CN113339274B

CN113339274B - Low-vibration shielding type circulating pump

Info

Publication number: CN113339274B
Application number: CN202110581998.9A
Authority: CN
Inventors: 林光影; 易家乐
Original assignee: Zhejiang Sailingte Pump Technology Co ltd
Current assignee: Zhejiang Sailingte Pump Technology Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-11-25
Anticipated expiration: 2041-05-26
Also published as: CN113339274A

Abstract

The invention discloses a low-vibration shielding type circulating pump which comprises a pump body, an impeller and a front cover plate, wherein a motor stator and a motor rotor are arranged in the pump body, the motor rotor is in transmission connection with the impeller, a water inlet pipe is arranged on the front cover plate, the pump body comprises an inner layer and an outer layer, and a first channel is formed between the inner layer and the outer layer; a flow guide ring is arranged between the front cover plate and the pump body, the impeller is positioned in a working cavity formed by the front cover plate and the flow guide ring, and the working cavity is communicated with the first channel through the flow guide ring; the one end that the front shroud was kept away from to the pump body is equipped with the back shroud, be equipped with the outlet pipe on the back shroud, and outlet pipe and first passageway intercommunication, the outlet pipe is parallel with the inlet tube or on the same axis. Compared with the prior art, the installation space is smaller, and the vibration and the noise are relatively smaller during the work.

Description

Low-vibration shielding type circulating pump

Technical Field

The invention relates to the technical field of water pumps, in particular to a low-vibration shielding type circulating pump.

Background

The circulating pump is used for overcoming the resistance of the closed pipeline system and driving the medium in the pipeline to circularly flow. In small closed circulation pipelines such as hot water systems and household independent heating systems, in order to ensure smooth circulation and circulation effect of the pipelines, circulation pumps are usually additionally arranged on the pipelines to promote pipeline circulation. When the circulating pump is used in a household or a small-sized hot water system, the installation space is relatively small, most of the existing circulating pumps adopt centrifugal pumps, the water inlet direction and the water outlet direction are vertical to each other, the size is large, a large installation space is needed, and the use requirement of the existing circulating pump in a place with relatively small space cannot be met. In addition, since the circulation pump is generally installed in a re-indoor opening space and generally requires 24 hours of operation, its vibration noise has a significant influence on user comfort.

Disclosure of Invention

The invention aims to provide a centrifugal low-vibration shielding type circulating pump with axial water inlet and outlet and low vibration and noise.

The technical scheme adopted by the invention for solving the technical problems is that the circulating pump comprises a pump body, an impeller and a front cover plate, wherein a motor stator and a motor rotor are arranged in the pump body, the motor rotor is in transmission connection with the impeller, a water inlet pipe is arranged on the front cover plate, the pump body comprises an inner layer and an outer layer, and a first channel is formed between the inner layer and the outer layer; a flow guide ring is arranged between the front cover plate and the pump body, the impeller is positioned in a working cavity formed by the front cover plate and the flow guide ring, and the working cavity is communicated with the first channel through the flow guide ring; the one end that the front shroud was kept away from to the pump body is equipped with the back shroud, be equipped with the outlet pipe on the back shroud, and outlet pipe and first passageway intercommunication, the outlet pipe is parallel with the inlet tube or on the same axis.

Compared with the prior art, the invention has the advantages that: because the guide ring, the first channel of the pump body and the water outlet pipe on the rear cover plate are arranged, the water flow thrown out by the impeller passes through the guide ring, the first channel and the water outlet pipe, and then the water flow and the water flow of the water inlet pipe are in the same direction, so that a centrifugal linear pump is formed, and the whole installation space is relatively small; the guide ring and the front cover plate form a working cavity, so that the guide ring replaces part of the front cover plate and the pump body, the integral volume is smaller, and the pump is more suitable for being used in places with relatively smaller space; meanwhile, as the water flow passes through the first channel in the pump body, the water flow can take away heat generated by the pump body during working, so that the working environment temperature of a motor rotor and a motor stator in the pump body is relatively stable, the working efficiency is further ensured, the continuous working time of the equipment can be prolonged, the situation of overhigh temperature is not easy to occur, and the use stability is better; and the water flow passing through the pump body can also buffer the vibration generated during the operation of the pump body and absorb the noise, so that the vibration and the noise are relatively small during the operation of the equipment.

