Mechanical fuel proportional delivery valve capable of self-adjusting flow

Abstract

The application discloses a mechanical fuel proportional oil delivery valve capable of autonomously adjusting flow, and belongs to the field of fuel delivery equipment. The mechanical fuel proportional oil delivery valve comprises a main valve body, a one-way valve seat, a one-way valve assembly and an oil inlet joint. The main valve body is internally provided with an oil inlet, an oil flow channel and an oil outlet. The two ends of the oil flow channel are respectively connected with the oil inlet and the oil outlet. The one-way valve seat is installed on the main valve body, and the oil inlet joint is installed on the one-way valve seat. The one-way valve seat is internally provided with a sealing cavity, and the oil inlet joint is internally provided with an oil inlet hole. One side of the sealing cavity is used for being communicated with the oil inlet hole of the oil inlet joint, and the other side of the sealing cavity is communicated with the oil inlet of the main valve body. The one-way valve assembly is arranged in the sealing cavity. The one-way valve assembly comprises a sealing cover body and a first spring. The sealing cover body is used for sealing the oil inlet hole of the oil inlet joint. The first spring is used for applying elastic force to the sealing cover body, so that the sealing cover body is pressed against the end face of the oil inlet joint on the side facing the one-way valve seat.

Description

Technical Field

[0001] This invention belongs to the technical field of fuel delivery equipment, specifically relating to a mechanical fuel proportioning valve with adjustable flow rate. Background Technology

[0002] During the combustion process of fuel in an aircraft's fuel tanks, precise control of fuel flow rates in different tanks plays a crucial role in the aircraft's combustion efficiency, energy consumption, and the control of its center of gravity. Currently, most common autonomous fuel proportioning valves rely on electronic control systems or external power sources to achieve flow regulation. For example, electric regulating valves control the valve opening by receiving electrical signals to regulate fuel flow.

[0003] While fuel delivery valves relying on electronic components or external power can regulate fuel flow, they suffer from several drawbacks. First, electronic control systems are complex and costly, and prone to failure in harsh environments (such as high temperature, high humidity, and strong electromagnetic interference), resulting in low reliability. Second, when the external power source (such as electricity) malfunctions, the fuel delivery valve cannot operate normally, seriously threatening flight safety. Therefore, there is an urgent need for a purely mechanical fuel proportioning valve that can autonomously adjust flow. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a mechanically adjustable fuel proportioning valve with self-adjusting flow rate. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention provides a mechanical fuel proportioning valve with self-adjustable flow rate, comprising a main valve body, a one-way valve seat, a one-way valve assembly, and an inlet connector. The main valve body is provided with an inlet, an oil flow channel, and an outlet. The two ends of the oil flow channel are respectively connected to the inlet and the outlet. The one-way valve seat is installed on the main valve body, and the inlet connector is installed on the one-way valve seat. The one-way valve seat has a sealing cavity, and the oil inlet connector has an oil inlet hole. One side of the sealing cavity is used to communicate with the oil inlet hole of the oil inlet connector, and the other side of the sealing cavity is used to communicate with the oil inlet of the main valve body. The one-way valve assembly is disposed in the sealing cavity. The one-way valve assembly includes a sealing cover and a first spring. The sealing cover is used to close the oil inlet hole of the oil inlet connector, and the first spring is used to apply an elastic force to the sealing cover so that the sealing cover presses against the end face of the oil inlet connector facing the one-way valve seat.

[0005] In one embodiment of the present invention, the sealing cover includes a cover plate and an annular surrounding plate. The end faces of the cover plate and the annular surrounding plate are connected and together form a receiving cavity. The opening of the receiving cavity faces the main valve body. One end of the first spring is located in the receiving cavity. The cover plate abuts against the end face of the oil inlet connector facing the one-way valve seat. The annular surrounding plate is provided with a through hole.

[0006] In one embodiment of the present invention, the sealing cavity includes a first chamber, a second chamber, and a third chamber arranged sequentially. The first chamber, the second chamber, and the third chamber are all cylindrical cavities with their diameters decreasing sequentially. The first chamber is used to communicate with the oil inlet, and the third chamber is used to communicate with the oil inlet. One end of the annular surrounding plate is located inside the second chamber and is limited to fit against the inner wall of the second chamber. There is a step between the second chamber and the third chamber. One end of the first spring is located inside the receiving cavity, and the other end abuts against the step.

