Self regulating fluid bearing high pressure rotary nozzle with balanced thrust force
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05B-003/04
출원번호
US-0829661
(2010-07-02)
등록번호
US-8544768
(2013-10-01)
발명자
/ 주소
Wright, Douglas E.
출원인 / 주소
Stoneage, Inc.
대리인 / 주소
Greenberg Traurig, LLP
인용정보
피인용 횟수 :
6인용 특허 :
15
초록▼
A fluid bearing nozzle assembly is disclosed that has a hollow cylindrical body, an inlet nut fastened to the cylindrical body, and a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body. The inlet nut has a stem portion extending into
A fluid bearing nozzle assembly is disclosed that has a hollow cylindrical body, an inlet nut fastened to the cylindrical body, and a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body. The inlet nut has a stem portion extending into a central bore through the shaft member forming an inlet bearing area rotatably carrying the shaft member thereon. The shaft member has a spray head fastened thereto for rotation of the head with the shaft member. An inner wall of the housing body and an outer portion of the shaft have complementary shapes forming a regulating passage therebetween. The shaft has helical grooves that spiral around the shaft to one or both ends to impart rotation to the shaft and spray head.
대표청구항▼
1. A fluid bearing nozzle assembly for spraying high pressure fluid comprising: a hollow cylindrical body;an inlet nut fastened to the cylindrical body; anda hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body, the inlet nut having a
1. A fluid bearing nozzle assembly for spraying high pressure fluid comprising: a hollow cylindrical body;an inlet nut fastened to the cylindrical body; anda hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body, the inlet nut having a stem portion extending into a central bore through the shaft member, the stem portion forming an inlet bearing area rotatably carrying the shaft member thereon, the shaft member having an outlet end near an outlet end of the housing body, the outlet end of the shaft member receiving a spray head fastened thereto for rotation of the head with the shaft member, said inlet nut having a central passage to conduct fluid through the inlet nut to said outlet end of the shaft member;an inner wall of the housing body and an outer portion of the shaft having complementary surface shapes together forming a regulating passage therebetween, said shaft member having one or more bores communicating between the inlet bearing area and the regulating passage, wherein pressure of fluid within the regulating passage acts axially upon the shaft to counter axial force on the shaft resulting from fluid pressure acting upon an inlet end of the shaft, and wherein the outer portion of the shaft has a helical groove there-around extending from the one or more bores along a substantial portion of the outer portion of the shaft and wherein fluid flow through the regulating passage and the helical groove imparts a rotational torque on the shaft to cause rotation of the shaft on the stem portion of the inlet nut. 2. The nozzle according to claim 1 wherein the inner wall of the housing body and the outer portion of the shaft have complementary frusto-conical shapes. 3. The nozzle according to claim 2 wherein the one or more bores communicates to an annular channel in the outer surface of the shaft and the shaft has two counter rotating grooves around the shaft leading from the annular channel to opposite ends of the shaft. 4. The nozzle according to claim 1 wherein the inner wall of the housing body has a stepped cylindrical shape with a large diameter portion and a small diameter portion with a shoulder therebetween. 5. The nozzle according to claim 4 wherein the shaft has a complementary stepped cylindrical shape with a shoulder therebetween and the one or more bores communicate with the shoulder of the shaft. 6. The nozzle according to claim 5 wherein the shaft has a single helical groove that extends from the shoulder around a substantial portion of the length of the large diameter portion of the shaft. 7. The nozzle of claim 1 wherein a rear face of the shaft and the inlet nut form therebetween a balancing chamber and wherein the hollow body has one or more weep holes communicating with the balancing chamber for relieving fluid from within the balancing chamber. 8. The nozzle of claim 7 further comprising a cylindrical shroud fastened around the hollow body that extends around a portion of the spray head, wherein the weep holes in the hollow body communicate between the balancing chamber and a gap between the shroud and the hollow body. 9. The nozzle of claim 8 wherein fluid in the gap is relieved to atmosphere through at least one passage between the shroud and the housing body. 10. The nozzle of claim 7 wherein the balancing chamber and regulating passage connect together and a portion of fluid flow through the central bore flows along the inlet bearing area to the balancing chamber and to the regulating passage. 11. A nozzle assembly for spraying high pressure fluid against an object comprising: a hollow cylindrical body;an inlet nut fastened to the cylindrical body;a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body, the inlet nut having a stem portion extending into a central bore through the shaft member, the stem portion forming an inlet bearing area rotatably carrying the shaft member thereon, the shaft member having an outlet end near an outlet end of the housing body, the outlet end of the shaft member receiving a spray head fastened thereto for rotation of the head with the shaft member, said inlet nut having a central passage to conduct fluid through the inlet nut to said outlet end of the shaft member; anda tubular shroud around the hollow body, the shaft member and the spray head, the shroud fastened to a portion of the hollow body;an inner wall of the housing body and an outer portion of the