JP2015059521A - Anodic oxidation treatment apparatus and anodic oxidation treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately treat a surface of a scroll of a scroll compressor.SOLUTION: An anodic oxidation treatment apparatus 1 includes: an anodic oxidation treatment apparatus main body performing a surface treatment on a surface of a scroll 10 used in a scroll compressor by immersing the scroll 10 in a treatment liquid; and a rotating device 5 rotating the scroll 10 around a rotational axis 6 parallel to a central axis of a spiral part of the scroll 10. Such an anodic oxidation treatment apparatus 1 can form a flow of the treatment liquid near the surface of the scroll 10 by rotating the scroll 10, and prevent air bubbles from being stagnated near the surface of the scroll 10. Such an anodic oxidation treatment apparatus 1 can contact the treatment liquid with the surface of the scroll 10 more surely, and appropriately treat the surface of the scroll 10 by preventing the stagnation of the air bubbles near the surface of the scroll 10.

Description

  The present invention relates to an anodizing apparatus and anodizing method, and more particularly to an anodizing apparatus and anodizing method used when surface-treating a scroll of a scroll compressor.

  A scroll compressor that compresses gas using a pair of scrolls is known. One orbiting scroll of the pair of scrolls has an anodized surface in contact with the other fixed scroll.

Japanese Patent Laid-Open No. 6-128791 JP-A-6-330397 JP-A-10-158888

  In the anodizing treatment, it is known that bubbles are generated from the anodized surface. The surface to be anodized may be deficient in film thickness due to the bubbles remaining in the vicinity, and the anodized film forming reaction does not proceed (see Patent Documents 1 to 3). It is desired to appropriately surface-treat the scroll of the scroll compressor.

  An object of the present invention is to provide an anodizing apparatus and anodizing method for appropriately surface-treating a scroll of a scroll compressor.

  An anodizing apparatus according to the present invention includes an anodizing apparatus body for surface-treating a scroll surface used by immersing a scroll used in a scroll compressor in a processing liquid, and a central axis of a spiral portion of the scroll. And a rotation device that rotates the scroll around a parallel rotation axis.

  In such an anodizing apparatus, by rotating the scroll, a flow of the treatment liquid is formed in the vicinity of the surface of the scroll, and bubbles can be prevented from staying in the vicinity of the surface of the scroll. Such an anodizing apparatus can prevent the bubbles from staying in the vicinity of the surface of the scroll, thereby bringing the treatment liquid into contact with the surface of the scroll more reliably and appropriately treating the surface of the scroll. it can.

  The rotating device rotates the scroll so that a region of the plane including the rotation axis that intersects with the spiral portion moves away from the rotation axis.

  Such an anodizing apparatus can form a flow of processing liquid that flows outward from the central axis of the spiral portion by rotating the scroll in such a direction. For this reason, such an anodizing apparatus can discharge the bubbles staying in the vicinity of the surface of the scroll from the outward-facing opening formed in the spiral portion. In such an anodizing apparatus, by discharging the bubbles from the outward-facing opening, the treatment liquid can be more reliably brought into contact with the surface of the scroll and the surface of the scroll can be appropriately surface-treated.

  The anodizing apparatus according to the present invention further includes a nozzle that injects the treatment liquid into a region of the spiral portion that intersects the rotation axis.

  Such an anodizing apparatus can appropriately form the flow of the treatment liquid flowing from the central axis of the spiral portion to the outside, and appropriately discharge bubbles remaining in the vicinity of the scroll surface from the outward opening. can do. In such an anodizing apparatus, by appropriately discharging bubbles from the outward-facing opening, the treatment liquid can be more reliably brought into contact with the surface of the scroll, and the surface of the scroll can be appropriately surface-treated.

  An anodizing apparatus according to the present invention is formed on the outside of a scroll portion of an anodizing apparatus main body for surface-treating the surface of the scroll by immersing a scroll used in a scroll compressor in a treatment liquid. And a nozzle for injecting the processing liquid toward the outward opening.

  Such an anodizing apparatus forms a flow of the processing liquid that flows from the outer side of the spiral part toward the central axis along the peripheral surface of the spiral part by injecting the processing liquid toward the outward opening. It is possible to prevent bubbles from staying in the vicinity of the scroll surface. Such an anodizing apparatus can prevent the bubbles from staying in the vicinity of the surface of the scroll, thereby bringing the treatment liquid into contact with the surface of the scroll more reliably and appropriately treating the surface of the scroll. it can.

  The anodizing apparatus according to the present invention further includes a cooling device that generates a cooling treatment liquid by cooling the treatment liquid. At this time, the nozzle sprays the cooling treatment liquid onto the spiral portion.

