CN113864211A - Magnetic suspension pump, refrigeration equipment with same and air conditioner outdoor unit - Google Patents
Magnetic suspension pump, refrigeration equipment with same and air conditioner outdoor unit Download PDFInfo
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- CN113864211A CN113864211A CN202110954737.7A CN202110954737A CN113864211A CN 113864211 A CN113864211 A CN 113864211A CN 202110954737 A CN202110954737 A CN 202110954737A CN 113864211 A CN113864211 A CN 113864211A
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- 239000000725 suspension Substances 0.000 title claims abstract description 34
- 238000005057 refrigeration Methods 0.000 title claims description 9
- 238000007789 sealing Methods 0.000 claims abstract description 118
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000005339 levitation Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/46—Component arrangements in separate outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/059—Roller bearings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a magnetic suspension pump which comprises a motor, a pump, a first sealing ring, a second sealing ring and a buffer piece. The motor comprises a shell and a rotating shaft; the pump comprises a pump shell and an impeller, wherein the pump shell is fixedly connected with the machine shell or integrally manufactured, and the impeller is coaxially and fixedly connected with the rotating shaft; the first sealing ring is arranged on the machine shell and/or the pump shell; the second sealing ring is arranged on the impeller and matched with the first sealing ring, and an annular groove is formed on the first sealing ring or is formed by the first sealing ring when the second sealing ring rotates; a buffer piece is arranged between the first sealing ring and the shell and/or the pump shell, and the buffer piece can deform along the axial direction of the first sealing ring; and/or a buffer piece is arranged between the second sealing ring and the impeller, and the buffer piece can deform along the axial direction of the second sealing ring.
Description
Technical Field
The invention belongs to the field of power devices, and particularly provides a magnetic suspension pump, refrigeration equipment with the magnetic suspension pump and an air conditioner outdoor unit with the magnetic suspension pump.
Background
The magnetic suspension motor mainly comprises a shell, a stator, a rotating shaft, a radial magnetic suspension bearing and an axial thrust bearing, wherein the stator is arranged in the shell and fixedly connected with the shell, the rotating shaft is arranged in the stator, the radial magnetic suspension bearing is used for supporting the rotating shaft to rotate, and the axial thrust bearing is used for keeping the axial position of the rotating shaft. The magnetic suspension motor also comprises a protective bearing arranged in the shell, and the protective bearing is used for bearing the static rotating shaft. When the magnetic suspension motor works, the radial magnetic suspension bearing is electrified to separate the rotating shaft from the protection bearing and suspend the rotating shaft.
The magnetic suspension pump comprises a magnetic suspension motor and a pump driven by the magnetic suspension motor. When the magnetic suspension pump is powered off, the rotating shaft rotating at high speed loses buoyancy and impacts the protection bearing, and the protection bearing is easily damaged.
Disclosure of Invention
The invention aims to solve the problem that a protective bearing of the existing magnetic suspension pump is easily damaged by the impact of a rotating shaft when a magnetic suspension motor is powered off.
A further object of the invention is to extend the service life of the first sealing ring and/or the second sealing ring.
To achieve the above object, the present invention provides a magnetic levitation pump comprising:
a motor including a housing and a rotation shaft;
the pump comprises a pump shell and an impeller, the pump shell is fixedly connected with the machine shell or integrally manufactured, and the impeller is coaxially and fixedly connected with the rotating shaft;
a first seal ring provided on the casing and/or the pump housing;
the second sealing ring is arranged on the impeller and matched with the first sealing ring, and an annular groove is formed on or drawn by the first sealing ring when the second sealing ring rotates;
the buffer piece is arranged between the first sealing ring and the shell and/or the pump shell, and can deform along the axial direction of the first sealing ring; and/or the buffer piece is arranged between the second sealing ring and the impeller, and can deform along the axial direction of the second sealing ring.
Optionally, the buffer member is a buffer ring having an annular structure, and the buffer ring is arranged between the first sealing ring and the pump casing along the radial direction of the first sealing ring; the inner peripheral surface of the buffer ring abuts against the first seal ring, and the outer peripheral surface of the buffer ring abuts against the pump housing.
