piston less pump

05/02/2023 Piston less Pump 1

PISTON LESS PUMP

Submitted by-:Satyajeet das


INTRODUCTION

• Pump is a device which converts mechanical energy into hydraulic energy.• Principle: A partial vacuum created when internal parts of pump

receives mechanical energy .• Oil is forced into pump due to atmospheric pressure on oil and

suction created by pumping element.• Oil is squeezed b/w pump elements which increases pressure of fluid

and then is forced out of pump and the cycle continues.


Cont..

• A Piston less pump is a type of pump designed to move fluids without any moving parts other than three chamber valves.

• This pump provides increased design flexibility & increase damage and fault tolerance.

• Absence of piston leads to less friction losses& hence improves efficiency of engine considerably.


WHY PISTONLESS PUMP?????

• Turbo pumps have a reputation for being extremely hard to design to get optimum performance

• Low efficiency – ONLY 55%

•Weight of pump is high hence Undesirable to use.

TYPICAL TURBO PUMP SETUP


NECESSITY• The turbo pumps used in rocket are very heavy, containing many rotating

parts by which there are more frictional losses which more consumption of fuel there by decreasing the efficiency of the engine .• since the rocket has to remain stable in the space, is difficult and require

complex methods for it. If this pump gets any fault then its reappearance requires long time. So, there must be such a device which overcomes all the drawbacks of the turbo pump.

• The Piston less pump is the solution for the problems faced by using turbo pumps.


DIFFERENCE BETWEEN TURBO & PISTONLESS PUMP

TURBO PUMP

Piston Less

PUMP


DUAL PISTONLESS PUMP

NASA has designed, built and tested a simple, light weight pump (dual piston less pump) for use in liquid propelled rocket where a reliable pump with minimal moving parts is needed.

This pump has the potential to reduce the cost and increase the reliability of rocket fuel pumps by a factor of 20 to 100.


WORKING MODEL OF ROCKET FUEL PUMP• The pump shown is equipped with

electronic level sensors and air cylinder actuated ball valves. The pump works as predicted and it will be easy to reconfigure it to pump LOX and jet fuel.

• This type of pump will make rocket propulsion systems much more reliable and less expensive than that of the turbo jet pump.


WORKING OF PISTONLESS PUMP (Rocket engine)

It consists of main tank and Two pumping chambers . The pump starts with both chambers filled.

Each one being alternately refilled and pressurized .

One chamber is pressurized, and fluid is delivered to the rocket engine from thatchamber(Step 1).


Once the level gets low in one chamber, the other chamber is pressurized;


Flow is thereby established from both sides during a short period until full flow is established from the other chamber. Then the nearly empty chamber is vented and refilled.


Finally the cycle repeats. This results in steady flow and pressure. The pump is powered by pressurized gas which acts directly on the fluid


FLOW AND PRESSURE DATA FOR ROCKET FUEL PUMP


TALK FLOW1. INTRODUCTION.2. NECESSITY.3. DIFFERENCE BETWEEN TURBO AND PISTONLESS PUMP.4. DUAL PISTONLESS PUMP.5. WORKING PRINCIPLE.6. FLOW AND PRESSURE GRAPH.7. APPLICATIONS.8. ADVANTAGES.9. DISADVANTAGES.10. FUTURE APPLICATIONS.11. CONCLUSION.12. REFERENCE.


APPLICATIONS

• DEEP SPACE PROPULSION - NASA has a need for high Power propulsion to land and spacecraft on the moons of Jupiter and beyond. This pump would allow these missions to go forward due to lower weight of the fuel tanks.

• X PRIZE VEHICLE FUEL PUMP APPLICATION- For X-prize competitors, a the fuel pump will reduce the cost.


ADVANTAGES

• All the hardware in the pump consists of pressure vessel so the weight is low.

• The pump can be scaled up or down with similar performance and minimal redesign issues.

• Low risk development; pump technology has been demonstrated and prototypes have been built and tested.

• The manufacturing tolerances need not be tight.

• Less moving parts , hence lubrication required is quite low.

• Design is simple compared to turbo pumps.


DISADVANTAGES• They cannot pump to higher pressure than drive gas (area ratio is 1:1)• They cannot use either a staged combustion or expander cycle.• A gas generator cycle is also difficult to integrate with the piston less

pump.• The generated gas must be chemically compatible with both the propellants.• This gas generator lowers the Ignition start period of the engine.


FUTURE APPLICATION

• Static test and fly pump in student rocket with Flometric’s rocket technology.

• Along with latest low cost engine designs, pump will make lunch systems more safe, reliable and affordable


CONCLUSION

• The most significance of property of Piston less pump that makes them different from that of turbo pump ,is the absence of piston.• This is the most unique technique. In this ,no. of rotating parts is very

less as compared to that of turbo pump. Also, it’s installation is very easy. and moreover, it is light weight than turbo pump. So, it has less losses and improves, rather increases efficiency of engine. Also, it is much economical than turbo pump.


REFERENCE

• Harrington, S. Piston less Dual Chamber Rocket Fuel Pump: Testing and Performance” AIAA 2003-4479., Joint Propulsion Conference, Huntsville, AL, 20-23 July 2003.• Harrington, S. Launch Vehicle and Spacecraft System Design Using the

Piston less Pump Steve Harrington AIAA 2004-6130 AIAA Space 2004.


THANK YOU


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