A six-way water valve for a thermal management system for a vehicle

Abstract

The present invention discloses a six-way water valve for a vehicle thermal management system. It includes a valve body, a cylindrical valve core, a valve core shaft, a sealing gasket, a valve cover and an actuator. The valve body is connected to two water inlet pipes and four water outlet pipes. The two water inlet pipes are coaxially arranged, and the four water outlet pipes are symmetrically distributed on both sides of the axis of the water inlet pipe. The cylindrical valve core is provided with a water outlet and two arc-shaped flow channels. The actuator drives the valve core shaft to drive the cylindrical valve core to rotate and control the connection and disconnection between the water outlet and the arc-shaped flow channel and the water inlet pipe and the water outlet pipe. The present invention has a reasonable design of the valve body, cylindrical valve core, sealing gasket structure and the cooperation between them, which reduces the valve body action torque while ensuring the sealing performance, thereby reducing the wear of the sealing friction pair.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile thermal management systems, and in particular relates to a six-way water valve for a vehicle thermal management system. Background Art

[0002] The existing automotive thermal management system valve devices mostly use several small-channel (two, three, four) valve devices to form a cooling circuit, which has high parts cost, complex control, and scattered layout. In recent years, multi-channel valves with higher integration have emerged to replace the above valves. Among them, cylindrical valve core products are more mature, but their valve bodies have disadvantages such as large load torque (>2N·m) and difficult control of internal leakage sealing performance. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a six-way water valve for a vehicle thermal management system with smaller torque, simpler control and better internal leakage sealing performance.

[0004] The technical solution adopted by the present invention is: a sealing gasket for a valve, comprising a valve body, a cylindrical valve core, a valve core shaft, a sealing gasket, a valve cover and an actuator, wherein the valve cover is installed on the top of the valve body, the cylindrical valve core is installed inside the valve body, the outer side of the sealing gasket is sealed with the inner wall of the valve body, the inner side of the sealing gasket is sealed with the outer wall of the cylindrical valve core, one end of the valve core shaft is fixed to the top of the cylindrical valve core, and the other end passes through the valve cover and is fixedly connected to the actuator, the sealing gasket comprises a static sealing layer and a dynamic sealing layer, the dynamic sealing layer is attached to the inner side of the static sealing layer, A plurality of first convex ribs are provided at intervals on the outer surface of the static sealing layer at a position in contact with the inner wall of the valve body, and a plurality of second convex ribs are provided at intervals on the inner wall of the dynamic sealing layer at a position in contact with the outer wall of the valve core; two water inlet pipes and four water outlet pipes are connected to the valve body, the two water inlet pipes are coaxially arranged, and the four water outlet pipes are symmetrically distributed on both sides of the axis of the water inlet pipe; a water outlet and two arc-shaped flow channels are provided on the cylindrical valve core, and the actuator drives the valve core shaft to drive the cylindrical valve core to rotate to control the connection and disconnection between the water outlet and the arc-shaped flow channel and the water inlet pipe and the water outlet pipe.

[0005] Furthermore, the two water inlet pipes are respectively the first water inlet pipe and the second water inlet pipe, the angles between the axes of the two adjacent water outlet pipes and between the water outlet pipe and the axis of the adjacent second water inlet pipe are the same, and the distance between the two ends of the arc flow channel is the same as the distance between the farthest two points on the pipe openings of the two adjacent water outlet pipes.

[0006] Furthermore, limit blocks are respectively provided on both sides of the first water inlet pipe opening on the inner wall of the valve body, and the limit blocks cooperate with both sides of the notch on the sealing gasket.

[0007] Furthermore, the sealing gasket is a circular ring structure, and a notch penetrating up and down is provided on the sealing gasket in the axial direction at a position corresponding to the pipe opening of the first water inlet pipe.

