Solar photovoltaic water lifting system

Abstract

The utility model discloses a solar photovoltaic water lifting system which comprises a photovoltaic array, an energy storage inverter, a battery and a water pump assembly, the photovoltaic assembly is connected with the energy storage inverter, the energy storage inverter is connected with the water pump assembly, and the battery is connected with the energy storage inverter and used for storing redundant electric energy and releasing the electric energy to supply power to the water pump assembly. The water pump assembly comprises a first motor and a second motor, an output shaft of the first motor is connected with the input end of a speed reducer, and the output end of the speed reducer is connected with a clutch and connected with an output shaft of the second motor through the clutch. Under the condition that the illumination intensity is sufficient, the energy storage inverter converts direct current output by the photovoltaic array into alternating current to supply power to the water pump assembly; when the electric energy converted by the photovoltaic array is residual, the residual electric energy is stored in the battery; under the condition that the illumination intensity is insufficient, the electric energy stored in the battery and the direct current output by the photovoltaic array are converted into alternating current through the energy storage inverter to supply power to the water pump assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic water pumping technical field more particularly, relate to a solar photovoltaic water pumping system. BACKGROUND

[0002] Photovoltaic water pumping is the radiant energy of the sun is converted into electrical energy, and then the water pump is driven by electrical energy to achieve the effect of pumping water. The solar photovoltaic water pumping system includes a photovoltaic array, an inverter and a water pump. The photovoltaic array is a device that converts the radiant energy of the sun directly into electrical energy. The inverter is a device that converts direct current into alternating current to achieve inversion. The water pump is a multi-stage centrifugal pump with a wide and efficient working area, equipped with a driving motor to form a water pumping device.

[0003] At present, the solar photovoltaic water pumping system is greatly affected by light. It cannot pump water under any sunlight. There is a "pumping threshold". When the light intensity is greater than the "pumping threshold", the water pump can start normal pumping. When the output power of the photovoltaic array is greater than the rated power of the water pump, the water pump still has a margin of power generation while operating. When the light intensity is weak, that is, the output power of the photovoltaic array is less than the "pumping threshold", the system cannot drive the water pump to pump water, but the photovoltaic array still outputs a certain power of electrical energy. This leads to energy waste in the morning, noon and evening of a sunny day. At the same time, the driving motor used to drive the water pump to operate usually adopts a high-power motor, which has the problem of difficult starting. A large current is required to drive at the starting moment, which consumes a large amount of electrical energy, resulting in a large load of the driving circuit and the need for a high-power output inverter to power the driving motor.

[0004] Therefore, a new scheme is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects of the prior art and providing a solar photovoltaic water pumping system.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A solar photovoltaic water pumping system includes a photovoltaic array, an energy storage inverter, a battery and a water pump assembly. The photovoltaic assembly is connected to the energy storage inverter. The energy storage inverter is connected to the water pump assembly and supplies power to the water pump assembly. The battery is connected to the energy storage inverter and is used to store excess electrical energy and release electrical energy to power the water pump assembly. The water pump assembly includes a first motor and a second motor. The output shaft of the first motor is connected to the input end of a speed reducer. The output end of the speed reducer is connected to a clutch and connected to the output shaft of the second motor through the clutch. The power of the first motor is less than the power of the second motor.

[0008] Further, the clutch comprises a first base connected with the output end of the speed reducer, and a second base connected with the output shaft of the second motor, a plurality of first wedges are circumferentially and evenly distributed on the side of the first base facing the second base, a plurality of second wedges are circumferentially and evenly distributed on the side of the second base facing the first base, one second wedge is arranged between two adjacent first wedges, the first wedges rotate with the first base, and the second base rotates by driving the second wedges, and when the rotating speed of the second base is greater than that of the first base, the first base is separated from the second base by the disengagement of the first wedges and the second wedges.

[0009] Further, the first wedge is in a trapezoidal structure, the first wedge comprises a first inclined curved surface and a first inclined surface, the first inclined curved surface and the first inclined surface are inclined in the same direction, and the inclination angle of the first inclined curved surface is smaller than that of the first inclined surface, the second wedge is in a trapezoidal structure, the second wedge comprises a second inclined curved surface and a second inclined surface, the second inclined curved surface and the second inclined surface are inclined in the same direction, and the inclination angle of the second inclined curved surface is smaller than that of the second inclined surface, the first inclined curved surface corresponds to the second inclined curved surface and is inclined in the same direction with the second inclined curved surface, and the first inclined surface corresponds to the second inclined surface and is inclined in the same direction with the second inclined surface.

