CN111536051A - Cell pump - Google Patents

Abstract

The invention discloses an electric core pump. The pump core of the battery pump is installed in the prime mover tube shaft, so that the pump and the prime mover are integrated; the rotating mechanical energy of the prime mover tube shaft is directly transmitted to the fluid without intermediate transmission links. The outer part of the pump core of the electric core pump is a circular tube, the inner part is a pump blade, and the center is a thin rod; The angle is 45±15°; the outer contour of the pump blade is fusiform (jujube-shaped), that is, the middle is cylindrical and the two ends are conical. There is a deflector at the fluid inlet of the cell pump, and a rectifier at the fluid outlet. The cell pump eliminates useless power consumption, there is no basic energy consumption, and has the function of turning waste into treasure. The efficiency of the cell pump fluid conveying system can reach more than 80%, which greatly reduces the energy consumption of the fluid conveying system, reduces the manufacturing cost of the fluid conveying equipment, and saves the installation space of the fluid conveying equipment.

Description

Cell pump

technical field

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

Background technique

A pump is a fluid machine that transports liquids. It transfers the mechanical energy of the 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 increases.

The traditional pump must work with the prime mover. The pump and the prime mover are separate and independent; the fluid flow area, flow direction, flow rate and pressure in the pump often have dramatic changes, and the fluid flow in the pump is mainly turbulent or eddy current. , there is basically no laminar flow; the manufacturing process is complicated, the volume is large, the cost is high, and the efficiency is low (usually the efficiency is only 30% to 60%).

The existing new type of hollow screw pump is to install the hollow screw blade (or impeller) in the motor shaft. On the one hand, at the pump inlet and outlet, the fluid flow direction, flow rate and pressure all change abruptly, which is easy to produce impact and noise; On the one hand, the hollow spiral blade (or impeller) is unevenly stressed, has a short service life and is inefficient; secondly, the center of the spiral blade (impeller) is empty, and the rotation speed is too high or too low, and the fluid will flow back from the center. , internal leakage occurs. Therefore, the existing new hollow screw pump still has problems such as high cost, high noise and low efficiency.

The existing patent (Publication No.: CN1030967A, Application No.: 88104722.8) relates to a liquid compressor having a cylinder and a rotary rod located in the cylinder. A helical groove is formed on the outer peripheral surface of the rotary rod, and there is a helical blade suitable for the helical groove. The blade divides the space formed by the inner peripheral surface of the cylinder and the outer peripheral surface of the rotary rod into a plurality of operation chambers. The volume of the chamber gradually decreases as it moves away from one end of the cylinder. Therefore, when the cylinder and the rotary rod rotate relative to each other, the fluid introduced from one end of the cylinder is moved to the other end of the cylinder in the action chamber. It can be seen from this that: the pitch of the spiral blades of the device is not equidistant and changes gradually; the volume of each action chamber is also gradually changed, that is, the volume of the action chamber gradually decreases from the suction side of the cylinder to the discharge side; When the rotary rod rotates relatively, the fluid in it is gradually compressed by a plurality of action chambers to form a high-pressure fluid, so as to drive other machinery to work. The purpose of the device is to provide a power device, that is, a compressor, which is not used to transport liquid, nor can it be used to transport liquid (small flow rate), so the device does not have the basic function of a pump.

