Novel intelligent control motor integrated circulating valve

Abstract

This invention relates to a circulation valve, specifically a novel intelligent control motor-integrated circulation valve, comprising a housing and a rotor and stator housed within the housing. The rotor has an internal threaded channel. The valve also includes: a bushing with a scraping portion; a guide structure fixed within the housing and equipped with a threaded groove; and a valve stem that sequentially passes through the rotor, guide structure, and bushing and extends out of the housing. The valve stem has a first threaded segment and a second threaded segment with opposite thread directions along its length. The first and second threaded segments respectively engage with the threaded groove and internal threaded channel of the guide structure. By setting the second and first threaded segments with opposite thread directions, the valve stem rotates around its own axis while moving axially. The scraping portion on the bushing dynamically scrapes carbon from the valve stem surface, effectively solving technical problems such as carbon residue, high operating resistance, and poor motion stability in existing circulation valves.

Description

Technical Field

[0001] This invention relates to a circulation valve, specifically a novel intelligent control motor integrated circulation valve. Background Technology

[0002] Exhaust gas recirculation (EGR) technology effectively reduces engine pumping losses, lowers fuel consumption and exhaust temperature, and is particularly effective in reducing nitrogen oxide (NOx) content in emissions. The recirculation valve, as the core actuator of the EGR system, regulates combustion chamber temperature by controlling the amount of exhaust gas recirculated.

[0003] Existing circulating valves generally use a motor to drive the valve stem to make reciprocating linear motion to control the opening and closing of the valve. However, since the circulating valve is filled with high-temperature exhaust gas from the engine, which contains a large number of carbon particles, water vapor and sulfides, these substances will gradually accumulate between the valve stem and the guide sleeve to form carbon deposits, causing the valve stem to jam or even seize up, resulting in product failure.

[0004] Chinese patent CN114294132A discloses an exhaust gas recirculation device, which has a carbon deposit scraper on the side of the guide sleeve away from the valve disc. The valve stem passes through the central opening of the carbon deposit scraper, and the carbon deposits on the surface of the valve stem are scraped off by the scraper.

[0005] Chinese patent CN211549861U discloses a self-cleaning exhaust gas recirculation valve, which sets a cleaning sealing sleeve on the valve stem to remove carbon deposits on the valve stem.

[0006] Chinese patent CN206368759U discloses a carbon removal device for a circulation valve, which has a carbon brushing ring with bristles above the guide sleeve to remove carbon deposits adhering to the valve stem.

[0007] However, in the above solutions, the carbon scraper or brush bristles are fitted with a fixed clearance to the valve stem, and the valve stem only performs a single reciprocating linear motion. The scraping structure acts on the valve stem surface in a single way, making it difficult to achieve uniform carbon removal throughout the entire working stroke of the valve stem, and the carbon residue is still quite serious. Summary of the Invention

[0008] The purpose of this invention is to provide a novel intelligent control motor integrated circulation valve to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A novel intelligent control motor integrated circulation valve includes a housing and a rotor and a stator housed within the housing, wherein the rotor has an internal threaded channel formed inside. Also includes: A bushing having a scraping portion formed thereon; The guide structure is fixed inside the outer casing and is equipped with threaded through grooves; The valve stem passes sequentially through the rotor, the guide structure, and the bushing, and extends out of the outer casing. The valve stem has a first threaded section and a second threaded section with opposite thread directions along its length. The first threaded section and the second threaded section are respectively threaded into the threaded groove and the internal threaded channel of the guide structure.

[0010] The novel intelligent control motor integrated circulation valve described above has multiple notches formed on the bushing, and a fan-shaped structure is formed between two adjacent notches. A scraping part is formed on the inner side of the fan-shaped structure. When the valve stem rotates around its own axis, the scraping part forms a shear fit with the surface of the valve stem.

[0011] The novel intelligent control motor integrated circulation valve described above: the guide structure is an inner guide screw sleeve, which is fixedly installed inside the housing assembly, and the threaded groove is the internal threaded hole of the inner guide screw sleeve.

