JP7168399B2 - Motor and pump device - Google Patents

Description

The present invention relates to a motor and pump device having a motor fan for cooling.

As a pump device for increasing pressure and supplying fluid such as water, there is known a configuration in which a pump is connected to a motor via a rotating shaft (see, for example, Patent Document 1). A motor used in such a pump device has a pump at one end and a motor fan for cooling at the other end.

As a specific example, the motor fan includes a fan connected to a rotating shaft protruding from the other end of the motor casing of the motor, and a fan cover provided at the other end of the motor casing to cover the fan. The motor fan sucks air from a vent provided in the fan cover, passes through the inside of the fan cover, and blows air in the axial direction along the outer peripheral surface along the extending direction of the heat radiation fins provided on the motor casing. do.

JP 2014-109195 A

However, since the motor fan described above is provided on the side opposite to the pump side in the axial direction, if it is provided in the pump device, it is arranged outside the pump device. As a result, wind noise from the fan tends to leak outside, causing noise. Further, in the case of a vertical shaft pump having a rotating shaft extending in the direction of gravity, the fan is arranged on the uppermost side of the pump device. For this reason, in a pump unit in which a pump device is arranged in a case, there is also the problem that the cooling efficiency is lowered because the relatively high-temperature air accumulated in the upper part of the case is blown by the fan.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a motor and a pump device capable of suppressing noise and improving cooling efficiency.

As one aspect of the present invention, a motor includes a motor casing, a stator provided in the motor casing, a rotor provided in the motor casing, and a motor bracket provided at one end of the motor casing. a fan provided on a rotary shaft connected to the rotor and arranged between the pump connected to the rotary shaft and the motor bracket; and a fan provided on the motor casing or the motor bracket and covering the fan. a cover , wherein the motor casing includes fins, and the fan cover has openings facing the fins, and directs air blown radially outward by the fan toward the motor. Convert to flow .

Further, as one aspect of the present invention, a pump device includes a pump having an impeller, a rotating shaft connected to the impeller, a motor casing, a stator provided in the motor casing, and a stator provided in the motor casing. a rotor to which the rotating shaft is connected; a motor bracket provided at one end of the motor casing; a fan provided on the rotating shaft and arranged between the pump and the motor bracket ; a motor having a fan cover mounted on the motor bracket and covering the fan , the motor casing having fins, the fan cover having openings facing the fins, and the fan diametrically circulating. The air blown outward in the direction is converted into a flow towards the motor side .

According to the present invention, it is possible to provide a motor and a pump device capable of suppressing noise and improving cooling efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS The top view which shows the structure of the pump apparatus which concerns on the 1st Embodiment of this invention with a partial cross section. Sectional drawing which shows the structure of the motor of the same pump apparatus, and a pump. The side view which shows the structure of the pump apparatus based on the 2nd Embodiment of this invention with a partial cross section.

A pump device 1 according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG.
FIG. 1 is a plan view showing the configuration of a pump device 1 according to a first embodiment of the invention. FIG. 2 is a side view showing a partial cross section of the configuration of the motor 12 and the pump 14 of the pump device 1. As shown in FIG.

As shown in FIG. 1 , the pump device 1 includes a base 10 , a cover 11 covering the base 10 , a motor 12 , a rotary shaft 13 , a pump 14 and a shaft seal device 15 . In this embodiment, the pump device 1 will be described using an example of a so-called horizontal pump or horizontal shaft pump, in which the rotating shaft 13 extends in a direction perpendicular to the vertical direction. The pump device 1 is formed so as to increase the pressure of a liquid such as water and pump it to the secondary side.

The pedestal 10 is a base that supports the motor 12 and the pump 14 . The frame 10 is installed on the floor on which the pump device 1 is laid. The cover 11 covers the components arranged on the frame 10 by covering the top of the frame 10 .

The motor 12 includes a motor casing 21 , a stator 22 , a rotor 23 , a motor bracket 24 , bearing members 25 and a fan 26 . A rotating shaft 13 is fixed to a rotor of the motor 12, and the rotating shaft 13 is rotatable.

The motor casing 21 accommodates the stator 22 and the rotor 23 inside. The motor casing 21 is, for example, open at one end facing the pump 14 and closed with a cover at the other end. Further, the motor casing 21 has a plurality of fins 21a forming a heat sink on its outer peripheral surface. Adjacent fins 21a are separated from each other at least on the end portion side on the side of motor bracket 24, so that adjacent fins 21a are separated from each other so as to allow ventilation.

