CN219492606U - Centrifugal pump unit driven by air-cooled disc type rare earth permanent magnet motor - Google Patents

Abstract

The utility model provides a centrifugal pump unit driven by an air-cooled disc type rare earth permanent magnet motor, which comprises: a motor unit for powering the centrifugal pump assembly; the motor unit includes: a rare earth permanent magnet motor and a disc-type protective shell which is arranged to cover the rare earth permanent magnet motor; the rare earth permanent magnet motor drives the impeller unit to rotate, the rare earth permanent magnet motor comprises a moving ring, a stationary ring and a transmission shaft, the moving ring is connected with the transmission shaft, the moving ring rotates to drive the transmission shaft to rotate, and a plurality of ventilation grooves are formed in the moving ring and the stationary ring; a plurality of ventilation holes are formed in the disc-type protective shell, and the ventilation grooves are communicated with the ventilation holes. According to the utility model, the movable ring is adopted to rotate to introduce external air into the disc type protective shell for cooling the rare earth permanent magnet motor, and the ventilation grooves are formed in the movable ring and the stationary ring, so that the heat is taken away by air flow, the temperature rise of the centrifugal pump unit is avoided, and the problem of the temperature rise of the centrifugal pump is solved.

Description

Centrifugal pump unit driven by air-cooled disc type rare earth permanent magnet motor

Technical Field

The utility model relates to the technical field of fluid conveying, in particular to a centrifugal pump unit driven by an air-cooled disc type rare earth permanent magnet motor.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Centrifugal pumps are mechanical devices that use rotation of an impeller to cause centrifugal movement of a fluid (e.g., water) and increase the flow rate of the fluid by centrifugal force. Centrifugal pumps typically include a centrifugal impeller that pushes fluid through the centrifugal force of a rotating vane toward the pump outlet and eventually expels the fluid as the motor rotates the centrifugal impeller, and therefore, the centrifugal pump must fill the pump housing and suction tube with fluid (e.g., water) prior to start-up.

The existing centrifugal pump has large energy consumption and large heating value, and when the centrifugal pump is operated, the temperature of the integral centrifugal pump is increased due to other factors such as heat dissipation and friction of a motor. The service life of the centrifugal pump can be influenced due to the fact that the centrifugal pump is too high in temperature, and the problems of sealing failure and the like of the centrifugal pump can be caused.

In view of this, there is a need for improvements in the prior art centrifugal pumps to address the problem of increased centrifugal pump temperatures.

Disclosure of Invention

The utility model provides a centrifugal pump unit driven by an air-cooled disc-type rare earth permanent magnet motor, which adopts the rotation of a movable ring to introduce external air into a disc-type protective shell for cooling the rare earth permanent magnet motor, and ventilation grooves are formed in the movable ring and a static ring, so that the air flow is facilitated to take away heat, and the temperature rise of the centrifugal pump unit is avoided.

The technical scheme for realizing the purpose of the utility model is as follows:

an air-cooled disc-type rare earth permanent magnet motor driven centrifugal pump unit, comprising: a motor unit for powering the centrifugal pump assembly;

the motor unit includes: a rare earth permanent magnet motor and a disc-type protective shell which is arranged to cover the rare earth permanent magnet motor;

the rare earth permanent magnet motor comprises a movable ring, a stationary ring and a transmission shaft, wherein the movable ring is connected with the transmission shaft, the movable ring rotates to drive the transmission shaft to rotate, and a plurality of ventilation grooves are formed in the movable ring and the stationary ring;

a plurality of ventilation holes are formed in the disc-type protective shell, and the ventilation grooves are communicated with the ventilation holes.

According to the utility model, the movable ring rotates to introduce external air into the disc-type protective shell to cool the rare earth permanent magnet motor, and ventilation grooves are formed in the movable ring and the stationary ring, so that the heat is taken away by air flow, and the temperature rise of the centrifugal pump unit is avoided.

According to the utility model, the air in the disc type protective shell is accelerated to flow by utilizing the high-speed rotation of the movable ring, so that the heat dissipation of the rare earth permanent magnet motor is facilitated.

