JP2006296010A - Hermetic compressor - Google Patents

Abstract

[PROBLEMS] To suppress and relieve tightening stress due to shrinkage or press fitting in a stator in which a stator laminated core assembly formed by laminated steel plates punched by a die is wound on a shell shell of a hermetic compressor. The stator of the concentrated winding motor for compressors that enables
A stator core assembly 11 of a concentrated winding motor for a compressor includes a stator slot 12, a stator teeth 13, a stator yoke 14, and a refrigerant passage 21, and a tightening stress suppressing end plate 15 is provided. By disposing the stator laminated core assembly 10 at both end faces, the tightening stress applied to the stator core assembly 11 is suppressed and alleviated when being shrinked or press-fitted into the shell 20 and concentrated for the compressor due to the tightening stress. Suppresses performance degradation of the winding motor.
[Selection] Figure 2

Description

  The present invention relates to a hermetic compressor, which suppresses a tightening stress generated by shrinking or press-fitting a stator of an electric motor inside a shell shell with a tightening stress suppressing end plate provided on both end faces of the stator laminated core assembly. Thus, the present invention relates to a motor stator structure of a hermetic compressor that can suppress and mitigate an increase in stator iron loss caused by the tightening stress and can improve the performance of the motor after the compressor is incorporated.

Conventionally, a stator of an electric motor for a compressor is generally subjected to shrinking or press-fitting in order to fix the stator to a compressor shell. However, depending on the shell shell manufacturing process, it is difficult to ensure the dimensional accuracy and cylindricity of the shell shell inner peripheral side, and due to the high rigidity of the material, when the stator is shrinked or pressed into the shell shell, Uneven tightening stress is applied from the outer peripheral side of the stator that is in contact with the inner peripheral side of the shell, and the motor performance is reduced due to deterioration of the magnetic properties of the stator laminated core assembly that is stamped and formed of laminated steel sheets. (For example, refer nonpatent literature 1). As countermeasures against the tightening stress, for example, the influence of the tightening stress by the compressor manufacturing method (for example, see Patent Document 1) and the tightening stress effect by the manufacturing method of the stator core assembly (for example, see Patent Document 2) are performed. Some have.
JP 2001-304123 A JP 2001-238376 A RM-98-131 “Effect of tightening strain on rotating machine core performance” Shin Nippon Steel Co., Ltd.

  However, in the conventional configuration, in order to prevent the stator from dropping due to pressure expansion inside the hermetic compressor during compressor operation, or the stator from dropping due to mechanical impact, etc., the compressor shell is generally used. The inner circumferential dimension is manufactured to be about 50 to 200 μm smaller than the outer diameter dimension of the stator core assembly of the electric motor, and the stator is shrinked or press-fitted into the inner shell. The shell shell is formed by winding a flat steel plate with low rigidity in a roll shape and welding the joint, but the shell shell inner peripheral shape manufactured by this method is an ellipse. The direction of the welding position of the joint is an ellipse long axis, so the inside of the shell shell is corrected from an elliptical shape to a circular shape with a tube expansion machine before shrinking the stator. Cylindricity cannot be ensured. Therefore, when the inner surface of the shell shell is elliptical and the stator of the motor formed by the laminated steel plate and punched with a highly accurate dimension is subjected to shrinkage and the like on the shell shell, the stator core assembly is In response to the tightening stress by the shell, stress strain is generated in the local part of the stator core assembly. The influence of the stress strain has the problem that the performance of the motor for the compressor is lowered depending on the interference between the shell shell and the stator core assembly, the cylindricity of the inner periphery of the shell shell, the rigidity of the material, and the like. It was.

  The present invention solves the above-mentioned conventional problems. When shrinking or press-fitting a stator of an electric motor into a shell shell of a hermetic compressor, the tightening allowance of the shell shell, cylindricity, material rigidity, etc. An object of the present invention is to provide a stator core assembly of a motor for a compressor for suppressing and alleviating tightening stress strain due to influence.

