KR102170927B1 - Multi valve device for vehicle - Google Patents

Abstract

It relates to a multi-valve device for a vehicle that controls the flow of fluid in multiple directions. The multi-valve device includes a housing, a valve, a sealing member, and an elastic member. The valve housing has a plurality of ports through which fluid is introduced or discharged. The valve is rotatably installed in the valve housing to selectively open and close at least one of the plurality of ports. The sealing member has a flow path through which a fluid flows, and is disposed between the port and the valve to seal at least one port. The elastic member is disposed on one side of the sealing member to elastically press one surface of the sealing member toward the valve. In addition, the sealing member includes a lip seal whose outer circumferential surface is spaced apart from the valve housing to form a gap, and a lip seal having a part of the inner circumferential surface in close contact with the port, and a retainer disposed inside the lip seal to support the lip seal, and fluid flows into the gap to form a gap. And pressing the sealing member together.

Description

Vehicle multi-valve device{MULTI VALVE DEVICE FOR VEHICLE}

The present invention relates to a multi-valve device for a vehicle that controls the flow of fluid in multiple directions, and more particularly, a sealing member disposed between the valve and the port by using the internal pressure due to the fluid flowing into the valve housing when the port is closed. It relates to a multi-valve device for a vehicle with improved sealing efficiency between a valve and a port by pressing to the valve side.

Vehicles driven by an internal combustion engine engine have various types of valve devices therein. In general, a valve device incorporated in a vehicle is provided for flow, distribution, control or regulation of various types of fluids according to applications such as engine cooling, cooling/heating of room temperature, and recirculation of exhaust gas (EGR system).

Among vehicle valve devices, a valve device capable of controlling a fluid flow path in two or more directions is mainly applied to an engine fluid circulation circuit of an internal combustion engine, and such a valve device is also referred to as a multi-directional switching valve device or a multi-valve device. The multi-valve device is installed in a cooling water passage to supply the cooling water cooled by the radiator to the engine, and functions to appropriately control the cooling water temperature by opening and closing the passage according to the change in the cooling water temperature.

FIG. 1 is a cross-sectional view showing a multi-valve device for a vehicle according to the prior art. The structure and operation of the multi-valve device according to the prior art will be described with reference to FIG. 1.

As shown in FIG. 1, a conventional valve device 1 includes a valve housing 10 and a valve 20.

The valve housing 10 has a plurality of ports 11 through which fluid is introduced or discharged. Further, the valve 20 is rotatably installed in the valve housing 10 through an actuator, and selectively opens and closes the plurality of ports 11 through an opening 20a formed on the outer circumferential surface.

At this time, when the port 11 of the valve housing 10 is shielded by the rotation of the valve 20, that is, when the port 11 of the valve housing 10 and the side surface of the valve 20 are in contact, the port ( A valve seat 30 may be interposed between the port 11 and the valve 20 in order to prevent leakage of fluid from 11). In addition, an elastic member 40 for elastically pressing the valve seat 30 in the direction in which the valve 20 is disposed may be disposed on one side of the valve seat 30. Accordingly, when the port 11 is shielded through the valve 20, the valve seat 30 is in close contact with the valve 20 by the elastic member 40 so that fluid leaks between the port 11 and the valve 20 Can be prevented.

However, the above-described structure has a problem in that the valve seat 30 is deformed because the elastic member 40 always presses the valve seat 30 regardless of whether the valve 20 is opened or closed.

In addition, since the valve seat 30 is pressed only by the force of the elastic member 40, when the elastic force of the elastic member 40 is decreased, there is a problem that fluid leaks into the port 11.

An object of the present invention is to install an elastic member and a sealing member between the port and the valve, and in particular, by improving the structure so that the fluid in the housing can press the sealing member to the valve side together with the elastic member when the port is shielded, It is to provide a multi-valve device for a vehicle with improved sealing and cooling efficiency by preventing fluid from being lost through the gap.

The vehicle multi-valve device according to the present invention for achieving the above object includes a housing, a valve, a sealing member, and an elastic member. The valve housing has a plurality of ports through which fluid is introduced or discharged. The valve is rotatably installed in the valve housing to selectively open and close at least one of the plurality of ports. The sealing member has a flow path through which a fluid flows, and is disposed between the port and the valve to seal at least one port. The elastic member is disposed on one side of the sealing member to elastically press one surface of the sealing member toward the valve. In addition, the sealing member includes a lip seal whose outer circumferential surface is spaced apart from the valve housing to form a gap and a part of the inner circumferential surface is in close contact with the port, and a retainer disposed inside the lip seal to support the lip seal, and fluid flows into the gap to form a gap and It is characterized in that the sealing member is pressed together.

According to the present invention, when at least one port is blocked by the valve, an internal pressure is formed between the gap and the port shielded by the fluid flowing into the valve housing, and the sealing member is pressed toward the valve by the internal pressure.

According to the present invention, a portion of the retainer is exposed to the outside of the lip seal to contact the elastic member, and at least one or more holes are formed along the circumference.

