Cooling liquid multi-way valve of integrated executing mechanism

Abstract

The invention relates to a cooling liquid multi-way valve of an integrated executing mechanism. A valve element is arranged in an inner cavity formed by a shell and a valve cover, a motor stator is integrated in the valve cover, and a motor rotor is integrated in the valve element; a first positioning column is arranged in the center of an inner cavity of the valve deck in the axial direction in a protruding mode and sleeved with a pre-tightening spring, a first positioning groove used for containing the pre-tightening spring and used for being matched with the first positioning column is formed in the position, opposite to the first positioning column, of the valve element, the top of the pre-tightening spring abuts against the valve deck, and the bottom of the pre-tightening spring abuts against the valve element. The valve element is matched in the sealing piece, a second positioning column is arranged in the center of the groove bottom of the shell in the axial direction in a protruding mode, and a second positioning groove used for being matched with the second positioning column is formed in the bottom face, opposite to the second positioning column, of the valve element. The shell is provided with a plurality of cooling liquid connectors, holes are formed in the sealing piece in the radial direction, and flow channels are formed in the valve element corresponding to the cooling liquid connectors in the shell and used for being communicated with the different cooling liquid connectors in the shell. A large-torque actuator does not need to be arranged, the valve element rotating speed is high, and abrasion of a sealing piece is small.

Description

Technical Field

[0001] The present invention relates to a coolant multi-way valve integrated with an actuator. Background Art

[0002] The multi-way valve includes a housing, a valve core, a valve cover, a seal, and an actuator. The seal is installed between the housing and the valve core, and a pre-tightening pressure is generated through interference fit to achieve sealing, that is, the thickness of the unsealed seal is greater than the gap between the housing and the valve core. When the valve core rotates, this pre-tightening pressure will cause a relatively high friction force between the valve core and the seal, resulting in relatively high wear of the seal.

[0003] When the housing and the valve core undergo thermal deformation due to changes in the coolant temperature, the gap between them will change. When the gap increases, it will cause the pre-tightening pressure of the seal to decrease, thereby affecting the sealing performance; when the gap decreases, it will cause the pre-tightening pressure and friction force to be too high, and the sealing performance is sensitive to temperature.

[0004] To achieve the rotation of the valve core, a large-torque actuator (including a motor and a set of gear reduction mechanisms) needs to be equipped to overcome the high torque brought by the high friction force between the valve core and the seal, which greatly increases the cost and weight, and the actuator will occupy additional space.

[0005] Due to the use of a gear reduction mechanism to generate a large rotational torque, the rotation speed of the valve core is low, the connection mode switching is slow, and the rotation speed of the valve core is slow.

[0006] Not only does the friction between the valve core and the seal generate noise, but the motor and the gear reduction mechanism also generate noise during operation. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a coolant multi-way valve integrated with an actuator.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] The coolant multi-way valve integrated with an actuator is characterized in that it includes a housing, a valve cover integrally connected to the housing, a motor stator, and a motor rotor. The valve core is placed in the inner cavity formed by the housing and the valve cover. The motor stator is integrated into the valve cover. Correspondingly, the motor rotor is integrated into the valve core. A positioning post 1 protrudes axially from the center of the inner cavity of the valve cover. A pre-tightening spring is sleeved on the positioning post 1. A positioning groove 1 for accommodating the pre-tightening spring and for cooperating with the positioning post 1 is provided on the valve core opposite thereto. The top of the pre-tightening spring abuts against the valve cover, and the bottom abuts against the valve core. A seal is fitted in the groove of the housing. The valve core is fitted in the seal. A positioning post 2 protrudes axially from the center of the bottom of the groove of the housing. A positioning groove 2 for cooperating with the positioning post 2 is provided on the bottom surface of the valve core opposite thereto. The valve core can rotate with the positioning post 1 and the positioning post 2 as axes;

[0010] The housing is provided with a plurality of coolant interfaces, the seal is radially perforated corresponding to the coolant interfaces on the housing, and the valve core is provided with a flow channel for connecting different coolant interfaces on the housing. The flow channel of the valve core, the holes of the seal and different coolant interfaces of the housing form one or several closed coolant pipeline channels.