  In order to solve the above-described conventional problems, a stator of a concentrated winding motor for a hermetic compressor according to the present invention includes a stator laminated core assembly having a refrigerant passage in a radial direction of a tooth portion formed between adjacent slots. And a clamping stress suppressing end plate configured in the same shape as the stator stacking core on both end faces of the stator stacking core assembly, and the clamping stress suppressing end plate has a thickness of one stator stacking core. The stator stack core assembly and the tightening stress suppressing end plate are integrated by an arbitrary fixing method, and the tightening stress can be suppressed and relaxed by the shell shell. It is what.

  As a result, the tightening stress acting on the outer peripheral side of the stator in contact with the inner peripheral side of the shell shell of the compressor is suppressed / relieved by the tightening stress suppressing end plate, and the stator which is the main magnetic circuit due to the tightening stress strain It is possible to avoid an increase in iron loss at the yoke, and it is possible to suppress a decrease in performance of the compressor motor.

  The stator of the motor for a hermetic compressor of the present invention includes a stator laminated core assembly having a refrigerant passage in the radial direction of the slot portion, and the same shape as the stator laminated core on both end faces of the stator laminated core assembly. A tightening stress suppressing end plate, wherein the tightening stress suppressing end plate has a thickness t that is at least three times the plate thickness of the single stator laminated core; And the tightening stress suppressing end plate are integrated by an arbitrary fixing method, thereby suppressing and relaxing the tightening stress by the shell.

  As a result, the tightening stress acting on the outer peripheral side of the stator in contact with the inner peripheral side of the shell shell of the compressor is suppressed / relieved by the tightening stress suppressing end plate, and the stator which is the main magnetic circuit due to the tightening stress strain It is possible to avoid an increase in iron loss at the yoke, and it is possible to suppress a decrease in performance of the compressor motor.

  The stator of the motor for a hermetic compressor according to the present invention increases the outer diameter of the rotor when the inertia effect of the rotor is used as a countermeasure against torque fluctuations that occur during low-speed operation, such as a one-piston rotary compressor. This method is effective, and the inner diameter of the stator inevitably increases accordingly. As a result, the core part of the outer periphery of the stator and the bottom of the slot, that is, the width of the stator yoke is narrowed, but the tightening stress suppressing end has a thickness more than three times the plate thickness of one stator laminated core. The stator is assembled by arranging a plate on both end faces of the stator laminated core assembly and integrating the stator laminated core assembly and the tightening stress suppressing end plate by an arbitrary fixing method. The tightening stress generated when shrinking or press-fitting into the inner shell of the compressor can be suppressed / relieved.

  A first invention is a stator of a concentrated winding electric motor fixed to a shell shell of a hermetic compressor by shrinkage or press fitting, and a plurality of slots in an arbitrary shape formed of laminated steel plates by punching with a mold And a stator laminated core assembly having a refrigerant passage in a radial direction of a tooth portion formed between adjacent slots, and clamping stress suppressing end plates on both end faces of the stator laminated core assembly, and the clamping stress The restraining end plate has a thickness t that is at least three times the thickness of one stator laminated core, and is configured in the same shape as the stator laminated core, and the stator laminated core assembly and the tightening By integrating the stress suppressing end plate, the tightening stress applied to the stator when shrinking or press-fitting on the outer peripheral side of the stator in contact with the inner peripheral side of the shell shell is caused by the tightening stress suppressing end plate. Suppress and pressure It is possible to suppress the performance degradation of the machine electric motor.

  According to a second aspect of the present invention, there is provided a stator of a concentrated winding electric motor fixed to a shell shell of a hermetic compressor by shrinkage or press-fitting, and a plurality of slots having an arbitrary shape formed by punching with a mold and formed of laminated steel sheets. And a stator laminated core assembly having a refrigerant passage in the radial direction of the slot portion, and a clamping stress suppressing end plate on both end faces of the stator laminated core assembly, the clamping stress suppressing end plate being a stator laminated core The stator has a thickness t that is at least three times the thickness of one sheet, and has the same shape as the stator laminated core. The stator laminated core assembly and the tightening stress suppressing end plate are integrated. Thus, on the outer peripheral side of the stator that is in contact with the inner peripheral side of the shell shell, the tightening stress applied to the stator when pressed or pressed is suppressed by the tightening stress suppressing end plate, and the performance of the compressor motor Suppress the decline Door can be.

