Duct flow control valve and power generation device

Abstract

The utility model discloses a duct flow control valve and a power generation device, and relates to the technical field of fluid control. Comprising a duct, a valve body fixed in the duct, a valve element elastically connected with the valve body and a valve seat matched with the valve element, the valve body is provided with a flow hole and communicated with one end of the valve element, and the distance between the valve element and the valve seat is correspondingly adjusted in a self-adaptive mode through changes of flow in the flow hole. And the flow in the flow hole is controlled within a preset range. According to the utility model, stable control on high-speed fluid can be realized, and the high-speed fluid can be further utilized, so that the high-speed fluid can generate power stably, and stable current can be output continuously.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, and in particular to duct flow control valves and power generation devices. Background Technology

[0002] When an aircraft flies at high speed, the relative motion between it and the gas creates a high-speed airflow, which can be controlled and utilized under these conditions.

[0003] For example, patent application number 200610085213.4 proposes a built-in ducted ramjet air turbine power generation device, which uses high-speed airflow to convert kinetic energy into electrical energy. However, its conversion method is fixed. While it can obtain electrical energy to a certain extent, the obtained electrical energy is actually unstable. For example, the generator output voltage is unstable, requiring an additional voltage control circuit to make the above solution more stable. The above technical solution does not consider parameters such as the speed range of the power generation turbine, generator, and rotor themselves. In actual environments, excessive flow will exceed the operating range of these components, thereby damaging the device, especially under the action of high-speed fluid, which can easily reach its limit. Utility Model Content

[0004] Purpose of the utility model: Based on the problems mentioned in the background art, a duct flow control valve and a power generation device are proposed.

[0005] Technical solution: A duct flow control valve, characterized in that it includes:

[0006] The duct, the valve body fixed inside the duct, the valve core elastically connected to the valve body, and the valve seat adapted to the valve core;

[0007] The valve body has a flow orifice, which is connected to one end of the valve core;

[0008] By adapting to changes in the flow rate within the flow orifice, the distance between the valve core and the valve seat is adjusted accordingly, thereby controlling the flow rate within the flow orifice within a preset range.

[0009] In a further embodiment, a direct mounting hole is provided inside the valve body; a slidable piston is mounted in the mounting hole; a groove is provided on the piston for mounting an elastic element; the other end of the elastic element is connected to the valve core; and a push rod is installed between the piston and the valve core.

[0010] In a further embodiment, the valve seat is fixed to the inner wall of the duct.

[0011] In a further embodiment, the piston is connected to a valve seat via a shaft, and the valve seat is slidable between itself and the inner wall of the duct.

[0012] In a further embodiment, the push rod is a servo-electric push rod.

[0013] In a further embodiment, a controller is also included, which is telecommunication connected to the servo electric actuator. The controller receives a preset signal and controls the movement of the servo electric actuator to precisely control the flow rate within the duct.

[0014] In a further embodiment, the outer surface of the valve seat has a spindle-shaped structure.

[0015] A power generation device, comprising any one of the above-mentioned duct flow control valves, further comprising:

[0016] A ram turbine is installed inside the duct.

[0017] A generator is connected to the ramjet turbine;

[0018] A circuit assembly is electrically connected to the generator; the circuit assembly is also electrically connected to the controller.

[0019] In a further embodiment, the elastic range selected for the elastic element is based on the parameters of the ram turbine.

[0020] In a further embodiment, the feedback parameters of the controller include at least the generator's output voltage and frequency.

[0021] Beneficial effects

[0022] 1. This utility model can achieve stable control of fluids within a region, stabilizing the fluid flow rate within a specified range, and is especially suitable for the control of high-speed fluids.

[0023] 2. This utility model utilizes the stable control of the fluid within the region to convert its energy and output a stable voltage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the duct flow control valve of this utility model.

[0025] Figure 2 This is a schematic diagram of the optimized power generation device structure proposed in the embodiment.

[0026] Figure 3 This is a schematic diagram of the second structure of the duct flow control valve of this utility model.

