CN115726970A

CN115726970A - Large-traffic permanent magnetism shielding booster pump

Info

Publication number: CN115726970A
Application number: CN202111018194.4A
Authority: CN
Inventors: 陈歌瑶; 陈荣国
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2023-03-03

Abstract

The invention relates to a large-flow permanent magnet shielding booster pump, which comprises a pump body with a pump body input port and a pump body output port, and is characterized in that: the inner cavity of the pump body is divided into a first pump cavity, a second pump cavity, a water inlet cavity and a water outlet cavity, the first pump cavity and the second pump cavity are arranged in parallel, the first pump cavity is provided with a first input channel and a first output channel, and the second pump cavity is provided with a second input channel and a second output channel; the pump also comprises a first direct current permanent magnet motor and a second direct current permanent magnet motor, wherein a first stator and a first rotor of the first direct current permanent magnet motor are arranged in an isolated manner, the first rotor is positioned in the first pump cavity, and a first impeller is arranged on the first rotor; and a second stator and a second rotor of the second direct current permanent magnet motor are arranged in an isolated manner, the second rotor is positioned in the second pump cavity, and a second impeller is arranged on the second rotor. The permanent magnet shielding booster pump can enable liquid in the pump body to obtain larger flow, and simultaneously meet the requirements of large flow, low noise and miniaturization.

Description

Large-traffic permanent magnetism shielding booster pump

Technical Field

The invention relates to the field of booster pumps, in particular to a high-flow permanent magnet shielding booster pump.

Background

The existing small household booster pump mainly uses a centrifugal pump to meet the requirements of extremely high miniaturization and silence. When the centrifugal pump works, liquid in the inlet pipeline enters an impeller flow channel under the traction of the centrifugal impeller, then the liquid is driven to rotate along with the impeller, so that the liquid obtains kinetic energy, the liquid rotating along with the impeller is thrown out of the impeller flow channel due to inertia, the liquid obtains the kinetic energy from the process and has certain dynamic pressure, the liquid is conveyed out of the impeller flow channel and enters a pump inner cavity, finally, the liquid with pressure is continuously thrown out of the impeller, and the liquid in the extrusion pump inner cavity is output from an outlet of the booster pump.

The existing booster pump has two types of conventional asynchronous motor drive and permanent magnet motor drive, and the market mainstream mainly adopts a single-stage pump. The former needs a 220v power supply, the rotating speed of the motor is within the range of 1000 rpm-2900 rpm, the whole pump has larger volume and the impeller is relatively larger, and meanwhile, because the motor generally adopts air cooling for heat dissipation, the whole machine has higher noise; the latter is more extensive to adopt the shielding formula, is to make motor rotor and impeller into an organic whole, and the magnetic field that produces by outer stator drives inner rotor and rotates, can carry out regulation and control as required to motor speed when having avoided dynamic seal, and the rotational speed can reach 10000rpm and even higher, and the power can adopt DC power supply, controls below human safe voltage (36V), and the energy efficiency advantage is showing.

Under the same power level, higher rotating speed means that the outer diameter of the impeller of the pump must be smaller, the advantage is that the volume of the whole pump can be more compact and meets the requirement of a household near-living space, the shortage is that the pump flow which can be achieved by the impeller with small outer diameter is smaller than that of a conventional booster centrifugal pump, and the use comfort is affected by the undersize flow. Therefore, the single-stage permanent magnet shielding type booster pump driven by low direct-current voltage is limited in pump performance achieved by only depending on one centrifugal impeller to do work, and cannot meet the actual requirement of output in a higher flow range, if liquid is required to be output to a water terminal (such as water for a hotel villa) in a large flow rate, the application range cannot be further expanded, and the energy efficiency and volume advantages cannot be released.

