Aerial pressure regulator of unmanned aerial vehicle

Abstract

The utility model discloses an unmanned aerial vehicle air-launch pressure adjusting device which comprises a body, a pressure adjusting device and a pressure adjusting device. The body is provided with an air inlet channel, a containing cavity and an air outlet channel which are communicated in sequence. The quantitative sliding sleeve is internally sleeved in the air inlet channel, and a through hole is formed in the middle; the quantitative sliding sleeve limits the sliding displacement of the quantitative sliding sleeve through an air inlet channel and a limiting piece; the pressing and rotating piece is located in the containing cavity, and the upper end of the pressing and rotating piece is arranged in the through hole of the quantitative sliding sleeve; the upper end face of the pressing and rotating piece is matched with the inner side face of the through hole, and frosted protrusions are arranged on the upper end face of the pressing and rotating piece and the inner wall of the through hole. When the pressing and rotating piece and the quantitative sliding sleeve extrude each other, the upper end face of the pressing and rotating piece is seamlessly attached to the inner wall of the through hole; the reset unit is arranged in the containing cavity and controls the pressing and rotating piece to move on the axis of the quantitative sliding sleeve. High-pressure gas generated by knocking in the combustion chamber is leaked, the impact force generated by the high-pressure gas to the movement of the piston is reduced, and vibration generated by knocking is reduced.

Description

Technical Field

[0001] The utility model relates to the field of aero-engine pressure regulation, and particularly relates to a pressure regulator for an unmanned aerial vehicle (UAV) aero-engine. Background Art

[0002] The aero-engine of an unmanned aerial vehicle generally uses heavy oil as fuel. Its structure is roughly the same as that of a conventional fuel engine, and it also generates power through combustion, which is completed in the combustion chamber. During the long-term operation of the engine, if engine knocking occurs, it will affect the stability of the engine operation and even damage the engine, and at the same time, obvious vibrations will be generated on the airframe. At present, within the adjustable knocking range of the engine, the ECU will adjust the ignition time to reduce knocking. However, when knocking is caused by other reasons or exceeds the adjustment range of the ECU, the knocking will continue to occur. For special-purpose unmanned aerial vehicles, the vibrations generated by knocking will affect the clarity and stability of image acquisition, and reduce the reliability of mission execution. Summary of the Utility Model

[0003] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a pressure regulator for a UAV aero-engine, which leaks the high-pressure gas generated by knocking in the combustion chamber, reduces the impact force on the piston movement generated by the high-pressure gas, and reduces the vibrations generated by knocking; and maintains the airtightness when the regulator is not working during multiple leakage processes.

[0004] The purpose of the utility model is achieved by such a technical solution:

[0005] A pressure regulator for a UAV aero-engine includes:

[0006] A body, which is provided with an air inlet passage, a receiving cavity and an air outlet passage that are connected in sequence;

[0007] A quantitative sliding sleeve, which is sleeved inside the air inlet passage of the body, has a through hole in the middle, and is slidably connected to the inner wall of the air inlet passage without a gap;

[0008] A pressing and rotating part, which is located in the receiving cavity, and its upper end is arranged in the through hole of the quantitative sliding sleeve; the upper end surface of the pressing and rotating part matches the inner side surface of the through hole, and both the upper end surface of the pressing and rotating part and the inner wall of the through hole are provided with abrasive protrusions; when the pressing and rotating part and the quantitative sliding sleeve are mutually extruded, the upper end surface of the pressing and rotating part fits with the inner wall of the through hole without a gap;

[0009] A reset unit is arranged in the accommodating cavity and controls the pressing and rotating member to move along the axis of the quantitative sliding sleeve. When the reset unit releases the reset force, the pressing and rotating member is screwed and rotated under the action of the reset unit to squeeze towards the quantitative sliding sleeve, and the quantitative sliding sleeve moves quantitatively along its sliding direction until the movement is limited. The pressing and rotating member squeezes and seals with the inner wall of the through hole, and the air inlet passage is cut off from the air outlet passage. When the reset unit stores energy, the pressing and rotating member is screwed and rotated to move away from the quantitative sliding sleeve, and the quantitative sliding sleeve moves synchronously with the pressing and rotating member along its sliding direction until the movement is limited. The pressing and rotating member separates from the inner wall of the through hole, and the air inlet passage is communicated with the air outlet passage.