shaft having complementary surface shapes together forming a regulating passage therebetween, said shaft member having one or more bores communicating between the inlet bearing area and the regulating passage, wherein pressure of fluid within the regulating passage acts axially upon the shaft to counter axial force on the shaft resulting from fluid pressure acting upon an inlet end of the shaft, and wherein the outer portion of the shaft has a helical groove there-around extending from the one or more bores along a substantial portion of the outer portion of the shaft and wherein fluid flow through the regulating passage and the helical groove imparts a rotational torque on the shaft to cause rotation of the shaft on the stem portion of the inlet nut, and wherein a portion of fluid flow through the regulating passage passes through one or more weep holes through the housing body to a gap formed between the housing body and the shroud. 12. The nozzle according to claim 11 wherein the inner wall of the housing body and the outer portion of the shaft have complementary frusto-conical shapes. 13. The nozzle according to claim 12 wherein the one or more bores communicates to an annular channel in the outer surface of the shaft and the shaft has two counter rotating grooves around the shaft leading from the annular channel to opposite ends of the shaft. 14. The nozzle according to claim 11 wherein the inner wall of the housing body has a stepped cylindrical shape with a large diameter portion and a small diameter portion with a shoulder therebetween. 15. The nozzle according to claim 14 wherein the outer surface of the shaft has a complementary stepped cylindrical shape with a shoulder therebetween and the one or more bores communicate with the shoulder of the shaft. 16. The nozzle according to claim 15 wherein the shaft has a single helical groove that extends from the shoulder around a substantial portion of the length of the large diameter portion of the shaft. 17. The nozzle of claim 11 wherein a rear face of the shaft and the inlet nut form therebetween a balancing chamber and wherein the hollow body has one or more weep holes communicating with the balancing chamber for relieving fluid from within the balancing chamber. 18. The nozzle of claim 17 wherein the balancing chamber and regulating passage connect together and a portion of fluid flow through the central bore flows along the inlet bearing area to the balancing chamber and to the regulating passage. 19. A nozzle assembly for spraying high pressure fluid against an object comprising: a hollow cylindrical body;an inlet nut fastened to the cylindrical body;a hollow tubular shaft member coaxially carried within the housing body and captured between the inlet nut and the body, the inlet nut having a stem portion extending into a central bore through the shaft member, the stem portion forming an inlet bearing area rotatably carrying the shaft member thereon, the shaft member having an outlet end near an outlet end of the housing body, the outlet end of the shaft member receiving a spray head fastened thereto for rotation of the head with the shaft member, said inlet nut having a central passage to conduct fluid through the inlet nut to said outlet end of the shaft member; anda tubular shroud around the hollow body, the shaft member and the spray head, the shroud fastened to a portion of the hollow body;an inner wall of the housing body and an outer portion of the shaft having complementary surface shapes together forming a regulating passage therebetween, said shaft member having one or more bores communicating between the inlet bearing area and the regulating passage, wherein pressure of fluid within the regulating passage acts axially upon the shaft to counter axial force on the shaft resulting from fluid pressure acting upon an inlet end of the shaft, and wherein the outer portion of the shaft has a helical groove there-around extending from the one or more bores along a substantial portion of the outer portion of the shaft and wherein fluid flow through the regulating passage and the helical groove imparts a rotational torque on the shaft to cause rotation of the shaft on the stem portion of the inlet nut, and wherein a portion of fluid flow through the regulating passage passes through one or more weep holes through the housing body to a gap formed between the housing body and the shroud, wherein a rear face of the shaft and the inlet nut form therebetween a balancing chamber communicating with the one or more weep holes for relieving fluid from within the balancing chamber. 20. The nozzle according to claim 19 wherein the inner wall of the housing body and the outer portion of the shaft have complementary frusto-conical shapes. 21. The nozzle according to claim 20 wherein the one or more bores communicates to an annular channel in the outer surface of the shaft and the shaft has two counter rotating grooves around the shaft leading from the annular channel to opposite ends of the shaft. 22. The nozzle according to claim 19 wherein the inner wall of the housing body has a stepped cylindrical shape with a large diameter portion and a small diameter portion with a shoulder therebetween. 23. The nozzle according to claim 22 wherein the shaft has a complementary stepped cylindrical shape with a shoulder therebetween and the one or more bores communicate with the shoulder of the shaft. 24. The nozzle according to claim 23 wherein the shaft has a single helical groove that extends from the shoulder around a substantial portion of the length of the large diameter portion of the shaft. 25. The nozzle of claim 19 wherein the balancing chamber and regulating passage connect together and a portion of fluid flow through the central bore flows along the inlet bearing area to the balancing chamber and to the regulating passage.
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