DE102021112436B4 - Coolant controller of a cooling system of a vehicle drive - Google Patents

Abstract

Coolant controller (1, 1') of a cooling system of a vehicle drive, having: - a housing (2) with a coolant space (4) and coolant connections (P2 to P5), - a rotary slide (5, 5') arranged in the coolant space (4), which has one or more coolant passages (15, 16) passing through it, and connection seals (12) which are arranged in the coolant space (4) between some or all of the coolant connections (P2 to P5) on the one hand and the rotary slide (5, 5') on the other and are partially or all in sealing sliding contact with an axial end face (13, 13') of the rotary slide (5, 5'), characterized in that the rotary slide (5, 5') has a hollow space (17, 17') formed coolant channel, the channel ends (18, 19) of which pass through an axial end face (13, 13') at a circumferential distance and which is open towards the coolant space (4) only at the channel ends (18, 19), wherein:- in a rotary position the rotary valve (5, 5') d The channel ends (18, 19) open inside two of the connection seals (12) and the associated coolant connections (P2, P4) are connected to one another via the coolant channel, while a third of the connection seals (12) is located within the circumferential spacing of the channel ends (18 , 19) is in sealing contact with one axial end face (13) and interrupts the connection of the associated coolant connection (P3) to the coolant space (4), and in a further rotational position of the rotary slide (5, 5') one of the channel ends (19 ) inside the third connection seal (12).

Description

• - ein Gehäuse mit einem Kühlmittelraum und Kühlmittelanschlüssen,
• - einen im Kühlmittelraum angeordneten Drehschieber, der von einem oder mehreren Kühlmitteldurchlässen drehaxial durchsetzt ist,
• - und Anschlussdichtungen, die im Kühlmittelraum zwischen einigen oder sämtlichen Kühlmittelanschlüssen einerseits und dem Drehschieber andererseits angeordnet sind und sich teilweise oder sämtlich mit einer axialen Stirnfläche des Drehschiebers in dichtendem Gleitkontakt befinden.

The invention relates to a coolant regulator of a cooling system of a vehicle drive, comprising:

• - a housing with a coolant space and coolant connections,
• - a rotary slide arranged in the coolant space, through which one or more coolant passages pass in an axial direction,
• - and connection seals, which are arranged in the coolant space between some or all coolant connections on the one hand and the rotary slide on the other hand and are partly or all in sealing sliding contact with an axial end face of the rotary slide.

Such a coolant regulator is, inter alia, from DE 10 2015 213 857 A1 the DE 10 2018 111 139 A1 and the WO 2003/006 856 A1 known. The rotary valve is in each case designed as a control disk, ie with the basic shape of a cylinder of low height.

Other coolant regulators are off DE 20 2016 004 427 U1 and U.S. 5,950,576A known.

The object of the present invention is to improve the design of a coolant regulator of the type mentioned at the outset.

• - in einer Drehposition des Drehschiebers die Kanalenden im Innern von zwei der Anschlussdichtungen münden und die zugehörigen Kühlmittelanschlüsse über den Kühlmittelkanal miteinander verbunden sind, während sich eine dritte der Anschlussdichtungen innerhalb des umfänglichen Abstands der Kanalenden im Dichtkontakt mit der einen axialen Stirnfläche befindet und die Verbindung des zugehörigen Kühlmittelanschlusses mit dem Kühlmittelraum unterbricht,
• - und in einer weiteren Drehposition des Drehschiebers eines der Kanalenden im Innern der dritten Anschlussdichtung mündet.

This object is achieved in that the rotary slide has a coolant channel designed as a cavity, the channel ends of which pass through an axial end face at a circumferential distance and which is only open at the channel ends towards the coolant space, with:

• - in a rotary position of the rotary slide, the channel ends open inside two of the connection seals and the associated coolant connections are connected to one another via the coolant channel, while a third of the connection seals is in sealing contact with one axial end face within the circumferential distance of the channel ends and the connection of the associated coolant connection with the coolant space interrupts,
• - And in a further rotational position of the rotary valve, one of the channel ends opens inside the third connection seal.

The coolant channel running inside the rotary valve makes it possible to implement the desired flow rate identification or flow logic of the coolant controller, i.e. the rotational position-dependent connections of the coolant connections with the associated flow cross sections, in a structurally simple manner.

Advantageous configurations of the invention are the subject matter of the dependent patent claims.

• 1 einen ersten Kühlmittelregler im Längsschnitt;
• 2 den Drehschieber des ersten Kühlmittelreglers als Einzelteil in perspektivischer Vorderansicht;
• 3 den Drehschieber gemäß 2 in perspektivischer Rückansicht;
• 4 die Durchflusslogik des ersten Kühlmittelreglers;
• 5 einen zweiten Kühlmittelregler im längsgeschnittenen Ausschnitt;
• 6 den Drehschieber des zweiten Kühlmittelreglers als Einzelteil in perspektivischer Vorderansicht;
• 7 den Drehschieber gemäß 6 in perspektivischer Rückansicht.

