CN1191958A - 供螺杆压缩机用的组合阀 - Google Patents

供螺杆压缩机用的组合阀 Download PDF

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CN1191958A
CN1191958A CN98103949A CN98103949A CN1191958A CN 1191958 A CN1191958 A CN 1191958A CN 98103949 A CN98103949 A CN 98103949A CN 98103949 A CN98103949 A CN 98103949A CN 1191958 A CN1191958 A CN 1191958A
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valve
chamber
exhaust chamber
valve body
hole
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CN1114807C (zh
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彼得·T·舒特
斯坦利·R·格兰特
迈克尔·G·菲尔德
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Carrier Corp
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Carrier Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/70—Safety, emergency conditions or requirements
    • F04C2270/72—Safety, emergency conditions or requirements preventing reverse rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7771—Bi-directional flow valves
    • Y10T137/7772—One head and seat carried by head of another
    • Y10T137/7774—Supporting valve spring carried by supporting valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7771—Bi-directional flow valves
    • Y10T137/7772—One head and seat carried by head of another
    • Y10T137/7777—Both valves spring biased

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Safety Valves (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressor (AREA)

Abstract

将一个正常情况下关闭的阀结构设置在一压缩机的吸气侧和排气侧之间的流道上。当在正常吸气侧内出现将发生反转的迹象的较高压力时,该阀结构在一个小的压力差作用下打开。此外,当排放压力变得过大时,有一释放阀结构打开。