  According to a third aspect of the invention, in particular, in the stator of the concentrated winding motor for a compressor of the second aspect of the invention, a stator laminated core assembly having a plurality of slots and a refrigerant passage in the radial direction of the slot portion in an arbitrary shape; Clamping stress suppressing end plates are provided at both end faces of the stator laminated core assembly, and the clamping stress suppressing end plates are provided with a stator holding force auxiliary protrusion at the center position of the refrigerant passage portion of the stator laminated core assembly. The stator laminated core assembly and the tightening stress suppressing end plate are integrated to improve the holding power of the stator by shrinkage or press-fitting and to be in contact with the inner peripheral side of the shell shell On the outer peripheral side of the child, it is possible to suppress the tightening stress applied to the stator when shrinking or press-fitting, and it is possible to suppress the performance deterioration of the compressor motor.

  4th invention is the outer periphery which is contacting the trunk | drum shell inner peripheral side especially in the stator lamination | stacking core assembly which comprises the stator of the concentrated winding motor for compressors of any one invention of 1st-3rd invention By making the dimension smaller than the outer peripheral dimension of the clamping stress suppressing end plate integrated with both end faces of the stator laminated core assembly by the thickness d or less of one stator laminated core, the shell shell inner peripheral side Therefore, the tightening stress applied to the stator when shrinking or press-fitting can be suppressed and alleviated, and the performance deterioration of the compressor motor can be suppressed.

  In the fifth aspect of the invention, the slot shape of the tightening stress suppressing end plate constituting the stator of the concentrated winding electric motor for a compressor according to any one of the first to fourth aspects is applied to both end faces of the stator core assembly. In an electric motor stator in which a winding insulation insulator is attached and insulation paper is applied in a stacking direction in a slot of the stator core assembly, the winding insulation insulator is disposed on both end faces of the stator laminated core assembly. In order to engage with the tightening stress suppressing end plate, the thickness of the engaging portion of the winding insulation insulator is made larger than the slot shape of the stator laminated core, and the engaging portion depth of the winding insulating insulator is suppressed with the tightening stress suppression. By using the thickness of the end plate, the slot shape of the stator laminated core that forms the stator laminated core assembly that becomes the main magnetic circuit is increased by the thickness of the winding insulation insulator fitting portion. And, since it is not necessary to configure the slot portion shape by the winding insulation insulator fitment portion depth, it is possible to suppress the performance degradation of the motor for compressor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a sectional view of a hermetic rotary compressor according to an embodiment of the present invention.

  In FIG. 1, a tightening stress suppressing end plate 15 is provided in a stator laminated core assembly 10 that is punched with a mold and formed of laminated steel plates, and the stator 1 with windings 3 is baked to the inside of the shell 20. Alternatively, the compression mechanism 22 is fixed by welding or the like from the outside of the shell 20, and the rotor 2 is fixed to the compression mechanism 22 by shrinking or press fitting. The stator 1, the compression mechanism 22 and the rotor 2 are integrated. Further, most of the oil contained in the refrigerant by the operation of the compressor is separated from the refrigerant inside the hermetic compressor and stored in the oil reservoir 23, and the refrigerant is sent to the refrigeration cycle from the discharge pipe 24 of the hermetic compressor.

  The operation, action, and effects of the stator of the motor for a hermetic compressor configured as described above will be described below.

  First, FIG. 2 shows a stator core assembly 11 in which the tightening stress suppressing end plate 15 having a plate thickness t and the stator laminated core assembly 10 are integrated into the shell shell 20 according to the first embodiment. FIG. 3 is a view showing a refrigerant passage 21 secured by a notch located in a radial direction of the trunk shell 20 and the stator teeth 13 of the stator core assembly 11.

  In FIG. 2, a clamping stress suppressing end plate 15 is provided on both end faces of the stator laminated core assembly 10, and the clamping stress suppressing end plate 15 has a thickness t that is at least three times the thickness of one stator laminated core. 1 and is configured in the same shape as the stator laminated core, the fastening stress suppressing end plate 15 and the stator laminated core assembly 10 are integrated, and the stator of the electric motor stator 1 shown in FIG. The core assembly 11 includes a plurality of stator slots 12 arranged in a radial direction from the center of the stator core assembly 11, and stator teeth 13 configured between the stator slots 12. The refrigerant passage 21 is arranged in the radial direction of the stator teeth 13.

