CN108930777B - Temperature regulating valve - Google Patents

Temperature regulating valve Download PDF

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Publication number
CN108930777B
CN108930777B CN201710379386.5A CN201710379386A CN108930777B CN 108930777 B CN108930777 B CN 108930777B CN 201710379386 A CN201710379386 A CN 201710379386A CN 108930777 B CN108930777 B CN 108930777B
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China
Prior art keywords
port
valve
elastic
elastic component
pressure relief
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CN201710379386.5A
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CN108930777A (en
Inventor
罗勇进
裘浩明
廖志勇
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Zhejiang Sanhua Automotive Components Co Ltd
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Zhejiang Sanhua Automotive Components Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0412Cooling or heating; Control of temperature
    • F16H57/0413Controlled cooling or heating of lubricant; Temperature control therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/002Actuating devices; Operating means; Releasing devices actuated by temperature variation

Abstract

The invention discloses a temperature regulating valve, which comprises a valve body, a thermal element and a pressure relief ring, wherein a valve cavity is arranged in the valve body; the first valve port is opened or closed through the thermal element, and the first port is communicated or not communicated with the third port; when the first valve port is opened, the first elastic component is in a compressed state, the second elastic component is in a natural telescopic state, the initial elastic deformation force of the second elastic component is larger than or equal to the elastic force generated by the first elastic component when the first valve port is closed, when the thermal actuator is heated and expanded, the thermal actuator moves downwards to compress the first elastic component until the first valve port is closed, and the channel between the thermal actuator and the pressure relief ring is closed and opened by extending or shortening the thermal actuator, so that the disconnection and communication of the channel between the first interface and the third interface are realized, the parts in the valve body are reduced, and the factor causing the leakage in the valve body is reduced.

Description

Temperature regulating valve
Technical Field
The invention relates to the field of fluid control, in particular to a temperature regulating valve.
Background
During the running process of the automobile, all parts of the automobile need to be lubricated by lubricating oil in time to ensure the normal running of the automobile. If the lubricating performance of the lubricating oil is not good enough, the service life of the automobile is affected. The lubricating performance of the lubricating oil is greatly related to the temperature of the lubricating oil, and when the temperature of the lubricating oil is too high, the lubricating performance of the lubricating oil is affected.
The temperature of the lubricating oil is generally not too high during normal running, and when the vehicle is overloaded or set in a four-wheel drive mode during snow running or off-road running and the vehicle runs under the transient slipping condition of the hydraulic torque converter, the temperature of the oil in the gearbox can be too high, so that the lubricating performance is lost.
The gearbox oil mainly realizes the temperature regulation function through a cooling flow path consisting of a temperature regulation valve and an external cooling device. When the temperature of the oil way of the gearbox rises, the thermosensitive substance of the thermal element is heated and expanded, the gearbox oil directly flows back to the channel of the gearbox to be sealed, and the high-temperature oil enters the external cooling device to be cooled and then flows back to the external cooling device of the gearbox. Therefore, the temperature regulating valve is an important control element in a transmission oil cooling flow path, and how to provide the temperature regulating valve with a simple structure is a technical problem which needs to be solved urgently by a person skilled in the art.
Disclosure of Invention
The technical scheme of the invention provides a temperature regulating valve, which comprises a valve body and a thermal element, wherein a valve cavity is arranged in the valve body; the valve body is at least provided with three interfaces communicated with the outside, and the three interfaces comprise a first interface, a second interface and a third interface; a pressure relief ring is further arranged in the valve cavity, the pressure relief ring and the valve body are axially sealed in a sliding mode, the pressure relief ring is provided with a first valve port, a second elastic part is arranged between the pressure relief ring and the bottom wall of the valve cavity, one end of the second elastic part is in contact with the pressure relief ring, the other end of the second elastic part is in contact with the bottom wall of the valve cavity, a first elastic part is further arranged between the thermal actuator and the pressure relief ring, one end of the first elastic part is in contact with the thermal actuator, and the other end of the first elastic part is in contact with the pressure relief ring;
the thermal element opens or closes the first valve port, and the first port is communicated or not communicated with the third port;
when the first valve port is opened, the first elastic component is in a compressed state, the second elastic component is in a natural telescopic state, the initial elastic deformation force of the second elastic component is greater than or equal to the elastic force generated by the first elastic component when the first valve port is closed, and when the thermal element expands under heat, the thermal element moves downwards to compress the first elastic component until the first valve port is closed.
