Split type electric three-way valve and fuel system

Abstract

The invention provides a split type electric three-way valve and a fuel system, a valve body in the split type electric three-way valve is provided with a first pipeline, a second pipeline and a third pipeline which are connected with a fuel guide pipe, the first pipeline and the second pipeline are fuel inlets, and the third pipeline is a fuel outlet; a transmission rod is arranged between the valve body and the electric mechanism, and the electric mechanism transmits torque to the valve body through the transmission rod. The valve body and the electric mechanism are connected with the transmission rod through key grooves. The valve body is mounted in the oil tank; the electric mechanism is positioned outside the oil tank; switching of two circulation states can be achieved, in the first circulation state, fuel oil flows in from the first pipeline and flows out through the third pipeline, when the electric mechanism receives an external driving signal, torque is transmitted to the valve element through the transmission rod, the valve element is driven to rotate by 90 degrees anticlockwise, the valve element is switched into the second circulation state, and the fuel oil flows out through the third pipeline. According to the three-way valve, the safety and the maintainability of the three-way valve are improved, and meanwhile the system weight and the design difficulty are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation technology fuel system, and in particular relates to a split type electric three-way valve and a fuel system. Background Art

[0002] Currently, all three-way valves are of an integrated structure. This type of three-way valve is installed in the oil tank, which has poor maintainability. In addition, the electric mechanism is located in the oil tank, so the explosion-proof design of the electric structure needs to be considered. In addition, compared with the electric valve installed outside the oil tank, the safety is poor.

[0003] Although the pipeline control of the three-way valve can be achieved through a two-way split electric valve, the overall pipeline will be more complicated and the overall weight will increase. The joint control of the two split electric valves is also more complicated and technically difficult.

[0004] In order to improve the safety and maintainability of a three-way valve and reduce the system weight and design difficulty, the present invention provides a split electric three-way valve for an aircraft. Summary of the invention

[0005] In order to solve the technical problems in the prior art that the three-way valve is installed in the oil tank, which is poor in maintainability and safety, and the two-way split electric valve has complex pipelines and high control technology difficulty, the present invention provides a three-way split electric three-way valve with high safety, high maintainability and low design difficulty. The technical solution is as follows:

[0006] In a first aspect, a split-type electric three-way valve is provided, comprising: a valve body and an electric mechanism;

[0007] The valve body is provided with a first pipeline, a second pipeline and a third pipeline connected to the fuel pipe.

[0008] The first and second pipelines are fuel inlets, and the third pipeline is fuel outlet.

[0009] The valve body is fixedly connected to the electric mechanism;

[0010] A transmission rod is provided between the valve body and the electric mechanism, and the electric mechanism transmits the torque to the valve body through the transmission rod;

[0011] The valve body and the electric mechanism are connected to the transmission rod through a keyway;

[0012] The valve body is installed in the oil tank, and the electric mechanism is located outside the oil tank.

[0013] In one possible implementation, the valve body includes a left end cover, a valve core, a housing, and a right end cover;

[0014] The left end cover and the valve core are located in the housing, the valve core is connected to the inner side of the housing through a bearing, and the left end cover and the right end cover are fixed on the housing, corresponding to the first pipeline and the third pipeline respectively.

[0015] One end of the transmission rod is clamped in the clamping groove of the valve core, the housing is connected to the electric mechanism, and the housing is connected to the transmission rod through a key groove.

[0016] In the present invention, in the first flow state, the fuel flows into the first pipeline and flows out through the third pipeline. When the electric mechanism receives an external driving signal, the torque is transmitted to the valve core through the transmission rod, driving the valve core to rotate 90° counterclockwise, so that the valve body is switched to the second flow state, and the fuel flows into the second pipeline and flows out through the third pipeline.

[0017] Furthermore, a flange is provided at the connection between the second pipeline, the valve body and the electric mechanism, and the valve body is fixed to the oil tank wall plate through the second pipeline flange and the flange at the connection with the electric mechanism.

[0018] Furthermore, a flange at the connection between the valve body and the electric mechanism is provided with a plurality of bolts, and the flange at the connection between the valve body and the electric mechanism is first fixed to the oil tank wall plate by a part of the bolts.

