Adaptive low-noise residual pressure power generation device

Abstract

The invention discloses an adaptive low-noise residual pressure power generation device, and relates to the field of hydraulic machinery. The adaptive low-noise residual pressure power generation device comprises a water inlet pipe, a bionic wing-shaped flow guide cover and a water outlet pipe which are sequentially connected, a sealing shell is connected into the water inlet pipe through a support, a generator is arranged in the sealing shell, and an output shaft of the generator penetrates out of the sealing shell and then is fixedly sleeved with an impeller arranged close to the water outlet pipe. A plurality of guide vanes are fixedly arranged on the outer wall of the sealing shell in a sleeving mode, each shock absorber comprises a shock absorber shell arranged on the water inlet pipe or the water outlet pipe in a sleeving mode and annular penetrating holes in one-to-one correspondence with the shock absorber shells, and an annular noise reduction cavity is defined by the shock absorber shells and the outer wall of the corresponding water inlet pipe or the water outlet pipe; the annular through holes are formed in the water inlet pipe or the water outlet pipe and communicate with the corresponding noise reduction cavities. According to the adaptive low-noise residual pressure power generation device, noise generated by fluid due to turbulence and cavitation effects can be reduced, and therefore the environmental adaptability is effectively improved.

Description

Technical Field

[0001] This application relates to the field of hydraulic machinery, and more specifically, to an adaptable low-noise residual pressure power generation device. Background Art

[0002] Residual pressure power generation refers to the technology of converting the redundant pressure energy of a fluid into electrical energy through a specially designed conversion device such as a turbine or a water turbine. It can reuse the energy that was originally ignored or wasted, thereby improving the overall energy usage efficiency.

[0003] Currently, traditional residual pressure power generation devices have defects in noise control, integrated design, and fluid mechanics optimization. When the device operates, due to the interaction between the water flow and the guide vanes and runner blades, turbulence and cavitation effects are generated. Coupled with the mechanical vibration caused by the high-speed rotation of the generator and the runner, the overall noise level is relatively high, thus affecting the environmental adaptability of the equipment.

[0004] Therefore, a low-noise residual pressure power generation device is needed to meet the requirements of the usage environment. Summary of the Invention

[0005] The purpose of this application is to provide an adaptable low-noise residual pressure power generation device, which can reduce the noise generated by the fluid due to turbulence and cavitation effects, thereby effectively improving the environmental adaptability.

[0006] This application is implemented as follows:

[0007] This application provides an adaptable low-noise residual pressure power generation device, which includes a water inlet pipe, a bionic airfoil-shaped flow deflector, and a water outlet pipe connected in sequence. A sealed housing is connected inside the water inlet pipe through a bracket. A generator is arranged inside the sealed housing. The output shaft of the generator penetrates through the sealed housing and is fixedly sleeved with an impeller arranged close to the water outlet pipe. A plurality of guide vanes are fixedly sleeved on the outer wall of the sealed housing. The device also includes at least one shock absorber. The shock absorber includes a shock absorber housing sleeved on the water inlet pipe or the water outlet pipe and an annular perforation corresponding to the shock absorber housing one by one. The shock absorber housing and the outer wall of the corresponding water inlet pipe or water outlet pipe enclose an annular noise reduction cavity. The annular perforation is arranged on the water inlet pipe or the water outlet pipe and communicates with the corresponding noise reduction cavity.

[0008] In some optional implementation schemes, the bionic airfoil-shaped flow deflector includes an inflow section, a speed stabilization section, and a negative pressure section connected in sequence. The inner diameter of the inflow section gradually decreases as it moves away from the water inlet pipe. The inner diameter of the speed stabilization section remains unchanged as it moves away from the water inlet pipe. The inner diameter of the negative pressure section gradually increases as it moves away from the water inlet pipe.

[0009] In some optional implementation schemes, the length of the annular perforation located downstream is greater than the length of the annular perforation located upstream.

[0010] In some alternative embodiments, the bracket includes a plurality of bracket plates circumferentially spaced along the sealed housing, both ends of the bracket plates are respectively connected to the outer wall of the sealed housing and the inner wall of the water inlet pipe, and at least one bracket plate is made of porous nickel-based foam metal.

[0011] In some alternative embodiments, the overall installation angle of the guide vane is 1.8 to 2.1°, the cascade pitch density of the guide vane is 0.89 to 1.02, and the diffusion angle of the guide vane is 9.6° to 10.2°.

[0012] In some alternative embodiments, at least a part of the guide vane is made of porous aluminum-based foam metal.