  In such an anodizing apparatus, the scroll is cooled by using the cooling treatment liquid, so that the scroll is prevented from being overheated during the surface treatment, and the surface of the scroll can be appropriately surface-treated.

  In the anodizing method according to the present invention, the surface of the scroll is surface-treated by immersing the scroll used in the scroll compressor in the treatment liquid, and the surface is being surface-treated. Rotating the scroll around a rotation axis that is parallel to the central axis of the spiral portion.

  In such an anodizing method, the flow of the treatment liquid is formed in the vicinity of the scroll surface by rotating the scroll, and bubbles can be prevented from staying in the vicinity of the scroll surface. Such an anodizing method can prevent the bubbles from staying in the vicinity of the surface of the scroll, thereby bringing the treatment liquid into contact with the surface of the scroll more reliably and appropriately treating the surface of the scroll. it can.

  In the anodizing method according to the present invention, the surface of the scroll is surface-treated by immersing the scroll used in the scroll compressor in the treatment liquid, and the surface is being surface-treated. Spraying the processing liquid toward an outward-facing opening formed outside the spiral portion.

  In such an anodizing treatment method, the treatment liquid is ejected toward the outward opening, thereby forming a flow of the treatment liquid flowing from the outside of the spiral portion toward the central axis along the peripheral surface of the spiral portion. It is possible to prevent bubbles from staying in the vicinity of the scroll surface. Such an anodizing method can prevent the bubbles from staying in the vicinity of the surface of the scroll, thereby bringing the treatment liquid into contact with the surface of the scroll more reliably and appropriately treating the surface of the scroll. it can.

  The anodizing apparatus and the anodizing method according to the present invention prevent the bubbles from staying on the surface of the scroll by generating a flow of the treatment liquid in the vicinity of the surface of the scroll, and appropriately surface-treat the scroll. be able to.

It is sectional drawing which shows an anodizing apparatus. It is a perspective view which shows a scroll. It is sectional drawing which shows another anodizing apparatus. It is a perspective view which shows the other rotation direction of a scroll. It is sectional drawing which shows another anodizing apparatus. It is a perspective view which shows the position of a nozzle.

  An embodiment of an anodizing apparatus will be described below with reference to the drawings. As shown in FIG. 1, the anodizing apparatus 1 includes a processing tank 2, a masking rubber 3, and a rotating device 5. The processing tank 2 forms a storage space and stores the processing liquid in the storage space. The treatment liquid is an electrolytic solution in which the electrolyte is dissolved, and diluted sulfuric acid is exemplified.

  The masking rubber 3 is made of rubber. The masking rubber 3 holds the scroll 10. The masking rubber 3 further covers a part of the scroll 10. The rotating device 5 supports the masking rubber 3 so that the scroll 10 held by the masking rubber 3 can rotate around the rotation shaft 6. The rotating shaft 6 is substantially parallel to the vertical direction. The rotating device 5 rotates the scroll 10 about the rotation shaft 6 when operated by the user while supporting the masking rubber 3 holding the scroll 10.

  The anodizing apparatus 1 further includes a pump 7, a cooling device 8, and a nozzle 11. The pump 7 is operated by the user to take in the processing liquid stored in the processing tank 2 and supply the processing liquid to the cooling device 8. The cooling device 8 cools the processing liquid supplied from the pump 7. The cooling device 8 supplies the cooled processing liquid to the nozzle 11 when the processing liquid is supplied from the pump 7.

  The nozzle 11 is disposed at the bottom of the storage space of the processing tank 2 so as to overlap the rotating shaft 6 and is disposed so that the tip is directed vertically upward. The nozzle 11 injects the processing liquid into the storage space of the processing tank 2 so that the processing liquid flows vertically upward along the rotation shaft 6 when the processing liquid is supplied from the cooling device 8.

  The anodizing apparatus 1 further includes a power supply device 12 and a counter electrode (not shown). The counter electrode is disposed in the storage space of the processing tank 2 and is immersed in the processing liquid stored in the processing tank 2. The power supply device 12 is electrically connected to the counter electrode via wiring, and is electrically connected to the scroll 10 supported by the rotating device 5 via the masking rubber 3. The power supply device 12 applies a predetermined voltage to the scroll 10 with respect to the counter electrode when operated by the user.

