Linear control valve

Patent metadata

Field	Value
Publication number	US-10816096-B2
Application number	US-201515320587-A
Country	US
Kind code	B2
Filing date	Jul 3, 2015
Priority date	Jul 4, 2014
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

To achieve a compactly designed, simple and robust control valve for a hydrodynamic torque generator which is linear over a wide adjustment range, the control channel (12) of the control valve is formed in such a way that a substantially linear relationship between valve position (α) and flow ({dot over (V)}) is achieved by rotating the valve body (6) between a first valve position (α1), which differs from the closed position, and a second valve position (α2) with a larger flow ({dot over (V)}) than in the first position (α1).

First claim

The invention claimed is:

1. A method for controlling a hydrodynamic torque generator comprising:
setting a load torque (MB) of the hydrodynamic torque generator by a control valve, wherein the control valve is arranged at an outlet of the torque generator;
controlling an amount ({dot over (V)} zu ) of operating medium fed to the torque generator, through an inlet of the torque generator, via a speed-controlled pump;
controlling an amount ({dot over (V)} ab ) of operating medium flowing from the torque generator via the control valve, so that a level of operating medium causes a desired load torque (M B ) in the torque generator,
wherein the control valve includes
a valve housing including
an inlet opening,
an outlet opening, and
a flow channel extending from the inlet opening to the outlet opening, the flow channel defining a longitudinal axis; and

a cylindrical valve body rotatably mounted in the flow channel such that an axis of rotation thereof is normal to the longitudinal axis of the flow channel;

wherein the flow channel defines an inflow cross-section at an inlet to the valve body immediately upstream of the valve body and an outflow cross-section at a valve body outlet immediately downstream of the valve body, the outflow cross-section being larger than the inflow cross-section;
wherein said valve body has a cutout portion which provides a control channel that extends through the valve body and defines a sealing land which at least partially seals the flow channel at the inlet to the valve body when the valve body is in a closed positioning and achieves a substantially linear relationship between valve body positioning and media flow through the valve housing when the valve body is rotated between a first, not closed, positioning and a second positioning with a greater flow than when in the first positioning; and
wherein rotation of the valve body causes the sealing land to rotate through the flow channel at the valve body outlet and result in linear increases or decreases in flow through the valve housing; and
wherein the cylindrical valve body is configured and arranged to rotate more than 90 degrees relative to the valve housing.

2. A control valve for media which comprises:
a valve housing having an inlet opening, an outlet opening, and a flow channel extending from the inlet opening to the outlet opening, the flow channel defining a longitudinal axis; and
a cylindrical valve body rotatably mounted in the flow channel such that an axis of rotation thereof is normal to the longitudinal axis of the flow channel, and the cylindrical valve body is configured and arranged to rotate more than 90 degrees relative to the valve housing;
wherein the flow channel defines an inflow cross-section at an inlet to the valve body immediately upstream of the valve body and an outflow cross-section at a valve body outlet immediately downstream of the valve body, the outflow cross-section being larger than the inflow cross-section;
wherein said valve body has a cutout portion which provides a control channel that extends through the valve body and defines a sealing land, the sealing land configured and arranged to
at least partially seal the flow channel at the inlet to the valve body when the valve body is in a closed position,
achieve a substantially linear relationship between the valve body positioning and media flow through the valve housing when the valve body is rotated between a plurality of not closed positions, and
rotate through the flow channel in response to rotation of the valve body.

3. The control valve according to claim 2 , wherein said valve body includes a connecting bridge diametrically opposite the sealing land.

4. The control valve according to claim 3 , wherein said connecting bridge comprises two spaced connecting lands.

5. The control valve according to claim 2 , wherein a radial gap for media flow is provided between an outer surface of the valve body and the valve housing.

6. The control valve according to claim 5 , wherein said valve body includes a circumferential land which extends outwardly from the outer surface at at least one axial end of the outer surface.

7. A combination of a hydrodynamic torque generator which has an outlet and a control valve according to claim 2 , the control valve being positioned to control flow of operating medium from the outlet of the hydrodynamic torque generator.

8. The control valve according to claim 2 , wherein rotation of the sealing land within the flow channel at the valve body outlet results in a linear change in flow through the valve housing.

9. A method for controlling a hydrodynamic torque generator with which a load torque (MB) of the torque generator is set by the control valve according to claim 2 , wherein the control valve is arranged at an outlet of the torque generator, wherein an amount ({dot over (V)} zu ) of operating medium which is fed to the torque generator is controlled at the inlet of the torque generator by a speed-controlled pump, and an amount ({dot over (V)} ab ) of operating medium flowing from the torque generator is controlled by the control valve, so that a level of operating medium which brings about a desired load torque (M B ) is set up in the torque generator.

10. A hydrodynamic torque generator comprising:
an outlet; and
a control valve positioned to control flow of operating medium from the outlet of the hydrodynamic torque generator, the control valve including
a valve housing including
an inlet opening,
an outlet opening, and
a flow channel extending from the inlet opening to the outlet opening, the flow channel defining a longitudinal axis; and

a cylindrical valve body rotatably mounted in the flow channel such that an axis of rotation thereof is normal to the longitudinal axis of the flow channel;
wherein the flow channel defines an inflow cross-section at an inlet to the valve body immediately upstream of the valve body and an outflow cross-section at a valve body outlet immediately downstream of the valve body, the outflow cross-section being larger than the inflow cross-section; and
wherein said valve body has a cutout portion which provides a control channel that extends through the valve body and defines a sealing land which at least partially seals the flow channel at the inlet to the valve body when the valve body is in a closed positioning and achieves a substantially linear relationship between valve body positioning and media flow through the valve housing when the valve body is rotated between a first, not closed, positioning and a second positioning with a greater flow than when in the first positioning,
wherein the cylindrical valve body is configured and arranged to rotate more than 90 degrees relative to the valve housing.

11. The hydrodynamic torque generator of claim 10 , wherein rotation of the valve body causes the sealing land to rotate through the flow channel at the valve body outlet and result in linear increases or decreases in flow through the valve housing.

Assignees

• Avl List Gmbh

Inventors

• Eitzinger Johann
• Gruber Hannes
• Monschein Martin

Classifications

• F16K5/12 Primary

  Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve · CPC title

• F15B11/044

  by means in the return line {, i.e. "meter out"}(F15B11/046, F15B11/05 take precedence) · CPC title

• B60T10/02

  with hydrodynamic brake · CPC title

• F16K5/0407 Primary

  with particular plug arrangements, e.g. particular shape or built-in means · CPC title

• B60T13/18

  with control of pump output delivery {, e.g. by distributor valves (B60T13/167 takes precedence)} · CPC title