• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In order to attach an auxiliary crank to prevent auto-rotation of an orbiting scroll to a compressor case side bearing in a scroll compressor, a tool must access a compressor case from an engine side to attach the auxiliary crank to the compressor case side. compressor box side provided bearing. A plurality of notches or holes are arranged on a motor housing or compressor box. This allows for assembly of the auxiliary crankshaft to the auxiliary crank bearing even after the engine housing and compressor box are attached together. Hence, assembly can be performed in sequential steps.
    公开号:BE1022319B1
    申请号:E2014/0579
    申请日:2014-07-25
    公开日:2016-03-16
    发明作者:Shumpei Yamazaki；Yoshiyuki Kanemoto
    申请人:Hitachi Industrial Equipment Systems Co.,Ltd.；
    IPC主号:
    专利说明:

    Scroll type fluid machine
    BACKGROUND OF THE INVENTION
    Domain of the invention
    The present invention relates to a scroll type fluid machine.
    Description of the related art
    A conventional scroll compressor that integrates a compressor and a motor is known from the published Japanese patent application no. 2009257337 (patent document 1). The patent document 1 describes a structure comprising a compressor body with a fixed scroll and a web-rotating scroll, and a motor portion for rotatably driving the web-rotating scroll and wherein an output shaft of the motor is connected to a drive shaft of the orbiting scroll via a shaft coupling and a cooling fan.
    In the scroll compressor of the patent document 1, in which the compressor and the motor are integrated, the output shaft of the motor and the drive shaft are separated from the web-rotating scroll.
    Therefore, in a scroll compressor assembly process where the compressor and the motor are integrated, the compressor body and the motor part are assembled discretely and then attached to each other using the shaft coupling and the like. On the other hand, in a case where the motor output shaft is used directly as the drive shaft of the web rotating scroll, the method whereby the compressor body and the motor part are discretely assembled and then attached to each other, as described in the patent document 1, a disadvantageous increase in assembly costs because the assembly process is split up. Furthermore, the compressor body must be disassembled from the engine part for a thorough inspection of the compressor body or for replacing parts of the compressor body. This results in reduced maintainability.
    In the scroll compressor, the scroll rotating in a web is provided with an auxiliary crank for preventing its rotation. To attach the auxiliary crank to a bearing of a compressor cabinet, the auxiliary crank must be attached to a compressor cabinet by handling a tool from an engine mounting side. Therefore, attachment between the auxiliary crankshaft and a retaining bearing cannot be made after the engine portion is attached to the compressor body. This requires the following steps: separating the compressor body from the engine part; attaching the auxiliary crank, as a part of the compressor body, to the compressor housing; and then securing the compressor body and the motor part together. This results in the problems of increased assembly costs and reduced maintainability as mentioned above.
    In this regard, it is an object of the present invention to provide a scroll compressor with integrated compressor motor that considers assembly costs and maintainability.
    SUMMARY OF THE INVENTION
    According to the invention to achieve the aforementioned purpose, a plurality of notches or holes are arranged on a motor housing or the compressor housing.
    The invention allows the auxiliary crankshaft to be mounted on an auxiliary crank bearing even in a state where the motor housing and the compressor housing are attached to each other. Therefore, the motor part and the compressor part can be assembled in sequential steps. This results in the reduction of assembly costs.
    BRIEF DESCRIPTION OF THE DRAWINGS
    FIG. 1 is a schematic representation showing a general structure of a scroll compressor with integrated compressor motor according to a first embodiment of the invention;
    FIG. 2 is an exploded schematic representation of the first embodiment;
    FIG. 3 is a schematic representation showing an example of a motor housing according to a second embodiment of the invention arranged with holes;
    FIG. 4 is a schematic representation showing an example of a compressor cabinet of a third embodiment of the invention arranged with notches; and
    FIG. 5 is a schematic representation showing an example of a compressor cabinet of a fourth embodiment of the invention that is arranged with holes.
    DESCRIPTION OF THE PREFERRED EMBODIMENTS
    Preferred embodiments of the invention will be described below with reference to the accompanying drawings.
    First Embodiment
    FIG. 1 is a schematic representation showing a general structure of a scroll compressor with integrated compressor motor according to a first embodiment of the invention. In FIG. 1 is a motor indicated by 10; a motor housing for accommodating the motor is indicated by 10a; a compressor cabinet for accommodating a compressor is indicated by 1; a fixed scroll placed in the compressor cabinet and arranged with an upright evolving wrap, i.e. fin, envelope or wall, is indicated by 2; and a web-rotating scroll that is driven by a drive shaft 4 defined by a rotary axis of the motor, and which is positioned opposite the fixed scroll and is arranged with an upright evolvant wrap, ie fin, envelope or wall, that defines a plurality of compression chambers between itself and the wrap, ie fin, envelope or wall, of the fixed scroll is indicated by 3.
