Energy-saving gear pump

Abstract

The application belongs to the technical field of power equipment, and particularly relates to an energy-saving gear pump, which comprises a shell, an upper cavity and a lower cavity which are isolated from each other and are arranged along an axial direction of the shell, a fixed shaft is arranged in the upper cavity, a vane wheel is rotatably sleeved on the outer periphery of the fixed shaft, a first magnetic member is arranged at the bottom of the vane wheel, an inlet and an outlet are arranged on the shell and are communicated with the upper cavity; a gear set is arranged in the lower cavity, a second magnetic member is arranged on the gear set, the first magnetic member and the second magnetic member are arranged in correspondence in the vertical direction and form a magnetic coupling, an input and an output are arranged on the shell and are communicated with the lower cavity. Only a single fluid power input is needed to synchronously drive the vane wheel and the gear set, an additional pump body is not needed, the use cost is saved, the overall energy consumption is reduced, and the operation noise generated by parallel connection of multiple pump bodies and mechanical contact transmission is also reduced.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, and in particular relates to an energy-saving gear pump. Background Technology

[0002] A pump is a machine that transports or pressurizes fluids. It is mainly used to transport water, oil, slurry, acid and alkali solutions, emulsions, suspensions, gas mixtures, and liquid metals. The most common type of pump is the power pump, which uses the output shaft of a motor to extend into the pump chamber and connect to an impeller to drive its rotation. The centrifugal force generated by the impeller rotation is used to transport the fluid.

[0003] Chinese patent document CN222717127U discloses an impeller assembly and an electronic liquid pump using the same, comprising an impeller assembly and a motor unit connected to the impeller assembly; the motor unit includes at least a motor housing integrally formed with a base, and an output shaft with one end extending outside the motor housing; one end of the output shaft is adapted to pass through the lower housing, the impeller base plate, and the impeller disk and then be inserted into the impeller cover plate. After liquid enters the impeller assembly from the inlet, it is discharged from the outlet through the flow channel of the receiving cavity under the drive of the high-speed rotation of the impeller disk.

[0004] As can be seen from the technical solutions in the aforementioned patent documents, the liquid pump has a single liquid delivery chamber with a fixed internal volume, resulting in a limited fluid volume that a single pump can deliver per unit time. To meet the demand for delivering a larger fluid volume per unit time, a common approach is to increase the number of pumps and operate multiple pumps in parallel. However, while this approach can increase the total fluid delivery capacity, it also increases equipment operating costs, energy consumption, and floor space, and the simultaneous operation of multiple pumps leads to noise aggregation. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving gear pump that solves the problem that the parallel operation of multiple pumps increases the fluid transport volume, leading to increased equipment operating costs and energy consumption.

[0006] To achieve the above objectives, an energy-saving gear pump is provided in this embodiment of the invention, comprising a housing, wherein the housing has an upper cavity and a lower cavity isolated from each other along the axial direction, a fixed shaft is provided in the upper cavity, an impeller is rotatably sleeved on the outer circumference of the fixed shaft, a first magnetic element is provided at the bottom of the impeller, and the housing has an inlet and an outlet communicating with the upper cavity; a gear set is provided in the lower cavity, a second magnetic element is provided on the gear set, the first magnetic element and the second magnetic element are correspondingly arranged in the vertical direction and form magnetic coupling, and the housing has an inlet and an outlet communicating with the lower cavity.

[0007] Furthermore, a first bearing is provided between the fixed shaft and the impeller, and the impeller is rotatably connected to the fixed shaft through the first bearing, so that the impeller and the fixed shaft form a non-contact rotatable connection.

[0008] Furthermore, the impeller has a through-groove groove at its center, the first bearing is fixedly installed in the groove, the bottom surface of the upper cavity has a first positioning hole for installing the bottom of the fixed shaft, and the top surface of the upper cavity has a second positioning hole for installing the top of the fixed shaft.

[0009] Furthermore, the bottom surface of the upper cavity extends upward to form a first extension portion, which extends into the limiting groove. The outer diameter of the first extension portion is smaller than the inner diameter of the limiting groove, and the first positioning hole is provided on the first extension portion. The top surface of the upper cavity extends downward to form a second extension portion, which extends into the limiting groove. The outer diameter of the second extension portion is smaller than the inner diameter of the limiting groove, and the second positioning hole is provided on the second extension portion.