The stator 22 has, for example, a cylindrical shape and is fixed inside the motor casing 21 . The rotor 23 is rotatably provided within the stator 22 . The rotating shaft 13 is fixed to the center of the rotor 23 .

The motor bracket 24 is provided at the end of the motor casing 21 facing the pump 14 . As shown in FIG. 2, the motor bracket 24 closes the open end of the motor casing 21 . The motor bracket 24 includes a central hole 24a through which the rotating shaft 13 is inserted, a main surface of the motor bracket 24 on the pump 14 side, and a bracket 24b provided around the hole 24a, A mounting portion 24c, which is a main surface of the motor bracket 24 on the inner side of the motor casing 21 and is provided around the hole portion 24a, is provided for mounting the bearing member 25 thereon.

The inner diameter of the hole portion 24 a is configured to be slightly larger than the outer diameter of the rotating shaft 13 . The bracket 24b is configured in a cylindrical shape. The mounting portion 24c has an inner diameter with which the bearing member 25 can be fitted. The bearing member 25 is, for example, a ball bearing.

A fan 26 is arranged between the pump 14 and the motor bracket 24 and rotatably fixed to the rotating shaft 13 . The fan 26 includes a shroud 41 , blades 42 and a boss portion 43 provided at the center of the shroud 41 . As the fan 26 rotates, the plurality of blades 42 blow air radially outward. The fan 26 is fixed to the rotary shaft 13 with the blades 42 facing the pump 14 .

Shroud 41 is formed in a disc shape. Blades 42 are provided on one main surface of shroud 41 . A plurality of blades 42 are provided on one main surface of the shroud 41, for example. The blades 42 blow air radially outward of the shroud 41 as the shroud 41 rotates.

A boss portion 43 is provided at the center of the shroud 41 . The boss portion 43 is cylindrical and fixed to the rotating shaft 13 . Also, the boss portion 43 has an outer diameter that is the same as or larger than the inner diameter of the bracket 24b of the motor bracket 24, for example. As a specific example, the boss portion 43 includes an inner cylindrical portion 43a fixed to the rotating shaft 13 and an outer cylindrical portion 43b connected to the inner cylindrical portion 43a at one end side and having an outer diameter equal to or larger than the inner diameter of the bracket 24b. , provided. The outer cylindrical portion 43b is arranged adjacent to the bracket 24b.

The rotary shaft 13 has one end inserted into the motor 12 and the other end inserted into the pump 14 . An impeller 32 of the pump 14 , which will be described later, is fixed to the end of the rotary shaft 13 inserted into the pump 14 . Further, the rotary shaft 13 is provided inside the pump 14 , a shaft seal device 15 is provided between the impeller 32 and the motor 12 , and a fan 26 is provided between the pump 14 and the motor 12 .

As shown in FIG. 2 , the pump 14 has a pump casing 31 and an impeller 32 . The pump 14 is, for example, a so-called single-stage pump having a single impeller 32 .

The pump casing 31 has a casing 35 and a casing cover 36 . The pump casing 31 is configured by integrally assembling a casing 35 and a casing cover 36, and constitutes a pump chamber 31a in which the impeller 32 is accommodated.

The casing 35 is open at one end in the axial direction and has a suction port 35a at the other end. Moreover, the casing 35 has a discharge port 35b in a part of the outer peripheral portion.

The suction port 35a is fluidly connected to the pump chamber 31a. A check valve and a pipe are connected to the suction port 35a, for example. The discharge port 35b is fluidly connected to the pump chamber 31a. A pipe is connected to the discharge port 35b.

The casing cover 36 includes a case portion 51 that covers the opening end of the casing 35 and a fan cover portion 52 that is provided integrally with the case portion 51 and covers the fan 26 provided on the rotating shaft 13 .

The case portion 51 is integrally attached to the casing 35 . The case portion 51 has a hole portion 51a. The hole portion 51a is an opening provided in a wall portion forming the pump chamber 31a and through which the rotating shaft 13 is inserted. The hole portion 51a is configured so that the shaft sealing device 15 can be arranged.

