A self-cooling supercharger actuator

Abstract

This invention provides a self-cooling booster actuator, comprising a first housing, an actuator body housed within the first housing, and a second housing, a rubber diaphragm housed within the second housing, and a push rod. A first cooling chamber is formed between the second and first housings. The first housing has a first air inlet and a first air outlet, with a first air inlet hole and a first air outlet hole. The second housing includes a second air inlet and a second air outlet, with a second air inlet hole and a second air outlet hole. The rubber diaphragm divides the inner cavity of the second housing into a second cooling chamber and a third cooling chamber. This structure not only provides external heat insulation for the actuator body but also allows for internal cooling through airflow, reducing the heat within the actuator cavity and thus lowering the actuator temperature. Furthermore, the structure is simple and easy to manufacture and install.

Description

Technical Field

[0001] This invention relates to the field of turbocharger actuator technology, and in particular to a self-cooling turbocharger actuator. Background Technology

[0002] In engine technology, the turbocharger is a crucial performance component, and the actuator is a key and easily damaged part of the turbocharger. Actuator failure first causes turbocharger failure, which in turn affects engine output power.

[0003] In recent years, due to advancements in engine technology, the power output of diesel and gasoline engines has increased, and engine exhaust temperatures have also risen. Furthermore, the adoption of aftertreatment technologies such as SCR and DPF has led to increasingly compact engine designs, resulting in higher heat radiation near the engine block and consequently, higher requirements for the high-temperature resistance of various engine components.

[0004] In the prior art, cooling is usually achieved by adding coolant, or by referring to the turbocharger actuator heat shield disclosed in the published Chinese patent CN204532547U, which reduces the heat load on the turbocharger actuator by adding a heat shield between the actuator and the actuator bracket. However, it can only isolate heat from the outside and cannot reduce the heat inside the actuator, thus causing the internal components to be damaged due to high temperature.

[0005] Therefore, it is necessary to propose a self-cooled turbocharger actuator to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0006] The main objective of this invention is to provide a self-cooling turbocharger actuator to solve the problem that existing technologies can only isolate heat from the outside and cannot reduce the heat inside the actuator, thus causing internal components to be damaged due to high temperatures.

[0007] To achieve the above objectives, the present invention provides a self-cooling turbocharger actuator, comprising a first housing and an actuator body housed within the first housing. The actuator body includes a second housing, a rubber diaphragm housed within the second housing, a push rod, and a spring; wherein,

[0008] A first cooling chamber is formed between the second outer casing and the first outer casing;

[0009] The first housing has a first air inlet end and a first air outlet end disposed opposite to each other along its own extending direction; the first air inlet end has a first air inlet through hole communicating with the first cooling chamber, and the first air outlet end has a first air outlet through hole for the push rod to pass through and for exhausting air.

[0010] The second housing includes a second air inlet and a second air outlet disposed opposite to each other along its own extending direction; the second air inlet has a second air inlet hole, and the second air outlet has a second air outlet hole through which the push rod passes and for exhausting air; the diameters of the first air outlet hole and the second air outlet hole are larger than the outer diameter of the push rod;

[0011] The outer periphery of the rubber diaphragm is fixedly connected to the inner wall of the second housing, and the rubber diaphragm divides the inner cavity of the second housing into a second cooling chamber near the first air intake end and a third cooling chamber away from the first air intake end.

[0012] Preferably, the first air inlet end is provided with an air nozzle protruding outward along the axial direction of the first housing, and the air nozzle is in communication with the first air inlet hole.

[0013] Preferably, the first air inlet and the second air inlet are spaced apart.

[0014] Preferably, the actuator body further includes two positioning connecting rods built into the second housing. The first air outlet end of the first housing has a first connecting hole through which the positioning connecting rods pass, and the second air outlet end of the second housing has a second connecting hole through which the positioning connecting rods pass. The first housing is fixedly connected to the positioning connecting rods through the first connecting hole.

[0015] Preferably, the first air inlet hole and the second air inlet hole are arranged on the same axis.

[0016] Preferably, the first vent end of the first housing is sealed to the second vent end of the second housing by riveting.

[0017] Preferably, the preset distance between the air nozzle and the air inlet is 2cm to 3cm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides a self-cooling turbocharger actuator, comprising a first housing and an actuator body housed within the first housing. The actuator body includes a second housing, a rubber diaphragm housed within the second housing, and a push rod. A first cooling chamber is formed between the second and first housings. The first housing has a first air inlet and a first air outlet, with a first air inlet hole and a first air outlet hole. The second housing includes a second air inlet and a second air outlet, with a second air inlet hole and a second air outlet hole. The rubber diaphragm divides the inner cavity of the second housing into a second cooling chamber and a third cooling chamber. This structure not only provides external heat insulation for the actuator body but also allows the actuator body to self-cool internally through airflow, reducing the heat within the actuator cavity and thus lowering the actuator temperature. This significantly reduces the erosion of the internal rubber diaphragm, O-ring, and organic sealing sleeve by high temperatures, improving the actuator's reliability, reducing the turbocharger's failure rate, and offering a simple structure for easy production and installation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure in one embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of the overall structure in one embodiment of the present invention.

