Variable fill fluid coupling专利检索-需求侧响应分销网络和设备专利检索查询-专利查询网

Variable fill fluid coupling

阅读：91发布：2021-10-13

专利汇可以提供Variable fill fluid coupling专利检索，专利查询，专利分析的服务。并且In variable fill fluid couplings of the type disclosed herein, a driving impeller and a driven runner are coupled for joint rotation by means of a liquid medium in an active liquid chamber formed by the rotating members. The driving impeller is driven at a constant speed by an electric motor, and the active liquid chamber is both continuously bled and continuously fed at rates that can be changed to vary the level of fill of liquid therein. The percentage of liquid fill in the active liquid chamber determines the degree of slip of the runner relative to the impeller which, in turn, determines the speed of the runner under a given load and hence the speed of the output shaft. Such couplings are particularly useful for driving centrifugal pumps at variable rates to maintain a constant pressure in a line on the discharge side of the pump that is subject to a variable demand. To control the rate of fill in a manner that responds rapidly to changes in demand, charging liquid is fed from a source through an orifice which directs the charging liquid into a flowing stream aligned to enter the mouth of the active liquid chanber. A splitter assembly is pivotally mounted to swing in a plane that extends transversely of the flowing stream between the orifice and the mouth of the chamber in order to deflect a portion of the flowing stream away from the mouth. Control means responsive to pressure at the discharge side of the pump causes the splitter assembly to pivot in order to vary the quantity of liquid entering the mouth of an active liquid chamber.，下面是Variable fill fluid coupling专利的具体信息内容。

权利要求

1. In a variable fill type liquid coupling having a housing, a driving impeller rotatably mounted in said housing, a driven runner rotatably mounted within said housing in liquid coupling relation with said impeller, shroud means for forming an active liquid chamber between said runner and impeller, said shroud means being provided with a mouth for receiving charging liquid directed into said active liquid chamber, means for centrifugally bleeding said active liquid chamber, and a source of charging liquid within said housing, the improvement comprising orifice defining means located within said housing at a position adjacent the mouth of said active liquid chamber, means for directing charging liquid from said liquid source to said orifice defining means to produce a flowing stream of liquid aligned to enter said mouth, a splitter arm pivotally mounted within said housing to swing in a plane that extends across the flowing stream between the orifice defining means and the active liquid chamber mouth for deflecting a portion of the flowing stream away from the mouth, and control means for pivoting the splitter arm to vary the quantity of liquid entering the mouth of the active liquid chamber.

2. In a variable fill type liquid coupling as described in claim 1, said stream of charging liquid forming a shallow angle with the plane of said mouth so that said charging liquid is directed to the outer periphery of said active liquid chamber substantially without any deflection other than deflection in the rotary direction of movement of the coupling.

3. In a variable fill type liquid coupling as set forth in claim 2, saidd shroud means being provided with radially extending blades for intercepting said stream of charging liquid in order to give it a rotary component of motion before it reaches the outer periphery of said shroud means.

4. In a variable fill type liquid coupling as described in claim 1, said coupling further including an output shaft coupled to said driven runner for rotation about a common axis, said active liquid chamber mouth having an annular lip spaced from said output shaft in a plane perpendicular to said axis of rotation, said shroud means extending axially of the shaft from said mouth encompassing said driven runner, and said orifice defining means being aligned to direct the flowing stream of liquid into said mouth at a shallow angle with the plane perpendicular to the axis of rotation of the shaft so that liquid entering the mouth directly charges liquid held by centrifugal force in the outer circumferential portion of the active liquid chamber.

5. In a variable fill type liquid coupling as set forth in claim 4, said shroud means being provided with radially extending blades for intercepting said stream of charging liquid in order to give it a rotary component of motion.

6. In a variable fill type liquid coupling as described in claim 1, wherein the splitter arm is mounted for pivotal movement about an axis that extends in substantially the same vertical plane as the centerline of the orifice defining means and the centerline of the flowing stream of liquid aligned to enter the active liquid chamber mouth.

7. In a variable fill type liquid coupling as described in claim 6, wherein said splitter arm comprises an angle-shaped vane having one leg extending in the plane transversely of the flowing stream between the active liquid chamber and the orifice defining means and another leg extending generally perpendicularly from said one leg towards the orifice defining means.

8. In a variable fill type liquid coupling as described in claim 6, wherein said splitter arm is provided with a lever arm extending laterally from the pivot axis thereof, and said control means includes a pressure responsive plunger mounted to bear upon the lever arm in a given direction, a compression spring mounted to bear upon the lever arm in a direction opposite to said given direction, and an adjusting screw having one end operatively engagingg the compression spring to regulate the compressive force therein.

9. In a variable fill type liquid coupling as described in claim 8, wherein said adjustment screw extends through said housing for manual adjustment thereof, said control means further including a stop plate threadably fitted upon said adjusting screw and arranged to bear against the compression spring so as to compress the spring between the stop plate and the lever arm, said stop plate having a notch therein offset from the location where tHe stop plate is threadably connected to the adjusting screw, and a guide rod extending from said housing through said notch in the stop plate to prevent the stop plate from turning with rotation of the adjusting screw.

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Variable fill fluid coupling

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