Efficient photovoltaic water pump

Abstract

The invention discloses an efficient photovoltaic water pump and relates to the technical field of water pumps. A light energy conversion unit converts light energy into mechanical energy and drives a clutch to rotate; when illumination is weak, the rotating speed of the clutch is smaller than a first threshold value, the clutch is not combined with the flywheel, and the water pumping assembly does not work; when illumination is enhanced, the rotating speed of the clutch is increased to be larger than a first threshold value, the clutch is combined with the flywheel and drives the flywheel to rotate to store energy, and the flywheel drives the water pumping assembly to work through the continuously variable transmission; if the illumination is weakened to reduce the rotating speed of the clutch, the clutch is separated from the flywheel only when the rotating speed is reduced to a lower second threshold value, and frequent start and stop of the clutch caused by illumination fluctuation are prevented; when the rotating speed of the flywheel is smaller than or equal to a third threshold value, the power of the water pumping assembly increases along with the flywheel rotating speed; when the rotating speed of the flywheel is larger than a third threshold value, the regulation and control mechanism automatically increases the transmission ratio of the continuously variable transmission, limits the power of the water pumping assembly and avoids overload of the water pumping assembly; the photovoltaic water pump can adapt to illumination changes and work efficiently.

Description

Technical Field

[0001] This invention relates to the field of water pump technology, and in particular to a high-efficiency photovoltaic water pump. Background Technology

[0002] Photovoltaic water pump systems directly convert solar energy into mechanical energy for pumping water, making them valuable in areas without or lacking electricity. In existing technologies, photovoltaic water pumps are driven directly by photovoltaic panels, which can cause the motor to rotate at high speeds under strong sunlight, potentially leading to pump overload.

[0003] The information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The main objective of this invention is to provide a high-efficiency photovoltaic water pump, which aims to solve the technical problem that the existing technology lacks photovoltaic water pumps that can adapt to changes in sunlight and prevent overload.

[0005] To achieve the above objectives, a high-efficiency photovoltaic water pump is proposed, comprising:

[0006] A photovoltaic power module includes a light energy conversion unit and a motor, wherein the light energy conversion unit is used to convert light energy into electrical energy and drive the motor to work;

[0007] An energy storage component includes a clutch and a rotatably connected flywheel and base; the two ends of the clutch are respectively connected to the electric motor and the flywheel for transmission; when the speed of the clutch is greater than a first threshold, the transmission between the clutch and the flywheel is engaged; when the clutch and the flywheel are engaged, the speed of the clutch drops to a second threshold, and the transmission between the clutch and the flywheel is disengaged, where the second threshold is less than the first threshold.

[0008] Pump assembly;

[0009] The transmission assembly includes a control mechanism and a continuously variable transmission (CVT), wherein the CVT is used to transmit power from the flywheel to the water pump assembly; and the control mechanism is used to adjust the transmission ratio of the CVT according to the rotational speed of the flywheel to control the safe operation of the water pump assembly.

[0010] The principle of this photovoltaic water pump: In environments with weak sunlight, the solar energy conversion unit converts less electrical energy, resulting in lower power for the motor. At this time, the clutch speed is below the first threshold, the clutch does not engage with the flywheel, and the pump assembly does not operate. When sunlight is strong, the solar energy conversion unit drives the motor to rotate at a higher speed. If the clutch speed exceeds the first threshold, the clutch engages with the flywheel and drives it to rotate. The continuously variable transmission (CVT) transmits the flywheel's power to the pump assembly. At this time, the flywheel has significant kinetic energy, allowing the pump assembly to obtain sufficient kinetic energy to pump water. When the clutch speed drops from above the first threshold to the second threshold, the clutch disengages from the flywheel. When the flywheel speed is above the first threshold but below the third threshold, the pump assembly's power gradually increases. When the flywheel speed equals the third threshold, the pump assembly's power reaches its maximum. When the flywheel speed exceeds the third threshold, the control mechanism increases the CVT's transmission ratio, causing the pump assembly's power to decrease and preventing overload.

[0011] Preferably, the clutch includes a turntable, a locking block, a first spring, and a friction pad; the turntable is connected to the electric motor for transmission, and the turntable has a radially extending mounting groove with an outward opening; the locking block and the first spring are both located in the mounting groove, and the two ends of the first spring are respectively connected to the locking block and the turntable; the friction pad is disposed on the side wall of the mounting groove and is used to increase the friction between the locking block and the side wall of the mounting groove; the flywheel has a receiving groove for being fitted onto the outside of the turntable, and the side wall of the receiving groove has a locking groove that cooperates with the locking block.

[0012] When the rotational speed of the turntable is less than or equal to the first threshold, the locking block does not engage with the slot under the action of the first spring, and the transmission between the clutch and the flywheel is disconnected. When the rotational speed of the turntable is greater than the first threshold, part of the locking block extends out of the mounting slot and engages with the slot, while the other part remains in the mounting slot, allowing the turntable to drive the flywheel to rotate through the locking block. The turntable is located in the receiving slot of the flywheel, so that the axial position of the turntable and the flywheel is locked in advance, and the locking block only needs to move radially outward to achieve engagement with the flywheel.

[0013] Preferably, the continuously variable transmission includes a mounting bracket, a conveyor belt, a sliding member, and two oppositely inverted conical wheels with parallel axes;

[0014] The conical wheel is rotatably connected to the mounting bracket, and the bottom area of ​​the conical wheel is larger than the top area; wherein the conical wheel with its bottom surface facing the flywheel is called conical wheel a, and the other conical wheel is called conical wheel b. The conical wheel a is axially connected to a driven gear, and the flywheel is axially connected to a driving gear that meshes with the driven gear.