Disclosure of Invention

The invention aims to solve the technical problem of providing a high-flow permanent magnet shielding booster pump aiming at the prior art. The permanent magnet shielding booster pump can ensure that the liquid in the pump body obtains larger flow, ensures that the efficiency of the whole pump is maintained at a high level, and simultaneously meets the requirements of large flow, low noise and miniaturization.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a large-traffic permanent magnetism shielding booster pump, includes the pump body that has pump body input port and pump body delivery outlet, its characterized in that: the inner cavity of the pump body is divided into a first pump cavity, a second pump cavity, a water inlet cavity and a water outlet cavity, the input port of the pump body is communicated with the water inlet cavity, and the output port of the pump body is communicated with the water outlet cavity; the first pump cavity and the second pump cavity are arranged in parallel, the first pump cavity is provided with a first input channel and a first output channel, the second pump cavity is provided with a second input channel and a second output channel, the first input channel and the second input channel are both directly communicated with the water inlet cavity, and the first output channel and the second output channel are both directly communicated with the water outlet cavity; the pump also comprises a first direct current permanent magnet motor and a second direct current permanent magnet motor, wherein a first stator and a first rotor of the first direct current permanent magnet motor are arranged in an isolated manner, the first rotor is positioned in the first pump cavity, and a first impeller is arranged on the first rotor; and a second stator and a second rotor of the second direct-current permanent magnet motor are arranged in an isolated manner, the second rotor is positioned in the second pump cavity, and a second impeller is arranged on the second rotor.

In a further improvement, the first pump chamber is composed of a first primary pump chamber and a first secondary pump chamber which are arranged in series, the first primary pump chamber and the first secondary pump chamber are directly communicated through a first connecting flow passage, the first input passage is communicated with the first primary pump chamber, and the first output passage is communicated with the first secondary pump chamber; the first rotor and the first impeller are arranged in the first primary pump cavity and the first secondary pump cavity. The structure can increase the dynamic pressure of a waterway, thereby improving the lift.

Firstly, at least two first primary pump cavities and at least two first secondary pump cavities which are communicated with each other are arranged in the pump body, and the first rotor and the first impeller are arranged in the first primary pump cavities and the first secondary pump cavities, so that liquid in the pump body can obtain higher dynamic pressure under the action of the two first impellers which are connected in series, the liquid output by the permanent magnet shielding booster pump has higher lift, and the load of a single driving motor is effectively reduced due to the cascading effect of the combined type multistage centrifugal pump, and the requirements of high lift, low noise and miniaturization are met;

secondly, when the condition to the same lift, this combination formula permanent magnetism shielding booster pump reaches high lift through two at least direct current permanent-magnet machine, and does not rely on a direct current permanent-magnet machine to realize high lift alone to can effectively reduce the noise of direct current permanent-magnet machine when reaching high lift, and successfully break through single direct current permanent-magnet machine's performance limit. In addition, an impeller with larger volume is not needed, so that the space in the pump body can be effectively saved, and the space utilization rate in the pump body is improved;

finally, because the chambers in the pump are independent of each other, and the impellers of the direct current permanent magnet motors are also independent of each other, and because the impellers are not in the same chamber, the water flow driven by the impellers in rotation cannot cause interference in one chamber, so that the effects of all the impellers can be effectively superposed, and the efficiency of increasing the lift is higher.

Alternatively, one or more of the first-stage pump chambers; if the number of the first secondary pump chambers is multiple, the first secondary pump chambers are connected in series and communicated with each other. The more the first secondary pump chambers, the higher the dynamic pressure formed by the water paths at the positions, and the higher the lift.

In a further improvement, the second pump chamber is composed of a second primary pump chamber and a second secondary pump chamber which are arranged in series, the second primary pump chamber and the second secondary pump chamber are directly communicated through a second connecting flow passage, the second input passage is communicated with the second primary pump chamber, and the second output passage is communicated with the second secondary pump chamber; and the second primary pump cavity and the second secondary pump cavity are both provided with the second rotor and the second impeller. The structure can increase the dynamic pressure of a waterway, and further lift is promoted.

Optionally, one or more of the second secondary pump chambers; if the number of the second secondary pump chambers is multiple, the second secondary pump chambers are connected in series and communicated with each other. The more the second secondary pump cavity is, the higher the dynamic pressure formed by the waterway at the position is, and the higher the lift is.