[0008] Furthermore, a through hole is opened on the sealing gasket at a position corresponding to the outlet pipe orifice and the second inlet pipe orifice, the first convex rib and the second convex rib are distributed around the through hole, the distance between adjacent through holes is d, and a transition portion is provided on the side of the through hole located at the edge close to the notch, the area of ​​the transition portion is the same as the area of ​​the through hole, the distance between the transition portion and the edge through hole is d, and the first convex rib and the second convex rib are distributed around the transition portion.

[0009] Furthermore, the thickness of the dynamic sealing layer at a position other than the second convex rib is 0.3-0.5 mm.

[0010] Furthermore, a groove is provided on the outer side surface of the static sealing layer at a position other than the first convex rib.

[0011] Furthermore, the static sealing layer is made of EPDM.

[0012] Furthermore, the material of the dynamic sealing layer is PTFE.

[0013] Furthermore, a first fan-shaped limit boss is provided on the end face of the cylindrical valve core away from the valve core axis, and a second limit boss is provided on the inner wall of the valve body cooperating with one end of the cylindrical valve core. The total stroke angle of the cylindrical valve core is controlled by the cooperation between the first limit boss and the second limit boss.

[0014] The beneficial effects of the present invention are:

[0015] The dynamic sealing layer and the static sealing layer of the sealing gasket of the present invention are both arranged in a manner of multiple ribs at intervals. When they are in contact and sealed with the valve body and the valve core, a double-line or more-line sealing structure is formed. Not only is the structure simple, but the internal leakage sealing performance is better and the valve body torque is smaller. At the same time, the inner and outer layers of the sealing gasket are bonded together by compression molding. The dynamic sealing layer uses a material with a low friction coefficient and cooperates with the valve core to move relative to each other to form a dynamic seal, which has good wear resistance.

[0016] The internal leakage performance of the present invention is composed of a valve body, a valve core and a sealing gasket structure with double line seals. The arrangement of double ribs inside and outside the sealing gasket reduces the valve body action torque while ensuring the sealing performance, thereby reducing the wear of the sealing friction pair (dynamic sealing layer). The valve body load torque is only about 1 / 3 of the existing sealing structure, which can improve the product life and reduce noise. The valve body adopts an integrated design to reduce the assembly cost of the pipe mouth and the valve body. The double arc flow channel on the cylindrical valve core cooperates with the valve body water pipe, which has a simple structure, convenient operation and easy implementation. The present invention has a reasonable design of the valve body, cylindrical valve core, sealing gasket structure and mutual cooperation. The valve device is more integrated, which can reduce the system pipeline layout, reduce the actuator from multiple to one, and simplify the control from complex, and greatly reduce the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the six-way water valve of the present invention.

[0018] Figure 2 It is a schematic diagram of the explosion of the six-way water valve of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the valve body of the six-way water valve of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the cylindrical valve core of the six-way water valve of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the sealing gasket of the six-way water valve of the present invention.

[0022] Figure 6 It is a cross-sectional view of the position of the convex rib on the sealing gasket of the six-way water valve of the present invention.

[0023] Figure 7 It is a schematic diagram of the static sealing layer of the sealing gasket of the present invention.

[0024] Figure 8 It is a schematic diagram of the dynamic sealing layer of the sealing gasket of the present invention.

[0025] Fig. 9 This is a schematic diagram of the six-way water valve of the present invention in mode 1.

[0026] Fig.10 This is a schematic diagram of the six-way water valve of the present invention in mode 2.

[0027] Fig.11 This is a schematic diagram of the six-way water valve of the present invention in mode 3.

[0028] Fig.12 This is a schematic diagram of the six-way water valve of the present invention in mode 4.

