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 relates to a reciprocating compressor cylinder cover and, more particularly, 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 reciprocating movements inside said compression cylinder.
• a compression mechanism fundamentally integrated by a compression cylinder and a movable piston, which performs reciprocating movements inside said compression cylinder.
• one of the ends of the compression cylinder still receives a set of valves, which control the inflow (suction) and exit (discharge) of refrigerant gas from the interior of the compression cylinder.
• This valve assembly is attached to the end of the compression cylinder by a component commonly referred to as a cylinder cap.
• the cylinder caps further include, in addition to the necessary fastening means, a chamber surrounding a discharge valve. This chamber influences the thermodynamic performance and also acts in the attenuation of pressure transients arising from the compression process.
• the cylinder cover is constituted by a discharge chamber, being necessary, therefore, the provision of other expansion chambers arranged along the discharge inside the reciprocating compressor.
• REPLACEMENT SHEETS (RULE 26) further comprises embodiments in which a cylinder cap comprises more than one discharge muffling chamber.
• Patent document US5328338 describes, for example, a reciprocating compressor that - among other technical particulars - comprises a cylinder cover integrated by three chambers fluidly connected together in order to define three expansion chambers in the discharge sequentially arranged.
• said cylinder cover is composed of the union between a stamped metal sheet and a flat metal sheet, said stamped metal sheet including multiple ribs which, closed by the flat metal plate, form the expansion chambers of discharge and the respective ducts that establish the fluid communication between the chambers.
• sealing means are also provided between the metal sheets. It is observed, however, that the metal sheets extend vertically 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 hermetic casings.
• Patent document US9587634 describes a reciprocating compressor whose 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. In this way, the formed set
• REPLACEMENT SHEETS (RULE 26) 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 suction expansion chamber and the expansion chamber discharge compartments each comprise two sequentially arranged volumes.
• the closing interfaces of the openings defined in the circular region of the cylinder cap are defined in a vertical plane while the closing interfaces of the radial projections are defined in horizontal planes.
• the reciprocating compressor cylinder cover presented herein comprises a compact constructive concept, capable of ensuring that an application in reciprocating compressors of different capacities, with hermetic casings provided with different internal volumes.
• the reciprocating compressor cylinder cover herein presented has adequate rigidity to avoid resonances in the excitation frequencies of a reciprocating compressor and allow fastening for closing through simple and inexpensive parts, such as screws and hydraulic joints.
• the reciprocating compressor cylinder cover which comprises at least a first expansion chamber and at least a second expansion chamber fluidly connected to each other by means of at least one duct of communication, the first expansion chamber being defined, at least partially, in the region of
• REPLACEMENT SHEETS (RULE 26) closure of the compression cylinder, and the second expansion chamber being defined, at least partially, in the perpendicular projection extended from the closure region facing the same face as the region of the compression cylinder.
• the first expansion chamber comprises a closing interface with the valve plate disposed at the end of the compression cylinder and the second expansion chamber comprises a closing interface with the counter-parts of the discharge system, wherein the first expansion chamber attachment interface and the second expansion chamber attachment interface face the same face of the component.
• Figure 1 illustrates, in front perspective, the reciprocating compressor cylinder cover according to the invention in question
• Figure 2 illustrates, in rear perspective, the reciprocating compressor cylinder cover according to the invention in question
• Figure 3 illustrates the reciprocating compressor cylinder cover according to the invention in question, seen later;
• Figure 4 illustrates the reciprocating compressor cylinder cover according to the invention in question, seen from the front;
• Figure 5 illustrates section A-A taken from figure 4.
• Figure 6 illustrates the exhaust chamber subdivided into two chambers interconnected by at least one communication duct.
• Figure 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 comprising at least a first expansion chamber 1 and at least one 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 being fluidly connected to each other by means of a communication duct 3.
• both the expansion chambers 1 and 2 and the communication duct 3 are made of an integral metallic body, with a friction between the parts that allows the adjustment of the component's rigidity.
• 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 in question .
• the first expansion chamber 1 is defined in region 4 of the compression cylinder (not shown), and the second chamber
• REPLACEMENT SHEETS (RULE 26) of expansion 2 is defined, at least partially, in region 5 extended from region 4. It is worth noting that, as seen in the figures, region 4 defines a closing region and region 5 defines a perpendicular projection.
• the first expansion chamber 1 is open and comprises a closing interface 11 with the valve plate (not shown) disposed at the end of the compression cylinder (not illustrated).
• the first expansion chamber 1 needs to be attached to the valve (not shown) arranged at the end of the compression cylinder (not shown).
• the second expansion chamber 2 comprises a closure interface 21 with a closure structure (not shown).
• the second expansion chamber 2 needs to be attached to the closure frame (not shown).
• closure interface 11 of the first expansion chamber 1 and the closure interface 21 of the second expansion chamber 2 being facing the same face is extremely innovative, and ends up:
• REPLACEMENT SHEETS (RULE 26) a) allow the manufacture of the reciprocating compressor cylinder cover through the injection factory process with simple and low cost tooling; b) allow the design of compact compressors; c) allow the adjustment of flexibility between the chambers, reducing resonances in the compressor excitation frequencies; d) allow the attachment of counter-parts of the discharge system through conventional methods of attachment in reciprocating compressors (screw and hydraulic joints); e) allow the second chamber to be subdivided into additional chambers keeping the whole 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)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=74550383

Family Applications (1)

Country Status (7)

Citations (3)

Family Cites Families (5)

• 2019
  • 2019-12-19 BR BR102019027370-4A patent/BR102019027370A2/pt unknown
• 2020
  • 2020-12-18 WO PCT/BR2020/050572 patent/WO2021119794A1/pt unknown
  • 2020-12-18 MX MX2022007758A patent/MX2022007758A/es unknown
  • 2020-12-18 JP JP2022537379A patent/JP2023508873A/ja active Pending
  • 2020-12-18 EP EP20848982.3A patent/EP4080051B1/en active Active
  • 2020-12-18 CN CN202080096765.3A patent/CN115103961A/zh active Pending
  • 2020-12-18 US US17/786,923 patent/US20230026533A1/en active Pending

Patent Citations (3)

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