According to the present invention, a plurality of ribs spaced apart along the circumference are formed on the outer peripheral surface of the lip seal, and the ribs are in contact with the valve housing.

According to the present invention, a flow path through which a fluid flows is formed between the ribs, and the flow path forms a gap.

According to the present invention, a flow path through which a fluid flows is formed in the lip seal, and a first hydraulic groove is recessed on a surface facing the elastic member.

According to the present invention, one surface of the lip seal is divided into a pressure support part and a sealing protrusion by the first hydraulic groove part, a part of the pressure support part contacts the elastic member, and the sealing protrusion is formed to be inclined in the direction in which the port is arranged.

According to the present invention, a plurality of sealing protrusions are provided to be in close contact with the outer peripheral surface of the port.

According to the present invention, a second hydraulic groove is recessed along the circumference of the outer peripheral surface of the lip seal.

According to the present invention, the second hydraulic groove portion is formed in a tapered shape, and the fluid pressure is concentrated to the second hydraulic groove portion so that the sealing member is pressed toward the port.

The vehicle multi-valve device according to the present invention for achieving the above object includes a housing, a valve, a sealing member, and an elastic member. The valve housing has a plurality of ports through which fluid is introduced or discharged. The valve is rotatably installed in the valve housing to selectively open and close at least one of the plurality of ports. The sealing member is disposed between the port and the valve to seal at least one port, and a flow path through which a fluid flows is formed inside, and an outer circumferential surface is spaced apart from the valve housing to form a gap. The elastic member is disposed on one side of the sealing member to elastically press one surface of the sealing member toward the valve. When at least one port is blocked by the valve due to this structure, an internal pressure is formed in the valve housing by the fluid, and the sealing member is pressed in the direction in which the valve is disposed by the elastic member and the internal pressure.

According to the present invention, the sealing member includes a lip seal whose outer circumferential surface is spaced apart from the valve housing and part of the inner circumferential surface is in close contact with the port, and a retainer that is partially exposed to the outside of the lip seal and contacts the elastic member. Equipped.

According to the present invention, in the lip seal, a first hydraulic groove is recessed on a surface facing the elastic member, one surface of the lip seal is divided into a pressure support part and a sealing protrusion by a first hydraulic groove part, and a part of the pressure support part is an elastic member. And the sealing protrusion is formed to be inclined in the direction in which the port is arranged.

According to the present invention, a plurality of sealing protrusions are provided to be in close contact with the outer peripheral surface of the port.

According to the present invention, a plurality of ribs spaced apart from each other along the circumference are formed on the outer peripheral surface of the lip seal, and the ribs are in contact with the valve housing.

According to the present invention, each of the ribs is disposed, and the second hydraulic groove is recessed along the outer peripheral surface of the lip seal.

The vehicle multi-valve device according to the present invention for achieving the above object includes a housing, a valve, a sealing member, and an elastic member. The valve housing has a plurality of ports through which fluid is introduced or discharged. The valve is rotatably installed in the valve housing to selectively open and close at least one of the plurality of ports. The sealing member has a flow path through which a fluid flows, and is disposed between the port and the valve to seal at least one port. The elastic member is disposed on one side of the sealing member to elastically press one surface of the sealing member toward the valve. In addition, the sealing member includes a lip seal in which a portion of the inner circumferential surface is in close contact with the port, and a retainer coupled to the outside of the lip seal to support the lip seal, and at least one protrusion is formed on one of the lip seal and the retainer, and the protrusion is on the other. Insertion groove is formed into which is inserted. Further, the retainer is spaced apart from the valve housing to form a gap, and fluid flows into the gap to pressurize the sealing member together with the elastic member.

According to the present invention, the protrusion is formed to extend in a vertical or horizontal direction with respect to the central axis of the sealing member, and the insertion groove is formed in a shape corresponding to the shape of the protrusion, so that the protrusion is fitted in the insertion groove.

According to the present invention, the protrusion is formed in a rectangular or trapezoidal shape.

According to the present invention, the lip seal is formed of a rubber material and the retainer is formed of a plastic material.

According to the present invention, the lip seal and the retainer are combined by a double injection method or an assembly method.

According to the present invention, as the elastic member and the sealing member are installed between the port and the valve, when the valve blocks the port, the elastic member primarily presses the sealing member toward the valve, so that fluid leakage from the port can be prevented. There will be.

In addition, when the port is closed, an internal pressure is formed in the valve housing by the fluid flowing into the valve housing, and the internal pressure acts on the sealing member through the gap formed between the valve housing and the sealing member, so that the sealing member secondarily applies a pressing force. It is applied and can be in close contact with the valve. That is, since the sealing member is secondarily pressurized through the pressure of the fluid as well as the elastic member, the sealing efficiency between the port and the valve is improved.

In addition, even if the elasticity of the elastic member decreases due to long-term use, the sealing member is pressed by the pressure of the fluid, so that it is possible to prevent the fluid from leaking to the port when the valve is blocked.

In addition, when the port is opened, the fluid in the housing flows out to the port through the opening of the valve, so that internal pressure is formed in the valve housing only when the port is closed, so that it is possible to prevent the valve seat from being deformed by the internal pressure.