[0029] In the figure: 1-valve body; 1.1-second limiting boss; 1.2-pin hole; 1.3-limit block; 2-cylindrical valve core; 2.1-first limiting boss; 2.2-pin shaft; 3-sealing pad; 4-valve cover; 5-actuator; 6-water inlet pipe; 6.1-first water inlet pipe; 6.2-second water inlet pipe; 7-water outlet pipe; 8-water outlet; 9-arc flow channel; 10-first convex rib; 11-second convex rib; 12-notch; 13-through hole; 14-transition part; 15-groove; 16-X-ring; 17-O-ring; 7.1-first water outlet pipe; 7.2-second water outlet pipe; 7.3-third water outlet pipe; 7.4-fourth water outlet pipe; 18-valve core shaft; 19-static sealing layer; 20-dynamic sealing layer; 21-axis; 22-axis. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1-8 As shown, the present invention provides a six-way water valve for a vehicle thermal management system, comprising a valve body 1, a cylindrical valve core 2, a valve core shaft 18, a sealing gasket 3, a valve cover 4 and an actuator 5, wherein the valve cover 4 is mounted on the top of the valve body 1, the cylindrical valve core 2 is mounted inside the valve body 1, the outer side surface of the sealing gasket 3 is sealed with the inner wall of the valve body 1, and the inner side surface of the sealing gasket 3 is sealed with the outer wall of the cylindrical valve core 2, one end of the valve core shaft 18 is fixed to the top of the cylindrical valve core 2, and the other end passes through the valve cover 4 and is fixedly connected to the actuator 5, two water inlet pipes 6 and four water outlet pipes 7 are connected to the valve body 1, the two water inlet pipes 6 are coaxially arranged and the axes of the two water inlet pipes 6 intersect with the axis of the valve body, and the four water outlet pipes 7 are symmetrically distributed on both sides of the axis of the water inlet pipe 6, a water outlet 8 and two arc-shaped flow channels 9 are provided on the cylindrical valve core 2, and the actuator 5 drives the valve core shaft 18 to drive the cylindrical valve core 2 to rotate to control the water outlet 8 and the arc-shaped flow channel 9 to contact the water inlet pipe 6 And the on-off between the water outlet pipe 7.

[0032] In the above scheme, the two water inlet pipes 6 are respectively the first water inlet pipe 6.1 and the second water inlet pipe 6.2, the four water outlet pipes 7 are respectively the first water outlet pipe 7.1, the second water outlet pipe 7.2, the third water outlet pipe 7.3, and the fourth water outlet pipe 7.4, the angles between the axes 21 of two adjacent water outlet pipes (such as the first water outlet pipe 7.1 and the second water outlet pipe 7.2, and the third water outlet pipe 7.3 and the fourth water outlet pipe 7.4), the angles between the axis 21 of the second water outlet pipe 7.2 and the axis 22 of the adjacent second water inlet pipe 6.2, and the angles between the axis 21 of the third water outlet pipe 7.2 and the axis 22 of the adjacent second water inlet pipe 6.2 are all the same, the distance between the two ends of the arc flow channel 9 located on the same cross section (and the cross section parallel to the radial direction of the cylindrical valve core) is the same as the distance between the two farthest points on the pipe openings of the two adjacent water outlet pipes 7, so that when the arc flow channel 9 is rotated to a certain angle, it just covers the pipe opening of one water inlet pipe 6 and the pipe opening of one water outlet pipe 7.

[0033] In the above solution, the inner wall of the valve body 1 is provided with limit blocks 1.3 on both sides of the first water inlet pipe 6.1, and the limit blocks 1.3 are in contact with both sides of the notch 12 on the sealing gasket 3. By arranging the limit blocks 1.3, it can be ensured that the sealing gasket 3 does not change position with the rotation of the cylindrical valve core 2 during the rotation of the cylindrical valve core 2.

[0034] In the above scheme, a fan-shaped first limiting boss 2.1 and a pin 2.2 are provided on the end face of the cylindrical valve core 2 away from the valve core shaft 18, and a second limiting boss 1.1 and a pin hole 1.2 are provided on the inner wall of the valve body 1 that cooperates with one end of the cylindrical valve core 2. The total stroke angle of the cylindrical valve core 2 is controlled by the cooperation of the first limiting boss 2.1 and the second limiting boss 1.1, and the eccentric displacement of the cylindrical valve core 2 during rotation can be avoided by the cooperation and positioning of the pin 1.2 and the pin 2.2. That is, at the starting position, one side of the first limiting boss 2.1 fits one side of the second limiting boss 1.1, and when the cylindrical valve core 1 rotates to the end position, the other side of the first limiting boss 2.1 fits the other side of the second limiting boss 1.1. By reasonably designing the angle between the two sides of the two limiting bosses, the total rotation angle of the cylindrical valve core 2 can be controlled.