  FIG. 2 shows the scroll 10. The scroll 10 is made of metal aluminum and includes a disk portion 21 and a spiral portion 22. The disc portion 21 is formed in a generally disc shape. The spiral portion 22 is formed in a band shape wound around the central shaft 23 in one direction. That is, the spiral portion 22 is formed such that the central axis side end 24 of the band is disposed in the vicinity of the central axis 23 and is further away from the central axis 23 as approaching the outer end 25 opposite to the central axis side end 24. Has been. The spiral portion 22 has one side of the band joined to one side of the disk portion 21. The scroll 10 further has a bearing housing portion (not shown) formed on the surface opposite to the surface where the spiral portion 22 of the disk portion 21 is joined.

  The scroll 10 has an inner bottom surface 27, an inner peripheral surface 28, and an outer peripheral surface 29. The inner bottom surface 27 is a region that is not joined to the spiral portion 22 of the surface of the disk portion 21 to which the spiral portion 22 is joined. The inner bottom surface 27 is perpendicular to the central axis 23. The inner peripheral surface 28 is a surface facing the central axis 23 side of the surface of the spiral portion 22. The outer peripheral surface 29 is the back surface of the inner peripheral surface 28 of the spiral portion 22. The inner peripheral surface 28 and the outer peripheral surface 29 are parallel to the central axis 23.

  The scroll 10 further has an outward opening 31 and an axial opening 32 formed therein. The outward-facing opening 31 is formed outside the spiral portion 22 of the scroll 10 and is formed in a region sandwiched between the outer end 25 and the outer peripheral surface 29 of the spiral portion 22. The axial opening 32 is a region that opens in a direction parallel to the central axis 23 of the spiral portion 22, and is surrounded by a side opposite to the side that is joined to the disk portion 21 of the spiral portion 22. It is an area.

  The embodiment of the anodizing method is performed using the anodizing apparatus 1. The masking rubber 3 covers the bearing housing portion and the surface of the disk portion 21 where the bearing housing portion is formed, and holds the scroll 10. Furthermore, after the masking rubber 3 holds the scroll 10, the rotating device 5 has the scroll 10 in the processing liquid stored in the processing tank 2 so that the axial opening 32 of the scroll 10 faces vertically downward. The scroll 10 is supported via the masking rubber 3 so as to be immersed and so that the central axis 23 of the scroll 10 substantially overlaps the rotating shaft 6.

  When the processing liquid is stored in the processing tank 2, the pump 7 sucks the processing liquid and supplies the processing liquid to the cooling device 8. The cooling device 8 cools the processing liquid supplied from the pump 7 and supplies the cooled processing liquid to the nozzle 11. The nozzle 11 injects the processing liquid toward the vicinity of the central axis 23 in the axial opening 32 of the scroll 10 when the scroll 10 is immersed in the processing liquid.

  When the scroll 10 is immersed in the processing liquid, the power supply device 12 applies a predetermined voltage to the scroll 10 with respect to the counter electrode immersed in the processing liquid. As shown in FIG. 2, the rotating device 5 is configured such that, when a predetermined voltage is applied to the scroll 10, a region intersecting the spiral portion 22 in a plane including the rotating shaft 6 moves away from the rotating shaft 6. Next, the scroll 10 is rotated in the scroll rotation direction 34 around the rotation shaft 6. The power supply device 12 continues to apply a predetermined voltage to the scroll 10 until a predetermined anodic oxide film is formed on the surface of the scroll 10.

  When the scroll 10 is immersed in the treatment liquid, a predetermined voltage is applied, so that the anodization reaction proceeds on the surface in contact with the treatment liquid, and the surface in contact with the treatment liquid is anodized. A film is formed.

  As the anodic oxidation reaction proceeds in the scroll 10, oxygen is further generated on the surface in contact with the treatment liquid, and oxygen bubbles are generated. The oxygen bubbles may stay in the vicinity of the surface (particularly, the inner bottom surface 27) of the scroll 10 that is in contact with the treatment liquid. In the scroll 10, since the oxygen bubbles stay, the formation of the anodized film on the surface in the vicinity of the area where the bubbles stay is inhibited, and the thickness of the anodized film formed on the surface May become thinner.

  The treatment liquid disposed in the region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29 of the scroll 10 is rotated by the scroll 10 in the scroll rotation direction 34 and the axial opening 32 of the scroll 10. By supplying the processing liquid to the vicinity of the central axis 23, the liquid flows along the liquid flow direction 35 as shown in FIG. 2. The bubbles staying in the vicinity of the inner bottom surface 27, the inner peripheral surface 28, and the outer peripheral surface 29 of the scroll 10 move along with the flow of the processing liquid when the processing liquid flows in the liquid flow direction 35, and face outward. It is discharged from the opening 31. The surface of the scroll 10 can be more reliably brought into contact with the processing liquid when the bubbles are separated from the surface of the scroll 10. As the surface of the scroll 10 comes into contact with the treatment liquid more reliably, an anodized film can be appropriately formed.

