阅读说明：本技术 电芯泵 (Battery cell pump ) 是由 曾喜平 王清纯 李德英 王蔚峰 于 2020-06-09 设计创作，主要内容包括：本发明公开了一种电芯泵。电芯泵的泵芯安装在原动机管轴内,使泵与原动机融为一体；原动机管轴旋转机械能直接传递给了流体,无中间传递环节。电芯泵泵芯的外部是圆管、内部是泵叶、中心是细杆；泵叶是沿外部圆管和中心细杆均匀分布的三条或多条连续等节距的螺旋叶片,其螺旋升角为45±15°；泵叶外轮廓为梭形(枣核形),即中间为圆柱型、两端为圆锥形。电芯泵流体进口处有导流器,流体出口处有整流器。电芯泵杜绝了无用功耗,不存在基础能耗,有变废为宝的功能。电芯泵流体输送系统效率可达80％以上,大大降低了流体输送系统能耗,减少了流体输送设备制造成本,节省了流体输送设备安装空间。(The invention discloses a battery cell pump. The pump core of the battery core pump is arranged in the shaft of the prime motor, so that the pump and the prime motor are integrated; the rotating mechanical energy of the tubular shaft of the prime motor is directly transmitted to the fluid without an intermediate transmission link. The outer part of the pump core of the battery cell pump is a circular tube, the inner part of the pump core is a pump blade, and the center of the pump core is a thin rod; the pump blade is three or more continuous spiral blades with equal pitch which are uniformly distributed along the outer circular tube and the central thin rod, and the helix angle of the pump blade is 45 +/-15 degrees; the outer contour of the pump blade is fusiform (jujube core shape), namely the middle is cylindrical and the two ends are conical. A fluid director is arranged at a fluid inlet of the battery cell pump, and a rectifier is arranged at a fluid outlet. The battery cell pump avoids useless power consumption, does not have basic energy consumption, and has the function of changing waste into valuables. The efficiency of the battery cell pump fluid conveying system can reach more than 80%, the energy consumption of the fluid conveying system is greatly reduced, the manufacturing cost of the fluid conveying equipment is reduced, and the installation space of the fluid conveying equipment is saved.)

1. The battery cell pump is characterized in that a pump cell (11) is arranged in a tubular shaft (12) of a prime motor, and the pump and the prime motor are organically fused into a whole; the battery cell pump comprises a fluid director (1), a pump end cover (2), a pump shell (3), a stator (4), a rotor (5), a bearing (6), a rectifier (7), a fixing ring (8), a sealing ring I (9), a sealing ring II (10), a pump core (11) and a pipe shaft (12); the outer part of the pump core (11) is a round pipe, the inner part of the pump core is a pump blade, and the center of the pump core is a thin rod; the pump blades are three or more continuous spiral blades with equal pitch which are uniformly distributed along the outer circular tube and the central thin rod, and the helix angle of the pump blades is 45 +/-15 degrees; the outer contour of the pump blade is fusiform, namely the middle part is cylindrical, and the two ends are conical; the pump core (11) is fixed in the pipe shaft (12) through a fixing ring (8) and rotates together with the pipe shaft (12).

2. The battery core pump according to claim 1, wherein the inside of the fluid director (1) is a tapered hole, that is, the diameter of the hole close to one end of the pump core (11) is small, the diameter of the hole far away from one end of the pump core (11) is large, three or more fluid director spiral blades are uniformly and fixedly distributed along the inner wall of the tapered hole, the contraction angle of the fluid director spiral blades is the same as the angle of the tapered hole of the fluid director (1), the spiral direction of the fluid director spiral blades is the same as that of the pump core (11), and the included angle between the fluid director spiral blades and the central axis is 1/3-1/2 of the; the fluid director (1) is fixed on the pump end cover (2) through a fastening screw and a branch port; an observation window is arranged on the pump body, a pointer is arranged below the center of the observation window, and the running direction of the pump is judged according to the deflection direction of the pointer; the structure principle of the rectifier (7) is the same as that of the fluid director (1).

3. The cell pump according to claim 1, characterized in that the pump end cap (2) is fixed on the pump housing (3) by fastening screws and support openings; the pump shell (3) is a shell of the battery cell pump and plays a role in supporting and protecting each part in the pump; a cable junction box is arranged on the pump shell (3), a binding post is arranged in the junction box, and the binding post is connected with the wires of the windings of each phase of the stator (4); a bearing (6) for supporting the tube shaft (12) and ensuring normal rotation of the tube shaft (12) is fixed and positioned within the pump end cap (2).