[0035] In the above scheme, the sealing gasket 3 includes a static sealing layer 19 and a dynamic sealing layer 20, wherein the dynamic sealing layer 20 is attached to the inner side of the static sealing layer 19, and a plurality of first convex ribs 10 are provided at intervals on the outer side of the static sealing layer 19 at a position for contacting the inner wall of the valve body 1, preferably two or three, and a plurality of second convex ribs 11 are provided at intervals on the inner wall of the dynamic sealing layer 20 at a position for contacting the outer wall of the cylindrical valve core 2, preferably two or three. The static sealing layer 19 contacts the inner wall of the valve body 1 through two first convex ribs 10 to form a multiple line sealing structure, and the dynamic sealing layer 20 contacts the outer wall of the cylindrical valve core 2 through two second convex ribs 11 to form a multiple line sealing structure. The valve body 1 and the cylindrical valve core 2 are provided with a double line sealing structure of inner and outer layers, which effectively improves the reliability of the seal.

[0036] In the above scheme, the sealing gasket 3 is provided with a notch 12 which runs through from top to bottom at a position corresponding to the pipe opening of the first water inlet pipe 6.1. The notch 12 can ensure that no matter what angle the cylindrical valve core 2 is rotated to, the first water inlet pipe 6.1 can be connected to the internal space of the cylindrical valve core, and the sealing gasket 3 A through hole 13 is provided at a position corresponding to the outlet pipe 7 and the second water inlet pipe 6.2. The first convex rib 10 and the second convex rib 11 are distributed around the through hole 13. The adjacent water pipes are separated by the first convex rib 10 and the second convex rib 11. The distance between adjacent through holes 13 is d. A transition portion 14 is provided on the side of the through hole located at the edge close to the notch. The area of ​​the transition portion 14 is the same as the area of ​​the through hole. The distance between the transition portion 14 and the through hole at the edge is d. The first convex rib 10 and the second convex rib 11 are distributed around the transition portion 14. The provision of the transition portion 14 and the convex ribs around the transition portion can prevent the first water outlet pipe 6.1 from being connected to the inside of the cylindrical valve core 2 through the arc flow channel 9 or the fourth water outlet pipe 7.4 from being connected to the inside of the cylindrical valve core 1 through the arc flow channel when the cylindrical valve core 2 is at 0 degrees or the maximum rotation angle, thereby further improving the sealing performance of the entire valve. The transition portion 14 can be a through hole or a plane.

[0037] The side surface of the static sealing layer 19 in contact with the dynamic sealing layer 20 can be a smooth cambered surface or an irregular cambered surface with concave and convex parts. When it is a smooth cambered surface, the inner side of the static sealing layer 19 and the outer side of the dynamic sealing layer 20 are both cambered surfaces, such as circular arc surfaces; when it is an irregular cambered surface, the inner side of the static sealing layer 19 corresponding to the first convex rib 10 can have a convex triangular portion, and the outer side of the dynamic sealing layer 20 is a concave portion that matches the triangular portion, and the inner side forms the second convex rib 11. This embodiment shows such a structure, as shown in FIG. Figure 6 shown.

[0038] In the above scheme, the first rib 10 is a circular protrusion structure, which forms a seal with the inner wall of the valve body 1, and the sealing method is a static seal. The circular protrusion can improve the support and avoid permanent deformation to one side caused by the endurance process, which affects the sealing performance; the second rib 11 is a V-shaped structure, which forms a seal with the outer wall of the cylindrical valve core 2, and the sealing method is a rotary dynamic seal. The V-shaped structure provides a higher sealing pressure ratio under the same compression amount than the circular structure, and the sealing performance is better. At the same time, the top of the V-shaped structure has a smooth transition instead of a sharp corner, which can not only increase the sealing performance but also improve the support of the sealing rib.

