US20230026533A1 - Reciprocating compressor cylinder cover - Google Patents

Reciprocating compressor cylinder cover Download PDF

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Publication number
US20230026533A1
US20230026533A1 US17/786,923 US202017786923A US2023026533A1 US 20230026533 A1 US20230026533 A1 US 20230026533A1 US 202017786923 A US202017786923 A US 202017786923A US 2023026533 A1 US2023026533 A1 US 2023026533A1
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US
United States
Prior art keywords
expansion chamber
cylinder cover
reciprocating compressor
chamber
closing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/786,923
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English (en)
Inventor
Ivan da Costa Pereira Filho
Borys Wicktor Dagostim HORBATIUK
Dietmar Erich Bernhard Lilie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Global Appliance Brasil Ltda
Original Assignee
Nidec Global Appliance Brasil Ltda
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Global Appliance Brasil Ltda filed Critical Nidec Global Appliance Brasil Ltda
Assigned to NIDEC GLOBAL APPLIANCE BRASIL LTDA. reassignment NIDEC GLOBAL APPLIANCE BRASIL LTDA. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HORBATIUK, Borys Wicktor Dagostim, PEREIRA FILHO, IVAN DA COSTA
Publication of US20230026533A1 publication Critical patent/US20230026533A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/14—Provisions for readily assembling or disassembling

