Mechanical fuel oil proportional oil conveying valve capable of automatically adjusting flow

Abstract

The invention discloses a mechanical fuel oil proportional oil delivery valve capable of automatically adjusting flow, and belongs to the field of fuel oil delivery equipment, the mechanical fuel oil proportional oil delivery valve comprises a main valve body, a one-way valve seat, a one-way valve assembly and an oil inlet connector, the main valve body is internally provided with an oil inlet, an oil liquid flow channel and an oil outlet, and the two ends of the oil liquid flow channel are connected with the oil inlet and the oil outlet respectively; 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. A sealing cavity is formed in the one-way valve seat, an oil inlet hole is formed in the oil inlet connector, one side of the sealing cavity is used for being communicated with the oil inlet hole of the oil inlet connector, the other side of the sealing cavity is communicated with an oil inlet of the main valve body, and the one-way valve assembly is arranged in the sealing cavity and comprises a sealing cover body and a first spring. The sealing cover body is used for sealing an oil inlet hole of the oil inlet connector, and the first spring is used for applying elastic acting force to the sealing cover body so that the sealing cover body can abut against the end face of the side, facing the one-way valve seat, of the oil inlet connector.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fuel delivery equipment, and particularly relates to a mechanical fuel proportional delivery valve capable of autonomously adjusting flow. BACKGROUND

[0002] In the process of fuel combustion in an aircraft fuel tank, accurate control of the flow of fuel in different fuel tanks plays a key role in the combustion efficiency, energy consumption and control of the center of gravity of the aircraft. Most of the currently common autonomous fuel proportional delivery valves need to rely on electronic control systems or external power sources to achieve flow adjustment. For example, an electrically controlled valve adjusts the opening of the valve to adjust the flow of fuel by receiving an electrical signal.

[0003] Although the fuel delivery valve relying on electronic components or external power can achieve adjustment of the flow of fuel, firstly, the electronic control system is complex, has a high cost, and is prone to failure in harsh environments (such as high temperature, high humidity, strong electromagnetic interference, etc.), and has low reliability. Secondly, when the external power source (such as a power supply) is abnormal, the fuel delivery valve cannot work normally, which seriously threatens flight safety. Therefore, there is an urgent need for a purely mechanical fuel proportional delivery valve capable of autonomously adjusting flow. SUMMARY

[0004] In order to solve the above problems in the prior art, the present application provides a mechanical fuel proportional delivery valve capable of autonomously adjusting flow. The technical problem to be solved by the present application is solved by the following technical scheme: In a first aspect, the present application provides a mechanical fuel proportional delivery valve capable of autonomously adjusting flow, comprising a main valve body, a one-way valve seat, a one-way valve assembly and an oil inlet joint, the main valve body being provided with an oil inlet, an oil flow channel and an oil outlet, the two ends of the oil flow channel being connected to the oil inlet and the oil outlet respectively, the one-way valve seat being installed on the main valve body, and the oil inlet joint being installed on the one-way valve seat. The one-way valve seat is provided with a sealing cavity, the oil inlet joint is provided with an oil inlet hole, one side of the sealing cavity is used for communication with the oil inlet hole of the oil inlet joint, the other side of the sealing cavity is in communication 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 closing the oil inlet hole of the oil inlet joint, and the first spring is used for applying an 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.

[0005] In an embodiment of the present application, the sealing cover body comprises 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 containing cavity, the opening of the containing cavity faces the main valve body, one end of the first spring is located in the containing cavity, the cover plate is pressed against the end face of the oil inlet joint on the side facing the one-way valve seat, and the annular surrounding plate is provided with a through hole.

[0006] In one embodiment of the present application, the sealing cavity comprises a first chamber, a second chamber and a third chamber arranged in sequence, the first chamber, the second chamber and the third chamber are cylindrical cavities and the diameters of the three chambers decrease in sequence, the first chamber is used for communicating with the oil inlet hole, the third chamber communicates with the oil inlet port, one end of the annular coaming is located in the second chamber and is limited by 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 in the accommodating cavity and the other end abuts on the step.

[0007] In one embodiment of the present application, the cover plate is a circular plate, the oil inlet hole, the cover plate, the annular coaming, the first chamber, the second chamber and the third chamber are coaxially arranged, the diameter of the cover plate is greater than the diameter of the oil inlet hole, and the diameter of the third chamber is equal to the diameter of the oil inlet port.

