CN115614301A - Low-vibration turbine provided with bearing part between impeller and fan member - Google Patents

Abstract

The present invention relates to a low-vibration turbine provided with a bearing portion between an impeller and a fan member, comprising: a motor section; a front end part which is arranged on the front side of the motor part and discharges the fluid after passing through; a rear end portion provided on a rear surface side of the motor portion, and discharging an inflow fluid after passing therethrough; a front end side bearing part which is provided between the motor part and the front end part and applies a rotating force to the front end side impeller when the motor part operates; and a rear end side bearing portion provided between the motor portion and the rear end portion, and applying a rotational force to the rear end side impeller when the motor portion operates, the rear end side bearing portion including: a fan housing coupled to a rear surface side of the motor unit; a rear end side shaft rotatably coupled to a rear surface side of the motor section; a rear end shaft connecting the motor part and the rear end side impeller to apply a rotational force; a fan member inserted into the rear end shaft and surrounding an outer peripheral surface of the rear end shaft; and a rear-end-side bearing provided between the fan member and the rear-end-side impeller and supporting an outer peripheral surface of the rear-end-side shaft.

Description

Low-vibration turbine having bearing part between impeller and fan member

Technical Field

The present invention relates to a low-vibration turbine provided with a bearing portion between an impeller and a fan member.

More particularly, the present invention relates to a low-vibration turbine provided with a bearing portion between an impeller and a fan member, which prevents direct contact between the impeller and the fan member through a rear-end bearing portion, and supports a rear-end shaft by the rear-end bearing to minimize the length of the rear-end shaft, thereby reliably reducing vibration and noise, and eliminating unnecessary components to reduce weight, and minimizing power consumption.

Background

Generally, a general name of an electric Pump for Water (Water Motor Pump) which is mainly suitable for transporting a liquid containing foreign substances and is easy to maintain due to a simple structure is classified into various types according to uses such as deep well, tap Water pressurization, and drainage, and is mainly used for treating or draining sewage and filth such as pumping stored Water to a high position.

That is, the underwater electric pump is a pump mainly used for pumping muddy water mixed with sand and soil, is provided with a suction port for sucking water and a discharge port adaptor for discharging the water sucked through the suction port to the outside, and includes a lower housing having an impeller built therein, a motor frame connected to the lower housing and having a motor rotatably axially provided therein by being connected to the impeller, and an upper cover connected to the motor frame and having a bearing axially provided therein for connecting the impeller and the motor.

Here, a suction port is formed at a lower portion of the lower case to suck water, and a discharge pipe for discharging water to the outside is fastened and fixed to the discharge port adapter.

On the other hand, such an in-water electric pump is configured such that a connecting shaft connecting an impeller and a motor is supported by a bearing, and conventionally, a separate housing (upper cover) for fixing the bearing is required, and thus there is a problem that the weight of the in-water electric pump increases and the manufacturing cost increases due to the addition of unnecessary members.

Further, when a hot air fan member for cooling the motor is provided outside the connecting shaft supported by the bearing, there is a problem that more vibration is generated than when the fan and the impeller are provided adjacent to each other and driven (rotated).

Further, since it is necessary to dispose both the fan and the impeller outside the connecting shaft supported by the bearing, as the length of the connecting shaft becomes longer, more vibration is generated than when the connecting shaft rotates, and thus there is a problem that the efficiency of the motor is lowered.

Documents of the prior art

Patent document

Patent document 1: korean granted patent publication No. 10-1536549 (2015.07.07)

Disclosure of Invention

Technical problem

The present invention has been made to solve the above problems, and an object of the present invention is to provide a low-vibration turbine in which a bearing portion is provided between an impeller and a fan member, the rear-end-side bearing provided between the rear-end-side impeller and the fan member prevents the rear-end-side impeller and the fan member from directly contacting each other, and the rear-end-side shaft is supported by the rear-end-side bearing to minimize the length of the rear-end shaft, thereby reliably reducing vibration and noise, eliminating unnecessary members to reduce weight, and minimizing power consumption.

Another object of the present invention is to provide a low-vibration turbine including a bearing portion between an impeller and a fan member, in which a rear-end bearing adjacent to a motor portion in a conventional turbine structure is moved to a rear side so as to be adjacent to a rear-end impeller, that is, the rear-end bearing adjacent to the motor portion is disposed so as to be separated from the motor portion toward the rear side, thereby minimizing the length of a rear-end shaft, minimizing the generation of vibration, and enabling the motor to rotate stably.

Another object of the present invention is to provide a low-vibration turbine including a bearing portion between an impeller and a fan member, wherein the fan member located on a front side of a rear-end-side bearing can be disposed adjacent to a motor portion, thereby eliminating a member (bearing bracket) for supporting the fan member in the related art to reduce the weight, and further, the temperature of the motor can be more effectively reduced as the fan member is disposed adjacent to a stator, thereby minimizing the reduction in the life of the motor and improving the performance.

Technical scheme

In order to solve the above-described problem, the present invention provides a low-vibration turbine including a bearing portion provided between an impeller and a fan member, the low-vibration turbine including: a motor section; a front end portion provided on a front surface side of the motor portion, and discharging a fluid that flows in from outside by an operation of the front-end-side impeller; a rear end portion provided on a rear surface side of the motor portion, and discharging a fluid flowing from outside by an operation of the rear-end-side impeller; a front end side bearing portion which is provided between the motor portion and the front end portion and applies a rotational force to the front end side impeller when the motor portion operates; and a rear-end side bearing portion that is provided between the motor portion and the rear end portion and applies a rotational force to the rear-end side impeller when the motor portion operates, and that includes: a fan housing coupled to a rear end side of the motor unit; a rear end side shaft which penetrates the ventilation fan housing and is rotatably coupled to the rear side of the motor unit; a rear end shaft connecting the motor part and the rear end side impeller to apply a rotational force; a fan member inserted into the rear end shaft and provided so as to surround an outer peripheral surface of the rear end side shaft; and a rear-end-side bearing provided between the fan member and the rear-end-side impeller and supporting an outer peripheral surface of the rear-end-side shaft, thereby solving the technical problem.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention has a remarkable effect in that the rear-end side impeller and the fan part are prevented from being directly contacted by the rear-end side bearing provided therebetween, and the rear-end side shaft is supported by the rear-end side bearing to minimize the length of the rear-end shaft, so that it is possible to reliably reduce vibration and noise, and eliminate unnecessary components to reduce weight, and minimize power consumption.