The existing patent (publication number: CN103807207A, application number: 201210436592.2) relates to an induction hollow screw pushing device with a novel structure. It uses an integrated spiral ring inside the hollow rotor of the motor to add the object to be pushed into the input port to perform work movement, thereby increasing the flow volume of the object to be pushed and ensuring a smooth stroke. The helical ring is a hollow shaftless multi-turn multi-ring tubular structure, which is driven by direct induction, and the sealed housing is completely isolated from the outside, that is, the friction between the spacer and the shaft, and the friction between the drive and the rotor is reduced, that is, it is reduced. noise. It can directly adjust the speed of the object to be pushed and adjust the rotation speed and forward and reverse rotation, so that the overall driving efficiency exceeds that of existing pumps, propellers, fans, screw air compressors and screw excavation equipment. It can be seen from this: the spiral ring of the device is a tubular structure of hollow shaftless, multi-turn and multi-ring; the spiral ring is hollow and shaftless, and the rotation speed is too high or too low, and the fluid (the object to be pushed) will flow back from the center, resulting in internal leakage. , its efficiency will be significantly reduced; the spiral ring is a multi-circle and multi-ring tubular structure, and the flow direction, flow rate, and pressure of the fluid (the object to be pushed) at the input port are different from those in the spiral ring, so the fluid (the object to be pushed) will affect the front of the spiral ring. The ring (a ring near the input port end) produces a severe impact, and its efficiency will be reduced; the spiral ring is a multi-circle and multi-ring tubular structure, and almost all the pressure energy of the fluid (pushed object) at the output port is generated by the rear ring (near the output) of the spiral ring. Therefore, the actual force of the spiral ring is extremely uneven, which shortens the service life.

SUMMARY OF THE INVENTION

In view of the above-mentioned problems, the purpose of the present invention is to provide a high-efficiency pump-cell pump, so as to improve the efficiency of the fluid conveying system, reduce the energy consumption of the fluid conveying system, reduce the manufacturing cost of the fluid conveying equipment, and save the installation space of the fluid conveying equipment, etc. technical problem.

In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

Cell pump structure: cell pump consists of deflector 1, pump end cover 2, pump casing 3, stator 4, rotor 5, bearing 6, rectifier 7, fixing ring 8, sealing ring Ⅰ9, sealing ring Ⅱ10, pump core 11. The pipe shaft 12 is composed of etc. The deflector 1 is fixed on the pump end cover 2 by tightening screws and a branch; there is an observation window on it, and a pointer is arranged under the center of the observation window, and the running direction of the pump is judged by the deflection direction of the pointer. The pump end cover 2 is fixed on the pump casing 3 by fastening screws and branches. The pump casing 3 is the shell of the battery pump, which supports and protects the various components in the pump; the pump casing 3 is provided with a cable junction box, and the junction box has a terminal, which is connected with the wires of each phase winding of the stator 4. The stator 4 is fixed in the pump casing 3 and consists of a stator core and a stator winding, and its function is to generate a rotating magnetic field. The rotor 5 is fixed on the tube shaft 12 and consists of a rotor core and a rotor winding, and its function is to convert the rotating magnetic field generated by the stator 4 into the rotating mechanical energy of the rotor. The bearing 6 is fixed and positioned in the pump end cover 2 to support the tube shaft 12 and ensure the normal rotation of the tube shaft 12 . The rectifier 7 is similar in structure to the deflector 1 . The fixing ring 8 fixes the pump core 11 on the tube shaft 12 , so that the pump core 11 and the tube shaft 12 rotate together. The sealing ring I9 and the sealing ring II10 are installed between the deflector 1, the rectifier 7 and the tube shaft 12, which play a sealing protection role, and separate the fluid in the pump core 11 from the stator 4 and rotor 5 of the battery pump to prevent fluid It leaks into the stator 4 and the rotor 5, causing faults such as electrical short circuit. The pump core 11 is the core component of the battery pump. The function of the pump core 11 is to convert the rotational mechanical energy generated by the rotor 5 into the pressure energy (mainly) and kinetic energy of the fluid; the outside of the pump core 11 is a circular tube, and the pump core 11 The blade is a helical blade, the outer contour is shuttle-shaped (jujube-shaped), and there is a thin rod in the center; The tube shaft 12 is hollow, the pump core 11 is installed in the inner hole, the two sides of the outer circle are supported by the bearings 6, and the middle section of the outer circle is fixed with the rotor 5 and rotates together with the rotor.

