JP3047638B2 - Liquid cooling motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow path structure for flowing a cooling liquid in a liquid cooling motor. Since it is a liquid cooling system, it is particularly suitable when a small, high-output, high-speed rotation is required.

[0002]

2. Description of the Related Art Liquid-cooled motors have a higher cooling capacity than air-cooled motors, so the temperature of each part of the motor rises due to continuous high load, heat loss at high speed rotation due to iron loss, mechanical loss, etc. It is possible to keep it low. However, this liquid-cooled motor requires a flow path for flowing a cooling liquid. Conventionally, as shown in Japanese Unexamined Patent Publication No. 2-55551, a complicated process for forming an upper plug with a large number of holes in front and rear end casings is required. I needed to.

[0003] The structure of a casing of a conventional liquid-cooled motor will be described below. FIG. 4 shows a structure of a conventional casing and a flow path of a coolant. The casing comprises a central casing 10, a front end casing 12, and a rear end casing 14, and constitutes a substantially quadrangular prism-shaped motor casing. FIG. 5 is a perspective view of the central casing 10, and a pair of through holes 1 through which the coolant flows in the longitudinal direction.
5a and 15b are formed at the time of casting. The through hole 15a is a forward path for flowing the coolant toward the front end casing 12, and the other through hole 15b is a return path for returning the coolant to the rear end casing 14. FIG. 6 is a front view of the front end casing, and FIG. 7 is a sectional view taken along the line II-II. Eight longitudinal holes 16 and eight vertical transverse holes 18 are provided to form the flow path shown in FIG. 4, and a plug 24 is required in the vertical transverse hole. This is the same for the rear end casing.

[0004]

However, the above-mentioned conventional construction has a problem that the vertical side holes and the plugs in the front and rear end casings cannot be cast and require additional processing, which increases the cost. .

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a cooling liquid flow path structure for a liquid-cooled motor which is inexpensive to process.

[0006]

In order to achieve this object, a liquid cooling motor cooling liquid flow path structure according to the present invention comprises a front end casing, a center casing, and a rear end casing which are arranged in parallel in the longitudinal direction. In a motor constituting a casing of an electric motor or a motor having a seal packing between a front and rear end casing and a central casing, the central casing has a plurality of pairs substantially equally arranged in a circumferential direction thereof. Are formed so as to penetrate in the longitudinal direction, and grooves are provided in the front and rear end casings or the seal packing to communicate the respective flow paths in the central casing.

[0007]

In the center casing, a cooling channel is formed only in the longitudinal direction, so that casting can be easily performed. In the front and rear end casings, one of the through channels provided in the central casing is provided. Since the flow path can be formed only by providing a groove at a position communicating with the outward path and another return path, it can be easily manufactured by casting.

[0008] Further, even when a groove is provided in the seal packing, it can be easily manufactured by molding.

[0009]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a front end casing according to the present invention, and FIG. 2 is a sectional view taken along the line II of FIG. The front end casing 2 has through holes 15a and 1
5b is provided for communicating 5b. Similar grooves are also provided in the rear end casing, and by passing through them, each part is cooled while the coolant flows through the path shown by the arrow in FIG.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In FIG.
Reference numerals 3 and 4 denote sealing packings provided between the front end casing 2 and the rear end casing 5 and the central casing 10. Embodiment 1 also has such a structure.
The same effects can be obtained by providing the same seals as the grooves 1 provided in the front end casing 2 in the sealing packings 3 and 4. In this case, it is needless to say that the grooves 1 are required in the front end casing 2 and the rear end casing 5.

[0011]

As described above, according to the present invention, the flow path for circulating the coolant can be formed by the through holes in the central casing and the grooves provided in the front and rear end casings or the seal packing. Therefore, it is possible to provide a motor having a coolant flow path which is easy and inexpensive to manufacture.

[Brief description of the drawings]

FIG. 1 is a front view of a front end casing according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 is a configuration diagram of a liquid-cooled motor casing according to a second embodiment of the present invention.

FIG. 4 is a diagrammatic perspective view of a coolant flow path of a casing.

FIG. 5 is a perspective view of a central casing.

FIG. 6 is a front view of a conventional front end casing.

FIG. 7 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Groove 2,12 Front end casing 3,4 Seal packing 5,14 Rear end casing 10 Central casing 15a, 15b Through hole 16 Longitudinal hole 18 Vertical horizontal hole 24 Plug

Claims (1)

(57) [Claims] 1. A motor constituting a casing of an electric motor in which a front end casing, a center casing and a rear end casing are juxtaposed in its longitudinal direction, In the motor having a seal packing in between, a plurality of pairs of flow passages substantially equally arranged in the circumferential direction are formed in the central casing so as to penetrate in the longitudinal direction, and the front and rear end casings or the seal are formed. A liquid cooling motor, wherein a groove is provided in the packing for communicating each flow path of the central casing.