JPS59153432A - Cap-shaped bearing shield of rotary machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a bearing shield for a rotating machine having a condensed water drain 1, which is connected to a rotating machine housing (in a core-tight manner) by a ring-shaped end surface of its peripheral wall. It concerns what is joined.

[Prior art and its problems]

For condensation-proof rotating machines, there is a drain on the underside of the rotating machine housing that can be closed with a removable plug to drain condensed water, and this drain should be supervised for safety reasons. It is a good idea to open it up from time to time. This is because the drain opening is large enough to allow drainage to occur as unobstructed as possible, so there is no danger that solid foreign objects in the form of rods or strips may be inserted into the rotating machine through the drain opening and come into contact with the windings or rotating parts. Because it is possible. Furthermore, if a drain is provided in the rotary machine housing, there is a restriction that such a rotary machine can only be used in a horizontal position. This is because in the vertical operating position of the rotary machine shaft the water level can rise above the lower coil end and bearing, which cannot be avoided for insulation and operational safety reasons.

[Purpose of the invention]

This invention reliably prevents the risk of solid foreign matter as described above being inserted into the rotating machine regardless of whether the blind plug is removed or no blind plug is installed at all, and
and the condensate water level will not rise to a dangerous level even if the rotary machine is used in the designated position (drainage I
The purpose is to maintain an appropriately low water level.

[Key points of the invention]

This purpose is to provide a bearing shield of the above-mentioned type, in accordance with the present invention, in which at least one drain port is provided in the peripheral wall of the bearing shield, the length of which is larger than the inner diameter, and the drain port is connected to the inner surface of the bearing shield. An opening is opened inside the bearing shield at intervals from the opening, and a solid body is inserted into the drain port at five intervals in front of this opening inside the bearing shield. This is achieved by providing a blocking wall for the object A, and having a surface of this blocking wall that is larger in size than the maximum possible conical range of the protruding side of the rod-shaped foreign object inserted therethrough.

[Embodiments of the invention]

Next, the present invention will be explained in detail with reference to drawings showing two embodiments of the bearing shield based on the present invention.

In FIGS. 1 to 5 showing Embodiment 1, a cap-shaped bearing shield l has a shaft through hole and a bearing housing chamber in its stop wall 2, and its peripheral wall 3 has a ring-shaped end 1 and a seedling 4. The entire circumference of this ring-shaped end surface is closely connected to a rotary machine housing 5, only a portion of which is shown.

The bearing shield 1 has a peripheral wall portion 6 that is thicker toward the outside in the lower portion during operation (in the horizontal arrangement of the rotating machine).
An axial drainage lower is provided in this part, and the drainage outlet is a water reservoir tank 8 which is sunk and strung inside this peripheral wall part.
It opens near the bottom. The water reservoir cypress is arranged asymmetrically with respect to the open lower A when viewed in the circumferential direction. The tank wall 8A facing the open lower person forms a blocking wall, and next to this, a condensed water collection groove 9 is provided obliquely above the drainage lower 0 open lower A.

The length and inner diameter of the drain lower correspond to the relevant regulations.17 The dimensions are determined so that the test shown by the dashed-dotted line (10) is guided only by the blocking wall of the tank and cannot reach the inside of the rotating machine. . The water reservoir SS is located below the radially inner lip 2B which is additionally molded onto the two inner front faces, and its opening side tank wall 8B is in line with the back surface of the lip. Therefore, in the horizontal and vertical operating positions of the rotating machine, it is ensured that the condensate water level inside the rotating machine remains far below the energized parts of the rotating machine, i.e. within a range that does not interfere with the windings of the rotating machine. reactor. Regardless of whether the core is configured to allow sufficient drainage of condensate water or not, a reliable protection against overcrowding for foreign objects of the above type is achieved.

A similar effect can be obtained by the second embodiment of the bearing shield shown in FIGS. 6 to 8. Here again, the same parts as in FIGS. 1 to 5 are given the same reference numerals.

In the second embodiment, the thick peripheral wall portion 6 is provided with radial drainage []1
1 is provided, and this drainage port is located inside the bearing shield at a small distance from the inner front face 2A, and in an axial condensed water collection groove 12 dug into the thick peripheral wall portion. It is open to

Drain port] Opening 11A of 1 and water collection groove A part of 2 is additionally molded on the inner front two and is covered at intervals by a blocking wall I3, and the surface of this blocking wall is the drain port. The dimensions are not determined so that the test rod 10 inserted through the surface is guided only toward this surface. The dimensions of the length and the inner diameter of the drain opening 11 are selected accordingly, the inner diameter being dimensioned in such a way that even one portion of the condensed water can be drained off. The blocking wall 13 is additionally molded at right angles to the radial inner rib 2B at its outer end and is connected to the two inner front faces.

