A hydraulic power generation system

Abstract

The present invention provides a hydraulic power generation system, including a hull, an impeller system B, a hydraulic transducer system C, and a power generation system D. The impeller system B is arranged below the hull, and the impeller device B can rotate under the action of the movement of the hull. The hydraulic transducer system C and the power generation system D are arranged on the hull. The hydraulic transducer system C will be able to convert kinetic energy into mechanical energy into hydraulic energy under the rotation of the impeller device B, and the generator rotates at a constant speed under the action of the control system. This design is based on installing an impeller on the bottom of the ship, directly connecting the impeller with a quantitative hydraulic pump, rotating synchronously, and placing all the control components and execution components of the system on the cabin. On the one hand, water flow is generated when the hull is running, and the impact force of the water flow causes the impeller to rotate, thereby causing the generator to rotate at a constant speed under the action of the control system, thereby realizing constant frequency and stable power generation. On the other hand, it makes installation and maintenance convenient, system debugging and testing simple, and reduces costs.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation equipment, and in particular to a hydraulic power generation system. Background Art

[0002] With the over-exploitation and depletion of fossil fuel energy, the resulting global energy crisis and environmental pollution have become the focus of close attention of countries around the world. Therefore, the scientific development and comprehensive utilization of renewable energy represented by water flow energy, solar energy and wind energy has important theoretical and practical significance for mankind to alleviate the energy crisis and environmental pollution.

[0003] Hydropower generation is an important part of clean and renewable energy. The development and construction of hydropower generation has a multi-level energy construction function, which is a comprehensive utilization of water resources. At the same time, it can better promote the comprehensive management of rivers, seas and rivers, and is conducive to the further development of clean and renewable energy.

[0004] my country is a country with relatively abundant water resources. Water flow energy is the kinetic energy of the flow of rivers and sea water. Ocean current energy mainly refers to the energy generated by the relatively stable flow of seawater in submarine waterways and straits and the regular flow of seawater caused by tides. It is another type of ocean energy in the form of kinetic energy.

[0005] The existing hydroelectric power generation device adopts a power generation form in which the entire system is installed underwater, which is very inconvenient to install and maintain. At the same time, the underwater installation of the system also brings difficulties to the system test. All these have virtually led to an increase in the cost of the power generation device. Summary of the invention

[0006] The present invention designs a hydraulic power generation system. The design is based on installing an impeller on the bottom of the ship, directly connecting the impeller with a quantitative hydraulic pump, rotating synchronously, and placing all control components and execution components of the system on the cabin.

[0007] In view of the problems existing in the existing water flow power generation technology, it is crucial to use the water flow power generation technology with constant speed control of hydraulic motors to improve the utilization rate of water energy under unstable water speed while ensuring the constant speed of the generator to achieve stable frequency power generation.

[0008] When the water speed and the impeller speed change, the displacement of the variable motor can be adjusted to keep the motor moving at a constant speed, achieving constant frequency power generation, that is, through the principle of secondary energy conversion, thus achieving constant frequency power generation. This "flexible" energy conversion has a buffer and transition in the energy conversion process, which has distinct advantages and characteristics.

[0009] To solve the above problems, the present invention discloses a hydraulic power generation system, including a hull, an impeller system B, a hydraulic energy conversion system C, and a power generation system D. The impeller system B is arranged below the hull, and the impeller device B can rotate under the movement of the hull. The hydraulic energy conversion system C and the power generation system D are arranged on the hull. The hydraulic energy conversion system C can convert kinetic energy-mechanical energy-hydraulic energy under the rotation of the impeller device B. The generator of the power generation system D is transmission-connected with the hydraulic energy conversion system C, and the generator rotates at a constant speed under the action of the control system. The power generation system D provides electricity and / or energy storage for the hull.

[0010] Furthermore, the impeller device B can be rotated by the impact force of the water flow when the hull moves.