  That is, according to such an anodizing method, the anodizing apparatus 1 can more reliably bring the treatment liquid into contact with the surface of the scroll 10 and appropriately form the anodized film on the surface of the scroll 10. The scroll 10 can be appropriately surface-treated.

  The anodizing apparatus 1 further adjusts the rotational speed for rotating the scroll 10 or the speed at which the processing liquid is sprayed, whereby the flow speed at which the processing liquid flows in the region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29. Can be adjusted. Furthermore, the anodizing apparatus 1 can reliably separate the bubbles from the inner bottom surface 27 even when there is a step on the inner bottom surface 27 by appropriately adjusting the flow rate. For this reason, the anodizing apparatus 1 can appropriately form an anodized film on the surface of the inner bottom surface 27 by separating the bubbles from the inner bottom surface 27 even when there is a step on the inner bottom surface 27. 27 can be appropriately surface-treated.

  The scroll 10 may be overheated by reaction heat due to the anodic oxidation reaction. When the scroll 10 is overheated, an anodized film may not be properly formed. The anodizing apparatus 1 can cool the scroll 10 with high efficiency by injecting the treatment liquid cooled by the cooling device 8 onto the scroll 10. The anodizing apparatus 1 can prevent the scroll 10 from being overheated by appropriately cooling the scroll 10. The anodizing apparatus 1 can appropriately form an anodized film on the surface of the scroll 10 by preventing the scroll 10 from being overheated, and can appropriately surface-treat the scroll 10.

  Further, the nozzle 11 is disposed at the position where the nozzle 11 was disposed when the surface of the scroll 10 was surface-treated even when surface-treating another scroll having a different shape (for example, diameter and number of turns) from the scroll 10. The That is, the anodizing apparatus 1 does not need to change the position of the nozzle 11 according to the scroll, and can easily surface-treat the scroll 10.

  The nozzle 11 is replaced with another nozzle that supplies the processing liquid to a region different from the position close to the central axis 23 when the bubbles can be sufficiently separated from the surface of the scroll 10 only by rotating the scroll 10. Can be done. Similarly to the anodizing apparatus in the above-described embodiment, the anodizing apparatus provided with such a nozzle makes the treatment liquid come into contact with the surface of the scroll 10 more reliably and appropriately surface-treats the scroll 10. be able to.

  FIG. 3 shows another embodiment of the anodizing apparatus. In the anodizing apparatus 41, the nozzle 11 of the anodizing apparatus 1 in the above-described embodiment is replaced with another nozzle 42. The nozzle 42 is disposed in the storage space of the processing tank 2. The nozzle 42 injects the processing liquid supplied from the cooling device 8 into the storage space of the processing tank 2. The region where the treatment liquid is ejected by the nozzle 42 is different from the region in the vicinity of the central axis 23 in the axial opening 32, for example, the region where the scroll 10 is not disposed in the storage space of the treatment tank 2. .

  The rotating device 5 of the anodizing device 41 is arranged such that when a predetermined voltage is applied to the scroll 10, the region intersecting the spiral portion 22 in the plane including the rotating shaft 6 approaches the rotating shaft 6. As shown in FIG. 4, the scroll 10 is rotated in the scroll rotation direction 44 around the rotation shaft 6.

  The processing liquid flows into the region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29 of the scroll 10 from the outward-facing opening 31 of the scroll 10 when the scroll 10 is rotated in the scroll rotation direction 44. Further, as shown in FIG. 4, the processing liquid flows along a liquid flow direction 45 in a region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29 of the scroll 10, and the center of the axial openings 32. It is discharged from the area near the shaft 23. The bubbles staying in the vicinity of the inner bottom surface 27, the inner peripheral surface 28, and the outer peripheral surface 29 of the scroll 10 move along with the flow of the processing liquid when the processing liquid flows in the liquid flow direction 45, and the axial direction It is discharged from the opening 32.

  In other words, the anodizing apparatus 41 rotates the scroll 10 in the scroll rotation direction 44, so that the treatment liquid is more reliably applied to the surface of the scroll 10 in the same manner as the anodizing apparatus 1 in the above-described embodiment. The scroll 10 can be appropriately surface-treated.