〔Effect of the invention〕

In a bearing shield of the above type, according to the present invention, at least one drain port is provided in the peripheral wall of the bearing shield, the length of which is larger than the inner diameter, and the drain port is spaced apart from the inner front surface of the bearing shield. An opening is provided inside the bearing shield, and a blocking wall is provided at a distance in front of this opening in the interior of the bearing shield for preventing solid foreign objects from penetrating the drain hole, and the surface of this blocking wall The size of the protruding side cone is smaller than the maximum possible conical range of the rod-shaped foreign object.

With this configuration, even if a rod-shaped foreign object penetrates the drain port, its tip will be blocked by the blocking wall and will not reach the inside of the rotating machine.Therefore, there is no risk of touching the windings or rotating parts, and the tip will not reach the inside of the rotating machine. The inner diameter of can be dimensioned to be sufficient for drainage of condensate. In addition, regardless of whether the rotating machine is used horizontally or vertically, the drain port is located near the lowest position of the total amount inside the rotating machine, so the water level of condensed water remains at a low level and does not rise to the coil end or bearing area. There's nothing to do.

4. Simple illustration of the drawings FIG. 1 is an axial cross-sectional view of the lower half of the bearing shield according to the first embodiment of the present invention, and FIG. 2 is an axial sectional view of the lower half of the bearing shield shown in FIG.
- A partial cross-sectional view taken along the cutting line ■-■, Figure 3 is
Partial front view of the bearing shield shown in Fig. 4, seen from arrow I.
1 is a partial perspective view of the bearing shield shown in FIG. 1, FIG. 5 is a partial perspective view of the bearing sheath shown in FIG. FIG. 7 is a partial sectional view taken along the cutting line ■--■ of the bearing shield shown in FIG. 6, and FIG. FIG.

16 in the drawing, 1 is the bearing shield, 2A is the inner front,
2B is the inner rib, 3 is the peripheral wall, 4 is the ring-shaped end surface, and 5 is the rotating machine? )Using, 6 is a thick peripheral wall part, 7.11 is a drain port, 7A, 11 is an opening, 8 is a water tank, 8A, 13
1 is a blocking wall, 9 and 12 are water collecting grooves, and 10 is a solid foreign object.

Yuu \-1- FIG 3 FIG 4 FIG2 FIG 5

Claims (1)

[Scope of Claims] 1) A cap-shaped bearing shield for a rotating machine having a condensed water drain port, the shield being tightly coupled to a rotating machine housing by a ring-shaped end surface of its peripheral wall; At least one drainage port having a length larger than the inner diameter is provided in the peripheral wall of the shield, and this drainage port opens into the inside of the bearing shield at a distance from the inside front surface of the bearing shield, and the opening opens into the inside of the bearing shield at a distance from the inside front surface of the bearing shield. A barrier IF wall is provided at a distance in front of the drain [1] for preventing solid foreign matter that may be inserted into the drain. A cap-shaped bearing shield for a rotating machine characterized by dog-shaped dimensions. 2. A cap-shaped bearing shield for a rotating machine as set forth in claim 1, wherein the drain port is provided in a peripheral wall portion that is thickened toward the outside. 3) Percentage of Claims In the bearing shield according to claim 1 or 2, the drain port is oriented parallel to the axis, and the water tank is provided by being sunk inside the peripheral wall portion which is also thickened. A rotation characterized in that the tank wall is provided with a water collecting groove that opens opposite to the tank wall forming the blocking wall, and is offset in the circumferential direction next to the blocking wall so that the tank wall is located obliquely above the opening of the drain port. Machine cap-shaped bearing shield. 4) A cap-shaped bearing shield for a rotating machine according to claim 3, characterized in that the water reservoir is arranged at a distance from the inner front surface of the bearing shield. 5) A cap-shaped bearing shield for a rotating machine as claimed in claim 4, wherein the water reservoir is disposed below the inner rib coupled to the inner front surface. 6) % Allowance In the bearing shield according to claim 1 or 2, the drain port is oriented in the radial direction and the drain port is arranged on the inner front surface into the axial water collection groove provided on the inner side of the peripheral wall of the bearing shield. 1. A cap-shaped bearing shield for a rotating machine, which has an opening in the vicinity thereof, and at least a portion of a drain opening, that is, a water collection groove, is covered at intervals by a blocking wall provided on an inner front surface of the bearing shield. 7) A cap-shaped bearing shield for a rotating machine according to claim 6, characterized in that the blocking wall is coupled to the outer end of the radially inner rib perpendicularly to the rib.