[0010] The utility model discloses beneficial effects are:

[0011] 1. In the utility model, under the condition of sufficient light intensity, the energy storage inverter converts the direct current of photovoltaic array output into alternating current to power the water pump assembly, so that the water pump runs, when the energy converted by the photovoltaic array has surplus, the surplus energy is stored in the battery, under the condition of insufficient light intensity, the energy stored in the battery and the direct current output by the photovoltaic array are converted into alternating current to power the water pump assembly through the energy storage inverter, so that the water pump runs.

[0012] 2. In the utility model, the first motor drives the output shaft of the second motor to rotate through the clutch, so that the rotor of the second motor is in a motion state, then the second motor is powered, and the rotating speed of the rotor is further improved, so that the second motor is started, thereby avoiding the need for large current driving and consuming a large amount of electric energy in the starting moment of the second motor. ACCURACY OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the solar photovoltaic water lifting system in the embodiment;

[0014] Figure 2 It is a structural schematic view of the clutch in the embodiment;

[0015] Figure 3 It is a structural schematic view of the first base in the embodiment;

[0016] Figure 4 A structure schematic view of the second base in the embodiment;

[0017] Figure 5 A use schematic view of the clutch in the embodiment.

[0018] The figure mark: photovoltaic array 1, energy storage inverter 2, battery 3, water pump assembly 4, first motor 41, second motor 42, clutch 43, first base 431, second base 432, first wedge 433, second wedge 434, first inclined curved surface 435, first inclined surface 436, second inclined curved surface 437, second inclined surface 438, speed reducer 44. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] Embodiment: a solar photovoltaic water pumping system, as shown in the figure, comprising photovoltaic array 1, energy storage inverter 2, battery 3 and water pump assembly 4, photovoltaic array 1 is connected with energy storage inverter 2, energy storage inverter 2 is connected with water pump assembly 4 and battery 3;Wherein, photovoltaic array 1 is used for converting the radiant energy of solar energy into electric energy;Energy storage inverter 2 is used for converting direct current into alternating current to realize inversion, and supplies power to water pump assembly 4, and simultaneously realizes the storage and bidirectional flow of electric energy by being connected with battery 3;Battery 3 is used for storing excess electric energy and releasing electric energy to power water pump assembly 4. Figure 1 In the case of sufficient light intensity, photovoltaic array 1 converts the radiant energy of solar energy into electric energy, and through energy storage inverter 2, direct current output by photovoltaic array 1 is converted into alternating current to power water pump assembly 4;When the electric energy converted by photovoltaic array 1 is surplus, then the electric energy output by photovoltaic array 1 can be charged to battery 3 through energy storage inverter 2;In the case of insufficient light intensity, the electric energy output by photovoltaic array 1 cannot meet the power demand of water pump assembly 4, at this time, the electric energy stored in battery 3 and the direct current output by photovoltaic array 1 are converted into alternating current to power water pump assembly 4 through energy storage inverter 2.

[0021]

[0022] ​The water pump assembly 4 comprises a first motor 41, a second motor 42 and a water pump, an output shaft of the first motor 41 is connected to an input end of a speed reducer 44, an output end of the speed reducer 44 is connected with a clutch 43, and the output shaft of the second motor 42 is connected with the output end of the speed reducer 44 through the clutch 43, the second motor 42 is used as a driving motor of the water pump and is used for driving the water pump to operate, the first motor 41 is a small-power motor (such as 2KW), and the second motor 42 is a large-power motor (such as 45KW).

[0023] In use, the first motor 41 is powered, the first motor 41 drives the output shaft of the second motor 42 to rotate through the clutch 43, the rotor of the second motor 42 is in a motion state, then the second motor 42 is powered, and the rotating speed of the rotor of the second motor 42 is further improved, so that the second motor 42 is started, thereby avoiding the need of large current for driving the second motor 42 at the starting moment and the need of consuming a large amount of electric energy.

[0024] Further, as shown in Figure 2 The clutch 43 comprises a first base 431 and a second base 432, the first base 431 is connected with the output end of the speed reducer 44, the second base 432 is connected with the output shaft of the second motor 42, the first base 431 and the second base 432 are circular ring structures, a plurality of first wedges 433 are uniformly distributed on one side of the first base 431 facing the second base 432, a plurality of second wedges 434 are uniformly distributed on one side of the second base 432 facing the first base 431, one second wedge 434 is arranged between every two adjacent first wedges 433, and the first wedges 433 and the second wedges 434 are arranged in a spaced manner.