The fan cover portion 52 covers the rotating shaft 13 and the fan 26 . The fan cover portion 52 includes a slit portion 52a provided at a portion of the end portion on the pump 14 side, an opening portion 52b provided at a portion of the end portion on the motor 12 side in the circumferential direction, and an end portion on the motor 12 side. and a connecting portion 52c for fixing the motor 12 provided at another portion in the circumferential direction of the portion.

A portion of the fan cover portion 52 where the opening portion 52b is provided has an inner peripheral surface having an inner diameter larger than at least the outer diameter of the end portion of the motor 12 facing the fan cover portion 52 .

As a specific example, the portion of the fan cover portion 52 where the opening portion 52b is provided is formed in a partial cylindrical shape having an arcuate cross-sectional shape with a predetermined central angle. The inner peripheral surface of the portion of the fan cover portion 52 where the opening 52b is provided has the same radius of curvature and extends along the axial direction. It is set larger than the radius of the outer peripheral surface of the motor casing 21 .

The slit portion 52 a is an intake port for sucking air into the fan cover portion 52 . For example, the slit portion 52a is provided at one location in the fan cover portion 52 in the circumferential direction.

The opening 52b is defined by the difference between the radius of curvature of the inner peripheral surface of the fan cover 52 where the opening 52b is provided, the radius of the outer peripheral surface of the motor bracket 24, and the radius of the outer peripheral surface of the motor casing 21. An aperture is configured between 52 and motor 12 . That is, the opening 52b faces part or all of the plurality of fins 21a of the motor casing 21. As shown in FIG.

The connecting portion 52 c connects the pump casing 31 to the motor bracket 24 .

The impeller 32 is fixed to the rotating shaft 13 so as to be rotatable as the rotating shaft 13 rotates.

The shaft seal device 15 is provided between the impeller 32 and the hole portion 51 a of the case portion 51 of the pump casing 31 . The shaft seal device 15 is a so-called mechanical seal. The shaft sealing device 15 seals the gap between the hole 51 a and the rotating shaft 13 .

The accumulator 17 is connected between the pump chamber 31a of the pump casing 31 and the discharge port 35b. The accumulator 17 is configured to be able to accumulate pressure.

According to the pump device 1 having the fan 26 on the rotating shaft 13 between the motor 12 and the pump 14 configured in this way, when the impeller 32 of the pump 14 is rotated by driving the motor 12, the fan 26 is also rotated. do. At this time, the fan 26 blows the air on the case portion 51 side of the air inside the casing cover 36 radially outward. The blown air hits the inner peripheral surface of the fan cover portion 52 and is partially converted into a flow toward the opening 52b and a flow toward the main surface side of the motor bracket 24 facing the pump 14 . Air flowing axially from the opening 52b cools the motor casing 21 by passing between the plurality of fins 21a of the motor casing 21 . Also, the air flowing toward the motor bracket 24 cools the motor bracket 24 .

Thus, the fan 26 can cool the motor 12 . Further, the air blown by the fan 26 is the air in the casing cover 36 that is cooled by the water flowing through the pump chamber 31a in the pump 14 and is on the side of the case portion 51. Therefore, the motor 12 is efficiently cooled. can do. Further, the fan 26 also blows air to the motor bracket 24 , thereby cooling the bearing member 25 provided on the motor bracket 24 that generates heat by sliding due to the rotation of the rotating shaft 13 .

In addition, since the fan 26 is housed inside the casing cover 36, it is possible to reduce wind noise caused by rotation, and noise can also be reduced.

Furthermore, the fan 26 is arranged between the pump 14 and the motor 12 to prevent water from moving to the motor 12 side in the event of water leakage from the pump 14 or condensed water. can. Further, the fan 26 is provided with a shroud 41 so that the shroud 41 can restrict the movement of water from the pump 14 side to the motor 12 side, and also serves as a draining collar. Therefore, there is no need to provide a draining collar, and the number of parts of the pump device 1 can be reduced. Furthermore, by making the outer diameter of the outer cylindrical portion 43b of the boss portion 43 larger than the inner diameter of the bracket 24b of the motor bracket 24, it is possible to further prevent water from entering the bracket 24b.

As described above, according to the pump device 1 according to the embodiment of the present invention, by arranging the fan 26 between the motor 12 and the pump 14, it is possible to suppress noise and improve the cooling efficiency.