The valve cavity and the matching section of the pressure relief ring in sliding sealing have a certain length, when the first valve port is closed and the fluid pressure in the valve cavity is greater than the elastic force of the second elastic component at the moment, the fluid medium pushes the pressure relief ring to compress the second elastic component to move downwards, and the first interface and the third interface are communicated at the moment.
When the first valve port is closed, the thermal element pushes the pressure relief ring to compress the second elastic component to move downwards, and at this time, the first interface is not communicated with the third interface.
At least a part of the outer wall of the thermal element is in sliding seal with the inner wall of the first valve port, the initial elastic deformation force of the second elastic component is larger than the elastic force generated by the first elastic component when the first valve port is closed, when the outer wall of the thermal element is in sliding seal with the inner wall of the first valve port, the first valve port is closed, when the first valve port is closed and the fluid pressure in the valve cavity is larger than the initial elastic deformation force or the elastic force of the second elastic component when the first valve port is closed, the fluid medium pushes the pressure relief ring to compress the second elastic component to move downwards, and the first interface and the third interface are communicated.
The first port and the second port are provided with a second valve port on a flow channel, the second valve port is opened or closed through the thermal element, and the first port and the second port are communicated or not communicated; when the first valve port is opened, the thermal element closes the second valve port; the second valve port opens when the thermal element moves downward.
The valve cavity is further provided with a spring mounting section, the radial size of the spring mounting section is smaller than that of the matching section, and the lower end of the second elastic component is supported on a step surface formed by the lower end of the spring mounting section and the valve cavity.
The pressure relief ring comprises a top wall and a side wall, the side wall is in sliding seal with the valve body, and the top wall is provided with the first valve port; the top wall and the side wall form an installation cavity, the upper end part of the second elastic component is arranged in the installation cavity, the upper end surface of the second elastic component abuts against the top wall, the peripheral wall of the first valve port is provided with an inclined chamfer, the lower end part of the thermal actuator is provided with a circular arc surface, and the inclined chamfer and the circular arc surface are circumferentially matched to abut against a line for sealing.
The upper end of the valve body is also provided with a mounting hole coaxial with the thermal actuator, the mounting hole is communicated with the valve cavity, an end cover is fixed in the mounting hole, and the radial dimension of the mounting hole is larger than or equal to the maximum outer diameter of the valve cavity;
the thermal actuator comprises a push rod and a thermal actuator body, one end of the push rod is installed in the end cover, and the other end of the push rod is connected with the thermal actuator body; the lower end part of the end cover extends to the interior of the valve cavity, the second valve port is formed in the end cover, and a channel for communicating the second valve port with the second port is formed in the end cover.
The lower end surface of the end cover is provided with a groove, the opening of the groove is the second valve port, the upper end surface of the thermal element body is provided with a boss which is matched and abutted with the bottom wall of the groove, and the side wall of the groove is provided with a channel which is communicated with the inner cavity of the groove and the second interface.
The valve body is also provided with a fourth interface communicated with the outside, and the fourth interface is communicated with the third interface.
The temperature regulating valve provided by the invention is communicated with the extension or shortening of the thermal dynamic element to close or open the first valve port, has a simple structure, and is more convenient to install because the second spring is in a natural telescopic state.
Drawings
FIG. 1 is a schematic perspective view of a thermostatic valve according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the trim valve of FIG. 1;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the thermostat valve T1 and T2 shown in FIG. 1 with the ports open;
FIG. 5 is a schematic cross-sectional view of the thermostat valve T1 of FIG. 1 with the C1 port open;
FIG. 6 is a schematic cross-sectional view of the thermostat valve T1 and C1 ports and T1 and T2 ports of FIG. 1 being simultaneously open;
FIG. 7 is a schematic cross-sectional view of a pressure relief ring in an embodiment of the present invention;
FIG. 8 is a schematic three-dimensional view of a thermal element according to one embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of the thermal element of FIG. 8;
FIG. 10 is a schematic three-dimensional perspective view of an end cap of the trim valve of FIG. 1;
FIG. 11 is a cross-sectional schematic view of the end cap of FIG. 10.