As an improvement, the pump body comprises a pump cover, wherein the pump cover is provided with a pump body input port, a pump body output port, a water inlet cavity and a water outlet cavity, the pump cover is also provided with two first lower concave parts and two second lower concave parts which are positioned at the lower part, and a first upper concave part and a second upper concave part which are positioned at the upper part, two adjacent first lower concave parts are communicated through the first upper concave part, and two adjacent second lower concave parts are communicated through the second upper concave part; the pump shell is mutually assembled with the pump cover, two first rotor cavities for accommodating the first rotors and two second rotor cavities for accommodating the second rotors are formed in the pump shell, two first stator cavities opposite to and separated from the first rotor cavities and two second stator cavities opposite to and separated from the second rotor cavities are formed in the back of the pump shell, the first lower concave parts and the first rotor cavities form the first pump cavities, and the second lower concave parts and the second rotor cavities form the second pump cavities; the base is assembled with the pump shell and covers the first stator cavity and the second stator cavity; and the cover plate is fastened on the pump cover and seals the first upper concave part and the second upper concave part, so that the first upper concave part forms the first connecting flow channel, and the second upper concave part forms the second connecting flow channel. The pump body is arranged in a split manner, so that the assembly of each component is facilitated.

The improved structure is characterized in that a first circuit board for controlling each first direct-current permanent magnet motor to work and a second circuit board for controlling each second direct-current permanent magnet motor to work are installed on the base, two groups of first power interfaces are arranged on the first circuit board, and two groups of second power interfaces are arranged on the second circuit board. The structure can freely select whether a certain direct current permanent magnet motor works or not so as to achieve the combination of different effects.

Compared with the prior art, the invention has the advantages that: the two impellers work in respective pump cavities simultaneously, fluid is divided into two paths through the water inlet cavity, one path of fluid is converged into the water outlet cavity through the first pump cavity, the other path of fluid is converged into the water outlet cavity through the second pump cavity, and the two paths of water paths are output from an output port of the pump body after the water outlet cavity is converged. Therefore, the flow of the liquid flowing out of the pump body in unit time can be larger, and due to the cascade effect of the parallel multi-stage centrifugal pump, the load of a single driving motor is effectively reduced, and the requirements of large flow, low noise and miniaturization are met; secondly, when aiming at the condition of the same lift, the combined permanent magnet shielding booster pump achieves large flow through at least two direct current permanent magnet motors, and does not depend on one direct current permanent magnet motor to achieve large flow, so that the noise of the booster pump when the lift reaches high can be effectively reduced, and the performance limit of a single direct current permanent magnet motor is successfully broken through. Moreover, because the large flow of the booster pump is realized in a mode of connecting a plurality of direct current permanent magnet motors in parallel, an impeller with larger volume is not needed, so that the space in the pump body can be effectively saved, and the space utilization rate in the pump body is improved; finally, because the chambers in the pump are independent of each other, and the impellers of the direct-current permanent magnet motors are also independent of each other, and because the impellers are not in the same chamber, the water flow carried by the impellers in rotation cannot cause interference in one chamber, so that the effects of all the impellers can be effectively superposed, and the efficiency of increasing the flow is higher.

Drawings

FIG. 1 is a first schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a second embodiment of the present invention;

FIG. 3 is a cross-sectional view (in the direction of the first pump chamber) of an embodiment of the present invention;

FIG. 4 is a cross-sectional view (in the direction of the second pump chamber) of an embodiment of the present invention;

FIG. 5 is a cross-sectional view (taken along the axial direction of the outlet of the body and viewed from above) of an embodiment of the present invention;

FIG. 6 is a first schematic perspective view of a pump cap according to an embodiment of the present invention;

FIG. 7 is a second schematic perspective view of a pump cover according to an embodiment of the present invention;

FIG. 8 is a first schematic perspective view of a pump housing according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of a pump housing according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 9, is a preferred embodiment of the present invention.