4. The cell pump of claim 1, wherein the fluid is prevented from leaking into the stator (4) and the rotor (5), and a seal ring I (9) and a seal ring II (10) which cause an electrical short-circuit fault are installed between the fluid director (1), the rectifier (7) and the tubular shaft (12) to separate the fluid in the pump core (11) from the stator (4) and the rotor (5) of the cell pump.

5. The cell pump according to claim 1, characterized in that the stator (4) generating the rotating magnetic field is fixed in the pump housing (3) and consists of a stator core and a stator winding.

6. The cell pump according to claim 1, wherein the rotor (5) for converting the rotating magnetic field generated by the stator (4) into the rotating mechanical energy of the rotor is fixed on the tubular shaft (12) and is composed of a rotor core and a rotor winding.

7. The cell pump according to claim 1, characterised in that the tubular shaft (12) is hollow, the pump core (11) being mounted in its bore, supported on both sides by bearings (6) on its outer circumference, and its middle section of the outer circumference being fixed to the rotor (5) and rotating with it.

Technical Field

The invention relates to an electric drive pump, belonging to the comprehensive technical field of organic integration of electric drive and fluid machinery.

Background

A pump is a fluid machine for transporting a liquid, which transfers the mechanical energy of a prime mover or the energy of other energy sources to the liquid, so that the energy (potential energy, pressure energy or kinetic energy) of the liquid is increased.

The traditional pump must work together with a prime mover, and the pump and the prime mover are separated and independent; the flow area, the flow direction, the flow speed and the pressure of the fluid in the pump body are always subjected to drastic change, and the fluid in the pump body mainly flows in a turbulent flow or a vortex flow and is basically not laminar flow; the manufacturing process is complex, the volume is large, the cost is high, and the efficiency is low (generally, the efficiency is only 30-60%).

In the existing novel hollow screw pump, a hollow screw blade (or an impeller) is arranged in a motor shaft, on one hand, the flow direction, the flow speed and the pressure of fluid are all suddenly changed at an inlet and an outlet of the pump, and impact and noise are easy to generate; on the other hand, the hollow helical blades (or impellers) are stressed unevenly, so that the service life is short and the efficiency is not high; secondly, the center of the spiral blade (impeller) is hollow, and the fluid can flow back from the center when the rotating speed is too high or too low, so that the internal leakage phenomenon occurs. Therefore, the existing novel hollow screw pump still has the problems of higher cost, higher noise, lower efficiency and the like.

There is a patent (publication No. CN1030967A, application No. 88104722.8) related to a liquid compressor having a cylinder and a rotary rod inside the cylinder. The rotary rod has a spiral groove formed on its outer peripheral surface, and a spiral blade fitted to the spiral groove and dividing a space formed by the inner peripheral surface of the cylinder and the outer peripheral surface of the rotary rod into a plurality of operating chambers, and the volume of the operating chambers gradually decreases as the operating chambers are moved away from one end of the cylinder. Thus, it can be seen that: the pitch of the helical blades of the device is not equidistant and is gradually changed; the volume of each action chamber is gradually changed, namely the volume of the action chamber gradually becomes smaller from the suction side to the discharge side of the cylinder; when the cylinder and the rotary rod rotate relatively, fluid in the cylinder and the rotary rod is gradually compressed by the action chambers to form high-pressure fluid, so that other machines are driven to work. The purpose of this device is to provide a power plant, i.e. a compressor, which is not used for transporting liquids, nor for transporting liquids (low flow rate), so that the basic function of the pump is not available.