Optionally, the buffer is a spring disposed between the first seal ring and the pump housing in an axial direction of the first seal ring; one axial end of the spring is connected with the first sealing ring, and the other axial end of the spring is connected with the pump shell.
Optionally, the spring abuts against the first seal ring and the pump housing, respectively, and both axial ends of the first seal ring abut against at least one of the springs, respectively.
Optionally, the first sealing ring includes first axial sealing ring and first radial sealing ring, the second sealing ring includes second axial sealing ring and second radial sealing ring, first axial sealing ring with second axial sealing ring phase-match, first radial sealing ring with second radial sealing ring phase-match, first axial sealing ring with first radial sealing ring corresponds respectively has the bolster.
Optionally, the first sealing ring is an annular sleeve; the second sealing ring is an annular tooth, and the section of the annular tooth is wedge-shaped.
Optionally, the hardness of the first seal ring is less than the hardness of the second seal ring.
Optionally, the pump is a centrifugal pump.
In addition, the invention also provides refrigeration equipment which comprises the magnetic suspension pump in any one of the technical schemes.
Further, the invention also provides an air conditioner outdoor unit which comprises the magnetic suspension pump in any one of the technical schemes.
Based on the foregoing description, it can be understood by those skilled in the art that, in the foregoing technical solution of the present invention, by providing the first seal ring on the pump casing, providing the second seal ring on the impeller, and matching the first seal ring and the second seal ring, and making one of the first seal ring and the second seal ring be divided by the other into the annular groove, the pump casing and the impeller can realize dynamic sealing through the first seal ring and the second seal ring, and at the same time, the impeller can freely rotate relative to the pump casing through the annular groove.
It will also be appreciated by those skilled in the art that the clearance between the first and second seal rings is small because the annular groove is defined by either the first or second seal ring, particularly when the impeller is rotating. Therefore, when the motor is powered off, the first sealing ring and the second sealing ring can be contacted firstly, and then the rotating shaft is contacted with the protective bearing. When first sealing ring and second sealing ring contacted each other, can absorb the kinetic energy and the momentum of pivot to alleviate the pivot to the striking dynamics of protection bearing, avoided the impaired risk of protection bearing effectively.
Further, through set up the bolster between first sealing ring and casing and/or pump case, and/or, set up the bolster between second sealing ring and impeller, make first sealing ring or second sealing ring when the axial displacement of impeller along first sealing ring, can be with the help of the deformation of bolster, and move along with the impeller, the lateral wall of having avoided the ring channel is continued to be scratched by first sealing ring or second sealing ring, and then the width grow of having avoided the ring channel, make the ring channel can keep less width, and then guaranteed the clearance between first sealing ring and the second sealing ring, the life of first sealing ring and/or second sealing ring has been prolonged.
Further, by providing the first seal ring as an annular tooth, the width of the annular groove can be sufficiently narrow, thereby reducing the amount of outward leakage of fluid in the pump casing.
Still further, through setting up first sealing ring to include first axial sealing ring and first radial sealing ring, set up the second sealing ring to include second axial sealing ring and second radial sealing ring for first axial sealing ring and second axial sealing ring can absorb the ascending impact force of axial and restriction pivot epaxial displacement when the pivot cuts off the power supply, and first radial sealing ring and the radial sealing ring of second can absorb the ascending impact force of pivot radial and restriction pivot epaxial displacement when the pivot cuts off the power supply, and consequently can prevent that the pivot from taking place to deflect.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly explain the technical solution of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. Those skilled in the art will appreciate that elements or portions of the same reference number identified in different figures are the same or similar; the drawings of the invention are not necessarily to scale relative to each other.
