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CN-224229312-U - Switch valve, power fuel system and aircraft

CN224229312UCN 224229312 UCN224229312 UCN 224229312UCN-224229312-U

Abstract

The application discloses a switching valve, a power fuel system and an aircraft, and relates to the technical field of valves, comprising a valve body, a valve rod and a knob; the rotary knob is provided with a first state and a second state, wherein the first state of the rotary knob is that the rotary knob is connected with the valve rod, the rotary knob can drive the valve rod to rotate so as to control the oil supply of the power fuel system, the second state of the rotary knob is that the rotary knob is separated from the valve rod, and the rotary knob is movably connected with the valve rod so as to enable the rotary knob to be switched between the first state and the second state. According to the switch valve provided by the application, the knob is movably connected with the valve rod, so that the knob can be switched between the first state and the second state, the bad influence of vibration generated by the engine and the rotor on the switch valve can be avoided, the problem that the switch valve of the fuel system is automatically closed due to vibration is solved, and the normal oil supply of the power fuel system is ensured.

Inventors

  • LI JINGYANG
  • BAO CHANGCHUN
  • YIN MINGWEI
  • HAI RIHAN
  • XU ZHENHAN

Assignees

  • 北京清航紫荆装备科技有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (10)

  1. 1. A switching valve, characterized by comprising: a valve body (10) for installation on a fuel supply line of a power fuel system; A valve stem (20) located within the valve body (10), the valve stem (20) being for controlling the supply of fuel to the power fuel system; The knob (30), knob (30) have first state and second state, the first state of knob (30) be knob (30) with valve rod (20) are connected, just knob (30) can drive valve rod (20) rotate, in order to control power fuel oil system's fuel feeding, the second state of knob (30) is knob (30) break away from valve rod (20), knob (30) with valve rod (20) swing joint, so that knob (30) are in switch between first state and the second state.
  2. 2. The switching valve according to claim 1, wherein the knob (30) is connected to the valve stem (20) by a fastener (40), and the knob (30) is movable in a direction toward or away from the valve stem (20) by the fastener (40) to switch the knob (30) between the first state and the second state.
  3. 3. The switch valve according to claim 2, wherein a reset elastic member (50) is sleeved outside the fastener (40), one end of the reset elastic member (50) is abutted to the knob (30), and the other end of the reset elastic member (50) is abutted to the valve rod (20).
  4. 4. A valve according to claim 2, wherein the valve stem (20) is provided with a threaded bore (21) for cooperation with the fastener (40).
  5. 5. The on-off valve according to claim 2, characterized in that the knob (30) is provided with a countersink (31) for receiving the fastener (40).
  6. 6. The on-off valve according to claim 1, wherein the valve stem (20) has a first end and a second end arranged opposite, the first end of the valve stem (20) being provided with a flow hole (22) for the flow of fuel of the power fuel system, the second end of the valve stem (20) being adapted to cooperate with the knob (30) by means of a relief, so that the knob (30) drives the flow hole (22) of the valve stem (20) to switch between a direction perpendicular to the fuel supply line and a direction parallel to the fuel supply line.
  7. 7. The on-off valve according to claim 1, characterized in that the valve body (10) is provided with a groove (11) for cooperation with the knob (30), and that the end face of the knob (30) is provided with a projection (32) movable in the groove (11) so that the projection (32) of the knob (30) moves circumferentially in the groove (11).
  8. 8. The switch valve according to any one of claims 1 to 7, further comprising an adapter (60) connected to one end of the valve body (10), wherein the other end of the valve body (10) is used for being connected to an oil inlet hose of the power fuel system, and the adapter (60) is used for being connected to an oil outlet hose of the power fuel system.
  9. 9. A power fuel system, characterized by comprising a switching valve (100) according to any one of claims 1-8.
  10. 10. An aircraft comprising the power fuel system of claim 9.

Description

Switch valve, power fuel system and aircraft Technical Field The application relates to the technical field of valves, in particular to a switching valve, a power fuel system and an aircraft. Background In the related art, vibration is inevitably generated in an engine and a rotor of an aircraft, but the vibration causes an on-off valve of a fuel system to be automatically closed, so that the fuel system cannot supply fuel normally, the engine is stopped, and a crash accident of the aircraft is caused. Therefore, how to solve the problem that vibration causes the on-off valve of the fuel system to be automatically closed is a technical problem to be solved urgently by those skilled in the art. Disclosure of utility model In view of the above, the present application is directed to an on-off valve to solve the problem that the on-off valve of the fuel system is automatically closed due to vibration. Another object of the present application is to provide a power fuel system having the above-mentioned on-off valve. Another object of the application is to provide an aircraft with a power fuel system as described above. In order to achieve the above purpose, the present application provides the following technical solutions: A switching valve, comprising: The valve body is used for being arranged on an oil supply pipeline of the power fuel system; The valve rod is positioned in the valve body and is used for controlling the oil supply of the power fuel system; The knob is provided with a first state and a second state, the first state of the knob is that the knob is connected with the valve rod, the knob can drive the valve rod to rotate so as to control oil supply of the power fuel system, the second state of the knob is that the knob is separated from the valve rod, and the knob is movably connected with the valve rod so that the knob is switched between the first state and the second state. Optionally, in the above switch valve, the knob is connected to the valve stem by a fastener, and the knob is movable in a direction toward or away from the valve stem along the fastener to switch the knob between the first state and the second state. Optionally, in the above switch valve, a reset elastic member is sleeved on the outer side of the fastener, one end of the reset elastic member abuts against the knob, and the other end of the reset elastic member abuts against the valve rod. Optionally, in the above switch valve, a threaded hole that mates with the fastener is provided on the valve stem. Optionally, in the above switch valve, a countersink for receiving the fastener is provided on the knob. Optionally, in the above switch valve, the valve rod has a first end and a second end that are oppositely disposed, the first end of the valve rod is provided with a circulation hole through which fuel of the power fuel system circulates, and the second end of the valve rod is used for being matched with the knob in a concave-convex manner, so that the knob drives the circulation hole of the valve rod to switch between a direction perpendicular to the oil supply pipeline and a direction parallel to the oil supply pipeline. Optionally, in the above switch valve, a groove for matching with the knob is provided on the valve body, and a protrusion movable in the groove is provided on an end surface of the knob, so that the protrusion of the knob moves in the groove in a circumferential direction. Optionally, in the above switch valve, the valve further includes an adapter connected to one end of the valve body, the other end of the valve body is used for being connected to an oil inlet hose of the power fuel system, and the adapter is used for being connected to an oil outlet hose of the power fuel system. A power fuel system comprising an on-off valve as claimed in any one of the preceding claims. An aircraft comprising a power fuel system as described above. The switching valve provided by the application is arranged on an oil supply pipeline of a power fuel system through the valve body, and the valve rod is positioned in the valve body so as to control the oil supply of the power fuel system. At the same time, the knob may be movably coupled to the valve stem such that the knob may be switched between a first state and a second state. When the knob is in the second state, the knob is separated from the valve rod, and no matter how the knob rotates, the valve rod cannot be controlled to rotate, namely the fuel supply of the power fuel system cannot be controlled. According to the switch valve provided by the application, the knob is movably connected with the valve rod, so that the knob can be switched between the first state and the second state, the bad influence of vibration generated by the engine and the rotor on the switch valve can be avoided, the problem that the switch valve of the fuel system is automatically closed due to vibration is solved, and the normal oil supply of the power fuel system is ensured. The te