[0011] Further, in the above-mentioned coolant multi-way valve of the integrated actuator, the groove of the housing is in the shape of an inverted frustum of a cone. Correspondingly, the seal is also in the shape of an inverted frustum of a cone, and the part of the valve core that cooperates with the seal is also in the shape of an inverted frustum of a cone.

[0012] Further, in the above-mentioned coolant multi-way valve of the integrated actuator, the motor stator is integrally molded and buried inside the valve cover. Correspondingly, the motor rotor is integrally molded and buried inside the valve core.

[0013] Further, in the above-mentioned coolant multi-way valve of the integrated actuator, a sealing strip is convexly provided on the inner wall of the seal, which contacts the outer wall of the valve core to form a seal.

[0014] Further, in the above-mentioned coolant multi-way valve of the integrated actuator, the outer wall of the seal is closely attached to the inner wall of the groove of the housing to form a seal.

[0015] Further, in the above-mentioned coolant multi-way valve of the integrated actuator, the edge of the valve cover is hermetically connected to the housing by a threaded connection method or a fusion welding method.

[0016] Further, in the above-mentioned coolant multi-way valve of the integrated actuator, the positioning post one is fitted in the positioning groove one, the positioning post two is fitted in the positioning groove two, the upward displacement of the valve core is restricted by the bottom surface of the positioning post one, and the downward displacement of the valve core is restricted by the top surface of the positioning post two.

[0017] Compared with the prior art, the present invention has remarkable advantages and beneficial effects, which are specifically reflected in the following aspects:

[0018] ① The present invention realizes that the pre-tightening pressure of the seal automatically decreases when the valve core rotates, reducing the wear of the seal. The wear of the seal is small, solving the problem that the sealing performance decreases with wear; the pre-tightening pressure automatically increases when the valve core stops rotating, maintaining high sealing performance;

[0019] ② An axial force is generated by the pre-tightening spring to form a radial pre-tightening pressure on the contact surface between the conical valve core and the seal. The pre-tightening spring applies a continuous and constant pre-tightening pressure to the seal, and the sealing performance is not sensitive to temperature;

[0020] ③Since the valve core is in a state of low pre-tightening pressure and low resistance to torsion during rotation, the motor can rotate the valve core without using a gear reduction mechanism and does not need to be equipped with a high-torque actuator. Moreover, the motor is integrated in the valve body and the valve core, realizing the miniaturization of the multi-way valve.

[0021] ④Since there is no gear reduction mechanism and the rotation torque is low, the valve core can be rotated at a faster speed. The valve core rotates quickly, realizing the switching of connection modes.

[0022] ⑤When the valve core and the seal rotate, the pre-tightening pressure decreases, and the noise generated by friction is low. The rotation of the valve core is realized by a brushless motor and there is no gear set, so the noise is low.

[0023] Other features and advantages of the present invention will be described in the following specification. And, partly, they will become obvious from the specification, or can be understood by implementing the specific embodiments of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification and the drawings. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 : Schematic diagram of the disassembled structure of the present invention;

[0026] Figure 2 : Schematic diagram of the assembled structure of the present invention;

[0027] Figure 3 : Schematic diagram of the non-operating state of the motor;