A large-flow permanent magnet shielding booster pump comprises a pump body 1 with a pump body input port 1a and a pump body output port 1b, wherein the inner cavity of the pump body 1 is divided into a first pump cavity 2, a second pump cavity 3, a water inlet cavity 4 and a water outlet cavity 5, the pump body input port 1a is communicated with the water inlet cavity 4, and the pump body output port 1b is communicated with the water outlet cavity 5; the first pump chamber 2 and the second pump chamber 3 are arranged in parallel, the first pump chamber 2 is provided with a first input channel 2a and a first output channel 2b, the second pump chamber 3 is provided with a second input channel 3a and a second output channel 3b, the first input channel 2a and the second input channel 3a are directly communicated with the water inlet chamber 4, and the first output channel 2b and the second output channel 3b are directly communicated with the water outlet chamber 5; the pump also comprises a first direct current permanent magnet motor 6 and a second direct current permanent magnet motor 7, wherein a first stator 61 and a first rotor 62 of the first direct current permanent magnet motor 6 are arranged in an isolated manner, the first rotor 62 is positioned in the first pump cavity 2, and a first impeller 621 is arranged on the first rotor 62; the second stator 71 and the second rotor 72 of the second dc permanent magnet motor 7 are isolated from each other, the second rotor 72 is located in the second pump chamber 3, and the second impeller 721 is installed on the second rotor 72.

The first pump chamber 2 in this embodiment is composed of a first primary pump chamber 21 and a first secondary pump chamber 22 which are arranged in series, the first primary pump chamber 21 and the first secondary pump chamber 21 are directly communicated through a first joining flow passage 2c, the first input passage 2a is communicated with the first primary pump chamber 21, and the first output passage 2b is communicated with the first secondary pump chamber 22; the first rotor 62 and the first impeller 621 are provided in both the first primary pump chamber 21 and the first secondary pump chamber 22.

The second pump chamber 3 is composed of a second primary pump chamber 31 and a second secondary pump chamber 32 which are arranged in series, the second primary pump chamber 31 and the second secondary pump chamber 32 are directly communicated through a second connecting flow passage 3c, the second input passage 3a is communicated with the second primary pump chamber 31, and the second output passage 3b is communicated with the second secondary pump chamber 32; the second primary pump chamber 31 and the second secondary pump chamber 32 are each provided with the second rotor 72 and the second impeller 721.

The first-stage pump chamber 21 may be one or more, in this embodiment, one; in the case of a plurality of first-stage pump chambers 21, the first-stage pump chambers are connected in series in tandem and communicate with each other. The second secondary pump chamber 32 may be one or more, in this embodiment one; if there are a plurality of second sub-pump chambers 32, they are connected in series in tandem and communicate with each other.

The pump body 1 comprises

The pump cover 11 is provided with the pump body input port 1a, the pump body output port 1b, the water inlet cavity 4 and the water outlet cavity 5, the pump cover 11 is further provided with two first lower recessed parts 111 and two second lower recessed parts 112 positioned at the lower part, and a first upper recessed part 113 and a second upper recessed part 114 positioned at the upper part, two adjacent first lower recessed parts 111 are communicated through the first upper recessed part 113, and two adjacent second lower recessed parts 112 are communicated through the second upper recessed part 114;

the pump housing 12 is assembled with the pump cover 11, the pump housing 12 is formed with two first rotor cavities 121 for accommodating the first rotors 62 and two second rotor cavities 122 for accommodating the second rotors 72, the back of the pump housing 12 is formed with two first stator cavities 123 opposite to and separated from the first rotor cavities 121 and two second stator cavities 124 opposite to and separated from the second rotor cavities 122, the first lower recess 111 and the first rotor cavities 121 form the first pump cavity 2, and the second lower recess 112 and the second rotor cavities 122 form the second pump cavity 3.

The base 13 is assembled with the pump housing 12, and covers the first stator chamber 123 and the second stator chamber 124.