[0010] Furthermore, the gear set includes a driving gear and at least one driven gear, the driving gear meshing with the driven gear, the lower cavity is provided with parallel fixed rods and a spindle corresponding to the number of driven gears; the driving gear is rotatably sleeved on the outer periphery of the fixed rod, and its top is provided with a mounting part, the second magnetic element is disposed on the mounting part; each driven gear is rotatably sleeved on the outer periphery of the corresponding spindle.

[0011] Furthermore, a second bearing is fitted around the outer periphery of the fixed rod, and the driving gear is rotatably connected to the fixed rod through the second bearing; a third bearing is fitted around the outer periphery of the mandrel, and the driven gear is rotatably connected to the mandrel through the third bearing.

[0012] Furthermore, the housing includes a cover plate, a connecting seat, and a base. The cover plate is detachably and sealingly fitted onto the top surface of the connecting seat, and together with the connecting seat, forms the upper cavity. The connecting seat is detachably and sealingly fitted onto the top surface of the base, and together with the base, forms the lower cavity. The inlet and outlet are located on the connecting seat, and the input port and output port are located on the base.

[0013] Furthermore, the top surface of the connecting seat is recessed downward to form a first annular groove, and a first sealing ring is provided in the first annular groove; the top surface of the base is recessed downward to form a second annular groove, and a second sealing ring is provided in the second annular groove.

[0014] Furthermore, the bottom surface of the cover plate is recessed upward to form a third annular groove, and the top surface of the connecting seat is provided with a first protrusion extending into the third annular groove; the bottom surface of the connecting seat is recessed to form a fourth annular groove, and the top surface of the base is provided with a second protrusion extending into the fourth annular groove.

[0015] Furthermore, the blades of the impeller and / or the teeth of the gear set are all inclined.

[0016] The energy-saving gear pump provided in this embodiment of the invention has at least the following technical effects: Fluid with a certain flow rate continuously enters the upper cavity through the inlet, driving the impeller and the first magnetic component to rotate. The first magnetic component drives the second magnetic component in the lower cavity to rotate synchronously through a magnetic field without contact, which in turn drives the gear set to rotate, thereby creating a negative pressure in the lower cavity. This allows the external medium to be drawn in through the inlet and discharged through the outlet. The magnetic coupling transmission mechanism of the first and second magnetic components ensures that the impeller and gear set operate synchronously, enabling the upper and lower cavities to complete the conveying operation simultaneously, significantly increasing the overall fluid conveying volume per unit time.

[0017] With only a single fluid power input, the impeller and gear set can be driven synchronously without the need for an additional pump body with a motor, saving operating costs, reducing overall energy consumption, and also reducing operating noise caused by multiple pump bodies operating in parallel and through mechanical contact transmission.

[0018] The upper and lower chambers are isolated and independent of each other, with no mechanical shafts running through them. Torque is transmitted solely through a magnetic field, eliminating the risk of leakage at the output shaft seal of traditional pumps and reducing mechanical wear. Therefore, the two chambers can also transport fluids of different properties separately, avoiding cross-contamination between different fluids and making the energy-saving gear pump highly compatible with a wide range of applications. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an energy-saving gear pump provided in an embodiment of the present invention.

[0021] Figure 2 Another structural diagram of the energy-saving gear pump provided in an embodiment of the present invention.

[0022] Figure 3This is a structural diagram showing that the inlet and outlet of the energy-saving gear pump provided in an embodiment of the present invention are on the same side.

[0023] Figure 4 This is a cross-sectional view of an energy-saving gear pump provided in an embodiment of the present invention.

[0024] Figure 5 An exploded view of the energy-saving gear pump provided in an embodiment of the present invention.

[0025] Figure 6 This is a structural diagram of the cover plate of the energy-saving gear pump provided in an embodiment of the present invention.

[0026] Figure 7 This is a structural diagram of the connecting seat of the energy-saving gear pump provided in an embodiment of the present invention.

[0027] Figure 8 Another structural diagram of the connecting seat of the energy-saving gear pump provided in an embodiment of the present invention.