[0015] The conveyor belt passes through the sliding member and is sleeved on the outside of the two conical wheels. In the initial state, the radius of the contact area between the conical wheel a and the conveyor belt is greater than the radius of the contact area between the conical wheel b and the conveyor belt.

[0016] The sliding member is slidably connected to the mounting frame, and the sliding member can drive the conveyor belt to move along the axial direction of the conical wheel;

[0017] The control mechanism is used to drive the sliding component to move according to the rotational speed of the flywheel.

[0018] The continuously variable transmission (CVT) employs a structure with two inverted conical pulleys. Conical pulley a is used to input power via a driving gear and a driven gear, while conical pulley b is used to output power to the water pump assembly. The conveyor belt transmits power from conical pulley a to conical pulley b. A sliding member engages with the conveyor belt and drives it to move axially along the conical pulleys. The control mechanism moves the sliding member according to the flywheel's rotational speed, causing the position of the conveyor belt engaging with the two conical pulleys to change. This alters the transmission ratio between conical pulley a and conical pulley b, thereby adjusting the input power to the water pump assembly.

[0019] Preferably, the control mechanism includes a wedge block, a second spring, a conical disc, a third spring, and a connecting rod;

[0020] The wedge block is slidably disposed on the flywheel along the radial direction of the flywheel, and the two ends of the second spring are respectively connected to the wedge block and the flywheel;

[0021] The conical disc is sleeved on the outside of the flywheel and axially connected to the connecting rod. When the wedge block moves radially, it abuts against the conical surface of the conical disc, causing the conical disc to move axially. The connecting rod passes through the mounting bracket and is connected to the sliding member. The third spring is sleeved on the outside of the connecting rod, and the two ends of the third spring are respectively connected to the conical disc and the mounting bracket.

[0022] When the flywheel speed is less than or equal to the third threshold, the wedge block will not squeeze the conical disc to move axially under the action of the second spring; when the flywheel speed is greater than the third threshold, the wedge block squeezes the conical disc radially under the action of centrifugal force. Since the contact surface between the wedge block and the conical disc is inclined, the wedge block can drive the conical disc to move axially. The conical disc drives the sliding component to move through the connecting rod to adjust the position of the conveyor belt on the conical wheel, thereby changing the transmission ratio of the continuously variable transmission.

[0023] Preferably, the sliding component includes a bracket and a first stop; the bracket is slidably disposed on the mounting frame and connected to the connecting rod; the first stop is fixed on the bracket, and there are at least two first stops located on both sides of the conveyor belt along its length, and the first stops are used to drive the conveyor belt to move axially along the conical wheel.

[0024] The first stop is used to restrict the movement of the conveyor belt in the direction of the tapered wheel axis. When the sliding member slides, the first stop can abut against the movement of the conveyor belt to change the mating position between the conveyor belt and the tapered wheel.

[0025] Preferably, the sliding member further includes a first tensioning roller for tensioning the conveyor belt; the conveyor belt surrounds the outside of the connecting rod; the first tensioning roller is located between the two first stops and rotatably connected to the first stops, and the connecting rod, the first stops and the first tensioning roller surround to form a first limiting cavity for restricting the conveyor belt.

[0026] The first tensioning roller is used to tension the conveyor belt. In addition, the first tensioning roller, together with the connecting rod, restricts the vertical position of the conveyor belt, preventing the conveyor belt from separating from the two first stops when the first stop moves the conveyor belt.

[0027] Preferably, the sliding component further includes a fourth spring, a lifting platform, and a second tensioning roller; the lifting platform is slidably mounted on the bracket; both ends of the fourth spring are respectively connected to the bracket and the lifting platform; the second tensioning roller is rotatably connected to the lifting platform and is used to tension the conveyor belt.

[0028] The position of the first tensioning roller relative to the support is relatively fixed, while the second tensioning roller can move up and down relative to the support, so that the wrap angle between the conveyor belt and the conical wheel can be adjusted within a large range, allowing the conveyor belt to move relative to the conical wheel; the fourth spring can drive the second tensioning roller to tension the conveyor belt through the lifting platform.

[0029] Preferably, the lifting platform includes a connected mounting plate and two second stops; the mounting plate is slidably disposed on the bracket, and the two ends of the fourth spring are respectively connected to the bracket and the mounting plate; the second tension roller is located between the two second stops and is rotatably connected to the second stops, and the connecting rod, the second stops and the second tension roller surround to form a second limiting cavity for limiting the conveyor belt.

[0030] The second stop further restricts the movement of the conveyor belt along the axis of the conical wheel, making the sliding component move the conveyor belt more smoothly.

[0031] Preferably, it also includes multiple elastic telescopic components; the mounting bracket is provided with multiple connecting grooves, one end of the elastic telescopic component is connected to the bottom of the connecting groove, and the other end of the elastic telescopic component extends out of the connecting groove and is hemispherical; the sliding component is provided with multiple limiting grooves that cooperate with the elastic telescopic component.

[0032] The snap-fit ​​between the elastic telescopic component and the sliding component provides a certain degree of damping when the sliding component slides on the mounting bracket, so that when the centrifugal force of the wedge block changes abruptly, the sliding component will not immediately move axially with the connecting rod.