Wherein, in fig. 1 to 11:
the valve comprises a valve body 1, a first valve port 1a and a second valve port 1 b; the spring mounting section 12 is arranged on the spring mounting section 11, and the first interface T1, the second interface C1, the third interface T2 and the fourth interface C2 are arranged on the spring mounting section;
the thermal actuator 2, the push rod 21, the thermal actuator body 22, the cambered surface 22a and the boss 23;
a first elastic member 3;
a second elastic member 4;
a pressure relief ring 5, a top wall 51, a side wall 52, a pressure relief through hole 53, a bevel chamfer 5a,
End cover 6, sealing section 61, boss 62, installation cavity 63, recess 64.
Detailed Description
The technical solutions are specifically described below with reference to the drawings and the detailed description, and the terms of upper and lower directions and the like in the description are all set forth according to the corresponding directional relationships of the drawings.
Referring to fig. 1 to 6, 8 and 9, fig. 1 is a perspective view of a temperature control valve according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of the trim valve of FIG. 1; FIG. 3 is an enlarged view of a portion A of FIG. 2; FIG. 4 is a schematic cross-sectional view of the thermostat valve T1 and T2 shown in FIG. 1 with the ports open; FIG. 5 is a schematic cross-sectional view of the thermostat valve T1 of FIG. 1 with the C1 port open; FIG. 6 is a schematic cross-sectional view of the thermostat valve T1 and C1 ports and T1 and T2 ports of FIG. 1 being simultaneously open; FIG. 8 is a schematic three-dimensional view of a thermal element according to one embodiment of the present invention; FIG. 9 is a schematic cross-sectional view of the thermal element of FIG. 8.
The invention provides a temperature regulating valve which comprises a valve body 1, wherein a valve cavity and a thermal element 2 arranged in the valve cavity are arranged in the valve body 1. The valve body 1 is provided with at least three interfaces to communicate with the outside, that is, the valve body 1 communicates an external pipeline with the inside of the valve cavity through the three interfaces. The upper end of the valve cavity can be provided with a mounting hole coaxial with the thermal actuator 2, and the thermal actuator 2 and other parts in the valve body 1 can be assembled in the valve cavity from the mounting hole. An end cap 6 may be provided at the mounting hole to effect a seal. The specific structure of the end cap 6 will be described later.
The invention takes a temperature regulating valve with four interfaces as an example to continue the technical proposal, and the four interfaces are respectively: a first interface T1, a second interface C1, a third interface T2, and a fourth interface C2. The four ports are all communicated with the valve cavity, wherein the first port T1 and the second port C1 are disposed at opposite positions of the valve body 1, and the third port T2 and the fourth port C2 are disposed at opposite positions of the valve body 1.
It should be noted that the third port T2 or the fourth port C2 may not be provided, and in this embodiment, the fourth port C2 is provided to facilitate the piping connection and installation of the thermostat valve.
The valve cavity is a cavity formed by a series of drilling holes on the valve body 1, and the cavity is internally provided with parts.
The temperature regulating valve provided by the invention can be further provided with a pressure relief ring 5 in the valve cavity, the pressure relief ring and the valve body are axially sealed in a sliding manner, the pressure relief ring 5 is provided with a first valve port 1a, a second elastic part 4 is arranged between the pressure relief ring 5 and the bottom wall of the valve cavity, one end of the second elastic part 4 is in contact with the pressure relief ring 5, the other end of the second elastic part 4 is in contact with the bottom wall of the valve cavity, a first elastic part 3 is further arranged between the thermal actuator 2 and the pressure relief ring, one end of the first elastic part 3 is in contact with the thermal actuator 2, and the other end of the first elastic part 3 is in contact with the pressure relief ring 5.
The thermostatic valve opens or closes the first port 1a through the thermal element 2, that is, the thermal element 2 can close or open the first port 1a to disconnect (not connect) or connect the first port T1 and the second port C1.
When the first valve port 1a is opened, the first elastic component 3 is in a compressed state, the second elastic component 4 is in a natural expansion state, the initial elastic deformation force of the second elastic component 4 is greater than or equal to the elastic force generated by the first elastic component 3 when the first valve port 1a is closed, and when the thermal actuator 2 is expanded by heat, the thermal actuator 2 moves downwards first to compress the first elastic component 3 until the first valve port 1a is closed.
The initial elastic deformation force is a force to which the elastic member is subjected when it is deformed from a factory state.