Furthermore, the guide ring comprises an inner ring and an outer ring, a guide channel is formed between the inner ring and the outer ring, a plurality of guide blades are arranged in the guide channel, the guide blades are uniformly distributed along the circumferential direction, the inner sides of the guide blades are connected with the inner ring, and the outer sides of the guide blades are connected with the outer ring; after the arrangement, the water flow is guided through the guide channel, and under the action of the guide vanes in the guide channel, the restriction on the circumferential rotation of the water flow is better, so that the water flow passing through the guide channel is relatively stable, the energy loss of the water flow is reduced, the noise generated by the water flow is reduced, and the effects of vibration reduction and noise reduction are achieved.

Furthermore, an included angle between one end of the guide blade close to the impeller and one end face of the guide ring close to the impeller is an acute angle, and an included angle between one end of the guide blade close to the pump body and one end face of the guide ring close to the pump body is a right angle; after the arrangement, the resistance of the rotating water flow entering the inlet of the guide ring is smaller, the energy loss is further reduced, and under the limiting action of the guide vanes, after the water flow flows out from the outlet of the guide ring, the linearity of the water flow is better, the water flow is more stable, the turbulent flow is not easy to occur, and the vibration reduction and noise reduction effects can be further achieved.

Further, the projection parts of two adjacent guide vanes on the same cross section on the pump body are overlapped; after the arrangement, the guide vanes have better effect on water flow and play a better role of beam current.

The pump further comprises a shell, the shell is sleeved on the outer sides of the rear cover plate, the pump body and the flow guide ring, and the shell is connected with the front cover plate; the shell is provided with a through hole for the water outlet pipe to extend out, and sealing elements are arranged between the shell and the front cover plate and between the shell and the rear cover plate for sealing; after the shell is arranged, the inner cavity of the whole shell can be sealed only by sealing two positions, so that the overall sealing difficulty can be reduced, the production cost can be reduced, the leakage risk can be reduced, the overall use stability can be improved, and the service life is long.

Further, the motor rotor comprises a fixed shaft and a motor rotor yoke; a cylindrical fixed shaft support is arranged in the pump body, one end of the fixed shaft support is open, and the other end of the fixed shaft support is sealed; one end of the opening of the fixed shaft bracket is connected with the inner layer of the pump body; the end face of one end, connected with the pump body, of the rear cover plate is provided with a convex connecting part, the front end of the connecting part is inserted into the inner layer of the pump body, the end face of the outer layer of the pump body is attached to the end face of the rear cover plate, and the side wall of the connecting part is provided with a drainage channel which is used for communicating the first channel with the water outlet pipe; the outer peripheral surface of the fixed shaft bracket and the inner peripheral surface of the inner layer form a motor stator mounting cavity; the motor stator is positioned in the motor stator mounting cavity, and the motor stator mounting cavity is not communicated with the working cavity; a support frame is arranged in the front cover plate, one end of the fixed shaft is fixed on the support frame, and the other end of the fixed shaft is fixed on the fixed shaft support; the motor rotor yoke is rotationally connected to the fixed shaft and is connected with the impeller; after setting up like this, the stability of dead axle is better, also can make electric motor rotor's rotational stability better, and then guarantees impeller pivoted stability, reduces impeller during operation vibration for holistic vibration is less, and the noise is also less, simultaneously again because electric motor stator installs the difficult condition that appears leaking electricity or electric motor stator is corroded by the medium and the short circuit in sealed electric motor stator installation cavity alone, electric motor stator's stability in use is better.

