• 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:
    A fixed volute member and a volute fluidic machine using the fixed volute member, which improve problematic situations by controlling the capacity of a portion of the compression space that includes a discharge port in a central portion of a end plate of the fixed volute element, are offered. A scroll fluidic machine includes a fixed scroll member attached to a housing, a rotary scroll member configured to mesh with the fixed scroll member to rotate around the fixed scroll member to thereby define a space of movable compression, and a discharge port provided in an end plate of the fixed volute member in a position corresponding to a center of the fixed scroll member in the compression space, a recess portion being provided in the vicinity of the discharge port in a central portion of the fixed volute member to increase a capacity of the compression space which corresponds to the center of the fixed volute member.
    公开号:BE1023306B1
    申请号:E2014/0214
    申请日:2014-03-27
    公开日:2017-01-30
    发明作者:Tamotsu Fujioka；Junichi Asami
    申请人:Anest Iwata Corporation；
    IPC主号:
    专利说明:

    Fixed scroll element and volute fluidic machine
    Background of the invention
    The present invention relates to a fixed scroll element and a volute fluidic machine using the fixed scroll element. The present invention also relates to a fixed volute element and a volute fluidic machine using the fixed scroll element, which improves a problematic situation in which predetermined compressibility is not obtained or excessive compression is caused due to environment where the volute fluidic machine is used.
    It is known that in a fixed scroll member and a volute fluidic machine using the fixed scroll member, a nominal compression ratio is constant, which is determined by a ratio of a compression space capacity when the suction is closed with respect to a compressive space capacity when the compression ends. Therefore, an optimum nominal compression ratio is set for an operating condition where a specific suction pressure and a discharge pressure are used, to enable very efficient operation.
    In an operating condition where a difference between a high pressure and a low pressure becomes low or an operating condition where a high Hz operation is performed by an inverter, however, a phenomenon called excessive compression is caused, causing a problem, that is, the compression efficiency is reduced by an increase in compressive power.
    Then, to address the use of a changeable filler such as revolution speed, pressure and the like which change depending on the operating conditions, for example, a countermeasure has been taken in which the height of a lathe (A spiral element) or the spiral length of a volute is changed (for example, refer to Japanese Publication Laid-open No. HQ5-172067 (Patent Document 1)).
    However, changing the spiral height or length of a revolution of a rotating scroll causes an unbalanced movement of the rotary scroll member relative to the movement thereof prior to the change, causing a vibration or noise. Although it is possible to change the amount of balancing individually, productivity deteriorates. On the other hand, in Japanese Laid-open Publication No. 2008-286095 (Patent Document 2), in addition to a discharge port in a central portion of an end plate of a volute fixed, an expansion orifice is provided, and the expansion orifice is composed of a group of expansion orifices which are holes provided along the spiral direction of a spiral tower in order to guarantee a surface area of expansion hole required. Then, the group of expansion orifices is collected in a single expansion orifice, and a common expansion valve is provided for it.
    Related Technical Document Patent Document
    Patent Document 1 Japanese Publication Laid-open No. H05-172067
    Patent Document 2 Japanese Publication Laid-Open No. 2008-286095 Summary of the Invention
    In patent document 2 above, however, the expansion valve must be placed in a position that corresponds to the position where the expansion orifice is provided, which increases the number of parts involved accordingly. In addition, the position where the expansion valve is to be placed is limited by the position of the expansion orifice, and therefore a problem is caused that the degree of freedom in the arrangement of the expansion valve is eliminated. .
    The present invention has been proposed to improve the problematic situations described above, and an object thereof is to provide a fixed scroll element and a volute fluidic machine using the fixed scroll element, which improves problem situations in which predetermined compressibility is not achieved or excessive compression is caused due to an environment where the volute fluidic machine is used.
    In order to solve the problem, a fixed scroll member and a volute fluidic machine using the fixed scroll member are provided, which are improved by controlling the capacity of a compression space portion, which includes an orifice in a central portion of an end plate of the fixed scroll member.
    A fixed volute element according to one aspect of the present invention comprises an end plate, a fixed spiral tower which is provided on the end plate, and a discharge port which is provided in an area which is surrounded by the fixed lathe and which is in a central part of the end plate. The fixed scroll member includes a recess portion that is provided in the vicinity of the discharge port to increase a capacity of a compression space that corresponds to a center of the fixed scroll member.