It should be noted that the present invention is not limited to the above-described embodiments. For example, in the above example, the pump device 1 is a so-called horizontal shaft pump in which the rotating shaft 13 extends in a direction orthogonal to the vertical direction, but the present invention is not limited to this. For example, like a pump device 1A according to another embodiment shown in FIG. 3, it may be a so-called vertical shaft pump in which the rotating shaft 13 extends vertically. The pump device 1A shown in FIG. 3 has the same configuration as the pump device 1 described above, except for the configuration in which the rotating shaft 13 extends in the vertical direction. Detailed description is omitted.

For example, since such a pump device 1A is a vertical shaft pump, the pump 14 is arranged on the pedestal 10, the motor 12 is arranged above the pump 14, and each component covers the pedestal 10. It is covered with a cover 11 . Also, the fan 26 is provided on the rotary shaft 13 between the motor 12 and the pump 14 and housed in the casing cover 36 . Therefore, the pump device 1A has the same effects as the pump device 1 described above.

Also, in the pump device 1A, the heated air tends to accumulate in the upper part of the cover 11 . For this reason, in a configuration in which a fan is provided at the end of the motor 12 opposite to the pump 14 as in the conventional motor fan, the fan is arranged above the cover 11 . As a result, the fan blows air having a relatively high temperature inside the cover 11, so the cooling efficiency of the motor 12 is poor.

However, the pump device 1A of the present embodiment has a configuration in which the air between the motor 12 and the pump 14 is blown to the motor 12 by the fan 26 arranged below the motor 12. In other words, the air cooled by the water passing through the pump chamber 31 a of the pump 14 can be blown to the motor 12 . Therefore, even if the motor 12 is arranged above the cover 11, the pump device 1 is a vertical shaft pump, so that a high cooling efficiency can be achieved.

Further, in the above-described example, the pump device 1 is configured as a single-stage pump, but is not limited to this, and may be a multi-stage pump. Moreover, although the pump device 1 has been described as having a configuration including the cover 11 , the present invention is not limited to this, and a pump device that does not have the cover 11 may be used. Further, the pump device 1 may be configured to supply hot water. In the case of the configuration for supplying hot water, if the temperature of the air is lower than the temperature of the hot water passing through the pump chamber 31a of the pump 14, the air inside the casing cover 36 is not cooled, but the casing cover 36 is cooled. Since the slit portion 52a serving as an intake port is provided, the motor 12 can be cooled by blowing air having a temperature lower than that of hot water.

Furthermore, in the above-described example, the configuration in which the casing cover 36 of the pump 14 is provided with the fan cover portion 52 that covers the fan 26 has been described, but the present invention is not limited to this. In other words, the case portion 51 and the fan cover portion 52 of the casing cover 36 may be separated from each other. That is, the fan cover may be configured to be connected to the case portion 51 of the casing cover 36 and the motor bracket 24 . Also, the fan cover and the fan cover portion 52 may be configured to be connected to the motor casing 21 instead of the motor bracket 24 .