In addition, by installing a retainer inside the sealing member to improve the strength of the sealing member, it is possible to prevent the sealing member from being deformed when the sealing member is pressed due to the pressure of the elastic member and the fluid.

In addition, by forming a plurality of hydraulic grooves, sealing protrusions, ribs, and the like in the sealing member to improve adhesion between the sealing member and the port, it is possible to increase the sealing efficiency of the port.

In addition, by coupling a retainer to the outside of the lip seal, it is possible to efficiently seal the elastic member and fluid pressure while maintaining the strength of the sealing member when the port is shielded.

In addition, since the retainer is formed of a plastic material having a lower strength than stainless steel, it is possible to prevent the lip seal from being hardened or damaged when the sealing member is pressed due to the pressure of the elastic member and the fluid.

1 is a cross-sectional view showing a vehicle multi-valve device according to the prior art.
2 is a perspective view of a vehicle multi-valve device according to an embodiment of the present invention.
3 is an exploded perspective view of the vehicle multi-valve device shown in FIG. 2.
4 is a cross-sectional view of the vehicle multi-valve device shown in FIG. 3.
5 is a perspective view showing an excerpt of the sealing member shown in FIG. 3.
Figure 6 is an exploded perspective view of the sealing member shown in Figure 5;
7 is a perspective view showing a sealing member according to another embodiment.
8 is a cross-sectional view of a vehicle multi-valve device in which the sealing member shown in FIG. 7 is installed.
9 is a perspective view showing a sealing member according to another embodiment.
10 is a cross-sectional view of a multi-valve device for a vehicle in which the sealing member shown in FIG. 9 is installed.
11 is a perspective view showing a sealing member according to another embodiment.
12 is a cross-sectional view of a multi-valve device for a vehicle in which the sealing member shown in FIG. 11 is installed.
13 is a perspective view of a multi-valve device for a vehicle according to another embodiment of the present invention.
14 is a perspective view showing an extract of the sealing member shown in FIG. 13;
15 is a cross-sectional view of a multi-valve device for a vehicle equipped with a sealing member according to another embodiment of the present invention.
16 is a perspective view of a sealing member according to another embodiment of the present invention.
17 and 18 are cross-sectional views of a multi-valve device for a vehicle in which a sealing member is installed according to another embodiment of the present invention, respectively.

Hereinafter, a detailed description will be given of a multi-valve device for a vehicle according to a preferred embodiment with reference to the accompanying drawings. Here, the same symbols are used for the same configuration, and detailed descriptions of repetitive descriptions and known functions and configurations that may unnecessarily obscure the subject matter of the invention are omitted. Embodiments of the invention are provided to more completely explain the invention to those with average knowledge in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

2 is a perspective view of a multi-valve device for a vehicle according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of the multi-valve device for a vehicle shown in FIG. 2, and FIG. 4 is a cross-sectional view of the multi-valve device for a vehicle shown in FIG. to be. In addition, FIG. 5 is a perspective view showing an extract of the sealing member shown in FIG. 3, and FIG. 6 is an exploded perspective view of the sealing member shown in FIG. 5.

As shown in FIGS. 2 to 6, the multi-valve device 100 for a vehicle includes a valve housing 110, a valve 120, a sealing member 130, and an elastic member 140.

For reference, the multi-valve device 100 described in the present invention is mounted on a vehicle equipped with an engine E, which is an internal combustion engine, and the fluid (coolant) between the engine E, the radiator R and the cooler C Illustrated and illustrated as controlling the flow. However, the present invention is not limited thereto, and may be applied to various flow channels as long as it is for controlling the flow of fluid through a plurality of paths.

The valve housing 110 has a receiving space 110a for accommodating a valve 120 to be described later, and includes a plurality of ports 111 through which fluid is introduced or discharged. That is, the port 111 of the valve housing 110 may be an inlet port 111a or an outlet port 111b depending on the connection direction.

The plurality of ports 111 provided in the valve housing 110 may provide a path through which cooling water is introduced and a path through which the cooling water is discharged to the radiator R and the cooler C. At this time, the port 111 may be coupled in a form in which a part of the valve housing 110 is inserted, and between the valve housing 110 and the port 111 to prevent fluid from leaking out of the valve housing 110 O-rings can be installed. The number of ports 111 is not limited, but in this embodiment, one inlet port 111a is provided and two discharge ports 111b are provided.

The valve housing 110 may be formed of a metal material or engineering plastic that is resistant to corrosion such as stainless steel or brass.

The valve 120 is rotatably installed in the valve housing 110 to selectively open and close at least one of the plurality of ports 111. Specifically, the valve 120 may be formed in a spherical shape, and a flow path 120a through which a fluid flows may be formed. The flow path 120a is an empty space formed inside the valve 120, and may provide a space through which fluid can flow or a space in which fluid can be temporarily accommodated. In addition, at least one opening 121 may be formed on the side of the valve 120 to selectively communicate with the port 111. The opening 121 may be formed by cutting one surface of the valve 120 and may be formed in a shape corresponding to the inlet of the port 111.