In the drawings:
FIG. 1 is a cross-sectional view of a magnetic suspension pump in accordance with certain embodiments of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 2;
FIG. 4 is an enlarged view of portion C of FIG. 3;
FIG. 5 is a schematic illustration of the effect of the buffer in some embodiments of the present invention when the impeller is radially offset;
FIG. 6 is a schematic illustration of the effect of the buffer in some embodiments of the present invention when the impeller is axially offset;
fig. 7 is a schematic diagram illustrating the effect of the buffer member in other embodiments of the present invention.
Detailed Description
It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, not all of the embodiments of the present invention, and the part of the embodiments are intended to explain the technical principles of the present invention and not to limit the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments provided by the present invention without inventive effort, shall still fall within the scope of protection of the present invention.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," 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; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a sectional view of a maglev pump according to some embodiments of the present invention, fig. 2 is an enlarged view of a portion a of fig. 1, fig. 3 is an enlarged view of a portion B of fig. 2, and fig. 4 is an enlarged view of a portion C of fig. 3.
As shown in fig. 1, in some embodiments of the invention, a magnetic levitation pump includes a motor 1 and a pump 2. Preferably, the magnetic levitation pump includes two pumps 2, and the two pumps 2 are respectively disposed at both ends of the motor 1 in the axial direction. Furthermore, a person skilled in the art can also configure only one pump 2 for the maglev pump, if desired, i.e. omit the pump 2 on the left or right side of the motor 1 in fig. 1. Alternatively, one skilled in the art can also connect at least two pumps 2 in series on the left or right side of the motor 1 as desired.
With continued reference to fig. 1, the motor 1 includes a housing 11, a shaft 12, a radial magnetic bearing 13, an axial magnetic bearing 14, and a protection bearing 15. Wherein the rotating shaft 12 is rotatably arranged in the housing 11, and the radial magnetic bearing 13, the axial magnetic bearing 14 and the protection bearing 15 are fixedly arranged inside the housing 11.
In the energized state of the electric motor 1, the radial magnetic bearing 13, the axial magnetic bearing 14 and the protective bearing 15 all have a gap with the rotating shaft 12. Wherein, the radial clearance between the radial magnetic suspension bearing 13 and the rotating shaft 12 is smaller than the radial clearance between the protection bearing 15 and the rotating shaft 12; and the radial clearance between the axial magnetic suspension bearing 14 and the rotating shaft 12 is smaller than the radial clearance between the protective bearing 15 and the rotating shaft 12. So that in the de-energized state of the machine 1 the shaft 12 abuts against the protective bearing 15 and does not come into contact with the radial magnetic bearings 13 and/or the axial magnetic bearings 14.
With continued reference to fig. 1, the rotating shaft 12 is provided with a thrust disc 121, and two sides of the thrust disc 121 are respectively provided with an axial magnetic suspension bearing 14. When the motor 1 is energized, there is a gap between the thrust disk 121 and each of the two axial magnetic bearings 14.
It should be noted that, in the present invention, the radial magnetic bearing 13 and the axial magnetic bearing 14 each include a coil, and are members capable of generating a magnetic force when energized. Since the radial magnetic bearings 13 and the axial magnetic bearings 14 are conventional parts in the art and are commercially available, the present application is not described in more detail.
With continued reference to fig. 1, the pump 2 includes a pump housing 21 and an impeller 22. Wherein, the pump shell 21 is fixedly connected with the casing 11 or integrally manufactured, and the impeller 22 is coaxially and fixedly connected with the rotating shaft 12. The rotation of the shaft 12 drives the impeller 22 to rotate synchronously. Further, the pump housing 21 is provided with an inlet 201 and an outlet 202. The rotating impeller 22 creates a negative pressure within the pump casing 21, thereby forcing ambient fluid into the pump casing 21 from the inlet 201 and causing fluid within the pump casing 21 to exit the pump casing 21 from the outlet 202.
Although not shown in the figures, in some embodiments of the invention, the pump 2 is a centrifugal pump and the impeller 22 is a centrifugal impeller. Of course, the skilled person can also set the pump 2 as a plunger pump, a gear pump, a vane pump, a rotor pump, etc. in other embodiments of the invention, as required.