Description

供螺杆压缩机用的组合阀
旋转式压缩机可能因停机时发生的通过压缩机的压力平衡以及因电源相位反相或接线错误而反向旋转。如果反向旋转是由于压力平衡造成的，只要有压缩气体形式的动力，压缩机就要反向旋转，此时，其起一个膨胀器的作用。通常，能用作动力的压缩气体的量是泵结构内的和在泵结构与在排放管路上的单向阀之间的容积，单向阀限制着反转动力的量。在电源相位反向或接线错误的情况下，压缩机起抽吸泵的作用，排放管路的单向阀阻止气体供到反向运转装置的吸入处。该装置将保持抽吸较深度的真空，正常的润滑被破坏，往往造成机构故障而停机。在正常运转中，集留的压缩气体被输至排放管路，但其压力必须建立到排放管路的压力，以便能进行排放。如果排放管路里有阻塞，集留的气体就将被压缩到过高的压力，从而由于泵结构内的超常压力而对装置造成损坏。
在压缩机的吸入侧和排放侧之间设置一组合阀。通常，两个阀都是靠偏压关闭的。在处于反向运转状态下正常排放侧的压力比正常吸入侧的压力低时，受反向运转触发的阀在一相对较小的压力差作用下打开。而释放阀仅在排放侧对吸入侧的压力差超过预定的差值时才打开。
本发明的一个目的是允许螺杆压缩机承受可接受的反向运转时间。
本发明的另一个目的是降低反向推力载荷，并由此减小在反向运转过程中螺杆压缩机转子和壳体之间的接触力。
本发明的再一个目的是防止螺杆压缩机出现卡住现象和/或延长因反转发生故障之前的时间。这些目的和其它的目的将通过下面的描述变得清楚，并通过本发明得以实现。
本质上来说，常闭阀结构是设置在压缩机的吸入侧和排放侧之间的一流体路径上。当正常的吸入侧出现较高的压力时(这是将发生反转的迹象)，阀结构在一小的压力差下打开。此外，当排放侧相对于吸入侧的压力差超过一预定的差值时，释放阀结构打开。
图1是使用本发明的螺杆压缩机的一部分的局部剖视图；
图2是显示本发明的阀结构在其正常关闭位置时的剖视图；
图3是阀结构的剖视图，显示了阀的反向旋转触发打开；
图4是阀结构的剖视图，显示了释放阀打开；以及
图5是沿着图2中的5-5线的剖视图。
在图1中，标号10一般表示具有内转子20和外转子(未画出)的双转子螺杆压缩机。这些转子位于转子壳体12里。出口箱14固定在转子壳体12的排放侧，而轴承箱16固定在出口箱14的另一侧。转子壳体12、出口箱14和轴承箱16通过螺栓18适当地固定在一起。压缩机10具有吸气室S和排气室D。吸气室S和排气室D之间的连通通常是通过由转子和相关结构限定的泵结构实现的。这方面的结构是通常已知的。本发明在转子壳体里增加了一个连接吸气室S和排气室D的螺纹孔12-1。阀组件40固定安装在孔12-1里，在正常情况下阻止抽气室S和排气室D之间通过孔12-1的流通。
参看图2，所示的阀组件40处于正常关闭位置。六角头零件42以螺纹旋接在转子壳体12的孔12-1里，并与O型圈44相配合实现密封。零件42具有孔42-1、孔42-2、环形凹槽42-3和一凸缘部分42-4。阀体是由零件50、52和54组成的。零件50具有螺纹孔50-1，许多沿圆周间隔设置的缝槽50-2，以及环形凸缘50-3。零件54具有螺纹孔段54-1、光滑孔段54-2、阀座54-3、阀孔54-5、凸缘部分54-6、以及在凸缘部分54-6上的环槽54-7。O型圈60位于凹槽54-7里，其在正常情况下紧抵着凸缘42-4而起密封作用。由于凸缘50-3和凸缘54-6均不能穿过孔42-2，因此组装时，它们必须位于零件42的相对两侧。零件50和54的连接是通过环形连接件52实现的，连接件52具有一可与螺纹孔50-1和54-1旋接的螺纹部分52-1、以及一中心孔52-2。
可通过各种顺序将零件50、52和54组装在一起。阀盘56和弹簧57必须在零件52旋接在孔54-1里之前安装在孔54-1/54-2里。而弹簧58必须在零件52旋接在螺纹孔50-1和54-1里之前安装在孔42-1/环形凹槽42-3里。零件52提供四个功能：(1)用来连接零件50和54；(2)作为弹簧57的弹簧座；(3)调整弹簧57的弹力；以及(4)当阀盘56微微抬起时形成释放流道的一部分。
在图2中，阀组件40、即阀的所有零件都处于关闭的位置，零件54延伸进入排气室D，而阀盘56在孔54-5的范围内承受排气室的压力。阀盘56的另一侧承受吸气室压力和硬弹簧57的弹力，该弹簧对阀盘56施加一等于几百psi(磅/英寸2)的压力的弹力，而使它保持关闭状态。软弹簧58具有相当于1到6psi的弹力，并位于凸缘50-3和环形凹槽42-3之间。弹簧58与作用在零件54和阀盘56上的排放压力一起趋向于使由零件50、52和54组成的整个阀体保持在原位不动，并受到作用在零件50和54及阀盘56上的净吸入压力的反抗。
当象反向运转过程中那样吸气室里出现一个高于排气室的压力时，作用在由零件50、52和54组成的阀体和阀盘56上的压力差将使凸缘54-6在几个psi的标称压力差下离开凸缘42-4。图3描述了阀组件40响应反向运转而打开时的位置。从压力较高的抽气室到压力较低的排放室的流道依次是孔42-1、孔50-1和缝槽50-2。
当排放室里的压力超过要求的排放压力时，作用在阀盘56上的压力将使阀盘56反抗弹簧57较强的弹力和作用在阀盘56另一侧的吸入压力而微微抬起。图4描述了阀盘56响应过高的排放压力而微微抬起的情况。当阀盘56微微抬起，在排气室和吸气室之间就建立起了流道，该流道依次包括阀孔54-5、孔54-2、在阀盘56上的凹槽56-1、孔54-1、孔52-2、孔50-1和缝槽50-2。

Claims (4)

1.一种组合阀，其可用在具有一吸气室(S)和一排气室(D)以及泵结构(20)的压缩机里，所述泵结构在吸入压力下从上述吸气室抽吸气体并以排放压力向所述排气室输送气体，该组合阀包括：
一通道(12-1)，它旁通于所述泵结构，并连接所述吸气室和所述排气室；
一第一零件(42)，它具有一孔，并密封地固定在所述通道内；
一阀体(50，52，54)，它安装在所述孔内，当所述吸气室处于比所述排气室较高的压力时，它可从阻塞所述吸气室和所述排气室之间的流动的第一位置移动到允许从所述吸气室向所述排气室流动的第二位置；
一释放阀(56)，它位于所述阀体里；
弹簧装置(58)，通过提供使所述阀体保持在所述第一位置的一轻微弹力而将所述阀体推压在第一位置上，由此，当所述吸气室处于比所述排气室较高的压力时，所述阀体被移动到所述第二位置；
弹簧装置(57)，通过对所述释放阀提供较强弹力而将所述释放阀推压在关闭位置上，由此，当所述排放室里的压力超过对应于所述较强弹力的数值时，所述释放阀被打开，所述排气室和所述吸气室之间建立起旁通于所述泵结构的连通。
2.如权利要求1所述的组合阀，其特征在于，所述阀体是由三个独立的零件(50，52，54)固定在一起而形成一整体。
3.如权利要求2所述的组合阀，其特征在于，所述三个独立零件包括两个具有螺纹孔的零件和具有螺纹部分、从而可安装在所述两零件的螺纹孔里、并由此形成一整体的第三零件。
4.如权利要求3所述的组合阀，其特征在于，旋接在所述两零件的所述螺纹孔里的所述第三零件调整对所述释放阀施加推压力的所述弹簧装置。
CN98103949A 1997-01-06 1998-01-06 供螺杆压缩机用的组合阀 Expired - Fee Related CN1114807C (zh)