As a further definition of the present utility model, it further comprises: an impeller unit coaxially arranged with the rare earth permanent magnet motor and a pump shell surrounding the impeller unit;

the disk-type protective housing is located the pump case top, and the bottom of disk-type protective housing is connected with the top of pump case, and the outward flange of pump case is located the outside of disk-type protective housing.

The utility model adopts the mode that the size of the pump shell is larger than that of the disc-type protective shell, thereby reflecting the small volume and thinner thickness of the rare earth permanent magnet motor, and further reducing the size of the whole centrifugal pump unit and meeting the use requirement of smaller installation space by coaxially installing the rare earth permanent magnet motor and the motor unit.

As a further improvement of the present utility model, the impeller unit includes: the impeller is arranged on the transmission shaft, the pump cover is arranged below the disc-type protective shell, and the sealing structure is arranged among the pump cover, the impeller and the transmission shaft;

the pump cover is connected with the pump shell, and the transmission shaft penetrates through the pump cover to be connected with the impeller.

The utility model adopts a sealing structure for sealing, and the sealing structure, the pump cover and the impeller jointly obstruct the air in the disc type protective shell from contacting with the fluid, so that the air is controlled to absorb the heat of the rare earth permanent magnet motor and then is discharged from the vent hole.

As a further improvement of the present utility model, the sealing structure includes: a water-lubricated bearing as a radial bearing, a mechanical seal inside the water-lubricated bearing;

the mechanical seal is connected with the transmission shaft and the impeller, and the water lubrication bearing is sleeved on the outer side of the mechanical seal.

The utility model collects the mode that the mechanical seal and the water lubrication bearing share one cavity, and reduces the axial dimension of the centrifugal pump unit to the maximum extent.

As a further improvement of the utility model, the bottom of the pump shell is provided with a liquid inlet, and the side wall of the pump shell is provided with a liquid outlet.

The utility model adopts the mode of liquid outlet from the side wall of the liquid inlet at the bottom, and further avoids the contact between the liquid and the air.

As a further definition of the present utility model, the disc-type protective case includes: the bearing body, the motor pressing plate which is positioned above the bearing body and connected with the bearing body, and the motor pressing cover which is positioned above the motor pressing plate and connected with the motor pressing plate;

a containing cavity is formed among the bearing body, the motor pressing plate and the motor pressing cover, the movable ring and the static ring are positioned in the containing cavity, and the transmission shaft penetrates through the bearing body in the containing cavity to be connected with an impeller unit of the centrifugal pump unit;

the ventilation hole is arranged on the bearing body, the motor pressing plate and the motor pressing cover.

The utility model adopts the disk type protective shell air cooling mode to cool the rare earth permanent magnet motor, does not need to be independently provided with a fan for heat dissipation, and effectively solves the problems of poor heat dissipation and large volume of the centrifugal pump unit.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, external air can be introduced into the disk-type protective shell for cooling the rare earth permanent magnet motor without arranging a fan and rotating the movable ring, and ventilation grooves are arranged on the movable ring and the static ring, so that the heat is taken away by air flowing, and the temperature rise of the centrifugal pump unit is avoided.

Drawings

FIG. 1 is a schematic diagram of a centrifugal pump unit driven by an air-cooled disk-type rare earth permanent magnet motor;

FIG. 2 is a schematic representation of the motor unit of FIG. 1;

FIG. 3 is a schematic representation of the rare earth permanent magnet motor of FIG. 2;

FIG. 4 is a schematic representation of the impeller unit of FIG. 1;

FIG. 5 is an enlarged view of a portion of the bearing and seal of FIG. 4;

FIG. 6 is a schematic diagram II of a centrifugal pump unit driven by an air-cooled disk-type rare earth permanent magnet motor;

in the figure, a 100-motor unit; 110-rare earth permanent magnet motor; 111-a first ring; 112-stationary ring; 113-a drive shaft; 120-a disc-type protective housing; 121-a bearing body; 122-motor platen; 123-motor gland; 200-impeller units; 210-an impeller; 220-pump cover; 230-mechanical sealing; 240-adjusting ring; 260-lock nut; 270-water lubricated bearings; 280-shaft sleeve; 300-pump shell; 410-a stop washer; 420-adjusting pad; 430-round nuts; 440-deep groove ball bearings.