[0028] Figure 4 : Schematic diagram of the operating state of the motor. Detailed Description of the Embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present invention, orientation terms and sequence terms are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] As Figures 1-2 shown, the coolant multi-way valve of the integrated actuator includes a housing 7, a valve cover 1 integrally connected to the housing 7, a motor stator 2, and a motor rotor 4. A valve core 5 is placed in the inner cavity formed by the housing 7 and the valve cover 1. The motor stator 2 is integrally molded and buried inside the valve cover 1. Correspondingly, the motor rotor 4 is integrally molded and buried inside the valve core 5. A positioning post 1 8 protrudes axially from the center of the inner cavity of the valve cover 1. A preloading spring 3 is sleeved on the positioning post 1 8. A positioning groove 1 9 for accommodating the preloading spring 3 and for cooperating with the positioning post 1 8 is provided on the valve core 5 opposite thereto. The top of the preloading spring 3 abuts against the valve cover 1, and the bottom abuts against the valve core 5. The preloading spring 3 is always in a compressed state, and the valve core 5 is always subjected to a downward axial force by the preloading spring. The positioning post 1 8 is fitted in the positioning groove 1 9. The groove of the housing 7 is in the shape of an inverted frustum of a cone. Correspondingly, the seal 6 is also in the shape of an inverted frustum of a cone. The part of the valve core 5 that cooperates with the seal 6 is also in the shape of an inverted frustum of a cone. The seal 6 is fitted in the groove of the housing 7, and the valve core 5 is fitted in the seal 6. A sealing strip protrudes from the inner wall of the seal 6 and contacts the outer wall of the valve core 5 to form a seal. The outer wall of the seal 6 is closely attached to the inner wall of the groove of the housing 7 to form a seal. A positioning post 2 10 protrudes axially from the center of the bottom of the groove of the housing 7. A positioning groove 2 11 for cooperating with the positioning post 2 10 is provided on the bottom surface of the valve core 5 opposite thereto. The positioning post 2 10 is fitted in the positioning groove 2 11. The valve core 5 can rotate about the positioning post 1 8 and the positioning post 2 10 as axes. The upward displacement of the valve core 5 is restricted by the bottom surface of the positioning post 1 8, and the downward displacement is restricted by the top surface of the positioning post 2 10.

[0032] The housing 7 is provided with a plurality of coolant interfaces. The seal 6 is radially perforated corresponding to the coolant interfaces on the housing 7. The valve core 5 is provided with a flow channel for connecting different coolant interfaces on the housing 7. The flow channel of the valve core 5, the holes of the seal 6 and different coolant interfaces of the housing 7 form one or several closed coolant pipeline channels.

[0033] The edge of the valve cover 1 is hermetically connected to the housing 7 by means of threaded connection or fusion welding to achieve the sealing of the coolant from the outside.

[0034] Such as Figure 3 In State 1, when the valve core 5 does not need to rotate, the motor is not powered on, and the valve core 5 is pressed down, and the contact surface between the seal 6 and the valve core 5 is the largest. Specifically, the motor stator 2 is not powered on, and the valve core 5 is pressed down by the preloading spring 3 until it is limited by the positioning post two 10 on the housing 7. The gap between the valve core 5 and the housing 7 becomes smaller, and the contact area between the sealing strip on the seal 6 and the valve core 5 is the largest. The centers of the motor stator 2 and the motor rotor 4 are not at the same height, and there is an eccentric distance between them. Because the motor stator 2 is not powered on, there is no or only a weak magnetic attraction between the motor stator 2 and the motor rotor 4 and it is much lower than the force of the preloading spring 3.

[0035] Such as Figure 4 In State 2, when the valve core 5 needs to rotate, the motor is powered on, and the valve core 5 is lifted up, and the contact surface between the seal 6 and the valve core 5 becomes smaller, and the friction force decreases, and a smaller torque can be used to realize the rotation of the valve core. Specifically, when the motor stator 2 is powered on, the magnetic attraction between the motor rotor 4 and the motor stator 2 increases and exceeds the preloading pressure of the preloading spring 3. The valve core 5 rises until the eccentric distance between the motor stator 2 and the motor rotor 4 is eliminated. The gap between the valve core 5 and the housing 7 becomes larger, and the contact area between the sealing strip on the seal 6 and the valve core 5 decreases, and the friction force decreases. The torque value for realizing the rotation of the valve core 5 becomes smaller. The present invention can control the rotation of the motor rotor 4 and the valve core 5 without a gear reduction mechanism.

[0036] During rotation, although the contact area between the seal 6 and the valve core 5 decreases, they still remain in contact all the time; and the valve core 5 can quickly complete rotation and return to State 1 under low torque resistance, so the impact on the sealing performance is very small.

[0037] The actuator only contains the motor stator 2 and the motor rotor 4, which is integrated in the multi-way valve and has a small volume.

[0038] An axial force is generated by the preloading spring 3 to form a radial preloading pressure on the contact surface between the conical valve core and the seal.

[0039] In summary, the present invention realizes that the pre-tightening pressure of the seal automatically decreases when the valve core rotates, reducing the wear of the seal. The wear of the seal is small, solving the problem that the sealing performance decreases with wear; the tightening pressure automatically increases when the valve core stops rotating, maintaining high sealing performance.