[0028] Figure 9 The diagram shows the structure of the impeller of the energy-saving gear pump provided in an embodiment of the present invention.

[0029] Figure 10 An exploded view of the impeller of an energy-saving gear pump provided in an embodiment of the present invention.

[0030] Figure 11 The diagram shows the structure of the drive gear of the energy-saving gear pump provided in an embodiment of the present invention.

[0031] Figure 12 An exploded view of the drive gear of the energy-saving gear pump provided in an embodiment of the present invention.

[0032] Figure 13 The diagram shows the structure of the driven gear of the energy-saving gear pump provided in the embodiment of the present invention.

[0033] In the diagram, 100 is the housing, 110 is the upper cavity, 111 is the first extension, 112 is the first positioning hole, 113 is the second extension, 114 is the second positioning hole, 120 is the lower cavity, 130 is the inlet, 131 is the outlet, 140 is the input port, 141 is the output port, 150 is the cover plate, 151 is the third annular groove, 160 is the connecting seat, 161 is the first annular groove, 162 is the first sealing ring, 163 is the fourth annular groove, 164 is the upper recess, 165 is the first boss, 170 is the base, 171 is the second annular groove, 172 is the second sealing ring, 173 is the second boss, and 174 is the lower recess. 200, Impeller; 210, Fixed shaft; 220, First magnetic component; 230, First bearing; 231, Limiting groove; 240, Limiting slot; 241, Limiting part; 250, Blade; 260, Upper disc; 270, Lower disc; 271, First mounting slot; 272, First sealing plate. 300. Gear set; 310. Drive gear; 311. Mounting part; 312. Second mounting groove; 313. Second sealing plate; 314. Gear tooth; 320. Driven gear; 321. Flange; 330. Second magnetic component; 340. Fixing rod; 350. Mandrel; 360. Second bearing; 370. Third bearing. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and 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 present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0038] In one embodiment of the energy-saving gear pump of the present invention, please refer to... Figures 1 to 4 An energy-saving gear pump includes a housing 100, which has an upper cavity 110 and a lower cavity 120 isolated from each other along the axial direction. A fixed shaft 210 is provided in the upper cavity 110, and an impeller 200 is rotatably sleeved on the outer circumference of the fixed shaft 210. A first magnetic element 220 is provided at the bottom of the impeller 200. The housing 100 has an inlet 130 and an outlet 131 communicating with the upper cavity 110. A gear set 300 is provided in the lower cavity 120, and a second magnetic element 330 is provided on the gear set 300. The first magnetic element 220 and the second magnetic element 330 are correspondingly arranged in the vertical direction and form magnetic coupling. The housing 100 has an inlet 140 and an outlet 141 communicating with the lower cavity 120.

[0039] Specifically, fluid with a certain flow rate continuously enters the upper cavity 110 through the inlet 130 and exits through the outlet 131. The fixed shaft 210 remains stationary, while the fluid drives the impeller 200 and the first magnetic component 220 to rotate around the fixed shaft 210. The first magnetic component 220 drives the second magnetic component 330 in the lower cavity 120 to rotate synchronously via a magnetic field, thereby driving the gear set 300 to rotate. This creates a negative pressure in the lower cavity 120, allowing external media to be drawn in through the inlet 140 and discharged through the outlet 141. The magnetic coupling transmission mechanism of the first magnetic component 220 and the second magnetic component 330 ensures that the impeller 200 and the gear set 300 operate synchronously, enabling the upper and lower cavities to simultaneously complete fluid transport operations, significantly increasing the overall fluid transport volume per unit time.

[0040] The upper chamber 110 and lower chamber 120 are isolated and independent of each other, with no mechanical shaft running through them. Torque is transmitted solely through a magnetic field, eliminating the risk of leakage at the output shaft seal of traditional pumps, reducing mechanical wear, and improving the safety and reliability of the gear pump. Therefore, the two chambers can also transport fluids of different properties separately, avoiding cross-contamination between different fluids. The lower chamber 120 and gear set 300 are made of corrosion-resistant materials, allowing for the safe transport of corrosive media. This avoids the risk of core transmission components being corroded due to corrosive media seeping into the mechanical connection of the output shaft, as is common in traditional pumps. This saves on later maintenance and replacement costs, making the energy-saving gear pump more fluid-compatible and applicable to a wider range of fields.