Further, the present invention has a significant effect that the length of the rear end shaft can be minimized, the generation of vibration can be minimized, and the motor can be stably rotated by moving the position of the rear end side bearing adjacent to the motor portion in the conventional turbine structure to the rear side so as to be adjacent to the rear end side impeller, that is, by providing the rear end side bearing originally adjacent to the motor portion to be distant from the motor portion to the rear side.

Further, the present invention has a remarkable effect that the fan member positioned at the front side of the rear end side bearing can be provided adjacent to the motor part, so that a member (bearing holder) for supporting the fan member in the past can be eliminated to reduce the weight, and further, as the fan member is provided adjacent to the stator, the temperature of the motor can be more effectively reduced, so that the degree of life reduction of the motor can be minimized, and the performance can be improved.

Drawings

Fig. 1 is a perspective view of a low-vibration turbine according to the present invention, in which a bearing portion is provided between an impeller and a fan member.

Fig. 2 is a rear side sectional view of a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member.

Fig. 3 is a perspective view showing a motor portion in a low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

Fig. 4 is an exploded perspective view showing a motor part in a low-vibration turbine of the present invention provided with a bearing part between an impeller and a fan member.

Fig. 5 is a rear side sectional view showing a motor portion in a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 6 is a perspective view showing a tip end portion in a low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

Fig. 7 is an exploded perspective view showing a front end portion of a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 8 is a rear side sectional view showing a tip end portion of a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 9 is a perspective view showing a rear end portion in a low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

Fig. 10 is an exploded perspective view showing a rear end portion in a low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

Fig. 11 is a rear side sectional view showing a rear end portion of a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 12 is a perspective view showing a front end side bearing portion in a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 13 is an exploded perspective view showing a front end side bearing portion in a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member.

Fig. 14 is a rear sectional view showing a front end side bearing portion in a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 15 is a perspective view showing a rear end side bearing portion in a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member.

Fig. 16 is an exploded perspective view showing a rear end side bearing portion in a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member.

Fig. 17 is a rear side sectional view showing a rear end side bearing portion in a low-vibration turbine provided with a bearing portion between an impeller and a fan member according to the present invention.

Fig. 18 is a back side sectional view showing a fan case in a low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

Fig. 19 is a rear-end-side cross-sectional view showing a rear-end-side shaft in a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member.

Fig. 20 is a side-surface-side partial sectional view showing an example in which a motor portion is cooled by the flow of air in the low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

Reference numerals

100: motor portion, 110: rotor, 120: stator coil, 130: stator core, 140: cooling rack, 150: motor mount, 151: injection hole, 160: injection port, 200: front end, 210: front end side back plate, 220: front end side scroll, 230: front end side shield, 240: front-end-side impeller, 250: front end side flowmeter, 300: rear end portion, 310: rear end side back plate, 320: rear end side scroll, 330: rear end side shield, 340: rear-end-side impeller, 350: rear end side flowmeter, 400: front end side bearing portion, 410: bearing support, 420: front-end-side shaft, 430: front end shaft, 440: front end side bearing, 500: rear end side bearing portion, 510: fan housing, 511: plate-shaped portion, 511a: through-hole, 511b: inclined surface, 511c: introduction of the projection, 512: annular extension, 512a: side opening hole, 513: plate-shaped connecting portion, 520: rear end side shaft, 521: fan support portion, 522: bearing support portion, 523: impeller supporting portion, 530: rear end shaft, 531: impeller nut, 532: nose cone, 540: fan component, 541: gasket, 550: rear end side bearing, 551: bearing housing cover, 560: discharge port, 600: a thrust disk.

Detailed Description

Advantages and features of embodiments of the present invention, and methods of attaining the advantages and features, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms different from each other, which are provided only for completeness of disclosure of the present invention and informing a general person skilled in the art of the present invention of the scope of the present invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing the embodiments of the present invention, when it is judged that detailed description of known functions or elements may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms or words used in the present specification and claims are terms defined in consideration of functions in the embodiments of the present invention, and should not be construed as being limited to meanings of general dictionaries, but should be construed as meanings and concepts conforming to technical ideas of the present invention on the basis of the principle that the inventor can appropriately define concepts of the terms in order to explain his own invention in an optimal manner.

Therefore, the embodiments described in the present specification and the members shown in the drawings are only the most preferable embodiments of the present invention and do not represent the entire technical idea of the present invention, and therefore, it is understood that various equivalents and modifications that can replace the embodiments may exist at the time of the present application.

Before proceeding with the following description with reference to the drawings, it is noted that well-known elements, which are not necessary to highlight the gist of the present invention, and which can be obviously added by a person of ordinary skill, are not illustrated or specifically described.

Before describing in detail a plurality of embodiments of the present invention with reference to the drawings, it is to be noted that terms such as directions (for example, "front", "rear", "left", "right", "top", "bottom", "upper", "lower", "lateral", "longitudinal", "front", "back", "one side", "the other side", "inner side", "outer side") of constituent elements described in the following detailed description or shown in the drawings do not simply mean or mean specific directions, and such directions are described for the convenience of description between members with reference to the drawings.

The low-vibration turbine of the present invention, which is provided with a bearing portion between the impeller and the fan member, relates to a low-vibration turbine provided with a bearing portion between the fan members, in which the rear-end-side impeller and the fan member are prevented from being in direct contact by the rear-end-side bearing portion 500, and the rear-end-side shaft is supported by the rear-end-side bearing 550 to minimize the length of the rear-end shaft 530, thereby making it possible to reliably reduce vibration and noise, and eliminate unnecessary components to reduce weight, and minimize power consumption.