[0012] The novel intelligent control motor integrated circulation valve described above has a first threaded section with a pitch greater than the second threaded section, so that the valve stem obtains a preset rotation angle within a preset axial stroke.

[0013] The novel intelligent control motor integrated circulation valve described above: a magnetic component is fixed at one end of the valve stem, and a circuit board is arranged in the housing corresponding to the position of the magnetic component. A Hall sensor is integrated on the circuit board. The magnetic component and the Hall sensor together constitute a displacement sensor for sensing the axial displacement of the valve stem.

[0014] The novel intelligent control motor integrated circulation valve described above: the inner side of the outer casing is also provided with an elastic reset structure that connects to the rotor and is used to realize the rotor driving the valve stem to reset.

[0015] The novel intelligent control motor integrated circulation valve described above: the elastic reset structure includes an extension sleeve fixed coaxially with the rotor, and the outer periphery of the extension sleeve is fixed with annular teeth; It also includes an internal gear ring rotatably mounted inside the housing, the internal gear ring being connected to the inner wall of the housing via an elastic element; Multiple transmission gears, which mesh with the ring gear and the internal ring gear.

[0016] The novel intelligent motor integrated circulation valve described above: the elastic element is a helical spring, which is sleeved on the outside of the inner toothed ring. One end of the helical spring is fixed to the outer wall of the inner toothed ring, and the other end is fixed to the inner wall of the outer shell.

[0017] The novel intelligent control motor integrated circulation valve described above: the rotor includes a silicon steel sheet and a plurality of permanent magnets embedded in the silicon steel sheet, and the plurality of permanent magnets are distributed along the circumference of the rotor to form uniformly distributed magnetic poles.

[0018] Compared with the prior art, the beneficial effects of the present invention are: While moving axially, the valve stem rotates around its own axis. In conjunction with the scraping part on the bushing, the valve stem surface is dynamically scraped to remove carbon, which effectively solves the technical problems of carbon residue, high operating resistance and poor smoothness in existing circulation valves.

[0019] The second threaded section works with the rotor to drive the valve stem axially, while the first threaded section works with the inner guide sleeve to rotate the valve stem. The two work together to ensure both rapid valve response and thorough removal of carbon deposits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a new type of intelligent control motor integrated circulation valve; Figure 2 A top view of a new type of intelligent control motor integrated circulation valve; Figure 3 for Figure 2 Cross-sectional view along the BB direction; Figure 4 This is a diagram showing the internal structure of a new type of intelligent control motor integrated circulation valve. Figure 5 This is a schematic diagram of the valve stem and circuit board in a new type of intelligent control motor integrated circulation valve. Figure 6 This is a schematic diagram of the structure of the shaft sleeve in the integrated circulation valve of the new intelligent control motor.

[0021] In the diagram: 1. Housing; 2. Plug; 3. End cap; 4. Valve stem; 401. First threaded section; 402. Second threaded section; 403. Magnetic component; 5. Inner guide threaded sleeve; 6. Inner gear ring; 7. Transmission gear; 8. Rotor; 801. Inner threaded channel; 802. Extension sleeve; 9. Stator; 10. Ring gear; 11. Elastic component; 12. Circuit board; 1201. Hall sensor; 13. Bushing; 1301. Notch; 1302. Scraping section; 14. Protective cover. Detailed Implementation

[0022] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0024] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0025] Please see Figures 1-3 The present application provides a novel intelligent control motor integrated circulation valve, which includes an outer shell and a rotor 8 and a stator 9 placed inside the outer shell.

[0026] In this embodiment, the outer casing includes a housing 1 and an end cap 3. The stator 9 is fixed inside the housing 1, and the rotor 8 is placed inside the housing 1 and wrapped by the stator 9. The end cap 3 and the housing 1 can be fixed with bolts to enclose the rotor 8 and the stator 9 inside the outer casing, ensuring the airtightness of the internal structure and the stability of operation.