[0010] Further, a concave stepped hole is provided on the inner wall of the air inlet passage. A guide rail along the air inlet passage is provided on the inner wall of the stepped hole. The quantitative sliding sleeve is arranged in the stepped hole, and a guide groove matching the guide rail is provided on the outer surface of the quantitative sliding sleeve. The front end face of the quantitative sliding sleeve faces the stepped face of the stepped hole, and the front end of the quantitative sliding sleeve facing the air inlet direction of the air inlet passage is exposed in the air inlet passage.

[0011] A limiting member for limiting the rear end face of the quantitative sliding sleeve is arranged in the accommodating cavity. The distance between the limiting member and the stepped face of the stepped hole is greater than the length of the quantitative sliding sleeve.

[0012] Further, the limiting member is annular, fixed in the accommodating cavity by screws, sleeved outside the pressing and rotating member. The disk surface of the limiting member faces the tail end of the quantitative sliding sleeve, and the projection of the rear end face of the quantitative sliding sleeve along its sliding direction is located on the limiting member.

[0013] Further, the air inlet passage is cylindrical. The quantitative sliding sleeve is a circular tube, and a guide groove matching the guide rail is provided on the outer cylindrical surface. The inner wall of the through hole is frustum-shaped, and the smaller opening end faces the air inlet passage. The upper end of the pressing and rotating member is frustum-shaped, and its frustum surface matches the inner wall of the through hole of the quantitative sliding sleeve.

[0014] Further, the pressing and rotating member includes:

[0015] A spinning column is arranged in the accommodating cavity, and its axis is parallel to the displacement direction of the quantitative sliding sleeve.

[0016] A spiral guide convex is arranged on the outer cylindrical surface of the spinning column.

[0017] A spinning head has a frustum-shaped upper end and a jack matching the spinning column at the lower end. A spiral groove matching the spiral guide convex is provided on the inner wall of the jack. The spinning head is sleeved on the spinning column and rotates in a spiral manner when moving along the axis of the spinning column. A balance air passage communicating the bottom of the jack with the outside of the spinning head is provided on the spinning head. The reset unit is located at the end of the spinning head and controls the spinning head to move along the axis of the quantitative sliding sleeve.

[0018] Further, the pressing and spinning member further includes a shielding sleeve, which is tubular. The inner wall of the head end is fixedly connected to the outer surface of the spinning head, and the tail end is seamlessly slidably connected to the body. The spinning head, the inner wall of the accommodating cavity, and the spinning column enclose a closed space; the reset unit and the spinning column are located in the closed space; there is a vent hole on the spinning column or the body of the main body to communicate the closed space with the outside of the main body.

[0019] Further, the shielding sleeve is tubular, and the inner wall of the head end is fixedly connected to the outer surface of the spinning head; an annular groove is provided on the inner wall of the accommodating cavity; the tail end of the shielding sleeve is inserted into the annular groove.

[0020] Further, the shielding sleeve is frustum-shaped, the inner wall of the head end is fixedly connected to the outer surface of the spinning head, and an annular accommodating and clamping groove is provided on the end face of the tail end; an annular lip seal is provided in the accommodating and clamping groove, and the lip seal abuts against the inner wall of the accommodating cavity.

[0021] Further, the balance air passage sequentially includes a fixed air passage, a diameter-expanding passage, and a plugging passage from the bottom of the jack to the outside of the spinning head; the cross-section of the diameter-expanding passage is rectangular, and the cross-section of the end of the diameter-expanding passage is circular; the diameter of the plugging passage is not less than the diameter of the diameter-expanding passage;

[0022] The spinning head further includes:

[0023] A plug head, which is connected to the inside of the plugging passage by a thread; a plurality of through air holes are provided on the plug head; the air holes communicate the outside of the spinning head with the diameter-expanding passage;

[0024] An air bead, which is oval in shape and is arranged in the diameter-expanding passage, and the minimum diameter is greater than the width of the fixed air passage.

[0025] Further, the main body includes:

[0026] An upper body, which is provided with an air inlet passage at the front end and a concave upper cavity at the lower end;

[0027] A lower body, which is provided with a concave lower cavity at the upper end; the upper body and the lower body are fixedly connected together by a thread; the upper cavity and the lower cavity enclose an accommodating cavity; an air outlet passage communicating with the outside is provided on the lower cavity or the upper cavity; a threaded hole communicating with the accommodating cavity is provided at the lower end of the lower body; the lower end of the spinning column is threadedly connected to the threaded hole; an inner hexagonal hole is provided at the lower end of the spinning column.