Detailed Description

The present utility model will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present utility model, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present utility model by those skilled in the art.

In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present solution and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present solution.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present embodiment, unless otherwise indicated, the meaning of "a plurality" is two or more.

The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present scheme can be understood by those of ordinary skill in the art in a specific case.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, an embodiment of the present utility model provides a centrifugal pump unit driven by an air-cooled disc-type rare earth permanent magnet motor, including: a motor unit 100 for powering the centrifugal pump assembly; the motor unit 100 includes: a rare earth permanent magnet motor 110, a disc-type protective shell 120 which is arranged to cover the rare earth permanent magnet motor 110; the rare earth permanent magnet motor 110 drives the impeller unit 200 to rotate, the rare earth permanent magnet motor 110 comprises a movable ring, a stationary ring 112 and a transmission shaft 113, the movable ring is connected with the transmission shaft 113, the movable ring rotates to drive the transmission shaft 113 to rotate, and a plurality of ventilation grooves are formed in the movable ring and the stationary ring 112; the disc-type protective housing 120 is provided with a plurality of ventilation holes, and the ventilation grooves are communicated with the ventilation holes.

According to the embodiment of the utility model, the rotating ring is adopted to rotate to introduce external air into the disc-type protective shell 120 to cool the rare earth permanent magnet motor 110, and ventilation grooves are formed in the rotating ring and the stationary ring 112, so that the heat is taken away by air flow, and the temperature rise of the centrifugal pump unit is avoided.

The embodiment of the utility model accelerates the air in the disc-type protective housing 120 to flow by utilizing the high-speed rotation of the movable ring, thereby being more beneficial to the heat dissipation of the rare earth permanent magnet motor 110.

In practical applications, please continue to refer to fig. 1, 2, 3, 4, 5 and 6, the moving ring of the preferred embodiment of the present utility model includes a first moving ring 111 and a second moving ring, the stationary ring 112 is located between the first moving ring 111 and the second moving ring, and ventilation slots are disposed on both the first moving ring 111 and the second moving ring.

Still further, referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, in an embodiment of the present utility model, an air-cooled disc-type rare earth permanent magnet motor-driven centrifugal pump unit, preferably, the centrifugal pump unit further includes, in addition to the motor unit 100: an impeller unit 200 coaxially provided with the rare earth permanent magnet motor 110, and a pump casing 300 provided so as to surround the impeller unit 200; the disc-shaped protecting case 120 is located above the pump case 300, the bottom end of the disc-shaped protecting case 120 is connected with the top end of the pump case 300, and the outer edge of the pump case 300 is located at the outer side of the disc-shaped protecting case 120.

The embodiment of the utility model adopts the mode that the size of the pump shell 300 is larger than that of the disc-type protective shell 120, so that the size and thickness of the rare earth permanent magnet motor 110 are small, and the rare earth permanent magnet motor 110 and the motor unit 100 are coaxially arranged, so that the size of the whole centrifugal pump unit is further reduced, and the use requirement of a smaller installation space is met.

Still further, referring to fig. 1, 2, 3, 4, 5 and 6, in an embodiment of the present utility model, an air-cooled disc-type rare earth permanent magnet motor-driven centrifugal pump unit, preferably an impeller unit 200 includes: an impeller 210 mounted to the transmission shaft 113, a pump cover 220 mounted under the disk-type protective case 120, and a sealing structure provided between the pump cover 220, the impeller 210, and the transmission shaft 113; the pump cover 220 is connected to the pump casing 300, and the transmission shaft 113 penetrates the pump cover 220 to be connected to the impeller 210.

The embodiment of the utility model adopts a sealing structure for sealing, and the sealing structure, the pump cover 220 and the impeller 210 jointly block the air in the disc type protective shell 120 from contacting with the fluid, so that the air is controlled to absorb the heat of the rare earth permanent magnet motor 110 and then is discharged from the vent hole.