[0013] In some alternative embodiments, the impeller includes a hub sleeved on the output shaft of the generator and a plurality of blades circumferentially spaced and connected to the outer wall of the hub, and the blades are arranged between the inflow section and the speed stabilizing section.

[0014] In some alternative embodiments, the generator is connected with an indicator light through a wire sequentially passing through the sealed housing and the water inlet pipe.

[0015] In some alternative embodiments, the inner wall of the speed stabilizing section is connected with a flow rate regulating cylinder sleeved on the outside of the impeller, and the flow rate regulating cylinder is used for expanding or contracting when the pressure of the fluid flowing through it increases or decreases.

[0016] In some alternative embodiments, the flow rate regulating cylinder includes a plurality of regulating blades and a plurality of elastic regulating diaphragms, the plurality of regulating blades and the plurality of regulating diaphragms are alternately arranged along the circumference of the impeller, one end of the regulating blade close to the water inlet pipe is hinged to the inner wall of the speed stabilizing section, and both sides of each regulating diaphragm are respectively connected to two adjacent regulating blades.

[0017] The beneficial effects of the present application are as follows: The adapted low-noise residual pressure power generation device provided by the present application includes a water inlet pipe, a bionic airfoil flow deflector and a water outlet pipe connected in sequence. A sealed housing is connected in the water inlet pipe through a bracket. A generator is arranged in the sealed housing. The output shaft of the generator passes through the sealed housing and is fixedly sleeved with an impeller arranged close to the water outlet pipe. A plurality of guide vanes are fixedly sleeved on the outer wall of the sealed housing. The device also includes at least one shock absorber. The shock absorber includes a shock absorber housing sleeved on the water inlet pipe or the water outlet pipe and an annular perforation corresponding to the shock absorber housing one by one. The shock absorber housing and the outer wall of the corresponding water inlet pipe or water outlet pipe enclose an annular noise reduction cavity, and the annular perforation is arranged on the water inlet pipe or the water outlet pipe and communicates with the corresponding noise reduction cavity. The adapted low-noise residual pressure power generation device provided by the present application can make the flowing fluid enter the noise reduction cavity through the annular perforation by connecting the shock absorber housing to enclose an annular noise reduction cavity on at least one outer wall of the water inlet pipe and the water outlet pipe, and setting an annular perforation communicating with the corresponding noise reduction cavity on at least one outer wall of the water inlet pipe and the water outlet pipe, so as to reduce the noise generated by at least one of the impeller and the guide vane due to turbulence and cavitation effects, and improve the environmental adaptability of the adapted low-noise residual pressure power generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 FIG. 8 is a schematic cross-sectional view of the longitudinal section of the adaptable low-noise residual pressure power generation device provided in Embodiment 1 of the present application;

[0020] Figure 2 FIG. 12 is a schematic partial cross-sectional view of the adaptable low-noise residual pressure power generation device provided in Embodiment 1 of the present application, omitting the generator, shock absorber, and indicator light;

[0021] Figure 3 FIG. 16 is a schematic cross-sectional view of the cross-section of the adaptable low-noise residual pressure power generation device provided in Embodiment 1 of the present application;

[0022] Figure 4 FIG. 20 is a schematic partial cross-sectional view of the connection of the water inlet pipe, bionic airfoil-shaped flow guide cover, water outlet pipe, and shock absorber in the adaptable low-noise residual pressure power generation device provided in Embodiment 1 of the present application;

[0023] Figure 5 FIG. 24 is a schematic structural view of the first perspective of the impeller in the adaptable low-noise residual pressure power generation device provided in Embodiment 1 of the present application;

[0024] Figure 6 FIG. 28 is a schematic structural view of the first perspective of the impeller in the adaptable low-noise residual pressure power generation device provided in Embodiment 1 of the present application;

[0025] Figure 7 FIG. 32 is a schematic partial longitudinal cross-sectional view of the connection of the flow rate adjustment cylinder to the inner wall of the bionic airfoil-shaped flow guide cover in the adaptable low-noise residual pressure power generation device provided in Embodiment 2 of the present application;

[0026] Figure 8 FIG. 36 is a schematic partial cross-sectional view of the connection of the flow rate adjustment cylinder to the inner wall of the bionic airfoil-shaped flow guide cover in the adaptable low-noise residual pressure power generation device provided in Embodiment 2 of the present application.