[0011] The design of the present invention is based on installing an impeller on the bottom of the ship, directly connecting the impeller with a quantitative hydraulic pump, rotating synchronously, and placing all the control components and execution components of the system on the cabin. On the one hand, water flow is generated when the hull is running, and the impact force of the water flow causes the impeller to rotate. The rotating impeller realizes the conversion of water flow energy-mechanical energy-hydraulic energy under the action of the hydraulic energy conversion system, and then the generator rotates at a constant speed under the action of the control system, thereby realizing constant frequency and stable power generation. On the other hand, it is convenient for installation and maintenance, simple for system debugging and testing, and reduces costs.

[0012] Furthermore, the hydraulic energy conversion system C includes a fixed-displacement pump, a hydraulic control device and a variable motor. The fixed-displacement pump and the impeller constitute a fixed-displacement pump-impeller system. The impeller can drive the fixed-displacement pump to rotate, thereby driving the hydraulic block in the hydraulic control device to slide. The variable motor and the generator constitute a variable motor-generator system. Under the action of the control system, the variable motor can maintain constant speed movement by adjusting the displacement of the variable motor and / or the displacement of the control valve group, and the variable motor then drives the generator to rotate at a constant speed.

[0013] This setting uses a hydraulic energy conversion system so that when the impeller moves on the hull, the impeller drives the low-speed, high-flow pump to rotate under the action of the impact force of the water flow, thereby realizing the conversion of water flow energy-mechanical energy-hydraulic energy. The pump output flow drives the variable motor through the valve group integration. The motor can maintain constant speed movement by adjusting the displacement of the variable motor and the control valve group. When the water flow speed and the impeller speed change, the motor can maintain constant speed movement by adjusting the displacement of the variable motor and the control valve group, thereby realizing constant frequency and stable power generation.

[0014] Furthermore, the metering pump is a low-speed, high-flow pump.

[0015] The arrangement discloses an arrangement structure of a metering pump to ensure the stability of the operation of the entire system.

[0016] Furthermore, an accumulator is connected to the outlet of the low-speed and high-flow pump.

[0017] This setting avoids the flow and pressure fluctuations caused by the characteristics of the large flow pump itself in the hydraulic system, and reduces the impact of flow and pressure fluctuations on system stability.

[0018] Furthermore, the impeller system B includes at least one impeller, and the impeller is integrated with the metering pump.

[0019] This arrangement minimizes installation space, has strong serialization and scalability, is suitable for modular flexible combination layouts with different needs, and improves the applicability of the present invention.

[0020] Furthermore, the hydraulic control device comprises a low-pressure valve block and a high-pressure valve block, the low-pressure valve block and the high-pressure valve block form a valve group integration, and the valve group integration is used to integrate the main hydraulic valves used in the system onto the valve block.

[0021] This setting minimizes external connections. Since most of the hydraulic valves are installed on the valve block, the connection between the hydraulic valves is connected through the oil circuit in the valve block, which greatly reduces the external pipeline connection. The natural water flow and the integrated combination of the hydraulic valve group are used to achieve stable frequency power generation.

[0022] Furthermore, a compensation device is provided between the variable motor and the generator, and the compensation device is used to connect the variable motor and the generator so that they can rotate synchronously.

[0023] The arrangement discloses a method of connecting a variable motor to a generator, so that the variable motor and the generator can rotate synchronously.

[0024] Furthermore, the control system also includes a monitoring system A, which is used to monitor the movement status of the impeller system B, the hydraulic transducer system C, and the power generation system D.

[0025] Furthermore, the impeller device B can rotate under the action of wind impact force or water flow impact force.

[0026] This arrangement further improves the applicability of the present invention, making the present invention have a wide range of applications, and can be used for both natural water flow and wind power generation.

