JP2009284609A - Power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power generator having a supporting member wherein a damage to be caused to a generator and a peripheral device including a casing thermally expanded when a motor is operated is reduced, a breakage of the supporting member is prevented, and a stable operation of the power generator is provided. <P>SOLUTION: The power generator 1 is equipped with: a generator body 2 having a cylindrical casing 21; a first supporting member 3 having a first supporting plate 32 for supporting its end on the side where it is connected with a different peripheral device 5 in the direction of the length of the casing 21 in the direction of the circumference of the casing 21; and a second supporting member 4 having a second supporting plate 42 that supports its end on the side where the peripheral device is not connected in the direction of the circumference of the casing 21 and is flexibly deformable. A cut 42a and a pair of openings 42b, 42b that respectively connect to both ends thereof and are opened, and are in a partial arc shape, are formed substantially in the center of the upper end of the second supporting plate 42. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric motor including a support member.

  A generator such as a dynamo device or an engine is often used while being supported by a support member attached to a stable pedestal. The main body portion of the generator is provided with a cylindrical casing that accommodates a motor or the like, and the casing is typically supported by a support member. However, since the motor generates high heat during operation, the casing may expand due to thermal expansion, and thermal deformation such as warping and bending may occur. In particular, in a dynamo device having a casing with a large ratio between the total length and the diameter, so-called L / D ratio, when thermally expanded by the operation of the motor, the amount of thermal deformation (expansion amount, elongation amount) in the full length direction becomes large, When the dynamo device is connected to the peripheral device by a bearing, in addition to the warping and bending of the casing, an excessive twisting force is generated between the bearing and the shaft supported by the bearing, and the alignment of the bearing is distorted. This may cause inconveniences such as the bearing being damaged or being unable to rotate smoothly due to an increase in the temperature or seizure of the bearing. In addition, there is a possibility that a connection mechanism (such as a bearing, a coupling, etc.) with the power generation device may be damaged or the operation of the peripheral device may not be performed smoothly.

Therefore, the present applicant has stably stabilized the main body portion of the generator including the casing while suppressing the damage to the casing and the influence on peripheral devices as much as possible even if the casing is thermally expanded due to the operation of the motor. Support members that can be supported have been proposed (see Patent Document 1). The support member described in the same document (in the notation in the same document, “support device”) has a pair of support plates that support both ends in the longitudinal direction of the casing, and the end of the casing that is not connected to the peripheral device The support plate (second support plate) that supports the base plate is thinner than the other support plate, and a cutout is formed on the upper surface of the second support plate that faces the surface of the casing. With such a configuration, in the generator (dynamo device) described in the same document, the thermal expansion of the casing is absorbed by the deformation of the thin support plate, and the expansion is extended to the side opposite to the peripheral device to escape. Therefore, the thermal deformation of the casing is suppressed.
JP2007-205928

  As described above, even in the support member described in Patent Document 1 in which damage to the casing and the generator is reduced, in the vicinity of the end of the notch formed on the upper surface facing the casing surface in the second support plate. Since a relatively large stress acts when the casing is deformed as the casing expands in the longitudinal direction due to thermal expansion due to the operation of the motor, the second support plate may be damaged from the end of the notch. Conceivable.

  As another problem, in this type of generator, the center of gravity of the main body of the generator is positioned low by reducing the height of the shaft passing through the center of the casing (center height) as much as possible. There is a desire to stabilize the operation of a generator.

  Accordingly, the present invention can prevent damage to the generator and peripheral devices including a casing that thermally expands when the motor is operated, prevent damage to the support member, and can also realize stable operation of the generator. The main object is to provide a generator having a support member.

  That is, the present invention supports a generator body having a cylindrical casing whose longitudinal direction is the central axis direction and an end portion on the side connected to other peripheral devices in the longitudinal direction of the casing in the circumferential direction of the casing. A first support member having a first support plate, and a second support having a second support plate that can be flexibly deformed by supporting the end of the casing in the longitudinal direction to which no other peripheral device is connected in the circumferential direction of the casing. Forming a notch in the substantially central portion of the upper end portion of the second support plate, and forming a pair of opening portions that form a partial arc that opens to communicate with both side end portions of the notch. This is a generator characterized by As the cylindrical casing, an appropriate one such as one having a circular cross-sectional shape in the longitudinal direction or a polygon (including a regular polygon) may be applied. In the present invention, the casing may be cylindrical. The same effect can be obtained regardless of the shape.