[0007] In one embodiment of the present invention, the cover plate is a circular plate, and the oil inlet, the cover plate, the annular surrounding plate, the first chamber, the second chamber and the third chamber are all coaxially arranged. The diameter of the cover plate is larger than the diameter of the oil inlet, and the diameter of the third chamber is equal to the diameter of the oil inlet.

[0008] In one embodiment of the present invention, an adaptive oil adjustment component is further included, which includes an adjustment valve seat, a pressure plate, a baffle, and a second spring. The regulating valve seat is located on the main valve body. The regulating valve seat has a regulating oil chamber. The pressure plate is located in the regulating oil chamber and divides the regulating oil chamber into an upper chamber and a lower chamber. The second spring is located in the lower chamber. The regulating valve seat and the main valve body are provided with through holes. One end of the through hole is connected to the lower chamber, and the other end of the through hole is connected to the oil flow channel. One end of the baffle is connected to the pressure plate, and the other end of the baffle extends through the through hole into the oil flow channel. The regulating valve seat is provided with a regulating flow channel. One end of the regulating flow channel is connected to the upper chamber, and the other end is connected to the sealing chamber.

[0009] In one embodiment of the present invention, the regulating valve seat and the main valve body are an integral structure, and the sealing cavity includes a first chamber, a second chamber and a third chamber arranged in sequence. The first chamber is used to communicate with the oil inlet, the third chamber is used to communicate with the oil inlet, and the one-way valve seat is provided with an oblique flow channel. One end of the oblique flow channel is connected to the third chamber and the other end is connected to the regulating flow channel.

[0010] In one embodiment of the present invention, the main valve body is provided with two oil flow channels and two oil inlets. Two one-way valve seats, two one-way valve assemblies and two oil inlet connectors are provided. The two one-way valve seats and two oil inlet connectors are respectively disposed on both sides of the main valve body. The two one-way valve seats are respectively connected to the two oil inlets, the two oil inlet connectors are respectively connected to the two one-way valve seats, and the two one-way valve assemblies are respectively disposed in the two one-way valve seats.

[0011] In one embodiment of the present invention, two adaptive oil flow regulating components are provided, the regulating flow channels of the two oil flow regulating components are respectively connected to the sealing cavities of two one-way valve seats, and the baffles of the two oil flow regulating components extend into the two oil flow channels respectively.

[0012] In one embodiment of the present invention, the regulating valve seat includes a seat body and a top cover. The seat body is disposed on the main valve body, and the top cover and the seat body are fastened together by fasteners. The seat body is provided with a regulating oil chamber, and the top cover is used to close the regulating oil chamber. The top cover has an annular protrusion on the side facing the seat. A sealing ring is provided between the outer circumference of the annular protrusion and the inner wall of the regulating oil chamber. A sealing ring is also provided between the outer circumference of the pressure plate and the inner wall of the regulating oil chamber.

[0013] In one embodiment of the present invention, a sealing ring is provided between the one-way valve seat and the oil inlet connector.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the above-described scheme of the present invention, firstly, when the oil is input from the oil inlet hole of the oil inlet connector, it can first accumulate in the oil inlet hole. When the oil pressure reaches the preset value of the one-way valve assembly, the oil applies pressure to the sealing cover, causing the sealing cover to move towards the main valve body and compress the first spring. When the sealing cover moves, it separates from the end face of the oil inlet connector. At this time, the oil inlet hole and the sealing cavity are connected, and the oil can flow from the space between the sealing cover and the end face of the oil inlet connector into the sealing cavity, and then flow into the oil flow channel through the sealing cavity and the oil inlet hole in sequence. Secondly, when the oil pressure decreases to the preset value of the one-way valve assembly, the spring pushes the sealing cover to move and abut against the end face of the oil inlet connector. At this time, the oil inlet hole and the sealing cavity are disconnected, preventing the oil from entering the oil flow channel, thus achieving oil cut-off. Simultaneously, when the flow rate and pressure of the externally input oil change, the sealing cap will autonomously move towards or away from the end face of the oil inlet connector. This allows it to adaptively adjust the size of the oil flow orifice according to the flow rate and pressure of the externally input oil, thereby adaptively adjusting the amount of oil entering the main valve body and achieving autonomous flow regulation. The oil transfer valve of this invention adopts a purely mechanical structure. Compared to existing oil transfer valves that rely on electronic components or external power, the oil transfer valve of this invention does not require an electronic control system, has low cost, high reliability, and does not depend on an external power source. Therefore, it will not malfunction due to abnormalities in the external power source, thus improving aircraft flight safety.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the oil delivery valve in an embodiment of the present invention; Figure 2 This is a schematic diagram of a one-way valve assembly in an embodiment of the present invention; Figure 3 This is a schematic diagram of the sealing cover in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the main valve body in an embodiment of the present invention; Figure 5 This is an external schematic diagram of the main valve body in an embodiment of the present invention.