And a cover plate 14 fastened to the pump cover 11 and sealing the first upper recess 113 and the second upper recess 114, so that the first upper recess 113 forms the first engaging flow passage 2c, and the second upper recess 114 forms the second engaging flow passage 3c.

The base 13 is provided with a first circuit board 8 for controlling each first dc permanent magnet motor 6 to work and a second circuit board 9 for controlling each second dc permanent magnet motor 7 to work, the first circuit board 8 is provided with two sets of first power interfaces 81, and the second circuit board 9 is provided with two sets of second power interfaces 91. For example, according to practical situations, when only the first dc permanent magnet motor 6 is required to operate, the first power interface 81 is electrically connected to an external power source, so that the first dc permanent magnet motor 6 operates; when the second dc permanent magnet 7 is only required to operate, the second power interface 91 is electrically connected to an external power source, so that the second dc permanent magnet 7 operates. Of course, the first power interface 81 and the second power interface 91 may also be electrically connected to the corresponding external power sources, respectively, so that the first dc permanent magnet motor 6 and the second dc permanent magnet motor 7 work together.

The following explains the working principle of the combined permanent magnet canned booster pump in this embodiment:

each first dc permanent magnet motor 6 and each second dc permanent magnet motor 7 work as an example, each first impeller 621 works in the first pump cavity 2, each second impeller 721 works in the second pump cavity 3, and the water body is divided into two paths after passing through the water inlet cavity 4 of the pump body input port 1 a.

The first path of water is sucked into the first primary pump chamber 21 through the first inlet channel 2a under the action of the first impeller 621 in the first primary pump chamber 21, and after the water generates a high pressure along with the high-speed rotation of the first impeller 621 in the first secondary pump chamber 22, the water is sucked into the first secondary pump chamber 22 through the first connecting flow passage 2c, then enters the first secondary pump chamber 22, and after the water generates a high pressure again along with the high-speed rotation of the first impeller 621 in the first secondary pump chamber 22, the water converges into the water outlet chamber 5 through the first outlet channel 2b of the first secondary pump chamber 22.

Under the action of the second impeller 721 in the second path of second primary pump chamber 31, the water is sucked into the second primary pump chamber 31 through the second input channel 3a, after the water generates a high pressure along with the high-speed rotation of the second impeller 721 in the second secondary pump chamber 32, the water is sucked into the second secondary pump chamber 32 through the second connecting flow passage 3c, then the water entering the second secondary pump chamber 32 generates a high pressure again along with the high-speed rotation of the second impeller 721 in the second secondary pump chamber 32, and the water is collected into the water outlet chamber 5 through the second output channel 3b of the second secondary pump chamber 32.

The two water paths are converged in the water outlet cavity 5 and finally output from the pump body output port 1b at a high speed and a large flow rate. Therefore, the flow of the liquid flowing out of the pump body in unit time is larger, and due to the cascading effect of the parallel type multistage centrifugal pump, the load of a single driving motor is effectively reduced, and the requirements of large flow, low noise and miniaturization are met.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "inside, outside", "up, down", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. The utility model provides a large-traffic permanent magnetism shielding booster pump, includes pump body (1) that has pump body input port (1 a) and pump body delivery outlet (1 b), its characterized in that: the inner cavity of the pump body (1) is divided into a first pump cavity (2), a second pump cavity (3), a water inlet cavity (4) and a water outlet cavity (5), the input port (1 a) of the pump body is communicated with the water inlet cavity (4), and the output port (1 b) of the pump body is communicated with the water outlet cavity (5); the first pump cavity (2) and the second pump cavity (3) are arranged in parallel, the first pump cavity (2) is provided with a first input channel (2 a) and a first output channel (2 b), the second pump cavity (3) is provided with a second input channel (3 a) and a second output channel (3 b), the first input channel (2 a) and the second input channel (3 a) are directly communicated with the water inlet cavity (4), and the first output channel (2 b) and the second output channel (3 b) are directly communicated with the water outlet cavity (5); the pump also comprises a first direct current permanent magnet motor (6) and a second direct current permanent magnet motor (7), wherein a first stator (61) and a first rotor (62) of the first direct current permanent magnet motor (6) are arranged in an isolated mode, the first rotor (62) is positioned in the first pump cavity (2), and a first impeller (621) is mounted on the first rotor (62); and a second stator (71) and a second rotor (72) of the second direct current permanent magnet motor (7) are arranged in an isolated manner, the second rotor (72) is positioned in the second pump cavity (3), and a second impeller (721) is arranged on the second rotor (72).