  Here, the compressor shell 20 prevents the stator from dropping due to the pressure expansion inside the hermetic compressor during operation of the compressor, or the stator from dropping due to mechanical impact of the hermetic compressor, etc. In particular, the inner diameter of the shell shell of the compressor is smaller than the outer diameter of the stator core of the motor by about 50 to 200 μm.

  Further, in the case of a wound shell type in which the shell shell 20 is formed by winding a flat steel plate with low rigidity in a roll shape and welding the joint portion, the inner peripheral side shape of the shell shell 20 manufactured by the present construction method Is an ellipse, and generally the direction of the weld position of the joint is the major axis of the ellipse. Therefore, before the stator 1 shown in FIG. 1 is squeezed or the like, the cylindrical shell is corrected by changing the inner peripheral side of the shell shell 20 from an elliptical shape to a circular shape by a tube expander. 1 cannot be ensured, and when the stator 1 shown in FIG.

  Further, when the shell shell 20 is a highly rigid drawn shell type, it is manufactured by a drawn die, so that the inner diameter dimensional accuracy of the shell shell 20 and the cylindricity of the inner peripheral side shape are good compared to the wound shell type. Because of the high rigidity, when the stator 1 shown in FIG.

  The tightening stress due to the shell 20 is generated by the stator core assembly 11 from the stator yoke 14 that is in contact with the outer peripheral side of the stator core assembly 11 in which the stator laminated core assembly 10 and the tightening stress suppressing end plate 15 are integrated. The magnitude of the tightening stress varies depending on the inner diameter size of the shell 20, the cylindricity of the inner peripheral side shape, the rigidity of the material, and the like. Further, the distribution of the tightening stress differs depending on the outer peripheral side shape of the stator core assembly 11, the width of the stator yoke 14, and the width of the stator teeth 13.

  As described above, in the present embodiment, the tightening stress suppressing end plate 15 increases the rigidity of the stator core assembly 11 by setting the thickness t to three times or more the plate thickness of one stator laminated core. The tightening stress generated in the periphery of the stator yoke 14 and the stator slot 12 where the inner peripheral side of the shell 20 and the outer peripheral side of the stator core assembly 11 are in contact is suppressed, and the main magnetic circuit is fixed. The increase in iron loss due to the tightening stress around the child yoke 14 and the stator slot 12 is reduced, and the deterioration of the motor performance is suppressed even if the stator 1 shown in FIG. Can do.

  Further, although the motor stator of the present embodiment has been described with respect to a hermetic rotary compressor, the motor stator is also a compressor shell, particularly in hermetic scroll compressors and other hermetic compressors. The same effect can be obtained when receiving tightening stress.

(Embodiment 2)
FIG. 3 shows a stator core assembly 11 in which a tightening stress suppressing end plate 15 having a plate thickness t and a stator laminated core assembly 10 are integrated with a shell shell 20 according to a second embodiment of the present invention. 3 is a view showing a refrigerant passage 21 secured by a notch positioned in a radial direction of a shell shell 20 and a stator yoke 14 of a stator core assembly 11, which is fixed by swallowing or press fitting or the like. FIG.

  First, a clamping stress suppressing end plate 15 is provided on both end faces of the stator laminated core assembly 10, and the clamping stress suppressing end plate 15 has a thickness t that is at least three times the thickness of one stator laminated core, In addition, the stator core assembly 11 of the stator 1 shown in FIG. 1, which is configured in the same shape as the stator laminated core and in which the tightening stress suppressing end plate 15 and the stator laminated core assembly 10 are integrated, is a stator. A plurality of stator slots 12 arranged in a radial direction from the center of the core assembly 11, a stator tooth 13 formed between the stator slots 12, and a radial direction of the stator slot 12 The refrigerant passage 21 is arranged.