[0019] Furthermore, the electric mechanism is provided with a flange. After the remaining bolts on the flange at the connection between the valve body and the electric mechanism pass through the oil tank wall plate, the flange of the electric mechanism passes through the remaining bolts extending from the oil tank wall plate to be fixedly connected to the valve body. Through this mechanism, the concentric connection between the electric mechanism 3 and the valve body 1 can be ensured, thereby improving the transmission efficiency.

[0020] The left end cover and the right end cover are fixed to the shell by fasteners.

[0021] The housing is connected to the electric mechanism through bolts.

[0022] The electric mechanism is connected to the valve body through a fastener.

[0023] In a second aspect, a fuel system is provided, comprising a split electric three-way valve as described in any one of the first aspects.

[0024] The beneficial effects of the present invention are at least:

[0025] The present invention provides a split electric three-way valve for aircraft, which is installed in a split manner, with mechanical structures such as a valve body installed in a fuel tank, and live equipment such as an electric mechanism installed outside the fuel tank, thereby improving the safety and maintainability of the entire equipment; at the same time, the state switching is achieved through the three-way structural form; the entire split three-way valve has good maintainability, high safety, and light weight, and can draw on the experience of a split electric ball valve, with low technical difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a split type electric three-way valve;

[0027] Figure 2 It is an exploded diagram of the split type electric three-way valve;

[0028] Figure 3 It is the first flow state of the three-way valve;

[0029] Figure 4 It is the second flow state of the three-way valve;

[0030] Figure 5 Schematic diagram of the valve body mounting flange;

[0031] Among them: 1. valve body, 1-1. left end cover, 1-2. valve core, 1-3. shell, 1-4. right end cover, 2. transmission rod, 3. electric mechanism. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below through specific implementation modes and drawings.

[0033] like Figure 1 , Figure 2 As shown, an embodiment of the present invention provides a split electric three-way valve for aircraft, comprising: a valve body 1, a transmission rod 2, and an electric mechanism 3;

[0034] The valve body 1 is provided with a first pipeline, a second pipeline and a third pipeline connected to the fuel pipe. The first pipeline and the second pipeline are fuel inlets, and the third pipeline is a fuel outlet.

[0035] The valve body 1 is fixedly connected to the electric mechanism 3 . For example, the electric mechanism 3 can be connected to the valve body 1 by bolts.

[0036] A transmission rod 2 is provided between the valve body 1 and the electric mechanism 3 , and the electric mechanism 3 transmits torque to the valve body 1 through the transmission rod 2 .

[0037] The valve body 1 and the electric mechanism 3 are connected to the transmission rod 2 through a keyway.

[0038] In one possible implementation, Figure 2 As shown, the valve body 1 includes: a left end cover 1-1, a valve core 1-2, a shell 1-3, and a right end cover 1-4;

[0039] The left end cover 1-1 and the valve core 1-2 are located in the shell 1-3. The valve core 1-2 is connected to the inner side of the shell 1-3 through a bearing. The left end cover 1-1 and the right end cover 1-4 are fixed to the shell 1-3 by screws, corresponding to the first pipeline and the third pipeline respectively. One end of the transmission rod 2 is clamped in the groove of the valve core 1-2. The shell 1-3 is connected to the electric mechanism 3 by bolts, and the shell 1-3 is connected to the transmission rod 2 by a keyway.

[0040] like Figure 3 , Figure 4 As shown, there are two flow states of the three-way valve.

[0041] The first flow state is that the fuel flows in from the first pipeline (i.e., inlet 1) and flows out through the third pipeline (i.e., outlet). When the electric mechanism 3 receives an external driving signal, the torque is transmitted to the valve core 1-2 through the transmission rod 2, driving the valve core 1-2 to rotate 90° counterclockwise, so that the valve body 1 switches to the second flow state, and the fuel flows in from the second pipeline (i.e., inlet 2) and flows out through the third pipeline (i.e., outlet).

[0042] The specific structure of the valve core 1-2 can be referred to in the relevant technology, and the embodiment of the present invention will not be described in detail.