[0041] With only a single fluid power input, the impeller 200 and gear set 300 can be driven synchronously without the need for an additional pump body with a motor, saving operating costs, reducing overall energy consumption, and also reducing vibration and operating noise caused by multiple pump bodies operating in parallel and through mechanical contact transmission.

[0042] The fluid power source includes, but is not limited to, tap water and fluid output from a liquid pump. The fluid output from the liquid pump can be further divided into multiple branches via a distribution pipe. These branches are connected to the inlets 130 of multiple energy-saving gear pumps, synchronously driving the gear sets 300 within the lower chambers of these pumps to transport fluids of different properties. This single fluid power source drives multiple energy-saving gear pumps to operate synchronously, improving transport efficiency and layout flexibility.

[0043] Please refer to Figure 1 , Figure 3 and Figure 7 The housing 100 includes a cover plate 150, a connecting seat 160, and a base 170. The connecting seat 160 has an upper recessed cavity 164 with an opening on its top surface. The cover plate 150 is detachably sealed to the top surface of the connecting seat 160 and together with the upper recessed cavity 164, forms an upper cavity 110. The base 170 has a lower recessed cavity 174 with an opening on its top surface. The bottom surface of the connecting seat 160 is detachably sealed to the top surface of the base 170 and together with the lower recessed cavity 174, forms a lower cavity 120. The inlet 130 and the outlet 131 can be located on the same side, adjacent side, or opposite side of the connecting seat 160. The input port 140 and the output port 141 are located on the base 170 and are respectively located on both sides of the meshing point of the gear set 300. The inlet 130, outlet 131, input 140, and output 141 are each equipped with a connecting pipe extending out of the outer periphery of the housing 100. The outer surface of this connecting pipe is threaded, which facilitates connection with external pipes via threaded fastening. The overall structure of the housing 100 is simple. The cover plate 150, connecting seat 160, and base 170 are fastened together by bolts, which facilitates installation, disassembly, and maintenance, further reducing the cost of use.

[0044] Alternatively, please refer to Figures 4 to 8 A first annular groove 161 is formed by a downward recess on the top surface of the connecting seat 160 surrounding the outer periphery of the upper recess 164. A first sealing ring 162 is fixedly engaged within the first annular groove 161. When the cover plate 150 covers the top surface of the connecting seat 160, it limits the position of the first sealing ring 162, thereby sealing the gap between the cover plate 150 and the connecting seat 160 and preventing fluid leakage in the upper cavity 110. A second annular groove 171 is formed by a downward recess on the top surface of the base 170 surrounding the outer periphery of the lower recess 174. A second sealing ring 172 is fixedly engaged within the second annular groove 171. When the entire bottom surface of the connecting seat 160 covers the top surface of the base 170, it limits the position of the second sealing ring 172, thereby sealing the gap between the connecting seat 160 and the base 170 and preventing fluid leakage in the lower cavity 120. This improves the safety of the energy-saving gear pump.

[0045] For further details, please refer to... Figure 5 and Figure 8The top surface of the connecting seat 160 has an upwardly extending annular first boss 165 between the first annular groove and the upper recessed cavity. The bottom surface of the cover plate 150 is recessed upward to form a third annular groove 151, and the first boss 165 is inserted into the third annular groove 151 for a tight fit. The top surface of the base 170 has an upwardly extending second boss 173 between the second annular groove 171 and the lower recessed cavity 174. The bottom surface of the connecting seat 160 has a fourth annular groove 163 for the second boss 173 to be inserted into, and the boss 173 and the fourth annular groove 163 are inserted into each other for a tight fit. The misalignment of the first boss 165 with the third annular groove 151 and the misalignment of the second annular groove 171 with the boss 173 respectively extends the connection gap path between the cover plate 150 and the connecting seat 160, and between the base 170 and the connecting seat 160, thereby enhancing the sealing reliability of the connection between the cover plate 150 and the connecting seat 160, and between the base 170 and the connecting seat 160, and thus enhancing the overall sealing performance of the housing.