[0008] In one embodiment of the present application, the adaptive oil adjusting assembly further comprises an adjusting valve seat, a pressing plate, a partition piece and a second spring. The adjusting valve seat is arranged on the main valve body, the adjusting valve seat is provided with an adjusting oil cavity, the pressing plate is arranged in the adjusting oil cavity and separates the adjusting oil cavity into an upper chamber and a lower chamber, and the second spring is arranged in the lower chamber. The adjusting valve seat and the main valve seat are provided with a through hole, one end of the through hole communicates with the lower chamber, the other end of the through hole communicates with the oil flow channel, one end of the partition piece is connected with the pressing plate, and the other end of the partition piece extends out of the through hole into the oil flow channel. The adjusting valve seat is provided with an adjusting flow channel, one end of the adjusting flow channel communicates with the upper chamber, and the other end of the adjusting flow channel communicates with the sealing cavity.

[0009] In one embodiment of the present application, the adjusting valve seat and the main valve seat are an integral structure, the sealing cavity comprises a first chamber, a second chamber and a third chamber arranged in sequence, the first chamber is used for communicating with the oil inlet hole, the third chamber communicates with the oil inlet port, the one-way valve seat is provided with an inclined flow channel, one end of the inclined flow channel communicates with the third chamber, and the other end of the inclined flow channel communicates with the adjusting flow channel.

[0010] In one embodiment of the present application, the main valve body is provided with two oil flow channels and two oil inlet ports, the one-way valve seat, the one-way valve assembly and the oil inlet connector are provided with two, the two one-way valve seats and the two oil inlet connectors are arranged on the two sides of the main valve body, the two one-way valve seats respectively communicate with the two oil inlet ports, the two oil inlet connectors respectively communicate with the two one-way valve seats, and the two one-way valve assemblies are arranged in the two one-way valve seats.

[0011] In one embodiment of the present application, the adaptive oil adjusting assembly is provided with two, the adjusting flow channels of the two oil adjusting assemblies respectively communicate with the sealing cavities of the two one-way valve seats, and the partition pieces of the two oil adjusting assemblies respectively extend into the two oil flow channels.

[0012] In one embodiment of the present application, the adjusting valve seat comprises a seat body and an upper cover, the seat body is arranged on the main valve seat, the upper cover is fastened and connected with the seat body through fasteners, the seat body is provided with an adjusting oil cavity, and the upper cover is used for sealing the adjusting oil cavity. The side of the upper cover facing the seat body is provided with an annular protrusion, a sealing ring is arranged between the outer circumferential surface of the annular protrusion and the inner wall of the adjusting oil cavity, and a sealing ring is arranged between the outer circumferential surface of the pressing plate and the inner wall of the adjusting oil cavity.

[0013] In one embodiment of the present application, a sealing ring is arranged between the one-way valve seat and the oil inlet joint.

[0014] Compared with the prior art, the present application has the following beneficial effects: In the above scheme of the present application, first, when the oil liquid is input from the oil inlet hole of the oil inlet joint, it can be first accumulated in the oil inlet hole, when the pressure of the oil liquid reaches the preset value of the one-way valve assembly, the oil liquid exerts pressure on the sealing cover body to make the sealing cover body move towards the side of the main valve body and compress the first spring, and when the sealing cover body moves, it separates from the end surface of the oil inlet joint, at this time, the oil inlet hole and the sealing cavity are communicated, the oil liquid can flow into the sealing cavity from the space between the sealing cover plate and the end surface of the oil inlet joint, and then flow into the oil liquid flow channel through the sealing cavity and the oil inlet hole. Secondly, when the pressure of the oil liquid decreases to below the preset value of the one-way valve assembly, the spring pushes the sealing cover body to move and abut against the end surface of the oil inlet joint, at this time, the oil inlet hole and the sealing cavity are disconnected, preventing the oil liquid from entering the oil liquid flow channel, and achieving the cutting off of the oil liquid. At the same time, when the flow and pressure of the externally input oil liquid change, the sealing cover body will move towards or away from the end surface of the oil inlet joint, so as to adaptively adjust the size of the oil liquid flow aperture according to the flow and pressure of the externally input oil liquid, and then adaptively adjust the amount of oil liquid entering the main valve body, realizing the self-adaptive adjustment of the flow. The oil feeding valve in the present application adopts a pure mechanical structure, compared with the oil feeding valve in the prior art which relies on electronic components or external power, the oil feeding valve in the present application does not need an electronic control system, has low cost and high reliability, and does not rely on an external power source, so it will not cause the oil feeding valve to fail to work normally due to the abnormality of the external power source, thereby improving the flight safety of the aircraft.