The prior patent (publication No. CN103807207A, application No. 201210436592.2) relates to an induction hollow spiral pushing device with a novel structure. The integrated spiral ring is adopted to do work and move in the input port for the pushed object in the hollow rotor of the motor, so that the flow volume of the pushed object is improved, and the stable stroke is ensured. The spiral ring is a hollow shaftless multi-circle multi-ring tubular structure and is directly driven by induction, and the sealed shell is completely isolated from the outside, namely the friction between an isolator and a shaft is eliminated, and the friction between a drive and a rotor is reduced, namely the noise is reduced. The self-induction type self-propelled material pushing device can directly adjust the rotating speed and the forward and reverse rotation capacity of the pushed material environment, and the whole pushing efficiency is higher than that of the existing pump, propeller, fan, spiral air compression equipment and spiral excavating equipment. Thus, it can be seen that: the spiral ring of the device is a hollow shaftless multi-circle multi-ring tubular structure; the spiral ring is hollow and has no shaft, the rotating speed is too high or too low, fluid (pushed objects) can flow back from the center, the internal leakage phenomenon occurs, and the efficiency is obviously reduced; the spiral ring is a multi-circle and multi-ring tubular structure, and the flow direction, flow speed and pressure of input port fluid (pushed object) are different from those in the spiral ring, so that the fluid (pushed object) can generate violent impact on the front ring (a ring close to the input port end) of the spiral ring, and the efficiency of the spiral ring is reduced; the spiral ring is a multi-circle multi-ring tubular structure, and the pressure energy of the fluid (pushed object) at the output port is almost completely provided by the rear ring (a ring close to the output port) of the spiral ring, so the actual stress of the spiral ring is extremely uneven, and the service life is shortened.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a high efficiency pump, i.e., a battery cell pump, to solve the technical problems of improving the efficiency of a fluid delivery system, reducing the energy consumption of the fluid delivery system, reducing the manufacturing cost of fluid delivery equipment, and saving the installation space of the fluid delivery equipment.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

cell pump structure: the battery cell pump comprises a fluid director 1, a pump end cover 2, a pump shell 3, a stator 4, a rotor 5, a bearing 6, a rectifier 7, a fixing ring 8, a sealing ring I9, a sealing ring II 10, a pump core 11, a tubular shaft 12 and the like. The fluid director 1 is fixed on the pump end cover 2 through a fastening screw and a branch port; an observation window is arranged on the pump body, a pointer is arranged below the center of the observation window, and the running direction of the pump is judged according to the deflection direction of the pointer. The pump end cover 2 is fixed on the pump shell 3 through a fastening screw and a branch opening. The pump shell 3 is a shell of the battery cell pump and plays a role in supporting and protecting each part in the pump; the pump shell 3 is provided with a cable junction box, a binding post is arranged in the junction box, and the binding post is connected with wires of each phase winding of the stator 4. The stator 4 is fixed in the pump housing 3, is composed of a stator core and a stator winding, and is used for generating a rotating magnetic field. The rotor 5 is fixed to the pipe shaft 12, and is composed of a rotor core and a rotor winding, and functions to convert a rotating magnetic field generated by the stator 4 into rotating mechanical energy of the rotor. A bearing 6 is fixed and positioned within the pump end cap 2 for supporting the spool 12 to ensure that the spool 12 rotates normally. The rectifier 7 is similar to the deflector 1 in structure. The fixing ring 8 fixes the pump core 11 to the tube shaft 12, and rotates the pump core 11 together with the tube shaft 12. The sealing ring I9 and the sealing ring II 10 are arranged between the fluid director 1, the rectifier 7 and the tubular shaft 12, play a role in sealing protection, separate the fluid in the pump core 11 from the stator 4 and the rotor 5 of the battery cell pump, and prevent the fluid from leaking into the stator 4 and the rotor 5 to cause faults such as electrical short circuit and the like. The pump core 11 is a core component of the electric core pump, and the pump core 11 is used for converting the rotational mechanical energy generated by the rotor 5 into pressure energy (mainly) and kinetic energy of fluid; the outside of the pump core 11 is a circular pipe, the blades of the pump core 11 are helical blades, the outer contour is fusiform (jujube core shape), and the center is provided with a thin rod; the pump core 11 is fixed in the tube shaft 12 by a fixing ring 8 and rotates together with the tube shaft 12. The tubular shaft 12 is hollow, and has a pump core 11 mounted in its inner hole, and its outer circle has two sides supported by bearings 6, and its outer circle has a middle section fixed to the rotor 5 and rotating together with the rotor.

Cell pump theory of operation: when the winding of the stator 4 of the cell pump is electrified, a rotating magnetic field is generated in the inner circle space of the stator 4, the rotating magnetic field cuts the stationary winding conductor of the rotor 5, and induced potential is generated in the winding conductor of the rotor 5. Because the winding conductors of the rotor 5 are shorted by the end rings, current flows through the winding conductors of the rotor 5 under the action of the induced potential. If the phase relationship between the potential and the current is not considered, it can be considered that the direction of the current is the same as the direction of the potential. The current in the winding conductors of the rotor 5 interacts with the rotating magnetic field generated by the stator 4 to generate an electromagnetic force acting on the winding conductors of the rotor 5, which causes the rotor 5 to rotate in the direction of the rotating magnetic field of the stator 4. The rotor 5 and the stator 4 must have relative motion between the rotating magnetic fields, and the percentage of the relative motion speed is the slip ratio, which is generally 2% -6%. Because the pump core 11 and the tubular shaft 12 of the cell pump are fixed together, the rotor 5 directly drives the pump core 11 to rotate together when rotating, and the pump blades in the pump core 11 directly transmit the rotating mechanical energy to the fluid in the pump core 11, so that the fluid can obtain the corresponding pressure energy (mainly) and kinetic energy.