[0028] Due to the adoption of the above technical solutions, the utility model has the following advantages:

[0029] 1. When the high pressure exceeding the predetermined value appears in the combustion chamber, pressure relief is carried out to reduce the vibration amount of detonation, improve the fuselage stability of the unmanned aerial vehicle, and protect the engine at the same time.

[0030] 2. During the pressure relief process and the recovery process, the pressure-rotating part will rotate relative to the metering sliding sleeve during both the compression displacement and the reset process. This causes impurities remaining in the high-pressure gas that previously flowed between the pressure-rotating part and the metering sliding sleeve (which will form carbon deposits over time) to be relatively rubbed, stripping the impurities adhering to the upper end face of the pressure-rotating part and the inner wall of the through-hole, and carrying them away with the flow of the high-pressure gas. This ensures the tightness between the upper end face of the pressure-rotating part and the inner wall of the through-hole, and the tightness of the combustion chamber when there is no detonation, thus ensuring the normal operation of the engine.

[0031] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings of the present utility model are described as follows:

[0033] Figure 1 It is a schematic cross-sectional structure diagram when the pressure regulating device of the UAV aero-engine in Embodiment 1 is closed.

[0034] Figure 2 is Figure 1 the enlarged structure diagram at A in

[0035] Figure 3 is Figure 1 the enlarged structure diagram at B in

[0036] Figure 4 is Figure 3 the enlarged structure diagram at C in

[0037] Figure 5 is Figure 1 the cross-sectional structure diagram at D-D in

[0038] Figure 6 It is a schematic cross-sectional structure diagram during the pressure relief process when the pressure regulating device of the UAV aero-engine in Embodiment 1 is opened.

[0039] Figure 7 It is a schematic cross-sectional structure diagram after the pressure regulating device of the UAV aero-engine in Embodiment 1 is opened and the pressure is relieved.

[0040] Figure 8 It is a schematic cross-sectional structure diagram when the pressure regulating device of the UAV aero-engine in Embodiment 2 is closed.

[0041] Figure 9 is Figure 8 the enlarged structure diagram at E in

[0042] In the figure: 1. Body; 11. Upper body; 111. Air inlet duct; 112. Step hole; 113. Guide rail; 12. Lower body; 121. Annular groove; 13. Accommodation cavity; 14. Air outlet duct; 2. Quantitative sliding sleeve; 21. Through hole; 22. Guide groove; 31. Spinning column; 311. Hexagon socket head cap screw hole; 32. Spiral guide convex; 33. Spinning head; 331. Jack; 332. Spiral groove; 3331. Fixed air duct; 3332. Diameter-expanded duct; 3333. Plug duct; 334. Plug; 3341. Air outlet hole; 335. Air bead; 4. Reset unit; 5. Limiting part; 6. Shielding sleeve; 61. Accommodation clamping groove; 62. Lip seal ring; 7. Closed space; 8. Ventilation hole. Specific embodiments

[0043] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments.

[0044] Embodiment 1:

[0045] As Figures 1 to 7 shown, a method for adjusting the pressure of an unmanned aerial vehicle engine can be realized by this device, specifically including:

[0046] A body is provided with an air inlet duct 111, an accommodation cavity 13 and an air outlet duct 14 that are connected in sequence;

[0047] A quantitative sliding sleeve 2 is sleeved inside the air inlet duct 111 of the body, and a through hole 21 is provided in the middle, which is in seamless sliding connection with the inner wall of the air inlet duct 111;

[0048] A pressing and spinning part is located in the accommodation cavity 13, and its upper end is arranged in the through hole 21 of the quantitative sliding sleeve 2; the upper end surface of the pressing and spinning part matches the inner side surface of the through hole 21, and both the upper end surface of the pressing and spinning part and the inner wall of the through hole 21 are provided with abrasive protrusions; when the pressing and spinning part and the quantitative sliding sleeve 2 are mutually extruded, the upper end surface of the pressing and spinning part is in seamless fit with the inner wall of the through hole 21;