Furthermore, a bearing bush is arranged between the motor rotor yoke and the dead axle for connection; the fixed shaft and the fixed shaft bracket are integrally formed; the bearing bush has a large stress area and good stability, and the gap between the bearing bush and the fixed shaft is given based on calculation, so that the running stability of the motor rotor is ensured, and vibration and noise reduction are facilitated; after the dead axle and the dead axle bracket are integrally formed, the dead axle and the pump body have better coaxiality, so that the installation precision of a motor rotor yoke and an impeller is ensured, and the vibration and noise reduction effects can be realized.

Further, a glue filling hole is formed in the rear cover plate and communicated with the motor stator installation cavity; after the glue filling hole is formed, after the motor stator is installed, glue filling treatment can be carried out on the motor stator installation cavity, the fixing effect on the motor stator can be achieved, the damp-proof and anti-creeping effects can be achieved, the service life of equipment can be prolonged, and the use safety of the equipment can be improved.

Furthermore, an annular bulge is arranged on the end face of the front cover plate close to one end of the shell, the bulge is inserted in the shell, and the end face of the bulge is attached to the end face of the flow guide ring; then the arch sets up the back, when the switching, pegs graft the arch on the shell, because the pump body cup joints in the shell, so improve the axiality between dead axle support and the support frame to further guarantee the installation accuracy of dead axle, motor rotor yoke and impeller, the damping falls the effect of making an uproar better.

Furthermore, one end of the impeller, which is far away from the motor rotor, is rotatably connected with the front cover plate; both ends of the impeller are supported, so that the impeller has smaller vibration during working and better water effect, not only can play a role in vibration reduction and noise reduction, but also can improve the water outlet efficiency.

Furthermore, a wear-resistant ring is arranged between the impeller and the front cover plate for connection; the length and the clearance of the wear-resistant ring are set after model calculation, so that leakage loss can be effectively reduced, the whole sealing performance in the pump body is guaranteed, after the wear-resistant ring is used for a period of time and is worn, the wear-resistant ring can be directly replaced without replacing a front cover plate, and the maintenance cost can be reduced.

Furthermore, a plurality of supporting sheets are arranged between the inner layer and the outer layer for connection, and are uniformly distributed along the circumferential direction; the support sheet is of a straight strip structure, the length of the support sheet is smaller than that of the first channel, and the support sheet is located in the middle of the first channel in the axial direction; the supporting sheet of the structure has relatively weak cutting effect on water flow, good limiting effect on circumferential rotation of the water flow, obvious beam effect and relatively small consumption of water flow energy, and is beneficial to improving the efficiency of the pump.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic view of the low vibration canned motor cycle pump of the present invention;

FIG. 2 is an exploded view of the low vibration shielding type circulating pump of the present invention;

FIG. 3 is a side view of the low vibration screening type circulation pump baffle ring of the present invention;

FIG. 4 is another side view of the low vibration screening type circulation pump baffle ring of the present invention;

FIG. 5 is a cross-sectional view of the low vibration screen type circulation pump baffle ring of the present invention;

FIG. 6 is a schematic structural diagram of a low vibration shielding type circulating pump body according to the present invention;

FIG. 7 is a cross-sectional view of the low vibration shielded circulation pump body of the present invention;

fig. 8 is a side view of the low vibration canned motor pump of the present invention.

Wherein the reference numerals are specified as follows: 1. a pump body; 2. an impeller; 3. a front cover plate; 5. a motor stator; 6. a motor rotor; 7. a water inlet pipe; 8. an inner layer; 9. an outer layer; 10. a first channel; 11. a flow guide ring; 12. a working chamber; 13. a rear cover plate; 14. a water outlet pipe; 15. an inner ring; 16. an outer ring; 17. a flow guide channel; 18. a guide vane; 19. a housing; 20. a through hole; 21. a seal member; 22. fixing a shaft; 23. a motor rotor yoke; 24. a fixed shaft bracket; 25. a connecting portion; 26. a drainage channel; 27. a motor stator mounting cavity; 28. a support frame; 29. bearing bushes; 30. filling glue holes; 31. a protrusion; 32. a support sheet.

