JPS58154361A - Submergeable motor - Google Patents

Abstract

PURPOSE:To improve the cooling effect and bearing lubricating performance of a submergeable motor by circulating lubricant in the motor through between the strands of the coil ends of a stator coil. CONSTITUTION:When a rotor shaft 16 rotates, lubricant of a hollow part 17 of the shaft 16 is exhausted by centrifugal force form a communication hole 18, and the lubricant in the exterior of the hollow part 17 is sucked from the hole 17' into the hollow part 17. Accordingly, the lubricant in the motor is circulated through the gap of the wire group forming the coil end 5, a communication passage 3 at the outer periphery of a stator core 2, a communication hole 11 of a reverse load side bracket 7, the hollow part 17 and the hole 18. In this manner, the temperatures of the coil and circulated lubricant can be lowered, and the sizes of the coil and stator core can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a submersible wake-up motor in which a lubricating fluid is sealed, and its purpose is to improve the cooling effect and the /181 cleaning performance of the bearing. That is.

In FIGS. 1 and 2, 1 and 2 denote a stator frame, 2 a stator core, and a plurality of communicating passages 8 formed in the axial direction on the outer periphery thereof. A stator winding group 4 is formed by bundling a plurality of water-resistant electric wires, and is inserted into each slot of the stator core 2. 5 is a winding end, and 6.7 is a load side bracket and an anti-load side bracket fixed to both end openings of the stator frame l, each having a bearing cylinder portion 8.9 extending inward.
Ru. 10.11 is a communication hole provided in the bearing cylinder portion 8.9, and 12.18 is a pair of cylindrical guides fixed inside both the brackets, the tips of which are close to the end portion 5 of each winding. There is. 14 and 15 are sleeve bearings, 16 is a rotor shaft, and has a hollow portion 17 that is open on the opposite load side.

18 is a plurality of communicating holes, 19 is a thrust disk, and 20 is a rotor core. Note that a lubricating liquid such as propylene glycol is sealed inside the *motor.

Since this invention is made as described above, when the rotor shaft 16 rotates, the liquid 17 in the hollow part of the rotor shaft 16 is moistened. The cord is discharged from the communication hole 18 by centrifugal force, and the lubricating liquid outside the hollow part 17 is sucked into the hollow part 17 from the opening 17/. Therefore, the /Ill fresh liquid in the electric motor is transmitted to the gaps between the wire groups constituting the winding end 5, the communication passage 8 on the outer periphery of the stator core 2, and the communication between the summer load side bracket 7, as shown by the arrows. Hole 11.
It circulates through the hollow part 17 and the communication hole 18.

As described above, the present invention circulates the lubricating fluid in the motor between the wires at the winding ends of the stator winding.
Therefore, heat dissipation at the end of one winding is promoted, and the temperature of the winding and the lubricant can be lowered. Therefore, due to the temperature drop in the windings, the windings and stator core can be made smaller, that is, the electric motor can be made smaller, and the viscosity of the lubricating fluid is less likely to decrease due to the temperature drop, which improves the lubrication performance. It has the effect of improving. Further, according to the present invention, a cavity is provided in the first rotor shaft, and a communication hole is provided to communicate the inside and outside of the cavity. The I liquid is automatically circulated within the motor, which has the effect of eliminating the need for special circulation pump blades.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing the entirety of an embodiment of the present invention;
FIG. 2 is an enlarged view of the winding end. In the figure, 2 is the stator core, 8 is the communication path, 4 is the stator winding, 6 is the winding end, 6 is the load side bracket, 7 is the anti-load side bracket), 8
．． Reference numeral 9 designates a bearing cylinder portion, 10.11 a communication hole, 12.18 a guide, 16 a rotor shaft, 17 a hollow portion, and 18 a communication hole. Agent Makoto Kuzuno - Figure 1 Figure 2

Claims (1)

[Claims] A stator frame to which a stator core is fixed, a communication path formed in the axial direction on the outer periphery of the stator core, a load-side bracket attached to openings at both ends of the upper fixed frame and having a bearing cylinder part. An anti-load side bracket, a communication hole provided in the bearing cylinder portion of the anti-load side bracket, a rotor shaft rotatably supported by both of the brackets and having a hollow portion with an open anti-load side, and a rotor shaft of the rotor shaft. A communication hole is provided near the load side and communicates the inside and outside of the hollow part of the rotor shaft, a guide is provided close to the end of the winding protruding from both ends of the stator core, and inside the stator frame. a lubricating liquid sealed in the rotor shaft, and the rotor shaft rotates to circulate waste liquid through the communication path on the outer periphery of the stator, the inside of the winding end, and the inside of the hollow part of the rotor shaft. shape electric motor.