The working principle of the cell pump: when the stator 4 winding of the cell pump is supplied with current, a rotating magnetic field is generated in the inner circular space of the stator 4, and the rotating magnetic field cuts the stationary rotor 5 winding conductor, and an induced potential is generated in the rotor 5 winding conductor. Since the winding conductors of the rotor 5 are short-circuited by the end rings, current flows in the winding conductors of the rotor 5 under the action of the induced potential. Disregarding the phase relationship between the potential and the current, 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 makes the rotor 5 rotate along the direction of the rotating magnetic field of the stator 4 . There must be relative motion between the rotor 5 and the rotating magnetic field of the stator 4, and the percentage of the relative motion speed is the slip rate, which is generally 2% to 6%. Because the pump core 11 and the tube shaft 12 of the battery pump are fixed together, the rotor 5 directly drives the pump core 11 to rotate together, and the pump blades in the pump core 11 directly transmit the rotational mechanical energy to the fluid in the pump core 11. , so that the fluid obtains due pressure energy (mainly) and kinetic energy.

The present invention has the following advantages:

(1) The pump is integrated with the prime mover. The cell pump is to fix the pump core 11 in the prime mover tube shaft 12, and the rotational mechanical energy of the prime mover tube shaft 12 is directly transferred to the fluid without intermediate transmission links, and the cell pump efficiency can generally reach more than 80%.

(2) The outside of the pump core 11 is a circular tube, the inside is a pump blade, and the center is a thin rod. The pump blade is three or more continuous equal-pitch helical blades evenly distributed along the outer circular tube and the central thin rod, and its helix angle is 45±15°; The middle is cylindrical and the ends are conical. The circular tube, pump blade and thin rod form the pump core 11 of the electric core pump. If the power of the prime mover is unchanged (the outer and installation dimensions are unchanged), different types of pump cores 11 can be obtained by changing the helix angle of the helical blade. , so as to obtain different performance parameters (flow, head).

(3) The pump blades of the pump core 11 are three or more continuous helical blades of equal pitch distributed evenly along the outer circular tube and the central thin rod, so the stability is high and the dynamic balance performance is very good; the outer contour of the pump blades is a shuttle If the shape (jujube core shape) is used, the force of the pump blades at different lead positions is basically the same, and there will be no impact.

(4) A deflector 1 is provided at the fluid inlet of the cell pump. The inside of the deflector 1 is a tapered hole, that is, the diameter of one end close to the pump core 11 is small, and the diameter of the end far from the pump core 11 is large, and three (or more) guide spiral blades are evenly and fixedly distributed along the inner wall of the tapered hole, and the angle of its contraction The angle of the taper hole is the same as that of the deflector 1 , the spiral direction is the same as that of the pump core 11 , and the included angle with the central axis is 1/3 to 1/2 of the helix angle of the pump core 11 . When the fluid is transported, the diameter of the outer pipe is designed according to the economic specific friction resistance, and the fluid velocity in the outer pipe is generally lower than half of the fluid velocity in the pump core 11; Due to the action of the helical blade, the actual flow direction of the fluid has been deflected, and the deflection angle is smaller than the helix angle of the helical blade. In view of this, the function of the deflector 1 is to increase, depressurize, and guide the fluid that is about to enter the pump core 11 in advance, so that its flow rate and flow direction are close to the fluid flow rate and flow direction in the center of the pump core 11, so as to avoid the fluid flow rate. The sudden change in the pump body and the flow direction in the pump body prevents the turbulent flow and eddy current in the pump body to the greatest extent, reduces the impact and reduces the noise.

(5) The conical helical blade at the inlet end of the pump core 11. The fluid entering the pump core 11 is again accelerated, depressurized, and diverted, so that its flow rate and flow direction tend to be consistent with the fluid flow rate and flow direction in the center of the pump core 11, and the sudden change of the fluid flow rate and flow direction in the pump core 11 is avoided. , the pump core 11 is prevented from generating turbulent flow and eddy current to the greatest extent, and the impact and noise are reduced.

