Classifications

• • 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
  • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
• • 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
  • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
  • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
  • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
  • F04C18/0269—Details concerning the involute wraps

Definitions

• the present invention relates to a scroll type compressor.
• a scroll compressor has a suction chamber at the outer periphery, a discharge port at the center of the spiral, and two symmetrical spiral compressions where the fluid joins the discharge port. The space is compressed sequentially from the outer peripheral portion toward the central compression chamber to perform a compressing action.
• Fig. 1 and Fig. 2 show the structure of a conventional scroll compressor.
• a scroll compressor 2 and a motor 3 are built in a closed container 1.
• Scroll compressor 2 Mainly composed of fixed scroll 4, revolving scroll 5, rotation prevention mechanism 6, crank shaft 7, frame 8, and bearing 9. I have.
• a fixed scroll 4 I is provided with a spiral wrap 11 standing upright on the end plate 10, and the wrap 11 is a conventional force, as is known in the art.
• Rhythm ⁇ ⁇ Fountain This is formed by curves combining arcs.
• a suction hole 12 for sucking the compressed gas is provided in the outer peripheral portion.
• a suction chamber 13 communicating with the suction hole 12 is provided with a discharge hole 14 in the center of the end plate 10.
• the turning scroll 5 has a head plate 15 and a spiral wrap 16 standing upright.
• the shapes of the wraps 11 and 16 of the fixed scroll 4 and the swivel scroll 5 are symmetrical with respect to each other, and the angles are shifted by 180 °. ing.
• the fixed scroll 4 and the turning scroll 5 are combined so that the centers of the spirals are shifted by the turning radius.
• the other two wraps 11 and 16 are in contact or close to each other at a plurality of points (hereinafter referred to as contact), and a plurality of compression chambers 17 are formed.
• a boss portion 18 into which a crank shaft 7 is inserted is provided on the back of the turning scroll 5.
• a rotation preventing mechanism 6 is incorporated between the back of the turning scroll 5 and the frame 8.
• the crankshaft 7 is supported by a frame 8 via a bearing 9, one end of which is fitted with a rotor of the motor 3, and the other end of which is a boss of the orbiting scroll 5. Has been inserted in 1 8.
• Fig. 2 shows a plan view of both scroll wraps.
• the fixed scroll mouth is a rotating scroll that pivots to the end points 11a and 11b of the loop wrap 5. Compression starts from the point of contact, but is set to zero or a very small value to improve the radial gap seal between the scroll wraps. That is, the orbiting scroll 5 is performing a turning motion while colliding with the fixed scroll opening / loop end point 11a. This collision caused both scrolls This can cause rupture of the wrap and noise. In addition, the turning scroll 5 is performing a turning motion without colliding with the fixed scroll wrap end point 11b. This collision may cause destruction of both scroll wraps and generate noise.
• the present invention has been made to solve the above-described problems, and has as its object to prevent a collision of the swivel scroll with the end point of the fixed scroll portal suction chamber side. It is what you do.
• Another object of the present invention is to prevent collision of the turning scroll with the fixed scroll wrap end point 11b.
• the present invention is provided with a relief in a wrap near the fixed scroll suction chamber side end point.
• the present invention provides a relief in the vicinity of the wrap end point of the turning scroll.
• Fig. 1 is a longitudinal section showing a conventional scroll compressor.
• 3 ⁇ 4 Fig. 2 is a cross section of the scroll wrap section in Fig. 3 a.
• Fig. 3 is a sectional view of a first embodiment of the present invention.
• FIG. 4 is an enlarged view of the vicinity of the end point of the scroll wrap according to the second embodiment of the present invention.
• FIG. 4 shows the shape before embodying the present invention. That is, as shown in Fig. 3, the wrap near the end point of the fixed scroll on the suction chamber side is provided with an arc or straight relief.
• the length 1 of this clearance should be about the turning radius, and the clearance m at the end point is a maximum of the clearance between the bearing and the crankshaft and the clearance between the boss and the crankshaft. It just needs to be added.
• FIG. Fig. 2 shows both scroll wraps at the start of compression.
• Fig. 2 is an enlarged view near 11b in Fig. 2, and an arc or a straight line escapes near the end of the orbiting scroll wrap.
• the clearance length 1 may be about the turning radius, and the maximum clearance m is the sum of the clearance between the bearing crank shaft and the clearance between the boss and the crank shaft.
• the turning scroll gradually contacts the wrap of the fixed scroll without colliding at the end point lib, causing damage to both wraps and generating noise. Can be eliminated.
• collision at the end point lib can also be avoided, resulting in damage to both laps and noise. Becomes even smaller.
• a relief is provided near the end point of the fixed scroll wrap.
• the fixed scroll of the turning scroll This makes it possible to avoid collision with the wrap, and to obtain a scroll compressor with high durability, high reliability and low noise.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Rotary Pumps (AREA)
• Applications Or Details Of Rotary Compressors (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=17712043

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Citations (2)

Family Cites Families (1)

• 1989
  • 1989-11-02 JP JP28702389A patent/JP2723635B2/ja not_active Expired - Lifetime
• 1990
  • 1990-11-02 KR KR1019910700665A patent/KR950000263B1/ko not_active Expired - Lifetime
  • 1990-11-02 WO PCT/JP1990/001425 patent/WO1991006777A1/ja not_active Ceased
  • 1990-11-02 DE DE19904092107 patent/DE4092107T/de not_active Withdrawn

Patent Citations (2)

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