wiring diagram
  32. 33. Advantages +
  33. 34. 1 No programming necessary Guided steps to help you choose your functions User-friendly PC Tools Simple Economical Reliable advantages + Quick
  34. 35. 1 advantages + Simple Economical Quick Reliable Hardware SD Easy Controller On-board software PC software PHASES ™ Easy
  35. 36. 2- downloading the configuration Validate your choices installation + Transfer your configuration to the controller Download your configuration to the PC
  36. 37. functionalities
  37. 38. Joystick controls
  38. 39. functionalities Acceleration and deceleration control + Define your vehicle behavior (smooth / responsive) Determine your parameters min. & max. speed, acceleration & deceleration ramps
  39. 40. Vehicle speed 1s 4s 3s 2s 5s Joystick motor displacement Acceleration phase Infinitely variable speed Seamless speed change Simultaneous motor and pump displacement change Enhanced safety in deceleration mode Pump displacement functionalities +
  40. 41. Operating mode selection functionalities + Define your vehicle behavior (smooth / responsive) Determine your parameters min. & max. speed, constant speed or automotive style, acceleration & deceleration ramps Work mode Road mode
  41. 42. Work mode : To supply sufficient power to the implements Transmission power limitation + functionalities Road mode : To protect the hydrostatic transmission from exceeding horsepower limits
  42. 43. Shorten braking distance by combining mechanical and hydrostatic braking Combined braking + functionalities
  43. 44. Whatever the engine RPM Constant speed Seamless speed shift Speed regulation in work mode + functionalities
  44. 45. Reduction of the pump displacement Anti-stall + functionalities If the engine HP is insufficient for the hydraulic motors Recuperation of engine HP
  45. 46. I.S.U. Hydrostatic Trainer