With continued reference to fig. 1, the pump casing 21 includes an inboard volute 211 and an outboard volute 212. The inside volute 211 and the outside volute 212 are fixedly connected together by screws or bolts, and the inside volute 211 is fixedly connected together with the housing 11 by screws or bolts.
As shown in fig. 2 and 3, in some embodiments of the present invention, the maglev pump further includes a first seal ring 3, a second seal ring 4, and a buffer 5. Wherein the first seal ring 3 and the second seal ring 4 are mated with each other, and the first seal ring 3 is provided on the pump housing 21 and the second seal ring 4 is provided on the impeller 22. The damper 5 is disposed between the first seal ring 31 and the pump housing 21.
Further, the first seal ring 3 may be provided on the impeller 22 and the second seal ring 4 may be provided on the pump housing 21, as required, by those skilled in the art.
Further, a person skilled in the art may also provide the cushion member 5 between the second seal ring 4 and the pump housing 21, or provide the cushion member 5 only between the second seal ring 4 and the pump housing 21, as necessary.
Preferably, as shown in fig. 2 and 3, the first sealing ring 3 comprises a first radial sealing ring 31 and a first axial sealing ring 32, the second sealing ring 4 comprises a second radial sealing ring 41 and a second axial sealing ring 42, the first radial sealing ring 31 is matched with the second radial sealing ring 41, and the first axial sealing ring 32 is matched with the second axial sealing ring 42.
As can be seen from the figure, the number of the second radial seal rings 41 and the number of the second axial seal rings 42 are respectively plural, so that the first radial seal ring 31 corresponds to the plural second radial seal rings 41, and the first axial seal ring 32 corresponds to the plural second axial seal rings 42. As can be appreciated by those skilled in the art, having the first seal ring 3 correspond to a plurality of second seal rings 4 reduces stress between the second seal rings 4 and the first seal ring 3, preventing the second seal rings 4 and the first seal rings 3 from excessively abrading each other. Furthermore, by providing the first seal ring 4 corresponding to the plurality of second seal rings 4, it is possible to form a multi-seal between the second seal ring 4 and the first seal ring 3, and prevent leakage of the fluid in the pump housing 21.
Further preferably, as shown in fig. 2 and 3, the inner volute 211 and the outer volute 212 are respectively provided with a first radial sealing ring 31 and a first axial sealing ring 32. Furthermore, one skilled in the art may also provide the first radial seal ring 31 and the first axial seal ring 32 only on the inner volute 211 or the outer volute 212, as desired; alternatively, the first radial seal ring 31 is provided on one of the inner and outer volutes 211 and 212, and the first axial seal ring 32 is provided on the other of the inner and outer volutes 211 and 212.
Although not shown in the drawings, the first seal ring 3 is an annular sleeve, or the first seal ring 3 is composed of a plurality of semi-annular structures. That is, the first radial seal ring 31 and/or the first axial seal ring 32 are annular sleeves, or the first seal ring 3 is composed of a plurality of semi-annular structures.
Further, although not shown in the drawings, the second seal ring 4 is an annular tooth, that is, both the second radial seal ring 41 and the second axial seal ring 42 are annular teeth. Preferably, the cross-section of the ring-shaped teeth is wedge-shaped (as shown in fig. 4).
Preferably, the second radial seal ring 41 and the second axial seal ring 42 are integrally formed on the impeller 22. Alternatively, a person skilled in the art may also fix the second radial sealing ring 41 and the second axial sealing ring 42 to the impeller 22 by a connection manner such as a threaded connection, a welding connection, an interference fit connection, a screw connection, and the like, and selectively provide the buffer 5 between the second radial sealing ring 41 and the impeller 22 and/or between the second axial sealing ring 42 and the impeller 22, as required.
Further, in some embodiments of the present invention, the hardness of the first seal ring 3 is less than the hardness of the second seal ring 4. So that the second seal ring 4 can score a shallow score, i.e. an annular groove 6, on the first seal ring 3 as the impeller 22 rotates (as shown in figure 4).