Definitions

  • the present invention refers to a reciprocating compressor cylinder cover and, more particularly, to a cylinder cover provided with at least one discharge chamber.
  • reciprocating compressors comprise a compression mechanism fundamentally integrated by a compression cylinder and a movable piston, which performs alternative movements within said compression cylinder.
  • one end of the compression cylinder also receives a set of valves, which control the inflow (suction) and outlet (discharge) flows of the refrigerant gas from inside the compression cylinder.
  • This set of valves is attached to the end of the compression cylinder by a component commonly known as the cylinder cover.
  • the cylinder covers also include, in addition to the necessary fastening means, a chamber involving a discharge valve. This chamber influences thermodynamic performance and also acts to attenuate pressure transients from the compression process.
  • the cylinder cover consists of a discharge chamber, therefore, it is necessary to provide other expansion chambers arranged along the discharge inside the reciprocating compressor.
  • the current state of the art further comprises embodiments in which a cylinder cover comprises more than one discharge muffling chamber.
  • Patent document U.S. Pat. No. 5,328,338 describes, for example, a reciprocating compressor that—among other technical features—comprises a cylinder cover integrated by three chambers fluidly connected to each other in order to define three expansion chambers in the discharge sequentially arranged.
  • said cylinder cover consists of the union between a stamped metal plate and a smooth metal plate, and said stamped metal plate includes multiple ribs that, closed by the smooth metal plate, form the expansion chambers of discharge and the respective ducts that establish fluid communications between the chambers.
  • sealing means are also provided between the metal plates. It is observed, however, that the metal plates extend in a vertical direction and, therefore, this type of construction is not suitable for compact reciprocating compressors, after all, they do not have a large vertical space inside their airtight housings.
  • Patent document U.S. Pat. No. 9,587,634 describes a reciprocating compressor of which cylinder cover comprises a circular region, suitable for the interface with the free end of the compression cylinder, and two large radial projections. Said circular region comprises two chambers, each of which is fluidly connected to one of the radial projections. Each of the aforementioned radial projections also receives an additional closing body.
  • the set formed by the cylinder cover and additional closing bodies ends up defining a suction expansion chamber integrated to the cylinder cover and a discharge expansion chamber integrated to the cylinder cover, being that both the expansion chamber of suction and discharge expansion chamber each comprise two sequentially arranged volumes.
  • the closing interfaces of the openings defined in the circular region of the cylinder cover are defined in a vertical plane while the closing interfaces of the radial projections are defined in horizontal planes.
  • This divergence between the closing planes (which concern the difference between the opening planes of the muffling chambers) is notoriously responsible for a great manufacturing complexity, after all, the cylinder cover described in patent document U.S. Pat. No. 9,587,634 can only be made by an injection process that employs a complex injection mold integrated by moving parts.
  • cylinder covers comprising more than one expansion chamber either have dimensions not suitable for reciprocating compressors of different capacities (U.S. Pat. No. 5,328,338) or comprise constructions that require exaggeratedly complex manufacturing processes (U.S. Pat. No. 9,587,634), which limit the use of metal alloys, thereby impairing the compressor noise due to the low rigidity of the assembly and increasing the cost due to the need to use additional components to guarantee the closing of the chambers. It is based on this scenario that the present invention arises.
  • a reciprocating compressor cylinder cover which comprising at least one discharge chamber fluidly connected to each other, can be made of metallic material and by means of a simplistic and not excessively expensive manufacturing process.
  • the reciprocating compressor cylinder cover presented herein comprises a compact construction concept, able to guarantee that an application in reciprocating compressors of different capacities, with hermetic housings provided with different internal volumes.
  • the reciprocating compressor cylinder cover now presented has adequate rigidity to avoid resonance in the excitation frequencies of a reciprocating compressor and allows the fixation for closing through simple and inexpensive parts, such as screws and hydraulic joints.
  • the reciprocating compressor cylinder cover which comprises at least one first expansion chamber and at least one second expansion chamber fluidly connected to each other by means of at least one communication duct, the first expansion chamber being defined, at least partially, in the closing region of the compression cylinder, and the second expansion chamber being defined, at least partially, in the perpendicular projection extended from the closing region facing the same face as the compression cylinder region.
  • the first expansion chamber comprises a closing interface with the valve plate disposed on the end of the compression cylinder and the second expansion chamber comprises a closing interface with the counter parts of the discharge system, with the attachment interface of the first expansion chamber and the attachment interface of the second expansion chamber facing the same face of the component.
  • FIG. 1 shows, in front perspective, the reciprocating compressor cylinder cover according to the invention at issue
  • FIG. 2 illustrates, in posterior perspective, the reciprocating compressor cylinder cover according to the invention at issue
  • FIG. 3 shows the reciprocating compressor cylinder cover according to the invention at issue, seen from the back;
  • FIG. 4 shows the reciprocating compressor cylinder cover according to the invention at issue, seen from the front
  • FIG. 5 illustrates the section A-A taken from FIG. 4 .
  • FIG. 6 illustrates the exhaust chamber subdivided into two chambers interconnected by at least one communication duct.
  • FIG. 7 illustrates the exhaust chamber and the cylinder cover, in section, subdivided into two chambers interconnected by at least one communication duct.
  • a reciprocating compressor cylinder cover which comprises at least a first expansion chamber 1 and at least a second expansion chamber 2 fluidly connected to each other by means of at least one communication duct 3 .
  • a single first expansion chamber 1 and a single expansion chamber 2 are preferably provided, both of which are fluidly connected to each other via communication duct 3 .
  • both expansion chambers 1 and 2 as well as the communication duct 3 are made of an integral metallic body, with a tightness between the parts that allows the adjustment of the component stiffness.
  • expansion chambers 1 and 2 comprise discharge expansion chambers, their shapes and geometries being defined according to specific projects and not necessarily related to the objectives and core of the invention at issue.
  • the first expansion chamber 1 is defined in region 4 of the compression cylinder (not shown), and the second expansion chamber 2 is defined, at least partially, in region 5 extended from region 4 .
  • region 4 defines a closure region and region 5 defines a perpendicular projection.
  • the first expansion chamber 1 is opened and comprises a closing interface 11 with the valve plate (not shown) arranged on the end of the compression cylinder (not shown).
  • the first expansion chamber 1 must be attached to the valve (not shown) arranged on the end of the compression cylinder (not shown).
  • the second expansion chamber 2 comprises a closing interface 21 with a closing structure (not shown).
  • the second expansion chamber 2 needs to be attached to the closing structure (not shown).
  • This feature of the closing interface 11 of the first expansion chamber 1 and the closing interface 21 of the second expansion chamber 2 facing the same face is extremely innovative, and ends up: a) allowing the manufacture of the reciprocating cylinder cover through the manufacturing process of injection with simple and low cost tooling; b) allow the design of compact compressors; c) allow the adjustment of flexibility between the chambers, reducing the resonances in the compressor's excitation frequencies; d) allow the fixation of counter-parts of the discharge system using conventional methods of fixation in reciprocating compressors (screw and hydraulic joints); e) allow the second chamber to be subdivided into additional chambers keeping the set compact.
  • the cylinder cover of the present invention is capable of comprising an exhaust chamber that is preferably subdivided into two or more chambers interconnected by at least one communication duct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US17/786,923 2019-12-19 2020-12-18 Reciprocating compressor cylinder cover Pending US20230026533A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BRBR1020190273704 2019-12-19
BR102019027370-4A BR102019027370A2 (pt) 2019-12-19 2019-12-19 Tampa de cilindro de compressor alternativo
PCT/BR2020/050572 WO2021119794A1 (pt) 2019-12-19 2020-12-18 Tampa de cilindro de compressor alternativo