[0046] In addition, the volume inside the lower cavity 120 is larger than the volume inside the upper cavity 110, which further increases the total amount of fluid transported by the shell 100 per unit time.

[0047] Please refer to Figure 4 , Figure 5 A first bearing 230 is provided between the fixed shaft 210 and the impeller 200. The impeller 200 is rotatably connected to the fixed shaft 210 through the first bearing 230, forming a non-contact rotatable connection between the impeller 200 and the fixed shaft 210. Specifically, the inner hole of the first bearing 230 is rotatably connected to the fixed shaft 210, and the inner ring of the impeller 200 is interference-fitted with the outer circumference of the first bearing 230. When the fluid drives the impeller 200 to rotate, the impeller 200 rotates stably at high speed around the fixed shaft 210 through the first bearing 230. This bearing structure effectively reduces friction and noise during operation, and physically isolates the impeller 200 from the fixed shaft 210, eliminating direct contact and reducing friction and wear between them. This results in low-friction operation of the impeller 230 and extends its service life.

[0048] Alternatively, please refer to Figures 4 to 7The bottom surface of the cover plate 150 extends downward around the outer periphery of the fixed shaft 210 to form a second extension 113. The second extension 113 has a second positioning hole 114 for mounting and limiting the top of the fixed shaft 210. The bottom surface of the upper cavity 164 of the connecting seat 160 extends upward around the outer periphery of the fixed shaft 210 to form a first extension 111. The first extension 111 has a first positioning hole 112 for mounting and limiting the bottom of the fixed shaft 210. The second positioning hole 114 and the first positioning hole 112 are coaxially arranged, and their upper and lower cooperation achieves axial fixation of the fixed shaft 210. The first positioning hole 112 can be an arc-shaped groove, a D-shaped groove, a capsule-shaped groove, a square groove, or a dovetail-shaped groove, etc. The second positioning hole 114 can be a circular concave hole, or adopt one of the same shapes as the first positioning hole 112. The shapes of both ends of the fixed shaft 210 are adapted to the shapes of the second positioning hole 114 and the first positioning hole 112 to achieve radial positioning of the fixed shaft 210, prevent the fixed shaft 210 from rotating due to the rotation of the impeller 200, and thus ensure the stability of the rotation of the impeller 200.

[0049] Please refer to Figure 4 , Figure 5 and Figure 9 The impeller 200 has a circular limiting groove 240 that runs vertically through the center. A limiting part 241 is provided below the limiting groove 240. The shape of the limiting part 241 can be an arc groove, a D-shaped groove, a capsule-shaped groove, etc. The lower shape of the outer periphery of the first bearing 230 is adapted to the shape of the limiting part 241, and the upper shape is adapted to the shape of the limiting groove 240.

[0050] Preferably, limiting protrusions 241 extend inward from opposite sides below the limiting groove 240, and limiting grooves 231 corresponding to the limiting protrusions 241 are provided at corresponding positions on the outer periphery of the first bearing 230. The first bearing 230 is assembled into the limiting groove 240 by a riveting process, so that the limiting protrusions 241 support and limit the first bearing 230, realizing radial limiting and fixed connection between the outer periphery of the first bearing 230 and the impeller 200, and preventing the impeller 200 and the outer periphery of the first bearing 230 from rotating relative to each other.

[0051] Please refer to Figure 4 The second extension 113 and the first extension 111 extend into the limiting groove 240 from the upper and lower ends, respectively, and the outer diameters of the second extension 113 and the first extension 111 are both smaller than the inner diameter of the limiting groove 240. This creates a circumferential gap between the impeller 200 and the two extensions, preventing friction between the impeller 200 and the outer wall of the extensions when the impeller 200 rotates. It also achieves a compact layout of the impeller 200 within the upper cavity 110, thereby reducing the overall height of the upper cavity 110.

