JPS6032537A - Liquid-sealed motor - Google Patents

Abstract

PURPOSE:To improve the cooling performance of a stator by providing a through hole for connecting between adjacent stator side spaces at an intermediate bracket. CONSTITUTION:A plurality of rotors are mounted on one motor shaft, stators corresponding to the rotors are individually sealed by cans, thereby forming a liquid-sealed motor. An intermediate bracket which has bracket units 13a, 13b for holding radial bearings at both end sides and a base 13c is disposed between the stators, and through holes 15 are formed at the solid unit except a recess of the base 13c. A hole 17 for leading power supply wirings 16 to a stator is formed at one of the holes 15, and the hole 17 is blocked by a blocking plate 19. The both spaces of the stators are connected via the holes 15, thereby circulating liquid in the both spaces through the holes 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid-sealed electric motor having a plurality of electric parts, the stator of which is sealed by a can.

Conventionally, in this type of liquid-ring type electric motor, a plurality of rotors are attached to one motor shaft, and a stator corresponding to each rotor is individually sealed with a can.

The rotor and stator fixed to the motor shaft are operated in appropriate numbers depending on the size of the load, so the ambient temperature of the stator on the operating side is high, and the ambient temperature of the stator on the stopping side is low. low. For this reason, in the past, the heat balance was poor, which was not desirable in terms of cooling the stator side.

The present invention has been made in view of the above points, and in both the first invention and the second invention, cylindrical cans are provided at each of a plurality of locations within the outer shell, and each space is separated from the rotor side space. In a liquid-sealed electric motor in which the cans form a stator side space in a sealed state, an intermediate platen connecting the adjacent cans is disposed;
The above-mentioned conventional disadvantages are solved by having a common configuration in which through holes are formed at a plurality of locations in the intermediate bracket to communicate adjacent stator side spaces.

Further, in the second invention, at least one of the through holes is further provided.
An intermediate bracket which solves the above-mentioned inconvenience and simplifies wiring by adding a structure in which the feeder wires of both adjacent stators are inserted and a hole for drawing out the feeder wires is formed in communication with the intermediate bracket) 1 provide.

An embodiment of the first invention and the second invention will be described below based on FIGS. 1 to 3.

In the figure, 1 is an outer shell, and 2 is a bellows that closes the opening at the lower end of the outer shell 1. By expanding and contracting the bellows, the pressure inside and outside of the outer shell 1 is adjusted to be approximately the same. 3 is a thrust bearing, 4 is a radial bearing,
5 is a motor shaft supported by the thrust bearing 3 and radial bearing 4 for free rotation, 6.7 is an upper bracket and a lower bracket that hold the radial bearing 4), 8m, sb is a rotation fixed to the motor shaft 5. child% 9a, sb is rotor 8a
, 8b corresponds to the stator, 10.11 corresponds to the stator 9a, 9
Sealing b - J' - A cylindrical can made of a non-magnetic material such as stainless steel, whose both ends are fixed to the collar 12, while the middle part is caulked into the slots of the stators 9a and 9b. Bracket parts 13a and 13 are located between the stators 9a and 9b and hold the radial bearings 14 at both ends.
3b and a base 13c having recesses evenly distributed around its outer periphery, a through hole 15 is formed in the solid portion of the base 13c excluding the recesses, and one of the through holes 15 is provided with a through hole 15. Holes 17 for drawing out the power supply lines 16 of the stators 9a and 9b are formed in communication. 18 is a bolt that fixes the intermediate bracket 13 to the collar 12, and 19 is connected to the outside through the hole 17.Next, the function will be explained.

Since the through holes 15 formed in the intermediate bracket 13 communicate with each other between the stator 9a and the sb side, the liquid in both spaces circulates through the through holes 15. Therefore, for example, if the load is small, one rotor 8a and stator 9a or rotor 8
Even when only the stator 9b and the stator 9b are in operation and the other is stopped, both liquids are supplied to the cooling liquid of the stator on the operating side, improving the cooling performance.

In addition, one through hole 150 has one power supply line for stators 9a and 9b.
6 and take it out through the hole 17't-, and after connecting the wire, push the connection part into the hole 11 to fix the power supply line 16, so that all the power is supplied from the outside, so the power supply connection is extremely simple. It becomes easy.

In the above embodiment, two sets of rotors and a stator are used, but it is of course possible to apply the present invention to a structure with three or more sets.

As explained above, according to the present invention, the first invention and the second invention
In both of the above inventions, in a liquid ring electric motor in which a stator side space is separated from a rotor side space by a cylindrical can in each of a plurality of cylinders Dr in an outer shell and each forms a sealed stator side space, the adjoining cans An intermediate bracket is provided to connect the stator side spaces, and a plurality of through holes are formed in the intermediate bracket to connect the adjacent stator side spaces, so that the liquid in all the stator side spaces is communicated with each other. As a result, the cooling capacity of the stator is improved.

Further, in the second invention, at least one of the through holes further includes:
Since a configuration is added in which the feeder wires of both adjacent stators are inserted and the holes for drawing out the feeder wires are formed in communication with each other, it is possible to provide an intermediate bracket that greatly simplifies the power feed connection.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of a tandem-type liquid-ring electric motor according to an embodiment of the present invention, FIG. 2 is an enlarged half-sectional view of the same intermediate bracket, and FIG. It is a sectional view taken along the human arrow. 1...Outer ff 2...Bellows 5...Motor shaft 8a, 8b...Rotor 9a, 9b...Stator 10
．． 11...Can 13...Intermediate bracket 15.
...Through hole 16...Power supply m 17...Hole agent
Masuo Oiwa (and 2 others)

Claims (2)

[Claims] (1) In a liquid-ring type electric motor in which a stator side space is separated from a rotor side space by cylindrical cans at each of a plurality of locations in the outer shell and each space is sealed, a stator side space is formed in each of the adjacent cans. What is claimed is: 1. A liquid-sealed electric motor characterized in that an intermediate bracket is provided to connect the stator side spaces, and through holes are formed at a plurality of locations in the intermediate bracket to connect adjacent stator side spaces. (2) In a liquid-sealed electric motor in which stator side spaces are separated from the rotor side space by cylindrical cans at multiple locations in the outer shell, each of which is in a sealed state, the adjacent cans An intermediate bracket is provided to connect the stator side spaces, and through holes are formed at a plurality of locations in the intermediate bracket to communicate the adjacent stator side spaces, and at least one of the through holes is provided with:
A liquid-sealed electric motor characterized in that feeder wires of both adjacent stators are inserted, and holes for drawing out the feeder wires are formed in communication.