A low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member is described in detail below with reference to the accompanying drawings.

Fig. 1 is a perspective view of a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member, and fig. 2 is a rear side sectional view of the low-vibration turbine of the present invention in which the bearing portion is provided between the impeller and the fan member.

The invention provides a low-vibration turbine provided with a bearing part between an impeller and a fan component, which relates to a low-vibration turbine provided with a bearing part between an impeller and a fan component, capable of improving the problem of excessive power consumption caused by excessive vibration continuously generated in the conventional turbine structure and improving the efficiency by reducing the weight, and is configured to comprise a motor part 100, a front end part 200, a rear end part 300, a front end side bearing part 400, a rear end side bearing part 500 and a thrust plate 600.

Fig. 3 is a perspective view showing a motor portion in a low-vibration turbine in which a bearing portion is provided between an impeller and a fan member according to the present invention, fig. 4 is an exploded perspective view showing the motor portion in the low-vibration turbine in which the bearing portion is provided between the impeller and the fan member according to the present invention, and fig. 5 is a rear side sectional view showing the motor portion in the low-vibration turbine in which the bearing portion is provided between the impeller and the fan member according to the present invention.

The motor unit 100 functions as a motor for obtaining a rotational force by using power, and is provided at the center thereof with a front end 200 provided with a front-end impeller 240 on the front side and a rear end 300 provided with a rear-end impeller 340 on the rear side.

Such a motor section 100 is configured to include a rotor 110, a stator coil 120, a stator core 130, a cooling frame 140, and a motor frame 150.

The rotor 110 is rotatably disposed inside.

It is preferably provided in an inner space of the motor frame 150 to be described later in a shaft-rotatable manner, and is provided to share a rotation shaft with the front-end-side impeller 240 and the rear-end-side impeller 340 provided on the front surface side and the rear surface side, respectively.

In this case, when the rotor 110 is described with reference to fig. 5, the intermediate side is formed of a magnet, and rotor covers (not shown) for finishing are disposed on the front side and the back side with reference to the magnet, respectively, and the lengths of the front side and the back side of the rotor cover on the back side may be formed longer than the lengths of the front side and the back side of the rotor cover on the front side. That is, as shown in fig. 5, the rotor cover positioned on the back side is formed to have a long length and an asymmetric shape with respect to the center of the rotor 110, so that the rear-end-side impeller 340 and the fan member 540 to be described later can be disposed closer to the rotor 110, thereby minimizing vibration and power consumption.

As described with reference to fig. 3 to 5, stator coil 120 is provided on the outer peripheral surface of rotor 110, and is wound around stator core 130.

Stator core 130 is provided to wind stator coil 120 so as to surround the outer circumferential surface of rotor 110.

As described with reference to fig. 4, such a stator core may be provided by a plurality of teeth arranged to be spaced apart from each other in a circumferential direction to be projected toward a central axis.

The cooling frame 140 is provided to surround the outer circumferential surface of the stator core 130.

The motor frame 150 functions as a cylindrical object having a housing space provided therein so as to include the rotor 110, the stator coil 120, the stator core, and the cooling frame 140.

In this case, as described with reference to fig. 4, the motor holder 150 may have an injection hole 151 formed in a side surface thereof to communicate with the outside.

The injection hole 151 performs a function of cooling heat when the motor unit 100 operates by allowing external air to flow into the internal space of the motor unit 100.

The injection port 160 having a plurality of holes may be formed along the inner circumferential surface of the motor frame 150 to be adjacent to the inner circumferential surface of the motor frame 150 according to design conditions.

Such an injection port 160 may pass air flowing into the inner space of the motor part 100 through the injection hole 151 of the motor frame 150, and guide the air flowing in through a plurality of holes formed spaced apart from each other in the circumferential direction to be separately dispersed and supplied to the entire space inside the motor part 100.

Fig. 6 is a perspective view showing a front end portion in a low-vibration turbine in which a bearing portion is provided between an impeller and a fan member according to the present invention, fig. 7 is an exploded perspective view showing the front end portion in the low-vibration turbine in which the bearing portion is provided between the impeller and the fan member according to the present invention, and fig. 8 is a rear side sectional view showing the front end portion in the low-vibration turbine in which the bearing portion is provided between the impeller and the fan member according to the present invention.

The tip 200 is provided on the front surface side of the motor 100, performs a function of discharging a fluid flowing from the outside by the operation of the tip impeller 240 after passing therethrough, and is configured to include a tip back plate 210, a tip scroll 220, a tip shroud 230, a tip impeller 240, and a tip flowmeter 250.

The front end back plate 210 is provided on the front side of the motor section 100, and is preferably coupled to the front side of a front end bearing section 400 to be described later.

The front end back plate 210 is formed in a plate shape so that the members of the front end portion 200 can be stably provided on the front side of the motor portion 100, and can be provided by being bolt-coupled to the motor frame 150 and the front end side bearing portion 400 of the motor portion 100.

In this case, the front-side back plate 210 may be disposed so as to penetrate through the front and back sides, and the front shaft 430 of the front-side bearing 400 to be described later may penetrate therethrough. Therefore, the front end shaft 430 penetrates through the penetrating space of the front end back plate 210, and the front end impeller 240 can be disposed by rotatably connecting the front end shaft 430 to the motor unit 100.

The front-side scroll 220 is coupled to the front side of the front-side back plate 210, and is formed in a scroll shape so as to communicate with the outside.

As described with reference to fig. 8, the tip-side scroll 220 may have a spiral shape, and the cross-sectional area may be gradually increased as the distance from the discharge port communicating with the outside increases.

Accordingly, when the front-end impeller 240 to be described later rotates, the fluid sucked from the outside is moved to the inner space of the front-end scroll 220, moved to the side where the sectional area is gradually increased, and discharged to the outside through the discharge port.

The front-end shroud 230 is provided on the front side of the front-end scroll 220, and is provided between a front-end flowmeter 250 to be described later and the front-end scroll 220 to provide a space in which fluid moves.