(6) The conical helical blade at the outlet end of the pump core 11. The fluid that leaves the pump core 11 is decelerated, boosted, and rectified in advance, so that its flow rate and flow direction are close to the fluid flow rate and flow direction in the rectifier 7, so as to avoid the sudden change of the fluid flow rate and flow direction in the rectifier 7, and prevent the rectifier to the greatest extent. The rectifier 7 generates turbulent flow and eddy current, which reduces impact and noise; boosting the pressure is beneficial for the rectifier 7 to convert part of the kinetic energy into the pressure energy of the fluid.

(7) The central thin rod of the pump core 11. The spiral blade can be positioned accurately; the spiral blade is not deformed during operation; no matter the rotation speed is high or low, it can ensure that the fluid does not flow back, which can ensure no internal leakage; due to the central thin rod, the inner flow channel space of the pump core 11 They are evenly spaced to ensure laminar fluidization of fluid flow in the pump core 11 to the greatest extent possible.

(8) A rectifier 7 is provided at the fluid outlet of the cell pump. The inside of the rectifier 7 is a tapered hole, that is, the hole diameter at one end close to the pump core 11 is small, and the hole diameter at the end away from the pump core 11 is large. The angle of the taper hole is the same, and its spiral direction is the same as that of the pump core 11 , and the included angle between it and the central axis is 1/3 to 1/2 of the helix angle of the pump core 11 . When the fluid is transported, the diameter of the outer pipe is designed according to the economic specific friction resistance, and the fluid velocity in the outer pipe is generally lower than half of the fluid velocity in the pump core 11; Due to the action of the helical blade, the actual flow direction of the fluid has been deflected, and the deflection angle is smaller than the helix angle of the helical blade. In view of this, the function of the rectifier 1 is to decelerate, boost and rectify the fluid leaving the pump core 11 again, so that its flow rate and flow direction are consistent with the flow rate and flow direction of the fluid in the outer pipe, so as to avoid the fluid flow rate and flow direction in the outer pipe. The sudden change at the pump outlet prevents turbulent flow and eddy current at the pump outlet to the greatest extent, reduces the impact and reduces the noise; the boosting is beneficial to the rectifier 7 to convert part of the kinetic energy into the pressure energy of the fluid.

(9) Useless power consumption is eliminated. The inlet and outlet of the battery pump are in a straight line, and the two ends are the deflector 1 and the rectifier 7 respectively. Through the flange on it, the battery pump can be directly installed on the main fluid pipeline without additional lead or bend installation. Therefore, there is no useless power consumption, and the installation space is also saved.

(10) There is no basic energy consumption and the function of "turning waste into treasure". The pump core 11 of the battery pump is installed in the prime mover tube shaft 12, the heat generated by the iron loss and magnetic loss of the prime mover can be carried away by the fluid flowing through the pump core 11, and no special fan is needed to cool the prime mover, so there is no Basic energy consumption. For the central heating system, the heat generated by the iron loss and magnetic loss of the prime mover was originally wasted, but with the use of the cell pump, this part of the wasted heat can be effectively recovered into the heating system, so it has the "turning waste into waste". Treasure" function.

Description of drawings

FIG. 1 is a schematic diagram of the general assembly of the cell pump of the present invention.

Figure 2 is a schematic diagram of the core pump (screw shuttle) pump core of the present invention.

3 is a schematic diagram of a cell pump flow guide (rectifier) of the present invention.

Numbers in the figure: 1. deflector, 2. pump end cover, 3. pump casing, 4. stator, 5. rotor, 6. bearing, 7. rectifier, 8. fixing ring, 9. sealing ring I, 10. Sealing ring II, 11. Pump core, 12. Tube shaft.

Detailed ways

The specific structure of the present invention is shown in Figure 1 , Figure 2 and Figure 3 . The accompanying drawings are provided only for a better understanding of the present invention, and they should not be construed to limit the present invention.

Refer to the structure of the cell pump shown in Figure 1

The deflector 1 is fixed on the pump end cover 2 by tightening screws and a branch; there is an observation window on it, and a pointer is arranged under the center of the observation window, and the running direction of the pump is judged by the deflection direction of the pointer, see Figure 3.