    A scroll fluid machine according to one aspect of the present invention comprises a fixed scroll member which is secured to a housing, a rotary scroll member which meshes with the fixed scroll member to rotate around the element. fixed scroll to thereby define a movable compression space, and a discharge port which is provided in an end plate of the fixed scroll member in a position corresponding to a center of the fixed scroll member in a the compression space. The fixed scroll member includes a recess portion which is provided in the vicinity of the discharge port in a central portion of the fixed scroll member to increase a capacity of the compression space which corresponds to the center of the fixed scroll element.
    Brief description of the drawings
    Fig. 1 is a sectional view showing an assembly of a volute fluidic machine which is an embodiment according to the present invention.
    FIG. 2 is a sectional view of a fixed scroll element of the volute fluidic machine shown in FIG.
    FIG. 3 is a plan view of the fixed scroll element shown in FIG.
    FIG. 4 is a sectional view of the fixed scroll element taken along the line IV-IV in FIG.
    Detailed Description of the Preferred Embodiments
    Hereinafter, an embodiment of a fixed scroll member and a scroll fluid machine using the fixed scroll member according to the invention will be described in detail in accordance with the accompanying drawings.
    Figure 1 is a sectional view of a fixed scroll member and a volute fluidic machine 1 using the fixed scroll member according to one embodiment of the present invention.
    This fixed scroll element and the volute fluidic machine 1 which uses it are a cantilevered fixed scroll element in which an eccentric shaft portion of a crankshaft, which drives a rotary scroll element, supports the cantilever rotary scroll member via a bearing member; and a scroll fluid machine which utilizes the cantilevered fixed volute member, respectively.
    To briefly describe the fixed volute element and the volumetric fluid machine 1 that uses it, the volute fluid machine 1 using the fixed volute element has a first housing 2 which is open on a left end side in an X-axis direction, as seen in FIG. 1, and a second housing 3 which is contiguous with the first housing 2 in the X-axis direction and which is larger in one dimension in an axis direction Y that the first housing 2. The volute fluidic machine 1 also comprises a third housing 4 in the first housing 2, and this third housing 4 is arranged concentrically with the first housing 2 relative to a central line XI which extends through the center of the opening of the first housing on the left end side in the X-axis direction.
    A fan 5 is disposed inside the third housing 4, and this fan 5 rotates about the central line XI which serves as the center of rotation of the fan 5.
    Further, a rotary scroll element 6 and a fixed scroll member 7 are provided in the second housing 3. The fixed scroll member 7 is attached to the second housing 3 and the third housing 4. In addition, although this is described below, the fixed scroll member 7 is attached to the second housing 3 via a bearing attachment member 13 to a crank pin crank bearing which connects the rotary scroll member 6 and the element. fixed volute 7 to each other.
    In addition, a plurality of inlet ports 3in (to be described below) from which cooling air is admitted are provided in the second housing 3, and a cooling passage is provided in the first housing 2 and the third housing 4. The rotary scroll element 6 has an end plate 6a and a spiral rotary kiln 6r which is provided on the end plate 6a, and the fixed scroll member "7 has a end plate 7a and a fixed spiral lathe 7r which is provided on the end plate 7a.
    The rotating turn 6r of the rotary scroll element 6 is provided on the end plate 6a to project therefrom, and the fixed turn 7r of the fixed scroll member 7 is provided on the plate end 7a to form a spiral groove which has a depth equal to a height of the rotary lathe 6r.
