A pressure regulating assembly

Abstract

This invention discloses a pressure regulating assembly, including a lower housing, an upper housing, and a valve seat, as well as a high-pressure safety valve assembly, a low-pressure safety valve assembly, a vacuum valve assembly, a float assembly, and a spring mounted on the valve seat. The lower housing, upper housing, and valve seat are connected by screws. The lower housing has ports C and D as inlets, and the upper housing has ports A and B as outlets. The float assembly is equipped with a float, a gasket, a bracket, a valve seat, and a tungsten carbide ball. The valve seat has a groove for the tungsten carbide ball to roll, thereby pushing the float bracket to move, which in turn drives the high-pressure safety valve assembly and the low-pressure safety valve assembly to operate, ensuring that the residual pressure of the aircraft fuel tank is within a reasonable range throughout the entire flight profile. This product has a compact structure, high integration, small size, and light weight.

Description

Technical Field

[0001] This invention belongs to the field of aircraft fuel tank pressure control technology, specifically relating to a pressure regulating component. Background Technology

[0002] To increase an aircraft's altitude, it is usually necessary to pressurize the fuel tank to prevent vapor lock. When the aircraft is flying nose-down, the safety valve needs to be closed to reduce pressure. Currently, aircraft fuel systems typically use safety valves, anti-vacuum valve assemblies, attitude sensing valves, and other products to control fuel tank pressure. This not only results in a large number of products with limited functionality but also increases product weight and installation space. Summary of the Invention

[0003] The purpose of this invention is to provide a pressure regulating component that addresses the problems of existing oil tank pressure control valves having a large number of components, limited functions, and low integration.

[0004] The technical solution of this invention: A pressure regulating component, comprising an upper housing, a lower housing, and a valve seat, and a low-pressure safety valve assembly, a high-pressure safety valve assembly, a vacuum-proof valve assembly, and a float assembly mounted on the housing and valve seat. The upper housing, lower housing, and valve seat are connected by screws. The upper housing has outlets A and B (open to the atmosphere), and the lower housing has inlets C and D (open to the oil tank). The upper housing has a safety valve guide groove, within which the low-pressure and high-pressure safety valve assemblies can move back and forth.

[0005] Furthermore, both the low-pressure and high-pressure safety valve assemblies are equipped with grooves for placing fluorinated sealing rings. Springs are installed above both the low-pressure and high-pressure safety valve assemblies, and on the outside of the guide grooves. When the gas pressure reaches a certain level, the safety valves open to release pressure; when the gas pressure decreases to a certain value, the springs reset the safety valves. Sealing gaskets are provided on the lower end faces of both the low-pressure and high-pressure safety valve assemblies, and the springs compress them to ensure a tight seal between the sealing gaskets and the valve seats.

[0006] The lower housing is provided with a guide groove for the anti-vacuum valve assembly, which can move back and forth within the guide groove. An anti-vacuum spring is located above the anti-vacuum valve assembly. The anti-vacuum valve assembly has a sealing groove for placing a fluorinated sealing ring. When the pressure inside the oil tank is negative, the anti-vacuum valve assembly opens to replenish the oil tank with gas. When the pressure returns to normal, the anti-vacuum spring returns the anti-vacuum valve assembly to its original position. The lower end face of the anti-vacuum valve assembly is vulcanized with a rubber surface, which is pressed by the anti-vacuum spring to ensure a tight seal between the rubber surface and the valve seat.

[0007] Furthermore, the valve seat is provided with a low-pressure safety valve assembly sealing step, a high-pressure safety valve assembly sealing step, and a vacuum valve assembly sealing step. A large screw hole is provided in the center for installing and fixing the upper housing, and four small screw holes are provided for installing the float assembly.

[0008] Furthermore, the float assembly consists of a valve seat, a bracket, a float, a valve seat, and a tungsten carbide ball. The bracket and the float are riveted together. The valve seat has a groove in which the tungsten carbide ball slides. The float consists of a float base and a float push rod. The float push rod is located at the center of the top of the float base. The float base has several holes (hole 1) that engage with rivets. The valve seat has three supporting structures extending circumferentially in the upper part, connected at the center. The central connection has a hole (hole 2) that engages with the float push rod. The bottom of the valve seat also has an extension (hole 1) with several holes (hole 3). The bottom of the valve seat has a connecting end with several holes (hole 4). Holes 4 and 3 are fixedly connected by screws (screw 2). The valve seat has an extension (hole 2) near the top with several holes (hole 5) that engage with screws (hole 1) for fixed connection.