[0043] In another embodiment, further, in order to improve the concentricity and thus improve the transmission efficiency, as Figure 5 As shown, a flange is provided at the connection between the second pipeline (i.e., inlet 2), the valve body 1 and the electric mechanism, and the valve body 1 is fixed to the oil tank wall plate through the flange of the second pipeline (i.e., inlet 2) and the flange at the connection with the electric mechanism. A plurality of bolts are provided on the flange at the connection between the valve body 1 and the electric mechanism, and the flange at the connection between the valve body 1 and the electric mechanism is first fixed to the oil tank wall plate through a part of the bolts. The electric mechanism 3 is provided with a flange, and after the remaining bolts on the flange at the connection between the valve body 1 and the electric mechanism pass through the oil tank wall plate, the flange of the electric mechanism 3 passes through the remaining bolts extending from the oil tank wall plate to be fixedly connected to the valve body 1. This mechanism can ensure the concentric connection between the electric mechanism 3 and the valve body 1, thereby improving the transmission efficiency.

[0044] In summary, the present invention provides a split electric three-way valve for aircraft, which is installed in a split manner, with the valve body and other mechanical structures installed in the fuel tank, and the electric mechanism and other live equipment installed outside the fuel tank, thereby improving the safety and maintainability of the entire equipment; at the same time, the state switching is realized through the three-way structure; the entire split three-way valve has good maintainability, high safety, and light weight, and can draw on the experience of the split electric ball valve, with low technical difficulty.

[0045] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. In addition, the parts not detailed in the present invention are all conventional technologies.

Claims

1. A split type electric three-way valve, characterized in that: include: A valve body and an electric mechanism; the valve body is provided with a first pipeline, a second pipeline and a third pipeline connected to the fuel conduit, the first pipeline and the second pipeline are the fuel inlet, the third pipeline is the fuel outlet, and the valve body is fixedly connected to the electric mechanism; a transmission rod is provided between the valve body and the electric mechanism, and the electric mechanism transmits the torque to the valve body through the transmission rod; the valve body and the electric mechanism are connected to the transmission rod through a keyway; the valve body is installed in the fuel tank, and the electric mechanism is located outside the fuel tank.

2. The split type electric three-way valve according to claim 1, characterized in that: The valve body includes a left end cover, a valve core, a shell, and a right end cover; wherein the left end cover and the valve core are located in the shell, the valve core is connected to the inner side of the shell through a bearing, the left end cover and the right end cover are fixed on the shell, corresponding to the first pipeline and the third pipeline respectively, one end of the transmission rod is clamped in the slot of the valve core, the shell is connected to the electric mechanism, and the shell is connected to the transmission rod through a key slot.

3. The split type electric three-way valve according to claim 2, characterized in that: In the first flow state, the fuel flows into the first pipeline and flows out through the third pipeline. When the electric mechanism receives an external driving signal, the torque is transmitted to the valve core through the transmission rod, driving the valve core to rotate 90° counterclockwise, so that the valve body switches to the second flow state, and the fuel flows into the second pipeline and flows out through the third pipeline.

4. The split type electric three-way valve according to claim 1, characterized in that: A flange is provided at the connection between the second pipeline, the valve body and the electric mechanism, and the valve body is fixed to the oil tank wall plate through the second pipeline flange and the flange at the connection with the electric mechanism.

5. The split type electric three-way valve according to claim 4, characterized in that: A flange at the connection between the valve body and the electric mechanism is provided with a plurality of bolts, and the flange at the connection between the valve body and the electric mechanism is first fixed to the oil tank wall plate by a part of the bolts.

6. The split type electric three-way valve according to claim 5, characterized in that: The electric mechanism is provided with a flange. After the remaining bolts on the flange at the connection between the valve body and the electric mechanism pass through the oil tank wall plate, the flange of the electric mechanism passes through the remaining bolts extending from the oil tank wall plate to be fixedly connected with the valve body.

7. The split type electric three-way valve according to claim 2, characterized in that: The left end cover and the right end cover are fixed to the housing through fasteners, and the housing is connected to the electric mechanism through bolts.

8. The split type electric three-way valve according to claim 1, characterized in that: The electric mechanism is connected to the valve body through fasteners.

9. A fuel system, characterized in that: It comprises the split electric three-way valve as described in any one of claims 1 to 8.

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