The invention has the following advantages:

(1) the pump is integrated with the prime mover. The battery cell pump fixes the pump core 11 in the prime motor tubular shaft 12, the rotation mechanical energy of the prime motor tubular shaft 12 is directly transmitted to fluid, no intermediate transmission link exists, and the efficiency of the battery cell pump can generally reach more than 80%.

(2) The pump core 11 has a round tube outside, pump blades inside, and a thin rod in the center. The pump blade is three or more continuous spiral blades with equal pitch which are uniformly distributed along the outer circular tube and the central thin rod, and the helix angle of the pump blade is 45 +/-15 degrees; the outer contour of the pump blade is fusiform (jujube core shape), namely the middle is cylindrical and the two ends are conical. The pump core 11 of the electric core pump is composed of the round pipe, the pump blades and the thin rod, if the power of a prime motor is unchanged (the shape installation size is unchanged), the pump cores 11 of different models can be obtained by changing the helix angle of the helical blades, and therefore different performance parameters (flow and lift) can be obtained.

(3) The pump blades of the pump core 11 are three or more continuous spiral blades with equal pitch which are uniformly distributed along the outer circular tube and the central thin rod, so that the stability is high and the dynamic balance performance is very good; the outer contour of the pump blade is fusiform (jujube core shape), so that the stress of the pump blade at different lead positions is basically the same, and the impact cannot be generated.

(4) A fluid director 1 is arranged at the fluid inlet of the battery cell pump. The inside of the fluid director 1 is a taper hole, namely, the aperture of one end close to the pump core 11 is small, the aperture of one end far away from the pump core 11 is large, three (or more) fluid-directing spiral blades are uniformly and fixedly distributed along the inner wall of the taper hole, the contraction angle of the three (or more) fluid-directing spiral blades is the same as the angle of the taper hole of the fluid director 1, the spiral direction of the three (or more) fluid-directing spiral blades is the same as that of the taper hole of the pump core 11, and the included angle between. When fluid is conveyed, the pipe diameters of outer pipes are designed according to the friction resistance of the economic ratio, and the flow velocity of the fluid in the outer pipes is generally lower than half of that of the fluid in the pump core 11; the flow direction of the fluid in the outer pipe is in the same direction as the central axis of the pump, and the actual flow direction of the fluid in the pump core 11 is deflected under the action of the helical blades, and the deflection angle is smaller than the helix angle of the helical blades. In view of this, the deflector 1 functions as: the fluid which is about to enter the pump core 11 is subjected to acceleration, pressure reduction and flow guide in advance, so that the flow speed and the flow direction of the fluid approach to the flow speed and the flow direction of the fluid at the center of the pump core 11, the sudden change of the flow speed and the flow direction of the fluid in the pump body is avoided, the generation of turbulent flow and vortex flow in the pump body is prevented to the greatest extent, the impact is reduced, and the noise is reduced; the depressurization facilitates the conversion of the rotational mechanical energy into pressure energy of the fluid by the pump cartridge 11.

(5) The inlet end of the pump core 11 is provided with conical spiral blades. The fluid entering the pump core 11 is subjected to acceleration, pressure reduction and flow guide again, so that the flow speed and the flow direction of the fluid are consistent with those of the fluid in the center of the pump core 11, the sudden change of the flow speed and the flow direction of the fluid in the pump core 11 is avoided, the turbulence and the vortex generated by the pump core 11 are prevented to the maximum extent, the impact is reduced, and the noise is reduced; the pressure reduction facilitates efficient conversion of the rotational mechanical energy into pressure energy of the fluid by the pump core 11.

(6) The outlet end of the pump core 11 is provided with a conical spiral blade. The fluid leaving the pump core 11 is subjected to speed reduction, pressure boosting and rectification in advance, so that the flow speed and the flow direction of the fluid approach to the flow speed and the flow direction of the fluid in the rectifier 7, the sudden change of the flow speed and the flow direction of the fluid in the rectifier 7 is avoided, the turbulence and the vortex generated by the rectifier 7 are prevented to the greatest extent, the impact is reduced, and the noise is reduced; the boost facilitates the rectifier 7 to convert part of the kinetic energy into pressure energy of the fluid.