[0009] The valve seat is equipped with a sliding groove. When the product tilts, the tungsten steel ball can roll in the sliding groove, thereby pushing the float, gasket and bracket to move up and down.

[0010] Furthermore, the valve seat has a groove at a 17° angle to the horizontal. When the product tilts 20°, the tungsten carbide ball rolls to the end of the valve seat groove, pushing the float, gasket, and bracket to completely cover the low-pressure safety valve. Once the low-pressure safety valve is completely covered, only the high-pressure safety valve operates, and the oil tank pressure rises to the high-pressure valve opening pressure. When the product returns to its upright position, the tungsten carbide ball returns to its initial position along the valve seat groove, the float, gasket, and bracket fall, and the low-pressure safety valve resumes operation.

[0011] Furthermore, the low-pressure safety valve assembly and the high-pressure safety valve assembly are provided with fluorine-coated sealing ring grooves at the connection points with the guide groove, and the vacuum valve assembly is provided with fluorine-coated sealing ring grooves at the connection points with the guide groove; the lower end face of the low-pressure safety valve assembly, the lower end face of the high-pressure safety valve assembly, and the upper end face of the vacuum valve assembly are all provided with sealing gaskets.

[0012] Furthermore, both the low-pressure safety valve assembly and the high-pressure safety valve assembly are equipped with slots for placing springs.

[0013] The beneficial effects of this invention are:

[0014] The present invention has the following positive effects: the pressure regulating component of the present invention integrates safety valve, anti-vacuum valve component, attitude sensing valve and other products to control fuel tank pressure, ensuring that the residual pressure of the aircraft fuel tank is within a reasonable range throughout the entire flight profile. The product has a compact structure, high integration, small size and light weight. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0016] Figure 1 This is a schematic diagram of the voltage regulating component provided by the present invention;

[0017] Figure 2 for Figure 1 Section II;

[0018] Figure 3 for Figure 1 Section II-II;

[0019] Figure 4 for Figure 1 Section III-III;

[0020] Figure 5 This is a schematic diagram of the float assembly structure provided by the present invention;

[0021] Figure 6 for Figure 5 AA cross-section view;

[0022] Figure 7 for Figure 5 BB cross-section;

[0023] Figure 8 for Figure 5 CC cross-section;

[0024] Figure 9 A top view of the valve seat provided by the present invention;

[0025] Figure 10 for Figure 9 DD cross-section;

[0026] Figure 11 for Figure 9 EE cross-section;

[0027] Figure 12 This is a top view of the valve seat 2 in the float assembly provided by the present invention;

[0028] Figure 13 for Figure 12 FF cross-section

[0029] Figure 14 Schematic diagram of the float assembly tilting at 20° provided by the present invention

[0030] In the attached diagram: 1-lower housing, 11-guide groove three.

[0031] 2-Upper shell, 21-Guide groove one, 22-Guide groove two

[0032] 3-Float assembly, 31-Valve seat, 32-Bracket, 33-Float, 34-Valve seat II, 35-Tungsten carbide ball, 36-Rivet, 37-Screw II, 311-Groove, 312-Extension I, 313-Hole III, 331-Float base, 332-Float push rod, 333-Hole I, 341-Support structure, 342-Hole II, 343-Connecting end, 344-Hole IV, 345-Extension II, 346-Hole V

[0033] 4-Valve seat 1, 41-Sealing step,

[0034] 5-Low-pressure safety valve assembly, 51-Freon-coated sealing ring 1, 52-Sealing gasket, 53-Spring 1, 54-Slot 1,