    The web-rotating scroll 3 is driven by the drive shaft 4 to perform a web-rotating motion through a web-rotating bearing to achieve compression by compressing the compression chambers 5 arranged between the web-rotating scroll and the fixed scroll when turning in orbit towards the center. In this case the web-rotating scroll 3 has an auxiliary crankshaft 6 for preventing its rotation. The auxiliary crankshaft 6 is retained by an auxiliary crank bearing 7 provided on the compressor case side which is mounted on the compressor case 1 and an auxiliary crank bearing 8 provided on the scroll-rotating side and mounted on the web-rotating scroll 3.
    The auxiliary crankshaft 6 and the auxiliary crank bearing 8 provided on the scroll side rotating in a web are fixed to the scroll 3 rotating in a web and are attached to the auxiliary crank bearing 7 provided on the compressor case side by means of a fastening element 9. the compressor crankcase side provided auxiliary crank bearing 7 is mounted on the compressor cabinet 1 from a side opposite the web rotating scroll 3.
    Notches 11 are placed on the motor housing 10a of the motor 10 and at locations between a stator 10b in the motor and the auxiliary crank bearing 7 provided on the compressor case side in order to attach the auxiliary crankshaft 6 to the auxiliary crank bearing 7 provided on the compressor case side while the motor 10 is attached to the compressor box 1.
    FIG. 2 is an exploded schematic representation of the associated parts of the first embodiment. Referring to FIG. 2, the motor housing 10a that accommodates the motor 10 and the compressor case 1 are attached to each other in a first step of an assembly process. Next, the web-rotating scroll 3 with the auxiliary crankshaft 6 attached to the web-driven scroll side 8 is attached to the compressor case 1. In this process, a tool is inserted through the notch 11 around the fastening element 9 to operate the auxiliary crankshaft 6 provided on the motor end side to the auxiliary crank bearing 7 provided on the compressor case side which is mounted on the compressor case 1. Subsequently, the fixed scroll 2 is attached to the compressor case 1 to assemble the complete scroll compressor with integrated compressor motor.
    This embodiment comprises three auxiliary crankshafts 6 and three notches 11 corresponding to the respective auxiliary crankshafts. The auxiliary crank bearings 7 provided on the compressor case side are arranged on the same circle at 120 ° intervals, so that the load is distributed evenly. Further, the notches 11 are also arranged on the same circle at 120 ° intervals in corresponding relation to the auxiliary crankshaft bearings 7. This allows the tool to be inserted through each of the notches 11 about each of the auxiliary crankshafts 6 on each corresponding to the compressor box to attach side bearing crank bearing 7.
    The notches 11 can be placed at any position to ensure that the tool can be inserted therethrough to access the auxiliary crank bearings 7 on the compressor case side. For example, two notches can be arranged for three auxiliary crankshaft bearings 7 on the compressor case side. In such a case, the drive shaft 4 and its associated components are centrally located with respect to one notch 11, and thus the other notch 11 may be opposed to the one notch relative to the drive shaft in order to surround the drive shaft. Namely, the notches are arranged such that the adjacent notches form an angle of less than 180 ° between them as seen from the drive shaft. It is desirable to determine a circumference width and an axial length of the notch considering the practicability of tool handling.
    The number of auxiliary crankshafts 6 must be greater than one, because the provision of a single auxiliary crankshaft can have the disadvantage that the load is concentrated at one point, whereby a deformation can be caused. For example, two auxiliary crankshafts or four auxiliary crankshafts can be provided. It is, however, desirable to provide three auxiliary crankshafts as the required minimum number for even load distribution. In the case of a plurality of auxiliary crankshafts, it is also necessary to provide a plurality of notches because the drive shaft and its associated components are positioned in the center, making it difficult to secure the plurality of auxiliary crankshafts through the one notch.
    As described above, the embodiment provides a sequential assembly process in which the end product is assembled by sequentially assembling the components during the construction sequence of the product. The assembly process can be integrated into one assembly line so that, for example, the components can be sequentially mounted on each other with a high operating efficiency. Therefore, the increase in assembly costs can be contained. If the compressor body is thoroughly inspected or if a part replacement is performed, the auxiliary crankshaft 6 can be disassembled through the notch 11 from the auxiliary crank bearing 7 on the compressor case side without disassembling the compressor body from the engine part. Hence, the embodiment has an effect on promoting maintenance.