Publications (1)

Publication Number Publication Date
US20230026533A1 true US20230026533A1 (en) 2023-01-26

Family

ID=74550383

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/786,923 Pending US20230026533A1 (en) 2019-12-19 2020-12-18 Reciprocating compressor cylinder cover

Country Status (7)

Country Link
US (1) US20230026533A1 (ja)
EP (1) EP4080051B1 (ja)
JP (1) JP2023508873A (ja)
CN (1) CN115103961A (ja)
BR (1) BR102019027370A2 (ja)
MX (1) MX2022007758A (ja)
WO (1) WO2021119794A1 (ja)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817661A (en) * 1970-02-10 1974-06-18 Carrier Corp Cylinder head for a motor compressor unit
US4370104A (en) * 1980-07-22 1983-01-25 White Consolidated Industries, Inc. Suction muffler for refrigeration compressor
US20030035739A1 (en) * 2001-08-17 2003-02-20 Seung-Don Seo Hermetic reciprocating piston compressor
US20170260974A1 (en) * 2016-03-11 2017-09-14 Whirlpool S.A. Discharge Acoustic Filter, Manufacturing Process of Discharge Acoustic Filter and Hermetic Compressor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5328338A (en) * 1993-03-01 1994-07-12 Sanyo Electric Co., Ltd. Hermetically sealed electric motor compressor
CN100585176C (zh) * 2005-10-17 2010-01-27 株式会社丰田自动织机 双头活塞式压缩机
KR101854933B1 (ko) * 2013-04-24 2018-05-04 엘지전자 주식회사 압축기용 머플러 및 이를 구비한 압축기
US11105326B2 (en) * 2016-05-07 2021-08-31 Emerson Climate Technologies, Inc. Single piece valve plate assembly for a reciprocating compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817661A (en) * 1970-02-10 1974-06-18 Carrier Corp Cylinder head for a motor compressor unit
US4370104A (en) * 1980-07-22 1983-01-25 White Consolidated Industries, Inc. Suction muffler for refrigeration compressor
US20030035739A1 (en) * 2001-08-17 2003-02-20 Seung-Don Seo Hermetic reciprocating piston compressor
US20170260974A1 (en) * 2016-03-11 2017-09-14 Whirlpool S.A. Discharge Acoustic Filter, Manufacturing Process of Discharge Acoustic Filter and Hermetic Compressor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Pressure/Flow Loss in Pipe Bends: Better to Go Long or Bend?, by tuneruniversity.com, (URL: https://web.archive.org/web/20180113133110/https://www.tuneruniversity.com/blog/2012/07/pressureflow-loss-in-pipe-bends-better-to-go-long-or-bend/ (Year: 2018) *

Also Published As

Publication number Publication date
CN115103961A (zh) 2022-09-23
JP2023508873A (ja) 2023-03-06
WO2021119794A1 (pt) 2021-06-24
EP4080051B1 (en) 2024-06-05
MX2022007758A (es) 2022-07-19
EP4080051A1 (en) 2022-10-26
BR102019027370A2 (pt) 2021-06-29

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