JPH0541380U - Water-cooled sealed motor - Google Patents

Abstract

(57) [Summary] [Purpose] The shape of the hermetically sealed motor can be reduced and simplified while maximizing the area of the motor frame that can be used as a cooling surface and increasing the capacity, while maintaining easy and economical. It is an object to provide a structure of a water-cooled sealed motor. [Structure] A substantially circular flange provided on both outer peripheral sides of a frame of a hermetically sealed motor having a rotor, a horizontal rail connecting the flanges at the same height as the flange, and the flange. A side of the horizontal rail opposite to the load mounting portion, which has a water jacket that is wound along the outer periphery and has end faces that are formed so as to face each other on the surface of the horizontal rail and that is made of a flexible thin material. The connecting portion of the stator is arranged together with the sealed terminal block on the side close to the one flange located at.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for connecting a lead wire and a lead wire of a stator of a water-cooled hermetic motor having a cantilevered rotor, and in particular, a water-cooled hermetic seal integrated with a compressor whose outer peripheral surface is a cooling surface. The present invention relates to a structure for connecting a stator of a die motor and a lead-out structure for a lead wire.

[0002]

[Prior Art]

 Conventionally, with a drive motor that is integrated with a gas compressor, hydraulic pump, etc., the fluid filled inside the motor does not leak to the outside, and air, moisture, etc. from the outside does not leak inside. Sealed motors have been adopted that do not penetrate into.

In cooling the water of the hermetically sealed motor, it is possible to bring the cooling water into direct contact with a motor frame, a side cover or the like for cooling, and in particular, the motor frame can be used as a cooling surface. The most effective and preferable method has been adopted in which a water jacket is formed on the outer peripheral wall surface of the motor frame. In addition, in order to perform maintenance when water stains, rust, etc. occur, the outer jacket of the water jacket has a cylindrical shape and a detachable assembly structure is adopted.

Further, by integrating the load-side compressor and the drive motor, it is possible to make the drive motor main body also have a cantilever structure in the compressor installed on the pedestal. That is, the drive shaft rotatably disposed in the bearing on the compressor side is extended to the drive motor side to form a cantilever structure, and the rotor of the drive motor is fitted and fixed on the shaft to drive the drive shaft. It has a structure that excludes the motor bearing. Therefore, it is possible to eliminate mechanical friction loss such as bearings, which contributes to higher efficiency as a whole.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional cylindrical water jacket jacket structure, in order to make the jacket jacket detachable, the position of the terminal block from which the lead wire of the stator coil can be led out. There was no choice but to adopt a structure in which the drive was placed on the load side of the drive motor. Therefore, a space for leading the lead wire of the stator wheel and a space for connecting the phases of the wheel wheels are also provided on the load side of the stator.

Therefore, in order to interpose the space, the stator and the rotor are arranged apart from the load side, and the rotating shaft must be extended by the space. However, it is not desirable in the design as a cantilever structure.

Further, since the position of the terminal block of the lead wire is restricted to the load side as described above, the cooling area on the frame surface of the drive motor is also changed from the terminal block located in the load mounting portion to the frame. It was limited to the vicinity of the other end, making it difficult to expand beyond that.

In addition, when the cylindrical water jacket is attached or detached, if the installation leg is on the drive motor side, it will be an obstacle, so as described above, the drive motor main body must have a cantilever structure. It wasn't. Therefore, the size of the drive motor was limited to a small capacity as long as the motor main body had a cantilever structure.

In view of the drawbacks of the prior art, the present invention maximizes the area of a motor frame that can be used as a cooling surface while reducing the size and simplification of the shape of a hermetically sealed motor having a rotor cantilever structure, and increases the capacity. It is an object of the present invention to provide a water-cooled hermetically sealed motor structure that is easy to maintain and economical.

[0010]

[Means for Solving the Problems]

 In order to achieve the technical problem, the present invention provides a cooling structure for a hermetically sealed motor, including (1) substantially circular flanges provided on the outer peripheral sides of both ends of the hermetically sealed motor, and (2) the flange. A point that a horizontal rail connecting the flanges is provided at the same height as the height. (3) It is wound along the outer peripheral surface of the flange, and its end surface is formed so as to face the horizontal rail surface. A point provided with a water jacket that is made of a flexible thin material. (4) Wiring of a stator together with a sealed terminal block on the horizontal rail near the one flange located on the opposite side of the load mounting portion. Is provided so that the lead wire of the stator wheel can be led out through the terminal block.