In order to achieve the above object, the first sealing ring 3 of the present invention may be made of any feasible material, such as epoxy resin, phenolic resin, etc.
Preferably, when the magnetic suspension pump is assembled, the first sealing ring 3 and the second sealing ring 4 are in transition fit. When the maglev pump is powered on, the rotating shaft 12 drives the impeller 22 and the second sealing ring 4 to rotate, and the rotating second sealing ring 4 scratches a shallow scratch, i.e. an annular groove 6 (as shown in fig. 4), on the first sealing ring 3 through the circumferential edge of the rotating second sealing ring 4.
As can be appreciated by those skilled in the art, since the annular groove 6 on the first seal ring 3 is delimited by the rotating second seal ring 4, the clearance between the first radial seal ring 31 and the second radial seal ring 41 and the clearance between the first axial seal ring 32 and the second axial seal ring 42 are sufficiently small (the partial area may even be 0). In other words, the annular groove 6 is created to accommodate the operation of the magnetic levitation pump, which not only saves production costs, but also allows the second sealing ring 4 to be sufficiently close to the first sealing ring 3 to provide a good seal for the pump 2, as compared to an annular groove machined by mechanical means.
Based on the foregoing description, it can be understood by those skilled in the art that the present invention can make the second seal ring 4, the impeller 22 and the rotating shaft 12 freely rotate relative to the first seal ring 3 by making an annular groove 6 on the first seal ring 3 during the rotation of the second seal ring 4, so that the pressure when the first seal ring 3 contacts with the second seal ring 4 is almost zero. Therefore, the first sealing ring 3 and the second sealing ring 4 of the invention also improve the sealing performance of the pump 2 and prevent the leakage (including external leakage and internal leakage) of the fluid compressed in the pump 2 on the premise of ensuring the low-resistance operation of the magnetic suspension pump.
Further, the present invention also provides that the first seal ring 3 includes a first radial seal ring 31 and a first axial seal ring 32, and the second seal ring 4 includes a second radial seal ring 41 and a second axial seal ring 42, so that the first radial seal ring 31 and the second radial seal ring 41 can absorb the impact force in the radial direction when the rotating shaft 12 is powered off and limit the displacement in the radial direction of the rotating shaft 12, and the first axial seal ring 32 and the second axial seal ring 42 can absorb the impact force in the axial direction when the rotating shaft 12 is powered off and limit the displacement in the axial direction of the rotating shaft 12, and thus can prevent the rotating shaft 12 from deflecting.
Furthermore, in other embodiments of the present invention, a person skilled in the art may also provide only the first radial seal ring 31 and the second radial seal ring 41, or only the first axial seal ring 32 and the second axial seal ring 42, on the pump 2, as required.
As shown in fig. 2 and 3, in some embodiments of the present invention, the buffer 5 is a buffer ring 51 having a ring structure. The cushion ring 51 is provided between the first seal ring 3 and the pump housing 21 in the radial direction of the first seal ring 3. The inner peripheral surface of the cushion ring 51 abuts against the first seal ring 3, and the outer peripheral surface of the cushion ring 51 abuts against the pump housing 21.
Specifically, at least one buffer ring 51 is disposed between the first radial seal ring 31 and the pump casing 21, and between the first axial seal ring 32 and the pump casing 21. Alternatively, a person skilled in the art may provide the cushion ring 51 only between the first radial seal ring 31 and the pump housing 21, or the cushion ring 51 only between the first axial seal ring 32 and the pump housing 21, as necessary.
Further, in some embodiments of the present invention, the buffer ring 51 is made of an elastic material, so that the buffer ring 51 can be deformed in the axial direction and/or the radial direction of the first sealing ring 3. Wherein the resilient material may be any feasible material, such as rubber, silicone, plastic, etc.
The deformation of the cushion ring 51 will be described in detail with reference to fig. 5 and 6. Fig. 5 is a schematic view of the effect of the buffer member in some embodiments of the present invention when the impeller is offset in the radial direction, and fig. 6 is a schematic view of the effect of the buffer member in some embodiments of the present invention when the impeller is offset in the axial direction.