[0027] In the figure: 100, water inlet pipe; 110, water outlet pipe; 120, sealed housing; 130, generator; 140, impeller; 141, hub; 142, blade; 150, guide vane; 151, trailing edge; 160, bionic airfoil fairing; 161, inflow section; 162, speed-stabilizing section; 163, negative pressure section; 170, indicator light; 180, wire; 200, bracket; 210, bracket plate; 300, shock absorber; 310, shock absorber housing; 320, annular perforation; 330, noise reduction cavity; 400, flow rate adjusting cylinder; 410, fluid cavity; 420, adjusting blade; 430, adjusting diaphragm. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] The features and performance of the adaptable low-noise residual pressure power generation device of the present application will be further described in detail below in conjunction with the embodiments.

[0036] Embodiment 1

[0037] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, the embodiment of the present application provides an adaptable low-noise residual pressure power generation device, which includes a water inlet pipe 100, a bionic airfoil fairing 160, and a water outlet pipe 110 connected in sequence, and two shock absorbers 300. The inner diameter of the water outlet pipe 110 is larger than that of the water inlet pipe 100. A sealed housing 120 is connected inside the water inlet pipe 100 through a bracket 200. A generator 130 is arranged inside the sealed housing 120. The output shaft of the generator 130 penetrates through the end of the sealed housing 120 close to the water outlet pipe 110 and is fixedly sleeved with an impeller 140. Six guide vanes 150 are fixedly sleeved on the outer wall of the sealed housing 120 at intervals along its circumference. The generator 130 is connected to an indicator light 170 through a wire 180 that penetrates through the sealed housing 120 and the water inlet pipe 100 in sequence;

[0038] Among them, the bionic airfoil fairing 160 includes an inflow section 161, a speed-stabilizing section 162, and a negative-pressure section 163 connected in sequence. The inner diameter of the inflow section 161 gradually decreases as it moves away from the water inlet pipe 100, the inner diameter of the speed-stabilizing section 162 remains unchanged as it moves away from the water inlet pipe 100, and the inner diameter of the negative-pressure section 163 gradually increases as it moves away from the water inlet pipe 100; the bracket 200 includes six bracket plates 210 arranged at intervals along the circumferential direction of the sealing housing 120. The two ends of the bracket plate 210 are respectively connected to the outer wall of the sealing housing 120 and the inner wall of the water inlet pipe 100. All six bracket plates 210 are made of porous nickel-based foam metal NiCrAl. In this embodiment, the pore density PPI of the porous nickel-based foam metal is 30;

[0039] A shock absorber 300 is respectively connected to the water inlet pipe 100 and the water outlet pipe 110, and the resonance frequencies of the shock absorbers 300 on the water inlet pipe 100 and the water outlet pipe 110 are the same; the shock absorber 300 includes a shock absorber housing 310 sleeved on the water inlet pipe 100 or the water outlet pipe 110 and an annular perforation 320 corresponding to the shock absorber housing 310. The shock absorber housing 310 and the outer wall of the corresponding water inlet pipe 100 or the water outlet pipe 110 enclose an annular noise reduction cavity 330. The annular perforation 320 is arranged on the water inlet pipe 100 or the water outlet pipe 110 and communicates with the corresponding noise reduction cavity 330. The length of the annular perforation 320 on the downstream water outlet pipe 110 is greater than the length of the annular perforation 320 on the upstream water inlet pipe 100; the shock absorber housing 310 sleeved on the water inlet pipe 100 is located outside the guide vane 150, and the annular perforation 320 opened on the outer wall of the water inlet pipe 100 is located upstream of the guide vane 150.

[0040] The overall installation angle of the guide vane 150 is 2°, the cascade pitch density of the guide vane 150 is 1, the diffusion angle of the guide vane 150 is 10°, and the trailing edge 151 part of 20% of the length of the end of the guide vane 150 close to the water outlet pipe 110 is made of porous aluminum-based foam metal AlSi7Mg. In this embodiment, the PPI of the porous aluminum-based foam metal is 30. The impeller 140 includes a hub 141 sleeved on the output shaft of the generator 130 and six blades 142 connected to the outer wall of the hub 141 at intervals along the circumferential direction. The blades 142 are arranged between the inflow section 161 and the speed-stabilizing section 162.