[0023] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0024] Explanation of icon numbers:

[0025] 10. First outer casing; 110. First cooling chamber; 120. First air inlet; 121. First air inlet hole; 130. First air outlet; 131. First air outlet hole; 140. Air nozzle; 20. Actuator body; 21. Second outer casing; 210. Second air inlet; 211. Second air inlet hole; 220. Second air outlet; 221. Second air outlet hole; 230. Second cooling chamber; 240. Third cooling chamber; 22. Rubber diaphragm; 23. Push rod; 24. Spring; 25. Positioning connecting rod. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0030] Please see the appendix Figure 1-2 This invention provides a self-cooling turbocharger actuator in one embodiment, comprising a first housing 10 and an actuator body 20 housed within the first housing 10. The actuator body 20 includes a second housing 21, a rubber diaphragm 22 housed within the second housing 21, and a push rod 23. First, it should be noted that the rubber diaphragm, push rod, and spring in this application are all relatively existing components in actuators, and their specific connection methods are well known to those skilled in the art, and will not be described in detail here. Unlike existing technologies that cool by adding coolant or by installing a heat shield between the actuator and the actuator support to reduce the heat load on the turbocharger actuator, this invention addresses these shortcomings by providing a self-cooling turbocharger actuator. Specifically:

[0031] A first cooling chamber 110 is formed between the second outer shell 21 and the first outer shell 10; the first outer shell 10 has a first air inlet end 120 and a first air outlet end 130 arranged opposite to each other along its own extending direction; the first air inlet end 120 has a first air inlet through hole 121 communicating with the first cooling chamber 110, and the first air outlet end 130 has a first air outlet through hole 131 for the push rod 23 to pass through and for exhausting air; the second outer shell 21 includes a second air inlet end 210 and a second air outlet end 220 arranged opposite to each other along its own extending direction; the second air inlet end 210 has a second air inlet through hole 211, and the second air outlet end 220 has a second air outlet through hole 221 for the push rod 23 to pass through and for exhausting air; the diameters of the first air outlet through hole 131 and the second air outlet through hole 221 are larger than the outer diameter of the push rod 23.

[0032] Specifically, the first outer shell 10 is used to isolate most of the heat outside the first outer shell 10. Therefore, a first cooling chamber 110 is formed between the second outer shell 21 and the first outer shell 10 to prevent the heat surrounding the first outer shell 10 from being directly transferred to the second outer shell 21. Some of the heat is lost through the first cooling chamber 110. The first outer shell 10 has a first air inlet end 120 and a first air outlet end 130 arranged opposite to each other along its own extension direction. In order to facilitate the airflow into the first outer shell 10, a first air inlet hole 121 communicating with the first cooling chamber 110 is opened in the first air inlet end 120. The first air inlet hole 121 is used to allow airflow to enter. The first air outlet end 130 has a first air outlet hole 131. The first air outlet hole 131 is used for the push rod 23 of the actuator body 20 to pass through so that the push rod 23 can work normally. At the same time, it is used to allow airflow to flow out from the first air outlet hole 131.

[0033] The second housing 21 is the housing of the actuator body 20. The second housing 21 includes a second air inlet 210 and a second air outlet 220 arranged opposite to each other along its own extension direction. Airflow enters from the second air inlet 210 to push the rubber diaphragm 22. Airflow flows out from the second air outlet 220 to carry away the heat inside the second housing 21, thereby reducing the heat inside the actuator body 20. Therefore, the second air inlet 210 is provided with a second air inlet hole 211 to facilitate airflow in, and the second air outlet 220 is provided with a second air outlet hole 221. The second air outlet hole 221 is used for the push rod 23 to pass through, and airflow can flow out from the second air outlet hole 221.

[0034] It is worth noting that, in order to prevent the push rod 23 from blocking the first air outlet 131 and the second air outlet 221, and to allow the airflow to flow smoothly out of the first air outlet 131 and the second air outlet 221, the diameter of the first air outlet 131 and the second air outlet 221 are set to be larger than the outer diameter of the push rod 23.

[0035] The outer periphery of the rubber diaphragm 22 is fixedly connected to the inner wall of the second housing 21. The rubber diaphragm 22 divides the inner cavity of the second housing 21 into a second cooling chamber 230 near the first air inlet 120 and a third cooling chamber 240 away from the first air inlet 120.