[0025] In use, the first base 431 and the second base 432 are in contact, and each second wedge 434 is located between two adjacent first wedges 433. When the first motor 41 drives the first base 431 to rotate through the speed reducer 44, the first wedges 433 rotate with the first base 431, the first wedges 433 drive the second wedges 434 to rotate by abutting against the second wedges 434, the second wedges 434 drive the second base 432 to rotate, and the second base 432 drives the output shaft of the second motor 42 to rotate, so that the rotor of the second motor 42 is in a motion state, then the second motor 42 is powered, and the rotating speed of the rotor of the second motor 42 is further improved, so that the second motor 42 is started; at the same time, the rotating speed of the second base 432 is improved due to the improvement of the rotating speed of the output shaft of the second motor 42, the rotating speed of the second base 432 is greater than that of the first base 431, and the rotating speed of the second base 432 is gradually improved, the second wedges 434 are separated from the first wedges 433, so that the first base 431 and the second base 432 are separated, and the first base 431 and the second base 432 are separated to avoid damaging the first motor 41 and the speed reducer 44.

[0026] Further, as shown inFigures 3-4 As shown, the first wedge 433 has a trapezoidal structure and includes a first inclined surface 435 and a first inclined surface 436. The first inclined surface 435 and the first inclined surface 436 are inclined in the same direction, and the inclination angle of the first inclined surface 435 is smaller than the inclination angle of the first inclined surface 436. The second wedge 434 has a trapezoidal structure and includes a second inclined surface 437 and a second inclined surface 438. The second inclined surface 437 and the second inclined surface 438 are inclined in the same direction, and the inclination angle of the second inclined surface 437 is smaller than the inclination angle of the second inclined surface 438. When the second wedge 434 is located between two adjacent first wedges 433, the first inclined surface 435 corresponds to the second inclined surface 437 and is inclined in the same direction as the second inclined surface 437, and the first inclined surface 436 corresponds to the second inclined surface 438 and is inclined in the same direction as the second inclined surface 438.

[0027] like Figure 5 As shown, when the first base 431 rotates, the first wedge 433 rotates with the first base 431. The first wedge 433 drives the second wedge 434 to rotate by abutting the second wedge 434's second inclined surface 438 with its first inclined surface 436. The rotation of the second wedge 434 drives the second base 432 to rotate. When the second motor 42 is powered on and started, the rotation speed of the second base 432 gradually increases and gradually exceeds the rotation speed of the first base 431. Since the first inclined surface 435 and the second inclined surface 437 are adapted to each other and are inclined surfaces, as the rotation speed of the second base 432 gradually increases, the contact area between the first inclined surface 435 and the second inclined surface 437 gradually decreases until the second inclined surface 437 disengages from the first inclined surface 435, causing the second wedge 434 and the first wedge 433 to disengage, thereby separating the second base 432 from the first base 431.

[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A solar photovoltaic water lifting system, characterized in that, The system includes a photovoltaic array (1), an energy storage inverter (2), a battery (3), and a water pump assembly (4). The photovoltaic array is connected to the energy storage inverter (2), and the energy storage inverter (2) is connected to the water pump assembly (4) and supplies power to the water pump assembly (4). The battery (3) is connected to the energy storage inverter (2) and is used to store excess electrical energy and release electrical energy to supply power to the water pump assembly (4). The water pump assembly (4) includes a first motor (41) and a second motor (42). The output shaft of the first motor (41) is connected to the input end of a reducer (44). The output end of the reducer (44) is connected to a clutch (43) and is connected to the output shaft of the second motor (42) through the clutch (43). The power of the first motor (41) is less than the power of the second motor (42).

2. The solar photovoltaic water lifting system according to claim 1, characterized in that, The clutch (43) includes a first base (431) for connecting to the output end of the reducer (44) and a second base (432) for connecting to the output shaft of the second motor (42). The first base (431) has a plurality of first wedges (433) evenly distributed circumferentially on the side facing the second base (432). The second base (432) has a plurality of second wedges (434) evenly distributed circumferentially on the side facing the first base (431). A second wedge (434) is provided between two adjacent first wedges (433). The first wedges (433) rotate with the first base (431) and drive the second wedges (434) to make the second base (432) rotate. When the rotation speed of the second base (432) is greater than the rotation speed of the first base (431), the second base (432) disengages from the first base (431) through the first wedges (433) and the second wedges (434).

3. The solar photovoltaic water lifting system according to claim 2, characterized in that, The first wedge (433) has a trapezoidal structure and includes a first inclined surface (435) and a first inclined surface (436). The first inclined surface (435) and the first inclined surface (436) are inclined in the same direction, and the inclination angle of the first inclined surface (435) is smaller than the inclination angle of the first inclined surface (436). The second wedge (434) has a trapezoidal structure and includes a second inclined surface (437) and a second inclined surface (438). The second inclined surface (437) and the second inclined surface (438) are inclined in the same direction, and the inclination angle of the second inclined surface (437) is smaller than the inclination angle of the second inclined surface (438). The first inclined surface (435) corresponds to the second inclined surface (437) and is inclined in the same direction as the second inclined surface (437). The first inclined surface (436) corresponds to the second inclined surface (438) and is inclined in the same direction as the second inclined surface (438).

Images