Detailed Description

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

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above terms should not be construed as limiting the present invention.

A low-vibration shielding type circulating pump comprises a pump body 1, an impeller 2 and a front cover plate 3, wherein the pump body 1 is of a cylindrical structure (certainly, the pump body also comprises a wiring mechanism, a control mechanism and the like, but the invention point created by the invention is not related, so that the description is not repeated herein), a motor stator 5 and a motor rotor 6 are arranged in the pump body 1, and an output shaft of the motor rotor 6 is connected with the impeller 2 (of course, the output shaft can also be connected with the impeller 2 through a gear or other transmission mechanisms) and is used for driving the impeller 2 to rotate; a water inlet pipe 7 is arranged on the front cover plate 3, and the water inlet pipe 7 and the front cover plate 3 are of an integrated structure; the pump body 1 comprises an inner layer 8 and an outer layer 9, wherein the inner layer 8 and the outer layer 9 are connected through a support sheet 32, and a first channel 10 is formed between the inner layer 8 and the outer layer 9; a flow guide ring 11 is arranged between the front cover plate 3 and the pump body 1, the impeller 2 is positioned in a working cavity 12 formed by the front cover plate 3, the flow guide ring 11 and the end part of the pump body 1 close to the flow guide ring 11, the working cavity 12 is communicated with the first channel 10 through the flow guide ring 11, and water flow centrifugally thrown out by the impeller 2 in the working cavity 12 enters the first channel 10 under the guide of the flow guide ring 11; the front cover plate 3 is connected with the pump body 1 through bolts, and sealing elements 21 are arranged between the front cover plate 3 and the outer ring 16 of the guide ring 11 and between the outer ring 16 of the guide ring 11 and the outer layer 9 of the pump body 1 for sealing; a rear cover plate 13 is arranged at one end, away from the front cover plate 3, of the pump body 1, a water outlet pipe 14 is arranged on the rear cover plate 13, a drainage channel 26 is arranged on the rear cover plate 13, the drainage channel 26 is used for communicating the water outlet pipe 14 with the first channel 10, the rear cover plate 13 is connected with the pump body 1 through bolts, sealing elements 21 are arranged between the inner side wall and the outer side wall of the drainage channel 26 and between the inner layer 8 and the outer layer 9 of the pump body 1 respectively for sealing, water flow is prevented from entering the position of the motor stator 5, and the use safety and the use stability of equipment are guaranteed; the axis of the water outlet pipe 14 is in the same straight line with the axis of the water inlet pipe 7.

When the water-saving device works, the water-saving device is electrified, so that the motor rotor 6 drives the impeller 2 to rotate, water entering the working cavity 12 from the water inlet pipe 7 is thrown out from the edge of the impeller 2 under the action of centrifugal force generated by rotation of the impeller 2, the thrown water flow changes direction under the action of the flow guide ring 11 and enters the first channel 10, and then the water flow changes direction through the flow guide channel 26 and enters the water outlet pipe 14. Thereby realizing that the water inlet and the water outlet are in the same direction.