[0027] In this embodiment, the novel intelligent control motor integrated circulation valve further includes a bushing 13, a guide structure, and a valve stem 4. The bushing 13 has a scraping portion 1302. The guide structure is fixed within the outer casing and is equipped with a threaded groove. The valve stem 4 sequentially passes through the internal threaded channel 801 formed on the rotor 8, the guide structure, and the bushing 13, and extends out of the outer casing. A plug 2 is fixed to one end of the valve stem 4 extending out of the outer casing for controlling the opening and closing of the valve. The valve stem 4 has a first threaded section 401 and a second threaded section 402 with opposite thread directions along its length. The first threaded section 401 and the second threaded section 402 are respectively threaded into the threaded groove of the guide structure and the internal threaded channel 801. When the rotor 8 rotates, the valve stem 4 moves along its own axial direction under the engagement of the second threaded section 402 and the internal threaded channel 801, and simultaneously rotates around its own axis under the engagement of the first threaded section 401 and the threaded groove. The scraping portion 1302 of the bushing 13 scrapes away carbon deposits on the surface of the valve stem 4 when the valve stem 4 rotates.

[0028] The end cap 3 is provided with a groove for placing the bushing 13, and a protective cover 14 for dust prevention of the groove is provided. The protective cover 14 is sealed and snapped into the outer opening of the end cap 3 to prevent external impurities from entering the valve stem movement gap, thereby further ensuring the working stability of scraping carbon deposits.

[0029] As a further embodiment of the present invention, please refer to [reference needed]. Figure 6The bushing 13 has multiple notches 1301, and a fan-shaped structure is formed between two adjacent notches 1301. A scraping part 1302 is formed on the inner side of the fan-shaped structure. When the valve stem 4 rotates around its own axis, the scraping part 1302 forms a shear fit with the surface of the valve stem 4.

[0030] Preferably, the gap between the scraping part 1302 and the valve stem 4 is 0.05mm to 0.1mm, and the side teeth of the scraping part 1302 are acute angled. When the valve stem 4 rotates while moving axially, the acute angled side teeth of the scraping part 1302 can effectively cut into the carbon deposit layer on the surface of the valve stem 4 and peel it off, thereby improving the effect of scraping off carbon deposits.

[0031] It should be understood that the number of notches 1301 and the size of the fan-shaped structure can be adjusted according to the actual working conditions. For example, two, three or more notches 1301 can be set, as long as they can form an effective scraping part 1302.

[0032] In this embodiment, the guide structure is an inner guide sleeve 5, which is fixedly installed inside the housing assembly. The threaded groove is the internal threaded hole of the inner guide sleeve 5. The first threaded section 401 of the valve stem 4 passes through the internal threaded hole of the inner guide sleeve 5 and engages with it. When the valve stem 4 moves axially under the drive of the second threaded section 402, since the inner guide sleeve 5 is fixed, the first threaded section 401 is forced to rotate under the thread constraint of the inner guide sleeve 5, thereby causing the valve stem 4 to rotate around its own axis while moving axially.

[0033] As a further embodiment of the present invention, please refer to... Figure 5 The pitch of the first threaded section 401 is greater than the pitch of the second threaded section 402, so that the valve stem 4 can obtain a preset rotation angle within a preset axial stroke.

[0034] Specifically, the smaller pitch of the second threaded section 402 allows the rotor 8 to drive the axial displacement of the valve stem 4 without requiring too much torque, thus ensuring the valve's response speed and accuracy; the larger pitch of the first threaded section 401 reduces the resistance encountered by the valve stem 4 during axial displacement, while ensuring that the scraping part 1302 and the surface of the valve stem 4 form a sufficient shear fit.

[0035] Preferably, both the second threaded section 402 and the first threaded section 401 are double-ended threads. By reasonably configuring the pitch ratio of the second threaded section 402 and the first threaded section 401, the valve stem 4 can rotate at a preset angle during the entire stroke from fully closed to fully open, so as to ensure that the scraping part 1302 of the bushing 13 can completely scrape the entire surface of the valve stem 4, achieving carbon removal without dead angles.