[0035] 6-High-pressure safety valve assembly, 61-Spring 2, 62-Slot 2

[0036] 7-Anti-vacuum valve assembly, 71-Spring 3, 72-Freon-coated sealing ring

[0037] 8 - Countersunk screw, 9 - Screw 1, 10 - Screw 3, A - Outlet 1, B - Outlet 2, C - Inlet 1, D - Inlet 2, R - Inclination angle. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the invention will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0039] Please see Figure 1-8Figure 14 shows a schematic diagram of the pressure regulating assembly structure provided by the present invention, including a lower housing 1, an upper housing 2, a float assembly 3, a valve seat 4, a low-pressure safety valve assembly 5, a high-pressure safety valve assembly 6, and a vacuum-proof valve assembly 7; the valve seat 4 is located in the middle of the lower housing 1 and the upper housing 2 and is connected around its perimeter by several countersunk screws 8, and is connected at its center by a screw 10; the float assembly 3 is located at the bottom of the valve seat 4 and is fixedly connected to the lower housing 1 by screws 9; the lower housing 1 has an inlet C and an inlet D, the inlet C is located on one side of the lower housing 1, the inlet D is located at the bottom of the lower housing 1, and the float assembly 3 is located on the side away from the inlet C. The lower housing 1 has symmetrical guide grooves 11 on both sides of its middle position, which cooperate with the anti-vacuum valve assembly 7. The upper housing 2 has outlets A and B symmetrically arranged at both ends of its side near inlet C. The upper housing 2 also has a guide groove 21 on its side near outlets A and B, which cooperates with the high-pressure safety valve assembly 6, and a guide groove 22 on its other side, which cooperates with the low-pressure safety valve assembly 5. A spring 61 is provided on the outside of the guide groove 21, and a spring 53 is provided on the outside of the guide groove 22. A spring 71 is provided on the outside of each guide groove 11. The low-pressure safety valve assembly 5, the high-pressure safety valve assembly 6, and the anti-vacuum valve assembly 7 can move back and forth within the guide grooves. A sealing step 41 is provided on the valve seat 4, which cooperates with the sealing gasket 52 of the low-pressure safety valve assembly 5, the high-pressure safety valve assembly 6, and the anti-vacuum valve assembly 7 for sealing. The low-pressure safety valve assembly 5 and the high-pressure safety valve assembly 6 are both provided with fluorinated sealing ring grooves at their connections to the guide groove for placing fluorinated sealing ring 51; the anti-vacuum valve assembly 7 is also provided with fluorinated sealing ring grooves at its connection to the guide groove 11 for placing fluorinated sealing ring 72; the lower end face of the low-pressure safety valve assembly 5, the lower end face of the high-pressure safety valve assembly 6, and the upper end face of the anti-vacuum valve assembly 7 are all provided with sealing gaskets 52. The low-pressure safety valve assembly 5 is provided with a retaining groove 54, and the bottom of the spring 53 is placed in the retaining groove 54; the high-pressure safety valve assembly 6 is provided with a retaining groove 62, and the bottom of the spring 61 is placed in the retaining groove 62. The screw 10 is fitted with a washer and a sealing ring.

[0040] The anti-vacuum valve assembly 7 is equipped with a sealing groove for placing the fluorinated sealing ring 72. When the pressure inside the oil tank is negative, the anti-vacuum valve assembly 7 opens to replenish the oil tank with gas. When the pressure is restored, the anti-vacuum spring 71 resets the anti-vacuum valve assembly. The lower end face of the anti-vacuum valve assembly 7 is vulcanized with a rubber surface. The anti-vacuum spring 71 presses the rubber surface to seal it against the valve seat 4.

[0041] The float assembly 3 consists of a valve seat 31, a bracket 32, a float 33, a valve seat 34, and a tungsten carbide ball 35. The bracket 32 ​​and the float 33 are riveted together and fixed by rivets 36. The valve seat 31 is provided with a groove 311, in which the tungsten carbide ball 35 slides. The float 33 consists of a float base 331 and a float push rod 332. The float push rod 332 is located at the top center of the float base 331. The float base 331 is provided with several holes 333, which cooperate with the rivets 36. The valve seat 31 in the float assembly 3 is provided with a groove 311 with an inclination angle of 17°. When the product is tilted at 20° ( Figure 14 As shown, the tungsten carbide ball 35 can roll within the slide groove 311, thereby pushing the float 33 upward. The float 33 moves until it covers the low-pressure safety valve assembly 5. When the low-pressure safety valve is completely covered, only the high-pressure safety valve operates, and the oil tank pressure rises to the high-pressure valve opening pressure. When the product returns to its original position, the tungsten carbide ball 35 returns to its initial position along the valve seat slide groove 311, the float 33 and the bracket 32 ​​fall down, and the low-pressure safety valve resumes operation.

[0042] like Figure 12-13 The diagram shows the structure of valve seat 2. Valve seat 2 34 has three supporting structures 341 extending circumferentially in the upper part, connected at the center. A hole 342 at the center connection point allows for movable engagement with the float push rod 332. The bottom of valve seat 31 also has an extension 312 with several holes 313. The bottom of valve seat 2 34 has a connecting end 343 with four holes 344 and four holes 313, fixedly connected by screws 37. Near the top of valve seat 2 34, there is an extension 345 with four holes 346, fixedly connected by screws 9.

[0043] Figure 9-11 This is a schematic diagram of the valve seat structure. The sliding groove 311 forms an angle R with the horizontal direction, and the angle R is 17°. The bottom of the valve seat 31 has an extension 312, and the extension 312 has four holes 313.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, are all covered within the scope of the claims of the present invention.

