DE102016218924A1 - Tubular rotary valve to minimize hydraulic pressure losses in high-flow thermal management modules - Google Patents

Abstract

The invention relates to a rotary valve (1) for a thermal management module, which is designed for conducting and / or distributing heat-conducting fluids in a motor vehicle, with a part-spherical rotary valve body (2), wherein the rotary valve body (2) on its lateral surface (3) at least one Through opening (4) to regulate the fluid supply of connected lines, and with a rotary valve body (2) movably overlapping housing (5), wherein the rotary valve body (2) of the passage opening (4) outgoing a flow-carrying pipe part (6) , The invention also includes a thermal management module with a rotary valve (1) according to the invention.

Description

The present invention relates to a rotary valve for a thermal management module / thermal management module, which is designed for conducting and / or distribution of heat-conducting fluids in a motor vehicle, with a part-spherical / kugelkalottenartigen rotary valve body, wherein the rotary valve body on its lateral surface at least one through hole, such as a long hole , a round, oval or square hole, to regulate the fluid supply from connected lines / control and with the rotary valve body movably supported housing. Furthermore, the invention also relates to a thermal management module with such a rotary valve.

Thermal management modules or thermal management modules are rotary slide units, which are used in internal combustion engines in the cooling circuit or oil circuit and where appropriate, completely or partially throttle the volume flow generated by a pump or distribute it to the relevant heat sources and sinks in sub-circuits. This internal combustion engines for vehicles, but also other applications such as aircraft, agricultural machinery, stationary applications, etc. conceivable.

Various embodiments of thermal management modules are well known in the art.

For example, the DE 10 2014 211 641 A1 a method for position control of the rotary valve of a thermal management module as Kühlmittelverteil- and / or blocking unit for the drive train and / or internal combustion engine of motor vehicles and / or for internal combustion engines, wherein the rotary valve is arranged in a module housing and connected to a rotary valve shaft, which is driven by an electric motor , wherein on the module housing fluid connections and the rotary valve at least one control cross-section are provided, the current consumption of the electric motor is monitored and wherein an increase in power consumption is interpreted as a position detection of / the end stops or other desired switching positions.

From the DE 10 2014 207 204 A1 is a heat management module as Kühlmittelverteil- and / or blocking unit for the drive train and / or the internal combustion engine of motor vehicles, which has a module housing and a module housing arranged rotary valve with rotary valve shaft, wherein on the module housing fluid connections and the rotary valve control cross sections are provided, in Extension of the rotary valve shaft is installed a secondary rotary valve in the module housing, that the rotary valve and the secondary rotary valve are arranged concentrically to each other and that between the slides a transmission drive unit is provided.

From the DE 10 2014 207 198 A1 a similar thermal management module is known, in which case unlike that in the DE 10 2014 207 204 A1 disclosed heat management module of the rotary valve and the secondary spool are arranged offset in axial direction to each other and between the sliders also a transmission drive unit is provided.

Other variants of a thermal management module are, for example, from the DE 10 2015 210 157 A1 , of the DE 10 2014 207 202 A1 or the DE 10 2014 207 201 A1 known.

The heat management modules hitherto known from the prior art are constructed in such a way that an axially flowing volume flow, which has already passed the cylinder head / cylinder block from the water pump, is centrally combined in the interior of the heat management module and from there via the outputs to be switched. Consumers will be paid proportionately. In this case, the outflowing volume flow, which can be high, especially at the larger consumers, such as, for example, a bypass or a cooler, is not really performed geometrically. This has the consequence that the fluid flows out of the central space inside the thermal management module out radially outward and experiences an undefined flow deflection and resulting stalls, which especially at full opening of the outputs, especially the outputs for the large consumers, such as the bypass and / or the cooler, with large volume flow values, leads to undesirably high pressure losses.

Much of the pressure loss is generated as the fluid flows out of the interior of the thermal management module through the open ports into the ports.

The object of the invention is to avoid or at least mitigate the disadvantages of the prior art, and in particular to provide a thermal management module which reduces the pressure losses due to deflection of the fluid flows to a minimum.

The object of the invention is achieved in a generic thermal management module according to the invention in that the rotary valve body has a flow-carrying pipe part outgoing from the passage opening / has.

Advantageous embodiments are claimed in the subclaims and are explained below.

Thus, it is advantageous if the housing has a fluid supply opening. About this flows of (axial) flow, which, for example, comes from the water pump, in the rotary valve.

For the volume flow guide, it is advantageous if the pipe part leads to the fluid supply opening and / or is stored there. As a result, the fluid flow coming from the fluid feed opening is deflected by means of the tube part to the corresponding outlet / consumer, whereby the flow loss is much less pronounced and the pressure loss due to deflection of the fluid flow can be minimized.

It is particularly flow-friendly if the pipe part is designed as a pipe bending part with a uniform curvature. As a result, the fluid flow is deflected particularly gently, whereby stalls due to the fluid flow deflection can be virtually avoided.