(7) The pump core 11 has a central thin rod. The helical blade can be accurately positioned; the helical blade is ensured not to deform during operation; no matter the rotating speed is high or low, the fluid can be ensured not to flow back, and the internal leakage phenomenon can be ensured not to occur; because of the central thin rod, the flow passage space in the pump core 11 is uniformly separated, and the fluidization of the fluid flowing layer in the pump core 11 is ensured to the maximum extent.

(8) And a rectifier 7 is arranged at the fluid outlet of the battery cell pump. The rectifier 7 is internally provided with a taper hole, namely, the diameter of the taper hole close to one end of the pump core 11 is small, the diameter of the taper hole far away from one end of the pump core 11 is large, three (or more) rectifying spiral blades are uniformly and fixedly distributed along the inner wall of the taper hole, the expansion angle of the rectifying spiral blades is the same as that of the taper hole of the rectifier 7, the spiral direction of the rectifying spiral blades is the same as that of the pump core 11, and the included angle between the rectifying spiral blades and the central axis is 1/3-1/2 of. When fluid is conveyed, the pipe diameters of outer pipes are designed according to the friction resistance of the economic ratio, and the flow velocity of the fluid in the outer pipes is generally lower than half of that of the fluid in the pump core 11; the flow direction of the fluid in the outer pipe is in the same direction as the central axis of the pump, and the actual flow direction of the fluid in the pump core 11 is deflected under the action of the helical blades, and the deflection angle is smaller than the helix angle of the helical blades. In this regard, the rectifier 1 functions as: the fluid out of the pump core 11 is decelerated, boosted and rectified again, so that the flow speed and the flow direction of the fluid are consistent with those of the fluid in the outer pipe, the sudden change of the flow speed and the flow direction of the fluid at the outlet of the pump is avoided, the turbulent flow and the vortex flow at the outlet of the pump are prevented to the maximum extent, the impact is reduced, and the noise is reduced; the boost facilitates the rectifier 7 to convert part of the kinetic energy into pressure energy of the fluid.

(9) And useless power consumption is avoided. The inlet and outlet of the battery cell pump are on the same straight line, the fluid director 1 and the rectifier 7 are respectively arranged at the two ends of the battery cell pump, and the battery cell pump can be directly installed on the fluid main pipeline through the flange plate on the battery cell pump without additional leading or turning installation, so that useless power consumption is avoided, and the installation space is saved.

(10) Has no basic energy consumption and has the function of changing waste into valuable. The pump core 11 of the battery core pump is arranged in the tubular shaft 12 of the prime motor, heat generated by iron loss and magnetic loss of the prime motor can be taken away by fluid flowing through the pump core 11, and a special fan is not needed for cooling the prime motor, so that no basic energy consumption exists. For a centralized heating system, heat generated by iron loss and magnetic loss of a prime motor is wasted originally, but a battery cell pump is adopted, and the wasted heat can be effectively recycled into the heating system, so that the centralized heating system has the function of changing waste into valuable.

Drawings

Fig. 1 is a schematic view of a cell pump assembly of the present invention.

Fig. 2 is a schematic diagram of a cell pump (spiral shuttle) core of the present invention.

Fig. 3 is a schematic view of the cell pump flow director (rectifier) of the present invention.

Numbering in the figures: 1. the pump comprises a fluid director, 2 pump end covers, 3 pump shells, 4 stators, 5 rotors, 6 bearings, 7 rectifiers, 8 fixing rings, 9 sealing rings I, 10 sealing rings II, 11 pump cores and 12 pipe shafts.

Detailed Description

The specific structure of the invention is shown in the attached figures 1, 2 and 3. The drawings are only provided for a better understanding of the invention and they should not be construed as limiting the invention.

Referring to the structure of the battery cell pump shown in fig. 1

The fluid director 1 is fixed on the pump end cover 2 through a fastening screw and a branch port; an observation window is arranged on the pump body, a pointer is arranged below the center of the observation window, and the running direction of the pump is judged according to the deflection direction of the pointer, which is shown in figure 3.

The pump end cover 2 is fixed on the pump shell 3 through a fastening screw and a branch opening.

The pump shell 3 is a shell of the battery cell pump and plays a role in supporting and protecting each part in the pump; the pump shell 3 is provided with a cable junction box, a binding post is arranged in the junction box, and the binding post is connected with wires of each phase winding of the stator 4.