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the scope of the invention. Further, each embodiment may be implemented in combination as appropriate, in which case the combined effect can be obtained. Furthermore, various inventions are included in the above embodiments, and various inventions can be extracted by combinations selected from a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiments, if the problem can be solved and effects can be obtained, the configuration with the constituent elements deleted can be extracted as an invention.
Description equivalent to the invention described in the scope of claims at the time of filing of the present application will be added below.
[1] a motor casing;
a stator provided within the motor casing;
a rotor provided within the motor casing;
a motor bracket provided at one end of the motor casing;
a fan provided on a rotating shaft connected to the rotor and arranged between the pump connected to the rotating shaft and the motor bracket;
motor.
[2] The motor according to [1], further comprising a fan cover provided on the motor casing or the motor bracket to cover the fan.
[3] The motor casing includes fins,
The motor according to [2], wherein the fan cover has an opening facing the fins.
[4] The fan has a disk-shaped shroud, blades provided on one main surface of the shroud, and a boss provided at the center of the shroud and attached to the rotating shaft. motor as described.
[5] The motor bracket has a hole through which the rotating shaft is inserted, and a cylindrical bracket provided around the hole,
The motor according to [4], wherein the boss portion is provided adjacent to the bracket and has an outer diameter larger than an inner diameter of the bracket.
[6] a pump having an impeller;
a rotating shaft connected to the impeller;
a motor casing, a stator provided in the motor casing, a rotor provided in the motor casing to which the rotating shaft is connected, a motor bracket provided at one end of the motor casing, and the rotating shaft. a motor having a fan disposed between the pump and the motor bracket;
A pumping device comprising:
[7] The pump device according to [6], further comprising a fan cover provided on the motor casing or the motor bracket to cover the fan.
[8] The pump device according to [7], wherein the pump has a pump casing and a casing cover that is provided in the pump casing and includes a cover portion that forms a pump chamber that accommodates the impeller together with the pump casing. .
[9] The pump device according to [8], wherein the fan cover is provided integrally with the cover portion.
[10] The motor casing includes fins,
The pump device according to [8], wherein the fan cover has an opening facing the fins.
[11] The fan has a disk-shaped shroud, blades provided on one main surface of the shroud, and a boss provided at the center of the shroud and attached to the rotating shaft [6] The described pumping device.
[12] The motor bracket has a hole through which the rotating shaft is inserted, and a cylindrical bracket provided around the hole,
The pump device according to [11], wherein the boss portion is provided adjacent to the bracket and has an outer diameter larger than an inner diameter of the bracket.

DESCRIPTION OF SYMBOLS 1... Pump apparatus, 1A... Pump apparatus, 10... Base, 11... Cover, 12... Motor, 13... Rotating shaft, 14... Pump, 15... Shaft sealing device, 17... Accumulator, 21... Motor casing, 21a... Fin, 22... Stator 23... Rotor 24... Motor bracket 24a... Hole 24b... Bracket 24c... Mounting part 25... Bearing member 26... Fan 31... Pump casing 31a... Pump chamber 32... Impeller 35 Casing 35a Suction port 35b Discharge port 36 Casing cover 41 Shroud 42 Blades 43 Boss portion 43a Inner cylinder portion 43b Outer cylinder portion 51 Case portion , 51a... hole portion, 52... fan cover portion, 52a... slit portion, 52b... opening portion, 52c... connecting portion.

Claims (8)

a motor casing;
a stator provided within the motor casing;
a rotor provided within the motor casing;
a motor bracket provided at one end of the motor casing;
a fan provided on a rotating shaft connected to the rotor and arranged between the pump connected to the rotating shaft and the motor bracket;
a fan cover provided on the motor casing or the motor bracket to cover the fan;
with
The motor casing includes fins,
The fan cover has an opening facing the fins, and converts the air blown radially outward by the fan into a flow toward the motor. 2. The motor according to claim 1, wherein the fan has a disk-shaped shroud, blades provided on one main surface of the shroud, and a boss provided at the center of the shroud and attached to the rotating shaft. . The motor bracket has a hole through which the rotating shaft is inserted, and a cylindrical bracket provided around the hole,
3. The motor according to claim 2 , wherein said boss portion is provided adjacent to said bracket and has an outer diameter larger than an inner diameter of said bracket. a pump having an impeller;
a rotating shaft connected to the impeller;
a motor casing, a stator provided in the motor casing, a rotor provided in the motor casing to which the rotating shaft is connected, a motor bracket provided at one end of the motor casing, and a motor bracket provided at the rotating shaft a motor having a fan disposed between the pump and the motor bracket, and a fan cover provided in the motor casing or the motor bracket and covering the fan ;
with
The motor casing includes fins,
The fan cover has an opening facing the fins, and is a pump device that converts air blown radially outward by the fan into a flow toward the motor . 5. The pump device according to claim 4 , wherein the pump has a pump casing and a casing cover including a cover portion provided in the pump casing and forming a pump chamber containing the impeller together with the pump casing. The pump device according to claim 5 , wherein the fan cover is provided integrally with the cover portion. 5. The pump according to claim 4 , wherein the fan has a disk-shaped shroud, blades provided on one main surface of the shroud, and a boss provided at the center of the shroud and attached to the rotating shaft. Device. The motor bracket has a hole through which the rotating shaft is inserted, and a cylindrical bracket provided around the hole,
8. The pump device according to claim 7 , wherein said boss portion is provided adjacent to said bracket and has an outer diameter larger than an inner diameter of said bracket.

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