[0033] Preferably, the contact surfaces of the mounting bracket and the sliding member are provided with damping pads, and friction exists when the two damping pads slide relative to each other.

[0034] The damping pad provides damping to the sliding component and the mounting bracket in the form of friction, so that when the centrifugal force of the wedge block changes abruptly, the sliding component will not immediately move axially with the connecting rod.

[0035] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0036] The photovoltaic water pump of the present invention can adjust the power of the pumping components according to the light intensity and with the cooperation of the mechanical structure. When the light intensity is weak, the clutch is disengaged and the pumping components do not work; when the light intensity is strong, the control mechanism increases the transmission ratio of the continuously variable transmission, so that the power of the pumping components decreases and the pumping components are prevented from overloading. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the high-efficiency photovoltaic water pump according to an embodiment of the present invention;

[0039] Figure 2 This is a top view of the transmission assembly according to an embodiment of the present invention;

[0040] Figure 3 This is a partial cross-sectional view of the transmission assembly according to an embodiment of the present invention;

[0041] Figure 4 for Figure 3 Enlarged view at point P;

[0042] Figure 5 This is a cross-sectional view of the flywheel according to an embodiment of the present invention;

[0043] Figure 6 This is a partial cross-sectional view of the sliding component according to an embodiment of the present invention.

[0044] Icons: 110, Photovoltaic panel; 120, Motor; 211, Turntable; 2111, Mounting slot; 2112, Connecting shaft; 212, Locking block; 213, First spring; 214, Friction pad; 220, Flywheel; 221, Receiving slot; 222, Locking slot; 230, Base; 311, Wedge block; 312, Conical disc; 313, Second spring; 314, Third spring; 315, Connecting rod; 316, Limiting plate; 321, Mounting bracket; 3211, Slider; 322, Conveyor belt; 323, Sliding mechanism Components; 3231, bracket; 3232, first stop block; 3233, first tension roller; 3234, fourth spring; 3235, second tension roller; 3236, mounting plate; 3237, second stop block; 3238, column; 3239, limiting groove; 324, conical wheel a; 325, conical wheel b; 326, driving gear; 327, driven gear; 328, guide rod; 400, plunger pump; 500, elastic telescopic component; 510, limiting pin; 520, fifth spring; 530, locking bolt. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] Example 1:

[0049] The following is combined with Figures 1-6 This describes a high-efficiency photovoltaic water pump according to an embodiment of the present invention.

[0050] This invention designs a high-efficiency photovoltaic water pump, comprising: a photovoltaic power component, including a light energy conversion unit and a motor 120, wherein the light energy conversion unit is used to convert light energy into electrical energy and drive the motor 120 to work; an energy storage component, including a clutch and a flywheel 220 and a base 230 rotatably connected thereto; the two ends of the clutch are respectively connected to the motor 120 and the flywheel 220 for transmission; when the speed of the clutch is greater than a first threshold, the transmission between the clutch and the flywheel 220 is engaged; when the clutch and the flywheel 220 are engaged, the speed of the clutch drops to a second threshold, and the transmission between the clutch and the flywheel 220 is disengaged, wherein the second threshold is less than the first threshold; a pumping component; and a transmission component, including a control mechanism and a continuously variable transmission (CVT), wherein the CVT is used to transmit the power of the flywheel 220 to the pumping component; the control mechanism is used to adjust the transmission ratio of the CVT according to the speed of the flywheel 220 to control the safe operation of the pumping component.

[0051] In environments with low light, the solar energy conversion unit converts less electrical energy, resulting in lower power for the electric motor 120. At this time, the clutch speed is below the first threshold, the clutch does not engage with the flywheel 220, and the pump assembly does not operate. When sunlight is strong, the solar energy conversion unit drives the electric motor 120 at a higher speed. If the clutch speed exceeds the first threshold, the clutch engages with the flywheel 220 and drives it to rotate. The continuously variable transmission (CVT) transmits the power from the flywheel 220 to the pump assembly. At this time, the flywheel 220 has greater kinetic energy, allowing the pump assembly to obtain sufficient kinetic energy to pump water. After the clutch engages with the flywheel 220, if cloud movement causes fluctuations in sunlight intensity, the clutch... The speed of the pump may be less than the first threshold but greater than the second threshold. The transmission between the clutch and the flywheel 220 will not be disengaged, avoiding frequent clutch starts that could lead to clutch wear. Only when the light intensity continuously weakens, causing the clutch speed to continuously decrease to the second threshold, will the transmission between the clutch and the flywheel 220 be disengaged. When the speed of the flywheel 220 is greater than the first threshold but less than the third threshold, the power of the pumping assembly will gradually increase as the speed of the flywheel 220 increases. When the speed of the flywheel 220 equals the third threshold, the power of the pumping assembly reaches its maximum. When the speed of the flywheel 220 is greater than the third threshold, the control mechanism increases the transmission ratio of the continuously variable transmission, causing the power of the pumping assembly to decrease, thus preventing the pumping assembly from overloading.

[0052] The solar energy conversion unit includes a photovoltaic panel 110, which converts solar energy into electrical energy and drives the motor 120 to work.

[0053] The water pump assembly includes a plunger pump 400. The plunger pump 400 uses a crank or eccentric wheel to drive the plunger to reciprocate within the cylinder, changing the volume of the sealed working chamber to achieve oil suction and pressure. In this embodiment, the crank or eccentric wheel of the plunger pump 400 is connected to the output shaft of a continuously variable transmission (CVT). Since the plunger pump 400 is prior art, its specific structure will not be described in detail here.