    Thus, constructed in the manner described above, the rotary scroll member 6 and the fixed scroll member 7 are provided so that respective sliding surfaces of the end plates 6a, 7a are directed in the axis direction. Y in a state such that rotary turn 6r and fixed turn 7r mesh with each other, with rotary turn 6r on end plate 6a of rotary scroll member 6 engaged with the spiral groove (fixed tower 7r) formed on the end plate 7a of the fixed scroll member 7. Then a crescent shaped compression space S is formed as a result of the rotary turn 6r and the fixed tower 7r meshing with each other. Tip seals 6rs, 7rs are fitted tightly to distal ends of the rotating turn 6r and the fixed turn 7r, respectively, which are brought into contact with the opposite end plates 7a, 6a. An introduction port (omitted) is provided which communicates with the compression space S to introduce a compressible fluid into the compression spaces S from an external location, and a discharge port. 8 is provided which communicates with a central compression space S for a compressed fluid of a predetermined pressure to be discharged from the central discharge port 8. The rotary scroll element 6 which is configured as described herein above is connected to an eccentric shaft 9a at a distal end of a drive shaft 9, which is inserted through the third housing 4 and the fan 5 along the direction of the center line XI via A bearing element 10. An axis X2 of the eccentric shaft 9a is eccentric with respect to the center line XI along a distance L. The drive shaft 9 is connected to an output shaft of a motor. training, q ui is not represented.
    Further, in the rotary scroll member 6 and the fixed scroll member 7, crank crank bearings 11 are provided at a plurality of locations (here, three locations) which are located near the outer circumferences of the plates. end 6a, 7a which slide on one another.
    The crankpin bearing 11 comprises a first shaft 11a which is rotatably supported by the end plate 7a of the fixed scroll member 7 via a roller bearing 12a and a second shaft 11b which is rotatably supported by the end plate 6a of the rotary scroll element 6 by means of a roller bearing 12b and whose axis is eccentric according to the distance L with respect to an axis of the first shaft lia. In addition, the crank crank bearing 11 is attached to the second housing 3 via the bearing fastener 13.
    In addition, cooling fins f1 are provided on a rear side of the end plate 7a of the fixed scroll member 7. Cooling fins f6 are also provided on the rotary scroll member 6.
    In short, the volute fluidic machine 1 is configured as described above. Now, the fixed scroll member 7 will be described in detail with reference to FIGS. 2 and 3. The fixed scroll member 7 is formed, for example, of an aluminum material, and the end plate 7a substantially has a circular disc shape. The stationary tower 7r is formed on the side of the end plate 7a where the sliding surface is formed to slide on the rotary scroll element 6 and to form the spiral groove, as described above. .
    In this case, a winding start or spiral start end of the fixed turn 7r is located in a central portion of the end plate 7a, while a winding or spiral termination end is located on an outer circumferential side of the end plate 7a.
    As shown in FIG. 2, compression spaces SO to S4 are formed radially in a row on the end plate 7a, as seen in section, by the spiral fixed lathe 7r.
    Here, a central compression space SO constitutes a pressure space of the highest setpoint pressure. The discharge port 8 gives the compression space SO.
    A nominal compression ratio of the compression space S0 is determined by a ratio of a capacity of the compression space when a suction is closed with respect to a capacity of the compression space when the compression ends. However, as excessive compression is caused in, for example, an operating condition where a difference between a high pressure and a low pressure becomes low or an operating condition where high Hz operation is performed by an inverter, to avoid In the event of such excessive compression, the capacity of the central compression space SO where the pressure becomes the highest must be increased to eliminate the state of excessive compression.
    To achieve this, a recess portion 20 is formed on the end plate 7a in a position corresponding to the central compression space S0 by etching the end plate 7a to a predetermined depth with a predetermined tool. The recess portion 20 is formed into a sectoral groove to control the maximum pressure drop rate. Namely, in the case where the engraving depth of the recess portion 20 has a constant value, the increase in capacity can be controlled by controlling a length of the recess portion 20 which extends along the center of the groove sector. In this embodiment, the recess portion 20 is provided such that the recess portion 20 communicates with the discharge port 8, as described in FIGS. 2-4.
    Thus, as the volute fluid machine 1 according to the present invention is configured as described above, in the fixed scroll element 7, the mobile crescent-shaped compression space S is formed while the rotary lathe 6r and the fixed tower 7r mesh with each other as a result of a sliding operation of the fixed scroll element 7 with the rotary scroll element 6.
    The capacity of the crescent-shaped compression space S becomes smaller as the crescent-shaped compression space S moves from the compression space S4 to the central compression space S0, whereby the compressible fluid is compressed to a set pressure and can then be discharged from the discharge port 8 as a compressed fluid of the set pressure.