[0049] A reset unit 4 (spring) is arranged in the accommodation cavity 13 to control the movement of the pressing and spinning part on the axis of the quantitative sliding sleeve 2; when the reset unit 4 releases the reset force, the pressing and spinning part is extruded towards the quantitative sliding sleeve 2 by screwing and rotating under the action of the reset unit 4, and the quantitative sliding sleeve 2 moves quantitatively along its sliding direction until the movement is limited, and the pressing and spinning part is in sealing extrusion with the inner wall of the through hole 21, and the air inlet duct 111 and the air outlet duct 14 are cut off; when the reset unit 4 stores energy, the pressing and spinning part moves away from the quantitative sliding sleeve 2 by screwing and rotating, and the quantitative sliding sleeve 2 moves synchronously with the pressing and spinning part along its sliding direction until the movement is limited, and the pressing and spinning part is separated from the inner wall of the through hole 21, and the air inlet duct 111 and the air outlet duct 14 are communicated.

[0050] The upper end surface of the pressing and spinning part and the inner wall of the through hole 21 are sprayed with emery on their surfaces by a high-speed sandblasting machine, so that the surface forms a granular feeling of abrasives.

[0051] When the high pressure exceeding the predetermined value appears in the combustion chamber, the utility model relieves the pressure, reduces the vibration amount of detonation, improves the fuselage stability of the unmanned aerial vehicle, and protects the engine at the same time. During the pressure relief process and the recovery process, the pressure rotating part will rotate relative to the quantitative sliding sleeve 2 during the compression displacement and reset process, so that the impurities remaining in the high-pressure gas flowing through between the pressure rotating part and the quantitative sliding sleeve 2 before (which will form carbon deposits in the long term) can be relatively rubbed, and the impurities adhering to the upper end face of the pressure rotating part and the inner wall of the through hole 21 are peeled off and carried away with the flow of the high-pressure gas, thereby ensuring the tightness between the upper end face of the pressure rotating part and the inner wall of the through hole 21, ensuring the tightness of the combustion chamber when there is no detonation, and thus ensuring the normal operation of the engine.

[0052] In this embodiment, the inner wall of the air inlet passage 111 is provided with a concave stepped hole 112; the inner wall of the stepped hole 112 is provided with a guide rail 113 along the air inlet passage 111; the quantitative sliding sleeve 2 is arranged in the stepped hole 112, and a guide groove 22 matching the guide rail 113 is arranged on the outer surface of the quantitative sliding sleeve 2; the front end face of the quantitative sliding sleeve 2 is opposite to the stepped face of the stepped hole 112, and the front end of the quantitative sliding sleeve 2 facing the air inlet direction of the air inlet passage 111 is exposed in the air inlet passage 111;

[0053] A limiting member 5 for limiting the rear end face of the quantitative sliding sleeve 2 is arranged in the accommodating cavity 13; the distance between the limiting member 5 and the stepped face of the stepped hole 112 is greater than the length of the quantitative sliding sleeve 2; the limiting member 5 is annular, fixed in the accommodating cavity 13 by screws, sleeved outside the pressure rotating part, the disk surface of the limiting member 5 faces the tail end of the quantitative sliding sleeve 2, and the projection of the rear end face of the quantitative sliding sleeve 2 along its sliding direction is located on the limiting member 5.

[0054] The quantitative sliding sleeve 2 is accommodated in the stepped hole 112 and is limited to slide through the guide groove 22 and the guide rail 113; by exposing the front end of the quantitative sliding sleeve 2 facing the air inlet direction of the air inlet passage 111 in the air inlet passage 111, the pressure of the high-pressure gas can act to make the quantitative sliding sleeve 2 slide.

[0055] In this embodiment, the air inlet passage 111 is cylindrical; the quantitative sliding sleeve 2 is a circular tube, a guide groove 22 matching the guide rail 113 is arranged on the outer cylindrical surface, the inner wall of the through hole 21 is frustum-shaped, and the smaller opening end faces the air inlet passage 111; the upper end of the pressure rotating part is frustum-shaped, and its frustum surface matches the inner wall of the through hole 21 of the quantitative sliding sleeve 2.