The stator 4 is fixed in the pump housing 3, is composed of a stator core and a stator winding, and is used for generating a rotating magnetic field.

The rotor 5 is fixed to the pipe shaft 12, and is composed of a rotor core and a rotor winding, and functions to convert a rotating magnetic field generated by the stator 4 into rotating mechanical energy of the rotor.

A bearing 6 is fixed and positioned within the pump end cap 2 for supporting the spool 12 to ensure that the spool 12 rotates normally.

The flow straightener 7 is similar in structure to the flow director 1, see fig. 3.

The fixing ring 8 fixes the pump core 11 to the tube shaft 12, and rotates the pump core 11 together with the tube shaft 12.

The sealing ring I9 and the sealing ring II 10 are arranged between the fluid director 1, the rectifier 7 and the tubular shaft 12, play a role in sealing protection, separate the fluid in the pump core 11 from the stator 4 and the rotor 5 of the battery cell pump, and prevent the fluid from leaking into the stator 4 and the rotor 5 to cause faults such as electrical short circuit and the like.

The pump core 11 is a core component of the electric core pump, and the pump core 11 is used for converting the rotational mechanical energy generated by the rotor 5 into pressure energy (mainly) and kinetic energy of fluid; the outside of the pump core 11 is a circular pipe, the blades of the pump core 11 are helical blades, the outer contour is fusiform (jujube core shape), and the center is provided with a thin rod; the pump cartridge 11 is fixed in the pipe shaft 12 by means of a fixing ring 8, rotating together with the pipe shaft 12, see fig. 2.

The tubular shaft 12 is hollow, and has a pump core 11 mounted in its inner hole, and its outer circle has two sides supported by bearings 6, and its outer circle has a middle section fixed to the rotor 5 and rotating together with the rotor.

The operation of the present invention will be described in detail with reference to the accompanying drawings.

When the winding of the stator 4 of the cell pump is electrified, a rotating magnetic field is generated in the inner circle space of the stator 4, the rotating magnetic field rotates anticlockwise when viewed from left to right in the figure 1, the rotating magnetic field cuts the stationary winding conductor of the rotor 5, induced potential is generated in the winding conductor of the rotor 5, the direction of the potential is determined by the right-hand rule, and the potential of the winding conductor of the upper rotor 5 is higher at the left side and lower at the right side in the figure 1, and the potential of the winding conductor of the lower rotor 5 is higher at the right. Because the winding conductors of the rotor 5 are shorted by the end rings, a closed-loop current flows through the winding conductors of the rotor 5 under the action of the induced potential, and if the phase relationship between the potential and the current is not considered, the direction of the current in the winding conductors of the rotor 5 is considered to be the same as the direction of the potential, and the direction of the current in the winding conductors of the rotor 5 in fig. 1 is clockwise. The currents in the winding conductors of the rotor 5 interact with the rotating magnetic field generated by the stator 4 to generate electromagnetic forces acting on the winding conductors of the rotor 5, the direction of which is determined by the left-hand rule, the direction of the electromagnetic forces of the winding conductors of the upper rotor 5 in fig. 1 pointing from the outside to the inside, and the direction of the electromagnetic forces of the winding conductors of the lower rotor 5 pointing from the inside to the outside. This electromagnetic force rotates the rotor 5 in the direction of the rotating magnetic field of the stator 4, i.e., counterclockwise as viewed from left to right. The rotor 5 and the stator 4 must have relative motion between the rotating magnetic fields, and the percentage of the relative motion speed is the slip ratio, which is generally 2% -6%. The pump core 11 of the battery cell pump is fixed in the tubular shaft 12 and rotates together with the tubular shaft 12, the spiral pump blade inside the pump core 11 is fixedly connected with the circular tube outside the pump core, so that the battery cell pump rotor 5 directly drives the pump core 11 to rotate together when rotating, the spiral pump blade inside the pump core 11 in fig. 1 is three right-handed spiral blades, and when rotating anticlockwise, liquid inside the pump core 11 flows from the left end inlet to the right end outlet of the pump under the action of the three right-handed spiral blades, so that the rotating mechanical energy of the tubular shaft 12 of the battery cell pump is converted into pressure energy (which is main) and kinetic energy which are required by the fluid.

The invention can be applied to a circulating pump and a water replenishing pump of a central heating system; a refrigeration pump, a cooling pump and a water replenishing pump of the central air-conditioning system; a feed pump of a tap water system; a sewage pump of a sewage system; a delivery pump of a petroleum and petrochemical system, and the like.