    As a solution to the problem that attachment between the auxiliary crankshaft and its retaining bearing cannot be made after the engine part and the compressor body are attached to each other, consideration can be given to placing a mounting part between the auxiliary crankshaft and the retaining bearing on a outside with respect to the motor housing. In such a case, however, the outer diameter of the product is increased, thereby increasing the product dimension. In this regard, the embodiment can solve the aforementioned problem of increased product dimension by providing the notches 11.
    Second Embodiment
    A second embodiment is described with reference to
    FIG. 3.
    The second embodiment relates to the same scroll compressor with integrated compressor motor as that of the first embodiment, except that the aforementioned notches have been replaced by holes with a hole structure. As shown in FIG. 3, the motor housing 10a is arranged with holes 12.
    In a similar manner to the first embodiment, this embodiment allows the product assembly process to be carried out in sequential steps or integrated into one assembly line. The increase in assembly costs can thus be contained. If the compressor body is thoroughly inspected or a component replacement is performed, the auxiliary crankshaft 6 can be disassembled from the auxiliary crank bearing 7 on the compressor case side through the notch 11 without disassembling the compressor body from the engine part. Hence, the embodiment has an effect on promoting maintainability. Furthermore, the motor housing 10a is reinforced at the end, which is effective for suppressing deformation of the motor housing during operations.
    Instead of providing the notches 11 or holes 12, an independent element that is arranged with holes can be attached to the motor housing 10a so that it is thoroughly checked whether the part replacement can be performed through these holes.
    Third Embodiment
    A third embodiment is described with reference to
    FIG. 4.
    The third embodiment relates to the same scroll compressor with integrated compressor motor as that of the first embodiment except that the aforementioned notches 11 are arranged in the compressor cabinet 1. Referring to Figs. 4, the compressor case 1 is arranged with notches 11 which extend to a mounting part with the motor while the motor housing 10a is not arranged with the notches.
    In a similar manner to the first embodiment, this embodiment allows the product assembly process to be carried out in sequential steps or integrated into one assembly line. The increase in assembly costs can thus be contained. If the compressor body is thoroughly inspected or a component replacement is performed, the auxiliary crankshaft 6 can be disassembled from the auxiliary crank bearing 7 on the compressor case side through the notch 11 without disassembling the compressor body from the engine part. Hence, the embodiment has an effect on promoting maintainability. Furthermore, the structure of the motor housing 10a is simplified, which is effective for reducing production costs.
    Fourth Embodiment
    A fourth embodiment is described with reference to
    FIG. 5.
    The fourth embodiment relates to the same scroll compressor with integrated compressor motor as that of the third embodiment, except that the aforementioned notches have been replaced by holes with a hole structure. Referring to FIG. 5, the compressor case 1 is arranged with holes 12 extending to the mounting part with the motor while the motor housing 10a is not fitted with the notches or holes.
    In a similar manner to the third embodiment, this embodiment allows to perform the product assembly process in sequential steps or to integrate into one assembly line. The increase in assembly costs can thus be contained. If the compressor body is thoroughly checked or a component replacement is performed, the auxiliary crankshaft 6 can be disassembled from the auxiliary crank bearing 7 on the compressor case side through the notch 11 without disassembling the compressor body from the engine part. Hence, the embodiment has an effect on promoting maintainability. Furthermore, the motor housing 10a is reinforced at its end, which is effective for suppressing deformation of the motor during operation. As described above, the first to fourth embodiments have the structures in which the motor housing 10a or the compressor case 1 is arranged with the notches 11 or the holes 12. However, an alternative structure can be made so that the notches 11 or the holes 12 are covered . This structure is adapted for internal protection of the compressor and the motor 10 and for limiting noise from the compressor and the motor 10.
    According to the first to fourth embodiments, the motor housing 10a or the compressor case 1 is arranged with the notches 11 or the holes 12. Alternatively, an independent element arranged with holes can be placed between the motor housing 10a and the compressor case 1. Incidentally, the part between the motor housing 10a and the compressor box 1 can be arranged with the notches 11 or the holes 12 through which the thorough inspection of the compressor body or the part replacement is carried out.