[0015] The present application will be further described in detail below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

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

[0017] Reference signs: 1-main valve body, 101-oil inlet, 102-oil flow channel, 103-oil outlet, 2-one-way valve seat, 3-one-way valve assembly, 301-sealing cover body, 3011-cover plate, 3012-annular fence, 302-first spring, 303-through hole, 304-first cavity, 305-second cavity, 306-third cavity, 307-inclined flow channel, 4-oil inlet joint, 401-oil inlet hole, 5-adaptive oil regulating assembly, 501-regulating valve seat, 502-pressing plate, 503-barrier, 504-second spring, 6-first fastener, 7-second fastener, 8-first sealing ring, 9-second sealing ring, 10-third sealing ring, 11-regulating flow channel, 12-regulating oil cavity. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below with specific embodiments, but the embodiments of the present application are not limited thereto.

[0019] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the embodiment of the present application provides a mechanical fuel proportional oil delivery valve capable of autonomously adjusting flow, comprising a main valve body 1, a one-way valve seat 2, a one-way valve assembly 3 and an oil inlet joint 4, the main valve body 1 is provided with an oil inlet 101, an oil flow channel 102 and an oil outlet 103, the two ends of the oil flow channel 102 are connected with the oil inlet 101 and the oil outlet 103 respectively, the one-way valve seat 2 is installed on the main valve body 1, and the oil inlet joint 4 is installed on the one-way valve seat 2; the one-way valve seat 2 is provided with a sealing cavity, the oil inlet joint 4 is provided with an oil inlet hole 401, one side of the sealing cavity is used for communicating with the oil inlet hole 401 of the oil inlet joint 4, the other side of the sealing cavity communicates with the oil inlet 101 of the main valve body 1, the one-way valve assembly 3 is arranged in the sealing cavity, the one-way valve assembly 3 comprises a sealing cover body 301 and a first spring 302, the sealing cover body 301 is used for closing the oil inlet hole 401 of the oil inlet joint 4, and the first spring 302 is used for applying elastic force to the sealing cover body 301, so that the sealing cover body 301 is pressed against the end face of the oil inlet joint 4 on the side facing the one-way valve seat 2.

[0020] In some embodiments of the present application, the main valve body 1 and the one-way valve seat 2 are separately arranged, which facilitates the production and processing of the main valve body 1 and the one-way valve seat 2, and the main valve body 1 and the one-way valve seat 2 are both provided with an ear plate, the ear plate of the main valve body 1 and the ear plate of the one-way valve seat 2 are fastened and connected through a second fastener 7, and the second fastener 7 is a fastener such as a bolt or a screw.

[0021] In some embodiments of the present application, the front end of the one-way valve seat 2 is provided with a threaded hole, the rear end of the oil inlet joint 4 is provided with an external thread, the rear end of the oil inlet joint 4 extends into the threaded hole of the one-way valve seat 2 and is threadedly connected with the threaded hole of the one-way valve seat 2, and the outer periphery of the oil inlet joint 4 is provided with an annular block body which abuts against the front end surface of the one-way valve seat 2, so that the sealing property between the one-way valve seat 2 and the oil inlet joint 4 can be improved.

[0022] In some embodiments of the present application, the cross-sectional area of the sealing cover body 301 is greater than the area of the oil inlet hole 401, or the projection of the oil inlet hole 401 along the axial direction is located on the sealing cover body 301, so that the sealing cover body 301 can close the oil inlet hole 401 and prevent the oil from leaking from the gap between the sealing cover body 301 and the oil inlet joint 4.

[0023] In some embodiments of the present application, in the initial state, i.e. when the sealing cover body 301 abuts against the end surface of the oil inlet joint 4 on the side facing the one-way valve seat 2, the first spring 302 is in a compressed state, and the elastic force provided by the first spring 302 for the sealing cover body 301 can make the sealing cover body 301 tightly abut against the end surface of the oil inlet joint 4, and by using the first spring 302 of different types, materials and stiffness, the flow pressure of the one-way valve assembly 3 can be adjusted to adapt to different use environments and use requirements.