[0052] Please refer to Figure 4Furthermore, when the first extension 111 extends into the limiting groove 240 to support the bottom surface of the first bearing 230, there is an axial distance between the impeller 200 and the bottom surface of the upper cavity 110. At this time, the axial distance between the impeller 200 and the top surface of the upper cavity 110 is greater than the axial distance between the first bearing 230 and the second extension 113. Therefore, when the fluid drives the impeller 200 and the first bearing 230 to rotate at high speed, if the first bearing 230 undergoes axial displacement along the fixed shaft 210, the second extension 113 first abuts against the top surface of the first bearing 230, thereby preventing the impeller 200 from continuing to move upward and avoiding contact between the impeller 200 and the top surface of the upper cavity 110, which would cause wear on the housing 100. In addition, the cover plate 150 and the connecting seat 160 can be made of wear-resistant materials, which reduces the wear of the extensions even if the first bearing 230 contacts the second extension 113 or the first extension 111 respectively, further extending the service life of the pump body.

[0053] Please refer to Figure 4 , Figure 5 The gear set 300 includes a driving gear 310 and at least one driven gear 320. The driving gear 310 and the driven gear 320 are meshed and connected. The lower cavity 120 is provided with mutually fixed rods 340 and spindles 350 corresponding to the number of driven gears 320. Each driven gear 320 is rotatably fitted around the outer circumference of its corresponding spindle 350. When there is one driven gear 320, there is one spindle 350, and the driven gear 320 meshes with one side of the driving gear 310. When there are two driven gears 320, there are two spindles 350, and the two driven gears 320 can mesh with opposite sides of the driving gear 310, or one driven gear 320 can directly mesh with the driving gear 310, and this driven gear 320 and the other driven gear 320 are meshed together. When there are more than two driven gears 320, the number of spindles 350 is the same as the number of driven gears 320, one driven gear 320 meshes with the driving gear 310, and the remaining driven gears 320 mesh with the adjacent driven gears 320 in sequence.

[0054] The drive gear 310 is rotatably sleeved on the outer periphery of the fixed rod 340. A mounting portion 311 is provided on the top of the drive gear 310, and the second magnetic component 330 is mounted on the mounting portion 311. The fixed rod 340 is coaxially arranged with the fixed shaft 210, and the drive gear 310 is located directly below the impeller 200. This ensures that the first magnetic component 220 and the second magnetic component 330 are precisely aligned in the vertical direction and rotate around the same axis, improving the reliability of the magnetic field transmission and preventing eccentric rotation of the drive gear 310 from affecting the smoothness of the transmission.

[0055] Preferably, there is one driven gear 320. During operation, the impeller 200 rotates, driving the first magnetic element 220 to rotate. Through magnetic coupling, the second magnetic element 330 rotates synchronously, thereby driving the driving gear 310 and its meshing driven gear 320 to rotate together. The driving gear 310 and the driven gear 320 rotate synchronously within the lower cavity 120, thereby generating a negative pressure within the lower cavity 120. This draws in external media from the inlet 140, and after being pushed by the two gears, it is discharged from the outlet 141.

[0056] Please refer to Figure 9 and Figure 10 The impeller 200 includes a lower circular plate 270 and multiple blades 250. A cylindrical body is located at the center of the lower circular plate 270, and a through-hole limiting groove 240 is located at the center of both the cylindrical body and the lower circular plate 270. The multiple blades 250 are arranged in a circumferential array along the outer periphery of the cylindrical body, and their bottom ends are connected to the lower circular plate 270, with the blades 250 being inclined. Multiple upwardly recessed first mounting grooves 271 are evenly distributed around the bottom of the lower circular plate 270 along its central axis. A first magnetic component 220 is fixedly installed in each first mounting groove 271. A first sealing plate 271 is fixed to the bottom opening of the first mounting groove 271 by welding or riveting to close the opening of the first mounting groove 271 and protect the first magnetic component 220. Preferably, there are six first magnetic components 220.

[0057] Preferably, the top of the cylinder is also provided with an upper circular plate 260, and the top of the blade 250 is connected to the upper circular plate 260. The setting of the upper circular plate 260 enhances the overall strength and rigidity of the impeller 200, reduces vibration and deformation during high-speed rotation, and improves conveying efficiency and operational stability.