[0036] In this embodiment, please refer to Figure 3 and Figure 5A magnetic component 403 is fixed at the end of the valve stem 4 away from the valve. A circuit board 12 is provided in the housing corresponding to the position of the magnetic component 403. A Hall sensor 1201 is integrated on the circuit board 12. The magnetic component 403 and the Hall sensor 1201 together constitute a displacement sensor for sensing the axial displacement of the valve stem 4.

[0037] Specifically, when the valve stem 4 moves axially, the magnetic component 403 moves synchronously with the valve stem 4. The Hall sensor 1201 detects the position change of the magnetic component 403 and outputs a corresponding electrical signal. The circuit board 12 calculates the actual displacement of the valve stem 4 based on the electrical signal and forms feedback with the circuit board 12 to realize dual position detection. The circuit board integrates a current acquisition module and a position detection chip in a dual-loop drive module, which can realize real-time current acquisition and accurate position detection. By debugging the program, the cascade control of current and position signals can be realized to ensure that the circulation valve is more stable and accurate.

[0038] As a further embodiment of the present invention, an elastic reset structure is provided on the inner side of the outer casing to connect the rotor 8 and to realize the reset of the valve stem 4 driven by the rotor 8.

[0039] Specifically, the elastic reset structure includes an extension sleeve 802 fixed coaxially with the rotor 8, with an annular tooth 10 fixed on the outer periphery of the extension sleeve 802, and an inner toothed ring 6 rotatably installed in the outer shell, the inner toothed ring 6 being connected to the inner wall of the outer shell through an elastic element 11; the elastic reset structure also includes a plurality of transmission gears 7, the transmission gears 7 meshing with the annular tooth 10 and the inner toothed ring 6.

[0040] In a preferred embodiment, the elastic element 11 is a helical spring, which is sleeved on the outside of the inner toothed ring 6. One end of the helical spring is fixed to the outer wall of the inner toothed ring 6, and the other end is fixed to the inner wall of the outer shell.

[0041] When the rotor 8 rotates, the rotational motion of the rotor 8 is transmitted to the internal gear ring 6 through the meshing of the extension sleeve 802, the ring tooth 10, the transmission gear 7, and the internal gear ring 6. When the internal gear ring 6 rotates, it twists the helical spring, causing the helical spring to deform. When the stator 9 is de-energized or stops driving, the helical spring releases its elastic force, driving the internal gear ring 6 to rotate in the opposite direction. Through the transmission gear 7, the ring tooth 10, and the extension sleeve 802, the rotor 8 is driven to rotate in the opposite direction. Then, through the cooperation of the second threaded section 402 and the internal threaded channel 801, the valve stem 4 is driven to return to the closed valve position, so that the circulation valve can automatically return to the closed state when the power is off or the work stops, improving the safety and reliability of the product. It is understood that the elastic element 11 can also be other forms of elastic elements, such as torsion springs, spring sheets, etc., as long as the elastic reset function can be achieved.

[0042] In this embodiment, the rotor 8 includes silicon steel sheets and a plurality of permanent magnets embedded in the silicon steel sheets. The plurality of permanent magnets are distributed along the circumference of the rotor 8 to form uniformly distributed magnetic poles.

[0043] Specifically, permanent magnets are inserted into silicon steel sheets and evenly spaced along the circumference of rotor 8 to form alternating N and S poles. Compared with traditional ferrite injection-molded rotors, the silicon steel sheet embedded permanent magnet structure in this embodiment can effectively avoid cracks and precision deviations generated during injection molding. At the same time, the permanent magnets use high-performance permanent magnet materials, such as neodymium iron boron, which can significantly improve the surface magnetic intensity of rotor 8, making the magnetic pole distribution more uniform, thereby improving the torque output characteristics of the motor and improving the smoothness and control accuracy of valve stem 4 movement.