  Note that the rotating device 5 of the anodizing apparatus 41 can periodically repeat the rotation direction in which the scroll 10 is rotated about the rotating shaft 6. Even in such a case, the processing liquid flows in a region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29 of the scroll 10, and bubbles can be separated from the surface of the scroll 10. For this reason, even in such a case, the anodizing apparatus 41 can bring the treatment liquid into contact with the surface of the scroll 10 more reliably and appropriately surface-treat the scroll 10.

  FIG. 5 shows another embodiment of the anodizing apparatus. In the anodizing apparatus 51, the rotating device 5 of the anodizing apparatus 1 in the above-described embodiment is omitted, and the nozzle 11 is replaced with another nozzle 52. The nozzle 52 is disposed in the storage space of the processing tank 2. As shown in FIG. 6, the nozzle 52 is disposed in the vicinity of the outward-facing opening 31 of the scroll 10, and the tip is disposed facing the outward-facing opening 31.

  The nozzle 52 injects the processing liquid toward the outward opening 31 of the scroll 10 when the scroll 10 is immersed in the processing liquid. The processing liquid is injected toward the outward opening 31 of the scroll 10, and thus flows from the outward opening 31 of the scroll 10 into a region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29 of the scroll 10. . Further, the processing liquid flows toward the central axis 23 through a region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29 of the scroll 10, and is discharged from a region near the central shaft 23 in the axial direction opening 32. The The bubbles staying in the vicinity of the inner bottom surface 27, the inner peripheral surface 28, and the outer peripheral surface 29 of the scroll 10 flow through the region sandwiched between the inner peripheral surface 28 and the outer peripheral surface 29. It moves with the flow of the processing liquid and is discharged from the axial opening 32.

  That is, the anodizing apparatus 51 injects the processing liquid toward the outward-facing opening 31 so that the processing liquid is applied to the surface of the scroll 10 in the same manner as the anodizing apparatus 1 in the above-described embodiment. The scroll 10 can be reliably contacted and the surface of the scroll 10 can be appropriately treated.

  The anodizing apparatuses 1, 41, 51 can omit the cooling device 8 when a sufficiently large amount of processing liquid is stored so that the scroll 10 is not overheated. At this time, the pump 7 supplies the processing liquid to the nozzles 11, 42 and 52. The nozzles 11, 42, 52 inject the processing liquid supplied from the pump 7. Similarly to the anodizing apparatus in the above-described embodiment, the anodizing apparatus in which the cooling device 8 is omitted also brings the treatment liquid into more reliable contact with the surface of the scroll 10 to appropriately treat the scroll 10. can do.

1: Anodizing treatment device 2: Treatment tank 3: Masking rubber 5: Rotating device 6: Rotating shaft 7: Pump 8: Cooling device 10: Scroll 11: Nozzle 21: Disk part 22: Spiral portion 23: Central shaft 24: Center Axis side end 25: Outer end 27: Inner bottom surface 28: Inner peripheral surface 29: Outer peripheral surface 31: Outward facing opening 32: Axial opening 34: Scroll rotation direction 35: Liquid flow direction 41: Anodizing apparatus 42: Nozzle 44: Scroll rotation direction 45: Liquid flow direction 51: Anodizing device 52: Nozzle

Claims (7)

An anodizing apparatus main body for surface-treating the surface of the scroll by immersing the scroll used in the scroll compressor in the treatment liquid;
An anodizing apparatus comprising: a rotating device that rotates the scroll around a rotation axis that is parallel to a central axis of a spiral portion of the scroll.   2. The anodizing apparatus according to claim 1, wherein the rotating device rotates the scroll so that a region intersecting with the spiral portion in a plane including the rotating shaft moves away from the rotating shaft.   The anodizing apparatus according to claim 2, further comprising a nozzle that ejects the processing liquid to a region of the spiral portion that intersects with the rotation axis. An anodizing apparatus main body for surface-treating the surface of the scroll by immersing the scroll used in the scroll compressor in the treatment liquid;
An anodizing apparatus provided with the nozzle which injects the said process liquid toward the outward direction opening formed in the outer side of the spiral part of the said scrolls. A cooling device for generating a cooling treatment liquid by cooling the treatment liquid;
The anodizing apparatus according to any one of claims 3 to 4, wherein the nozzle sprays the cooling treatment liquid onto the spiral portion. Surface-treating the surface of the scroll by immersing the scroll used in the scroll compressor in the treatment liquid;
An anodizing method comprising rotating the scroll around a rotation axis parallel to a central axis of a spiral portion of the scroll while the surface is surface-treated. Surface-treating the surface of the scroll by immersing the scroll used in the scroll compressor in the treatment liquid;
An anodizing method comprising spraying the treatment liquid toward an outward opening formed outside a spiral portion of the scroll while the surface is being surface treated.

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