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

[0025] In the above scheme of the present application, first, when the oil liquid is input from the oil inlet hole 401 of the oil inlet joint 4, it can be first accumulated in the oil inlet hole 401, and when the pressure of the oil liquid reaches the preset value of the one-way valve assembly 3, the oil liquid exerts pressure on the sealing cover body 301 to make the sealing cover body 301 move towards one side of the main valve body 1 and compress the first spring 302, and when the sealing cover body 301 moves, it separates from the end face of the oil inlet joint 4, at this time, the oil inlet hole 401 and the sealing cavity are communicated, the oil liquid can flow into the sealing cavity from the space between the sealing cover plate 3011 and the end face of the oil inlet joint 4, and then flow into the oil liquid flow channel 102 through the sealing cavity and the oil inlet 101. Secondly, when the pressure of the oil liquid decreases to the preset value of the one-way valve assembly 3, the spring pushes the sealing cover body 301 to move and abut against the end face of the oil inlet joint 4, at this time, the oil inlet hole 401 and the sealing cavity are disconnected, preventing the oil liquid from entering the oil liquid flow channel 102, and achieving the cutting off of the oil liquid. At the same time, when the flow and pressure of the externally input oil liquid change, the sealing cover body 301 will automatically move towards or away from the end face of the oil inlet joint 4, so as to adaptively adjust the size of the oil liquid flow hole 303 gap according to the flow and pressure of the externally input oil liquid, and then adaptively adjust the amount of oil liquid entering the main valve body 1, realizing the autonomous adjustment of the flow. The oil feeding valve in the above scheme of the present application adopts a pure mechanical structure, compared with the oil feeding valve in the prior art which relies on electronic components or external power, the oil feeding valve in the above scheme of the present application does not need an electronic control system, has low cost and high reliability, and does not rely on an external power source, so it will not cause the oil feeding valve to fail to work normally due to the abnormality of the external power source, thereby improving the flight safety of the aircraft.

[0026] It can be understood that the oil feeding valve in the above scheme of the present application adopts a pure mechanical mechanism design, does not need electronic components and an external power source, avoids the problem that the electronic control system is prone to failure in harsh environments, greatly improves the reliability and stability of the oil feeding valve, and is suitable for various complex working environments. At the same time, the oil feeding valve in the above scheme of the present application can autonomously adjust the flow, has strong adaptability, can automatically adjust the fuel flow according to the change of the input pressure of the fuel system, realizes the proportional delivery of fuel in different tanks, does not need frequent manual intervention, and can adapt to the fuel flow demand under different working conditions. In addition, the oil feeding valve in the above scheme of the present application has simple structure and low cost, compared with the oil feeding valve relying on an electronic control system, the structure of the present application is simpler, the use of electronic components and complex control circuits is reduced, the production cost and maintenance cost are reduced, and the oil feeding valve has good market application prospect. Moreover, the oil feeding valve in the above scheme of the present application is convenient to operate and flexible to adjust, different flow control effects can be realized by replacing springs with different technical parameters such as stiffness, material, and elastic limit, and the diversified needs of different users and different working conditions can be met.

[0027] In some embodiments of the present application, as Figure 1 and Figure 3As shown, the sealing cover 301 comprises a cover plate 3011 and an annular enclosure 3012, the end faces of the cover plate 3011 and the annular enclosure 3012 are connected and the two enclose a containing cavity, the opening of the containing cavity faces the main valve body 1, one end of the first spring 302 is located in the containing cavity, the cover plate 3011 is pressed against the end face of the oil inlet joint 4 on the side facing the one-way valve seat 2, and the annular enclosure 3012 is provided with a through hole 303. With this structure, the containing cavity can provide installation and positioning space for the first spring 302, improving the stability of spring installation; the cover plate 3011 is pressed against the end face of the oil inlet joint 4, a static sealing interface can be formed; when the annular enclosure 3012 is provided with the through hole 303, in the case that the oil in the oil inlet hole 401 pushes the cover plate 3011 to move away from the oil inlet joint 4, the oil flows into the outside of the annular enclosure 3012 through the space between the cover plate 3011 and the oil inlet joint 4, and then flows into the containing cavity inside the annular enclosure 3012 through the through hole 303, and then flows into the oil flow channel 102 of the main valve body 1 through the containing cavity.