At this time, as shown in fig. 8, the tip shroud 230 is formed in a shape in which a part of a tip impeller 240 to be described later is inserted, and the inner peripheral surface may be formed in a curved shape so as to correspond to the shape of the tip impeller 240.

The front-end impeller 240 is provided between the front-end back plate 210 and the front-end shroud 230, and rotates together when the motor unit 100 rotates.

Such a front-end impeller 240 performs a function of generating a flow motion of a fluid flowing in through a front-end flowmeter 250 to be described later, thereby controlling the flow of the fluid so that the fluid flowing in the front-end flowmeter 250 moves to the outside through the front-end volute 220 via the front-end shroud 230.

In this case, as described with reference to fig. 7 and 8, the front side impeller 240 may be provided with an annular impeller seal 341 in a portion that contacts the front side back plate 210.

The front-end flowmeter 250 is provided on the front side of the front-end shroud 230, and is configured to communicate with the outside.

The front-end flowmeter 250 performs a function of a passage through which a fluid flows from the outside when the front-end impeller 240 operates, and is preferably formed in a circular tube shape, and a tip of the fluid flow may be formed in a funnel shape in which an inner diameter gradually widens toward the outside so that the fluid flows more smoothly.

According to this arrangement, when the motor unit 100 is operated, the tip 200 rotates together with the tip impeller 240 to allow fluid to flow into the tip flowmeter 250, and allows the fluid to flow through the tip shroud 230 and to be discharged to the outside through the tip scroll 220.

Fig. 9 is a perspective view showing a rear end portion in a low-vibration turbine in which a bearing portion is provided between an impeller and a fan member according to the present invention, fig. 10 is an exploded perspective view showing the rear end portion in the low-vibration turbine in which the bearing portion is provided between the impeller and the fan member according to the present invention, and fig. 11 is a rear side sectional view showing the rear end portion in the low-vibration turbine in which the bearing portion is provided between the impeller and the fan member according to the present invention.

The rear end 300 is provided on the rear surface side of the motor unit 100, performs a function of discharging a fluid flowing from the outside by the operation of the rear side impeller 340 after passing therethrough, and is configured to include a rear side back plate 310, a rear side scroll 320, a rear side shroud 330, a rear side impeller 340, and a rear side flowmeter 350.

As shown in the drawing, the rear end 300 and the front end 200 are provided on the front surface side and the rear surface side of the motor unit 100, respectively, and have symmetrical structures.

In this case, the front end portion 200 and the rear end portion 300 may be formed to have the same configuration, and preferably, a front end side bearing portion 400 to be described later is provided between the motor portion 100 and the front end portion 200, and a rear end side bearing portion 500 to be described later is provided between the motor portion 100 and the rear end portion 300, so that the front end portion 200 and the rear end portion 300 are arranged to perform the same function.

The rear end back plate 310 is provided on the rear surface side of the motor portion 100, and is preferably coupled to the rear surface side of the fan housing 510 of the rear end bearing portion 500 to be described later.

Such a rear-end back plate 310 is formed in a plate shape so that a member of the rear end portion 300 can be stably provided on the rear side of the motor portion 100, and can be provided by being bolt-coupled to the rear-end bearing portion 500.

In this case, the rear-end back plate 310 may be disposed so as to penetrate through the front and rear sides, and the rear shaft 530 of the rear-end bearing 500 to be described later may penetrate therethrough. Accordingly, the rear end shaft 530 penetrates through the penetrating space of the rear end back plate 310, and the rear end impeller 340 is rotatably connected to the motor unit 100 by the rear end shaft 530.

The rear scroll 320 is provided on the rear surface side of the rear backplate 310, and is formed in a scroll shape so as to communicate with the outside.

As described with reference to fig. 11, the rear-end scroll 320 may have a scroll shape, and the cross-sectional area may be gradually increased as the rear-end scroll is closer to the discharge port communicating with the outside.

Accordingly, when the rear-end impeller 340 to be described later rotates, the fluid sucked from the outside is moved to the inner space of the rear-end scroll 320, moved to the side where the sectional area gradually increases, and discharged to the outside through the discharge port.

The rear-end-side shroud 330 is provided on the rear side of the rear-end-side scroll 320, and is provided between a rear-end-side flowmeter 350 to be described later and the rear-end-side scroll 320 to provide a space in which the fluid moves.

At this time, as shown in fig. 11, the rear shroud 330 is formed in a shape in which a part of a rear impeller 340 to be described later is inserted, and an inner peripheral surface may be formed in a curved shape so as to correspond to the shape of the rear impeller 340.

The rear impeller 340 is provided between the rear back plate 310 and the rear shroud 330, and rotates together when the motor unit 100 rotates.

Such a rear-end impeller 340 performs a function of generating a flow motion of a fluid flowing in through a rear-end flowmeter 350 to be described later, and thereby controls the flow of the fluid so that the fluid flowing into the rear-end flowmeter 350 is moved to the outside through the rear-end volute 320 via the rear-end shroud 330.

In this case, as described with reference to fig. 10 and 11, the rear impeller 340 may be provided with an annular impeller seal 341 in a portion that contacts the rear back plate 310.

The rear-end flowmeter 350 is provided on the rear surface side of the rear-end shroud 330, and is arranged to communicate with the outside.

Such a rear-end-side flow meter 350 performs a function of a passage through which fluid flows from the outside when the rear-end-side impeller 340 is operated, and is preferably formed in a circular tube shape, and a tip of the fluid inflow may be formed in a funnel shape having an inner diameter gradually widened toward the outside so that the fluid flows more smoothly.

According to this arrangement, when the motor unit 100 is operated, the rear end 300 rotates together with the rear end impeller 340 to allow fluid to flow in from the rear end flowmeter 350, and allows the fluid to flow through the rear end shroud 330 and to be discharged to the outside through the rear end scroll 320.