Meanwhile, an actuator 160 that provides a driving force to the valve 120 may be installed at one side of the valve housing 110, and the valve 120 may rotate by receiving a driving force from the actuator 160.

Accordingly, when the valve 120 is rotated at a predetermined angle by the actuator 160, the inlet port 111a is opened so that the fluid can flow into the valve 120 through the inlet port 111a, and The fluid may be discharged to the outside of the valve housing 110 through at least one discharge port 111b in communication with the opening 121 of the valve 120. Here, the rotation shaft of the actuator 160 may be located on the same line as the rotation shaft 122 of the valve 120.

On the contrary, when the valve 120 rotates at a different angle, the inlet port 111a is shielded, thereby preventing the fluid from being discharged from the inlet port 111a to the discharge port 111b.

The sealing member 130 has a flow path 130a through which a fluid flows, and is disposed between the port 111 and the valve 120 to seal at least one port 111. Specifically, a stepped 133 on which one surface of the port 111 is seated may be formed on the inner circumferential surface of the sealing member 130. Accordingly, the contact area between the sealing member 130 and the port 111 is increased, thereby improving sealing efficiency.

Meanwhile, a valve seat 150 may be installed between the sealing member 130 and the valve 120. The valve seat 150 may have a surface facing the valve 120 in a shape corresponding to the outer circumferential surface of the valve 120 to be in close contact with the valve 120. That is, since the valve 120 is formed in a spherical shape, one side is further provided with a valve seat 150 formed equal to the outer peripheral surface of the valve 120, thereby increasing the airtightness between the port 111 and the valve 120. .

The valve seat 150 may be formed of a polytetrafluoroethylene (PTFE) material having a low coefficient of friction and good chemical resistance. As the valve seat 150 is formed of a material having a low coefficient of friction as described above, it is possible to reduce the wear of the valve seat 150 by reducing a dynamic friction load when the valve is rotated. The valve seat 150 may be coupled to the sealing member 130 by an force fitting method, and a flow path through which a fluid flows may be formed.

The elastic member 140 is a type of wave spring, and is disposed on one side of the sealing member 130 to elastically press one surface of the sealing member 130 toward the valve 120. Specifically, the elastic member 140 may be formed to surround the outer circumferential surface of the port 111 so that one surface may be supported by the port 111, and may be formed of a stainless steel material that is resistant to corrosion.

Each of the elastic member 140 and the sealing member 130 may be provided in plural corresponding to the number of ports 111. As the sealing member 130 is in close contact with the outer circumferential surface of the valve 120 by the elastic member 140 as described above, the airtightness between the port 111 and the valve 120 is maintained, so that the valve 120 connects the port 111 When shielding, it is possible to block leakage of fluid from the port 111.

5 to 6, the sealing member 130 includes a lip seal 131 and a retainer 132.

The lip seal 131 has an outer circumferential surface spaced apart from the valve housing 110 to form a gap 31a, and a part of the inner circumferential surface is in close contact with the port 111. The lip seal 131 may be formed of an EPDM (Ethylene Propylene Diene Monomer) material having excellent wear resistance, but is not limited thereto.

As the gap 31a is formed between the lip seal 131 and the valve housing 110 as described above, when at least one port 111 is blocked by the valve 120, the fluid flows into the gap 31a and is elastic. The sealing member 130 is pressed together with the member 140.

That is, when the port 111 is closed, an internal pressure is formed in the valve housing 110 by the fluid flowing into the valve housing 110. Then, the elastic member 140 and the sealing member 130 surrounding the inlet side of the port 111 by the fluid that has passed through the gap 31a is pressed toward the valve 120, so that the sealing member 130 and the valve 120 ), the airtightness is improved. Conversely, when the port 111 is opened, the fluid in the valve housing 110 flows out to the port 111 through the opening 121 of the valve 120, so that internal pressure due to the fluid is not formed in the valve housing 110. Instead, it is possible to reduce the deformation of the valve seat 150 by pushing the sealing member 130 only by the force of the elastic member 140.

As such, when the port 111 is closed, an internal pressure is formed in the valve housing 110, so that the valve seat 150 is not deformed by the internal pressure. In addition, in the related art, the sealing member 130 is pressed only with the elastic member 140 to seal the port 111 and the valve 120, but according to the present invention, the sealing member ( Since the pressure 130), the sealing efficiency between the port 111 and the valve 120 is improved.

In addition, even if the elasticity of the elastic member 140 is reduced due to long-term use, the sealing member 130 is pressed by the pressure of the fluid, so when the valve 120 is shut off, the fluid leaks between the port 111 and the valve 120 It can be prevented from becoming.

Meanwhile, a flow path 130a through which a fluid flows may be formed in the lip seal 131, and a first hydraulic groove 31b recessed along a circumference of a surface facing the elastic member 140 may be formed. As the first hydraulic groove part 31b is formed on one side of the lip chew, the pressure of the fluid is concentrated to the first hydraulic groove part 31b when the valve 120 blocks the port 111, and the sealing protrusion 32 to be described later. ) Is pressed toward the outer peripheral surface of the port 111, it is possible to increase the sealing effect between the sealing member 130 and the port 111.