For sealing between the housing and the rotary valve body, it is advantageous if a primary seal is present / arranged in the region of the passage opening. As a result, the housing and the rotary valve body are sealed against fluid leakage at their connection area.

It is also advantageous if such a geometry is present at one of the fluid supply opening facing the end of the pipe part, which is forced a flow constriction. It is particularly advantageous in this case if the geometry is designed in the manner of a nozzle. By such a nozzle-like design of the pipe part, the flow can be gently and steadily reduced to a diameter, which has the nozzle, which lies in the further course of flow. As a result, a pressure loss reduction can be generated.

Another exemplary embodiment provides that the tube part is designed as a pipe bending part with irregular curvature. Furthermore, here the fluid supply opening in the housing can also be off-centered, i. deviating from the axis of rotation of the rotary valve body, be arranged.

The invention also relates to a thermal management module with a rotary valve according to the invention.

In other words, the invention is that the pressure loss minimization on the guiding and especially the guided redirecting of the fluid from the interior of the thermal management module (axial flow) through the switched output (radial flow) in the area of a nozzle happens. For this purpose, corresponding curved, fluid-carrying geometries are implemented on the rotary valve body.

It can therefore be said that the invention comprises easily bundling the flow path along the flow inside the thermal management module (nozzle) in order to bring the flow to a flow path diameter on which it is then deflected in a 90 ° bend within the thermal management module ., the rotary valve can already be deflected controlled and then already has the correct velocity vector when leaving the rotary valve area.

Such a rotary valve must therefore be constructed of a nozzle-like geometry, which can also take over the task of the rotary valve shift to thermal management module housing in the front area, a deflecting pipe area, which is responsible for the optimization of the pressure losses, and an area surrounding the pipe end, the , as already known from the prior art, is designed as a surrounding ball / part ball.

Significant for industrial implementation here is the execution of the nozzle or the pipe part with surrounding ball part, which both must be positioned to each other and finally joined, for example by means of plastic welding.

The invention will be explained in more detail with the aid of figures, in which different embodiments are shown. Show it:

1 a first perspective view of a first embodiment of a rotary valve according to the invention in a rotary valve housing;

2 a second perspective view of the in 1 already shown first embodiment of the rotary valve from another side;

3 a top view of the arranged in the housing rotary valve;

4 a perspective view of the housing;

5 a perspective view of the rotary valve;

6 a sectional view of the rotary valve;

7 a side view seen from the direction of the arrow VII in 6 ;

8th a side view as seen along the direction of the arrow VIII in 6 ;

9 a plan view of the rotary valve in the same position as the sectional view 6 ; and

10 a sectional view of the rotary valve analogous to 6 with the housing surrounding the rotary valve.

The figures are merely schematic in nature and are only for the understanding of the invention. The same elements are provided with the same reference numerals.

Features of the individual embodiments can also be realized in other embodiments. So they are interchangeable.

1 shows a rotary valve 1 in a first perspective view. The rotary valve 1 consists of a rotary valve body 2 , which is designed like a partial ball or kugelkalottenartig. This means the rotary valve body 2 has a geometry that corresponds to a sphere cut off on two opposite sides.

The rotary valve body 2 has a lateral surface 3 , which in the embodiment shown here a passage opening 4 having. About this passage opening 4 the fluid supply from connected lines (here exemplified two) is controlled or controlled. The rotary valve 1 or the rotary valve body 2 are in a housing 5 , which is cylindrical here, movably mounted. The housing 5 owns on a face 7 a fluid supply port 8th (please refer 4 ). The rotary valve body 2 has one of the passage opening 4 outgoing pipe part 6 leading to a fluid feed opening 8th of the housing 5 leads.

Furthermore, in the figure, two primary seals 9 . 10 pictured, which in the housing 5 in the area of radial passage openings 11 . 12 are arranged to these against fluid leakage at the interface or the connection / transition region of the rotary valve body 2 to the housing 5 seal. The radial through holes 11 . 12 correspond to so-called outputs 13 or distribution openings 13 and lead from the fluid supply port 8th coming volume flow of a fluid the respective via the distribution openings 13 connected components, such as the bypass or the radiator. Further, at the thermal management module housing 5 other associated elements connected, such as secondary seals, spring, nozzle, O-ring, etc., which are not shown here.

2 shows the rotary valve 1 , which the rotary valve body 2 as well as the housing 5 includes, in another perspective view. It is easy to see a connection here 14 , which serves as a rotary connection to the rotary valve shaft (not shown) and realizes the rotating active connection to an actuator gate (see also 8th ). In 8th respectively. 2 is a cross-like geometry 15 to recognize, in the middle of the connection 14 is positioned. Such geometry is used to save material and / or weight.