Fig. 12 is a perspective view showing a front-end side bearing portion in a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member, fig. 13 is an exploded perspective view showing the front-end side bearing portion in the low-vibration turbine of the present invention in which a bearing portion is provided between the impeller and the fan member, and fig. 14 is a rear side sectional view showing the front-end side bearing portion in the low-vibration turbine of the present invention in which a bearing portion is provided between the impeller and the fan member.

The front end bearing 400 is provided between the motor 100 and the front end 200, performs a function of applying a rotational force to the front end impeller 240 when the motor 100 operates, and is configured to include a bearing holder 410, a front end shaft 420, a front end shaft 430, and a front end bearing 440.

The bearing holder 410 is coupled to the front side of the motor unit 100.

As described with reference to fig. 13, the bearing holder 410 is formed to have a front side and a back side penetrating therethrough, and a front side bearing 440 to be described later is provided in the penetrating space.

At this time, the bearing holder 410 is provided by being bolted to the front surface side of the motor frame 150 of the motor unit 100, and blocks the space of the opening on the front surface side of the motor frame 150.

The front end shaft 420 is rotatably coupled to the front side of the motor unit 100 through the bearing bracket 410.

Such a front end side shaft 420 is configured to be coupled to share a rotational force in a manner of surrounding an outer peripheral surface of a front end shaft 430 to be described later.

The rear side of the front end shaft 430 is connected to the motor unit 100, the front side is exposed through the bearing holder 410, and the exposed portion is coupled to the front end impeller 240.

Accordingly, when the motor unit 100 operates, the front-end impeller 240 connected to the front-end shaft 430 is rotated.

In this case, when the tip of the tip shaft 430 is described with reference to fig. 14, a screw may be formed in a part of the tip to fasten an impeller nut 531 for fixing the tip impeller 240 to the tip shaft 430.

Further, the tip of the front end shaft 430 is provided with a nose cone 532 for coupling to finish the tip of the front end shaft 430, thereby performing a function of preventing the front end shaft 430 from being separated to the outside even if the front end side impeller 240 continues to rotate and preventing the front end shaft 430 from being exposed to a space into which a fluid flows.

The front-end-side bearing 440 is provided so as to surround the outer peripheral surface of the front-end-side shaft 420, and performs a function of rotatably supporting the front-end-side shaft 420.

It is possible to minimize friction during rotation of the front side shaft 420 by such a front side bearing 440 and reduce generation of vibration and noise.

At this time, the front end side bearing 440 may be provided with a bearing housing cover 551 supporting the front end side bearing 440 on the front surface side and the back surface side, respectively.

Such a bearing housing cover 551 is formed in a ring shape, and is provided to be inserted into the outer peripheral surface of the front end side shaft 420, and is bonded to the front and back sides of the front end side bearing 440 to perform a function of protecting the front end side bearing 440.

Fig. 15 is a perspective view showing a rear-end side bearing portion in a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member, fig. 16 is an exploded perspective view showing the rear-end side bearing portion in the low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member, fig. 17 is a back-side sectional view showing the rear-end side bearing portion in the low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member, fig. 18 is a back-side sectional view showing a fan housing in the low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member, and fig. 19 is a back-side sectional view showing a rear-end side shaft in the low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member.

Rear-end bearing 500 is provided between motor 100 and rear end 300, performs a function of applying a rotational force to rear-end impeller 340 when motor 100 operates, and is configured to include a fan housing 510, a rear-end shaft 520, a rear-end shaft 530, a fan member 540, a rear-end bearing 550, and a discharge port 560.

The rear-end bearing 500 is coupled to the rear side of the motor 100 so as to be symmetrical to the front-end bearing 400, and is further provided with a fan member 540 for cooling the internal space of the motor 100 to guide the flow of air, thereby performing a function of reducing the temperature of heat generated in the motor 100.

The fan housing 510 is coupled to the rear surface side of the motor part 100, and is configured to include a plate-shaped portion 511, an annular extension 512, and a plate-shaped extension 513.

Such a fan case 510 may be formed to penetrate the front side and the back side so as to penetrate a rear end shaft 530 to be described later. Therefore, a rear end shaft 530 to be described later is inserted through a space through which the rear end back plate 310 and the fan housing 510 are inserted, and the rear end impeller 340 is rotatably connected to the motor unit 100 via the rear end shaft 530.

The plate-shaped portion 511 is located on the front side of the fan case 510, and as described with reference to fig. 16 and 18, a through hole 511a that penetrates the front side and the back side is formed, and the through hole 511a allows a rear end shaft 520 and a rear end shaft 530, which will be described later, to penetrate therethrough and provides a space in which the fan member 540 is located.

The plate-shaped portion 511 is formed in a plate shape and may be provided by being bolt-coupled to the rear surface side of the motor frame 150 of the motor portion 100.

At this time, as shown in fig. 18, the through hole 511a of the plate-shaped portion 511 may be configured to include a part of the fan member 540 to be described later, and include an inclined surface 511b having a shape in which the diameter gradually increases from the front side toward the rear side so as to correspond to the outer peripheral surface of the fan member 540.

At this time, the plate-shaped portion 511 may be formed with a drawing protrusion 511c in a form exposed to the outside at the front side.

Such a drawing protrusion 511c allows the drawing protrusion 511c to be drawn into the inner space of the motor frame 150 in the process of coupling the plate-shaped portion 511 to the rear surface side of the motor frame 150 of the motor unit 100, so that it is possible to minimize the generation of vibration due to play between members when the motor unit 100 operates.

Of course, the outer diameter of the introduction protrusion 511c may be formed to be the same as the inner diameter of the motor frame 150 according to design conditions.

The annular extension portion 512 is formed to extend toward the rear surface side along the outer peripheral edge of the plate portion 511, and is provided with an accommodation space therein.

In such a housing space, a space in which the rear end shaft 520 and the rear end shaft 530 to be described later are located is provided, and when the fan member 540 is operated, the air in the motor unit 100 is moved to the housing space by the fan member 540 in the process of moving to the rear side, and then is discharged to the outside.