Due to the first hydraulic groove 31b, one surface of the lip seal 131 may be divided into a pressure support 31 and a sealing protrusion 32. The pressure support part 31 is a part extending from the outer circumferential surface of the lip seal 131 based on the first hydraulic groove part 31b, and a part of the pressure support part 31 may contact the elastic member 140. In addition, the sealing protrusion 32 is a portion extending inward of the lip seal 131 with respect to the first hydraulic groove 31b, and may be formed to be inclined in the direction in which the port 111 is disposed.

In this way, as the sealing protrusion 32 is formed to be inclined in the direction in which the port 111 is arranged, that is, in the direction of the inner circumferential surface of the sealing member 130, the adhesion between the outer circumferential surface of the port 111 and the sealing protrusion 32 is improved. , When the port 111 is shielded, it is possible to prevent the fluid in the valve housing 110 from leaking to the port 111.

The retainer 132 is disposed inside the lip seal 131 to support the lip seal 131, and a part of the tip may be exposed to the outside of the lip seal 131 to contact the elastic member 140. The retainer 132 has good strength and may be formed of a stainless steel material that is resistant to corrosion.

As the retainer 132 is disposed inside the lip seal 131 as described above, when the sealing member 130 is pressurized by the elastic member 140 and the fluid, the lip seal 131 is contracted and deformed. That is, if the sealing member 130 is formed only with the lip seal 131 made of a rubber material having good elasticity, it may be deformed due to the pressure of the elastic member 140 and the fluid, so that the retainer 132 is provided inside the lip seal 131 It is to improve the sealing efficiency and strength of the elastic member 140.

The retainer 132 and the lip seal 131 may be coupled by an insert injection method. A plurality of holes 132a may be formed around the retainer 132 in order to improve the bonding force between the retainer 132 and the lip seal 131 during insert injection.

7 is a perspective view showing a sealing member according to another embodiment, and FIG. 8 is a cross-sectional view of a multi-valve device for a vehicle in which the sealing member shown in FIG. 7 is installed. In this embodiment, a description will be made focusing on differences from the above-described invention.

As shown in FIGS. 7 to 8, the sealing member 130A includes a lip seal 131 and a retainer 132. Here, the lip seal 131 may be divided into a pressure support part 31 and a sealing protrusion 32 by a first hydraulic groove part 31b formed on one surface thereof. In addition, a plurality of sealing protrusions 32 may be provided to be in close contact with the outer peripheral surface of the port 111. Specifically, the sealing protrusion 32 may include a first sealing protrusion 32a and at least one second sealing protrusion 32b.

The first sealing protrusion 32a is a portion extending from the inner circumferential surface of the lip seal 131 with respect to the first hydraulic groove 31b and is formed to be inclined in the direction in which the port 111 is disposed. At least one second sealing protrusion 32b is provided and is disposed on one side of the first sealing protrusion 32a, protrudes from the inner circumferential surface of the lip seal 131, and both sides taper in the direction in which the port 111 is disposed. ) Can be formed to have. The protruding surfaces of the first sealing protrusion 32a and the second sealing protrusion 32b are in close contact with the outer circumferential surface of the port 111, respectively, and the sealing efficiency of the port 111 is improved by the plurality of sealing protrusions 32 do.

9 is a perspective view showing a sealing member according to another embodiment, and FIG. 10 is a cross-sectional view of a multi-valve device for a vehicle in which the sealing member shown in FIG. 9 is installed. In this embodiment, a description will be made focusing on differences from the above-described invention.

As shown in FIGS. 9 to 10, the sealing member 130B includes a lip seal 131 and a retainer 132. Further, a plurality of ribs 33 spaced apart from each other along the circumference are formed on the outer circumferential surface of the lip seal 131, and the ribs 33 may contact the valve housing 110.

As the ribs 33 are formed on the outer circumferential surface of the lip seal 131, when the sealing member 130B is pressed toward the valve 120 by the pressure of the elastic member 140 and the fluid, the pressure support part 31 Accordingly, it can be prevented from being bent upward and blocking the gap 31a. For this purpose, it is preferable that the height of the rib 33 is formed higher than the height of the pressure support part 31.

As the ribs are formed on the outer circumferential surface of the lip seal 131 as described above, it is possible to stably maintain the pressure of the fluid applied to the sealing member 130B when the port 111 is shielded. At this time, since a certain space through which a fluid can pass is formed between the plurality of ribs 33, this space becomes a part forming the gap 31a.

11 is a perspective view illustrating a sealing member according to another embodiment, and FIG. 12 is a cross-sectional view of a multi-valve device for a vehicle in which the sealing member shown in FIG. 11 is installed. In this embodiment, a description will be made focusing on differences from the above-described invention.

As shown in FIGS. 11 to 12, the sealing member 130C includes a lip seal 131 and a retainer 132. In addition, a second hydraulic groove 31c recessed along the circumference may be formed on the outer peripheral surface of the lip seal 131.