When the first valve port 1a is closed, the thermal element 2 pushes the pressure relief ring to compress the second elastic member 4 to move downwards, and at this time, the first port T1 is not communicated with the third port T2.
The initial elastic deformation force of the second elastic member 4 is also a force to which the spring is subjected when it is deformed from a factory state. The above-mentioned range of difference values "slightly greater" can be determined according to the functional description of the above-mentioned valve.
Wherein the second elastic member 4 has a greater stiffness than the first elastic member 3. Thus, when the temperature of the internal medium rises and the thermal element 2 moves downwards, the first elastic member 3 is compressed to a certain extent, and then the second elastic member 4 is compressed. As designed above, the temperature regulating valve can have a buffer function inside, namely when the thermal actuator 2 expands due to heat, the thermal actuator 2 can be damaged if the thermal actuator 2 continues to expand after the first valve port 1a is closed and does not move downwards, and the thermal actuator 2 can be prevented from being damaged by setting the buffer function and then moving downwards to compress the second elastic component 4 after the first valve port 1a is closed.
In a specific embodiment, at least a part of the outer wall of the thermal actuator 2 is in sliding seal with the inner wall of the first valve port 1a, the initial elastic deformation force of the second elastic component 4 is greater than the elastic force generated by the first elastic component 3 when the first valve port 1a is closed, when the outer wall of the thermal actuator 2 is in sliding seal with the inner wall of the first valve port 1a, the first valve port 1a is closed, and when the first valve port 1a is closed and the fluid pressure in the valve chamber is greater than the initial elastic deformation force or elastic force of the second elastic component 4 when the first valve port 1a is closed, the fluid medium pushes the pressure relief ring to compress the second elastic component 4 to move downwards, so that the first port T1 is communicated with the third port T2.
Thus, the buffering function is realized through sliding fit, meanwhile, the initial elastic deformation force of the second elastic component 4 can be set according to the pressure relief pressure, and the degree of association with the first elastic component 3 is further reduced (the buffering function is realized through the first elastic component 3, and the pressure relief ring does not need to act when buffering.
Specifically, in one particular embodiment the stiffness of the first and second resilient members 3, 4 may be selected by the following formula.
Referring to fig. 4, when the fluid medium is in a low temperature state, the first elastic component 3 and the second elastic component 4 are in an initial working state, and at this time, the forces of the two springs applied to the thermal element are: fGo back to=FDrain device
Wherein, FGo back toActing on the thermal element by a first elastic member, FDrain deviceIs the force of the second elastic component on the thermal element.
Referring to fig. 5, when the fluid medium is at a high temperature, the first elastic member 3 is at a large working height, and the second elastic member 4 is compressed by a portion, but does not reach the maximum working height. At this time, FGo back to≥PBack of bodyS1; wherein P back represents the pressure difference across C1 and C2 and S1 represents the upper cross-sectional area of the fluid thermal element. F Drain device2+ Pback S2S 2 indicates the area of the bleed ring that the fluid acts on at this time
Referring to fig. 6, fig. 6 shows a high temperature decompression stage, in which the first elastic member 3 and the second elastic member 4 are both compressed to a maximum working state, FDrain device≈RP*S2+FGo back to(ii) a Wherein RP is set according to the requirements of clients.
Wherein, according to the known heatThe total opening stroke x of the movable element can calculate the compressed height △ x of the pressure relief spring, and satisfies FDrain device=FDrain device+kDrain device*△x。
The thermal actuator 2 may include a push rod and a thermal actuator body 22, the push rod is composed of a heat sensitive substance, and the heat sensitive substance is capable of generating a volume change with a change in temperature, so that the push rod is extended or shortened, thereby pushing the thermal actuator body 22 to move up and down along the valve chamber.
Specifically, the first port T1 and the third port T2 have a second port 1b on the flow channel, and the upper end of the thermal element 2 can be communicated with or close the second port 1 b.
The working principle of the temperature regulating valve provided by the invention is as follows: when the temperature of the fluid medium is low, the thermal actuator 2 (thermal actuator body 22) closes the second valve port 1b, the first port T1 is disconnected from the second port C1, the first port 1a is opened, and the first port T1 and the third port T2 are communicated through a passage (first port 1a) formed between the thermal actuator 2 and the relief ring 5.
