초록 ▼

A dynamic variable orifice includes a housing within which are located a rotor having at least one opening extending therethrough, and at least one seat ring, having an opening therethrough, biased thereagainst. In response to a pressure spike occurring at the inlet of the dynamic variable orifice,

A dynamic variable orifice includes a housing within which are located a rotor having at least one opening extending therethrough, and at least one seat ring, having an opening therethrough, biased thereagainst. In response to a pressure spike occurring at the inlet of the dynamic variable orifice, the rotor moves axially and rotationally in the housing, to selectively align the opening in the rotor with the opening in the seat ring.

대표청구항 ▼

1. A dynamic variable orifice comprising: a body comprising a fluid inlet, a fluid outlet, and a rotor bore; a rotor received within the rotor bore, the rotor comprising at least one flow bore extending therethrough, the rotor configured for reciprocating and rotational movement in the rotor bore; a

1. A dynamic variable orifice comprising: a body comprising a fluid inlet, a fluid outlet, and a rotor bore; a rotor received within the rotor bore, the rotor comprising at least one flow bore extending therethrough, the rotor configured for reciprocating and rotational movement in the rotor bore; andat least one seat ring, the seat ring comprising a sealing surface and a through bore extending therethrough, the sealing surface of the seat ring configured and arranged to bear against the rotor; wherebya pressure spike applied to the inlet causing axial and rotational movement of the rotor, and the at least one bore extending therethrough, to allow the at least one bore extending therethrough to selectively align with the through bore of the seat ring. 2. The dynamic variable orifice of claim 1, wherein a first spring biases the seat ring against the rotor. 3. The dynamic variable orifice of claim 1, wherein: the rotor bore includes at least one centerline extending therethrough;the rotor flow bore extends therethrough generally parallel to and offset radially from, the centerline; andthe seat ring includes at least one seat ring flow bore extending therethrough generally parallel to and offset radially from, the centerline. 4. The dynamic variable orifice of claim 3, wherein the seat ring comprises a generally right annular member having an outer wall and an inwardly projecting seat flange at a first end thereof, and an unobstructed opening at the other, second end thereof. 5. The dynamic variable orifice of claim 4, wherein the inlet extends through an inlet housing, and the first spring is disposed at least partially within the seat ring and between the seat flange and the inlet housing. 6. The dynamic variable orifice of claim 3, wherein the seat ring comprises a main bore extending therein and terminating within the seat ring spaced from the rotor; and the flow bore extends from, and is radially offset from, the main bore. 7. The dynamic variable orifice of claim 6, wherein: the seat ring further comprises an annular wall surrounding the main bore, the annular wall terminating at a spring ledge;the inlet extends through an inlet housing; andthe first spring extends around the annular wall and bears against the annular wall and the inlet housing. 8. The dynamic variable orifice of claim 1, wherein: the rotor comprises an outer circular cylindrical wall; anda slot extending inwardly of the outer circular cylindrical wall and radially and axially along the outer circular cylindrical wall; anda pin extends inwardly of the rotor bore and into the slot. 9. The dynamic variable orifice of claim 3, wherein a second spring biases the rotor in a direction away from the outlet. 10. The dynamic variable orifice of claim 4, further comprising a spring guide extending from the rotor in the direction of the outlet, wherein the spring surrounds the spring guide; the outlet extends through an outlet wall; andthe maximum distance from the end of the spring guide to the outlet wall defines the maximum rotation of the rotor. 11. The variable dynamic orifice of claim 10, wherein the guide portion further comprises a pair of slots extending inwardly of the inner cylindrical wall of the guide portion aligned in the direction of the centerline of the bore. 12. The dynamic variable orifice of claim 10, further comprising: at least recess extending inwardly of the outer cylindrical wall of the sleeve; anda pin extending through the body and inwardly of the recess in the outer cylindrical wall of the sleeve. 13. The dynamic variable orifice of claim 10, wherein the metered inlet piston includes a rotor facing surface with which the at least one flow passage communicates, and a teardrop shaped recess extending inwardly of the rotor facing surface in alignment with the location of the at least one flow passage. 14. The dynamic variable orifice of claim 13, wherein the first biasing element is a spring. 15. The dynamic variable orifice of claim 13, wherein the second biasing element is a spring. 16. The variable dynamic orifice of claim 13, wherein the second biasing element is a fluid biased piston. 17. A dynamic variable orifice, comprising: a body having a fluid inlet, a fluid outlet, and a bore extending therein between and in fluid communication with the inlet and the outlet, the bore having a center line thereof and a first end wall adjacent to, and surrounding, the inlet and a second end wall adjacent to, and surrounding the outlet;a sleeve located in the bore, the sleeve comprising an inner cylindrical wall having a threaded internal wall portion and a guide portion, and an outer cylindrical wall;a metered inlet piston having a body comprising a guide feature cooperatively positioned with respect to the guide portion, and at least one flow passage therein extending generally parallel to, and radially offset from, the centerline of the bore;a rotor having an external threaded wall threadingly received within the threads of the sleeve, the rotor further comprising a first face facing the inlet, a second face facing the outlet, and a rotor bore extending therein from the first face, the rotor bore extending generally parallel to, and radially offset from, the centerline of the bore and communicating with the second face;a spring guide extending from the second face of the rotor in the direction of the outlet;and a spring extending from the second end wall and configured and arranged to provide a bias force pushing the rotor in the direction of the inlet. 18. The dynamic variable orifice of claim 17, wherein the guide feature comprises a pair of tabs, one of each tabs extending inwardly of a slot in the sleeve. 19. The dynamic variable orifice of claim 18, wherein the metered inlet piston is reciprocally positioned in the guide portion. 20. The dynamic variable orifice of claim 17, wherein fluid pressure at the fluid inlet biases the metered inlet piston against the first face of the rotor. 21. A dynamic variable orifice comprising a body having a bore therein communicating at a first end of the bore with a fluid inlet extending inwardly of a first end wall and at a second, opposed, end thereof with a fluid outlet extending outwardly of a second end wall, the bore comprising a centerline; a rotor received in the bore and configured to reciprocate rotationally and axially in the direction of the inlet to the outlet;a first biasing element received within the bore and extending therefrom to bias the rotor in the direction of the fluid inlet; anda second biasing element disposed between the rotor and the first end wall and configured to bias against the rotor in the direction of the fluid outlet; whereinthe rotor further comprises at least one bore flow passage therein extending generally parallel to, and offset from the centerline; andthe second biasing element includes a biasing element flow passage therein extending generally parallel to, and offset from the centerline.