[0027] Compared with the prior art, the hydraulic power generation system of the present invention has the following beneficial effects:

[0028] 1. The impeller is installed under the hull, and other actuators are placed on the hull, which is convenient for installation and maintenance, simple system debugging and testing, and reduces costs;

[0029] 2. When the water flow velocity and the impeller speed change, the motor can maintain constant speed by adjusting the displacement of the variable motor and the control valve group, thereby achieving constant frequency and stable power generation;

[0030] 3. The impeller is integrated with the low-speed and high-flow pump, and the main hydraulic valves are integrated with the valve group on the valve block, so that the hydraulic power generation system of the present invention operates safely and reliably and is suitable for large-scale promotion and application;

[0031] 4. The use of clean energy in work projects has sustainable development significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a device module of the hydraulic power generation system of the present invention;

[0033] Figure 2 This is a principle flow chart of the hydraulic power generation system of the present invention;

[0034] Description of reference numerals:

[0035] 1-Multi-function power meter, 2-Controller, 3-Impeller, 4-Low-pressure valve block, 5-High-pressure valve block, 6-Hydraulic control device, 7-Generator, 8-Pressure stabilizing system. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Embodiment 1, as Figures 1-2 As shown, the present invention discloses a hydraulic power generation system, including a hull, an impeller system B, a hydraulic energy conversion system C, and a power generation system D. The impeller system B is arranged below the hull, and the impeller device B can rotate under the movement of the hull. The hydraulic energy conversion system C and the power generation system D are arranged on the hull. The hydraulic energy conversion system C can convert kinetic energy-mechanical energy-hydraulic energy under the rotation of the impeller device B. The generator of the power generation system D is transmission-connected with the hydraulic energy conversion system C, and the generator rotates at a constant speed under the action of the control system. The power generation system D provides electricity and / or energy storage for the hull.

[0038] Preferably, the impeller device B can be rotated by the impact force of the water flow when the hull moves.

[0039] The design of the present invention is based on installing an impeller on the bottom of the ship, directly connecting the impeller with a quantitative hydraulic pump, rotating synchronously, and placing all the control components and execution components of the system on the cabin. On the one hand, water flow is generated when the hull is running, and the impact force of the water flow causes the impeller to rotate. The rotating impeller realizes the conversion of water flow energy-mechanical energy-hydraulic energy under the action of the hydraulic energy conversion system, and then the generator rotates at a constant speed under the action of the control system, thereby realizing constant frequency and stable power generation. On the other hand, it is convenient for installation and maintenance, simple for system debugging and testing, and reduces costs.

[0040] As a preferred embodiment of the present invention, the hydraulic energy conversion system C includes a fixed-displacement pump, a hydraulic control device and a variable motor. The fixed-displacement pump and the impeller constitute a fixed-displacement pump-impeller system. The impeller can drive the fixed-displacement pump to rotate, thereby driving the hydraulic block in the hydraulic control device to slide. The variable motor and the generator constitute a variable motor-generator system. Under the action of the control system, the variable motor can maintain constant speed movement by adjusting the displacement of the variable motor and / or the displacement of the control valve group. The variable motor then drives the generator to rotate at a constant speed.

[0041] This setting uses a hydraulic energy conversion system so that when the impeller moves on the hull, the impeller drives the low-speed, high-flow pump to rotate under the action of the impact force of the water flow, thereby realizing the conversion of water flow energy-mechanical energy-hydraulic energy. The pump output flow drives the variable motor through the valve group integration. The motor can maintain constant speed movement by adjusting the displacement of the variable motor and the control valve group. When the water flow speed and the impeller speed change, the motor can maintain constant speed movement by adjusting the displacement of the variable motor and the control valve group, thereby realizing constant frequency and stable power generation.

[0042] As an example of the present invention, the metering pump is a low-speed high-flow pump. This configuration discloses a configuration structure of a metering pump to ensure the stability of the operation of the entire system. The low-speed high-flow pump is a low-speed high-flow hydraulic pump available on the market.

[0043] As an example of the present invention, an accumulator is connected at the outlet of a low-speed, high-flow pump. Due to the characteristics of the high-flow pump itself, the fluctuations in the flow and pressure of the hydraulic system will affect the stability of the entire system. By connecting the accumulator at the outlet of the low-speed, high-flow pump, when the flow required by the load is less than the flow of the metering pump during low-speed movement, the excess flow of the metering pump is stored in the accumulator. When the load requires a flow greater than the flow of the metering pump, the liquid is released from the accumulator to make up for the insufficient flow of the metering pump. When the system is shut down but a certain pressure still needs to be maintained, the metering pump can be stopped and the accumulator can compensate for the leakage of the system to maintain the pressure of the system. The accumulator can also be used to absorb the pressure pulsation of the metering pump or the hydraulic shock pressure generated in the system. The accumulator can be any of spring, gas or piston types. This setting can reduce the impact of flow and pressure fluctuations on system stability to a certain extent.