  If the generator has a configuration in which the casing is supported by such a first support member and a second support member, first, the first support member having the first support plate is connected to another peripheral device of the casing. While the side is firmly supported, the second support member having the second support plate that can be flexibly deformed is configured to support the side that is not connected to the peripheral device. When the thermal expansion occurs, the casing does not extend to the peripheral device side, and the casing is extended to the side opposite to the peripheral device by bending of the second support member, so that the peripheral device and the connection member are not adversely affected. Can absorb heat deformation. In addition, since both the first support plate and the second support plate support the end of the casing in the circumferential direction, when the casing is viewed from the longitudinal direction, the right-and-left falling rigidity is increased and the motor is stably operated. Can be operated.

  In particular, regarding the bending of the second support member, since the second support plate itself can be flexibly deformed and the notch as described above is formed at the upper end portion, the rigidity in the longitudinal direction of the casing is increased. It can be made smaller and easier to bend, and can be released by being expanded by thermal expansion while stably supporting the casing. Furthermore, since the partial arc-shaped openings are formed in communication with both end portions of the notches, the stress applied to the end portions of the notches when the second support plate is bent is preferably released, so that the second support Damage to the plate itself can be prevented.

  Further, since the notch and the opening continuous therewith are formed in the second support plate, the second support plate in the present invention has a notch opening formed in the conventional second support plate described above. Since it is possible to form a substantially wide opening, the center of gravity (center height) of the casing is positioned at a low position and the center of gravity is lowered according to the spread. It is also possible to realize the operation of the motor. Further, since the opening formed by the notch and the opening formed in the second support plate is wide, the air passage between the casing and the second support plate is widened, and the surface area of the second support plate is increased. For this reason, it is possible to improve the heat dissipation of the casing.

  In particular, if the notch formed in the second support plate forms a space between the second support plate and the casing, the center height of the casing is improved while improving the flexibility of the second support plate. Can be easily set to a low position.

  In such a generator of the present invention, in order to achieve both strong support to the casing by the first support plate and flexible support to the casing by bending of the second support plate, the thickness of the second support plate It is effective to make the thickness smaller than the thickness of the first support plate.

  In addition, in order to allow the second support plate to bend moderately in the longitudinal direction of the casing while maintaining a high fall rigidity to the casing, the second support plate is provided with an allowance for attachment to the casing at both left and right ends thereof. It is preferable that a notch is formed between both mounting allowances, and an opening is formed in the vicinity of both mounting allowances.

  Furthermore, in order to ensure stable support to the casing by the second support plate, it is desirable that the second support plate has a bilaterally symmetric shape.

  According to the present invention, the first support plate and the second support plate that support the casing in the circumferential direction effectively prevent the falling of the motor during operation, and the end on the peripheral device side is prevented by the first support plate. By supporting with high rigidity, the thermal expansion of the casing due to the motor operation is not affected to the peripheral device and other connecting devices, and the second support plate is bent to prevent the thermal expansion of the casing from the peripheral device. Can be escaped by extending to In particular, the second support plate is formed with a notch formed at the center of the upper surface so as to face the casing and partial arc-shaped openings formed at both ends of the notch. Sometimes the stress applied to the end of the notch can be relieved to effectively prevent the second support plate from being damaged, and the center height of the casing (shaft height position; center height) can be lowered to reduce the generator It is possible to lower the center of gravity of the main body and enable stable operation. Furthermore, the heat dissipation of the casing can be improved by the notch and the opening formed in the second support plate.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a dynamo device 1 as a kind of generator according to the present embodiment as seen from the front side, FIG. 2 is a perspective view of the dynamo device 1 as seen from the back side, and FIG. FIG. 4 is a side view of the dynamo device 1. FIG. 5 is a schematic sectional side view of the dynamo device 1. This dynamo device 1 is used, for example, as an automobile test device or the like, and includes a dynamo device main body 2 covered with a casing 21, and a first support member 3 and a second support member 4 that support the casing 21. ing.