[0041] When the adaptive low-noise residual pressure power generation device provided by the embodiment of the present application is in use, the water inlet pipe 100 is connected to a water source, and the water outlet pipe 110 is connected to a drain pipe. When the water flow provided by the water source enters the water inlet pipe 100, it flows through the inflow section 161, the speed stabilizing section 162, and the negative pressure section 163 of the bionic airfoil fairing 160, and then flows into the drain pipe through the water outlet pipe 110 and is discharged. At the same time, the water flow drives the impeller 140 fixedly sleeved on the output shaft of the generator 130 to rotate, so that the generator 130 generates electricity, and the indicator light 170 connected through the wire 180 indicates that electricity is being generated; the adaptive low-noise residual pressure power generation device respectively sleeved with shock absorber shells 310 on the water inlet pipe 100 and the water outlet pipe 110 to enclose a noise reduction cavity 330, and annular perforations 320 communicating with the noise reduction cavity 330 are respectively opened on the outer walls of the water inlet pipe 100 and the water outlet pipe 110, so that the turbulence generated by the water flow in the water inlet pipe 100 flowing through the guide vanes 150 can enter the noise reduction cavity 330 through the annular perforations 320 for buffering and noise reduction, thereby reducing the noise generated by the turbulence and cavitation effect, and enabling the two shock absorbers 300 connected to the outer walls of the water inlet pipe 100 and the water outlet pipe 110 to cooperate with each other through the same resonance frequency to form a coupled resonance to achieve the best noise reduction synergistic effect.

[0042] As Figure 3 shown, six guide vanes 150 are distributed symmetrically about the center along the sealing housing 120. The overall setting angle of the guide vanes 150 is 2°, which can make the inlet angle of the guide vane 150 blades basically parallel to the water inflow angle, making the inflow condition relatively optimal and ensuring smooth water outflow; the cascade pitch density of the guide vanes 150 is 1, the diffusion angle of the guide vanes 150 is 10°, and the trailing edge 151 part of 20% of the length of the guide vanes 150 near the water outlet pipe 110 is made of porous aluminum-based foam metal AlSi7Mg, which can make the acoustic impedance characteristics of the trailing edge 151 made of porous aluminum-based foam metal match the fluid medium to absorb medium and high-frequency noise energy, inhibit the propagation of broadband noise, at the same time use the viscous dissipation in the pores to absorb sound energy, and destroy the periodic shedding of eddies, disrupt the eddy structure, reduce the pressure pulsation amplitude by 40%, and reduce noise while reducing energy loss.

[0043] As Figure 4 shown, the bracket 200 includes six bracket plates 210 arranged at intervals along the circumferential direction of the sealing housing 120. The two ends of the bracket plates 210 are respectively connected to the outer wall of the sealing housing 120 and the inner wall of the water inlet pipe 100. The six bracket plates 210 are all made of porous nickel-based foam metal NiCrAl, which can destroy the fluid separation vortex through the porous structure of the bracket plates 210 made of porous nickel-based foam metal, reduce the flow resistance and absorb broadband noise energy.

[0044] The adaptive low-noise residual pressure power generation device provided by the embodiment of the present application can reduce the operating noise from 80 dB(A) to below 65 dB(A), reduce the broadband noise sound pressure level by 20%, improve the flow velocity distribution uniformity by 35%, reduce the turbulence intensity by 12%-15%, reduce the flow resistance to below 0.18 MPa, reduce the pressure pulsation amplitude by 30%, increase the energy recovery efficiency by 15%-25%, increase the annual power generation to 192,276 kWh, effectively improve the energy recovery rate and reduce environmental and noise pollution.

[0045] In other alternative embodiments, the overall installation angle of the guide vane can also be any angle between 1.8° and 2.1°.

[0046] In other alternative embodiments, the cascade density of the guide vane can also be any value between 0.89 and 1.02.

[0047] In other alternative embodiments, the diffusion angle of the guide vane can also be any angle between 9.6° and 10.2°.

[0048] Embodiment 2

[0049] As Figure 7 and Figure 8 shown, the embodiment of the present application provides an adaptive low-noise residual pressure power generation device, which has a structure substantially the same as that of the adaptive low-noise residual pressure power generation device provided in Embodiment 1. The difference is that in this embodiment, a flow velocity adjusting cylinder 400 sleeved outside the impeller 140 is connected to the inner wall of the constant speed section 162. A fluid cavity 410 covering the impeller 140 is formed inside the flow velocity adjusting cylinder 400. The flow velocity adjusting cylinder 400 is used to expand or contract when the fluid pressure flowing through the fluid cavity 410 increases or decreases; the flow velocity adjusting cylinder 400 includes four adjusting vanes 420 and four elastic adjusting diaphragms 430. The four adjusting vanes 420 and the four adjusting diaphragms 430 are alternately arranged along the circumferential direction of the impeller 140. One end of the adjusting vane 420 close to the water inlet pipe 100 is hinged to the inner wall of the constant speed section 162, and both sides of each adjusting diaphragm 430 are respectively connected to two adjacent adjusting vanes 420.