Claims

1. A voltage regulating component, characterized in that: The system includes a lower housing (1), an upper housing (2), a float assembly (3), a valve seat (4), a low-pressure safety valve assembly (5), a high-pressure safety valve assembly (6), and a vacuum valve assembly (7). The valve seat (4) is located between the lower housing (1) and the upper housing (2) and is connected around its perimeter by several countersunk screws (8), with the center connected by screw three (10). The float assembly (3) is located at the bottom of the valve seat (4) and is fixedly connected to the lower housing (1) by screw one (9). The lower housing (1) has an inlet one (C) and an inlet two (D), with the inlet one (C) located in the lower housing. On one side of the body (1), the second inlet (D) is located at the bottom of the lower housing (1), and the float assembly (3) is located inside the side away from the first inlet (C). The lower housing (1) has guide grooves (11) symmetrically arranged on both the front and rear sides at the middle position to cooperate with the anti-vacuum valve assembly (7). The upper housing (2) has outlets (A) and outlets (B) symmetrically arranged at both the front and rear ends on the side near the first inlet (C). The upper housing (2) also has guide groove (21) on the side near outlets (A) and (B) to cooperate with the high-pressure safety valve assembly (6), and guide groove (22) on the other side to cooperate with the low-pressure safety valve assembly (6). The safety valve assembly (5) is equipped with a spring 2 (61) on the outside of the first guide groove (21) and a spring 1 (53) on the outside of the second guide groove (22); spring 3 (71) is provided on the outside of the third guide groove (11); the low-pressure safety valve assembly (5), the high-pressure safety valve assembly (6), and the anti-vacuum valve assembly (7) can move back and forth in the guide groove; the float assembly (3) is composed of a valve seat (31), a bracket (32), a float (33), a valve seat 2 (34), and a tungsten steel ball (35), and the bracket (32) and the float (33) are riveted together by rivets (36); the valve seat ( 31) A sliding groove (311) is provided on the upper part, and the tungsten steel ball (35) slides in the sliding groove (311); the float (33) is composed of a float base (331) and a float push rod (332), the float push rod (332) is located at the top center of the float base (331), the float base (331) is provided with several holes (333), the holes (333) cooperate with the rivets (36); the upper part of the valve seat (34) is provided with three support structures (341) connected at the center, and the center connection is provided with holes (342) that cooperate with the float push rod (332);The valve seat (31) is further provided with an extension portion one (312) at the bottom, and the extension portion one (312) is provided with several holes three (313). The valve seat two (34) is provided with a connecting end (343) at the bottom, and the connecting end (343) is provided with several holes four (344). The holes four (344) and holes three (313) are fixedly connected by screw two (37). The valve seat two (34) is provided with an extension portion two (345) near the top, and the extension portion two (345) is provided with several holes five (346). The holes five (346) are fixedly connected with screw one (9).

2. The voltage regulating component according to claim 1, characterized in that: The low-pressure safety valve assembly (5) and the high-pressure safety valve assembly (6) are provided with fluorinated sealing ring grooves at the connection with the guide groove for placing fluorinated sealing ring one (51); the vacuum valve assembly (7) is provided with fluorinated sealing ring grooves at the connection with the guide groove three (11) for placing fluorinated sealing ring two (72); the lower end face of the low-pressure safety valve assembly (5), the lower end face of the high-pressure safety valve assembly (6), and the upper end face of the vacuum valve assembly (7) are all provided with sealing gaskets (52).

3. The voltage regulating component according to claim 1, characterized in that: The low-pressure safety valve assembly (5) is provided with a slot 1 (54), and the bottom of the spring 1 (53) is placed in the slot 1 (54). The high-pressure safety valve assembly (6) is provided with a slot 2 (62), and the bottom of the spring 2 (61) is placed in the slot 2 (62).

4. The voltage regulating component according to claim 1, characterized in that: The valve seat (4) is provided with a sealing step (41) which cooperates with the sealing gasket (52) of the low-pressure safety valve assembly (5), the high-pressure safety valve assembly (6), and the anti-vacuum valve assembly (7) to seal.

5. The voltage regulating component according to claim 1, characterized in that: The groove (311) is inclined at an angle (R) to the horizontal direction, and the angle (R) is 17°.

6. The voltage regulating component according to claim 1, characterized in that: The screw three (10) is fitted with a washer and a sealing ring.

7. The voltage regulating component according to claim 1, characterized in that: The fifth hole (346) is provided in four pairs with the first screw (9), and the fourth hole (344) and the third hole (313) are provided in four pairs with the second screw (37).

8. The voltage regulating component according to claim 1, characterized in that: One of the screws is three (10).

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