Preferred embodiments of coolant regulators according to the invention are explained in more detail below with reference to the figures, which show the details of the coolant regulators that are essential for understanding the invention. Unless otherwise mentioned, identical or functionally identical components or features are provided with the same reference numbers. Show it:

• 1 a first coolant regulator in longitudinal section;
• 2 the rotary valve of the first coolant regulator as an individual part in a perspective front view;
• 3 according to the rotary valve 2 in perspective rear view;
• 4 the flow logic of the first coolant controller;
• 5 a second coolant regulator in the longitudinal section;
• 6 the rotary valve of the second coolant regulator as an individual part in a perspective front view;
• 7 according to the rotary valve 6 in perspective rear view.

1 shows in connection with the 2 and 3 the first exemplary embodiment of a coolant controller 1 according to the invention of a cooling circuit, comprising several partial circuits, of a vehicle with a purely battery-electric drive, or BEV for short. The coolant regulator 1 has a housing 2 with a drive chamber 3 and a coolant chamber 4 separated therefrom, in which a rotary slide valve 5 is arranged. The rotation of the rotary valve 5 about its axis of rotation 6 takes place steplessly via a drive shaft 7 which, as part of the rotary valve 5 , leads out of the coolant space 4 in a sealed manner and is connected to a rotary drive 8 arranged in the drive space 3 . The rotary drive 8, which is known per se, comprises an electric motor (not visible in the figure) and a spur gear 9 that translates its revolutions. The mutual separation of the drive space 3 and the coolant space 4 takes place via shaft sealing rings 10 and 11.

The housing 2 is in accordance with 4 provided with coolant connections P1 to P5 in the form of standardized hose connectors, of which the sectional view according to 1 only the coolant connections P2 to P4 are visible. The coolant reg ler 1 has four annular connection seals 12, which are each arranged in the coolant space 4 between the associated coolant connections P2 to P5 in their extension on the one hand and the rotary slide 5 on the other hand and which are all in sealing sliding contact with an axial end face 13 of the rotary slide 5. The connection seals 12 are in the direction of the end face 13 spring-loaded seal packs with a circular flow cross section. The end face 14 of the rotary slide 5 axially opposite the end face 13 is free of connecting seals. The (additional) coolant connection P1 is permanently connected to the coolant space 4 due to the lack of sealing contact. The coolant flows around the rotary slide valve 5 on its outer circumference and in the present exemplary embodiment over its entire outer circumference and consequently the pressure is balanced axially.

As in the 2 and 3 clearly recognizable, the rotary valve 5 is designed as a regulating wheel through which two essentially kidney-shaped coolant passages 15 and 16 pass in the axial direction. The rotary slide 5 also has a coolant channel designed as a cavity 17, the channel ends 18 and 19 of which pass through the end face 13 at a circumferential distance and have a circular flow cross section and which is open towards the coolant chamber 4 only at the channel ends 18, 19. The rotary valve 5 is constructed in two parts with a disc part 20 and a cover part 21 joined thereto and delimiting the cavity 17 . The disk part 20 and the cover part 21 are plastic parts that are ultrasonically welded together.

In the first exemplary embodiment, the end face 13 contains a (flat) annular surface through which the coolant passages 15, 16 and the channel ends 18, 19 pass. The cavity 17 has approximately the shape of a half-torus piece extending over an angle of less than 180°, with the corresponding outer contour of the cover part 21 bulging on the end face 14 .

The 4a until 4c show the flow logic of the coolant regulator 1 using three rotational positions of the rotary valve 5. The coolant leaves the coolant regulator 1 at the coolant ports P1 to P3 and enters the coolant regulator 1 at the coolant ports P4 and P5.

4a : In a first rotational position of the rotary slide 5, the channel ends 18, 19 open inside two of the four connection seals 12, and the associated coolant connections P2, P4 are connected to one another via the coolant channel, i.e. the cavity 17, while a third of the connection seals 12 is inside of the circumferential spacing of the channel ends 18, 19 is in sealing contact with one axial end face 13 and interrupts the connection of the associated coolant connection P3 to the coolant space 4. The flow connections P5 -> P1 via coolant passage 15 and P4 -> P2 via cavity 17 are established according to the arrows drawn.

4b : In a second rotational position of the (counterclockwise) rotary slide 5, the two connection seals 12 of the coolant connections P2 and P3 are located circumferentially between the channel ends 18, 19, which are open towards the coolant space 4, and in the flow-interrupting sealing contact with the end face 13. According to the drawing The flow connections P4 -> P1 via the coolant passage 16 and P5 -> P1 via the coolant passage 15 are now established with the arrows.