[0039] In the above scheme, when both the static sealing layer and the dynamic sealing layer are smooth cambered surfaces, the thickness of the dynamic sealing layer at the second convex rib position is greater than the thickness at the position not at the second convex rib; when the side surface where the static sealing layer and the dynamic sealing layer contact is an irregular cambered surface with concave and convex matching, the thickness of each position on the dynamic sealing layer is the same. Therefore, regardless of the structure of the dynamic sealing layer, the thickness at the position not at the second convex rib is limited to 0.2-0.6mm, preferably 0.3mm, 0.4mm, 0.5mm. The appropriate thickness can reduce the cost while ensuring the sealing performance.

[0040] In the above scheme, grooves 15 are provided at multiple positions on the outer surface of the static sealing layer 19 other than the first rib 10. The grooves 15 are designed to reduce the filling rate of the sealing gasket between the valve body and the cylindrical valve core to prevent the risk of excessive torque of the valve body at high temperature.

[0041] In the above scheme, the static sealing layer 19 is made of EPDM, and the dynamic sealing layer 20 is made of PTFE, which are bonded together by compression molding. The PTFE material has a low friction coefficient, forms a dynamic seal with the relative movement of the valve core, and has good wear resistance.

[0042] like Figure 9-12 As shown, the conduction modes between different water pipes are formed when the cylindrical valve core 2 of the present invention is rotated to different angles.

[0043] Fig. 9Mode 1 is a schematic diagram of the position of the cylindrical valve core 2 when it is at 0 degrees. In this mode, the first water inlet pipe 6.1 is connected to the first water outlet pipe 7.1 through the water outlet 8 on the cylindrical valve core, and the coolant enters the inner cavity of the valve body through the first water inlet pipe 6.1 and then flows out through the first water outlet pipe 7.1; the second water inlet pipe 6.2 is connected to the second water outlet pipe 7.2 through one of the arc-shaped flow channels 9, and the third water outlet pipe 7.3 and the fourth water outlet pipe 7.4 are blocked.

[0044] Fig.10 Mode 2 is a schematic diagram of the position when the cylindrical valve core 2 rotates 40 degrees. In this mode, the first water inlet pipe 6.1 is connected to the second water outlet pipe 7.2 through the water outlet 8 on the cylindrical valve core, and the coolant enters the inner cavity of the valve body through the first water inlet pipe 6.1 and then flows out through the second water outlet pipe 7.2; the second water inlet pipe 6.2 is connected to the third water outlet pipe 7.3 through one of the arc-shaped flow channels 9, and the first water outlet pipe 7.1 and the fourth water outlet pipe 7.4 are blocked.

[0045] Fig.11 Mode 3 is a schematic diagram of the position when the cylindrical valve core 2 rotates 120 degrees. In this mode, the first water inlet pipe 6.1 is connected to the third water outlet pipe 7.3 through the water outlet 8 on the cylindrical valve core, and the coolant enters the inner cavity of the valve body through the first water inlet pipe 6.1 and then flows out through the third water outlet pipe 7.3; the second water inlet pipe 6.2 is connected to the second water outlet pipe 7.2 through one of the arc-shaped flow channels 9, and the first water outlet pipe 7.1 and the fourth water outlet pipe 7.4 are blocked.

[0046] Fig.12 Mode 4 is a schematic diagram of the position when the cylindrical valve core 2 rotates 160 degrees. In this mode, the first water inlet pipe 6.1 is connected to the fourth water outlet pipe 7.4 through the water outlet 8 on the cylindrical valve core, and the coolant enters the valve body cavity through the first water inlet pipe 6.1 and then flows out through the fourth water outlet pipe 7.4; the second water inlet pipe 6.2 is connected to the third water outlet pipe 7.3 through one of the arc-shaped flow channels 9, and the first water outlet pipe 7.1 and the second water outlet pipe 7.2 are blocked.