[0028] In some embodiments of the present application, the annular enclosure 3012 is provided with a plurality of through holes 303, and the plurality of through holes 303 are uniformly distributed along the circumference of the annular enclosure 3012.

[0029] In some embodiments of the present application, as shown in FIG. 6, the cover plate 3011 is provided with a plurality of through holes 3013, and the plurality of through holes 3013 are uniformly distributed along the circumference of the cover plate 3011. 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 in sequence, the first chamber 304, the second chamber 305 and the third chamber 306 are all cylindrical cavities and the diameters of the three chambers decrease in sequence, the first chamber 304 is used for communication with the oil inlet hole 401, the third chamber 306 is in communication with the oil inlet 101, one end of the annular coaming 3012 is located in the second chamber 305 and is limitedly matched with 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 in the accommodating cavity and the other end abuts on the step. With this structure, the annular coaming 3012 is limitedly matched with the inner wall of the second chamber 305, so that the second chamber 305 can limit the movement of the annular coaming 3012, the precision and stability of the installation of the sealing cover body 301 are improved, the sealing cover body 301 moves under the action of the oil pressure and can move along the inner wall of the second chamber 305, the movement track of the sealing cover body 301 is guided through the second chamber 305, the stability of the sealing cover body 301 when moving can be improved, and the stability of the spring located in the annular coaming 3012 can be improved. One end of the first spring 302 is located in the accommodating cavity and the other end abuts on the step, so that the first spring 302 can exert an elastic force on the sealing cover body 301, and when the oil pushes the sealing cover body 301 to move towards the main valve body 1, the compression amount of the first spring 302 increases, the elastic force exerted on the sealing cover body 301 increases, so that the self-adaptive adjustment of the flow rate can be realized. Moreover, an oil chamber can be formed between the first chamber 304 and the outer wall of the annular coaming 3012, so that when the cover plate 3011 moves away from the side of the oil inlet connector 4, the oil can first fill in the chamber to avoid excessive impact of the oil on the one-way valve assembly 3.

[0030] In some embodiments of the present application, as shown in Figure 1 、 Figure 2 and Figure 3 , the cover plate 3011 is a circular plate, the oil inlet hole 401, the cover plate 3011, the annular coaming 3012, the first chamber 304, the second chamber 305 and the third chamber 306 are coaxially arranged, the diameter of the cover plate 3011 is greater than the diameter of the oil inlet hole 401, and the diameter of the third chamber 306 is equal to the diameter of the oil inlet 101. With this structure, first of all, the coaxial arrangement of all components can form a straight flow channel, which significantly reduces turbulence and pressure loss; secondly, the coaxial structure ensures symmetrical stress and prevents lateral side wear, prolonging the service life of the oil delivery valve. Moreover, the diameter of the cover plate 3011 is greater than the diameter of the oil inlet hole 401, which can ensure that the cover plate 3011 can seal the oil inlet hole 401.

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

[0032] In some embodiments of the present application, as shown in Figure 1 、 Figure 4 and Figure 5 , the oil delivery valve further comprises an adaptive oil regulating assembly 5, which comprises a regulating valve seat 501, a pressing plate 502, a barrier 503 and a second spring 504; the regulating valve seat 501 is arranged on the main valve body 1, and the regulating valve seat 501 is provided with a regulating oil cavity 12; the pressing plate 502 is arranged in the regulating oil cavity 12 and separates the regulating oil cavity 12 into an upper chamber and a lower chamber; the second spring 504 is arranged in the lower chamber; the regulating valve seat 501 and the main valve seat are provided with a through hole, one end of the through hole is communicated with the lower chamber, and the other end of the through hole is communicated with the oil flow channel 102; one end of the barrier 503 is connected with the pressing plate 502, and the other end of the barrier 503 extends to the oil flow channel 102 through the through hole; the regulating valve seat 501 is provided with a regulating flow channel 11, one end of the regulating flow channel 11 is communicated with the upper chamber, and the other end of the regulating flow channel 11 is communicated with the sealing cavity.