[0036] Specifically, the rubber diaphragm 22 is used to drive the spring 24 through air pressure, causing the push rod 23 to move axially, thereby controlling the opening of the turbocharger's exhaust valve. Since the rubber diaphragm 22 is fixedly connected to the middle of the second housing 21, it divides the inner cavity into a second cooling chamber 230 near the first intake end 120 and a third cooling chamber 240 away from the first intake end 120. When the turbocharger is working, high-pressure gas enters the second cooling chamber 230 through the first intake port 121 and the second intake port 221, generating a pushing force on the rubber diaphragm 22. At this time, the pushing force is greater than the elastic force of the spring 24, causing the push rod 23 to move axially. Simultaneously, the airflow originally retained in the third cooling chamber 240 flows towards the first exhaust port due to the pressure difference. The airflow through the first air inlet 121 and the second air outlet 221 carries away the heat in the third cooling chamber 240. When the high-pressure gas stops entering, the thrust exerted by the residual gas in the second cooling chamber 230 on the rubber diaphragm 22 is less than the elastic force of the spring 24. The spring 24 drives the push rod 23 to reset, and the airflow in the second cooling chamber 230 flows out through the first air inlet 121 and the second air inlet 211, while simultaneously carrying away the heat in the second cooling chamber 230. The continuous change of thrust caused by the pressure difference at both ends makes the airflow flow continuously and carry away the heat, thus forming the self-cooling process of the booster actuator.

[0037] It is worth mentioning that this application firstly uses the first outer shell 10 to insulate some of the heat from external heat radiation. Then, because the turbocharger's boost pressure changes constantly when the engine operates under varying conditions, the pressure within the entire actuator cavity also changes accordingly. Therefore, the multiple vents allow for continuous airflow between the actuator cavity and the outside air, and the airflow carries the heat conducted from the outer shell to the outside of the actuator, effectively cooling it. This not only insulates the actuator body 20 from the outside but also allows the actuator body 20 to cool itself internally through airflow, thereby reducing the actuator's temperature and significantly reducing the erosion of the internal rubber diaphragm 22, O-ring seals, and organic sealing sleeves by high temperatures, improving the actuator's reliability and reducing the turbocharger's failure rate. Furthermore, depending on the structural characteristics of different turbocharger actuators, their dimensions and structural features can be adaptively modified during processing. Therefore, the self-cooling turbocharger actuator structure of this application also has good versatility, is flexible, and has a simple structure.

[0038] In a preferred embodiment of the present invention, the first air inlet end 120 is provided with an air nozzle 140 protruding outward along the axial direction of the first housing 10, and the air nozzle 140 communicates with the first air inlet hole 121. It is worth noting that the air nozzle 140 can more easily access airflow. The air nozzle 140 is connected to the air nozzle at the pressure end outlet of the turbocharger through a rubber tube, so that after the airflow enters the air nozzle 140, it enters the first cooling chamber 110 and the second cooling chamber 230 through the first air inlet hole 121. Therefore, the air nozzle 140 needs to be connected to the first air inlet hole 121.

[0039] In a preferred embodiment of the present invention, the first air inlet 121 and the second air inlet 211 are spaced apart. It should be noted that the spaced arrangement of the first air inlet 121 and the second air inlet 211 allows the airflow to form an airflow protection layer on the outside of the second outer casing 21 before entering the second cooling chamber 230 to form a self-cooling operation. This provides a second layer of protection for the remaining heat after the first outer casing 10 has been isolated from external heat. Subsequently, the remaining heat can be carried away by the airflow through the combined action of the first cooling chamber 110, the second cooling chamber 230, and the third cooling chamber 240, thus forming a self-cooling structure.

[0040] Furthermore, the actuator body 20 also includes two positioning connecting rods 25 built into the second housing 21. The first air outlet end 130 of the first housing 10 has a first connecting hole through which the positioning connecting rod 25 passes, and the second air outlet end 220 of the second housing 21 has a second connecting hole through which the positioning connecting rod 25 passes. The first housing 10 is fixedly connected to the positioning connecting rod 25 through the first connecting hole.

[0041] It should be understood that in a typical actuator structure, the positioning connecting rod 25 is used for connection to the second housing 21. In order to facilitate the connection of the first housing 10 added in this application, it is also connected by the positioning connecting rod 25 to be sleeved on the outside of the second housing 21. Therefore, a first connecting hole is provided at the first air outlet 130 of the first housing 10. The first connecting hole is correspondingly provided with the second connecting hole of the second housing 21 so that the positioning connecting rod 25 can pass through.