Still further, referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, in an embodiment of the present utility model, a centrifugal pump unit driven by an air-cooled disc-type rare earth permanent magnet motor, preferably, a sealing structure includes: a water-lubricated bearing 270 as a radial bearing, a mechanical seal 230 inside the water-lubricated bearing 270; the mechanical seal 230 is connected with the transmission shaft 113 and the impeller 210, and the water lubrication bearing 270 is sleeved outside the mechanical seal 230.

The embodiment of the utility model adopts a mode that the mechanical seal 230 and the water lubrication bearing 270 share one cavity, so that the axial size of the centrifugal pump unit is reduced to the maximum extent.

It should be noted that, the water lubricated bearing 270 according to the embodiment of the present utility model is used as a radial bearing, and the water lubricated bearing 270 is used to reduce friction. The mechanical seal 230 is located inside the water lubricated bearing 270 and shares a cavity therebetween, minimizing the axial size of the unit. The shaft seal flushing mode can adopt different schemes according to the type of the medium, and the mechanical seal flushing liquid can simultaneously lubricate the water lubrication bearing 270 while flushing the mechanical seal 230. Optionally, the impeller 210 of the embodiment of the present utility model is provided with a back vane or a structure of a seal ring plus a balance hole to balance the axial force, and forms a circulation loop system of the mechanical seal flushing fluid and the lubricating fluid of the water lubrication bearing 270.

Still further, referring to fig. 1, 2, 3, 4, 5 and 6, in the centrifugal pump unit driven by the air-cooled disc-type rare earth permanent magnet motor according to the embodiment of the present utility model, preferably, a liquid inlet is formed at the bottom of the pump casing 300, and a liquid outlet is formed at the side wall of the pump casing 300.

The embodiment of the utility model adopts a mode of discharging liquid from the side wall of the bottom liquid inlet, and further avoids the contact of liquid and air.

Still further, referring to fig. 1, 2, 3, 4, 5 and 6, in an embodiment of the present utility model, a centrifugal pump unit driven by an air-cooled disc-type rare earth permanent magnet motor, preferably a disc-type protective housing 120 includes: the bearing body 121, a motor pressing plate 122 which is positioned above the bearing body 121 and connected with the bearing body 121, and a motor pressing cover 123 which is positioned above the motor pressing plate 122 and connected with the motor pressing plate 122; a containing cavity is formed among the bearing body 121, the motor pressing plate 122 and the motor pressing cover 123, the movable ring and the static ring 112 are positioned in the containing cavity, and the transmission shaft 113 penetrates through the bearing body 121 in the containing cavity to be connected with the impeller unit 200 of the centrifugal pump unit; the vent holes are formed in the bearing body 121, the motor pressing plate 122 and the motor pressing cover 123.

The maintenance-free deep groove ball bearing 440 is arranged in the bearing body 121, the bearing adopts a grease lubrication type, and no lubricant is required to be additionally added in the service life of the bearing, so that medium pollution caused by leakage of the lubricant is avoided.

The embodiment of the utility model adopts the disc type protective shell 120 air cooling mode to cool the rare earth permanent magnet motor 110, does not need to be independently provided with a fan for heat dissipation, and effectively solves the problems of poor heat dissipation and large volume of the centrifugal pump unit.

It should be noted that, in the embodiment of the present utility model, a deep groove ball bearing 440 is disposed in the bearing body 121, the sealing structure includes a sealing ring, a shaft sleeve 280 is disposed between the deep groove ball bearing 440 and the sealing ring on the transmission shaft 113, and an adjusting ring 240 is disposed between the sealing ring and the impeller 210. In the embodiment of the utility model, ventilation grooves are arranged in an air cooling structure formed by the bearing body 121, the rare earth permanent magnet motor 110, the motor pressing plate 122 and the motor pressing cover 123 to realize air cooling.