2. The high flow rate permanent magnet shielded booster pump according to claim 1, characterized in that: the first pump chamber (2) is composed of a first primary pump chamber (21) and a first secondary pump chamber (22) which are arranged in series, the first primary pump chamber (21) and the first secondary pump chamber (21) are directly communicated through a first connecting flow passage (2 c), the first input passage (2 a) is communicated with the first primary pump chamber (21), and the first output passage (2 b) is communicated with the first secondary pump chamber (22); the first rotor (62) and the first impeller (621) are provided in each of the first primary pump chamber (21) and the first secondary pump chamber (22).

3. The high flow permanent magnet shielded booster pump according to claim 2, wherein: one or more of the first-stage pump chambers (21); if the number of the first secondary pump chambers is multiple, the first secondary pump chambers (21) are connected in series and communicated with each other.

4. The high flow rate permanent magnet shield booster pump according to claim 2 or 3, characterized in that: the second pump chamber (3) consists of a second primary pump chamber (31) and a second secondary pump chamber (32) which are arranged in series, the second primary pump chamber (31) and the second secondary pump chamber (32) are directly communicated through a second connecting flow passage (3 c), the second input passage (3 a) is communicated with the second primary pump chamber (31), and the second output passage (3 b) is communicated with the second secondary pump chamber (32); the two primary pump chambers (31) and the second secondary pump chamber (32) are each provided with the second rotor (72) and the second impeller (721).

5. The high flow rate permanent magnet shield booster pump according to claim 4, characterized in that: one or more of the second secondary pump chambers (32); if the number of the second secondary pump chambers is multiple, the second secondary pump chambers (32) are connected in series and communicated with each other.

6. The high flow rate permanent magnet shield booster pump according to claim 4, characterized in that: the pump body (1) comprises

The pump cover (11) is provided with a pump body input port (1 a), a pump body output port (1 b), a water inlet cavity (4) and a water outlet cavity (5), the pump cover (11) is further provided with two first lower concave parts (111) and two second lower concave parts (112) which are positioned at the lower part, and a first upper concave part (113) and a second upper concave part (114) which are positioned at the upper part, two adjacent first lower concave parts (111) are communicated through the first upper concave part (113), and two adjacent second lower concave parts (112) are communicated through the second upper concave part (114);

a pump housing (12) assembled with the pump cover (11), wherein the pump housing (12) is provided with two first rotor cavities (121) for accommodating the first rotors (62) and two second rotor cavities (122) for accommodating the second rotors (72), the back of the pump housing (12) is provided with two first stator cavities (123) opposite to and separated from the first rotor cavities (121) and two second stator cavities (124) opposite to and separated from the second rotor cavities (122), the first lower concave parts (111) and the first rotor cavities (121) form the first pump cavity (2), and the second lower concave parts (112) and the second rotor cavities (122) form the second pump cavity (3);

a base (13) assembled with the pump housing (12) and covering the first stator chamber (123) and the second stator chamber (124);

and the cover plate (14) is fastened on the pump cover (11) and seals the first upper concave part (113) and the second upper concave part (114) so that the first upper concave part (113) forms the first connecting flow passage (2 c) and the second upper concave part (114) forms the second connecting flow passage (3 c).

7. The high flow rate permanent magnet shield booster pump of claim 5, characterized in that: install first circuit board (8) and second circuit board (9) of controlling each second direct current permanent-magnet motor (7) machine work that are used for controlling each first direct current permanent-magnet motor (6) work on base (13), two sets of first power source (81) have on first circuit board (8), be equipped with two sets of second power source (91) on second circuit board (9).