[0017] Reference numerals: 1-Main valve body, 101-Inlet, 102-Oil flow channel, 103-Outlet, 2-One-way valve seat, 3-One-way valve assembly, 301-Sealing cover, 3011-Cover plate, 3012-Annular surrounding plate, 302-First spring, 303-Through hole, 304-First chamber, 305-Second chamber, 306-Third chamber, 307-Inclined flow channel, 4-Inlet connector, 401-Inlet hole, 5-Adaptive oil adjustment assembly, 501-Adjusting valve seat, 502-Pressure plate, 503-Blocking component, 504-Second spring, 6-First fastener, 7-Second fastener, 8-First sealing ring, 9-Second sealing ring, 10-Third sealing ring, 11-Adjusting flow channel, 12-Adjusting oil chamber. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This invention provides a mechanically adjustable fuel proportioning valve, comprising a main valve body 1, a one-way valve seat 2, a one-way valve assembly 3, and an inlet connector 4. The main valve body 1 has an inlet port 101, a fluid flow channel 102, and an outlet port 103. The two ends of the fluid flow channel 102 are respectively connected to the inlet port 101 and the outlet port 103. The one-way valve seat 2 is mounted on the main valve body 1, and the inlet connector 4 is mounted on the one-way valve seat 2. The one-way valve seat 2 has a sealing cavity, and the inlet connector 4 has an inlet hole. 401, one side of the sealing cavity is used to communicate with the oil inlet hole 401 of the oil inlet connector 4, and the other side of the sealing cavity is used to communicate with the oil inlet 101 of the main valve body 1. The one-way valve assembly 3 is disposed in the sealing cavity. The one-way valve assembly 3 includes a sealing cover 301 and a first spring 302. The sealing cover 301 is used to close the oil inlet hole 401 of the oil inlet connector 4. The first spring 302 is used to apply an elastic force to the sealing cover 301 so that the sealing cover 301 presses against the end face of the oil inlet connector 4 facing the one-way valve seat 2.

[0020] In some embodiments of the present invention, the main valve body 1 and the one-way valve seat 2 are separately provided, which facilitates the production and processing of the main valve body 1 and the one-way valve seat 2. Both the main valve body 1 and the one-way valve seat 2 are provided with ear plates. The ear plates of the main valve body 1 and the one-way valve seat 2 are fastened together by a second fastener 7, which is a bolt, screw or other fastener.

[0021] In some embodiments of the present invention, the front end of the one-way valve seat 2 is provided with a threaded hole, the rear end of the oil inlet connector 4 is provided with an external thread, the rear end of the oil inlet connector 4 extends into the threaded hole of the one-way valve seat 2 and is threadedly connected to the threaded hole of the one-way valve seat 2, and the outer periphery of the oil inlet connector 4 is provided with an annular block, which abuts against the front end face of the one-way valve seat 2. In this way, the sealing performance between the one-way valve seat 2 and the oil inlet connector 4 can be improved.

[0022] In some embodiments of the present invention, the cross-sectional area of ​​the sealing cover 301 is larger than the area of ​​the oil inlet 401, or the projection of the oil inlet 401 along its axial direction is located on the sealing cover 301, so that the sealing cover 301 can seal the oil inlet 401 and prevent oil from leaking from the gap between the sealing cover 301 and the oil inlet connector 4.