At this time, the receiving space in the annular extension portion 512 allows the hot air in the motor portion 100 to be discharged to the outside after moving to the rear side by the operation of the fan member 540, and preferably, a side surface opening hole 512a penetrating to communicate with the outside is formed in a part of the side surface of the annular extension portion 512. Further, the side opening hole 512a may be configured to be combined with an exhaust opening 560 to be described later so that air is exhausted to the outside through the exhaust opening 560.

The plate-shaped extension 513 is formed to extend outward along the outer peripheral edge of the annular extension 512.

Such plate-shaped extensions 513 may be disposed on the front side of the rear end-side back plate 310 of the rear end portion 300, and be disposed to be bolt-coupled to each other.

The rear end side shaft 520 is rotatably coupled to the rear surface side of the motor unit 100 through the ventilation fan housing 510, and includes a fan support portion 521, a bearing support portion 522, and an impeller support portion 523.

The fan support 521 is described with reference to fig. 19, and is provided on the front side of the rear end shaft 520 so as to surround the rotor 110 of the motor unit 100 and a part of the outer peripheral surface of the rear end shaft 530 to be described later.

The fan support 521 is coupled to a fan member 540 to be described later on an outer circumferential surface.

Therefore, when the rear end shaft 530 rotates when the motor unit 100 operates, the rear end shaft 520 and the fan member 540 are rotated together to form a flow of air so that the air in the motor unit 100 moves to the rear side, so that the heat in the motor unit 100 can be cooled.

The bearing support portion 522 is formed to extend toward the back side of the fan support portion 521, and is provided to have a rear end side bearing 550 to be described later inserted into the outer circumferential surface.

At this time, as described with reference to fig. 19, the bearing support portion 522 may be formed to have an outer diameter greater than or equal to that of the fan support portion 521.

Preferably, the outer diameter is formed to be larger than that of the fan support 521, so that a boss is formed between the fan support 521 and the bearing support 522, whereby the fan member 540 inserted to surround the fan support 521 can be locked to the boss to prevent the fan member from being pushed to the back side.

The impeller support portion 523 is formed to extend toward the back side of the bearing support portion 522, and is provided in a form in which the rear-end-side impeller 340 is inserted into the outer circumferential surface.

At this time, as described with reference to fig. 18, the bearing support portion 522 may be formed to have an outer diameter smaller than that of the fan support portion 521, and the rear-end impeller 340 may be coupled to an outer circumferential surface thereof so as to share a rotational force.

Accordingly, when the motor unit 100 operates, a rotational force is applied to the rear-end impeller 340, and the rear-end impeller 340 is rotated together.

On the other hand, in the structure of the conventional turbine, the bearing for supporting the rotary shaft and the supporting point for the rotary shaft are formed not only on the front side of the fan member but also on the rear side of the bearing, and the fan member and the impeller are provided, so that the rotary shaft can be configured to have a longer length exposed to the rear side of the bearing.

Thus, in order to solve the problems as described above, if a low-vibration turbine of the present invention in which a bearing portion is provided between an impeller and a fan member is described with reference to fig. 19, the rear-end shaft 520 is provided such that a fan member 540 to be described later is coupled to a fan support portion 521 formed on the front side, a rear-end impeller 340 is coupled to an impeller support portion 523 formed on the rear side, and a rear-end bearing 550 to be described later is supported by a bearing support portion 522 formed between the fan support portion 521 and the impeller support portion 523, whereby the fan member 540 and the rear-end impeller 340 are spaced apart to prevent the fan member 540 and the rear-end impeller 340 rotating with each other from directly contacting each other, and thus vibration and noise can be reliably reduced to minimize power consumption.

Further, as the bearing support portion 522 formed on the back side of the fan support portion 521 is supported by the rear-end side bearing 550 to be described later, a support point for supporting the rear-end side shaft 520 and the rear-end side bearing 550 is formed between the back side of the fan member 540 and the front side of the rear-end side impeller 340, whereby it is possible to minimize the length of the rear-end shaft 530 exposed to the back side of the rear-end side shaft 520, that is, the length of the rear-end shaft 530 exposed to the back side, and thus it is possible to minimize the generation of vibration.

The rear shaft 530 is connected to the motor unit 100 on the front side, passes through the fan housing 510 on the rear side to be exposed, and is coupled to the fan member 540 on the front side, coupled to the rear impeller 340 on the rear side, and coupled to the rear shaft 520 supported by the rear bearing 550 at an intermediate position.

Accordingly, when the motor unit 100 is operated, the rear shaft 520 connected to the rear shaft 530 is rotated while being supported by the rear bearing 550, and the fan member 540 is rotated together with the rear impeller 340.

At this time, the end of the rear end shaft 530 may have the same structure as the end of the front end shaft 430. That is, it may be configured to be threaded at the tip of the rear end shaft 530 to fasten the impeller nut 531, and to be combined with the nose cone 532 for finishing.

The fan member 540 is inserted into the rear end shaft 530 and is disposed so as to surround the outer peripheral surface of the rear end shaft 520.

Specifically, the fan support 521 coupled to the rear shaft 520 is provided to share the rotational force and rotate together when the motor 100 operates.

The fan member 540 causes the outside air flowing into the motor section 100 to pass through the motor section 100 and the fan member 540 in this order, move to the accommodation space provided in the rear end side bearing section 500, and be discharged to the outside through a discharge opening 560 to be described later.

That is, a flow of air passing through the motor part 100 is formed when the fan member 540 rotates, whereby heat of the motor part 100 can be cooled to prevent a problem of overheating.

In this case, as described with reference to fig. 17, the fan member 540 may include a ring-shaped gasket 541 provided to surround a part of the outer circumferential surface of the fan support portion 521.

Such spacers 541 are provided in close contact with each other between the back surface side of the rotor 110 of the motor portion 100 and the front surface side of the fan support 521, and perform a function of restricting the movement of the fan member 540 to the front surface side in the process of moving air from the front surface side to the back surface side when the fan member 540 is rotated.

The rear-end bearing 550 is provided between the fan member 540 and the rear-end impeller 340, is provided so as to surround the outer peripheral surface of the rear-end shaft 520, and performs a function of rotatably supporting the rear-end shaft 520.