  As described above, in the present embodiment, the tightening stress suppressing end plate 15 increases the rigidity of the stator core assembly 11 by setting the thickness t to three times or more the plate thickness of one stator laminated core. The tightening stress generated around the stator teeth 13 where the inner peripheral side of the shell shell 20 and the outer peripheral side of the stator core assembly 11 are in contact with each other can be suppressed. It is possible to reduce an increase in iron loss due to the tightening stress of the stator teeth 13 portion, and to suppress a reduction in motor performance even if the stator 1 shown in FIG.

  In addition, although the motor stator of the present embodiment has been described with respect to a hermetic rotary compressor, in the hermetic scroll compressor and other hermetic compressors, the motor stator is tightened by the compressor shell. The same effect can be obtained when receiving.

(Embodiment 3)
FIG. 4 shows a stator core assembly 11 in which a tightening stress suppressing end plate 15 having a plate thickness t and a stator laminated core assembly 10 are integrated in a shell shell 20 according to a third embodiment of the present invention. FIG. 3 is a view showing a refrigerant passage 21 secured by a notch positioned in a radial direction of the trunk shell 20 and the stator yoke 14 of the stator core assembly 11, which is fixed by swallowing or press fitting.

  First, in FIG. 4, a clamping stress suppressing end plate 15 is provided on both end faces of the stator laminated core assembly 10, and the clamping stress suppressing end plate 15 is three times or more thicker than the thickness of one stator laminated core. t and having the same shape as the stator laminated core, and further, in the refrigerant passage secured by the cutout portion of the shell shell 20 and the stator laminated core assembly 10, the center of the stator core assembly 11 If the angle formed by the center of the width T of the stator teeth 13 adjacent to each other in the stator slot 12 is 2θ, the tightening stress suppressing end plate 15 has the stator holding force auxiliary protrusion 16 at the position of the center angle θ. The stator core assembly 11 of the stator 1 shown in FIG. 1 in which the tightening stress suppressing end plate 15 and the stator laminated core assembly 10 are integrated is arranged in the radial direction from the center of the stator core assembly 11. Multiple stator screws in any shape The lot 12 and the refrigerant passage 21 secured by the notch of the stator holding force auxiliary protrusion 16 positioned in the radial direction of the stator yoke 14 are configured.

  As described above, in the present embodiment, the tightening stress suppressing end plate 15 increases the rigidity of the stator core assembly 11 by setting the thickness t to three times or more the plate thickness of one stator laminated core. Therefore, the tightening stress generated around the stator teeth 13 where the inner peripheral side of the shell 20 contacts the outer peripheral side of the stator core assembly 11 can be suppressed. Further, in the refrigerant passage secured by the shell 20 and the stator laminated core assembly 10, an angle formed by the center of the stator core assembly 11 and the center of the width T of the stator teeth 13 adjacent to the stator slot 12. Is 2θ, the tightening stress suppressing end plate 15 is arranged with the stator holding force auxiliary projections 16 at the center angle θ, thereby improving the holding load of the stator 1 shown in FIG. Further, the increase in iron loss due to the tightening stress of the stator yoke 14 and the stator teeth 13 as the main magnetic circuit is reduced, and the stator 1 shown in FIG. In addition, it is possible to suppress the deterioration of the motor performance and improve the holding power of the stator 1.

  In addition, although the motor stator of the present embodiment has been described with respect to a hermetic rotary compressor, in the hermetic scroll compressor and other hermetic compressors, the motor stator is tightened by the compressor shell. The same effect can be obtained when receiving.

(Embodiment 4)
FIG. 5 shows a stator core assembly 11 in which a tightening stress suppressing end plate 15 having a plate thickness t and a stator laminated core assembly 10 are integrated with a shell shell 20 according to a fourth embodiment of the present invention. Or it is the figure which showed the refrigerant | coolant channel | path 21 secured by the notch | incision which was fixed by press injection etc. and was located in the radial direction of the stator teeth 13 of the trunk | shell 20 and the stator core assembly 11. FIG.