[0023] In some embodiments of the present invention, in the initial state, that is, when the sealing cover 301 is pressed against the end face of the oil inlet connector 4 facing the one-way valve seat 2, the first spring 302 is in a compressed state. The elastic force provided by the first spring 302 to the sealing cover 301 can press the sealing cover 301 tightly against the end face of the oil inlet connector 4. By using first springs 302 of different types, materials and stiffnesses, the flow pressure of the one-way valve assembly 3 can be adjusted to adapt to different usage environments and usage requirements.

[0024] In some embodiments of the present invention, the main valve body 1, the one-way valve seat 2, and the oil inlet connector 4 can all be made of hard aluminum alloy.

[0025] In the above-described scheme of the present invention, firstly, when the oil is input from the oil inlet 401 of the oil inlet connector 4, it can first accumulate in the oil inlet 401. When the pressure of the oil reaches the preset value of the one-way valve assembly 3, the oil applies pressure to the sealing cover 301, causing the sealing cover 301 to move towards the side of the main valve body 1 and compress the first spring 302. When the sealing cover 301 moves, it separates from the end face of the oil inlet connector 4. At this time, the oil inlet 401 and the sealing cavity are connected, and the oil can flow from the space between the sealing cover 3011 and the end face of the oil inlet connector 4 into the sealing cavity, and then flow into the oil flow channel 102 through the sealing cavity and the oil inlet 101 in sequence. Secondly, when the pressure of the oil decreases to the preset value of the one-way valve assembly 3, the spring pushes the sealing cover 301 to move and abut against the end face of the oil inlet connector 4. At this time, the oil inlet 401 and the sealing cavity are disconnected, preventing the oil from entering the oil flow channel 102, thus achieving the cut-off of the oil. Simultaneously, when the flow rate and pressure of the externally input oil change, the sealing cover 301 will autonomously move towards or away from the end face of the oil inlet connector 4. This allows it to adaptively adjust the size of the oil flow hole 303 according to the flow rate and pressure of the externally input oil, thereby adaptively adjusting the amount of oil entering the main valve body 1 and achieving autonomous flow regulation. The oil supply valve of this invention adopts a purely mechanical structure. Compared to existing oil supply valves that rely on electronic components or external power, the oil supply valve of this invention does not require an electronic control system, has low cost, high reliability, and does not depend on an external power source. Therefore, it will not malfunction due to abnormalities in the external power source, thus improving aircraft flight safety.

[0026] It is understood that the fuel delivery valve of this invention adopts a purely mechanical design, requiring no electronic components or external power source. This avoids the problem of electronic control systems being prone to failure in harsh environments, greatly improving the reliability and stability of the fuel delivery valve, making it suitable for various complex working environments. Simultaneously, the fuel delivery valve of this invention can autonomously adjust its flow rate, exhibiting strong adaptability. It can automatically adjust the fuel flow rate according to changes in the input pressure of the fuel system, achieving proportional fuel delivery from different fuel tanks without frequent manual intervention, and can adapt to fuel flow requirements under different operating conditions. Furthermore, the fuel delivery valve of this invention has a simple structure and low cost. Compared to fuel delivery valves relying on electronic control systems, the structure of this invention is simpler, reducing the use of electronic components and complex control circuits, lowering production and maintenance costs, and possessing good market application prospects. Moreover, the fuel delivery valve of this invention is easy to operate and flexible in adjustment. Different flow control effects can be achieved by changing springs with different stiffness, material elastic limit, and other technical parameters, meeting the diverse needs of different users and different operating conditions.

[0027] In some embodiments of the present invention, such as Figure 1 and Figure 3As shown, the sealing cover 301 includes a cover plate 3011 and an annular surrounding plate 3012. The end faces of the cover plate 3011 and the annular surrounding plate 3012 are connected and form a receiving cavity. The opening of the receiving cavity faces the main valve body 1. One end of the first spring 302 is located in the receiving cavity. The cover plate 3011 presses against the end face of the oil inlet connector 4 facing the one-way valve seat 2. The annular surrounding plate 3012 is provided with a through hole 303. With this structure, the accommodating cavity can provide space for the installation and positioning of the first spring 302, improving the stability of the spring installation; the cover plate 3011 presses against the end face of the oil inlet connector 4, forming a static sealing interface; when the annular surrounding plate 3012 is provided with a through hole 303, when the oil in the oil inlet hole 401 pushes the cover plate 3011 away from the oil inlet connector 4, the oil flows through the space between the cover plate 3011 and the oil inlet connector 4 to the outside of the annular surrounding plate 3012, and then flows through the through hole 303 into the accommodating cavity inside the annular surrounding plate 3012, and then flows through the accommodating cavity into the oil flow channel 102 of the main valve body 1.