Such a rear-end side bearing 550 can minimize friction during rotation of the rear-end side shaft 520 and reduce generation of vibration and noise.

At this time, the rear-end side bearing 550 may be provided with a bearing housing cover 551 on the front side and the back side, respectively, for supporting and protecting the rear-end side bearing 550.

Such a bearing housing cover 551 may be formed in a ring shape and provided to be inserted into the outer peripheral surface of the rear end side shaft 520.

Fig. 20 is a side-surface-side partial sectional view showing an example in which a motor portion is cooled by the flow of air in the low-vibration turbine of the present invention provided with a bearing portion between an impeller and a fan member.

The discharge opening 560 is coupled in such a manner as to communicate with a side opening hole 512a formed at the annular extension part 512 of the fan housing 510 to perform a function of discharging air flowing into the receiving space provided at the fan housing 510 through the discharge opening 560.

That is, the outlet 560 performs a function of discharging air, which flows into the motor part 100 to cool heat of the motor part 100 when the fan member 540 is operated, to the outside after passing through the motor part 100.

According to this arrangement, when an example of cooling the motor part 100 is described with reference to fig. 20, first, when the fan member 540 rotates when the motor part 100 operates, external air flows into the space inside the motor part 100 through the injection port 160, and moves to the rear end side bearing part 500 after passing through the injection port 160 and the injection hole 151 in this order.

Then, after passing through the fan member 540 and moving into the receiving space provided in the annular extension 512, the air passes through the side opening hole 512a of the annular extension 512 and is discharged to the outside through the discharge opening 560.

That is, when the motor unit 100 operates, the fan member 540 is rotated while controlling the flow of the fluid by the rotation of the front-end impeller 240 and the rear-end impeller 340 provided on the front surface side and the rear surface side, respectively, so that the motor unit 100 can be prevented from overheating.

Depending on design conditions, a thrust disk 600 may be provided between the tip end portion 200 and the tip end side bearing portion 400.

The thrust disk 600 is formed so as to penetrate the distal end shaft 430 to the front side and the rear side, and is formed in a plate shape so as to lock the distal end shaft 420 to the rear side.

Accordingly, in the process of moving air from the front side to the back side when the fan member 540 is rotated, the rear end shaft 520 coupled to the fan member 540, the rear end shaft 530 coupled to the rear end shaft 520, the rotor 110 of the motor unit 100 coupled to the rear end shaft 530, and the front end shaft 420 coupled to the front side of the rotor 110 are supported on the front side to prevent the components from moving to the front side, and thus the motor unit 100 can be operated in a stable state.

According to this configuration, the low-vibration turbine of the present invention, which is provided with the bearing portion between the impeller and the fan member, prevents the rear-end side impeller 340 and the fan member 540 from directly contacting by the rear-end side bearing 550 provided between the rear-end side impeller 340 and the fan member 540, and supports the rear-end side shaft 520 by the rear-end side bearing 550 to minimize the length of the rear-end shaft 530, thereby enabling vibration and noise to be reliably reduced, and unnecessary components to be eliminated to reduce weight, and power consumption to be minimized.

Further, by providing the rear-end-side bearing 550 adjacent to the motor portion in the conventional turbine structure so as to be adjacent to the rear-end-side impeller 340 on the rear side, the length of the rear-end shaft 530 can be minimized, and the occurrence of vibration can be minimized.

Further, in the present invention, by moving the position of the rear end side bearing 550 adjacent to the motor section 100 to the rear side so as to be adjacent to the rear end side impeller 340 in the conventional turbine structure, that is, by providing the rear end side bearing 550 originally adjacent to the motor section 100 so as to be away from the motor section 100 toward the rear side, it is possible to minimize the length of the rear end shaft 530, minimize the generation of vibration, and stably rotate the motor.

Further, the fan member 540 positioned on the front side of the rear end side bearing 550 may be disposed adjacent to the motor part 100, so that a member (bearing bracket) for supporting the fan member in the past may be eliminated to reduce the weight, and further, as the fan member 540 is disposed adjacent to the stator (the stator coil 120, the stator core 130), the temperature of the motor is more effectively reduced, so that there is a remarkable effect that the degree of life reduction of the motor can be minimized and the performance can be improved.

While various embodiments of the present invention have been shown and described in the foregoing description, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains will appreciate that various substitutions, modifications and alterations can be made without departing from the scope of the technical spirit of the present invention.

Claims (10)

1. A low-vibration turbine having a bearing portion provided between an impeller and a fan member, comprising:

a motor unit (100);

a tip end section (200) which is provided on the front side of the motor section (100) and which discharges a fluid that flows in from the outside by the operation of a tip-side impeller (240) after passing through the tip end section;

a rear end part (300) which is provided on the rear surface side of the motor part (100) and discharges a fluid which flows in from the outside by the operation of the rear-end-side impeller (340) after passing through the rear end part;

a front end side bearing part (400) which is provided between the motor part (100) and the front end part (200) and applies a rotational force to the front end side impeller (240) when the motor part (100) operates; and

a rear end side bearing part (500) which is provided between the motor part (100) and the rear end part (300), and which applies a rotational force to the rear end side impeller (340) when the motor part (100) is operated, and which applies a rotational force to the rear end side impeller

The rear end side bearing section (500) includes:

a fan case (510) coupled to the rear surface side of the motor unit (100);

a rear end shaft (520) that penetrates the fan case (510) and is rotatably coupled to the rear surface side of the motor unit (100);

a rear end shaft (530) that connects the motor section (100) and a rear end-side impeller (340) to apply a rotational force;

a fan member (540) that is inserted into the rear end shaft (530) and is provided so as to surround the outer peripheral surface of the rear end shaft (520); and

and a rear-end bearing (550) that is provided between the fan member (540) and the rear-end impeller (340), and that supports the outer peripheral surface of the rear-end shaft (520).