As the second hydraulic groove 31c is formed on the outer circumferential surface of the lip seal 131, the area of the gap 31a may be partially increased. Accordingly, when the valve 120 shields the port 111, the pressure of the fluid is concentrated to the second hydraulic groove 31c, so that the sealing member 130C can be pressurized in the direction in which the port 111 is disposed.

For example, when fluid flows into the valve housing 110 while the port 111 is shielded, an internal pressure is formed in the valve housing 110, and the internal pressure is concentrated to the second hydraulic groove 31c. At this time, the 2 hydraulic grooves 31c are formed in a'V' shape having a taper shape, so that the pressure may increase toward the lower side. Accordingly, the sealing member 130C increases the pressure applied downward compared to the sealing member in which the second hydraulic groove portion 31c is not formed, so that the adhesion between the sealing protrusion 32 and the outer peripheral surface of the port 111 is increased. Increase, and the sealing efficiency is improved.

That is, the first hydraulic groove (31b) is to increase the adhesion between the sealing member (130C) and the valve 120, the second hydraulic groove (31c) is the sealing protrusion (32) and the port ( 111) is to increase the adhesion between the outer circumferential surfaces. As the adhesion between the sealing protrusion 32 of the sealing member 130C and the outer circumferential surface of the port 111 is increased, it is possible to prevent a fluid from leaking between the port 111 and the sealing member 130C.

13 is a cross-sectional view of a multi-valve device for a vehicle according to another embodiment of the present invention, and FIG. 14 is a perspective view showing an extract of the elastic member shown in FIG. 13. In this embodiment, a description will be made focusing on differences from the above-described invention.

13 to 14, the multi-valve device 200 for a vehicle includes a valve housing 210 having a plurality of ports 211 through which a fluid is introduced or discharged, and rotatable within the valve housing 210. A valve 220 that is installed and selectively opens and closes at least one of the plurality of ports 211, and is disposed between the port 211 and the valve 220 to seal at least one port 211. A flow path 220a is formed and the outer circumferential surface of the sealing member 230 is spaced apart from the valve housing 210 to form a gap 31a, and the sealing member 230 is disposed on one side of the sealing member 230. It includes an elastic member 240 for elastically pressing one side toward the valve 220.

Due to this structure, when the valve 220 blocks at least one port 211, an internal pressure is formed in the valve housing 210 by the fluid flowing into the valve housing 210, and the sealing member 230 is an elastic member. The valve 220 may be pressed in the direction in which the valve 220 is disposed by the 240 and internal pressure. That is, the sealing member 230 is firstly pressurized by the elastic member 240 and secondarily pressurized through the fluid introduced into the gap 31a.

Specifically, the sealing member 230 includes a lip seal 231 and a retainer 232.

The lip seal 231 has an outer circumferential surface spaced apart from the valve housing 210 and a part of the inner circumferential surface is in close contact with the port 211. The lip seal 231 has a first hydraulic groove portion 31b recessed along the circumference of the surface facing the elastic member 240, and one surface of the lip seal 231 is pressed by the first hydraulic groove portion 31b. (31) and may be divided into a sealing protrusion (32). In addition, a part of the pressure support part 31 may contact the elastic member 240 and the sealing protrusion 32 may be formed to be inclined in the direction in which the port 211 is disposed. In this case, a plurality of sealing protrusions 32 may be provided to be in close contact with the outer peripheral surface of the port 211.

On the other hand, in order to prevent the sealing member 230 from shielding the gap 31a due to the twisting of the rotational axis of the sealing member 230, a plurality of ribs 33 spaced apart from each other along the circumference of the lip seal 231 Can be formed. These ribs 33 may be arranged to be in contact with the valve housing 210, and fluid that has passed through the outer peripheral surface of the valve 220 flows through the space between the ribs 33 in the direction in which the elastic member 240 is disposed. Can be.

At this time, between each of the ribs 33 is formed with a second hydraulic groove (31c) recessed along the outer circumference of the lip seal 231, the pressure of the fluid when the valve 220 shields the port 211 It can be concentrated to the second hydraulic groove (31c). Accordingly, it is possible to prevent leakage of fluid into the port 211 by improving the adhesion between the sealing member 230 and the port 211.

The retainer 232 is disposed inside the lip seal 231 to support the lip seal 231, and a part of the retainer 232 is exposed outside the lip seal 231 to contact the elastic member 240. The retainer 232 improves the strength of the rib 33 having good elasticity, so that the sealing member 230 can be prevented from being deformed when the sealing member 230 is pressed by the elastic member 240.

15 is a cross-sectional view of a multi-valve device for a vehicle equipped with a sealing member according to another embodiment of the present invention, and FIG. 16 is a perspective view of a sealing member according to another embodiment of the present invention.

In this embodiment, a description will be made focusing on differences from the above-described embodiment.