  Since the dynamo device main body 2 is the same as that in the conventional dynamo device, it will be briefly described. FIG. 5 shows main internal parts of the dynamo device main body 2. In this embodiment, the dynamo device body 2 includes a cylindrical casing 21 having a longitudinal dimension in the horizontal direction, a cylindrical stator core 22 disposed inside the casing 21, and a rotor 23 disposed inside the stator core 22. , A first shaft 24 provided with the center aligned with one end of the rotor 23, and a second shaft 25 provided with the center aligned with the other end of the roller 23. The first shaft 24 and the second shaft 25 are rotatably supported by bearings 26a and 26b provided at the center portions of the front wall 21a and the rear wall 21b of the casing 21, respectively. It is made rotatable by 26a, 26b. The peripheral device 5 (see FIG. 5) is connected to the first shaft 24 via the output shaft 27. The output shaft 27 rotates together with the rotor 23 and the first shaft, and transmits the rotational force of the rotor 23 to the peripheral device 5. Here, the rotation axes (center axes) of the rotor 23, the first shaft 24, the second shaft 25, and the output shaft 27 are in a straight line (hereinafter referred to as an axis m. Shown by a one-dot chain line in FIGS. 4 and 5). Match up. Examples of the peripheral device 5 include a speed reducer, a driven device, an additional device, and a bearing.

  The first support member 3 and the second support member 4 are respectively provided on the floor surface F and support the casing 21. In the present embodiment, the axis m of the dynamo device body 2 is supported horizontally. . The first support member 3 supports the end portion of the casing 21 on the peripheral device 5 side, and the second support member 4 supports the end portion of the casing 21 opposite to the peripheral device 5. .

  Specifically, the first support member 3 includes a flat plate-like first bottom plate 31 fixed to the floor surface F with bolts 31a (see FIG. 5, omitted in other drawings), and a bottom surface thereof by welding or the like. The first support plate 32 is fixed to the bottom plate 31. The first support plate 32 is made of a relatively thick metal plate, and is arranged with the direction substantially orthogonal to the axis m as the width direction, and corresponds to the curved shape on the bottom side of the peripheral wall 21c of the casing 21. The casing 21 is supported in the circumferential direction by fixing the curved upper surface to the peripheral wall 21c of the casing 21 by welding or the like.

  Similar to the first support member 3, the second support member 4 includes a flat plate-like second bottom plate 41 fixed to the floor surface F with bolts 41 a (see FIG. 5, omitted in other drawings), and a bottom surface. And a second support plate 42 fixed to the second bottom plate 41 by welding or the like. The second support plate 42 is made of a metal plate that is thinner than the first support plate 32 and can be flexibly deformed. The second support plate 42 is disposed with the direction substantially perpendicular to the axis m as the width direction. The casing 21 is supported in the circumferential direction by fixing both end portions 42c, 42c of the upper surface curved corresponding to the curved shape on the bottom side of the peripheral wall 21c to the peripheral wall 21c of the casing 21 by welding or the like. Yes. That is, both side end portions 42 c and 42 c on the upper surface of the second support plate 42 function as an attachment allowance (welding allowance) to the casing 21. The second support plate 42 has an upper surface at a position slightly lower than the peripheral wall 21c of the casing 21 over the inner side of both side end portions 42c and 42c, which is an attachment allowance to the casing 21, and the upper surface of the peripheral wall 21c of the casing 21. A notch 42a having an arcuate shape that is curved so as to be separated from the surface is formed. Further, openings 42b and 42b each having a partial arc shape are formed at both end portions of the notch 42a so as to communicate with the space between the second support plate 42 and the casing 21 by the notch 42a. ing. The notches 42a and the openings 42b and 42b are formed so as to penetrate the thickness of the second support plate 42. The second support plate 42 having such a shape is formed to have a bilaterally symmetric shape when viewed from the front or the back with the axis m as the front-rear direction.

  Thus, by providing the second support plate 42 with the notches 42a and the openings 42b and 42b that form a continuous space between the casing 21 and the second support plate 42, the thickness of the second support plate 42 is the first support. Combined with being thinner than the plate 32, the rigidity of the second support plate 42 in the axial center m direction is made smaller than the rigidity of the first support plate 32 in the axial center m direction. However, the rigidity in the width direction of the first support plate 32 and the second support plate 42, in other words, the rigidity in the direction of tilting in the direction perpendicular to the axis m of the casing 21 is sufficiently secured. In particular, in a plane orthogonal to the axial center m where the thickness of the second support plate 42 exists, both side ends 42c, 42c of the second support plate 42 are positioned at a position of approximately 45 ° obliquely downward to the left and right from the axial center m. Is positioned and welded to the casing 21 to secure the falling rigidity of the second support plate 42 with respect to the casing 21.