[0033] It can be understood that when the oil pressure in the oil inlet hole 401 is greater than the initial elastic force of the first spring 302, the oil pushes the cover plate 3011 to move towards the main valve body 1, and an oil flow gap is formed between the cover plate 3011 and the oil inlet joint 4, and the oil flows into the first chamber 304 through the gap, and then flows into the third chamber 306 through the through hole 303 on the annular surrounding plate 3012; at this time, one path of the oil is to flow to the oil outlet 103 through the oil flow channel 102 of the main valve body 1, and the other path of the oil is to flow into the regulating oil cavity 12 through the regulating flow channel 11; the oil entering the regulating oil cavity 12 exerts pressure on the pressing plate 502, so that the pressing plate 502 drives the barrier 503 to move towards the oil flow channel 102, thereby blocking the oil in the oil flow channel 102 by the barrier 503 to reduce the oil flow rate from the oil outlet 103.

[0034] When the oil pressure in the oil inlet hole 401 is small, the cover plate 3011 moves towards the oil inlet joint 4 under the elastic force of the first spring 302, and the flow gap between the cover plate 3011 and the oil inlet joint 4 gradually decreases; at this time, the oil pressure in the one-way valve seat 2 decreases, and the pressing plate 502 in the adaptive oil regulating assembly 5 moves away from the oil flow channel 102 under the elastic force of the second spring 504; when the pressing plate 502 moves, it pushes the oil in the regulating oil cavity 12 to flow back, and at the same time, the pressing plate 502 also drives the barrier 503 to move away from the oil flow channel 102, thereby reducing the blocking effect of the barrier 503 and increasing the oil flow rate in the oil flow channel 102; in this way, the one-way valve assembly 3 and the adaptive oil regulating assembly 5 cooperate with each other, so that the oil delivery valve can adopt a dynamic "breathing" regulating mode to control the outlet flow rate within a preset range, realize self-regulation of the flow rate, and ensure the fuel outlet ratio.

[0035] When the oil pressure in the oil inlet hole 401 is less than the initial elastic force of the first spring 302, the cover plate 3011 is pressed against the end surface of the oil inlet joint 4 under the elastic force of the first spring 302, thereby closing the oil inlet hole 401 of the oil inlet joint 4, cutting off the oil flow path in the oil inlet hole 401, and stopping the delivery of oil.

[0036] It can be understood that when the fuel flows from the oil inlet hole 401 and the pressure reaches a preset value, the one-way valve is opened, and the fuel enters the one-way valve body along the one-way valve core. The fuel pressure is transmitted to the adjusting oil cavity 12 through the adjusting flow channel 11, and different sizes of pressure make the pressure plate 502 move downward against the spring force of the second spring 504, thereby adjusting the flow area of the internal diameter of the main valve body 1 to realize the control function of the fuel flow. To ensure a fixed fuel outflow ratio, when the inlet pressure is large and the flow is large, the pressure plate 502 receives greater pressure, and the displacement of the pressure plate 502 driving the barrier 503 downward is greater, and the fuel flow passing through is smaller, and vice versa. Even if the actual working condition of the fuel flow is always changing, this dynamic “breathing” adjustment can control the outlet flow within a preset range of values to realize self-adjusting regulation.

[0037] In some embodiments of the present application, as shown in Figure 1 、 Figure 4 and Figure 5 , the adjusting valve seat 501 and the main valve seat are integrated structures, the sealing cavity includes a first chamber 304, a second chamber 305 and a third chamber 306 arranged in sequence, the first chamber 304 is used for communication with the oil inlet hole 401, the third chamber 306 is in communication with the oil inlet 101, the one-way valve seat 2 is provided with an inclined flow channel 307, one end of the inclined flow channel 307 is in communication with the third chamber 306, and the other end is in communication with the adjusting flow channel 11. With this structure, when the adjusting valve seat 501 and the main valve seat are integrated structures, the overall strength is higher, and the integrated production and processing is more convenient. The one-way valve seat 2 is provided with an inclined flow channel 307, and when one end of the inclined flow channel 307 is in communication with the third chamber 306, under the condition that the oil is delivered into the third chamber 306, the oil will enter the adjusting flow channel 11 through the inclined flow channel 307. Through the guiding effect of the inclined flow channel 307, the flow efficiency of the oil can be improved.