[0047] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field.

Claims

1. A six-way water valve for a vehicle thermal management system, comprising a valve body (1), a cylindrical valve core (2), a valve core shaft (18), a sealing gasket (3), a valve cover (4) and an actuator (5), wherein the valve cover (4) is mounted on the top of the valve body (1), the cylindrical valve core (2) is mounted inside the valve body (1), the outer side surface of the sealing gasket (3) is in sealing cooperation with the inner wall of the valve body (1), the inner side surface of the sealing gasket (3) is in sealing cooperation with the outer wall of the cylindrical valve core (2), one end of the valve core shaft is fixed to the top of the cylindrical valve core (2), and the other end passes through the valve cover (4) and is fixedly connected to the actuator, characterized in that: The sealing gasket (3) comprises a static sealing layer (19) and a dynamic sealing layer (20), the dynamic sealing layer being attached to the inner side of the static sealing layer, a plurality of first convex ribs (10) being arranged at intervals on the outer side of the static sealing layer (19) at a position in contact with the inner wall of the valve body, and a plurality of second convex ribs (11) being arranged at intervals on the inner wall of the dynamic sealing layer (20) at a position in contact with the outer wall of the valve core; two water inlet pipes (6) and four water outlet pipes (7) are connected to the valve body (1), the two water inlet pipes (6) are coaxially arranged, and the four water outlet pipes (7) are symmetrically distributed on both sides of the axis of the water inlet pipe (6); a water outlet (8) and two arc-shaped flow channels (9) are arranged on the cylindrical valve core (2), and the actuator (5) drives the valve core shaft to drive the cylindrical valve core (2) to rotate to control the connection and disconnection between the water outlet and the arc-shaped flow channel and the water inlet pipe and the water outlet pipe; The two water inlet pipes (6) are respectively a first water inlet pipe (6.1) and a second water inlet pipe (6.2); the inner wall of the valve body (1) is provided with limit blocks (1.3) on both sides of the pipe opening of the first water inlet pipe (6.1); the sealing gasket (3) is a circular ring structure; a notch (12) penetrating vertically is provided on the sealing gasket (3) at a position corresponding to the pipe opening of the first water inlet pipe (6.1) along the axial direction; the limit blocks (1.3) cooperate with both sides of the notch (12); A through hole (13) is formed on the sealing gasket (3) at a position corresponding to the outlet pipe opening and the second inlet pipe opening, and the first convex rib (10) and the second convex rib (11) are distributed around the through hole (13).

2. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: The angles between the axes of two adjacent water outlet pipes (7) and between the axes of the water outlet pipe (7) and the adjacent second water inlet pipe (6.2) are the same, and the distance between the two ends of the arc-shaped flow channel (9) is the same as the distance between the two farthest points on the pipe openings of the two adjacent water outlet pipes (7).

3. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: The distance between adjacent via holes is d, a transition portion (14) is provided on the side of the via hole located at the edge close to the notch, the area of ​​the transition portion is the same as the area of ​​the via hole, the distance between the transition portion and the edge via hole is d, and a first convex rib (10) and a second convex rib (11) are distributed around the transition portion (14).

4. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: The thickness of the dynamic sealing layer (20) at a position other than the second convex rib is 0.3-0.5 mm.

5. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: A groove (15) is provided on the outer side surface of the static sealing layer (19) at a position other than the first convex rib.

6. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: The material of the static sealing layer (19) is EPDM.

7. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: The material of the dynamic sealing layer (20) is PTFE.

8. The six-way water valve for a vehicle thermal management system according to claim 1, characterized in that: A fan-shaped first limiting boss (2.1) is provided on the end surface of the cylindrical valve core (2) away from the valve core axis, and a second limiting boss (1.1) is provided on the inner wall of the valve body (1) that cooperates with one end of the cylindrical valve core. The total stroke angle of the cylindrical valve core is controlled by the cooperation of the first limiting boss (2.1) and the second limiting boss (1.1).

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