3 shows the rotary valve 1 from above without the appearance of the housing 5 , In this view, the position of the primary seals 9 . 10 which the position of the through holes 11 . 12 in the case 5 (please refer 4 ) to recognize. In the illustration shown here is the passage opening 11 (please refer 4 ) over the pipe part 6 with the fluid supply port 8th (please refer 4 ) connected so that a through the Fluidzuführöffnung 8th (axial) inflowing volume flow exclusively through the passage opening 4 in the rotary valve body 2 and the through hole 11 in the case 5 (radial) flows out. The passage opening 12 (please refer 4 ) is in this position of the rotary valve body 2 completely closed.

9 shows a view from below, ie from the opposite direction of the view of 3 , the rotary valve body 2 , On the left side in this figure is the connection 14 shown, in time is an end of the pipe part 6 to see which one constriction area 16 having. This means that in this area has the pipe part 6 a reduced diameter. This constriction area 16 has a nozzle-like effect on the volume flow. Above in the figure is the primary seal 9 to see which, however, not fixed to the rotary valve body 2 is connected and shown only to clarify the position of the distributor output.

5 shows the rotary valve body 2 in the same perspective view as before 1 but without the rotary valve body 2 surrounding housing 5 , As "guidance" are also in 5 the primary seals 9 . 10 Shown to the positions of the through holes 11 . 12 to illustrate.

The 6 to 8th such as 10 show further views of the rotary valve body 2 with and without housing 5 to clarify the geometry.

Based on 4 and 5 briefly becomes the switching logic of the rotary valve 1 explained. An over the fluid supply port 8th axial inflowing volume flow is via the pipe part 6 and the positioning of the rotary valve body 2 relative to the housing 5 redirected and regulated or controlled. The different possibilities, a volume flow over the radial through holes 11 . 12 dissipate are called switching logic. With the rotary valve shown here 1 can the opening 11 completely opened and the opening 12 be completely closed, the opening 11 and the opening 12 each partially open (corresponds to an intermediate position of the passage opening 4 of the rotary valve body 2 so that the opening 4 a part of the opening 11 and part of the opening 12 covered) or the opening 12 completely opened and the opening 11 be completely closed, as well as both the opening 11 as well as the opening 12 be completely closed.

However, the switching logic and the number of existing openings in the housing 5 as well as in the rotary valve body 2 to be changed.

The embodiment described herein, in which the fluid flow as an axial flow flows into the rotary valve body and flows out of it as one or more radial flow (s), is merely illustrative and not restrictive of the invention. For example, the flow directions may be reversed, i. the fluid stream flows as a radial flow in the rotary valve body and as an axial flow from the rotary valve body.

LIST OF REFERENCE NUMBERS

1

 rotary vane

2

 Rotary valve body

3

 lateral surface

4

 Through opening

5

 casing

6

 pipe part

7

 face

8th

 fluid supply

9

 primary seal

10

 primary seal

11

 radial passage opening

12

 radial passage opening

13

 distributor opening

14

 connection

15

 cruciform geometry

16

 constricted

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014211641 A1 [0004]
• DE 102014207204 A1 [0005, 0006]
• DE 102014207198 A1 [0006]
• DE 102015210157 A1 [0007]
• DE 102014207202 A1 [0007]
• DE 102014207201 A1 [0007]

Claims (10)

Rotary valve ( 1 ) for a thermal management module, which is designed for conducting and / or distributing heat-conducting fluids in a motor vehicle, with a part-spherical rotary valve body ( 2 ), wherein the rotary valve body ( 2 ) on its lateral surface ( 3 ) at least one passage opening ( 4 ) to regulate the fluid supply from connected lines, and with a rotary valve body ( 2 ) movably supporting housing ( 5 ), characterized in that the rotary valve body ( 2 ) from the passage opening ( 4 ) outgoing a flow-carrying pipe part ( 6 ) owns. Rotary valve ( 1 ) according to claim 1, characterized in that the housing ( 5 ) a fluid supply opening ( 8th ) owns. Rotary valve ( 1 ) according to claim 2, characterized in that the tubular part ( 6 ) to the fluid supply port ( 8th ) and / or stored there. Rotary valve ( 1 ) according to claim 1, 2 or 3, characterized in that the pipe part ( 6 ) is formed as Rohrbiegungsteil with uniform curvature. Rotary valve ( 1 ) according to one of claims 1 to 4, characterized in that between the housing ( 5 ) and the rotary valve body ( 2 ) in the region of the passage opening ( 4 ) a primary seal ( 9 . 10 ) is available. Rotary valve ( 1 ) according to one of claims 2 to 5, characterized in that at one of the fluid supply opening ( 8th ) facing the end of the tubular part ( 6 ) such a geometry is present that a flow constriction is forced. Rotary valve ( 1 ) according to claim 6, characterized in that the geometry in the manner of a nozzle ( 16 ). Rotary valve ( 1 ) according to one of claims 1 to 7, characterized in that the tubular part ( 6 ) is formed as a Rohrbiegungsteil with irregular curvature. Rotary valve ( 1 ) according to one of claims 2 to 8, characterized in that the fluid supply opening ( 8th ) in the housing ( 5 ) is arranged off-center. Thermal management module with a rotary valve ( 1 ) according to any one of the preceding claims.

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