[0028] In some embodiments of the present invention, the annular surrounding plate 3012 is provided with a plurality of through holes 303, which are evenly distributed along the circumference of the annular surrounding plate 3012.

[0029] In some embodiments of the present invention, such as Figure 1 , Figure 2 and Figure 3As shown, the sealing cavity includes a first chamber 304, a second chamber 305, and a third chamber 306 arranged sequentially. The first chamber 304, the second chamber 305, and the third chamber 306 are all cylindrical cavities with their diameters decreasing sequentially. The first chamber 304 is used to communicate with the oil inlet 401, and the third chamber 306 is used to communicate with the oil inlet 101. One end of the annular surrounding plate 3012 is located inside the second chamber 305 and is limited to fit against the inner wall of the second chamber 305. There is a step between the second chamber 305 and the third chamber 306. One end of the first spring 302 is located inside the accommodating cavity, and the other end abuts against the step. With this structure, the annular retaining plate 3012 and the inner wall of the second chamber 305 are matched in a limiting manner, allowing the second chamber 305 to restrict the movement of the annular retaining plate 3012, improving the installation accuracy and stability of the sealing cover 301. The sealing cover 301 moves under the pressure of the oil, along the inner wall of the second chamber 305. The second chamber 305 guides the movement trajectory of the sealing cover 301, improving its stability during movement and simultaneously enhancing the stability of the spring located inside the annular retaining plate 3012. One end of the first spring 302 is located inside the accommodating cavity, and the other end abuts against the step, allowing the first spring 302 to apply an elastic force to the sealing cover 301. When the oil pushes the sealing cover 301 towards the main valve body 1, the compression of the first spring 302 increases, increasing the elastic force applied to the sealing cover 301, thereby enabling adaptive flow regulation. Furthermore, an oil chamber can be formed between the first chamber 304 and the outer wall of the annular surrounding plate 3012, so that when the cover plate 3011 moves away from the oil inlet connector 4, the oil can first fill the chamber to avoid excessive oil impact and damage to the one-way valve assembly 3.

[0030] In some embodiments of the present invention, such as Figure 1 , Figure 2 and Figure 3 As shown, the cover plate 3011 is a circular plate. The oil inlet 401, cover plate 3011, annular surrounding plate 3012, first chamber 304, second chamber 305, and third chamber 306 are all coaxially arranged. The diameter of the cover plate 3011 is larger than the diameter of the oil inlet 401, and the diameter of the third chamber 306 is equal to the diameter of the oil inlet 101. This structure, firstly, allows all components to be arranged coaxially to form a straight flow channel, significantly reducing turbulence and pressure loss; secondly, the coaxial structure ensures symmetrical force distribution, preventing lateral wear and extending the service life of the oil valve. Furthermore, the larger diameter of the cover plate 3011 than the oil inlet 401 ensures that the cover plate 3011 can effectively seal the oil inlet 401.

[0031] In some embodiments of the present invention, the inner diameter of the first spring 302 is larger than the diameter of the third chamber 306.

[0032] In some embodiments of the present invention, such as Figure 1 , Figure 4 and Figure 5 As shown, the oil supply valve also includes an adaptive oil regulating component 5, which includes a regulating valve seat 501, a pressure plate 502, a baffle 503, and a second spring 504. The regulating valve seat 501 is disposed on the main valve body 1, and a regulating oil chamber 12 is provided inside the regulating valve seat 501. The pressure plate 502 is disposed in the regulating oil chamber 12 and divides the regulating oil chamber 12 into an upper chamber and a lower chamber. The second spring 504 is disposed in the lower chamber. A through hole is provided through the regulating valve seat 501 and the main valve body. One end of the through hole is connected to the lower chamber, and the other end of the through hole is connected to the oil flow channel 102. One end of the baffle 503 is connected to the pressure plate 502, and the other end of the baffle 503 extends through the through hole into the oil flow channel 102. A regulating flow channel 11 is provided on the regulating valve seat 501. One end of the regulating flow channel 11 is connected to the upper chamber, and the other end is connected to the sealing cavity.