[0058] Please refer to Figure 11 and Figure 12 The mounting portion 311 of the drive gear is a ring structure corresponding to the lower circular piece 270. Multiple downwardly recessed second mounting grooves 312 are evenly distributed around the top of the ring 311 along its central axis. A second magnetic component 330 is fixedly installed within each second mounting groove 312. A second sealing plate 313 is fixed to the opening at the top of the second mounting groove 312 by welding or riveting to close the opening and protect the second magnetic component 330. The drive gear 310 has multiple teeth 314 circumferentially arranged below the ring. The mounting portion 311 forms a foolproof structure, and the coaxial design eliminates the need for separate alignment of the magnetic component during assembly, improving assembly efficiency.

[0059] Preferably, the lower disc 270 and the ring 311 have the same diameter, their orthographic projections coincide, and the positions and dimensions of the first mounting groove 271 and the second mounting groove 312 correspond, ensuring stable magnetic coupling between the first magnetic component 220 and the second magnetic component 330, further guaranteeing the smooth rotation of the drive gear 310. The teeth of the driven gear 320 mesh with the teeth of the drive gear 310 and are located below the ring 311, making the volume of the lower cavity 120 approximately twice that of the upper cavity 110, increasing the overall fluid transport volume of the gear pump per unit time to 2.8-3 times that of a single-cavity impeller structure.

[0060] Optionally, the bottom of the lower circular piece 270 and the top of the circular ring 311 are respectively provided with a first mounting groove 271 and a second mounting groove 312 in an annular shape. The first mounting groove 271 and the second mounting groove 312 are respectively provided in the vertical direction.

[0061] Please refer to Figure 10 , Figure 12 Furthermore, the impeller blades 250 and the teeth 314 of the driving and driven gears are all inclined. Based on the principles of fluid dynamics, the shape and inclination angle of the blades 250 and the teeth 314 can be rationally designed to give them a certain curvature, so that the impeller 200, driving gear 310 and driven gear 320 are more in line with the fluid flow characteristics during operation, effectively reducing the fluid transport resistance, improving the transport efficiency and reducing energy loss.

[0062] Please refer to Figure 4 and Figure 5 A second bearing 360 is fitted around the outer periphery of the fixed rod 340. The driving gear 310 is rotatably connected to the fixed rod 340 via the second bearing 360. The inner hole of the second bearing 360 is rotatably connected to the outer periphery of the fixed rod 340. The inner ring of the driving gear 310, which passes through the center, is interference-fitted with the outer periphery of the second bearing 360, thus forming a non-contact rotational connection between the driving gear 310 and the fixed rod 340. A third bearing 370 is fitted around the outer periphery of the spindle 350. The driven gear 320 is rotatably connected to the spindle 350 via the third bearing 370. The inner hole of the third bearing 370 is rotatably connected to the outer periphery of the spindle 350. The inner ring of the driven gear 320, which passes through the center, is interference-fitted with the outer periphery of the third bearing 370, thus forming a non-contact rotational connection between the driven gear 320 and the spindle 350. Specifically, the bearing structure effectively reduces friction between the driving gear 310 and the driven gear 320 and their corresponding spindles during rotation, thereby reducing noise and wear, achieving low-resistance and smooth operation of the driving gear 310 and the driven gear 320, and extending their service life.

[0063] The fixing method of the fixing rod 340, the spindle 350 and the lower cavity 120 is the same as that of the fixing shaft 210 in the upper cavity 110, so that the fixing rod 340 and the spindle 350 are fixed in the lower cavity to avoid radial and axial displacement. The fastening connection method between the driving gear 310 and the driven gear 320 and the second bearing 360 and the third bearing 370 respectively is the same as that between the impeller 200 and the first bearing 230, so as to achieve a compact layout design of the gear set 300 in the lower cavity 120 and reduce the overall height of the lower cavity 120.