In another embodiment, as shown in fig. 1 to 7, a circulation pump includes a pump body 1, an impeller 2 and a front cover plate 3; a motor stator 5 and a motor rotor 6 are arranged in the pump body 1, the motor rotor 6 is in transmission connection with the impeller 2, a water inlet pipe 7 is arranged on the front cover plate 3, and the water inlet pipe 7 and the front cover plate 3 are of an integrated structure; the pump body 1 comprises an inner layer 8 and an outer layer 9, the inner layer 8 and the outer layer 9 are radially divided into an annular inner layer 8 and an annular outer layer 9, and a first channel 10 is formed between the inner layer 8 and the outer layer 9; a flow guide ring 11 is arranged between the front cover plate 3 and the pump body 1, the impeller 2 is positioned in a working cavity 12 formed by the front cover plate 3, the flow guide ring 11 and the end part of the pump body 1 close to the flow guide ring 11, and the working cavity 12 is communicated with the first channel 10 through the flow guide ring 11; a rear cover plate 13 is arranged at one end of the pump body 1 far away from the front cover plate 3, a water outlet pipe 14 is arranged on the rear cover plate 13, the water outlet pipe 14 and the rear cover plate 13 are also of an integrated structure, the number of parts can be reduced, the storage and the installation are convenient, the production cost is reduced, and the water outlet pipe 14 is communicated with the first channel 10; the axis of the outlet pipe 14 is on the extension of the axis of the inlet pipe 7. The pump also comprises a shell 19, the shell 19 is sleeved on the outer sides of the rear cover plate 13, the pump body 1 and the flow guide ring 11, the shell 19 is connected with the front cover plate 3 through bolts, and the connection position is in a flange-type connection mode; a through hole 20 for the water outlet pipe 14 to extend out is arranged on the shell 19, and sealing elements 21 are arranged between the shell 19 and the front cover plate 3 and between the shell 19 and the rear cover plate 13 for sealing, wherein the sealing elements 21 are O-shaped sealing rings; compared with the previous embodiment, the present embodiment only needs to seal two positions to seal the inner cavity of the whole housing 19, which not only reduces the overall sealing difficulty, but also simplifies the installation, improves the production efficiency, reduces the production cost, reduces the risk of leakage at a few sealing positions, and further improves the overall use stability, and has a long service life.

As shown in fig. 3 to 5, the guide ring 11 includes an inner ring 15 and an outer ring 16, a guide channel 17 is formed between the inner ring 15 and the outer ring 16, a plurality of guide vanes 18 are arranged in the guide channel 17, the plurality of guide vanes 18 are uniformly distributed along the circumferential direction, the inner sides of the guide vanes 18 are connected with the inner ring 15, and the outer sides of the guide vanes 18 are connected with the outer ring 16; one end of the inner layer 8 of the pump body 1 close to the flow guide ring 11 is sleeved with the flow guide ring 11, the end face of the outer ring 16 of the flow guide ring 11 is attached to the end face of the outer layer 9 of the pump body 1 after the sleeve connection, the end face of the inner ring 15 of the flow guide ring 11 is attached to the step face of the inner layer 8 of the pump body 1, the size of the flow guide channel 17 at one end of the outer layer 9 close to the flow guide ring 11 is the same as that of the first channel 10, the transition part of the flow guide channel 17 and the first channel 10 is smoother, so that the water flow is not easy to generate turbulence when passing through, the noise generated by the water flow is reduced, and the noise reduction and shock absorption effects are achieved.

As shown in fig. 5, an included angle between one end of the guide vane 18 close to the impeller 2 and one end face of the guide ring 11 close to the impeller 2 is an acute angle, and an included angle between one end of the guide vane 18 close to the pump body 1 and one end face of the guide ring 11 close to the pump body 1 is a right angle, which can also be understood that the guide vane 18 is of a structure similar to a thread, but at the water outlet end, the guide vane 18 is radial, and the guide vane 18 mainly has a rectifying effect on the water flow, so that the circumferential rotation of the water flow while the water flow flows transversely is reduced; the projection parts of two adjacent guide vanes 18 on the same cross section on the pump body 1 are overlapped; the setting of guide vane 18 of import department makes the resistance that rotatory rivers entered into in the guide ring 11 littleer, reduces the loss of rivers energy, and under guide vane 18's rectification effect for rivers are from guide ring 11 export outflow back, and the linearity of rivers is better, and rivers are more stable, and the turbulent condition is difficult for appearing, can further play the absorbing effect of making an uproar that falls.