[0044] As a preferred embodiment of the present invention, the impeller system B comprises at least one impeller 1, and the impeller 1 is integrated with the metering pump. This configuration minimizes the installation space, has strong serialization and scalability, and is suitable for modular flexible combination layout with different requirements, thereby improving the applicability of the present invention.

[0045] As an example of the present invention, the impeller system B is provided with two impellers. When the hull moves, the two impellers can rotate simultaneously under the impact force of the water flow. The circulation driven by the rotation of the impellers is converted into mechanical energy through the action of a low-speed high-flow pump. The flow output by the pump is integrated through a valve group to drive a variable motor. Hydraulic oil, pure water or seawater can be used as a transmission medium. The motor can maintain a constant speed by adjusting the displacement of the variable motor and the control valve group. The variable motor then drives the generator to rotate at a constant speed.

[0046] As a preferred embodiment of the present invention, the hydraulic control device comprises a low-pressure valve block 4 and a high-pressure valve block 5, wherein the low-pressure valve block 4 and the high-pressure valve block 5 form a valve group integration, and the valve group integration is used to integrate the main hydraulic valves used in the system onto the valve block. This setting minimizes external connections, and since most of the hydraulic valves are centrally installed on the valve block, the connection between the hydraulic valves is connected through the oil circuit in the valve block, thereby greatly reducing external pipeline connections, utilizing natural water flow and the integration of the hydraulic valve group to achieve stable frequency power generation.

[0047] As a preferred embodiment of the present invention, a compensation device is provided at the connection between the variable motor and the generator, and the compensation device is used to connect the variable motor and the generator so that they can rotate synchronously. As an example of the present invention, the compensation device is an elastic coupling, and the variable motor and the generator are connected through an elastic coupling, and the elastic coupling is a coupling that can be purchased on the market. This setting discloses a connection method between the variable motor and the generator, so that the variable motor and the generator can rotate synchronously.

[0048] The control principle and power generation method of the hydraulic power generation system of the present invention are as follows: Figure 2 As shown:

[0049] 1. When the hull is running, water flow is generated, and the impact force of the water flow causes the impeller to rotate;

[0050] 2. The impeller drives the low-speed, high-flow pump to rotate, realizing the conversion of water flow energy, mechanical energy and hydraulic energy;

[0051] 3. The pump output flow drives the variable motor through the valve group integration;

[0052] 4. The motor can maintain constant speed by adjusting the displacement of the variable motor and the control valve group;

[0053] 5. Realize constant frequency and stable power generation to supply power and store energy for the ship.

[0054] The present invention utilizes the impact force of the water flow at the bottom of the ship to impact the impeller, causing the impeller to rotate. The impeller is connected to a hydraulic pump, and the pump and the hydraulic element control a variable motor. When the water speed and the rotation speed of the impeller change, the displacement of the variable motor can be adjusted to keep the motor moving at a constant speed, thereby achieving constant frequency power generation.

[0055] The research on natural water flow energy generation equipment based on hydraulic transduction belongs to the scientific and technological frontier of new energy equipment development and research, and has important application value and huge development potential.

[0056] Due to the disordered changes in water flow velocity, the capture and conversion of water energy is uncontrollable, and the utilization rate of water energy is not easy to improve. The existing water flow power generation device enables the impeller of the turbine to obtain the most water energy when the water velocity is good and stable. It cannot generate electricity stably and continuously under other conditions such as unstable water velocity and disordered direction.

[0057] (1) The impeller is installed under the hull, and other actuators are placed on the hull.