[0054] Photovoltaic panels can use lightweight, high-strength, and high-efficiency photovoltaic modules, such as the AH5T model, which has a power of 405-420W. The number of photovoltaic panels can be up to 8, so the total power of the photovoltaic panel module is 3.24KW~3.36KW.

[0055] The motor can be a DC brushless motor with a rated power of 2.2KW.

[0056] The plunger pump can be a YN-25 model, with a power of 1.5-2KW.

[0057] The clutch includes a turntable 211, a locking block 212, a first spring 213, and a friction pad 214. The turntable 211 is connected to the motor 120 for transmission. The turntable 211 has a radially extending mounting groove 2111 with an outward opening. The locking block 212 and the first spring 213 are both located in the mounting groove 2111. The two ends of the first spring 213 are respectively connected to the locking block 212 and the turntable 211. The friction pad 214 is disposed on the side wall of the mounting groove 2111 and is used to increase the friction between the locking block 212 and the side wall of the mounting groove 2111. The flywheel 220 has a receiving groove 221 for fitting onto the outside of the turntable 211. The side wall of the receiving groove 221 has a locking groove 222 that mates with the locking block 212.

[0058] A connecting shaft 2112 can be installed on the shaft end face of the turntable 211 facing the motor 120. The connecting shaft 2112 is connected to the rotating shaft of the motor 120 through a coupling. The locking block 212 tends to move radially outward under the action of centrifugal force. However, the elastic force of the first spring 213 acting on the locking block 212 and the friction force between the friction pad 214 and the locking block 212 balance the centrifugal force of the locking block 212. As the rotation speed of the turntable 211 gradually increases, the centrifugal force of the locking block 212 also gradually increases. At this time, the locking block 212 slides along the friction pad 214, the first spring 213 is stretched, and the locking block 212 extends out of the slot of the mounting groove 2111. When the rotation speed of the turntable 211 reaches the first threshold, the locking block 212 is inserted into the slot 222 of the flywheel 220, thereby driving the flywheel 220 to rotate. When the clouds drift, causing the light intensity to fluctuate, the clutch speed is less than the first threshold but greater than the second threshold. Because of the friction between the clutch block 212 and the friction pad 214, the clutch block 212 will not move radially immediately, causing it to disengage from the slot 222. At this time, the transmission between the clutch and the flywheel 220 will not be disconnected, avoiding frequent clutch starts that could lead to clutch wear. Only when the light intensity continues to weaken, causing the clutch speed to continuously decrease to the second threshold, and the centrifugal force of the clutch block 212 to continuously decrease, will the first spring 213 drive the clutch block 212 to overcome the friction between the clutch block 212 and the friction pad 214, causing the clutch block 212 to move radially and disengage from the slot 222. At this time, the transmission between the clutch and the flywheel 220 will be disconnected.

[0059] The turntable 211 can be provided with n mounting slots 2111 at equal intervals along the circumference of the turntable 211. The number of the first spring 213, the locking block 212 and the locking groove 222 is the same as the number of mounting slots 2111.

[0060] The continuously variable transmission (CVT) includes a mounting bracket 321, a conveyor belt 322, a sliding member 323, and two oppositely inverted conical pulleys with parallel axes. The conical pulleys are rotatably connected to the mounting bracket 321, and the base area of ​​each conical pulley is larger than its top area. One conical pulley, with its base facing the flywheel 220, is designated as conical pulley a324, and the other is designated as conical pulley b325. A driven gear 327 is axially connected to conical pulley a324, and a gear meshing with the driven gear 327 is axially connected to the flywheel 220. The drive gear 326; the conveyor belt 322 passes through the sliding member 323 and is sleeved on the outside of the two conical wheels. In the initial state, the radius of the contact part between the conical wheel a324 and the conveyor belt 322 is greater than the radius of the contact part between the conical wheel b325 and the conveyor belt 322; the sliding member 323 is slidably connected to the mounting bracket 321, and the sliding member 323 can drive the conveyor belt 322 to move along the axial direction of the conical wheels; the control mechanism is used to drive the sliding member 323 to move according to the rotational speed of the flywheel 220.

[0061] The shaft of the conical wheel and mounting bracket 321 is coaxial with the conical wheel. In the initial state, that is, when the speed of the flywheel 220 is less than or equal to the third threshold, the flywheel 220 drives the driven gear 327 to rotate through the driving gear 326. The shaft of the driven gear 327 passes through the base 230 and the mounting bracket 321 and is coaxially connected to the conical wheel a324. At this time, the conical wheel a324 drives the conical wheel b325 to rotate through the conveyor belt 322. The shaft of the conical wheel b325 is connected to the crank or eccentric wheel shaft of the plunger pump 400. When the speed of the flywheel 220 is greater than the first threshold but less than or equal to the third threshold, the plunger pump 400 is always in working state. As the light intensity increases, the power of the plunger pump 400 also increases. When the speed of the flywheel 220 reaches the third threshold, the power of the plunger pump 400 reaches its maximum value.

[0062] When the speed of flywheel 220 is greater than the first threshold but less than or equal to the third threshold, the control mechanism is not working. At this time, the position of sliding component 323 relative to mounting bracket 321 is fixed, the contact position of conveyor belt 322 with conical wheel a324 and conical wheel b325 remains unchanged, the radius of conical wheel a324 corresponding to conveyor belt 322 is greater than the radius of conical wheel b325 corresponding to conveyor belt 322, the transmission ratio between the two is less than 1, and the speed of conical wheel b325 is greater than the speed of conical wheel a324.