[0064] Please refer to Figure 4 , Figure 13 Furthermore, an annular flange 321 extends upward from the top surface of the driven gear 320 around its inner ring. The inner ring of the annular flange 321 is connected to the inner ring of the driven gear 320, which increases the mating area between the third bearing 370 and the driven gear 320, thereby improving the installation stability of the third bearing 350 within the driven gear 320. The top surface of the third bearing 370 extends beyond the top surface of the annular flange 321. When the gear set 300 is conveying fluid, if the driven gear 320 tends to move upward along the spindle 350, the third bearing 370 first abuts against the bottom surface of the connecting seat 160, effectively preventing the driven gear 320 from continuing to move upward and avoiding direct contact between the driven gear 320 and the connecting seat 160, thus preventing wear on the housing. In addition, the annular flange 321 also constitutes a foolproof structure, facilitating the rapid identification and positioning of the driven gear 320 during assembly, which helps improve assembly efficiency.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving gear pump, characterized in that, The device includes a housing, which has an upper cavity and a lower cavity separated from each other along an axial direction. A fixed shaft is provided in the upper cavity, and an impeller is rotatably fitted around the fixed shaft. A first magnetic element is provided at the bottom of the impeller. The housing has an inlet and an outlet communicating with the upper cavity. A gear set is provided in the lower cavity, and a second magnetic element is provided on the gear set. The first magnetic element and the second magnetic element are correspondingly arranged in the vertical direction and form magnetic coupling. The housing has an input port and an output port communicating with the lower cavity. A fluid with a certain flow rate continuously enters the upper cavity from the inlet, driving the impeller and the first magnetic component to rotate. The first magnetic component drives the second magnetic component in the lower cavity to rotate synchronously through the magnetic field without contact, thereby driving the gear set to rotate, so that the upper and lower cavities can complete the conveying operation at the same time.

2. The energy-saving gear pump according to claim 1, characterized in that: A first bearing is provided between the fixed shaft and the impeller, and the impeller is rotatably connected to the fixed shaft through the first bearing, so that the impeller and the fixed shaft form a non-contact rotatable connection.

3. The energy-saving gear pump according to claim 2, characterized in that: The impeller has a through-groove groove at its center, the first bearing is fixedly installed in the groove, the bottom surface of the upper cavity has a first positioning hole for installing the bottom of the fixed shaft, and the top surface of the upper cavity has a second positioning hole for installing the top of the fixed shaft.

4. The energy-saving gear pump according to claim 3, characterized in that: The bottom surface of the upper cavity extends upward to form a first extension, which extends into the limiting groove. The outer diameter of the first extension is smaller than the inner diameter of the limiting groove, and the first positioning hole is provided on the first extension. The top surface of the upper cavity extends downward to form a second extension, which extends into the limiting groove. The outer diameter of the second extension is smaller than the inner diameter of the limiting groove, and the second positioning hole is provided on the second extension.

5. The energy-saving gear pump according to claim 1, characterized in that: The gear set includes a driving gear and at least one driven gear. The driving gear meshes with the driven gear. The lower cavity is provided with parallel fixed rods and a spindle corresponding to the number of driven gears. The driving gear is rotatably sleeved on the outer periphery of the fixed rod, and its top is provided with a mounting part. The second magnetic component is disposed on the mounting part. Each driven gear is rotatably sleeved on the outer periphery of the corresponding spindle.

6. The energy-saving gear pump according to claim 5, characterized in that: A second bearing is fitted around the outer periphery of the fixed rod, and the driving gear is rotatably connected to the fixed rod through the second bearing; a third bearing is fitted around the outer periphery of the spindle, and the driven gear is rotatably connected to the spindle through the third bearing.

7. The energy-saving gear pump according to claim 1, characterized in that: The housing includes a cover plate, a connecting seat, and a base. The cover plate is detachably and sealingly fitted onto the top surface of the connecting seat, and together with the connecting seat, forms the upper cavity. The connecting seat is detachably and sealingly fitted onto the top surface of the base, and together with the base, forms the lower cavity. The inlet and outlet are located on the connecting seat, and the input port and output port are located on the base.

8. The energy-saving gear pump according to claim 7, characterized in that: The top surface of the connecting seat is recessed downward to form a first annular groove, and a first sealing ring is provided in the first annular groove; the top surface of the base is recessed downward to form a second annular groove, and a second sealing ring is provided in the second annular groove.

9. The energy-saving gear pump according to claim 8, characterized in that: The bottom surface of the cover plate is recessed upward to form a third annular groove, and the top surface of the connecting seat is provided with a first protrusion extending into the third annular groove; the bottom surface of the connecting seat is recessed to form a fourth annular groove, and the top surface of the base is provided with a second protrusion extending into the fourth annular groove.

10. The energy-saving gear pump according to claim 1, characterized in that: The blades of the impeller and / or the teeth of the gear set are inclined.

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