[0038] In some embodiments of the present application, as shown in Figure 1 、 Figure 4 and Figure 5As shown, the main valve body 1 is provided with two oil flow channels 102 and two oil inlet ports 101, two one-way valve seats 2, two one-way valve assemblies 3 and two oil inlet joints 4, the two one-way valve seats 2 and the two oil inlet joints 4 are arranged on the two sides of the main valve body 1, the two one-way valve seats 2 are communicated with the two oil inlet ports 101 respectively, the two oil inlet joints 4 are communicated with the two one-way valve seats 2 respectively, and the two one-way valve assemblies 3 are arranged in the two one-way valve seats 2 respectively. By adopting the structure, the fuel delivery ratio of the two oil flow channels 102 can be controlled by the two one-way valve assemblies 3 respectively, the flow multiplication and pressure balance can be realized. Meanwhile, the two one-way valve assemblies 3 and the two oil flow channels 102 can work independently, the fault tolerance ability of the oil delivery valve is improved, and the risk of the whole oil delivery valve being disabled when one of the one-way valve assemblies 3 is disabled is avoided.

[0039] In some embodiments of the present application, as shown in Figure 1 、 Figure 4 and Figure 5 , the adaptive oil regulating assembly 5 is provided with two, the regulating flow channels 11 of the two oil regulating assemblies are communicated with the sealing cavities of the two one-way valve seats 2 respectively, and the blocking pieces 503 of the two oil regulating assemblies extend into the two oil flow channels 102 respectively. By adopting the structure, the delivery flow channels of the oil in the two oil flow channels 102 can be adaptively regulated by the two adaptive oil regulating assemblies 5 respectively, and the oil ratio regulating ability and the fault tolerance ability of the oil delivery valve are further improved.

[0040] In some embodiments of the present application, as shown in Figure 1 , the regulating valve seat 501 comprises a seat body and an upper cover, the seat body is arranged on the main valve seat, the upper cover and the seat body are fastened and connected by a fastener, the seat body is provided with a regulating oil cavity 12, and the upper cover is used for sealing the regulating oil cavity 12; the side of the upper cover facing the seat body is provided with an annular protrusion, a sealing ring is arranged between the outer peripheral surface of the annular protrusion and the inner wall of the regulating oil cavity 12, and a sealing ring is arranged between the outer peripheral surface of the pressing plate 502 and the inner wall of the regulating oil cavity 12. By adopting the structure, the outer peripheral surface of the annular protrusion and the inner wall of the regulating oil cavity 12 are sealed and connected by the sealing ring, the sealing property between the upper cover and the seat body can be improved, and the oil leakage is avoided. The outer peripheral surface of the pressing plate 502 and the inner wall of the regulating oil cavity 12 are sealed and connected by the sealing ring, the sealing property between the pressing plate 502 and the seat body can be improved, and the oil leakage from the upper chamber to the lower chamber is avoided.

[0041] In some embodiments of the present application, the upper cover and the seat body can be fastened and connected by a first fastener 6, and the first fastener 6 can be a bolt, a screw or the like.

[0042] In some embodiments of the present application, as shown in Figure 1As shown, the outer circumferential surface of the annular protrusion is sealed and connected with the inner wall of the adjusting oil cavity 12 by the first sealing ring 8, and the outer circumferential surface of the pressing plate 502 is sealed and connected with the inner wall of the adjusting oil cavity 12 by the first sealing ring 8.

[0043] In some embodiments of the present application, a sealing ring is arranged between the one-way valve seat 2 and the oil inlet joint 4. With this structure, the one-way valve seat 2 and the oil inlet joint 4 are sealed and connected by the sealing ring, which can improve the sealing between the one-way valve seat 2 and the oil inlet joint 4.

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

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

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0048] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The above is further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, and all of them shall be deemed as falling within the protection scope of the present application.

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.

2. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, 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 inside 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.

3. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 2, characterized in that, 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.

4. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 3, 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.

5. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 1, characterized in that, 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 seat 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 is connected to the sealing cavity.

6. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 5, characterized in that, The regulating valve seat and the main valve seat 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.

7. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 5, 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.

8. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 7, 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.

9. The self-adjustable flow rate mechanical fuel proportioning valve according to claim 5, characterized in that, The regulating valve seat includes a seat body and a top cover. The seat body is disposed on the main valve seat. 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.

10. 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