With continued reference to fig. 1, 2, 3, 4, 5 and 6, in the embodiment of the present utility model, the air cooling structure (including the bearing body 121, the rare earth permanent magnet motor 110, the motor pressing plate 122 and the motor pressing cover 123) is provided with ventilation slots on the bearing body 121, the rare earth permanent magnet motor 110, the motor pressing plate 122 and the motor pressing cover 123, the rare earth permanent magnet motor 110 is used as a main device of the air cooling structure, and the rotating ring is provided with a fan-shaped structure, so that the effect of accelerating the circulation of air is achieved through high-speed rotation. The rare earth permanent magnet motor 110 of the embodiment of the utility model comprises a first movable ring 111, a stationary ring 112 and a second movable ring. The stationary ring 112 and the bearing body 121 are positioned in a matched manner through the spigot, and ventilation grooves are formed in the first movable ring 111, the stationary ring 112 and the second movable ring at the hub inside the rare earth permanent magnet motor 110, so that air circulation is quickened.

The rare earth permanent magnet motor 110 of the embodiment of the utility model has small volume and thinner thickness, and meanwhile, the rare earth permanent magnet motor 110 and the impeller 210 adopt a coaxial installation mode, so that the centrifugal pump unit further reduces the size and has smaller weight, thereby meeting the use requirement of smaller installation space. The rare earth permanent magnet motor 110 can be cooled by air cooling, so that the problem of poor heat dissipation is solved, and the working efficiency of the centrifugal pump unit is further improved.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. An air-cooled disc-type rare earth permanent magnet motor driven centrifugal pump unit, which is characterized by comprising: a motor unit for powering the centrifugal pump assembly;

the motor unit includes: a rare earth permanent magnet motor and a disc-type protective shell which is arranged to cover the rare earth permanent magnet motor;

the rare earth permanent magnet motor comprises a movable ring, a stationary ring and a transmission shaft, wherein the movable ring is connected with the transmission shaft, the movable ring rotates to drive the transmission shaft to rotate, and a plurality of ventilation grooves are formed in the movable ring and the stationary ring;

a plurality of ventilation holes are formed in the disc-type protective shell, and the ventilation grooves are communicated with the ventilation holes.

2. An air-cooled disc rare earth permanent magnet motor driven centrifugal pump assembly according to claim 1, further comprising: an impeller unit coaxially arranged with the rare earth permanent magnet motor and a pump shell surrounding the impeller unit;

the disk-type protective housing is located the pump case top, and the bottom of disk-type protective housing is connected with the top of pump case, and the outward flange of pump case is located the outside of disk-type protective housing.

3. An air-cooled disc rare earth permanent magnet motor driven centrifugal pump assembly according to claim 2, wherein the impeller unit comprises: the impeller is arranged on the transmission shaft, the pump cover is arranged below the disc-type protective shell, and the sealing structure is arranged among the pump cover, the impeller and the transmission shaft;

the pump cover is connected with the pump shell, and the transmission shaft penetrates through the pump cover to be connected with the impeller.

4. A centrifugal pump assembly driven by an air-cooled disc-type rare earth permanent magnet motor according to claim 3, wherein the sealing structure comprises: a water-lubricated bearing as a radial bearing, a mechanical seal inside the water-lubricated bearing;

the mechanical seal is connected with the transmission shaft and the impeller, and the water lubrication bearing is sleeved on the outer side of the mechanical seal.

5. The centrifugal pump unit driven by the air-cooled disc type rare earth permanent magnet motor according to claim 2, wherein the bottom of the pump shell is provided with a liquid inlet, and the side wall of the pump shell is provided with a liquid outlet.

6. An air-cooled disc rare earth permanent magnet motor driven centrifugal pump assembly according to claim 1, wherein the disc protective housing comprises: the bearing body, the motor pressing plate which is positioned above the bearing body and connected with the bearing body, and the motor pressing cover which is positioned above the motor pressing plate and connected with the motor pressing plate;

a containing cavity is formed among the bearing body, the motor pressing plate and the motor pressing cover, the movable ring and the static ring are positioned in the containing cavity, and the transmission shaft penetrates through the bearing body in the containing cavity to be connected with an impeller unit of the centrifugal pump unit;

the ventilation hole is arranged on the bearing body, the motor pressing plate and the motor pressing cover.