As shown in fig. 5, when the impeller 22 is radially moved from the normal rotational position (the position coaxial with the protection bearing 15) in the direction indicated by the arrow in fig. 5, the second radial seal ring 41 presses the first radial seal ring 31 in the radial direction thereof, and thus causes the first radial seal ring 31 to press the corresponding damper ring 51 in the direction indicated by the arrow in fig. 5, deforming-thinning the corresponding portion of the damper ring 51 in the radial direction. At the same time, the second axial seal ring 42 presses the first axial seal ring 32 in the axial direction thereof (specifically, the second axial seal ring 42 presses the side wall of the annular groove 6 on the first axial seal ring 32 via the circumferential edge thereof), and thus the first axial seal ring 32 presses the corresponding cushion ring 51 in the direction indicated by the arrow in fig. 5, so that the corresponding portion on the cushion ring 51 is deformed in the axial direction.
As shown in fig. 6, when the impeller 22 is axially moved from the normal rotation position in the direction indicated by the arrow in fig. 6, the second radial seal ring 41 presses the first radial seal ring 31 in the axial direction thereof (specifically, the second radial seal ring 41 presses the side wall of the annular groove 6 on the first radial seal ring 31 by the circumferential edge thereof), and thus the first radial seal ring 31 presses the corresponding damper ring 51 in the direction indicated by the arrow in fig. 6, so that the corresponding portion of the damper ring 51 is deformed in the axial direction. At the same time, the second axial seal ring 42 presses the first axial seal ring 32 in the radial direction thereof, and thus causes the first axial seal ring 32 to press the corresponding cushion ring 51 in the direction indicated by the arrow in fig. 6, causing deformation-thinning in the radial direction of the corresponding portion on the cushion ring 51.
Based on the foregoing description, as can be understood by those skilled in the art, the buffer ring 51 is disposed such that the first radial seal ring 31 and the first axial seal ring 32 can move together with the impeller 22 by means of the deformation of the buffer member 51 when the impeller 22 moves in the radial direction or the axial direction, the side wall of the annular groove 6 on the second radial seal ring 41 and the second axial seal ring 42 is prevented from being continuously scratched by the first radial seal ring 31 and the first axial seal ring 32, and further the width of the annular groove 6 is prevented from being increased, so that the annular groove 6 can maintain a smaller width, and further the gap between the first seal ring 3 and the second seal ring 4 is ensured, and the service life of the first seal ring 3 is prolonged.
It can also be understood by those skilled in the art that since the buffer ring 51 absorbs the impact of the rotating shaft 12 and the impeller 22 during the deformation process, the buffer ring 51 can also reduce the impact of the rotating shaft 12 on the protection bearing 15, thereby prolonging the service life of the protection bearing 15.
Fig. 7 is a schematic diagram illustrating the effect of the buffer member in other embodiments of the present invention.
In other embodiments of the present invention, as shown in fig. 7, the damper 5 is a spring 52, the spring 52 is disposed between the first seal ring 3 and the pump housing 21 in the axial direction of the first seal ring 3, and one axial end of the spring 52 is connected to the first seal ring 3 and the other axial end of the spring 52 is connected to the pump housing 21. The abutment may be a hook or an abutment.
Specifically, the springs 52 abut against the first seal ring 3 and the pump housing 21, respectively, and both axial ends of the first seal ring 3 abut against at least one spring 52, respectively.
More specifically, two ends of the first radial seal ring 31 in the axial direction are respectively abutted with a spring 52, and one end of the spring 52 away from the first radial seal ring 31 is abutted with the pump housing 21. One spring 52 is also abutted against each of the two ends of the first axial seal ring 32 in the axial direction, and one end of the spring 52 remote from the first axial seal ring 32 is abutted against the pump housing 21. Alternatively, a person skilled in the art may also arrange only one spring 52 for the first radial seal ring 31 and/or the first axial seal ring 32, and fixedly connect one end of the spring 52 to the first radial seal ring 31 and/or the first axial seal ring 32, and fixedly connect the other end of the spring 52 to the pump housing 21, as required.