The vehicle multi-valve device 300 includes a valve housing 310 having a plurality of ports 311 through which a fluid is introduced or discharged, and at least one of the plurality of ports 311 is rotatably installed in the valve housing 310. The valve 320 that selectively opens and closes the valve 320 and is disposed between the port 311 and the valve 320 to seal at least one port 311, and a flow path 320a through which a fluid flows is formed and the outer circumferential surface is A sealing member 330 that is spaced apart from the valve housing 310 to form a gap 31a, and an elasticity that is disposed on one side of the sealing member 330 to elastically press one surface of the sealing member 330 toward the valve 320 Including member 340.

Specifically, the sealing member 330 includes a lip seal 331 and a retainer 332.

A portion of the lip seal 331 is in close contact with the port 311 on the inner circumferential surface. The lip seal 331 is formed with a first hydraulic groove 31b recessed along the circumference of the surface facing the elastic member 340, and one surface of the lip seal 331 is pressed by the first hydraulic groove 31b. (31) and may be divided into a sealing protrusion (32).

The retainer 332 may be coupled to the outside of the lip seal 331 to support the lip seal 331, and may be spaced apart from the valve housing 310 to form a gap 31a. The retainer 332 may be formed of a plastic or synthetic resin material, and accordingly, the outer wall of the lip seal 332 is damaged due to hardening of the lip seal 331 compared to the case where the retainer 332 is formed of a metal material such as stainless steel. And there is an effect capable of preventing deterioration of the sealing function.

Specifically, the elastic member 340 is formed of a metal material such as stainless steel, and a retainer 332 made of a metal material is disposed with the elastic member 340 and rubber (a part of the lip seal 331) interposed therebetween. When the lower lip seal 331 is subjected to pressure for a long period of time, a problem may occur that the rubber of the lip seal 331 may harden and break. Since the retainer 332 is formed of a plastic or synthetic resin material and is bonded to the lip seal 331 Accordingly, damage to the outer wall of the lip seal 332 due to hardening of the lip seal 331 and deterioration of the sealing function can be prevented.

On the other hand, an embodiment in which the elastic member 340 is formed of plastic such as the retainer 332 may be considered, and in this case, the effect of preventing abrasion and corrosion of the elastic member 340 may be increased.

As the retainer 332 is coupled to the outside of the lip seal 331, the sealing member 330 has a lip seal 331 made of a flexible rubber material disposed inside to seal the port 311 and the valve 320 to allow fluid to flow. Leakage can be prevented, and a retainer 332 made of plastic or synthetic resin is coupled to the outside to support the lip seal 331 while maintaining the strength of the sealing member 330.

In addition, a retainer 332 made of plastic or synthetic resin is coupled to the outer rim of the lip seal 331 to prevent the lip seal 331 from expanding or contracting in a high or low temperature state, and accordingly, the lip seal 331 It is possible to prevent jamming with other parts, and it is possible to prevent the gap 31a between the sealing member 330 and the valve housing 310 from being reduced, thereby securing a minimum gap 31a through which coolant can flow. have.

Cooling water flows toward the elastic member 340 through the gap 31a, and when the port 311 is closed, the cooling water in the valve housing 310 moves the sealing member 330 together with the elastic member 340 toward the valve 320. It is the same as the above-described embodiment that the sealing efficiency between the port 311 and the valve 320 is improved by pressing.

At least one or more protrusions 331a may be formed in one of the lip seal 331 and the retainer 332, and at least one insertion groove into which the protrusion 331a is inserted may be formed in the other.

In other words, the portion where the lip seal 331 and the retainer 332 are coupled may be formed in an uneven shape that meshes with each other, and an insertion groove into which the protrusion 331a is inserted is formed in the portion facing the protrusion 331a. I can.

Referring to FIG. 15, the protrusion 331a formed on the lip seal 331 and the retainer 332 is a central axis of the sealing member 330 (the flow direction of the fluid flowing in and discharged through the port 311, that is, the valve 320 ) May be formed to extend along the circumference of the lip seal 331 in a direction perpendicular to the axis of rotation).

In this case, the lip seal 331 and the retainer 332 may have an insertion groove formed in a shape corresponding to the protrusion 331a, and the protrusion 331a may be coupled to the insertion groove in a manner of fitting.

In this way, as the lip seal 331 and the retainer 332 are coupled by fitting the protrusion 331a into the insertion groove having a shape corresponding thereto, the coupling force between the lip seal 331 and the retainer 332 may be improved.

Meanwhile, the retainer 332 and the lip seal 331 may be coupled to each other in a manner in which the retainer 332, which is a plastic structure, is a double injection method or assembles each other to the lip seal 331, which is a rubber material.

17 is a cross-sectional view of a multi-valve device for a vehicle equipped with a sealing member according to another embodiment of the present invention.

Referring to FIG. 17, the lip seal 331 of the vehicle multi-valve device in which the sealing member according to the present embodiment is installed and the protrusion 331a of the retainer 332 ′ have a central axis (port 311) of the sealing member 330. It may be formed to protrude in a direction parallel to the flow direction of the fluid flowing in and out through, that is, an axis crossing the rotation axis of the valve 320 (horizontal direction in FIG. 17).

A plurality of protrusions 331a formed on the lip seal 331 and the retainer 332 ′ may be formed, and the height and protrusion length of the protrusion 331a may be variously formed.