When the temperature of the fluid medium is high, the thermal element 2 compresses the first elastic component 3 to move towards the pressure relief ring 5, the second port 1b is opened, the first port T1 is communicated with the second port C1 through the second port 1b, and the first port 1a is gradually closed.
Specifically, the maximum outer diameter of the thermal element 2 may be smaller than the outer diameter of the pressure relief ring 5, the fitting section 11 of the valve cavity and the pressure relief ring 5 in a sliding seal manner has a certain length, when the first valve port 1a is closed and the fluid pressure in the valve cavity is greater than the elastic force of the second elastic component 4 at this time (for example, when the temperature of the fluid medium is higher and the second port C1 is blocked), the fluid medium pushes the pressure relief ring 5 to compress the second elastic component 4 to move downward, so that the thermal element 2 is separated from the pressure relief ring 5, and a channel for communicating the first port T1 with the third port T2 is formed between the thermal element 2 and the pressure relief ring 5, that is, the first port T1 and the third port T2 are communicated. Thus, the pressure relief inside the valve cavity is realized.
As can be seen from the above description, when the thermostatic valve of the present invention operates at a high temperature, because the rigidity of the second elastic member 4 is greater than that of the first elastic member 3, the thermal element 2 compresses the first elastic member 3 first, the thermal element 2 moves downward, the second valve port 1b is opened, the first port T1 and the second port C1 are communicated until the thermal element 2 moves to abut against the pressure relief ring 5, the passage (the first valve port 1a) between the thermal element 2 and the pressure relief ring 5 is closed, and the first port T1 and the third port T2 are completely disconnected.
When the internal pressure of the temperature regulating valve continues to rise, the pressure of the fluid medium on the pressure relief ring 5 also increases, and when the pressure increases to a certain extent, the pressure relief ring 5 and the first elastic component 3 move downwards together, the pressure relief ring 5 moves downwards and is far away from the thermal element 2, so that the first valve port 1a is opened, and the first port T1 and the third port T2 are communicated again.
Compared with the prior art that the thermal element 2 is matched with the fixed block to realize the connection or disconnection of the first connector T1, under the condition that the normal operation of the temperature regulating valve is realized, the thermal element 2 is directly matched with the pressure relief ring 5 to realize the connection or disconnection of the flow passage between the first connector T1 and the third connector T2, the parts in the valve body 1 are reduced, and the factors causing the leakage in the valve body 1 are reduced.
Further, the valve chamber also has a spring mounting section 12, and the diameter of the spring mounting section 12 may be approximately equal to or slightly larger than the maximum outer diameter of the second elastic member 4. The radial dimension of the spring mounting section 12 is smaller than that of the matching section 11, and the lower end part of the second elastic component 4 is supported on the step surface of the spring mounting section 12 connected with the valve cavity.
Namely, a spring mounting section 12 for radially limiting the lower end part of the second elastic component 4 is arranged in the valve cavity, and the spring mounting section 12 not only plays a role in compression guiding but also plays a role in mounting and positioning, so that the mounting efficiency and the mounting accuracy are improved.
Referring to fig. 7, fig. 7 is a schematic cross-sectional view of a pressure relief ring according to an embodiment of the invention.
The pressure relief ring 5 in each of the above embodiments may include a top wall and a side wall, the side wall is in sliding seal with the valve body 1, the top wall is provided with a first valve port 1a, and a lower end of the thermal element body 22 is in abutting fit with the pressure relief through hole to communicate with or close the first valve port 1 a. The roof forms the installation cavity with the lateral wall, and the installation cavity is located to the upper end of second elastomeric element 4, and the lower surface that leans on the roof is supported to the up end of second elastomeric element 4.
In the above embodiment, the side wall of the pressure relief ring 5 is in contact with the valve body 1, and the contact area between the side wall and the valve body is large, so that the sealing reliability is improved. And the top wall and the side wall of the pressure relief ring 5 form an installation cavity of the second elastic component 4, which is beneficial to increasing the stability of the second elastic component 4 during installation and working expansion.
The peripheral wall of the first valve port 1a in the above embodiments may further be provided with an inclined chamfer, and the lower end of the thermal actuator body 22 is provided with a circular arc, and the inclined chamfer and the circular arc are circumferentially matched to abut against the line for sealing, so that the line sealing performance is better.
As described above, the valve body 1 is provided with the mounting hole coaxial with the thermal actuator 2, and each component in the valve body 1 is mounted inside the valve cavity from the mounting hole, and inevitably, the radial dimension of the mounting hole is larger than or equal to the maximum outer diameter of the valve cavity.