  In the dynamo device 1 according to the present embodiment having the above-described configuration, when the casing 21 is heated and expands with the operation of the rotor 23, the end on the peripheral device 5 side has a large wall thickness in the axial center m direction. Since the first support member 3 having the first support plate 32 having high rigidity is not deformed, the end opposite to the peripheral device 5 has a small thickness and has a notch 42a and an opening 42b. As shown by an imaginary line in FIG. 6 because it is supported by the second support member 4 provided with the second support plate 42 that has been actively reduced in rigidity in the direction of the axis m by forming 42b. The second support plate 42 extends to the side opposite to the peripheral device 5 while being flexibly deformed. Therefore, the thermal expansion of the casing 21 can be absorbed by the expansion of the second support member 42 with the flexible deformation. Therefore, warping and bending due to the thermal expansion of the casing 21 can be suppressed, so that the internal members of the dynamo device body 2 such as the rotor 23, the first shaft 24, the second shaft 25, the output shaft 27, and the peripheral device 5 are damaged. The dynamo device main body 2 can be operated without giving

  Further, since the openings 42b and 42b are formed in communication with the both side end portions of the notches 42a formed in the upper end portion of the second support plate 42 of the second support member 4, the second support plate 42 and the casing are formed. Thus, the space between the main body 21 and the main body 2 including the casing 21 can be lowered. Thus, the dynamo device body 2 can be operated more stably. Furthermore, by forming the notch 42a and the openings 42b and 42b, the space between the casing 21 and the second support member 42 is expanded, so that the passage of air is widened and the surface area of the second support member 42 is also increased. Since it becomes large, the heat dissipation effect to the casing 21 can also be improved.

  In addition, this invention is not limited to embodiment mentioned above. For example, the second support plate 42 ′ in the second support member 4 ′ shown in FIG. 7 has openings 42 b ′ and 42 b ′ formed at both end portions of the notch 42 a ′ so as to contact the peripheral wall 21 of the casing 21. These are formed continuously from both side end portions 42c ′ and 42c ′, which are upper surface mounting margins. By doing in this way, the center height (height position of the shaft center m) of the casing 21 can be further lowered, and it can contribute to the operation of the dynamo device main body 2 more stably. In the figure, since the configuration other than the second support plate 4 is the same as that of the above-described embodiment, the same reference numerals are used without particular description.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The front perspective view which shows the dynamo apparatus which concerns on one Embodiment of this invention. A rear perspective view showing the dynamo device. The side view which shows the dynamo apparatus. The rear view which shows the dynamo device. The typical sectional view of the dynamo device. The side view which shows typically the state of the expansion | extension of the casing at the time of the action | operation of the dynamo apparatus. The rear view which shows the other example of the dynamo device.

Explanation of symbols

1 ... Dynamo device (generator)
2 ... Dynamo device body (generator body)
DESCRIPTION OF SYMBOLS 3 ... 1st support member 4 ... 2nd support member 5 ... Peripheral device 21 ... Casing 31 ... 1st support plate 41 ... 2nd support plate 41a ... Notch 41b ... Opening part 41c, 41c ... Side edge part (mounting allowance)

Claims (5)

A generator body including a cylindrical casing having a longitudinal direction as a central axis direction;
A first support member having a first support plate for supporting an end portion on the side connected to another peripheral device in the longitudinal direction of the casing in the circumferential direction of the casing;
A second support member having a second support plate that can be flexibly deformed by supporting an end of the casing in the longitudinal direction to which no other peripheral device is connected in the circumferential direction of the casing;
A notch is formed in a substantially central portion of the upper end portion of the second support plate, and a pair of openings that form a partial arc shape that opens to communicate with both side end portions of the notch are formed. A featured generator. The generator according to claim 1, wherein the notch forms a space between the second support plate and the casing. 3. The generator according to claim 1, wherein a thickness of the second support plate is thinner than a thickness of the first support plate. The second support plate is formed with attachment allowances to the casing at both left and right end portions, the notch is formed between both attachment allowances, and the opening portions are respectively provided close to the attachment allowances. The generator according to any one of claims 1 to 3, wherein the generator is formed. The generator according to any one of claims 1 to 4, wherein the second support plate has a symmetrical shape.

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