In this case, the lead wire of the stator wire wheel wound around the fixed iron core of the electric motor, the wire connection between each wire wheel and the wire wheel phase, and the like are arranged on the side opposite to the load mounting portion. A large-capacity electric motor has a mounting leg at a position near the lower side of the flange, and the mounting leg is configured to be removable.

[0012]

[Action]

 According to this technical means, the end faces of the jacket are confronted with each other on the surface of the crosspiece by using one or a plurality of band-shaped clamps, and both end portions of the jacket are band-shaped bands. Since it is fastened to the outer peripheral surface of the flange, the outer peripheral surface of the motor frame and the water jacket formed by the flange and the water jacket have a liquid-tight structure. Further, since it is possible to provide a cooling water inlet / outlet together with the sealed terminal block on the horizontal rail, the cooling water can be circulated through the water jacket to directly cool the outer peripheral surface of the motor frame.

Therefore, since the sealed terminal block is arranged on the side of the horizontal rail that is close to the one flange located on the side opposite to the load mounting portion, the stator and the rotor are arranged close to the load mounting portion. It is possible to set up. Moreover, the rotating shaft for the rotor having a cantilever structure extending from the load side bearing does not needlessly extend in the axial direction, but contributes to shortening and thinning, and also to vibration resistance. The structural design of the part can be facilitated.

Further, according to the present invention, the lead wire of the stator wire wheel wound around the fixed iron core of the electric motor, the wire connections between the wire wires and the wire wheel phases, and the like are arranged on the side opposite to the load mounting portion. In addition, it is easy to connect the wiring. Further, according to the present invention, since the mounting leg is provided on the flange, the size of the motor main body can be increased, and the mounting leg located on the side opposite to the load mounting portion can be attached and detached. Because of this structure, the water jacket can be easily attached and detached, and maintenance work such as water stains and rust adhering to the outer peripheral surface of the motor frame can be facilitated.

[0015]

【Example】

 Hereinafter, embodiments of the present invention will be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the constituent parts described in this embodiment are not intended to limit the scope of the present invention to them, but are simple. It's just an example.

FIG. 1 is a front sectional view showing the structure of a hermetically sealed motor of a rotor cantilever structure according to an embodiment of the present invention, and FIG. 2 is a side sectional view taken along the line YY of FIG. Is. Reference numeral 1 is a gas compressor that serves as a load, and 2 is a water-cooled hermetic motor, which is directly connected to the compressor 1 via a load side flange 4a and is integrally formed.

Reference numeral 3 denotes a motor frame, which has substantially circular flanges 4 a and 4 b on the outer peripheral sides of both ends of the motor frame 3 and further has the same height as the flanges 4 a and 4 b. It has a horizontal rail 5 that connects between 4a and 4b. Here, the flanges 4a and 4b are flanges located on the compressor 1 side and the opposite side, respectively.

Reference numeral 6 denotes a flexible thin film water jacket that is wound around the outer peripheries of the flanges 4 a and 4 b and is gripped by a tightening band 12, and the end surfaces of the water jacket jacket 6 are adjacent to each other. Are formed so as to face each other on the surface of the horizontal rail 5, and the ends thereof are attached by a band-shaped metal fitting 11 for narrowing a watertight packing.

Thus, a water jacket space 7 is formed, which is surrounded by the outer peripheral surface of the motor frame 3, the inner wall surfaces of the flanges 4 a and 4 b, and the water jacket jacket 6 and is partitioned by the horizontal rail 5. On the compressor 1 side of the horizontal rail 5, a cooling water suction port 9 and a cooling water discharge port 10 are arranged in a row, and are connected to the water jacket space 7 so that water can be supplied and drained. A fold 13 is arranged on the outer peripheral surface of the motor frame 3 so that the cooling water can flow and meander on the surface of the frame 3 in a uniform manner.

On the other hand, the internal structure of the motor 2 is composed of a stator 20 and a rotor 25. The stator 20 includes a stator core 21 inserted and fixed to the inner peripheral surface of the motor frame 3, and a stator coil 22 wound around the core 21. Further, the rotor 25 is fitted on a tapered rotary shaft 26 that is supported as a cantilever structure on a bearing 27 fixed to a mounting side wall 28 of the compressor 1.