Referring to fig. 10 and 11, fig. 10 is a three-dimensional perspective view of an end cap of the thermostatic valve shown in fig. 1; FIG. 11 is a cross-sectional schematic view of the end cap of FIG. 10.
The mounting hole is coaxial with the thermal element 2, and an end cover 6 is fixed inside the mounting hole. One end of the push rod is arranged in the end cover 6, and the other end of the push rod is connected with the thermal element body 22. As shown in fig. 11, the end cap 6 includes a sealing section 61 and a mounting cavity 63, the sealing section 61 is mounted inside the mounting hole, and the upper end of the push rod is mounted inside the mounting cavity 63. The lower end of the end cover 6 extends into the valve cavity, the second valve port 1b is formed at the lower end of the end cover 6, and a channel 6a for communicating the second valve port 1b with the second interface C1 is formed on the end cover 6.
The second valve port 1b is formed on the end cover 6, which is beneficial to simplifying the internal structure of the valve cavity and reducing the processing technology of the valve cavity.
As can be seen from the figure, the mounting hole, the matching section 11 of the valve cavity matched with the pressure relief ring 5 and the spring mounting cavity 12 are coaxially arranged, each section forms a stepped hole, and the diameter of the stepped hole is gradually reduced from top to bottom.
Specifically, the lower end surface of the end cover 6 is provided with a groove 64, the opening of the groove 64 is the second valve port 1b, the upper end surface of the thermal element body 22 is provided with a boss 23 which is matched and abutted with the bottom wall of the groove, and the side wall of the groove 64 is provided with a channel which is communicated with the inner cavity of the groove and the second port C1. Specifically, the recess bottom wall may further have a bent edge 62, with the thermal element body 22 abutting against the bent edge 62. This increases the area of the seal between the body 22 of the thermal element and the bottom wall of the recess.
The first elastic member 3 may be a coil spring, which is sleeved on the periphery of the thermal actuator body 22, and two end portions of the coil spring respectively abut against the lower surface of the boss and the pressure relief ring 5. This places the thermal actuator body 22 completely inside the coil spring, providing good centering and stability of the thermal actuator body 22.
And as can be seen from the above description, the first elastic component 3 is arranged outside the end cover 6, so that the internal structure of the end cover 6 is simplified, the internal space can be reduced, the valve body 1 can be miniaturized, and the manufacturing cost can be greatly reduced.
When the temperature regulating valve is assembled, the first elastic component 3, the pressure relief ring 5, the second elastic component 4, the thermal actuator 2 and the sealing end cover which are positioned in the valve body 1 can be assembled outside the valve body 1, and then the assembled whole body is installed in the valve cavity.
Of course, the valve body can be installed inside the valve cavity from bottom to top.
The foregoing is considered as illustrative and not restrictive in any way, and the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can now make numerous changes and modifications to the disclosed embodiments, and equivalents thereof, without departing from the scope of the invention as set forth in the claims below. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims (10)

1. A temperature regulating valve comprises a valve body with a valve cavity arranged inside and a thermal element arranged in the valve cavity; the valve body is at least provided with three interfaces communicated with the outside, and the three interfaces comprise a first interface, a second interface and a third interface; the valve is characterized in that a pressure relief ring is further arranged in the valve cavity, the pressure relief ring and the valve body are axially sealed in a sliding manner, the pressure relief ring is provided with a first valve port, a second elastic component is arranged between the pressure relief ring and the bottom wall of the valve cavity, one end of the second elastic component is in contact with the pressure relief ring, the other end of the second elastic component is in contact with the bottom wall of the valve cavity, a first elastic component is further arranged between the thermal actuator and the pressure relief ring, one end of the first elastic component is in contact with the thermal actuator, and the other end of the first elastic component is in contact with the pressure relief ring;
the thermal element opens or closes the first valve port, and the first port is communicated or not communicated with the third port;
when the first valve port is opened, the first elastic component is in a compressed state, the second elastic component is in a natural telescopic state, the initial elastic deformation force of the second elastic component is greater than or equal to the elastic force generated by the first elastic component when the first valve port is closed, and when the thermal actuator expands under heat, the thermal actuator moves downwards to compress the first elastic component until the first valve port is closed;
wherein the initial elastic deformation force refers to the force to which the elastic component is subjected when the elastic component is deformed from a factory state.