The motor rotor 6 comprises a fixed shaft 22 and a motor rotor yoke 23, and a strong magnet is embedded on the motor rotor yoke 23; a cylindrical fixed shaft support 24 is arranged in the pump body 1, one end of the fixed shaft support 24 is opened, the other end of the fixed shaft support 24 is sealed, and the fixed shaft support 24 and the pump body 1 are of an integrated structure, so that the number of parts can be reduced, the connection strength is improved, and the coaxiality between the fixed shaft support 24 and the pump body 1 can be improved; one end of the opening of the fixed shaft bracket 24 is connected with the inner layer 8 of the pump body 1, and the longitudinal sections of the whole fixed shaft bracket 24 and the pump body 1 are of a structure similar to a Chinese character 'gong'; the connecting part 25 of the bulge 31 is arranged on the end face of one end, connected with the pump body 1, of the rear cover plate 13, the front end of the connecting part 25 is inserted into the inner layer 8 of the pump body 1, the end face of the outer layer 9 of the pump body 1 is attached to the end face of the rear cover plate 13, and the connecting part 25 mainly aims to change the motor stator mounting cavity 27 into an independent sealed cavity, so that the motor stator 5 is not easy to generate electric leakage or the motor stator 5 is not easy to be corroded by water vapor after being mounted, and the use stability of the motor stator 5 is ensured; a plurality of drainage channels 26 are arranged on the side wall of the connecting part 25, the drainage channels 26 are used for communicating the first channel 10 with the water outlet pipe 14, and the drainage channels 26 are distributed along the circumferential direction; the outer circumferential surface of the fixed shaft bracket 24 and the inner circumferential surface of the inner layer 8 form a motor stator mounting cavity 27; the motor stator 5 is positioned in the motor stator mounting cavity 27, and the motor stator mounting cavity 27 is not communicated with the working cavity 12; the supporting frame 28 is arranged in the front cover plate 3, the supporting frame 28 and the front cover plate 3 are of an integrated structure, and in order to ensure the coaxiality of the supporting frame 28 and the protrusion 31, the coaxiality between the supporting frame 28 and the fixed shaft support 24 is better and is easier to control, the processing difficulty of parts is relatively lower, the production cost is reduced, and the installation precision of the fixed shaft 22 is also ensured, one end of the fixed shaft 22 is fixed on the supporting frame 28, and the other end of the fixed shaft 22 is fixed on the fixed shaft support 24; the motor rotor yoke 23 is rotationally connected to the fixed shaft 22, the motor rotor yoke 23 is connected with the impeller 2, and the motor rotor yoke 23 drives the impeller 2 to rotate together; thus, the installation of the dead axle 22 is simple, and the requirement for the machining precision of each part is relatively low.

A bearing bush 29 is arranged between the motor rotor yoke 23 and the fixed shaft 22 for connection, two bearing bushes 29 are connected in series on the fixed shaft 22, the two bearing bushes 29 are respectively positioned near two ends of the motor rotor yoke 23, the motor rotor yoke 23 is well supported and can bear large impact force, and meanwhile, the motor rotor yoke 23 has good stability in rotation and can play a good role in damping and noise elimination; the dead axle 22 and the dead axle support 24 are integrally cast or injection molded (which molding mode is specifically adopted and is determined according to materials), so that the coaxiality of the dead axle 22 and the pump body 1 is better controlled, the influence of machining errors on the installation of the dead axle 22 is reduced, the installation accuracy of the motor rotor yoke 23 and the impeller 2 is ensured, and the shock absorption and noise elimination effects can be achieved.

