Oil burner pump |
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| 申请号 | US33161173 | 申请日 | 1973-02-12 | 公开(公告)号 | US3850548A | 公开(公告)日 | 1974-11-26 |
| 申请人 | DELANCEY W; | 发明人 | DELANCEY W; | ||||
| 摘要 | In a variable capacity pump with an inlet port and a discharge outlet adapted for connection to a nozzle, a cylinder within the pump body having a casing and a pump stator slidably mounted in the cylinder and receiving a vaned rotor for receiving fluid from said inlet and discharging to said outlet; the improvement which includes a delivery chamber receiving said pumped fluid with a cut off valve opening. Said opening includes a valve seat with a soft valve in one end of the movable stator normally engaging said seat. A spring retainer is normally spaced outwardly of one end of the stator and a weak air release spring is interposed between said retainer and said stator. A discharge pressure spring is interposed between the pump body and said retainer, normally holding the retainer during initial movement of the stator towards and into engagement with the retainer so that initial low pressure air delivered to said chamber lifts the soft valve from said seat for delivery to said nozzle. Solid liquid subsequently pumped to said chamber of progressively increasing pressure causes the stator to move further radially outward against the action of said discharge pressure spring further opening said valve to reach an equilibrium of volume of pumped liquid delivered to said nozzle. The improved pump includes opposed pairs of intake and outlet grooves upon opposite sides of the stator registerable with corresponding pairs of intake and discharge ports extending through the inner and outer walls of the pump cylinder together with opposed bosses upon opposite sides of said stator normally closing one of each pair of intake and discharge ports whereby, the stator is reversible face to face, depending upon the direction of rotation of the rotor. An improved drive shaft seal is incorporated into the pump body which includes a stationary seal element on the body and a rotative seal element engageable therewith and connected with said drive shaft. | ||||||
| 权利要求 | 1. In a variable capacity pump having a body with a liquid inlet port and a discharge outlet adapted for connection to a nozzle; a cylinder within the body formed by a hollow casing, and front and rear pump plates secured thereto; a pump stator slidably mounted in said cylinder engaging said pump plates and having an cylindrical opening therethrough; a rotor with radially movable vanes mounted in said opening with the vanes adapted to move over the boundary of said opening for a pumping action, receiving liquid through a port in said rear pump plate and discharging liquid through a port in said front plate; the improvement comprising a drive shaft mounted and journalled in said body extending through said pump plates and secured to said rotor; opposed extensions on said stator slidably movable respectively within a radial first slot extending through said casing; and a radial second slot extending into said casing; said second slot outwardly of one stator extension defining a discharge chamber adapted to receive pumped fluids; there being a cut off valve opening in said casing adapted for connection to said discharge outlet; said cut off valve opening including a seat in said chamber, and a soft valve on one stator extension normally in registry with said seat; a spring retainer within said pump body normally spaced radially outward of the other stator extension and supported upon said pump plates; an air release spring interposed between said retainer and said stator extension, yieldably resisting radial outward movement thereof; and a discharge pressure spring coaxial of and interposed between said retainer and said body normally holding said retainer during initial movement of said stator towards and into engagement with said retainer, so that initial low pressure air delivered to said chamber lifts the soft valve from said seat for delivery to said nozzle; solid liquid subsequently pumped to said chamber of progressively increasing pressure causing the stator to move further radially outward against the action of said discharge pressure spring, further opening said valve to reach an equilibrium of volume of pumped liquid delivered to said nozzle. 2. In the pump of claim 1, said air release spring being relatively weak responding to pressures in the range of 5 to 35 pounds per square inch, said discharge pressure spring being relatively strong responding to liquid pressure in the range of 50 to 200 pounds per square inch. 3. In the pump of claim 1, said pump body having a chamber loosely enclosing said cylinder defining an annular space around said cylinder communicating with said inlet port; a cover on said body closing said chamber; there being an annular groove on said rear pump plate, in registry with the rear pump plate port. 4. In the pump of claim 3, said stator being chamfered upon its opposite faces defining inlet and outlet passages; said inlet passages communicating with said rear pump plate port for delivery of fluid to the intake side of said rotor. 5. In the pump of claim 4, said outlet passages receiving pumped fluid from the discharge side of said rotor for delivery to said front plate port and to Said discharge chamber. 6. In the pump of claim 5, there being a second axial port in the rear and front pump plates spaced from its respective first port; said second port in said rear pump plate communicating with its annular groove and adapted to communicate with said stator inlet passages; said second port in said front pump plate adapted for communicating with said stator outlet passages and said discharge chamber; said stator adapted to be reversed face to face for respective communication of the inlet passages with the second port in said rear pump plate and communication of the outlet passages with the second port in said front pump plate; there being diammetrically opposed axial bosses projecting from the respective opposite sides of said stator; said bosses selectively closing one port in said rear pump plate and one port in said front pump plate, whereby upon rotation of said rotor in the reverse direction, all that is required is to reverse the position of said stator face to face. 7. In the pump of claim 5, conduit means for delivering pumped fluids from said front plate port to said discharge chamber, said conduit means including a passage in said stator outletting to said discharge chamber, and a slot upon the inner face of said body adjacent said pump front plate in registry with the front pump plate port and with said stator passage. 8. In the pump of claim 7, there being an annular slot in the outer face of said front pump plate in registry with its port and communicating with said body slot. 9. In the pump of claim 7, there being a fluid return axial port in said body inner face in registry with said inner face slot; and a restricted fluid return outlet on said pump body connected to said body port adapted for connection to a fluid storage tank for the bypassing of pressure fluid. 10. In the pump of claim 1, a radial boss on said body having a bore receiving said spring retainer and said discharge pressure spring; an adjusting screw nut in said bore retainingly engaging the outer end of said discharge pressure spring; and a discharge pressure adjustment bolt rotatively anchored in said boss and threaded into said nut. 11. In the pump of claim 1, a hardened steel shroud mounted over the rear pump plate; the inner end of said drive shaft having a conical end in axial end thrust engagement with said shroud. 12. In the pump of claim 11, an axial boss on said body receiving said drive shaft; an apertured seal cover on the outer end of said boss receiving said shaft; an annular apertured seal receiving said shaft seated on the outer end of said boss and anchored by said seal cover; a rotative seal face nose piece within said boss in engagement on one side with said seal; a seal drive spaced from said nose piece, secured upon said shaft and rotatable therewith; a compression spring between said seal drive and seal face nose piece; and drive means between said seal drive and nose piece, said nose piece being longitudinally movable on said shaft; the thrust of said spring upon said nose piece tending to slide the drive shaft inwardly biasing the shaft conical end against said shroud minimizing friction due to the thrust from said spring. 13. In the pump of claim 1, an axial boss on said body receiving said drive shaft; an apertured seal cover on the outer end of said boss receiving said shaft; an annular apertured seal receiving said shaft seated on the outer end of said boss and anchored by said seal cover; a rotative seal face nose piece within said boss in engagement on one side with said seal; a seal drive secured upon said shaft and rotatable therewith; a compression spring between said seal drive and said seal face nose piece; and a drive means between said seal drive and nose piece, said nose piece being longitudinally movable on said shaft. 14. In the pump of claim 13, and an annular flange on said one side of said nose piece in continuous engagement with said seal throughout 360*. 15. In the pump of claim 13, said seal drive means between said seal drive and nose piece being a series of splines. |
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