[0056] In this embodiment, the pressure rotating part includes:

[0057] A spinning column 31, arranged in the accommodating cavity 13, and its axis is parallel to the displacement direction of the quantitative sliding sleeve 2;

[0058] The spiral guiding convex 32 is arranged on the outer cylindrical surface of the spinning column 31;

[0059] The spinning head 33 has a frustum-shaped upper end and a jack 331 matching the spinning column 31 at the lower end; a spiral groove 332 matching the spiral guiding convex 32 is arranged on the inner wall of the jack 331; the spinning head 33 is sleeved on the spinning column 31 and rotates spirally when moving along the axis of the spinning column 31; a balance air passage communicating the bottom of the jack 331 with the outside of the spinning head 33 is arranged on the spinning head 33; the reset unit 4 is located at the end of the spinning head 33 and controls the movement of the spinning head 33 on the axis of the quantitative sliding sleeve 2.

[0060] Through the cooperation of the spiral groove 332 and the spiral guiding convex 32, when the spinning head 33 moves up and down along the spinning column 31, it rotates around the axis of the spinning column 31, so that the inner wall of the through hole 21 of the spinning head 33 and the quantitative sliding sleeve 2 rubs relatively, scraping loose or scraping off the adsorbed impurities, etc.

[0061] In this embodiment, the pressing and spinning member further includes a shielding sleeve 6, which is tubular, the inner wall of the head end is fixedly connected to the outer surface of the spinning head 33, and the tail end is slidably connected to the body seamlessly; a closed space 7 is formed by the spinning head 33, the inner wall of the accommodating cavity 13, and the spinning column 31; the reset unit 4 and the spinning column 31 are located in the closed space 7; an air vent 8 communicating the closed space 7 with the outside of the body is arranged on the spinning column 31 or the body of the present invention.

[0062] The shielding sleeve 6 can prevent the high-pressure gas with impurities (heavy oil and other substances generated by combustion) from contacting the reset unit 4 and the moving surfaces of the spinning head 33 and the spinning column 31, so that the movement of the spinning head 33 is affected by the impurities.

[0063] In this embodiment, the shielding sleeve 6 is tubular, and the inner wall of the head end is fixedly connected to the outer surface of the spinning head 33; an annular groove 121 is arranged on the inner wall of the accommodating cavity 13; the tail end of the shielding sleeve 6 is inserted into the annular groove 121. In this embodiment, the balance air passage sequentially includes a fixed air passage 3331, a diameter-expanded passage 3332, and a plugging passage 3333 from the bottom of the jack 331 to the outside of the spinning head 33; the cross-section of the diameter-expanded passage 3332 is rectangular, and the cross-section of the end of the diameter-expanded passage 3332 is circular; the diameter of the plugging passage 3333 is not less than the diameter of the diameter-expanded passage 3332;

[0064] The spinning head 33 further includes:

[0065] A plug head 334 is connected in the plugging passage 3333 by a thread; a plurality of through air holes 3341 are arranged on the plug head 334; the air holes 3341 communicate the outside of the spinning head 33 with the diameter-expanded passage 3332;

[0066] The air bead 335, in an oval shape, is arranged in the diameter-expanding channel 3332, and its minimum diameter is greater than the width of the fixed air channel 3331.

[0067] With the above arrangement, when the gas inside the jack 331 is discharged, it can be discharged quickly. When the jack 331 needs to be filled with gas, part of it will be blocked by the air bead 335, making the gas entering the jack 331 blocked. In this way, when relieving pressure, the spinning head 33 can be quickly separated from the quantitative sliding sleeve 2. When resetting, under the action of the reset unit 4, the gas entering the jack 331 is blocked, causing a negative pressure to be formed inside the jack 331, generating a certain resistance to the rising of the spinning head 33, thereby reducing the impact force between the spinning head 33 and the sliding sleeve, as well as the impact force of the quantitative sliding sleeve 2 on the stepped surface of the stepped hole 112.

[0068] In this embodiment, the body includes:

[0069] The upper body 11, with an air inlet channel 111 at the front end and a concave upper cavity at the lower end;

[0070] The lower body 12, with a concave lower cavity at the upper end; the upper body 11 and the lower body 12 are fixed together by threaded connection; the upper cavity and the lower cavity enclose a receiving cavity 13; an air outlet channel 14 communicating with the outside is provided on the lower cavity or the upper cavity; a threaded hole communicating with the receiving cavity 13 is provided at the lower end of the lower body 12; the lower end of the spinning column 31 is threadedly connected in the threaded hole; an internal hexagonal hole 311 is provided at the lower end of the spinning column 31.