[0063] The drive gear 326 is axially connected to the flywheel 220, and the drive gear 326 has a through hole in the middle for the clutch to pass through.

[0064] In this embodiment, the flywheel 220 can be in the shape of a stepped shaft, that is, the part of the flywheel 220 that mates with the base 230 has the largest diameter, and the two ends of the flywheel 220 that extend out of the base 230 have smaller diameters. The base 230 can be fitted with L-shaped stops to restrict the axial movement of the flywheel 220.

[0065] The control mechanism includes a wedge block 311, a second spring 313, a conical disc 312, a third spring 314, and a connecting rod 315;

[0066] The wedge block 311 is slidably disposed on the flywheel 220 along the radial direction of the flywheel 220, and the two ends of the second spring 313 are respectively connected to the wedge block 311 and the flywheel 220;

[0067] The conical disc 312 is sleeved on the outside of the flywheel 220 and axially connected to the connecting rod 315. When the wedge block 311 moves radially, it can abut against the conical surface of the conical disc 312, causing the conical disc 312 to move axially. The connecting rod 315 passes through the mounting bracket 321 and is connected to the sliding member 323. The third spring 314 is sleeved on the outside of the connecting rod 315, and the two ends of the third spring 314 are respectively connected to the conical disc 312 and the mounting bracket 321.

[0068] In the initial state, the conical surface of the conical disk 312 does not contact the wedge block 311, and the shaft end face of the conical disk 312 also has a gap with the flywheel 220. The third spring 314 can be in an unforced or compressed state. The end of the connecting rod 315 away from the conical disk 312 passes through the mounting bracket 321 and can be equipped with a limiting plate 316. The limiting plate 316 abuts against the mounting bracket 321 to restrict the axial movement of the connecting rod 315 and prevent the conical disk 312 from moving toward the flywheel 220 under the action of the third spring 314.

[0069] The cross-section of the wedge block 311 can be a right trapezoid. The inclined surface of the wedge block 311 is used to abut against the conical surface of the conical disk 312. The right-angled end face of the wedge block 311 is connected to the second spring 313. When the rotational speed of the flywheel 220 exceeds the third threshold, the centrifugal force on the wedge block 311 increases, and the second spring 313 is stretched by the wedge block 311. At this time, the conical disc 312 moves axially under the radial compression of the wedge block 311 and compresses the third spring 314. The connecting rod 315 drives the conveyor belt 322 to move away from the flywheel 220 through the sliding member 323. At this time, the radius of the part of the conical wheel a324 that contacts the conveyor belt 322 decreases relative to the initial state, and the radius of the part of the conical wheel b325 that contacts the conveyor belt 322 increases relative to the initial state. Therefore, the transmission ratio of the conical wheel a324 and the conical wheel b325 increases, and the rotational speed of the conical wheel b325 decreases, so as to avoid the input speed of the plunger pump 400 from further increasing, which would cause the plunger pump 400 to overload.

[0070] The elastic coefficient and size of the third spring 314 can be set as needed to avoid excessive pressure exerted by the third spring 314 on the conical disk 312, which would prevent the conical disk 312 from moving axially.

[0071] The sliding component 323 includes a bracket 3231 and a first stop 3232; the bracket 3231 is slidably disposed on the mounting frame 321 and connected to the connecting rod 315; the first stop 3232 is fixed on the bracket 3231, and there are at least two first stops 3232, which are located on both sides of the length direction of the conveyor belt 322 respectively, and the first stops 3232 are used to drive the conveyor belt 322 to move along the axial direction of the conical wheel.

[0072] The first stop 3232 is fixed below the bracket 3231. When the bracket 3231 moves along the axial direction of the connecting rod 315, the first stop 3232 will abut against the conveyor belt 322 and move together, so that the conveyor belt 322 cooperates with the conical wheel a324 and the conical wheel b325 at different positions.

[0073] In this embodiment, the mounting bracket 321 is provided with a guide rod 328 parallel to the connecting rod 315. The upper end of the bracket 3231 is slidably disposed on the guide rod 328, and the lower end of the bracket 3231 is slidably connected to the mounting bracket 321. Specifically, the lower end of the bracket 3231 may be provided with a sliding groove parallel to the connecting rod 315, the sliding groove extending along the axial direction of the connecting rod 315, and the mounting bracket 321 is provided with a slider 3211 that cooperates with the sliding groove.

[0074] The sliding member 323 also includes a first tensioning roller 3233 for tensioning the conveyor belt 322; the conveyor belt 322 surrounds the outside of the connecting rod 315; the first tensioning roller 3233 is located between two first stops 3232 and is rotatably connected to the first stops 3232, and the connecting rod 315, the first stops 3232 and the first tensioning roller 3233 surround to form a first limiting cavity for limiting the conveyor belt 322.

[0075] Let point A be the lowest point of contact between conical wheel a324 and conveyor belt 322, and point B be the lowest point of contact between conical wheel b325 and conveyor belt 322.

[0076] Let the upper half of conveyor belt 322 be conveyor belt m, and the lower half of conveyor belt 322 be conveyor belt n.

[0077] The height of the first tensioning roller 3233 is at least higher than either point A or point B, so that the first tensioning roller 3233 can tension the conveyor belt n, making the wrap angle between the conveyor belt 322 and the conical wheel larger, so that the conveyor belt 322 can effectively drive the conical wheel to rotate.