The pump end cover 2 is fixed on the pump casing 3 by fastening screws and branches.

The pump casing 3 is the shell of the battery pump, which supports and protects the various components in the pump; the pump casing 3 is provided with a cable junction box, and the junction box has a terminal, which is connected with the wires of each phase winding of the stator 4.

The stator 4 is fixed in the pump casing 3 and consists of a stator iron core and a stator winding, and its function is to generate a rotating magnetic field.

The rotor 5 is fixed on the tube shaft 12 and consists of a rotor core and a rotor winding, and its function is to convert the rotating magnetic field generated by the stator 4 into the rotating mechanical energy of the rotor.

The bearing 6 is fixed and positioned in the pump end cover 2 to support the tube shaft 12 and ensure the normal rotation of the tube shaft 12 .

The rectifier 7 is similar in structure to the deflector 1 , see FIG. 3 .

The fixing ring 8 fixes the pump core 11 on the tube shaft 12 , so that the pump core 11 and the tube shaft 12 rotate together.

The sealing ring I9 and the sealing ring II10 are installed between the deflector 1, the rectifier 7 and the tube shaft 12, which play a sealing protection role, and separate the fluid in the pump core 11 from the stator 4 and rotor 5 of the battery pump to prevent fluid It leaks into the stator 4 and the rotor 5, causing faults such as electrical short circuit.

The pump core 11 is the core component of the battery pump. The function of the pump core 11 is to convert the rotational mechanical energy generated by the rotor 5 into the pressure energy (mainly) and kinetic energy of the fluid; the outside of the pump core 11 is a circular tube, and the pump core 11 The blade is a helical blade, the outer contour is shuttle-shaped (jujube-shaped), and there is a thin rod in the center; the pump core 11 is fixed in the tube shaft 12 by the fixing ring 8, and rotates together with the tube shaft 12, see FIG. 2 .

The tube shaft 12 is hollow, the pump core 11 is installed in the inner hole, the two sides of the outer circle are supported by the bearings 6, and the middle section of the outer circle is fixed with the rotor 5 and rotates together with the rotor.

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

When current is applied to the windings of the stator 4 of the cell pump, a rotating magnetic field is generated in the inner circular space of the stator 4. Seen from left to right in Figure 1, it rotates counterclockwise. The rotating magnetic field cuts the stationary rotor 5 winding conductors. The induced potential is generated, and the direction of the potential is determined by the right-hand rule. In Figure 1, the upper rotor 5 winding conductor potential is high on the left and the right is low, and the lower rotor 5 winding conductor potential is high on the right and low on the left. Because the rotor 5 winding conductor is short-circuited by the end ring, under the action of the induced potential, a closed-loop current flows in the rotor 5 winding conductor. If the phase relationship between the potential and the current is not considered, it can be considered that the current in the rotor 5 winding conductor The direction of the electric potential is the same as that of the electric potential, and the current direction in the winding conductor of the rotor 5 in Fig. 1 is clockwise. The current in the rotor 5 winding conductor interacts with the rotating magnetic field generated by the stator 4, and an electromagnetic force acting on the rotor 5 winding conductor is generated, and its direction is determined by the left-hand rule. The direction of the electromagnetic force in the upper rotor 5 winding conductor in Fig. The direction of the electromagnetic force of the winding conductors of the inner and lower rotors 5 is from the inside to the outside. This electromagnetic force causes the rotor 5 to rotate along the direction of the rotating magnetic field of the stator 4, that is, to rotate counterclockwise when viewed from left to right. There must be relative motion between the rotor 5 and the rotating magnetic field of the stator 4, and the percentage of the relative motion speed is the slip rate, which is generally 2% to 6%. The pump core 11 of the cell pump is fixed in the tube shaft 12 and rotates together with the tube shaft 12. The spiral pump blade inside the pump core 11 is fixedly connected to the outer circular tube, so the rotor 5 of the cell pump directly drives the rotation of the pump core 11. The pump core 11 rotates together. The spiral pump blades in the pump core 11 in Fig. 1 are three right-handed spiral blades. When rotating counterclockwise, the liquid in the pump core 11 flows from the inlet of the left end of the pump under the action of the three right-handed spiral blades. To the right end outlet, in this way, the rotating mechanical energy of the electric core pump tube shaft 12 is converted into the pressure energy (mainly) and kinetic energy that the fluid should have.

