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
  • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
  • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
  • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2253/00—Other material characteristics; Treatment of material
  • F05C2253/12—Coating

Definitions

• the present invention relates to a linear compressor, in particular for use for compressing refrigerant in a refrigeration device.
• a linear compressor according to the preamble of claim 1 is known.
• a circumferential cavity is formed in the wall of the cylinder, which is supplied with pressurized fluid and communicates with the interior of the cylinder in which the piston moves through a plurality of openings distributed over the side wall of the cylinder.
• Pressure fluid entering from these openings into the cylinder chamber forms a cushion on which the piston slides without contact with the side wall. Since the pad prevents frictional contact between the piston and the cylinder, such a linear compressor can operate for a long time in continuous operation, without frictional wear leading to a noticeable decrease in the efficiency.
• the object of the present invention is to further develop the linear compressor according to the preamble in such a way that it has a constant efficiency even during long-term operation in a practical application such as a refrigeration device.
• the object is achieved in that facing side surfaces of the piston and the cylinder at least one is provided with an abrasion-resistant sliding layer.
• Compressor is lower than during continuous operation, the cushion is not sufficiently effective to prevent frictional contact between the side surfaces of the piston and cylinder. In order to prevent wear in these operating phases, the abrasion-resistant sliding layer is required.
• Fig. 1 is a perspective view of a linear compressor
• Fig. 2 is a section through the cylinder of the linear compressor.
• the linear compressor shown in a perspective view in Fig. 1 has a rigid, in plan view in approximately U-shaped frame, which is composed of three parts, namely two flat wall pieces 1 and a sheet 2. Between facing end faces of the sheet 2 and the two wall pieces 1, a first diaphragm spring 3 is clamped; a second diaphragm spring 4 of the same shape as the diaphragm spring 3 is attached to the end faces of the wall pieces 1 facing away from the arc.
• the membrane springs 3, 4 punched from spring plate each have two elongated edge strips 7 which cover the end faces of the wall pieces 1 and of the arch 2, respectively, and four spring arms 5 which extend in zigzag from the ends of the edge strips 7 to a middle section 6, where they meet.
• the central portion 6 has three holes, two outer, to which by means of screws or rivets 13, a permanent magnetic oscillating body 8 is suspended, and a central bore through which in the diaphragm spring 3 a to the oscillating body 8, z. B. by screwing, fixed rod portion 10 extends.
• the rod portion 10 is connected to a transmission rod 9 via a flexibly flexible tapered portion 11.
• a second tapered portion 12 connects the transmission rod 11 integrally with a piston rod 14, which engages in a pumping chamber 15 supported by the arc 2, is guided through a bore in an end wall of the pumping chamber and in the pumping chamber 15 with a piston 16 therein (see Fig. 2) is connected.
• Two electromagnets with E-shaped yoke and a wound around the middle leg of the E coil are each arranged between the oscillating body 8 and the wall pieces 1 with the oscillating body facing pole pieces and serve to drive a vibrating movement of the vibrating body.
• the pumping chamber 15 is annularly surrounded by a cavity 17 which communicates with the pumping chamber 15 through a plurality of openings 18 in the side wall thereof and which is fed via a passage 19 with compressed gas branched from a pressure port 20 of the pumping chamber.
• the pressure gas entering through the openings 18 in the pumping chamber 15 forms on the side wall a cushion on which the piston 16, whose diameter is slightly smaller than the free diameter of the pumping chamber 15, slides substantially without friction.
• the lateral surface of the piston 16 sliding along the wall of the pumping chamber 15 is coated with a DLC (diamond-like carbon) layer 21.
• the DLC layer 21 may be a tetrahedral carbon layer (ta-C) or an amorphous hydrogen-containing carbon layer (a-C: H).
• ta-C tetrahedral carbon layer
• a-C amorphous hydrogen-containing carbon layer

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Compressor (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35709076

Family Applications (1)

Country Status (7)

Cited By (4)

Families Citing this family (9)

Citations (5)

• 2004
  • 2004-12-23 DE DE102004062303A patent/DE102004062303A1/de not_active Withdrawn
• 2005
  • 2005-11-30 EP EP05810968A patent/EP1831554B1/de not_active Not-in-force
  • 2005-11-30 CN CN200580044097A patent/CN100582483C/zh not_active Expired - Fee Related
  • 2005-11-30 RU RU2007121773/06A patent/RU2007121773A/ru unknown
  • 2005-11-30 WO PCT/EP2005/056342 patent/WO2006069881A1/de active Application Filing
  • 2005-11-30 AT AT05810968T patent/ATE541128T1/de active
  • 2005-11-30 ES ES05810968T patent/ES2377221T3/es active Active

Patent Citations (5)

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