[0042] Furthermore, the first air intake hole 121 and the second air intake hole 211 are arranged on the same axis. It should be noted that the coaxial arrangement facilitates the direct flow of air from the first air intake hole 121 into the second air intake hole 211, thereby increasing the airflow speed and accelerating the heat dissipation efficiency.

[0043] Furthermore, the first vent end 130 of the first housing 10 is sealed to the second vent end 220 of the second housing 21 by riveting. It is worth noting that the riveting process is low-cost, simple in process, and easy to process during sealing.

[0044] Furthermore, the preset distance between the air nozzle 140 and the air inlet is 2cm to 3cm. It is worth noting that the larger the preset distance, the faster the airflow forms a protective layer in the first cooling chamber 110. However, an excessively large distance can cause most of the airflow to flow into the first cooling chamber 110, reducing the self-cooling effect in the second cooling chamber 230. Therefore, preferably, the preset distance between the air nozzle 140 and the air inlet is 2cm to 3cm. This range is only provided for illustrative purposes to those skilled in the art, and the specific value can be set by those skilled in the art according to actual conditions.

[0045] To facilitate understanding by those skilled in the art, the specific workflow of this application is as follows:

[0046] When the turbocharger is working, the first housing 10 first insulates against external heat. Simultaneously, airflow enters from the nozzle 140 and flows into the first cooling chamber 110 through the first intake port 121. This first forms an airflow protection layer on the outside of the second housing 21 of the actuator body 20, providing heat insulation. Then, some airflow flows into the second cooling chamber 230 through the second intake port 211. Because the turbocharger's boost pressure changes constantly when the engine operates under varying conditions, the pressure within the entire actuator cavity also changes accordingly, thus driving the airflow inside the actuator body 20. When high-pressure gas enters the second cooling chamber 230, it exerts a pushing force on the rubber diaphragm 22. When this pushing force exceeds the elastic force of the spring 24, it drives the push rod 23 to move axially. The airflow originally retained in the third cooling chamber 240 flows to the first air outlet 131 and the second air outlet 221 due to the air pressure difference, and carries away the heat in the third cooling chamber 240. When the high-pressure gas stops entering, the thrust generated by the gas remaining in the second cooling chamber 230 on the rubber diaphragm 22 is less than the elastic force of the spring 24. The spring 24 drives the push rod 23 to reset, and the airflow in the second cooling chamber 230 flows out from the first air inlet 121 and the second air inlet 211, and at the same time carries away the heat in the second cooling chamber 230. Through the continuous change of thrust formed by the air pressure difference at both ends, the airflow flows continuously and carries away the heat, so as to form a self-cooling process of the booster actuator, and effectively cool the inside of the actuator body 20.

[0047] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A self-cooled turbocharger actuator, characterized in that, The device includes a first housing and an actuator body housed within the first housing. The actuator body includes a second housing, a rubber diaphragm housed within the second housing, a push rod, and a spring. A first cooling chamber is formed between the second outer casing and the first outer casing; The first housing has a first air inlet end and a first air outlet end disposed opposite to each other along its own extending direction; the first air inlet end has a first air inlet through hole communicating with the first cooling chamber, and the first air outlet end has a first air outlet through hole for the push rod to pass through and for exhausting air. The second housing includes a second air inlet and a second air outlet disposed opposite to each other along its own extending direction; the second air inlet has a second air inlet hole, and the second air outlet has a second air outlet hole through which the push rod passes and for exhausting air; the diameters of the first air outlet hole and the second air outlet hole are larger than the outer diameter of the push rod; The outer periphery of the rubber diaphragm is fixedly connected to the inner wall of the second housing, and the rubber diaphragm divides the inner cavity of the second housing into a second cooling chamber near the first air intake end and a third cooling chamber away from the first air intake end.

2. The self-cooled turbocharger actuator according to claim 1, characterized in that, The first air inlet end has an air nozzle protruding outward along the axial direction of the first housing, and the air nozzle is connected to the first air inlet hole.

3. The self-cooled intensifier actuator of claim 2, wherein, The first air inlet and the second air inlet are spaced apart.

4. The self-cooled intensifier actuator of claim 1, wherein, The actuator body also includes two positioning connecting rods built into the second housing. The first air outlet end of the first housing has a first connecting hole through which the positioning connecting rod passes, and the second air outlet end of the second housing has a second connecting hole through which the positioning connecting rod passes. The first housing is fixedly connected to the positioning connecting rod through the first connecting hole.

5. The self-cooled intensifier actuator of claim 2, wherein, The first air intake hole and the second air intake hole are arranged on the same axis.

6. The self-cooled intensifier actuator of claim 4, wherein, The first vent end of the first housing is sealed to the second vent end of the second housing by riveting.

7. The self-cooled intensifier actuator of claim 2, wherein, The preset distance between the air nozzle and the second air inlet is 2cm to 3cm.

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