[0040] A continuous and constant pre-tightening pressure is applied to the seal through a pre-tightening spring, and the sealing performance is not sensitive to temperature.

[0041] Since the valve core is in a state of low pre-tightening pressure and low torque resistance when rotating, the motor can realize the rotation of the valve core without using a gear reduction mechanism and does not need to be equipped with a high-torque actuator; moreover, the motor is integrated in the valve body and the valve core, realizing the miniaturization of the multi-way valve.

[0042] Due to the absence of a gear reduction mechanism and low rotational torque, the valve core can rotate at a faster speed. The valve core rotates quickly, realizing the switching of connection modes.

[0043] When the valve core and the seal rotate, the pre-tightening pressure decreases, and the noise generated by friction is low; the rotation of the valve core is realized by a brushless motor and there is no gear set, so the noise is low.

[0044] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or replacements, which should all be covered within the protection scope of the present invention.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

Claims

1. The coolant multi-way valve integrated with an actuator, characterized in that: It includes a housing (7), a valve cover (1) integrally connected to the housing (7), a motor stator (2), and a motor rotor (4). A valve core (5) is placed in the inner cavity formed by the housing (7) and the valve cover (1). The motor stator (2) is integrated into the valve cover (1). Correspondingly, the motor rotor (4) is integrated into the valve core (5). A first positioning post (8) protrudes axially from the center of the inner cavity of the valve cover (1). A pre-tightening spring (3) is sleeved on the first positioning post (8). A first positioning groove (9) for accommodating the pre-tightening spring (3) and for cooperating with the first positioning post (8) is provided on the valve core (5) opposite thereto. The top of the pre-tightening spring (3) abuts against the valve cover (1), and the bottom abuts against the valve core (5). A sealing member (6) is fitted in the groove of the housing (7). The valve core (5) is fitted in the sealing member (6). A second positioning post (10) protrudes axially from the center of the bottom of the groove of the housing (7). A second positioning groove (11) for cooperating with the second positioning post (10) is provided on the bottom surface of the valve core (5) opposite thereto. The valve core (5) can rotate with the first positioning post (8) and the second positioning post (10) as axes. Multiple coolant interfaces are provided on the housing (7). Radial holes are provided on the sealing member (6), corresponding to the coolant interfaces on the housing (7). A flow channel is provided on the valve core (5) to connect different coolant interfaces on the housing (7). The flow channel of the valve core (5), the holes of the sealing member (6), and different coolant interfaces of the housing (7) form one or several closed coolant pipeline channels.

2. The coolant multi-way valve of the integrated actuator according to claim 1, characterized in that: The groove of the housing (7) is in the shape of an inverted frustum of a cone. Correspondingly, the sealing member (6) is also in the shape of an inverted frustum of a cone. The part of the valve core (5) that cooperates with the sealing member (6) is also in the shape of an inverted frustum of a cone.

3. The coolant multi-way valve of the integrated actuator according to claim 1, wherein: The motor stator (2) is formed by overmolding and buried inside the valve cover (1). Correspondingly, the motor rotor (4) is formed by overmolding and buried inside the valve core (5).

4. The coolant multi-way valve of the integrated actuator according to claim 1, characterized in that: Sealing strips protrude from the inner wall of the sealing member (6) and contact the outer wall of the valve core (5) to form a seal.

5. The coolant multi-way valve of the integrated actuator according to claim 1, characterized in that: The outer wall of the sealing member (6) closely adheres to the inner wall of the groove of the housing (7) to form a seal.

6. The coolant multi-way valve of the integrated actuator according to claim 1, characterized in that: The edge of the valve cover (1) is hermetically connected to the housing (7) by means of threaded connection or welding.

7. The coolant multi-way valve of the integrated actuator according to claim 1, characterized in that: The first positioning post (8) is fitted in the first positioning groove (9), and the second positioning post (10) is fitted in the second positioning groove (11). The upward displacement of the valve core (5) is restricted by the bottom surface of the first positioning post (8), and the downward displacement of the valve core (5) is restricted by the top surface of the second positioning post (10).

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