2. The temperature regulating valve according to claim 1, wherein the mating section of said valve chamber and said pressure relief ring having a sliding seal has a length, when said first port is closed and the fluid pressure in said valve chamber is greater than the elastic force of said second elastic member at that time, said fluid medium pushes said pressure relief ring to compress said second elastic member to move downward, and said first port and said third port are connected to each other at that time.
3. A temperature regulating valve according to claim 2, wherein the initial elastic deformation force of the second elastic member is equal to the elastic force of the first elastic member when the first valve port is closed, or the initial elastic deformation force of the second elastic member is slightly larger than the elastic force of the first elastic member when the first valve port is closed, and when the first valve port is closed, the thermal element pushes the pressure relief ring to compress the second elastic member to move downwards, and the first port is not communicated with the third port.
4. A thermostat valve according to claim 1, wherein at least a portion of an outer wall of the thermal element is slidably sealed with an inner wall of the first port, an initial elastic deformation force of the second elastic member is greater than an elastic force of the first elastic member generated when the first port is closed, the first port is closed when the outer wall of the thermal element is slidably sealed with the inner wall of the first port, and the fluid medium pushes the pressure relief ring to compress the second elastic member to move downward when the first port is closed and the fluid pressure in the valve chamber is greater than the initial elastic deformation force or the elastic force of the second elastic member when the first port is closed, so that the first port and the third port are connected to each other.
5. The thermostat valve as claimed in claim 1, wherein the flow passages of the first port and the second port have a second port, and the second port is opened or closed by the thermal element, and the first port and the second port are connected or not connected; when the first valve port is opened, the thermal element closes the second valve port; the second valve port opens when the thermal element moves downward.
6. The thermostat valve as claimed in claim 2, wherein said valve chamber further has a spring mounting section having a radial dimension smaller than that of said fitting section, and a lower end portion of said second elastic member is supported on a step surface formed by a lower end of said spring mounting section and said valve chamber.
7. A thermostat valve according to claim 6 wherein said pressure relief ring includes a top wall and a side wall, said side wall being in sliding sealing relation with said valve body, said top wall having said first port formed thereon; the top wall and the side wall form an installation cavity, the upper end part of the second elastic component is arranged in the installation cavity, the upper end surface of the second elastic component abuts against the top wall, the peripheral wall of the first valve port is provided with an inclined chamfer, the lower end part of the thermal actuator is provided with a circular arc surface, and the inclined chamfer and the circular arc surface are circumferentially matched to abut against a line for sealing.
8. The thermostat valve as claimed in claim 5, wherein the upper end of the valve body is further provided with a mounting hole coaxial with the thermal element, the mounting hole is communicated with the valve cavity, an end cover is fixed in the mounting hole, and the radial dimension of the mounting hole is larger than or equal to the maximum outer diameter of the valve cavity;
the thermal actuator comprises a push rod and a thermal actuator body, one end of the push rod is installed in the end cover, and the other end of the push rod is connected with the thermal actuator body; the lower end part of the end cover extends to the interior of the valve cavity, the second valve port is formed in the end cover, and a channel for communicating the second valve port with the second port is formed in the end cover.
9. A thermostatic valve according to claim 8 wherein said end cap has a recess formed in a lower end thereof, said recess opening to said second port, said thermal element body has a boss on an upper end thereof for engaging against a bottom wall of said recess, and said recess has a sidewall provided with a passage communicating an interior of said recess with said second port.
10. The temperature regulating valve according to claim 1, wherein said valve body is further provided with a fourth port communicating with the outside, and said fourth port is communicated with said third port.
CN201710379386.5A 2017-05-25 2017-05-25 Temperature regulating valve Active CN108930777B (en)

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CN102954228A (en) * 2011-08-23 2013-03-06 通用汽车环球科技运作有限责任公司 Thermostatic valve assembly
WO2017001302A1 (en) * 2015-07-02 2017-01-05 Robert Bosch Gmbh An injector having a shape memory spring

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CN102954228A (en) * 2011-08-23 2013-03-06 通用汽车环球科技运作有限责任公司 Thermostatic valve assembly
CN102312997A (en) * 2011-09-08 2012-01-11 浙江三花汽车零部件股份有限公司 Vehicle gear box temperature regulator
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