[0027] Figure 4 This is a schematic diagram of the power generation device of this utility model.

[0028] Figure 5 This is a schematic diagram of the second layout of the power generation device of this utility model.

[0029] Figures 1 to 5The components are labeled as follows: duct 1, valve body 2, valve seat 3, valve core 4, piston 5, groove 6, push rod 7, elastic element 8, controller 9, stamping turbine 10, generator 11, circuit assembly 12. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Example 1

[0032] Based on the background information, this application proposes a flow control valve suitable for adaptive flow control, particularly suitable for flow control of high-speed fluids. Figure 1 As shown, the main structure of the control valve in this application includes: a duct 1, a valve seat 3, a valve body 2, a valve core 4, and an elastic element 8, such as a spring, that enables elastic connection and relative movement between the valve body 2 and the valve core 4. The assembly method of the above structure includes: the valve body 2 is fixedly installed through the inner wall of the duct 1; the structure of the valve seat 3 is adapted to the valve core; the valve seat 3 adopts a venturi structure; the two are separated by a preset distance; and the valve body 2 is installed to the valve core 4 via a spring. A flow orifice is opened in the middle of the valve body 2.

[0033] In actual use, high-speed fluid enters through the flow orifice and pushes the valve core 4 to move. If the valve seat 3 is fixed in place and fixed in the duct 1, the movement of the valve core 4 changes its relative position with the valve seat 3, thereby realizing the control of the flow.

[0034] Furthermore, the specific structure of this embodiment is as follows: a direct mounting hole is opened inside the valve body 2, and a slidable piston 5 is mounted in the mounting hole. One end of the piston 5 is facing the flow hole, and a groove 6 is opened at the other end for installing a spring. The other end of the spring is connected to the valve core 4, and a push rod 7 is installed between the piston 5 and the valve core 4.

[0035] When fluid flows through valve body 2, it is stopped by piston 5, thus generating stagnation pressure (dynamic pressure). Dynamic pressure F = , in For the density of the fluid, Let A be the velocity of the airflow, and let A be the area of ​​the piston impacted by the airflow.

[0036] The stagnation pressure (dynamic pressure) pushes piston 5 to move, and the push rod 7 connected to piston 5 moves accordingly, thereby pushing valve core 4, which is connected to the other end of push rod 7, to move. Since valve seat 3 is stationary, the movement of valve core 4 changes its relative position to valve seat 3. The flow area of ​​the fluid decreases, hindering the flow of fluid and reducing the flow rate. During this process, the spring is compressed, generating a restoring force, until the stagnation pressure (dynamic pressure) of the fluid and the elastic force of the spring are balanced, and the fluid velocity (flow rate) stabilizes at the new value.

[0037] In actual use, two states will occur irregularly. When the flow rate (flow velocity) decreases, the restoring force of the spring will cause the valve core 4 to move away from the valve seat 3, the flow area will increase, and the flow rate will increase.

[0038] When the flow rate (velocity) increases, the fluid pushes the valve core 4 closer to the valve seat 3, at which point the flow area decreases and the flow rate decreases. That is, by changing the flow rate within the flow orifice, the distance between the valve core 4 and the valve seat 3 is adaptively adjusted, thereby limiting the flow rate within the flow orifice to a preset range.

[0039] Furthermore, the outer surface of the valve seat 3 has a spindle-shaped structure.

[0040] Further optimizations can be made to the above-mentioned solutions, such as... Figure 2 As shown, the push rod 7 used for connection is replaced with a servo electric push rod 7, and a controller 9 is set up for control.

[0041] Therefore, there are two control schemes. The first is a closed-loop control method, which weakens the role of the spring, or removes the spring, or uses it as a shock absorption structure. The distance between the valve core 4 and the valve seat 3 is directly controlled by the real-time signal or preset signal received by the controller 9.

[0042] The second option is a hybrid control method, which combines the spring force with the controller 9 to further fine-tune and precisely control the distance between the valve core 4 and the valve seat 3.