[0078] The connecting rod 315 and the first tension roller 3233 restrict the up and down movement of the conveyor belt n. When the first stop block 3232 drives the conveyor belt n to move axially along the connecting rod 315, the conveyor belt n will not swing up and down, thus disengaging from the first stop block 3232.

[0079] The sliding component 323 also includes a fourth spring 3234, a lifting platform, and a second tensioning roller 3235; the lifting platform is slidably mounted on the bracket 3231; the two ends of the fourth spring 3234 are respectively connected to the bracket 3231 and the lifting platform; the second tensioning roller 3235 is rotatably connected to the lifting platform and is used to tension the conveyor belt 322.

[0080] Let point C be the highest point of contact between conical wheel a324 and conveyor belt 322, and point D be the highest point of contact between conical wheel b325 and conveyor belt 322; the height of the second tensioning roller 3235 is at least higher than either point C or point D, so that the second tensioning roller 3235 can tension the conveyor belt m.

[0081] When the second tensioning roller 3235 tensions the conveyor belt m, the fourth spring 3234 is in a compressed state. The fourth spring 3234 presses the lifting platform to move downward, causing the second tensioning roller 3235 to abut against the conveyor belt m from top to bottom, thereby achieving the tensioning effect.

[0082] The position of the second tension roller 3235 can be adjusted up and down, while the position of the first tension roller 3233 is relatively fixed. The distribution of the tension rollers, one static and one dynamic, ensures that the tension rollers can provide good tension to the conveyor belt 322 when the conveyor belt 322 is engaged with the conical wheel at different positions.

[0083] It should be noted that the surfaces of the first tension roller 3233, the second tension roller 3235, and the connecting rod 315 are relatively smooth. When the conveyor belt 322 slides on the surfaces of the first tension roller 3233, the second tension roller 3235, and the connecting rod 315, the conveyor belt 322 runs smoothly and is not affected by friction.

[0084] The lifting platform includes a connected mounting plate 3236 and two second stops 3237; the mounting plate 3236 is slidably mounted on the bracket 3231; the two ends of the fourth spring 3234 are respectively connected to the bracket 3231 and the mounting plate 3236; the second tension roller 3235 is located between the two second stops 3237 and is rotatably connected to the second stops 3237; the connecting rod 315, the second stops 3237 and the second tension roller 3235 surround to form a second limiting cavity for limiting the conveyor belt 322.

[0085] The connecting rod 315 and the second tension roller 3235 restrict the up and down movement of the conveyor belt m. ​​When the second stop 3237 drives the conveyor belt m to move axially along the connecting rod 315, the conveyor belt m will not swing up and down, thus disengaging from the second stop 3237.

[0086] In this embodiment, the bracket 3231 may be provided with at least two uprights 3238 penetrating the mounting plate 3236, and the fourth spring 3234 is sleeved on the outside of the uprights 3238. There may be four uprights 3238 distributed at the four corners of the mounting plate 3236, and the axis of the uprights 3238 is perpendicular to the surface of the mounting plate 3236. The uprights 3238 play a guiding and limiting role for the mounting plate 3236.

[0087] The high-efficiency photovoltaic water pump also includes multiple elastic expansion joints 500; the mounting bracket 321 is provided with multiple connecting grooves, one end of the elastic expansion joint 500 is connected to the bottom of the connecting groove, and the other end of the elastic expansion joint 500 extends out of the connecting groove and is hemispherical; the sliding member 323 is provided with multiple limiting grooves 3239 that cooperate with the elastic expansion joint 500.

[0088] The conveyor belt 322 moves axially on the conical wheel due to the centrifugal force of the wedge block 311. As the conveyor belt 322 moves on the conical wheel, the centrifugal force of the wedge block 311 may change. For example, if the speed of the flywheel 220 decreases, the centrifugal force of the wedge block 311 decreases. The conical disc 312 drives the conveyor belt 322 towards the flywheel 220 via the connecting rod 315 and the sliding member 323. Multiple elastic telescopic members 500 are provided on the mounting frame 321. When the elastic telescopic member 500 engages with the limiting groove 3239 of the sliding member 323, it restricts the movement of the sliding member 323. Because the part where the elastic telescopic member 500 engages with the limiting groove 3239 is hemispherical and relatively smooth, the elastic telescopic member 500 effectively controls the movement of the sliding member 323. With limited limitations, the elastic telescopic member 500 can dampen the sliding member 323, so that when the centrifugal force of the wedge block 311 changes abruptly, the sliding member 323 will not immediately move axially with the connecting rod 315; when the change in centrifugal force of the wedge block 311 reaches a certain threshold, the conical disk 312 is either squeezed by the wedge block 311 or pushed by the third spring 314. The conical disk 312 drives the sliding member 323 to squeeze the elastic telescopic member 500 through the connecting rod 315, so that the elastic telescopic member 500 is pressed back into the connecting groove. At this time, the sliding member 323 can move relatively smoothly relative to the mounting bracket 321 until the elastic telescopic member 500 re-fits with the limiting groove 3239 at another position, and the movement of the sliding member 323 temporarily stops.

[0089] The number of elastic telescopic members 500 can be two, and the line connecting the two elastic telescopic members 500 is perpendicular to the axis of the conical wheel. The sliding member 323 is provided with multiple pairs of limiting grooves 3239 arranged along the axis of the conical wheel. When the elastic telescopic member 500 engages with the limiting grooves 3239 at different positions, the conveyor belt 322 engages with different positions of the conical wheel, causing the transmission ratio of the continuously variable transmission to change accordingly.