[0058] (2) Due to the characteristics of the large flow pump itself, the fluctuation of the flow and pressure of the hydraulic system will affect the stability of the entire system. When designing the hydraulic system, the present invention connects an accumulator to the outlet of the low-speed large flow pump, which can reduce the impact of flow and pressure fluctuations on system stability to a certain extent.

[0059] (3) The new hydraulic power generation system of the natural water flow at the bottom of the ship realizes stable frequency power generation. The system mainly consists of an impeller, a low-speed large-flow pump, a hydraulic control device, a variable motor, a generator set and a control system.

[0060] The control system of the present invention satisfies the structural and functional requirements of the natural water flow hydraulic power generation device. The entire control system consists of two major parts: a hydraulic variable motor constant speed control system and a remote monitoring system.

[0061] As an example of the present invention, the control system further includes a monitoring system A, and the monitoring system A is used to monitor the motion states of the impeller system B, the hydraulic transducer system C, and the power generation system D.

[0062] As a preferred embodiment of the present invention, the monitoring system includes a multifunctional power meter 1 and a controller 2. The multifunctional power meter 1 is used to detect the operating status of the devices in the impeller system B, the hydraulic transducer system C, and the power generation system D and feed it back to the controller 2. The controller 2 is used to adjust and control the operating status of the devices in the hydraulic transducer system C and the power generation system D. As an example of the present invention, the controller 2 is a PLC controller.

[0063] As a preferred embodiment of the present invention, the impeller device B can rotate under the impact of wind or water flow. This arrangement further improves the applicability of the present invention, making the present invention widely applicable, and can be used for both natural water flow and wind power generation.

[0064] As a preferred embodiment of the present invention, the power generation system D includes a voltage stabilizing system 8, and the voltage stabilizing system 8 is used to ensure the stable output of the generator 7 for power consumption and energy storage for the hull.

[0065] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A hydraulic power generation system, characterized in that: It includes a hull, an impeller system B, a hydraulic transducer system C, and a power generation system D. The impeller system B is arranged below the hull, and the impeller system B can rotate under the movement of the hull. The hydraulic transducer system C and the power generation system D are arranged on the hull. The hydraulic transducer system C can convert kinetic energy-mechanical energy-hydraulic energy under the rotation of the impeller system B. The generator of the power generation system D is connected with the hydraulic transducer system C in a transmission manner. The generator rotates at a constant speed under the action of the control system. The power generation system D provides electricity and / or energy storage for the hull. The impeller system B can rotate due to the impact force of the water flow when the hull moves; The hydraulic transducer system C comprises a fixed-displacement pump, a hydraulic control device and a variable motor. The fixed-displacement pump and the impeller form a fixed-displacement pump-impeller system. The impeller can drive the fixed-displacement pump to rotate, thereby driving the hydraulic block in the hydraulic control device to slide. The variable motor and the generator form a variable motor-generator system. Under the action of the control system, the variable motor can maintain constant speed movement by adjusting the displacement of the variable motor and / or the displacement of the control valve group, and the variable motor then drives the generator to rotate at a constant speed. The hydraulic control device comprises a low-pressure valve block (4) and a high-pressure valve block (5), wherein the low-pressure valve block (4) and the high-pressure valve block (5) form a valve group integration, and the valve group integration is used to integrate the hydraulic valves used in the system onto the valve block; A compensation device is provided between the variable motor and the generator, and the compensation device is used to connect the variable motor and the generator so that they can rotate synchronously; The control system also includes a monitoring system A, which is used to monitor the movement status of the impeller system B, the hydraulic transducer system C, and the power generation system D.

2. The hydraulic power generation system according to claim 1, characterized in that: The metering pump is a low-speed, high-flow pump.

3. The hydraulic power generation system according to claim 2, characterized in that: An accumulator is connected to the outlet of the low-speed and high-flow pump.

4. The hydraulic power generation system according to claim 1 or 3, characterized in that: The impeller system B comprises at least one impeller (1), and the impeller (1) is integrated with a metering pump.

5. The hydraulic power generation system according to claim 1, characterized in that: The impeller system B can rotate under the action of wind impact force or water flow impact force.

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