[0033] Understandably, when the oil pressure in the oil inlet 401 is greater than the initial elastic force of the first spring 302, the oil pushes the cover plate 3011 toward the main valve body 1, forming an oil flow gap between the cover plate 3011 and the oil inlet connector 4. The oil flows through the gap into the first chamber 304 and through the through hole 303 on the annular surrounding plate 3012 into the third chamber 306. At this time, one path of the oil is through the oil flow channel 102 of the main valve body 1 to the oil outlet 103, and the other path is through the regulating flow channel 11 into the regulating oil chamber 12. The oil entering the regulating oil chamber 12 applies pressure to the pressure plate 502, causing the pressure plate 502 to drive the baffle 503 to move into the oil flow channel 102, thereby using the baffle 503 to block the oil in the oil flow channel 102 and reduce the flow rate of the oil flowing out of the oil outlet 103.

[0034] When the oil pressure in the inlet 401 is low, the cover plate 3011 moves towards the inlet connector 4 under the elastic action of the first spring 302, and the flow gap between the cover plate 3011 and the inlet connector 4 gradually decreases. At this time, the oil pressure in the one-way valve seat 2 decreases, and the pressure plate 502 in the adaptive oil regulating component 5 moves away from the oil flow channel 102 under the elastic action of the second spring 504. When the pressure plate 502 moves, it pushes the oil in the regulating oil chamber 12 to flow back. At the same time, when the pressure plate 502 moves, it also drives the baffle 503 to move away from the oil flow channel 102, thereby reducing the blocking effect of the baffle 503 and increasing the flow rate of the oil in the oil flow channel 102. In this way, the one-way valve component 3 and the adaptive oil regulating component 5 cooperate with each other, so that the fuel delivery valve can use a dynamic "breathing" regulation method to control the outlet flow rate within a preset range value, realize autonomous flow regulation, and ensure the fuel outflow ratio.

[0035] When the oil pressure in the oil inlet 401 is less than the initial elastic force of the first spring 302, the cover plate 3011 presses against the end face of the oil inlet connector 4 under the elastic action of the first spring 302, thereby sealing the oil inlet 401 of the oil inlet connector 4, cutting off the oil flow path in the oil inlet 401, and stopping the delivery of oil.

[0036] Understandably, fuel flows in through the inlet port 401, and when the pressure reaches the preset value, the one-way valve opens, allowing fuel to enter the one-way valve body through the valve core. The fuel pressure is transmitted to the regulating oil chamber 12 via the regulating flow channel 11. Different pressures cause the pressure plate 502 to move downwards against the spring force of the second spring 504, thereby adjusting the flow area of ​​the main valve body 1 and controlling the fuel flow rate. To ensure a fixed fuel outflow ratio, when the inlet pressure and flow rate are high, the pressure on the pressure plate 502 is greater, resulting in a larger downward displacement of the baffle 503 driven by the pressure plate 502, and a smaller fuel flow rate. Conversely, even if the input fuel flow rate changes continuously in actual operating conditions, this dynamic "breathing" adjustment can control the outlet flow rate within the preset range, achieving autonomous flow rate regulation.

[0037] In some embodiments of the present invention, such as Figure 1 , Figure 4 and Figure 5 As shown, the regulating valve seat 501 and the main valve body are an integral structure. The sealing cavity includes a first chamber 304, a second chamber 305, and a third chamber 306 arranged sequentially. The first chamber 304 is connected to the oil inlet 401, and the third chamber 306 is connected to the oil inlet 101. The one-way valve seat 2 is provided with an oblique flow channel 307. One end of the oblique flow channel 307 is connected to the third chamber 306, and the other end is connected to the regulating flow channel 11. With this structure, the regulating valve seat 501 and the main valve body are an integral structure, resulting in higher overall strength and easier integrated manufacturing. When the one-way valve seat 2 is provided with an oblique flow channel 307, and one end of the oblique flow channel 307 is connected to the third chamber 306, the oil will enter the regulating flow channel 11 through the oblique flow channel 307 when the oil is delivered to the third chamber 306. The guiding effect of the oblique flow channel 307 can improve the flow efficiency of the oil.