4c : In a further, third rotational position of the rotary slide 5 (further rotated counterclockwise), the channel end 19 opens inside the (third) connection seal 12 of the coolant connection P3, while the channel end 18 is open to the coolant chamber 4. The connection seal 12 of the second coolant connection P2 is located circumferentially between the channel ends 18, 19 in flow-interrupting sealing contact with the end face 13. According to the drawn arrows, the flow connections are now P5 -> P1 via coolant passage 15 and P5 -> P3 via coolant passage 15 and cavity 17 and P4 -> P1 via coolant passage 16 and P4 -> P3 via coolant passage 16 and cavity 17 produced. The effective flow cross section of the coolant connection P5 is greatly reduced in this rotational position as a result of the only slight overlap of the (second) connection seal 12 with the coolant passage 15 .

The 5 until 7 show the second exemplary embodiment of a coolant regulator 1' according to the invention, only the essential differences from the coolant regulator 1 being explained below.

The rotary slide 5' is also a regulating disk, but the axial end face 13' contains a lateral surface of a spherical layer through which the coolant passages 15, 16 and the channel ends 18, 19 pass, and in the present exemplary embodiment is the lateral surface of a spherical segment. The coolant channel formed by the cavity 17' has approximately the shape of a halved segment of a sphere. The central axes 22 of the connecting seals 12, which are spatially inclined relative to one another, intersect at the center of the sphere in accordance with the sphere geometry.

Reference List

1

coolant regulator

2

Housing

3

drive room

4

coolant space

5

rotary vane

6

axis of rotation

7

drive shaft

8th

rotary drive

9

spur gear

10

shaft seal

11

shaft seal

12

connection seal

13

face

14

face

15

coolant passage

16

coolant passage

17

cavity

18

channel end

19

channel end

20

disk part

21

cover part

22

central axis

P1 to P5

coolant connections

Claims (10)

Coolant regulator (1, 1') of a cooling system of a vehicle drive, having: - a housing (2) with a coolant space (4) and coolant connections (P2 to P5), - a rotary slide (5, 5') arranged in the coolant space (4), which has one or more coolant passages (15, 16) passing through it, - and connection seals (12) which are arranged in the coolant space (4) between some or all of the coolant connections (P2 to P5) on the one hand and the rotary slide (5, 5') on the other and are partially or all in sealing sliding contact with an axial end face (13, 13') of the rotary slide (5, 5'), characterized in that the rotary slide (5, 5') has a hollow space (17, 17') formed coolant channel, the channel ends (18, 19) of which pass through an axial end face (13, 13') at a circumferential distance and which is open towards the coolant space (4) only at the channel ends (18, 19), wherein: - in a rotational position of the rotary valve (5, 5') the channel ends (18, 19) open inside two of the connection seals (12) and the associated coolant connections (P2, P4) are connected to one another via the coolant channel, while a third of the connection seals (12) is located within the circumferential distance of the duct ends (18, 19) are in sealing contact with one axial end face (13) and interrupts the connection of the associated coolant connection (P3) to the coolant space (4), - and in a further rotational position of the rotary slide (5, 5') one of the Channel ends (19) inside the third connection seal (12) opens. Coolant regulator (1, 1') after claim 1 , characterized in that the rotary valve (5, 5') is a regulating wheel. Coolant regulator (1) after claim 2 , characterized in that the regulating wheel is in two parts with a wheel part (20) and a cover part (21) joined thereto and delimiting the cavity (17, 17'). Coolant regulator (1, 1') after claim 3 , characterized in that the disk part (20) and the cover part (21) are ultrasonically welded plastic parts. Coolant regulator (1, 1') according to one of the preceding claims, characterized in that the rotary slide (5, 5') is in sealing contact with connection seals (12) only on the one axial end face (13, 13'). Coolant regulator (1, 1') after claim 5 , characterized in that the rotary slide (5, 5') has exactly two coolant passages (15, 16) passing through it and one axial end face (13, 13') is in sealing contact with exactly four connection seals (12). Coolant regulator (1, 1') according to one of the preceding claims, characterized in that the rotary slide (5, 5') has the coolant flowing around its outer circumference. Coolant regulator (1) according to one of the preceding claims, characterized in that the housing (2) has a further coolant connection (P1) which is permanently connected to the coolant space (4). Coolant regulator (1) according to one of Claims 1 until 8th , characterized in that the one axial end face (13) contains a circular ring surface through which the coolant passages (15, 16) and the channel ends (18, 19) pass. Coolant regulator (1 ') according to one of Claims 1 until 8th , characterized in that one axial end face (13') contains a lateral surface of a spherical layer or a spherical segment through which the coolant passages (15, 16) and the channel ends (18, 19) pass.

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