Preferably, the first radial seal ring 31 is slidable relative to the pump housing 21 in the axial direction thereof, and the first axial seal ring 32 is also slidable relative to the pump housing 21 in the axial direction thereof.
Further, when the impeller 22 is radially offset from the operating position (the rotation center is coaxial with the rotation center of the protection bearing 15), the second axial seal ring 42 presses the first axial seal ring 32 in its axial direction (specifically, the second axial seal ring 42 presses the side wall of the annular groove 6 on the first axial seal ring 32 by its circumferential edge), and thus causes the first axial seal ring 32 to press its corresponding spring 52, causing the spring 52 to be compressed.
When the impeller 22 is axially offset from the operating position, the second radial sealing ring 41 presses the first radial sealing ring 31 in its axial direction (in particular, the second radial sealing ring 41 presses, by its circumferential edge, the side wall of the annular groove 6 on the first radial sealing ring 31) and thus causes the first radial sealing ring 31 to press its corresponding spring 52, causing the spring 52 to be compressed.
Further, in other embodiments of the present invention, the buffering member 5 may be provided by any other feasible structure as required by those skilled in the art, for example, a plurality of arc-shaped plate-shaped members which are arranged between the first seal ring 3 and the pump housing 21 in the radial direction of the first seal ring 3. And the inner peripheral surface of each plate-like member abuts the first seal ring 3 and the outer peripheral surface of each plate-like member abuts the pump housing 21.
Further, although not shown in the drawings, in still other embodiments of the present invention, a refrigeration device is further provided, and the refrigeration device comprises the magnetic levitation pump described in any one of the above embodiments. In the other embodiments of the present invention, the magnetic suspension pump is used as a compressor of a refrigeration device for compressing a refrigerant. The refrigeration appliance includes a refrigerator, freezer and/or freezer.
Further, although not shown in the drawings, in still other embodiments of the present invention, an outdoor unit of an air conditioner is further provided, and the outdoor unit of the air conditioner includes the maglev pump according to any one of the embodiments. In the other embodiments of the present invention, the maglev pump is used as a compressor of an outdoor unit of an air conditioner for compressing a refrigerant.
So far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Without departing from the technical principle of the present invention, a person skilled in the art may split and combine the technical solutions in the above embodiments, and may make equivalent changes or substitutions for related technical features, and any changes, equivalents, improvements, etc. made within the technical concept and/or technical principle of the present invention will fall within the protection scope of the present invention.
Claims (10)
1. A magnetic levitation pump comprising:
a motor including a housing and a rotation shaft;
the pump comprises a pump shell and an impeller, the pump shell is fixedly connected with the machine shell or integrally manufactured, and the impeller is coaxially and fixedly connected with the rotating shaft;
a first seal ring provided on the casing and/or the pump housing;
the second sealing ring is arranged on the impeller and matched with the first sealing ring, and an annular groove is formed on or drawn by the first sealing ring when the second sealing ring rotates;
the buffer piece is arranged between the first sealing ring and the shell and/or the pump shell, and can deform along the axial direction of the first sealing ring; and/or the buffer piece is arranged between the second sealing ring and the impeller, and can deform along the axial direction of the second sealing ring.
2. The magnetic suspension pump of claim 1,
the buffer piece is a buffer ring with an annular structure, and the buffer ring is arranged between the first sealing ring and the pump shell along the radial direction of the first sealing ring;
the inner peripheral surface of the buffer ring abuts against the first seal ring, and the outer peripheral surface of the buffer ring abuts against the pump housing.
3. The magnetic suspension pump of claim 1,
the buffer piece is a spring, and the spring is arranged between the first sealing ring and the pump shell along the axial direction of the first sealing ring;
one axial end of the spring is connected with the first sealing ring, and the other axial end of the spring is connected with the pump shell.
