Centrifugal pump assembly
阅读：150发布：2021-10-16
专利汇可以提供Centrifugal pump assembly专利检索，专利查询，专利分析的服务。并且A fluid delivery system, particularly suitable for vehicles for pumping water from a supply tank, and including a centrifugal pump and a motor for driving same. A pressure and flow sensitive control device associated with the water as discharged from the pump controls a switch which activates the motor, whereby the motor and pump are energized and de-energized in response to the movements of the control device, which control device in turn is moved in response to the external demand for water. The pump housing has a removable end cover which is secured to the housing by resilient releasable clips, which clips permit the end cover to be partially or totally released from the housing when a predetermined force is developed internally of the housing, such as caused by freezing of the water within the housing. A control plate is disposed closely adjacent the discharge side of the rotor for preventing the pressurized fluid from intimately contacting and applying a large axially directed force to the rotor, thereby effectively isolating the pressurized discharged fluid from the rotor to thus minimize rotor wear.，下面是Centrifugal pump assembly专利的具体信息内容。
1. In a liquid supply system having a supply tank, at least one outlet valve, a pump connected between the supply tank and the outlet valve, the pump having an inlet in communication with the tank, a motor drivingly connected to the pump, and a flow and pressure sensing control device connected in series between the discharge of the pump and the outlet valve for automatically energizing and de-energizing said motor in response to the demand for liquid through said control device, comprising the improvement wherein: said pump includes housing means and a pump rotor rotatably supported relative to said housing means, said housing means including wall means defining a chamber in which is positioned said pump rotor, said chamber being open at one end thereof, said housing means also including separable end wall means positioned adjacent said first-mentioned wall means for closing the one end of said chamber, coupling means coacting between said first-mentioned wall means and said end wall means for fixedly but releasably connecting same to close said one end of said chamber, said coupling means being automatically releasable upon development of a predetermined force within said chamber as imposed on said end wall means for permitting at least a portion of said end wall means to be moved away from said first-mentioned wall means to at least partially uncover said one end of said chamber, and a substantially imperforate control plate positioned closely adjacent an axial end face of said rotor, said control plate being substantially coextensive with said axial end face of said rotor and disposed axially between said rotor and said end wall means, said control plate being spaced from said end wall means to define a liquid collection chamber therebetween, at least a portion of the periphery of said control plate being spaced from the inner periphery of said first-mentioned wall means to define a narrow clearance space therebetween for permitting liquid discharged from said rotor to flow through said narrow clearance space directly into said collection chamber.
2. A system according to claim 1, wherein said firstmentioned wall means includes a platelike wall member positioned closely adjacent and substantially coextensive with the other axial end face of said rotor, and an annular supply chamber formed within said pump housing means and positioned directly adjacent said platelike wall member, said rotor being constructed of a plastic material and having a plurality of flow passages extending radially thereof with the outer ends of said flow passages terminating adjacent the outer periphery of the rotor and the inner ends of said flow passages terminating adjacent the center of the rotor and communicating with said annular supply chamber.
3. A system according to claim 2, wherein said coupling means includes a plurality of releasable resilient clips coacting between said end wall means and said first-mentioned wall means at a plurality of annularly spaced locations positioned in surrounding relationship to the rotor.
4. A pump and motor assembly including a centrifugal pump having housing means defining an internal chamber and a pump rotor rotatably disposed within said internal chamber, and motor means drivingly connected to said rotor for permitting rotation of same, said rotor having a plurality of flow passages extending radially thereof, with the inlet ends of said flow passages being disposed adjacent the center portion of said rotor and the outlet ends of said flow passages being disposed adjacent the outer periphery of said rotor, comprising the improvement wherein: said housing means including first and second end walls positioned on opposite axial sides of said rotor and a peripheral sleevelike wall extending between the oUter edges of said end walls in surrounding relationship to and spaced from the periphery of said rotor, said first end wall being positioned closely adjacent but slightly axially spaced from the adjacent axial face of said rotor, said rotor having an annular bearing portion rotatably supported on said first end wall, said first end wall further having opening means therethrough adjacent the center portion of said rotor and communicating with the inlet ends of said flow passages for permitting liquid to be supplied thereto, the other end wall being axially spaced a substantial distance from the other axial face of said rotor, a substantially annular flow control plate stationarily positioned closely adjacent but slightly spaced from said other axial end face of said rotor, said flow control plate being substantially imperforate and substantially coextensive with the other axial end face of said rotor, said flow control plate being disposed axially between the rotor and said other end wall and being spaced from said other end wall to define a liquid collection chamber therebetween, at least a portion of the outer periphery of said flow control plate being slightly spaced from said peripheral sleevelike wall to define a narrow flow clearance space therebetween for permitting liquid discharged from said rotor to flow through said clearance space into said collection chamber, whereby said control plate prevents the pressurized water discharged from the said rotor from imposing a large unbalanced axial force on said rotor, and said housing means including a discharge port formed therein and communicating with said collection chamber.
5. An assembly to claim 4, wherein said flow control plate has a plurality of substantially perpendicularly extending legs secured thereto adjacent the periphery thereof at a plurality of circumferentially spaced locations, said legs being fixedly engaged with the inner periphery of said peripheral sleevelike wall for maintaining said control plate stationarily positioned concentrically within said peripheral wall, said control plate having an outer diameter slightly less than the inner peripheral diameter of said peripheral wall for defining a narrow annular clearance space therebetween.
6. An assembly according to claim 4, wherein said other end wall is separable from said peripheral wall, said other end wall and said peripheral wall each having annular flange portions positionable adjacent one another, and releasable coupling means coacting between said flange portions for fixedly but releasably maintaining said other end wall in closed sealing engagement with said peripheral wall, said releasable coupling means including means for permitting said other end wall to at least partially automatically separate from said peripheral wall upon the occurrence of a predetermined pressure within said collection chamber.
7. An assembly according to claim 6, wherein said releasable coupling means includes a plurality of resilient releasable clips coacting between said flange portions.
8. In a water supply system having a supply tank, at least one outlet valve, a pump connected between the supply tank and the outlet valve, the pump having an inlet in communication with the tank, a motor drivingly connected to the pump, and a flow and pressure sensing control device connected in series between the discharge of the pump and the outlet valve for automatically energizing and de-energizing said motor in response to the demand for water through said control device, comprising the improvement wherein: said pump includes housing means and a pump rotor rotatably supported relative to said housing means, said housing means including wall means defining a chamber in which is positioned said pump rotor, said chamber being open at one end thereof, said housing means also including a separable end wall positioned adjacent said wall means for closing the one end of said chamber, said end wall having an outlet opening formed therein for permitting discHarge of water from said chamber, coupling means coacting between said wall means and said end wall (1) for fixedly but releasably connecting same to close said one end of said chamber and (2) for permitting said end wall to at least partially automatically separate from said wall means due to freezing of the water contained within said chamber, said wall means and said end wall each having annular flanges disposed adjacent one another, and said coupling means including a plurality of resilient releasable clips coacting between said flanges at a plurality of circumferentially spaced locations, each of said clips includes a pair of substantially perpendicular resilient leg portions having their adjacent ends fixedly connected together, one of said clips being provided with an arcuate hook adjacent the free end thereof, the other of said leg portions being provided with a transversely projecting portion adjacent the free end thereof.
9. A system according to claim 8, wherein said flow and pressure sensing control device includes a housing member positioned above said housing means and defining therein a priming compartment for collecting a supply of water capable of priming said pump, said housing member including a portion thereof disposed in sealed relationship with the outlet opening formed in said end wall whereby the water as discharged from said chamber is supplied to said priming compartment.
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