[0043] In the above scheme, the signal of controller 9 comes from the flow feedback signal. This feedback signal can be obtained through sensors and circuit structure, or through the electrical signal acquisition scheme as in embodiment 2, converting the fluid flow into an electrical signal for reception. This scheme is prior art, so it will not be described in detail here.

[0044] Unlike the above-mentioned solution, this application modifies the fixed valve seat 3 by connecting it to the piston 5 via a shaft structure, while the valve body 2 remains fixed within the duct 1. Figure 3 As shown, when the fluid moves piston 5, valve seat 3 also moves accordingly, which can also realize flow control.

[0045] Example 2

[0046] Based on the flow control mentioned in Example 1, a power generation device is further proposed. This power generation device converts the energy of the moving fluid into electrical energy. In addition, combined with the characteristics of the scheme in Example 1, the flow rate of the high-speed fluid can be controlled within a range, thereby achieving stable output of the power generation device.

[0047] like Figure 4 or Figure 5As shown, the structure of this embodiment also includes a ram turbine 10, a generator 11, and a circuit assembly 12. The ram turbine 10 and the generator 11 are connected, with the generator 11 connected to the circuit assembly 12, and the circuit assembly 12 electrically connected to the controller 9. Typically, the controller 9 can also be integrated into the circuit assembly 12. The circuit in this embodiment that converts current through the generator 11 and provides a stable output or storage is a conventional solution and not the core content of this application; therefore, it will not be described in detail in this embodiment.

[0048] In this embodiment, the elastic range of the spring is selected based on the parameters of the ramjet turbine 10. That is, an appropriate spring is selected according to the required flow rate, so that the flow rate remains constant when the external flow conditions change (e.g., changes in flight speed), thereby ensuring that the ramjet turbine 10 generates electricity stably.

[0049] Meanwhile, the feedback parameters of controller 9 include at least the voltage and frequency of generator 11. The parameters fed back by controller 9 then control the servo electric actuator 7 to make further outputs, allowing for further practical application of the two improved schemes in embodiment 1.

[0050] refer to Figure 4 , Figure 5 As shown, the length of the duct 1 is extended to install the ramjet turbine 10 and the generator 11. In actual use, based on specific requirements, either a straight duct 1 or a bent duct 1 can be selected. At the same time, guide vanes are installed inside the bend of the bent duct 1.

[0051] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A duct flow control valve, characterized in that, include: The duct, the valve body fixed inside the duct, the valve core elastically connected to the valve body, and the valve seat adapted to the valve core; The valve body has a flow orifice, which is connected to one end of the valve core; The distance between the valve core and the valve seat is adaptively adjusted according to the change in flow rate within the flow orifice, thereby controlling the flow rate within the flow orifice within a preset range. A direct mounting hole is provided inside the valve body. A slidable piston is mounted in the mounting hole. A groove is provided on the piston for mounting an elastic element. The other end of the elastic element is connected to the valve core. A push rod is installed between the piston and the valve core. The valve seat is fixed to the inner wall of the culvert; The piston is connected to the valve seat via a shaft, and the valve seat is slidable between itself and the inner wall of the duct.

2. The duct flow control valve according to claim 1, characterized in that, The push rod is a servo electric push rod.

3. The duct flow control valve according to claim 2, characterized in that, It also includes a controller that is connected to the servo electric actuator via telecommunications. The controller receives a preset signal and controls the movement of the servo electric actuator to precisely control the flow rate in the duct.

4. The duct flow control valve according to claim 1, characterized in that, The outer surface of the valve seat has a spindle-shaped structure.

5. A power generation device, characterized in that, The duct flow control valve according to any one of claims 1 to 4 further includes: A ram turbine is installed inside the duct. A generator is connected to the ramjet turbine; A circuit assembly is electrically connected to the generator; the circuit assembly is also electrically connected to the controller.

6. A power generation device according to claim 5, characterized in that, The elastic range selected for the elastic element is based on the parameters of the ram turbine.

7. A power generation device according to claim 6, characterized in that, The feedback parameters of the controller include at least the generator's output voltage and frequency.

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