  First, in FIG. 5, a clamping stress suppressing end plate 15 is provided on both end faces of the stator laminated core assembly 10, and the clamping stress suppressing end plate 15 has a thickness t that is at least three times the plate thickness of one stator laminated core. And the outer peripheral dimension of the stator laminated core assembly 10 is larger than the outer peripheral dimension of the tightening stress suppressing end plate 15 in the range where the inner peripheral side of the shell 20 and the outer peripheral side of the tightening stress suppressing end plate 15 are in contact with each other. The stator core assembly 11 of the stator 1 shown in FIG. 1 in which the tightening stress suppressing end plate 15 and the stator laminated core assembly 10 are integrated by reducing the thickness by one d or less of the thickness of one stator laminated core. A plurality of stator slots 12 arranged in a radial direction from the center of the stator core assembly 11, a stator tooth 13 formed between the stator slots 12, and a radial direction of the stator teeth 13 By the refrigerant passage 21 arranged in Forms.

  As described above, in the present embodiment, the tightening stress suppressing end plate 15 has a thickness t that is at least three times as large as the thickness of one stator laminated core, and the tightening stress suppressing end of the inner shell 20 is tightened. In the range where the outer peripheral side of the end plate 15 contacts, the outer peripheral dimension of the stator laminated core assembly 10 is made smaller than the outer peripheral dimension of the tightening stress suppressing end plate 15 by the thickness d or less of one stator laminated core, The tightening stress of the shell shell 20 can be suppressed by the tightening stress suppressing end plate 15 and the influence of the tightening stress applied to the stator laminated core assembly 10 can be reduced. The stator 1 shown in FIG. It is possible to suppress the deterioration of the motor performance even if the shrinkage or press fitting is performed.

  In addition, although the motor stator of the present embodiment has been described with respect to a hermetic rotary compressor, in the hermetic scroll compressor and other hermetic compressors, the motor stator is tightened by the compressor shell. The same effect can be obtained when receiving.

(Embodiment 5)
FIG. 6 shows a tightening stress suppression having a slot having a thickness h larger than that of the stator laminated core / slot portion shape of the first to fourth embodiments of the present invention by a coil insulation insulator fitting portion thickness h and having a plate thickness t. It is the figure which integrated the end plate 15 and the stator lamination | stacking core assembly 10. FIG.

  First, the tightening stress suppressing end plates 15 provided on both end faces of the stator laminated core assembly 10 are arbitrarily arranged radially from the center of the tightening stress suppressing end plate 15 in order to fit the winding insulation insulator. The plurality of slot shapes are made larger than the slot shape of the stator laminated core by the fitting portion thickness h of the winding insulation insulator, and the fitting portion depth is set as the plate thickness t of the stress suppressing end plate 15, The tightening stress suppressing end plate 15 and the stator laminated core assembly 10 are integrated.

  As described above, in the present embodiment, the winding insulation insulators are attached to both end faces of the stator core assembly 11 shown in FIG. 2, and are loaded in the slots of the stator core assembly 11 shown in FIG. After the insulating paper is applied in the thickness direction, in the stator 1 having the winding 3 shown in FIG. 1, the tightening stress suppressing end plates 15 in which the winding insulating insulators are arranged on both end faces of the stator laminated core assembly 10. In order to make it fit, the arbitrary plurality of slot shapes arranged in the radial direction from the center of the tightening stress suppressing end plate 15 are only the fitting thickness h of the coil insulation insulator than the stator laminated core / slot shape. By enlarging and making the fitting portion depth the plate thickness t of the tightening stress suppressing end plate 15, fitting at both ends of the stator laminated core assembly 10 is avoided, and the stator laminated core assembly 10 Teeth and Yo It is possible to secure a magnetic circuit of the click portion, it is possible to suppress a decrease in motor performance.

  In addition, although the motor stator of the present embodiment has been described with respect to a hermetic rotary compressor, in the hermetic scroll compressor and other hermetic compressors, the motor stator is tightened by the compressor shell. The same effect can be obtained when receiving.

  As described above, the stator of the concentrated-winding motor for a hermetic compressor according to the present invention suppresses and relaxes the tightening stress generated by shrinking or press-fitting the stator into the compressor shell. It is possible to suppress a decrease in motor performance after assembly of the hermetic compressor, and it can be applied to a hermetic compressor aiming at higher performance and cost reduction.