[0071] Through the internal hexagonal hole 311, the depth of the spinning column 31 extending into the receiving cavity 13 can be adjusted, that is, the elastic force of the reset unit 4 (the compression amount of the spring) can be adjusted, thereby controlling the pressure value required for the displacement of the spinning head 33, that is, controlling the lower limit of the pressure relief of detonation.

[0072] In this embodiment, the pressure regulator of the UAV aero-engine is used as follows. When the pressure is too high and pressure relief is required, the pressure-spinning part that blocks the pressure relief channel is separated from the quantitative sliding sleeve 2. Specifically:

[0073] The high-pressure gas pushes the quantitative sliding sleeve 2 to displace;

[0074] The high-pressure gas pushes the pressure-spinning part to displace, and at the same time it rotates, and at the same time the reset unit 4 (the spring) stores energy;

[0075] When the pressure-spinning part and the quantitative sliding sleeve 2 move synchronously, the pressure-spinning part and the quantitative sliding sleeve 2 rotate relative to each other;

[0076] After the quantitative sliding sleeve 2 displaces to a given distance, the quantitative sliding sleeve 2 stops displacing, and the pressure-spinning part continues to be pushed by the high-pressure cylinder to displace, so that the pressure-spinning part is separated from the quantitative sliding sleeve 2, allowing the high-pressure gas to flow out from the gap between the pressure-spinning part and the quantitative sliding sleeve 2;

[0077] After the pressure relief is completed, the control pressure rotating part abuts against the metering sliding sleeve 2 to block the pressure relief channel. Specifically:

[0078] The reset unit 4 (spring) pushes the pressure rotating part to reset and rotates during the reset process;

[0079] After the pressure rotating part contacts the metering sliding sleeve 2, it pushes the metering sliding sleeve 2 to displace synchronously with the pressure rotating part, and the pressure rotating part and the metering sliding sleeve 2 rotate relative to each other;

[0080] After the metering sliding sleeve 2 moves to the given position, the pressure rotating part abuts against the metering sliding sleeve 2 to close it.

[0081] Embodiment 2:

[0082] As Figures 8 - 9 shown, the difference between this embodiment and Embodiment 1 is only that the end face of the tail end of the shielding sleeve 6 is provided with an annular accommodation and clamping groove 61; an annular lip seal 62 is arranged in the accommodation and clamping groove 61, and the lip seal 62 abuts against the inner wall of the accommodation cavity 13.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A UAV engine pressure regulator, characterized in that: include: The main body is provided with an air inlet, a receiving cavity and an air outlet which are connected in sequence; A quantitative sliding sleeve, which is sleeved inside the air inlet of the main body, has a through hole in the middle, and is seamlessly slidably connected with the inner wall of the air inlet; The pressing and rotating member is located in the accommodating cavity, and its upper end is arranged in the through hole of the quantitative sliding sleeve; the upper end surface of the pressing and rotating member matches the inner side surface of the through hole, and the upper end surface of the pressing and rotating member and the inner wall of the through hole are both provided with frosted protrusions; when the pressing and rotating member and the quantitative sliding sleeve are pressed against each other, the upper end surface of the pressing and rotating member and the inner wall of the through hole are seamlessly fitted; The reset unit is arranged in the accommodating chamber to control the rotating part to move on the axis of the quantitative sliding sleeve; when the reset unit releases the reset force, the rotating part spirally rotates under the action of the reset unit to squeeze the quantitative sliding sleeve, and the quantitative sliding sleeve moves quantitatively along its sliding direction until the movement is limited, the rotating part and the inner wall of the through hole are squeezed and sealed, and the air inlet and the air outlet are separated; when the reset unit accumulates force, the rotating part spirally rotates to move away from the quantitative sliding sleeve, and the quantitative sliding sleeve moves synchronously with the rotating part along its sliding direction until the movement is limited, the rotating part is separated from the inner wall of the through hole, and the air inlet and the air outlet are connected.

2. The UAV engine pressure regulator according to claim 1, characterized in that: The inner wall of the air inlet is provided with an inwardly concave stepped hole; the inner wall of the stepped hole is provided with a guide rail along the air inlet; the quantitative sliding sleeve is arranged in the stepped hole, and the outer surface of the quantitative sliding sleeve is provided with a guide groove matching the guide rail; the front end surface of the quantitative sliding sleeve is directly opposite to the stepped surface of the stepped hole, and the front end of the quantitative sliding sleeve facing the air inlet direction of the air inlet is exposed in the air inlet; A limiting piece for limiting the rear end surface of the quantitative sliding sleeve is arranged in the accommodating cavity; the distance between the limiting piece and the stepped surface of the stepped hole is greater than the length of the quantitative sliding sleeve.