2. The low-vibration turbine provided with a bearing portion between an impeller and a fan member according to claim 1,

the motor unit (100) includes:

a rotor (110) which is rotatably disposed inside the motor unit (100);

a stator coil (120) provided on the outer peripheral surface of the rotor (110);

a stator core (130) around which the stator coil (120) is wound;

a cooling frame (140) provided so as to surround an outer peripheral surface of the stator core (130); and

a cylindrical motor holder (150) having a housing space in which the rotor (110), the stator coil (120), the stator core, and the cooling holder (140) can be disposed, and

the front-end bearing section (400) is coupled to the front side of the motor frame (150), and the rear-end bearing section (500) is coupled to the rear side of the motor frame (150).

3. The low-vibration turbine provided with the bearing portion between the impeller and the fan member as claimed in claim 1,

the front end portion (200) includes:

a front end side back plate (210) coupled to the front side of the front end side bearing section (400);

a front scroll (220) coupled to the front side of the front back plate (210) and formed in a scroll shape so as to communicate with the outside;

a tip shroud (230) provided on the front side of the tip scroll (220);

a front-end impeller (240) that is provided between the front-end back plate (210) and the front-end shroud (230), and that rotates together when the motor unit (100) rotates; and

a front end side flowmeter (250) which is provided on the front side of the front end side shroud (230) and into which fluid flows from the outside, and

when the front-end impeller (240) rotates, fluid flowing from a front-end flowmeter (250) flows through the front-end shroud (230) and is discharged to the outside through a front-end scroll (220).

4. The low-vibration turbine provided with the bearing portion between the impeller and the fan member as claimed in claim 3,

the rear end portion (300) includes:

a rear end side back plate (310) coupled to the rear side of the rear end side bearing section (500);

a rear scroll (320) that is joined to the rear surface side of the rear backplate (310) and is formed in a scroll shape so as to communicate with the outside;

a rear-end shroud (330) provided on the rear surface side of the rear-end scroll (320);

a rear-end impeller (340) that is provided between the rear-end back plate (310) and a rear-end shroud (330), and that rotates together when the motor unit (100) rotates; and

a rear-end flowmeter (350) that is provided on the rear surface side of the rear-end shroud (330) and that allows fluid to flow in from the outside, and that is provided on the rear surface side

The fluid flowing in from a rear-end-side flowmeter (350) when the rear-end-side impeller (340) rotates flows through the rear-end-side shroud (330) and is discharged to the outside through a rear-end-side scroll (320),

the front end portion (200) and the rear end portion (300) are arranged to be symmetrical to each other on the front surface side and the rear surface side of the motor portion (100), respectively.

5. The low-vibration turbine provided with a bearing portion between an impeller and a fan member according to claim 1,

the front end side bearing section (400) includes:

a bearing bracket (410) coupled to the front side of the motor unit (100);

a tip-side shaft (420) that penetrates the bearing holder (410) and is rotatably coupled to the front side of the motor unit (100);

a front end shaft (430) that connects the motor section (100) and a front end-side impeller (240) to apply a rotational force; and

and a distal end side bearing (440) that is provided so as to surround the outer peripheral surface of the distal end side shaft (420) and that supports the outer peripheral surface of the distal end side shaft (420) so as to be rotatable.

6. The low-vibration turbine provided with the bearing portion between the impeller and the fan member as claimed in claim 1,

the fan housing (510) includes:

a plate-shaped part (511) that is joined to the back side of the motor part (100);

an annular extension part (512) which is formed in a shape extending to the back surface side along the outer peripheral edge of the plate-shaped part (511) and is internally provided with an accommodating space; and

a plate-shaped extension part (513) which is formed in a shape extending outward along the outer peripheral edge of the annular extension part (512), is coupled to the rear end part (300), and is provided with a groove

The plate-shaped portion (511) is formed with a through hole (511 a) that penetrates the front surface side and the back surface side, and the through hole (511 a) includes an inclined surface (511 b) that has a shape that gradually increases in diameter from the front surface side toward the back surface side so as to correspond to the outer peripheral surface of the fan member (540).

7. The low-vibration turbine provided with the bearing portion between the impeller and the fan member as claimed in claim 6,

the motor part (100) comprises an injection port (160), the injection port (160) is formed in a mode of opening in a mode of enabling air to flow into the inner space from the outside,

the annular extension part (512) comprises a side surface opening hole (512 a) formed on the side surface in a mode of communicating the inner space and the outer space,

the rear end side bearing section (500) includes a discharge port (560), the discharge port (560) being provided so as to communicate the side surface opening hole (512 a) with the outside, and

when the fan member (540) rotates, air flowing in through the inlet (160) flows through the motor unit (100) and the side opening hole (512 a), and is discharged to the outside through the outlet (560).

8. The low-vibration turbine provided with a bearing portion between an impeller and a fan member according to claim 1,

the rear end side shaft (520) includes:

a fan support section (521) which is coupled to the rear surface side of the motor section (100) and into which a fan member (540) is inserted on the outer peripheral surface;

a bearing support part (522) which is formed to extend to the back side of the fan support part (521), is formed to have an outer diameter larger than or equal to the outer diameter of the fan support part (521), and is inserted with a rear end side bearing (550) at the outer peripheral surface; and

and an impeller supporting part (523) which is formed to extend to the back side of the bearing supporting part (522), is formed to have an outer diameter smaller than that of the fan supporting part (521), is used for inserting and combining the rear-end impeller (340), and applies a rotating force to the rear-end impeller (340) when the motor part (100) operates.

9. The low-vibration turbine provided with the bearing portion between the impeller and the fan member as claimed in claim 8,

the rear end side bearing (550) includes a bearing housing cover (551), and the bearing housing cover (551) is respectively attached to the front surface side and the back surface side.

10. The low-vibration turbine provided with the bearing portion between the impeller and the fan member as claimed in claim 1,

comprises a thrust disk (600) which is provided between the front end part (200) and the front end side bearing part (400) and which is provided with

The thrust disk (600) restricts the movement of the motor unit (100) while discharging air injected into the front end side of the motor unit (100) to the rear side when the fan member (540) is operated.

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