[0038] In some embodiments of the present invention, such as Figure 1 , Figure 4 and Figure 5As shown, the main valve body 1 has two oil flow channels 102 and two oil inlets 101. Two check valve seats 2, two check valve assemblies 3, and two oil inlet connectors 4 are provided. The two check valve seats 2 and the two oil inlet connectors 4 are respectively located on both sides of the main valve body 1. The two check valve seats 2 are connected to the two oil inlets 101, and the two oil inlet connectors 4 are connected to the two check valve seats 2. The two check valve assemblies 3 are respectively located within the two check valve seats 2. With this structure, the fuel delivery ratio of the two oil flow channels 102 is controlled by the two check valve assemblies 3, achieving flow rate multiplication and pressure balance. Simultaneously, the two check valve assemblies 3 and the two oil flow channels 102 can operate independently, improving the fault tolerance of the fuel delivery valve and avoiding the risk of the entire fuel delivery valve failing when one check valve assembly 3 fails.

[0039] In some embodiments of the present invention, such as Figure 1 , Figure 4 and Figure 5 As shown, there are two adaptive oil regulating components 5. The regulating flow channels 11 of the two oil regulating components are respectively connected to the sealing cavities of the two one-way valve seats 2, and the baffles 503 of the two oil regulating components extend into the two oil flow channels 102 respectively. With this structure, the oil delivery channels in the two oil flow channels 102 can be adaptively adjusted by the two adaptive oil regulating components 5, which further improves the oil ratio regulation capability and fault tolerance capability of the oil delivery valve.

[0040] In some embodiments of the present invention, such as Figure 1 As shown, the regulating valve seat 501 includes a seat body and a top cover. The seat body is mounted on the main valve body, and the top cover and seat body are fastened together by fasteners. The seat body has a regulating oil chamber 12, which is sealed by the top cover. An annular protrusion is provided on the side of the top cover facing the seat body. A sealing ring is provided between the outer peripheral surface of the annular protrusion and the inner wall of the regulating oil chamber 12. A sealing ring is also provided between the outer peripheral surface of the pressure plate 502 and the inner wall of the regulating oil chamber 12. This structure, with the sealing ring between the outer peripheral surface of the annular protrusion and the inner wall of the regulating oil chamber 12, improves the sealing performance between the top cover and the seat body, preventing oil leakage. The sealing ring between the outer peripheral surface of the pressure plate 502 and the inner wall of the regulating oil chamber 12 improves the sealing performance between the pressure plate 502 and the seat body, preventing oil leakage from the upper chamber to the lower chamber.

[0041] In some embodiments of the present invention, the upper cover and the base body can be fastened together by a first fastener 6, which can be a bolt, screw or other fastener.

[0042] In some embodiments of the present invention, such as Figure 1As shown, the outer peripheral surface of the annular protrusion is sealed to the inner wall of the regulating oil chamber 12 by a first sealing ring 8, and the outer peripheral surface of the pressure plate 502 is sealed to the inner wall of the regulating oil chamber 12 by a first sealing ring 8.

[0043] In some embodiments of the present invention, a sealing ring is provided between the one-way valve seat 2 and the oil inlet connector 4. With this structure, the one-way valve seat 2 and the oil inlet connector 4 are sealed together by the sealing ring, which can improve the sealing performance between the one-way valve seat 2 and the oil inlet connector 4.

[0044] In some embodiments of the present invention, such as Figure 1 As shown, the one-way valve seat 2 and the oil inlet connector 4 are sealed together by the second sealing ring 9.