3. The UAV engine pressure regulator according to claim 2, characterized in that: The limiting member is annular and fixed in the accommodating cavity by screws. The sleeve is arranged outside the pressing and rotating member. The disk surface of the limiting member faces the tail end of the quantitative sliding sleeve. The projection of the tail end surface of the quantitative sliding sleeve along its sliding direction is located on the limiting member.

4. The UAV engine pressure regulator according to claim 1, characterized in that: The air inlet is cylindrical; the quantitative sliding sleeve is a circular tube, and a guide groove matching the guide rail is provided on the outer cylindrical surface, the inner wall of the through hole is a truncated cone, and the smaller opening end faces the air inlet; the upper end of the pressure rotating part is a truncated cone, and its truncated cone surface matches the inner wall of the through hole of the quantitative sliding sleeve.

5. The UAV engine pressure regulator according to claim 1, characterized in that: The pressing and rotating part comprises: A spinning column is arranged in the accommodating cavity, and its axis is parallel to the displacement direction of the quantitative sliding sleeve; A spiral guide protrusion is arranged on the outer cylindrical surface of the spinning column; The spinning head has a truncated cone shape at the upper end and a socket matching the spinning column at the lower end; the inner wall of the socket is provided with a spiral groove matching the spiral guide protrusion; the spinning head is sleeved on the spinning column and rotates spirally when moving along the axis of the spinning column; the spinning head is provided with a balancing airway connecting the bottom of the socket and the outside of the spinning head; the reset unit is located at the end of the spinning head to control the movement of the spinning head on the axis of the quantitative sliding sleeve.

6. The UAV engine pressure regulator according to claim 5, characterized in that: The pressing and spinning part also includes a shielding sleeve, which is tubular, with the inner wall of the head end fixedly connected to the outer surface of the spinning head, and the tail end seamlessly slidably connected to the main body. The spinning head, the inner wall of the accommodating cavity, and the spinning column form a closed space; the reset unit and the spinning column are located in the closed space; the main body spinning column or the main body is provided with a vent hole that connects the closed space to the outside of the main body.

7. The UAV engine pressure regulator according to claim 6, characterized in that: The shielding sleeve is tubular, and the inner wall of the head end is fixedly connected to the outer surface of the spinning head; the inner wall of the accommodating cavity is provided with an annular groove; the tail end of the shielding sleeve is inserted into the annular groove.

8. The UAV engine pressure regulator according to claim 6, characterized in that: The shielding sleeve is in a truncated cone shape, the inner wall of the head end is fixedly connected to the outer surface of the spinning head, and the end face of the tail end is provided with an annular accommodating card embedding groove; an annular lip sealing ring is provided in the accommodating card embedding groove, and the lip sealing ring is against the inner wall of the accommodating cavity.

9. The UAV engine pressure regulator according to claim 6, characterized in that: The balancing air channel includes a fixed air channel, an expanding channel, and a plug channel in sequence from the bottom of the jack to the outside of the spinning head; the cross section of the expanding channel is rectangular, and the cross section of the end of the expanding channel is circular; the diameter of the plug channel is not less than the diameter of the expanding channel; The spinning head also includes: The plug is connected to the plug channel through threads; the plug is provided with a plurality of through-holes; the vents connect the outside of the spinning head with the expansion channel; The gas ball is oval in shape and is arranged in the expansion channel, and its minimum diameter is larger than the width of the fixed gas channel.

10. The UAV engine pressure regulator according to claim 5, characterized in that: The body comprises: The upper body has an air inlet at the front end and a concave upper cavity at the lower end; The lower body has a concave lower cavity at the upper end; the upper body and the lower body are fixed together by threaded connection; the upper cavity and the lower cavity form a accommodating cavity; the lower cavity or the upper cavity is provided with an air outlet connected to the outside; the lower end of the lower body is provided with a threaded hole connected to the accommodating cavity; the lower end of the spinning column is threadedly connected in the threaded hole; the lower end of the spinning column is provided with a hexagonal hole.

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