Further, the connection between the stator coils 22 and between the phases and the lead wire is performed by a connection portion 23 provided in the vicinity of the flange 4b located on the side opposite to the load attachment portion. Further, a sealed terminal block 24 made of an insulating material is provided on the flange 4b side of the horizontal rail 5, and the lead wire and the power source are connected via a sealed terminal 8 penetrating the sealed terminal block. ..

Since the connection portion 23 and the sealed terminal block 24 are provided in the vicinity of the flange 4b as described above, the stator core 21 and the rotor 25 are provided with an unnecessary space between them and the compressor 1. It is possible to arrange them sufficiently close to each other without placing them.

Next, when the capacity of the water-cooled hermetically sealed motor 2 becomes large and the weight of the motor body 2 cannot be cantilevered by simply mounting it on the load 1 via the flange 4a, the mounting leg 19 is set. Set up. The mounting leg 19 is erected so as to be assembled under the outer periphery of the lid 18 which covers the flange 4b.

Since the water-cooled hermetic motor 2 is configured as described above, in maintenance, if the installation leg 19 is assembled, it is disassembled and removed, and then the band-shaped metal fitting 11 and the tightening band 12 are removed. Finally, by removing the canopy jacket 6, it is possible to easily remove and clean the scales, rust, etc. attached to the inner surface of the canteen space 7. Since the assembly can be done in the reverse order of the above, even ordinary tools and workers can easily perform maintenance and inspection.

[0025]

[Effect of the device]

 As described above, according to the present invention, in the water-cooled sealed electric motor, the horizontal rails are continuously provided along the shaft center between the flanges at both ends, and the end surface of the jacket is opposed to the horizontal rails. In addition, a water jacket is wound around the outer peripheral surface of the flange to form a water jacket, and a sealing terminal block is fixed on the side of the horizontal rail that is close to the one flange on the side opposite to the load mounting portion. Since the connection portion of the child is provided, the work of connecting the lead wire of the stator coil and the terminal of the sealed terminal block can be easily performed. Moreover, the cantilever structure of the rotor, in which the stator and the rotor are arranged close to the load side, does not have an unnecessary space between the load side wall of the load mounting portion and the stator and the rotor, and is water-cooled. It is possible to provide a model electric motor. Further, the entire circumference of the motor frame excluding the horizontal rail can be used as a cooling surface by the cooling water, and as a result, it is possible to provide a downsized and large-capacity electric motor. Furthermore, even when a large capacity electric motor is required, a mounting leg can be assembled so that it can be assembled on the lower side near the flange on the side opposite to the load mounting part, and cantilever support for the frame and stator of the electric motor. As a result of the elimination of this problem, it is possible to provide a large-capacity water-cooled sealed electric motor that is reasonably structural. Further, according to the present invention, even in maintenance of the water-cooled sealed electric motor, it is possible to easily remove water stains, rust, etc. adhering to the outer peripheral surface of the frame by simply removing the water jacket. It is possible to provide. It has various remarkable effects.

[Brief description of drawings]

FIG. 1 is a sectional front view of a water-cooled sealed motor according to an embodiment of the present invention.

FIG. 2 is a side sectional view taken along the line YY of FIG.

[Explanation of symbols]

 1 Load 2 Sealed Motor 3 Frame 4a, 4b Flange 5 Side Rail 6 Water Jacket 19 Installation Leg 20 Stator 23 Connection Part 24 Sealed Terminal Block

Claims (3)

[Scope of utility model registration request] 1. A substantially circular flange provided on both outer peripheral sides of a frame of a hermetically-sealed motor whose rotor is a cantilever structure, and a horizontal rail connecting the flanges at the same height as the flange. It has a water jacket that is wound around the outer circumference of the flange and that has its end faces made of a flexible thin material that can face each other on the surface of the cross rail. A water-cooled hermetically sealed motor characterized in that the wire connecting portion of the stator is arranged together with the hermetically sealed terminal block on the side rail adjacent to the first flange. 2. The water cooling system according to claim 1, wherein a lead wire of a stator wire wheel wound around a fixed iron core of the electric motor, a wire wire connecting portion between the wire wires and wire wheel phases, and the like are arranged on the side opposite to the load mounting portion. Hermetic motor 3. The water-cooled hermetically sealed motor according to claim 1, wherein a mounting leg is provided near the lower side of the flange, and the mounting leg is configured to be removable.