Sectional drawing of the hermetic compressor which assembled | attached the electric motor in embodiment of this invention 1 is a configuration diagram in which a stator core assembly according to Embodiment 1 of the present invention is assembled to a shell shell. The block diagram which assembled the stator core assembly in Embodiment 2 of this invention to the trunk | shell shell The block diagram which assembled the stator core assembly in Embodiment 3 of this invention to the trunk | shell shell The block diagram which assembled the stator core assembly in Embodiment 4 of this invention to the trunk | shell shell Stator core assembly diagram according to Embodiment 5 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Winding 10 Stator laminated core assembly 11 Stator core assembly 12 Stator slot 13 Stator teeth 14 Stator yoke 15 Tightening stress suppression end plate 16 Stator holding force auxiliary projection 17 Tightening stress relaxation gap 20 Cylinder Shell 21 Refrigerant Passage 22 Compression Mechanism 23 Oil Pool 24 Discharge Pipe

Claims (5)

In a stator of a concentrated winding electric motor fixed to a shell shell of a hermetic compressor by shrinkage or press-fitting, a plurality of slots and adjacent slots in an arbitrary shape formed of laminated steel plates by punching with a mold A stator laminated core assembly having a refrigerant passage in the radial direction of the teeth portion formed therebetween, and clamping stress suppressing end plates on both end faces of the stator laminated core assembly, the clamping stress suppressing end plates being fixed The stator laminated core has a thickness three times or more than the thickness of the single stator laminated core, and has the same shape as the stator laminated core, and the stator laminated core assembly and the tightening stress suppressing end plate are integrated. A hermetic compressor in which a winding insulating insulator or insulating paper is applied to the inner peripheral side of the slot of the stator core assembly that has been made, and then the winding is provided. In a stator of a concentrated winding motor fixed to a shell shell of a hermetic compressor by shrinkage or press fitting, etc., a plurality of slots and arbitrary diameters of a plurality of slots formed in a laminated steel plate by punching with a mold A stator laminated core assembly having a refrigerant passage in a direction, and a clamping stress suppressing end plate on both end faces of the stator laminated core assembly, the clamping stress suppressing end plate having a thickness of one stator laminated core. In the slot of the stator core assembly having a thickness of three times or more and having the same shape as the stator laminated core and integrating the stator laminated core assembly and the tightening stress suppressing end plate A hermetic compressor in which winding insulation is provided after winding insulation insulator or insulating paper is provided on the peripheral side. In a stator of a concentrated winding motor formed by punching with a die and formed of laminated steel plates, a stator laminated core assembly having a plurality of slots and a refrigerant passage in a radial direction of the slot portion in an arbitrary shape, and the stator lamination 3. A clamping stress suppression end plate is provided on both end faces of the core assembly, and the clamping stress suppression end plate is provided with a stator holding force auxiliary projection at a center position of a refrigerant passage portion of the stator laminated core assembly. Hermetic compressor. In the outer peripheral side portion of the stator that is in contact with the inner peripheral side of the shell shell of the hermetic compressor, the outer peripheral dimension of the stator laminated core assembly is the tightening stress suppression integrated with both end faces of the stator laminated core assembly. By reducing the outer peripheral dimension of the end plate by a value equal to or less than the thickness of one stator laminated core, the inner shell is not in contact with the inner peripheral side of the shell, and the tightening stress is suppressed and alleviated by shrinkage or press fitting. The hermetic compressor according to any one of claims 1 to 3, wherein In a motor stator in which winding insulation insulators are attached to both end faces of a stator core assembly of a concentrated winding motor, and insulation paper is applied in a stacking direction in the slots of the stator core assembly, the winding insulation insulator is provided. In order to mate with the clamping stress suppressing end plates disposed on both end faces of the stator laminated core assembly, any of a plurality of slot portions arranged on the clamping stress suppressing end plate is a stator laminated core slot shape. 5. The hermetic compression according to claim 1, wherein the fitting insulation thickness of the winding insulation insulator is increased and the fitting insulation depth of the winding insulation insulator is the plate thickness of the tightening stress suppressing end plate. Machine.

Images