[0090] The mass of the wedge block 311, the elastic modulus and dimensions of the second spring 313, the elastic modulus and dimensions of the third spring 314, the elastic modulus and dimensions of the fourth spring 3234, and the dimensions of the elastic telescopic component 500 and the limiting groove 3239 can be set as needed.

[0091] The elastic telescopic component 500 may include a limiting pin 510, a fifth spring 520, and a locking bolt 530. The mounting bracket 321 has mounting holes and threaded holes with progressively increasing diameters and axial communication. The limiting pin 510 is slidably disposed in the mounting hole, with one end extending out of the mounting hole and engaging with a limiting groove 3239. The other end of the limiting pin 510 is located within the threaded hole and connected to a cover, which can slide axially within the threaded hole. The locking bolt 530 engages with the threaded hole. One end of the fifth spring 520 abuts against the cover of the limiting pin 510, and the other end abuts against the locking bolt 530. A connecting groove is formed in the cavity created by the locking bolt 530 near the end face of the fifth spring 520, the side wall of the threaded hole, and the side wall of the mounting hole.

[0092] Working process of high-efficiency photovoltaic water pump:

[0093] In a low-intensity light environment, the output power of the photovoltaic panel 110 is low, the speed of the motor 120 is slow and below the first threshold, the speed of the turntable 211 directly driven by the motor 120 is also below the first threshold, the locking block 212 does not extend out of the mounting slot 2111 of the turntable 211 under the action of the first spring 213, the transmission between the flywheel 220 and the turntable 211 is disconnected, and the plunger pump 400 does not work.

[0094] In a medium-intensity light environment, the output power of the photovoltaic panel 110 increases, and the speed of the motor 120 increases and exceeds the first threshold but is less than or equal to the third threshold. At this time, the locking block 212 moves outward along the radial direction of the turntable 211 under the action of centrifugal force and extends out of the mounting groove 2111 to cooperate with the locking groove 222 of the flywheel 220. The turntable 211 drives the flywheel 220 to rotate, and the power of the flywheel 220 is transmitted to the conical wheel a324 through the driving gear 326 and the driven gear 327. The conical wheel a324 drives the conical wheel b325 to rotate through the conveyor belt 322, and the conical wheel b325 then drives the plunger pump 400 to work. At this time, the wedge block 311 cannot drive the conical disc 312 to move axially. The sliding member 323 is locked to the mounting bracket 321 through the elastic telescopic member 500, so that the conveyor belt 322 is relatively fixed in the axial direction of the conical wheel. The transmission ratio between the conical wheel a324 and the conical wheel b325 is relatively fixed and less than 1. The continuously variable transmission transmits the rotation of the flywheel 220 to the plunger pump 400 with a fixed transmission ratio.

[0095] As the rotational speed of flywheel 220 gradually increases, the power of plunger pump 400 gradually increases. When the rotational speed of flywheel 220 equals the third threshold, the power of plunger pump 400 reaches its maximum value. At this time, conical disk 312 still does not move axially.

[0096] As the light intensity gradually decreases to low intensity, until the speed of the motor 120 drops below the first threshold, the transmission between the turntable 211 and the flywheel 220 is disconnected. However, due to the large rotational inertia of the flywheel 220, the flywheel 220 will continue to transmit power to the plunger pump 400 through the continuously variable transmission, so that the plunger pump 400 will not stop working immediately.

[0097] In a high-intensity light environment, the output power of the photovoltaic panel 110 is high, and the speed of the motor 120 is further increased, causing the speed of the flywheel 220 to exceed the third threshold. Under the action of centrifugal force, the wedge block 311 abuts against the conical disk 312, causing it to move axially. The conical disk 312 compresses the third spring 314 and drives the sliding member 323 away from the flywheel 220 through the connecting rod 315. The sliding member 323 is freed from the restriction of the elastic telescopic member 500 and drives the conveyor belt 322 to slide. The radius of the part of the conical wheel a324 that contacts the conveyor belt 322 decreases, and the radius of the part of the conical wheel b325 that contacts the conveyor belt 322 increases, which increases the transmission ratio between the conical wheel a324 and the conical wheel b325. The power of the plunger pump 400 will not increase further, thus causing an overload phenomenon.

[0098] Example 2

[0099] This embodiment is largely the same as the scheme of Embodiment 1, except that the elastic telescopic member 500 is omitted in this embodiment, and the sliding member 323 is not provided with a limiting groove 3239; while the contact surfaces of the mounting bracket 321 and the sliding member 323 are provided with damping pads, and there is friction when the two damping pads slide relative to each other.