    Although the compressed fluid of the set pressure is excessively compressed by an environment where the volute fluidic machine 1 is used or by various unavoidable conditions or situations, it is possible to eliminate the occurrence of excessive compression by making sure that the compressed fluid is discharged with the set pressure of the latter reduced in advance by a predetermined percentage at most.
    In this way, the capacity of the recess portion 20 which is etched into the end plate 7a in the position corresponding to the central compression space S0 with the predetermined tool can be controlled, and therefore, an advantage is proposed because the volute fluidic machine 1 can be controlled to be used freely within its capacity.
    Therefore, not only can the state of excessive compression be eliminated, but also a compressed fluid of a required discharge pressure can be freely obtained in advance, whereby it is possible to propose the volute fluid machine 1 which can address various conditions of application.
    Thus, the volute fluid machine 1 according to the present invention has been described with reference to the embodiment thereof. However, the present invention is, of course, not limited to the embodiment described above.
    For example, in the embodiment, although the recess portion 20 which is formed in the end plate 7a in the position corresponding to the central compression space S0 has a sectoral shape, the present invention is not limited to this.
    Further, the recess portion 20 need not necessarily communicate with the discharge port 8. Briefly, the recess portion 20 may have any shape as long as it can increase the capacity of the central compression space S0 .
    According to the embodiment described above, as the capacity of the compression space which is in the zone in the central part of the end plate where the pressure of a compressed fluid is increased to a level the higher is increased by the recess portion provided in the vicinity of the discharge port, it is possible to reduce an excessive compression state accordingly.
    According to one aspect of the present invention, the recess portion communicates with the discharge port.
    By adopting this configuration, the compressible compressible fluid can be discharged from the discharge port as a compressible fluid of suitable compressibility as a result of a trouble-free reduction in compressibility that is greater than required.
    According to one aspect of the present invention, the recess portion is configured so that a capacity of the recess portion can be controlled.
    By adopting this configuration, the volute fluidic machine can be used while being freely controlled within a capacity thereof. Therefore, not only can an excessive compression state be eliminated, but also a compressed fluid of a pre-requisite discharge pressure can be freely obtained, whereby the volute fluid machine can address various application conditions.
    In one aspect of the present invention, the recess portion extends along the spiral tower of the fixed scroll member. In the configuration, the capacity increase (recess capacity) can be controlled by controlling a length of the recess along the spiral tower.
    According to one aspect of the present invention, the recess portion is formed into a sectoral groove. In the configuration, the capacity increase (recess capacity) can be controlled by controlling a length (arc length) of the recess portion extending along the center of the sectoral groove.
    Advantage of the invention
    According to the embodiment described above, it is possible to propose the fixed scroll element and the volute fluidic machine using the fixed scroll element, which can improve a problem situation in which a predetermined compressibility is not possible. obtained or excessive compression is caused due to an environment where the volute fluidic machine is used, controlling the capacity of the compression space portion which includes the discharge port in the center portion of the plate. end of the fixed scroll element. Therefore, the expansion port and expansion valve for the expansion port that are required in the conventional scroll fluid machine may be omitted.
    Industrial Applicability The invention can be applied to fluidic scroll machines of various types.
    Although only some illustrative embodiments of the present invention have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the illustrative embodiments without departing materially from the teachings and new advantages. of the present invention. Therefore, any such modifications are intended to be included within the scope of the present invention.
    The present application claims the priority of Japanese Patent Application No. 2013-072385 filed March 29, 2013.
    Description of numbers and reference characters 1 volute fluidic machine; 2 first housing; 3 second dwelling; 3in entry port; 4 third dwelling; 5 fan; 6 rotary scroll element; 6r rotating turn; 7 fixed scroll element; 7r fixed tower; 6rs, 7rs bit seal; 8 discharge port; 9 drive shaft; 9a eccentric shaft; Bearing element; 11 crank pin crank bearings; the first tree; 11b second tree; 12a, 12b roller bearing; 13 bearing fasteners; 20 recess part; S0 to S4: compression space; f6, f7 fin.
    权利要求:
    Claims (10)
    [1]
    CLAIMS. .1. .A fixed scroll element (7), characterized in that it comprises: an end plate (7a); a fixed spiral lathe (7r) provided on the end plate, (7a); and a discharge port (8) provided in an area which is surrounded by the fixed tower (7r) and which is in a central portion of the end plate (7a), wherein a recess portion (20) is provided in the vicinity of the discharge port (8) for increasing a capacity of a compression space (So) which corresponds to a center of the fixed scroll member (7).