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US08/775,999 1997-01-06
US08/775,999 US5807081A (en) 1997-01-06 1997-01-06 Combination valve for screw compressors

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CN1191958A true CN1191958A (zh) 1998-09-02
CN1114807C CN1114807C (zh) 2003-07-16

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EP (1) EP0852295B1 (zh)
JP (1) JP2939219B2 (zh)
KR (1) KR100284151B1 (zh)
CN (1) CN1114807C (zh)
AR (1) AR011364A1 (zh)
AU (1) AU716944B2 (zh)
BR (1) BR9800220A (zh)
CA (1) CA2224747C (zh)
DE (1) DE69720173T2 (zh)
ES (1) ES2191918T3 (zh)
TW (1) TW367395B (zh)

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CN1782416B (zh) * 2004-11-30 2010-05-26 乐金电子(天津)电器有限公司 一种容量可变型旋转式压缩机的迂回阀组装体
WO2007142627A1 (en) 2006-06-02 2007-12-13 Carrier Corporation Slide valve actuation for overpressure safety
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JP5324870B2 (ja) * 2008-09-22 2013-10-23 サンデン株式会社 圧縮機
MX2011007293A (es) * 2009-01-27 2011-09-01 Emerson Climate Technologies Sistema descargador y metodo para un compresor.
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CN1299008C (zh) * 2002-04-29 2007-02-07 乐金电子(天津)电器有限公司 旋转式压缩机的多腔式消音器
CN101548065B (zh) * 2006-12-05 2011-08-24 开利公司 整体式滑阀泄放阀
CN101592388B (zh) * 2008-05-27 2013-10-30 海尔集团公司 一种变容量多联机整机能力的控制方法及系统
CN103256219A (zh) * 2013-03-13 2013-08-21 曹福林 一种油田井下采油用单螺杆泵反转缓释装置
CN113719448A (zh) * 2020-05-26 2021-11-30 爱塞威汽车有限责任公司 独立阀座
US11739846B2 (en) 2020-05-26 2023-08-29 Schwäbische Hüttenwerke Automotive GmbH Separate valve seating
CN113719448B (zh) * 2020-05-26 2023-10-13 爱塞威汽车有限责任公司 独立阀座
CN112228343A (zh) * 2020-10-14 2021-01-15 广东美芝制冷设备有限公司 压缩机和制冷系统
CN112228343B (zh) * 2020-10-14 2021-11-16 广东美芝制冷设备有限公司 压缩机和制冷系统
US12085079B2 (en) 2020-10-14 2024-09-10 Guangdong Meizhi Compressor Co., Ltd. Compressor and refrigeration system
CN116696829A (zh) * 2023-08-07 2023-09-05 冰轮环境技术股份有限公司 一种用于离心压缩机的性能测试系统及测试方法
CN116696829B (zh) * 2023-08-07 2023-10-10 冰轮环境技术股份有限公司 一种用于离心压缩机的性能测试系统及测试方法

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JPH10196579A (ja) 1998-07-31
BR9800220A (pt) 1999-06-08
AU716944B2 (en) 2000-03-09
DE69720173D1 (de) 2003-04-30
KR100284151B1 (ko) 2001-03-02
MX9710454A (es) 1998-09-30
TW367395B (en) 1999-08-21
EP0852295B1 (en) 2003-03-26
EP0852295A1 (en) 1998-07-08
KR19980070339A (ko) 1998-10-26
CA2224747A1 (en) 1998-07-06
US5807081A (en) 1998-09-15
AR011364A1 (es) 2000-08-16
ES2191918T3 (es) 2003-09-16
JP2939219B2 (ja) 1999-08-25
AU5036898A (en) 1998-07-09
CN1114807C (zh) 2003-07-16
CA2224747C (en) 2001-09-18

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