4. The magnetic suspension pump of claim 3,
the spring is respectively abutted with the first sealing ring and the pump shell, and at least one spring is respectively abutted with two axial ends of the first sealing ring.
5. A magnetic suspension pump as in any of claims 2-4,
the first seal ring comprises a first axial seal ring and a first radial seal ring, the second seal ring comprises a second axial seal ring and a second radial seal ring,
the first axial seal ring mates with the second axial seal ring,
the first radial seal ring mates with the second radial seal ring,
the first axial sealing ring and the first radial sealing ring correspond to the buffer piece respectively.
6. A magnetic suspension pump as in any of claims 1-4,
the first sealing ring is an annular sleeve;
the second sealing ring is an annular tooth, and the section of the annular tooth is wedge-shaped.
7. A magnetic suspension pump as in any of claims 1-4,
the first seal ring has a hardness less than a hardness of the second seal ring.
8. The magnetic suspension pump of claim 7,
the pump is a centrifugal pump.
9. A refrigeration apparatus comprising a magnetic levitation pump as recited in any one of claims 1 to 8.
10. An outdoor unit of an air conditioner, comprising the maglev pump of any one of claims 1 to 8.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110954737.7A CN113864211A (en) | 2021-08-19 | 2021-08-19 | Magnetic suspension pump, refrigeration equipment with same and air conditioner outdoor unit |
| EP22857400.0A EP4361448A1 (en) | 2021-08-19 | 2022-06-15 | Magnetic suspension pump, refrigeration device having same, and air conditioner outdoor unit |
| PCT/CN2022/098940 WO2023020087A1 (en) | 2021-08-19 | 2022-06-15 | Magnetic suspension pump, refrigeration device having same, and air conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110954737.7A CN113864211A (en) | 2021-08-19 | 2021-08-19 | Magnetic suspension pump, refrigeration equipment with same and air conditioner outdoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113864211A true CN113864211A (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110954737.7A Pending CN113864211A (en) | 2021-08-19 | 2021-08-19 | Magnetic suspension pump, refrigeration equipment with same and air conditioner outdoor unit |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4361448A1 (en) |
| CN (1) | CN113864211A (en) |
| WO (1) | WO2023020087A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023020087A1 (en) * | 2021-08-19 | 2023-02-23 | 青岛海尔智能技术研发有限公司 | Magnetic suspension pump, refrigeration device having same, and air conditioner outdoor unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001107891A (en) * | 1999-10-07 | 2001-04-17 | Mitsubishi Heavy Ind Ltd | Centrifugal multi-stage compressor |
| CN101892989B (en) * | 2010-06-13 | 2012-05-09 | 西安航天泵业有限公司 | High-pressure double suction pump |
| CN104806560B (en) * | 2014-01-23 | 2017-10-27 | 珠海格力电器股份有限公司 | Sealing part and centrifugal compressor |
| CN104100540A (en) * | 2014-08-07 | 2014-10-15 | 珠海格力电器股份有限公司 | Centrifugal compressor and air conditioning system with same |
| CN112780584A (en) * | 2021-02-22 | 2021-05-11 | 珠海格力电器股份有限公司 | Magnetic suspension compressor |
| CN113864211A (en) * | 2021-08-19 | 2021-12-31 | 青岛海尔智能技术研发有限公司 | Magnetic suspension pump, refrigeration equipment with same and air conditioner outdoor unit |
-
2021
- 2021-08-19 CN CN202110954737.7A patent/CN113864211A/en active Pending
-
2022
- 2022-06-15 WO PCT/CN2022/098940 patent/WO2023020087A1/en active Application Filing
- 2022-06-15 EP EP22857400.0A patent/EP4361448A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023020087A1 (en) * | 2021-08-19 | 2023-02-23 | 青岛海尔智能技术研发有限公司 | Magnetic suspension pump, refrigeration device having same, and air conditioner outdoor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4361448A1 (en) | 2024-05-01 |
| WO2023020087A1 (en) | 2023-02-23 |
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