[0100] The damping pads can be rubber pads. Rubber pads have a high coefficient of friction. When the sliding component 323 moves relative to the mounting bracket 321, it will be affected by the friction between the damping pads. When the conical disk 312 is relatively stationary in the axial direction, the mechanical factors such as the squeezing force of the wedge block 311 on the conical disk 312, the elastic force of the third spring 314, and the friction of the damping pads on the sliding component 323 will reach a relatively balanced state. When the conical disk 312 suddenly moves from the stationary axial direction, there is a large static friction between the damping pads. Only by overcoming the static friction can the sliding component 323 move relative to the mounting bracket 321, so that when the centrifugal force of the wedge block 311 changes abruptly, the sliding component 323 will not immediately move axially with the connecting rod 315.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A high-efficiency photovoltaic water pump, characterized in that, include: A photovoltaic power module includes a light energy conversion unit and a motor, wherein the light energy conversion unit is used to convert light energy into electrical energy and drive the motor to work; An energy storage component includes a clutch and a rotatably connected flywheel and base; the two ends of the clutch are respectively connected to the electric motor and the flywheel for transmission; when the speed of the clutch is greater than a first threshold, the transmission between the clutch and the flywheel is engaged; when the clutch and the flywheel are engaged, the speed of the clutch drops to a second threshold, and the transmission between the clutch and the flywheel is disengaged, where the second threshold is less than the first threshold. Pump assembly; The transmission assembly includes a control mechanism and a continuously variable transmission (CVT), wherein the CVT is used to transmit power from the flywheel to the water pump assembly; and the control mechanism is used to adjust the transmission ratio of the CVT according to the rotational speed of the flywheel to control the safe operation of the water pump assembly.

2. The high-efficiency photovoltaic water pump as described in claim 1, characterized in that, The clutch includes a turntable, a locking block, a first spring, and a friction pad. The turntable is connected to the electric motor and has a radially extending mounting groove with an outward opening. The locking block and the first spring are both located in the mounting groove, and the two ends of the first spring are respectively connected to the locking block and the turntable. The friction pad is disposed on the side wall of the mounting groove and is used to increase the friction between the locking block and the side wall of the mounting groove. The flywheel has a receiving groove for fitting onto the outside of the turntable, and the side wall of the receiving groove has a locking groove that mates with the locking block.

3. The high-efficiency photovoltaic water pump as described in claim 1, characterized in that, The continuously variable transmission includes a mounting bracket, a conveyor belt, a sliding component, and two oppositely inverted conical pulleys with parallel axes; The conical wheel is rotatably connected to the mounting bracket, and the bottom area of ​​the conical wheel is larger than the top area; wherein the conical wheel with its bottom surface facing the flywheel is called conical wheel a, and the other conical wheel is called conical wheel b. The conical wheel a is axially connected to a driven gear, and the flywheel is axially connected to a driving gear that meshes with the driven gear. The conveyor belt passes through the sliding member and is sleeved on the outside of the two conical wheels. In the initial state, the radius of the contact area between the conical wheel a and the conveyor belt is greater than the radius of the contact area between the conical wheel b and the conveyor belt. The sliding member is slidably connected to the mounting frame, and the sliding member can drive the conveyor belt to move along the axial direction of the conical wheel; The control mechanism is used to drive the sliding component to move according to the rotational speed of the flywheel.

4. The high-efficiency photovoltaic water pump as described in claim 3, characterized in that, The control mechanism includes a wedge block, a second spring, a conical disc, a third spring, and a connecting rod; The wedge block is slidably disposed on the flywheel along the radial direction of the flywheel, and the two ends of the second spring are respectively connected to the wedge block and the flywheel; The conical disc is sleeved on the outside of the flywheel and axially connected to the connecting rod. When the wedge block moves radially, it abuts against the conical surface of the conical disc, causing the conical disc to move axially. The connecting rod passes through the mounting bracket and is connected to the sliding member. The third spring is sleeved on the outside of the connecting rod, and the two ends of the third spring are respectively connected to the conical disc and the mounting bracket.

5. The high-efficiency photovoltaic water pump as described in claim 4, characterized in that, The sliding component includes a bracket and a first stop; the bracket is slidably disposed on the mounting frame and connected to the connecting rod; the first stop is fixed on the bracket, and there are at least two first stops located on both sides of the conveyor belt along its length, and the first stops are used to drive the conveyor belt to move axially along the conical wheel.

6. The high-efficiency photovoltaic water pump as described in claim 5, characterized in that, The sliding member further includes a first tensioning roller for tensioning the conveyor belt; the conveyor belt surrounds the outside of the connecting rod; the first tensioning roller is located between the two first stops and is rotatably connected to the first stops, and the connecting rod, the first stops and the first tensioning roller surround to form a first limiting cavity for restricting the conveyor belt.

7. The high-efficiency photovoltaic water pump as described in claim 6, characterized in that, The sliding component further includes a fourth spring, a lifting platform, and a second tensioning roller; the lifting platform is slidably mounted on the bracket; the two ends of the fourth spring are respectively connected to the bracket and the lifting platform; the second tensioning roller is rotatably connected to the lifting platform and is used to tension the conveyor belt.

8. The high-efficiency photovoltaic water pump as described in claim 7, characterized in that, The lifting platform includes a connected mounting plate and two second stops; the mounting plate is slidably mounted on the bracket, and the two ends of the fourth spring are respectively connected to the bracket and the mounting plate; the second tension roller is located between the two second stops and is rotatably connected to the second stops, and the connecting rod, the second stops and the second tension roller surround to form a second limiting cavity for limiting the conveyor belt.

9. The high-efficiency photovoltaic water pump as described in claim 3, characterized in that, It also includes multiple elastic telescopic components; the mounting bracket is provided with multiple connecting grooves, one end of the elastic telescopic component is connected to the bottom of the connecting groove, and the other end of the elastic telescopic component extends out of the connecting groove and is hemispherical; the sliding component is provided with multiple limiting grooves that cooperate with the elastic telescopic component.

10. The high-efficiency photovoltaic water pump as described in claim 3, characterized in that, The contact surfaces of the mounting bracket and the sliding component are both provided with damping pads, and friction exists when the two damping pads slide relative to each other.

Images