[0045] In some embodiments of the present invention, a third sealing ring 10 is further provided between the main valve body and the one-way valve seat 2. The main valve body and the one-way valve seat 2 are sealed together by the third sealing ring 10, which can improve the sealing performance between the main valve body and the one-way valve seat 2.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A mechanical fuel proportioning valve with adjustable flow rate, characterized in that, It includes a main valve body, a one-way valve seat, a one-way valve assembly, and an oil inlet connector. The main valve body is provided with an oil inlet, an oil flow channel, and an oil outlet. The two ends of the oil flow channel are respectively connected to the oil inlet and the oil outlet. The one-way valve seat is installed on the main valve body, and the oil inlet connector is installed on the one-way valve seat. The one-way valve seat has a sealing cavity, and the oil inlet connector has an oil inlet hole. One side of the sealing cavity is connected to the oil inlet hole of the oil inlet connector, and the other side of the sealing cavity is connected to the oil inlet of the main valve body. The one-way valve assembly is disposed in the sealing cavity. The one-way valve assembly includes a sealing cover and a first spring. The sealing cover is used to close the oil inlet hole of the oil inlet connector, and the first spring is used to apply an elastic force to the sealing cover so that the sealing cover presses against the end face of the oil inlet connector facing the one-way valve seat. The sealing cover includes a cover plate and an annular surrounding plate. The end faces of the cover plate and the annular surrounding plate are connected and form a receiving cavity. The opening of the receiving cavity faces the main valve body. One end of the first spring is located in the receiving cavity. The cover plate abuts against the end face of the oil inlet connector facing the one-way valve seat. The annular surrounding plate is provided with a through hole. The sealing cavity includes a first chamber, a second chamber, and a third chamber arranged sequentially. The first chamber, the second chamber, and the third chamber are all cylindrical cavities with decreasing diameters. The first chamber is used to communicate with the oil inlet hole, and the third chamber is used to communicate with the oil inlet. One end of the annular surrounding plate is located inside the second chamber and is limited to fit against the inner wall of the second chamber. There is a step between the second chamber and the third chamber. One end of the first spring is located inside the receiving cavity, and the other end abuts against the step. It also includes an adaptive oil adjustment component, which includes an adjustment valve seat, a pressure plate, a baffle, and a second spring. The regulating valve seat is disposed on the main valve body, and the regulating valve seat is provided with a regulating oil chamber. The pressure plate is disposed in the regulating oil chamber and divides the regulating oil chamber into an upper chamber and a lower chamber. The second spring is disposed in the lower chamber. The regulating valve seat and the main valve body are provided with through holes. One end of the through hole is connected to the lower chamber, and the other end of the through hole is connected to the oil flow channel. One end of the baffle is connected to the pressure plate, and the other end of the baffle extends through the through hole into the oil flow channel. The regulating valve seat is provided with a regulating flow channel, one end of which is connected to the upper chamber and the other end of which is connected to the sealing cavity.

2. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, The cover plate is a circular plate. The oil inlet, cover plate, annular surrounding plate, first chamber, second chamber and third chamber are all coaxially arranged. The diameter of the cover plate is larger than the diameter of the oil inlet, and the diameter of the third chamber is equal to the diameter of the oil inlet.

3. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, The regulating valve seat and the main valve body are an integral structure. The sealing cavity includes a first chamber, a second chamber and a third chamber arranged in sequence. The first chamber is used to communicate with the oil inlet hole, and the third chamber is used to communicate with the oil inlet. The one-way valve seat is provided with an oblique flow channel. One end of the oblique flow channel is connected to the third chamber and the other end is connected to the regulating flow channel.

4. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, The main valve body is provided with two oil flow channels and two oil inlets. There are two one-way valve seats, two one-way valve assemblies and two oil inlet connectors. The two one-way valve seats and the two oil inlet connectors are respectively located on both sides of the main valve body. The two one-way valve seats are respectively connected to the two oil inlets, the two oil inlet connectors are respectively connected to the two one-way valve seats, and the two one-way valve assemblies are respectively located inside the two one-way valve seats.

5. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 4, characterized in that, The adaptive oil regulating component is provided in two parts. The regulating flow channels of the two oil regulating components are respectively connected to the sealing cavities of the two one-way valve seats, and the baffles of the two oil regulating components extend into the two oil flow channels respectively.

6. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, The regulating valve seat includes a seat body and a top cover. The seat body is disposed on the main valve body. The top cover and the seat body are fastened together by fasteners. The regulating oil chamber is provided in the seat body. The top cover is used to close the regulating oil chamber. The upper cover has an annular protrusion on the side facing the seat, and a sealing ring is provided between the outer peripheral surface of the annular protrusion and the inner wall of the regulating oil chamber. A sealing ring is also provided between the outer peripheral surface of the pressure plate and the inner wall of the regulating oil chamber.

7. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, A sealing ring is provided between the one-way valve seat and the oil inlet connector.

Images