In the case of the embodiment shown in Fig. 17, compared to the embodiment shown in Fig. 15 in which the protrusion 331a is formed in the vertical direction, the bonding force between the lip seal 331 and the retainer 332' is increased as the protrusion 331a is formed in the horizontal direction. This can be further improved, and thus, it is possible to prevent the retainer 332 ′ from being separated from the lip seal 331.

18 is a cross-sectional view of a multi-valve device for a vehicle in which a sealing member is installed according to another embodiment of the present invention.

Meanwhile, referring to FIG. 18, a protrusion 331a having a trapezoidal cross section may be formed in the retainer 332 ″ of the vehicle multi-valve device in which the sealing member according to the present embodiment is installed, and the lip seal 331 An insertion groove may be formed in a shape corresponding to the protrusion 331a. Conversely, the lip seal 331 may be formed with a protrusion 331a having a trapezoidal cross section, and of course, an insertion groove may be formed in a shape corresponding to the protrusion 331a in the retainer 332''. .

These protrusions 331a may be formed in a trapezoidal hook structure with a wider width toward the inside of the insertion groove, and this shape prevents the retainer 332'' from being separated from the lip seal 331 , The lip seal 331 and the retainer 332 ″ may be detachably coupled.

In addition, the angle of the inclined surface of the protrusion 331a coupled with the lip seal 331 may be formed differently.

As described above, by arranging the plastic retainers 332, 332', 332'' on the outside of the lip seal 331, preferably the outermost of the rubber lip seal 331, the port 311 is shielded. While adequately maintaining the strength of the sealing member 330 due to the fluid pressure, there is an effect of efficiently sealing through the lip seal 331 and the elastic member 340.

The present invention has been described with reference to one embodiment shown in the accompanying drawings, but this is only illustrative, and those of ordinary skill in the art will understand that various modifications and other equivalent embodiments are possible therefrom. I will be able to. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

110.. Valve housing
111.. port
120.. valve
130.. Sealing member
131.. Lip seal
31a.. gap
31b.. First hydraulic groove
31c.. 2nd hydraulic groove
132..Retainer
140.. Elastic member
150.. Valve seat
160.. actuator

Claims (21)

A valve housing having a plurality of ports through which fluid is introduced or discharged;
A valve rotatably installed in the valve housing to selectively open and close at least one of the plurality of ports;
A sealing member having a flow passage through which the fluid flows, and being disposed between the port and the valve to seal the at least one port; And
And an elastic member disposed on one side of the sealing member to elastically press one surface of the sealing member toward the valve,
The sealing member,
A lip seal having an outer circumferential surface spaced apart from the valve housing to form a gap, and a lip seal having a portion of the inner circumferential surface in close contact with the port, and a retainer disposed inside the lip seal to support the lip seal,
Part of the retainer is exposed to the outside of the lip seal so that the exposed portion contacts the elastic member, and at least one hole is formed along the circumference thereof,
When the at least one port is blocked by the valve, an internal pressure is formed between the shielded port and the gap by the fluid flowing into the valve housing,
The sealing member is pressurized toward the valve by the elastic member and internal pressure, and the fluid flows into the gap to press the sealing member together with the elastic member,
A flow path through which the fluid flows is formed in the lip seal, and a first hydraulic groove is recessed on a surface facing the elastic member, so that one surface of the lip seal is divided into a pressure support part and a sealing protrusion by the first hydraulic groove. , When the valve blocks the port, the pressure of the fluid is concentrated to the first hydraulic groove so that the sealing protrusion is pressed toward the outer peripheral surface of the port,
A second hydraulic groove is recessed along the circumference of the outer circumferential surface of the lip seal,
The second hydraulic groove portion is formed in a'V' shape having a tapered shape, and the pressure increases toward the lower side,
The area of the gap is increased by the second hydraulic groove, and when the valve blocks the port, the pressure of the fluid is concentrated to the second hydraulic groove and the sealing member is pressed toward the port,
The sealing protrusion is a portion extending on the inner circumferential surface of the lip seal with respect to the first hydraulic groove and a first sealing protrusion formed to be inclined in a direction in which the port is disposed, and at least one is disposed on one side of the first sealing protrusion, And a second sealing protrusion protruding from the inner circumferential surface of the lip seal and having both sides tapered in a direction in which the port is arranged, and the protruding surfaces of the first sealing protrusion and the second sealing protrusion are an outer circumferential surface of the port Close to,
A plurality of ribs spaced apart from each other are formed on the outer circumferential surface of the lip seal, the ribs are in contact with the valve housing, a flow path through which the fluid flows is formed between the ribs, and the flow path forms the gap, and the The rib is a multi-valve device for a vehicle that prevents the pressurizing support portion from being bent upward by pressure to close the gap when the sealing member is pressed toward the valve by the pressure of the elastic member and fluid. delete delete delete delete delete The method of claim 1,
A part of the pressure support part contacts the elastic member, and the sealing protrusion is formed to be inclined in a direction in which the port is disposed. delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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