    Although the embodiments of the invention have been described, it is to be noted that the invention is not limited to the above embodiments, but includes various modifications. Further, a portion of the structure of one embodiment may be replaced with a structure of another embodiment. In addition, a structure of the other embodiment can be added to a structure of the one embodiment. Part of the structure of each embodiment also allows the addition of another structure, omission, or replacement.
    权利要求:
    Claims (9)
    [1]
    CONCLUSIONS
    A scroll type fluid machine comprising: a motor housing which accommodates a motor for driving a compressor; a compressor cabinet which accommodates the compressor; a fixed scroll placed in the compressor cabinet; a web-rotating scroll that is driven by a motor drive shaft and defines a compression chamber at opposite positions to the fixed scroll; and a plurality of auxiliary crankshafts for preventing the rotation of the orbiting scroll, the plurality of auxiliary crankshafts being retained by a plurality of first auxiliary crankshaft bearings mounted on the compressor case and a plurality of second auxiliary crank bearings respectively be mounted on the orbiting scroll, a plurality of notches or hole structures being arranged on the motor housing or the compressor housing at locations between the first aid crank bearings and a stator placed in the motor.
    [2]
    The scroll type fluid machine according to claim 1, wherein the number of notches or hole structures is equal to the number of auxiliary crankshafts.
    [3]
    The scroll type fluid machine according to claim 1, wherein an angle between adjacent notches or hole structures as viewed from the drive shaft is less than 180 °.
    [4]
    The scroll type fluid machine according to claim 2, wherein the number of auxiliary crankshafts and the number of notches or hole structures are three.
    [5]
    A scroll type fluid machine comprising: a motor housing which accommodates a motor for driving a compressor; a compressor cabinet which accommodates the compressor; a fixed scroll placed in the compressor cabinet; a web-rotating scroll that is driven by a drive shaft of the motor and defines a compression chamber at opposite positions to the fixed scroll; and a plurality of auxiliary crankshafts for preventing the rotation of the orbiting scroll, the plurality of auxiliary crankshafts being retained by a plurality of first auxiliary crankshaft bearings mounted to the compressor case and a plurality of second auxiliary crank bearings respectively be mounted on the orbiting scroll, the motor having a stator, and wherein a plurality of notches or hole structures are arranged on the motor housing at locations between the stator and the first-aid crank bearings.
    [6]
    The scroll type fluid machine according to claim 5, wherein the number of notches or hole structures is equal to the number of auxiliary crankshafts.
    [7]
    The scroll type fluid machine according to claim 5, wherein a portion of the notch or hole structure is on the compressor housing.
    [8]
    The scroll type fluid machine according to claim 5, wherein an angle between adjacent notches or hole structures as viewed from the drive shaft is less than 180 °.
    [9]
    The scroll type fluid machine according to claim 6, wherein the number of auxiliary crankshafts is three, while the number of notches or hole structures is also three.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20050169788A1|2003-12-26|2005-08-04|Yuji Komai|Scroll type fluid machinery|
    JP2009257337A|2009-08-05|2009-11-05|Hitachi Ltd|Scroll type fluid machine|
    US20130251543A1|2012-03-23|2013-09-26|Bitzer Kuehlmaschinenbau Gmbh|Compressor with Oil Return Passage Formed Between Motor and Shell|
    JPH06213174A|1992-11-30|1994-08-02|Kobe Steel Ltd|Scroll compressor|
    JP4263323B2|1999-10-26|2009-05-13|アネスト岩田株式会社|Scroll fluid machinery|
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    JP2004144077A|2002-09-23|2004-05-20|Tecumseh Products Co|Compressor with alignment bushing and its assembling method|
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    JP4629546B2|2005-09-30|2011-02-09|アネスト岩田株式会社|Scroll fluid machinery|
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    JP5457943B2|2010-06-02|2014-04-02|株式会社日立産機システム|Scroll type fluid machine|
    JP5923794B2|2011-11-24|2016-05-25|日本電産セイミツ株式会社|Vibration motor|WO2016038694A1|2014-09-10|2016-03-17|株式会社日立産機システム|Scroll fluid machine|
    WO2017037778A1|2015-08-28|2017-03-09|株式会社日立産機システム|Scroll-type fluid machine and maintenance method for same|
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    CN107035688A|2017-04-24|2017-08-11|南昌大学|A kind of electromechanical integration oil-free turbo-compressor|
    法律状态:
    优先权:
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    JP2013202987A|JP6154711B2|2013-09-30|2013-09-30|Scroll type fluid machine|
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