    [2]
    2. - Fixed scroll element (7) according to claim 1, wherein the recess portion (20) communicates with the discharge port (8).
    [3]
    The fixed volute element (7) according to claim 1 or 2, wherein the recess portion (20) is configured such that an etch depth of the recess portion (20) has a constant value and a the capacity of the recess portion (20) can be controlled by controlling a length of the recess portion (20).
    [4]
    The fixed scroll member (7) according to claim 1 or 2, wherein the recess portion (20) extends along the fixed spiral tower (74) of the fixed scroll member (7).
    [5]
    5. - Fixed scroll element (7) according to claim 1 or 2, wherein the recess portion (20) is formed in a sectoral groove.
    [6]
    6. - volute fluidic machine (1), characterized in that it comprises: a fixed volute element (7) fixed to a housing (3, 4), a rotary scroll element (6) configured to mesh with the fixed scroll member (7) to rotate about the fixed scroll member (7) to thereby define a movable compression space (S), and a discharge port (8) provided in a plate end (7a) of the fixed scroll member (7) in a position corresponding to a center of the fixed scroll member (7) in the compression space (S), wherein a recess portion (20) ) is provided in the vicinity of the discharge port (8) in a central portion of the fixed scroll member (7) to increase a capacity of the compression space (So) which corresponds to the center of the pressure plate end (7a) of the fixed scroll element (7).
    [7]
    7. - volute fluid machine (1) according to claim 6, wherein the recess portion (20) communicates with the discharge port (8).
    [8]
    The volute fluid machine (1) according to claim 6 or 7, wherein the recess portion (20) is configured such that an etch depth of the recess portion (20) has a constant value and a a capacity of the recess portion (20) can be controlled by controlling a length of the recess portion (20).
    [9]
    9, - volute fluid machine (1) according to claim 6 or 7, wherein the recess portion (20) extends along a fixed spiral tower (7r) of the fixed scroll element (7). ).
    [10]
    Fluidic volute machine according to claim 6 or 7, wherein the recess portion (20) is formed into a groove.
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    同族专利:
    公开号 | 公开日
    KR20140118855A|2014-10-08|
    JP2014196692A|2014-10-16|
    CN104074755A|2014-10-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2325705A|1995-03-22|1998-12-02|Mitsubishi Electric Corp|Scroll compressor|
    US6113372A|1998-08-18|2000-09-05|Carrier Corporation|Scroll compressor with discharge chamber groove|
    JP2003328965A|2002-05-15|2003-11-19|Matsushita Electric Ind Co Ltd|Scroll compressor|
    EP2466068A1|2009-08-12|2012-06-20|Sanden Corporation|Scroll fluid machine|
    JP2979777B2|1991-10-01|1999-11-15|ダイキン工業株式会社|Scroll type fluid machine|
    JP3774964B2|1996-12-10|2006-05-17|株式会社日立製作所|Scroll compressor|
    JP2000161261A|1998-11-20|2000-06-13|Fujitsu General Ltd|Scroll type compressor|
    JP2005273453A|2004-03-22|2005-10-06|Aisin Seiki Co Ltd|Scroll compressor|
    JP4848202B2|2006-04-14|2011-12-28|三菱重工業株式会社|Scroll compressor|CN104595184A|2014-12-06|2015-05-06|无锡高卓流体设备有限公司|Scroll fluid machine|
    JP6485500B2|2017-07-07|2019-03-20|ダイキン工業株式会社|Scroll compressor|
    FR3070446B1|2017-08-29|2020-02-07|Danfoss Commercial Compressors|A SPIRAL COMPRESSOR HAVING A CENTRAL MAIN OUTLET AND AN AUXILIARY OUTLET|
    TWI680234B|2018-10-03|2019-12-21|財團法人工業技術研究院|Scroll structure for compressor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP723852013|2013-03-29|
    JP2013072385A|JP2014196692A|2013-03-29|2013-03-29|Fixed scroll body and scroll fluid machine using the same|
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