[0050] In the adaptive low-noise residual pressure power generation device provided by the embodiment of the present application, a flow velocity regulating cylinder 400 sleeved outside the impeller 140 is connected to the inner wall of the constant-speed section 162. The flow velocity regulating cylinder 400 is used to expand or contract when the fluid pressure flowing through its internal fluid cavity 410 increases or decreases. Thus, the size of the fluid cavity 410 is adjusted by the flow velocity regulating cylinder 400 to adapt to the change of water pressure. When the water pressure is relatively large, it pushes each regulating blade 420 to rotate away from each other and stretches each regulating diaphragm 430 to expand the flow velocity regulating cylinder 400 to avoid affecting the fluid flow velocity, ensuring that the water flow drives the impeller 140 to rotate stably for power generation. When the water pressure is relatively small, each regulating diaphragm 430 pulls each regulating blade 420 to rotate towards each other to contract the flow velocity regulating cylinder 400 and reduce the volume of the fluid cavity 410, thereby increasing the water pressure of the fluid passing through the fluid cavity 410, promoting the water flow to drive the impeller 140 to rotate for power generation, and ensuring the stable progress of the power generation process in different water pressure environments.

[0051] The embodiments described above are some, but not all, of the embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

Claims

1. An adaptive low-noise residual pressure power generation device, which comprises a water inlet pipe, a bionic airfoil flow guide cover and a water outlet pipe connected in sequence. A sealed housing is connected in the water inlet pipe through a bracket. A generator is arranged in the sealed housing. The output shaft of the generator penetrates out of the sealed housing and is fixedly sleeved with an impeller arranged close to the water outlet pipe. A plurality of guide vanes are fixedly sleeved on the outer wall of the sealed housing, and it is characterized in that, It further includes at least one shock absorber, which includes a shock absorber housing sleeved on the water inlet pipe or the water outlet pipe and an annular perforation corresponding to the shock absorber housing one by one. The shock absorber housing and the outer wall of the corresponding water inlet pipe or water outlet pipe enclose an annular noise reduction cavity, and the annular perforation is arranged on the water inlet pipe or the water outlet pipe and communicates with the corresponding noise reduction cavity.

2. The adaptable low-noise residual pressure power generation device according to claim 1, wherein The bionic airfoil fairing includes an inflow section, a speed stabilizing section and a negative pressure section connected in sequence. The inner diameter of the inflow section gradually decreases as it moves away from the water inlet pipe, the inner diameter of the inflow section remains unchanged as it moves away from the water inlet pipe, and the inner diameter of the negative pressure section gradually increases as it moves away from the water inlet pipe.

3. The adaptable low-noise residual pressure power generation device according to claim 2, wherein The length of the annular perforation located downstream is greater than the length of the annular perforation located upstream.

4. The adaptable low-noise residual pressure power generation device according to claim 2, wherein The bracket includes a plurality of bracket plates arranged at intervals along the circumferential direction of the sealing housing. The two ends of the bracket plate are respectively connected to the outer wall of the sealing housing and the inner wall of the water inlet pipe, and at least one of the bracket plates is made of porous nickel-based foam metal.

5. The adaptable low-noise residual pressure power generation device according to claim 1, characterized in that, The overall installation angle of the guide vane is 1.8 - 2.1°, the blade pitch density of the guide vane is 0.89 - 1.02, and the diffusion angle of the guide vane is 9.6° - 10.2°.

6. The adaptable low-noise residual pressure power generation device according to claim 1, characterized in that, At least a part of the guide vane is made of porous aluminum-based foam metal.

7. The adaptable low-noise residual pressure power generation device according to claim 2, wherein The impeller includes a hub sleeved on the output shaft of the generator and a plurality of blades connected to the outer wall of the hub at intervals along the circumferential direction. The blades are arranged between the inflow section and the speed stabilizing section.

8. The adaptable low-noise residual pressure power generation device according to claim 1, wherein The generator is connected with an indicator light through a wire that sequentially penetrates through the sealing housing and the water inlet pipe.

9. The adaptable low-noise residual pressure power generation device according to claim 2, characterized in that The inner wall of the speed stabilizing section is connected with a flow rate adjusting cylinder sleeved outside the impeller. The flow rate adjusting cylinder is used to expand or contract when the fluid pressure flowing through it increases or decreases.

10. The adaptable low-noise residual pressure power generation device according to claim 9, wherein The flow rate adjusting cylinder includes a plurality of adjusting blades and a plurality of elastic adjusting diaphragms. The plurality of adjusting blades and the plurality of adjusting diaphragms are alternately arranged along the circumferential direction of the impeller. One end of the adjusting blade close to the water inlet pipe is hinged to the inner wall of the speed stabilizing section, and both sides of each adjusting diaphragm are respectively connected to two adjacent adjusting blades.

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