As shown in fig. 8, two glue filling holes 30 are formed in the rear cover plate 13, the two glue filling holes 30 are located on two sides of the water outlet pipe 14, the positive and negative poles of the motor stator 5 are respectively led out from the two glue filling holes 30, and the glue filling holes 30 are communicated with the motor stator installation cavity 27; during assembly, after the motor stator 5 is installed, the motor stator installation cavity 27 is subjected to glue filling treatment through the glue filling holes 30, so that the motor stator 5 can be fixed after the glue filling, the moisture and electricity preventing effects can be achieved, the service life of equipment can be prolonged, and the use safety of the equipment can be improved; and because the inner layer 8 of the pump body 1 is coated by water flow, even if the motor stator 5 is filled with glue, heat is easily taken away by the water flow, and the equipment is ensured to be in a more reasonable temperature range when the equipment works.

An annular bulge 31 is arranged on the end face of one end, close to the shell 19, of the front cover plate 3, the bulge 31 is inserted in the shell 19, and the end face of the bulge 31 is attached to the end face of the flow guide ring 11; during the assembly, peg graft on shell 19 with protruding 31, because the pump body 1 is cup jointed in shell 19, so through the machining precision of control arch 31, can improve the axiality between dead axle support 24 and the support frame 28 to protruding 31 has still played certain limiting displacement to the O type sealing washer, and the difficult condition that appears removing or drop of O type sealing washer during the feasible equipment, thereby improves the packaging efficiency.

One end of the impeller 2 far away from the motor rotor 6 is rotationally connected with the front cover plate 3; a wear-resistant ring is also arranged between the impeller 2 and the front cover plate 3; make the both ends of impeller 2 all have the support, the intensity of equipment back impeller 2 is higher, and impeller 2 just also is difficult for the vibration at the during operation, just also better to the acting of rivers, not only can play the effect of making an uproar falls in the damping, still can improve water efficiency.

As shown in fig. 6 and 7, a plurality of supporting sheets 32 are arranged between the inner layer 8 and the outer layer 9 for connection, and the plurality of supporting sheets 32 are uniformly distributed along the circumferential direction; the support sheet 32 is a straight strip-shaped structure, the support sheet 32 is arranged like a spoke, the length of the support sheet 32 is smaller than that of the first channel 10, and the support sheet 32 is located in the middle position of the first channel 10 in the axial direction, namely, two ends of the support sheet 32 are all located in the first channel 10, water flow at the front end is converged at the rear end after being divided by the support sheet 32, so that the limiting effect on circumferential rotation of the water flow is better, the beam effect is obvious, the consumption of water flow energy is relatively smaller, and the water outlet efficiency at the water outlet pipe 14 is relatively higher.

The present invention has been described in detail, and the principle and the embodiments of the present invention are explained in detail by using specific examples, which are only used to help understanding the present invention and the core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a low vibration shielding formula circulating pump, includes the pump body (1), impeller (2) and front shroud (3), be equipped with motor stator (5) and electric motor rotor (6) in the pump body (1), and electric motor rotor (6) are connected its characterized in that with impeller (2) transmission: a water inlet pipe (7) is arranged on the front cover plate (3), the pump body (1) comprises an inner layer (8) and an outer layer (9), and a first channel (10) is formed between the inner layer (8) and the outer layer (9); a flow guide ring (11) is arranged between the front cover plate (3) and the pump body (1), the impeller (2) is positioned in a working cavity (12) formed by the front cover plate (3) and the flow guide ring (11), and the working cavity (12) is communicated with the first channel (10) through the flow guide ring (11); a rear cover plate (13) is arranged at one end, far away from the front cover plate (3), of the pump body (1), a water outlet pipe (14) is arranged on the rear cover plate (13), the water outlet pipe (14) is communicated with the first channel (10), and the water outlet pipe (14) is parallel to the water inlet pipe (7) or is on the same axis; the guide ring (11) comprises an inner ring (15) and an outer ring (16), a guide channel (17) is formed between the inner ring (15) and the outer ring (16), a plurality of guide blades (18) are arranged in the guide channel (17), the guide blades (18) are uniformly distributed along the circumferential direction, the inner sides of the guide blades (18) are connected with the inner ring (15), and the outer sides of the guide blades (18) are connected with the outer ring (16); the included angle between one end of the guide vane (18) close to the impeller (2) and one end face of the guide ring (11) close to the impeller (2) is an acute angle, and the included angle between one end of the guide vane (18) close to the pump body (1) and one end face of the guide ring (11) close to the pump body (1) is a right angle.