The invention can be applied to the circulating pump and the make-up pump of the central heating system; the freezing pump, the cooling pump and the make-up pump of the central air-conditioning system; the feed pump of the tap water system; the sewage pump of the sewage system; the conveying pump of the petroleum and petrochemical system.

Claims (7)

1. A battery pump, characterized in that the pump core (11) is installed in the prime mover tube shaft (12), and the pump and the prime mover are organically integrated into one; the battery pump comprises a flow guide (1), a pump end Cover (2), pump casing (3), stator (4), rotor (5), bearing (6), rectifier (7), fixing ring (8), sealing ring I (9), sealing ring II (10) , a pump core (11) and a pipe shaft (12); the pump core (11) has a circular tube on the outside, pump blades inside, and a thin rod in the center; the pump blades are evenly distributed along the outer circular tube and the thin central rod Three or more continuous helical blades with equal pitch, the helix angle of which is 45±15°; the outer contour of the pump blade is fusiform, that is, the middle is cylindrical and the two ends are conical; the pump core (11) passes through the fixing ring ( 8) Fix it in the tube shaft (12) and rotate with the tube shaft (12). 2. The battery pump according to claim 1, characterized in that, the inside of the deflector (1) is a tapered hole, that is, the hole diameter of one end close to the pump core (11) is small, and the hole diameter of one end away from the pump core (11) is large. , three or more guide helical blades are uniformly and fixedly distributed along the inner wall of the conical hole, the constriction angle is the same as that of the conical hole of the deflector (1), the helical direction is the same as that of the pump core (11), and the included angle between it and the central axis is the same. It is 1/3~1/2 of the helix angle of the pump core (11); the deflector (1) is fixed on the pump end cover (2) by tightening screws and branches; there is an observation window on it, and the center of the observation window is A pointer is provided below, and the running direction of the pump is judged by the deflection direction of the pointer; the rectifier (7) and the flow guide (1) have the same structural principle. 3. The battery pump according to claim 1, characterized in that, the pump end cover (2) is fixed on the pump casing (3) by fastening screws and a branch; the pump casing (3) is the outer casing of the battery pump , to support and protect various parts in the pump; the pump casing (3) is provided with a cable junction box, and the junction box has a terminal, which is connected with the wires of each phase winding of the stator (4); used to support the pipe shaft (12) and the bearing (6) which ensures the normal rotation of the pipe shaft (12) is fixed and positioned in the pump end cover (2). 4. The battery cell pump according to claim 1, characterized in that the sealing ring I (9) and the sealing ring II (10) which prevent the fluid from leaking into the stator (4) and the rotor (5), causing electrical short-circuit faults ) is installed between the deflector (1), the rectifier (7) and the pipe shaft (12) to separate the fluid in the pump core (11) from the stator (4) and rotor (5) of the battery pump. 5 . The battery pump according to claim 1 , wherein the stator ( 4 ) that generates the rotating magnetic field is fixed in the pump casing ( 3 ), and consists of a stator core and a stator winding. 6 . 6. The cell pump according to claim 1, characterized in that, the rotor (5) that converts the rotating magnetic field generated by the stator (4) into the rotational mechanical energy of the rotor is fixed on the tube shaft (12), and is composed of the rotor core and the rotor. Rotor winding composition. 7. The battery pump according to claim 1, characterized in that, the tube shaft (12) is hollow, the pump core (11) is installed in its inner hole, the two sides of its outer circle are supported by bearings (6), and its outer circle is supported by bearings (6). The middle section is fixed with the rotor (5) and rotates together with the rotor.

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