JP3169809B2 - Spherical motor pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spherical motor pump, and more particularly to a spherical motor pump in which lubricating water is supplied to a contact surface between, for example, a spherical shaft and a bearing cap.

[0002]

2. Description of the Related Art A conventional spherical motor pump 1 of this type shown in FIG. 4 includes a rotor 2 having a motor rotor 2a, an impeller 2b, a rotor support 2c, and the like. Through holes 3 are formed to extend vertically. A bearing cap 5 having a concave spherical surface 5a along the spherical outer surface of the shaft 4 is attached to the lower surface of the central portion of the rotor support 2c. Bearing cap 5
A through hole 5b is formed in the center of the
As shown in FIG. 5, a plurality of grooves 5c for passing lubricating water are formed radially outward from the periphery of the through hole 5b.

During operation of the spherical motor pump 1, water is sucked from the pump suction port 6 by the action of the impeller 2b, and a part of the water flows as shown by the arrow in FIG.
Lubricating water is supplied to the contact surface between the shaft 4 and the bearing cap 5 from the groove 5c (FIG. 5) of the bearing cap 5.

[0004]

In the prior art, the lubricating water was supplied from the groove 5c (FIG. 5) formed in the bearing cap 5. However, since the cross section of the groove 5c is small, foreign matter is contained in the lubricating water. In such a case, there is a possibility that the foreign matter may be clogged in the groove 5c or the foreign matter may enter the contact surface between the shaft 4 and the bearing cap 5 to damage the bearing portion.

[0005] Therefore, a main object of the present invention is to provide a spherical motor pump capable of preventing a groove for supplying lubricating water from being closed or a bearing from being damaged.

[0006]

SUMMARY OF THE INVENTION The present invention provides a spherical shaft,
The rotor support, the bearing cap attached to the lower portion of the rotor support and placed on the shaft, the first groove formed on the inner surface of the bearing cap for water lubrication between the shaft and the rotor support, A spherical motor pump having a through-hole penetrating therethrough and communicating with the first groove, wherein the second part communicates with the through-hole at a lower portion of the rotor support and has a cross section larger than the first groove.
A spherical motor pump characterized in that the groove is formed.

[0007]

In addition to the first groove for supplying lubricating water, a second groove having a cross section larger than the first groove is formed. Therefore, foreign matter having a size enough to clog the first groove will not
And is discharged from the upper end of the through hole.

[0008]

According to the present invention, it is possible to prevent the groove for supplying the lubricating water from being closed by the foreign matter and to prevent the bearing portion from being damaged by the foreign matter. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

1 shows a spherical motor pump 1 according to this embodiment shown in FIG.
0 is a spherical shaft 1 fixed and supported by the support 12
4, including a bearing cap 16 put on the shaft 14, a rotor 18 fixed to the bearing cap 16, and the like. Axis 14
Is made of a hard material such as a ceramic or a hard metal, and is finished with high precision so as to be substantially spherical.

As can be clearly understood from FIGS. 2 and 3, the bearing cap 16 is formed into a substantially cylindrical shape by sintering after press molding with carbon, and the like, and the lower surface of the bearing cap 16 (the upper surface in FIG. 2). ), A concave spherical surface 20 is formed along the spherical outer surface of the shaft 14, and a through hole 22 for allowing water to pass therethrough is formed in the center portion in the vertical direction. A plurality of (six in this embodiment) first grooves 24 for allowing water to pass therethrough are formed in the concave spherical surface 20 substantially radially outward from the periphery of the through hole 22.

The rotor 18 includes a motor rotor 26, an impeller 28, a rotor support 30 and the like. A through hole 32 for allowing water to pass therethrough is formed in the center of the rotor support 30 in the vertical direction. A hole 34 (FIG. 2) for receiving the bearing cap 16 is formed in the lower surface of the central portion of the portion 30. The inner side surface and the bottom surface of the hole 34 are shown in FIG.
As can be seen from FIG.
Groove 36 is formed so as to communicate with through-hole 32.
The cross section of the second groove 36 is made larger than the cross section of the first groove 24 formed in the bearing cap 16 so that foreign matter can easily pass therethrough.

When assembling the spherical motor pump 10,
The bearing cap 16 is fitted into the hole 34 of the rotor support 30 (tight fit), and the bearing cap 16 is put on the shaft 14. The bearing cap 16 is inserted into the hole 34 of the rotor support 30.
In the state in which the hole 3 is fitted, the hole 3 is
4 is closed, but the second groove 36 is left as a water passage as it is.

In such a spherical motor pump 10, when a start switch (not shown) is turned on, the pump 1 is moved from the suction port 38 (FIG. 1) by the action of the impeller 28.
The water is sucked into the chamber 0 and is discharged from a discharge port (not shown). Further, a part of the water taken into the pump 10 flows as indicated by an arrow in FIG. That is, the impeller 28
Is supplied to the through hole 32 of the rotor support portion 30 through the first groove 24 and the through hole 22 of the bearing cap 16 or the second groove 36, and the through hole 32
Is discharged from the upper end of the In this process, the first groove 2
From 4, lubricating water is supplied to the contact surface between the shaft 14 and the bearing cap 16. At this time, if foreign matter having a size enough to clog the first groove 24 is mixed in the water supplied as the lubricating water, the foreign matter passes through the second groove 36 through the through hole 3.
2 given.

According to this embodiment, foreign matter is transferred to the second groove 36.
Can be prevented from blocking the first groove 24 and damaging the bearing portion. In the above-described embodiment, the case where two second grooves 36 are formed on the inner side surface and the bottom surface of the hole 34 has been described.
One or three or more grooves 36 may be formed.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is a perspective view showing a bearing cap and a second groove in the embodiment of FIG. 1;

FIG. 3 is an illustrative view showing a bearing cap in the embodiment in FIG. 1;

FIG. 4 is an illustrative view showing a conventional technique;

FIG. 5 is an illustrative view showing a conventional bearing cap;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Spherical motor pump 12 ... Support part 14 ... Shaft 16 ... Bearing cap 18 ... Rotor 22, 32 ... Through-hole 24 ... 1st groove 30 ... Rotor support part 36 ... 2nd groove

Continued on the front page (72) Inventor Tomoaki Inuchi 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota Vinyl Pipe Factory (72) Inventor Masaru Tomisaka 1-2-47 Shikitsuhigashi, Namiwa-ku, Osaka-shi Kubotarang Inside (72) Inventor Atsushi Osawa 1-2-47 Shizitsuhigashi, Naniwa-ku, Osaka-shi Inside Kubotalang Co., Ltd. (56) References JP-A-2-188689 (JP, A) JP-A-48-45904 (JP, A) JP-A-47-6432 (JP, A) JP-A-50-48340 (JP, A) JP-A-50-1545749 (JP, A) JP-A-5-202892 (JP, A) open flat 5-133419 (JP, a) JitsuHiraku Akira 55-170492 (JP, U) US Patent 4793771 (US, a) United States Patent 4072446 (US, a) (58 ) investigated the field (Int.Cl. ^7, (DB name) F04D 13/06 F04D 29/04 F04D 29/70

Claims (1)

(57) [Claims] 1. A spherical shaft, a rotor support, a bearing cap attached to a lower portion of the rotor support and covered on the shaft, and an inner surface of the bearing cap formed for water lubrication between the shaft and the shaft. A spherical motor pump having a first groove and a through hole vertically penetrating through the rotor support and communicating with the first groove, wherein a lower part of the rotor support communicates with the through hole and has a cross section. A spherical motor pump, wherein a second groove larger than the first groove is formed.