[0044] The novel intelligent control motor integrated circulation valve provided in this application, by setting a second thread section 402 and a first thread section 401 with opposite thread directions, allows the valve stem 4 to rotate around its own axis while moving axially. In conjunction with the scraping part 1302 on the bushing 13, the surface of the valve stem 4 is dynamically scraped to remove carbon, which effectively solves the technical problems of carbon residue, high operating resistance and poor movement stability in existing circulation valves.

[0045] The second threaded section 402 works with the rotor 8 to drive the valve stem 4 axially, while the first threaded section 401 works with the inner guide sleeve 5 to rotate the valve stem 4. The two work together to ensure both the rapid response of the valve and the thorough removal of carbon deposits.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel intelligent control motor integrated circulation valve, comprising an outer shell and a rotor (8) and a stator (9) disposed within the outer shell, wherein an internal threaded channel (801) is formed inside the rotor (8). Its features are, Also includes: A bushing (13) having a scraping portion (1302) formed thereon. The guide structure is fixed inside the outer casing and is equipped with threaded through grooves; The valve stem (4) passes through the rotor (8), the guide structure and the bushing (13) in sequence and extends out of the outer casing; The valve stem (4) has a first threaded section (401) and a second threaded section (402) with opposite thread directions along its length. The first threaded section (401) and the second threaded section (402) are respectively threaded into the threaded groove and the internal threaded channel (801) of the guide structure.

2. The novel intelligent control motor integrated circulation valve according to claim 1, characterized in that, The bushing (13) has multiple notches (1301) formed on it. A fan-shaped structure is formed between two adjacent notches (1301). A scraping part (1302) is formed on the inner side of the fan-shaped structure. When the valve stem (4) rotates around its own axis, the scraping part (1302) forms a shear fit with the surface of the valve stem (4).

3. The novel intelligent control motor integrated circulation valve according to claim 1, characterized in that, The guide structure is an inner guide screw sleeve (5), which is fixedly installed inside the housing assembly. The threaded groove is the internal threaded hole of the inner guide screw sleeve (5).

4. The novel intelligent control motor integrated circulation valve according to claim 1, characterized in that, The pitch of the first threaded segment (401) is greater than the pitch of the second threaded segment (402) so that the valve stem (4) obtains a preset rotation angle within a preset axial stroke.

5. A novel intelligent control motor integrated circulation valve according to claim 1, characterized in that, A magnetic component (403) is fixed at one end of the valve stem (4). A circuit board (12) is provided in the housing corresponding to the position of the magnetic component (403). A Hall sensor (1201) is integrated on the circuit board (12). The magnetic component (403) and the Hall sensor (1201) together constitute a displacement sensor for sensing the axial displacement of the valve stem (4).

6. The novel intelligent control motor integrated circulation valve according to claim 1, characterized in that, The inner side of the outer casing is also provided with an elastic reset structure that connects to the rotor (8) and is used to enable the rotor (8) to drive the valve stem (4) to reset.

7. A novel intelligent control motor integrated circulation valve according to claim 6, characterized in that, The elastic reset structure includes an extension sleeve (802) fixed coaxially with the rotor (8), and the outer periphery of the extension sleeve (802) is fixed with annular teeth (10). It also includes an internal toothed ring (6) rotatably mounted in the housing, the internal toothed ring (6) being connected to the inner wall of the housing via an elastic element (11); Multiple transmission gears (7) mesh with the ring gear (10) and the internal gear ring (6).

8. A novel intelligent control motor integrated circulation valve according to claim 7, characterized in that, The elastic element (11) is a helical spring, which is sleeved on the outside of the inner toothed ring (6). One end of the helical spring is fixed to the outer wall of the inner toothed ring (6), and the other end is fixed to the inner wall of the outer shell.

9. A novel intelligent control motor integrated circulation valve according to claim 1, characterized in that, The rotor (8) includes a silicon steel sheet and a plurality of permanent magnets embedded in the silicon steel sheet. The plurality of permanent magnets are distributed along the circumference of the rotor (8) to form uniformly distributed magnetic poles.

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