2. The low vibration shield type circulation pump according to claim 1, wherein: the projection parts of two adjacent guide vanes (18) on the same cross section on the pump body (1) are overlapped.

3. The low vibration shield type circulation pump according to claim 1, wherein: the pump further comprises a shell (19), the shell (19) is sleeved on the outer sides of the rear cover plate (13), the pump body (1) and the flow guide ring (11), and the shell (19) is connected with the front cover plate (3); the shell (19) is provided with a through hole (20) extending out of the water supply and outlet pipe (14), and sealing elements (21) are arranged between the shell (19) and the front cover plate (3) and between the shell (19) and the rear cover plate (13) for sealing.

4. The low vibration shielded circulation pump of claim 1, wherein: the motor rotor (6) comprises a fixed shaft (22) and a motor rotor yoke (23); a cylindrical fixed shaft support (24) is arranged in the pump body (1), one end of the fixed shaft support (24) is open, and the other end of the fixed shaft support (24) is sealed; one end of the opening of the fixed shaft bracket (24) is connected with the inner layer (8) of the pump body (1); a connecting part (25) of a protrusion (31) is arranged on the end face of one end, connected with the pump body (1), of the rear cover plate (13), the front end of the connecting part (25) is inserted into the inner layer (8) of the pump body (1), the end face of the outer layer (9) of the pump body (1) is attached to the end face of the rear cover plate (13), a drainage channel (26) is arranged on the side wall of the connecting part (25), and the drainage channel (26) is used for communicating the first channel (10) with the water outlet pipe (14); the outer circumferential surface of the fixed shaft bracket (24) and the inner circumferential surface of the inner layer (8) form a motor stator mounting cavity (27); the motor stator (5) is positioned in the motor stator mounting cavity (27), and the motor stator mounting cavity (27) is not communicated with the working cavity (12); a support frame (28) is arranged in the front cover plate (3), one end of the fixed shaft (22) is fixed on the support frame (28), and the other end of the fixed shaft (22) is fixed on the fixed shaft bracket (24); the motor rotor yoke (23) is rotationally connected to the fixed shaft (22), and the motor rotor yoke (23) is connected with the impeller (2).

5. The low vibration shielded circulation pump of claim 4, wherein: a bearing bush (29) is arranged between the motor rotor yoke (23) and the fixed shaft (22) for connection; the fixed shaft (22) and the fixed shaft bracket (24) are integrally formed.

6. The low vibration shielded circulation pump of claim 4, wherein: and a glue filling hole (30) is formed in the rear cover plate (13), and the glue filling hole (30) is communicated with the motor stator mounting cavity (27).

7. The low vibration shield type circulation pump according to claim 3, wherein: the end face of one end, close to the shell (19), of the front cover plate (3) is provided with an annular bulge (31), the bulge (31) is inserted into the shell (19), and the end face of the bulge (31) is attached to the end face of the flow guide ring (11).

8. The low vibration shielded circulation pump of claim 1, wherein: and one end of the impeller (2) far away from the motor rotor (6) is rotationally connected with the front cover plate (3).

9. The low vibration shielded circulation pump of claim 8, wherein: and a wear-resistant ring is arranged between the impeller (2) and the front cover plate (3).

10. The low vibration shielded circulation pump of claim 1, wherein: a plurality of supporting sheets (32) are arranged between the inner layer (8) and the outer layer (9), and the supporting sheets (32) are uniformly distributed along the circumferential direction; the support sheet (32) is of a straight strip structure, the length of the support sheet (32) is smaller than that of the first channel (10), and the support sheet (32) is located in the middle of the first channel (10) in the axial direction.