JP4002651B2 - Scroll compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The scroll compressor, more specifically, the load in the thrust direction of the scroll is received evenly and reliably, and the gap between the laps and the gap between the wrap end faces are made uniform, and the shim is connected to the end face of the casing and the outward pressing part of the bearing box. The present invention relates to a scroll compressor that can easily adjust a gap between wrap end faces by being interposed between the two.
[0002]
[Prior art]
Conventionally, as a scroll compressor of this type, various inventions and devices have been made as in Japanese Patent No. 2599626 and Japanese Patent No. 2565281. In these scroll compressors, the former is provided with a pressing spring plate on the bearing of the anti-rotation crank, pushes the outer ring of the bearing, and adjusts the gap between the lap end faces. In the latter, the rotation prevention crank itself is threaded, the inner ring stopper of the bearing on the fixed scroll side is a double nut mechanism, and the clearance of the lap end surface is adjusted by adjusting the tightening of the nut.
Therefore, in any of the above, the gaps between the laps and the lap end faces are not uniform unless the three rotation preventing cranks are tightened equally.
Further, since the adjustment is performed by pushing the inner and outer rings of the bearings, the thrust load cannot be reliably received by the bearings of the pin crank unless the three bearings are pushed evenly.
[0003]
In addition, as disclosed in Japanese Patent Publication No. 6-17673, a movable race and a movable ring provided on the orbiting scroll, a fixed race and a fixed ring provided on the front end plate side, and a corresponding pocket provided on the movable ring and the fixed ring. The ball element held in the ring prevents rotation of the orbiting scroll, which also serves as the thrust bearing of the orbiting scroll, makes it possible to adjust the axial position of the fixed race with respect to the fixed ring, and adjusts the meshing between the orbiting scroll and the fixed scroll. This is to adjust the thickness of the shim sandwiched between the cylindrical casing, but it will certainly improve the yield of the fixed ring, movable ring, and ball element, but the orbiting scroll is provided with a sliding surface, so it can be rotated at high speed. Is difficult to apply and its structure is complex.
Therefore, a pin crank that prevents the rotation of the orbiting scroll, an orbiting scroll side bearing that supports one side shaft portion of the pin crank that is fixed to the orbiting scroll, and the other side shaft portion that is fixed to the casing and is supported by the casing. In a scroll compressor equipped with a casing-side bearing, a bearing box configured to be slidable in the axial direction of the casing is provided, and the casing-side bearing is fitted or fastened in this bearing box so as not to rattle. In addition, a thrust load is achieved by fitting or fastening the other side shaft portion of the pin crank to the inner ring of the casing side bearing so as not to rattle, and enabling the bearing box to be positioned with respect to the axial direction of the casing. Can be reliably received and the accuracy of the perpendicularity of the scroll can be reliably and easily output. Since the gap between the laps and the gap between the wrap end faces can be accurately produced, there is no variation in performance and it is easy to assemble, and a shim is interposed between the end face of the casing and the outward pressing part of the bearing box. It has been found that the gap between the wrap end faces can be easily adjusted and can be applied to high-speed rotation of the scroll.
[0004]
[Problems to be solved by the invention]
Therefore, firstly, the thrust load can be received evenly and reliably, the accuracy of the perpendicularity of the scroll can be reliably and easily taken out, and the gap between the laps and the gap between the lap end faces are made uniform to compress. To provide a scroll compressor capable of improving efficiency.
Second and third, in addition to the first problem, by making a hole in the end face of the casing and fitting the bearing box, the mounting of the bearing box can be easily and reliably performed. A scroll compressor that enables rotation of the scroll at a high speed and prevents fretting at the time of swinging rotation, and allows the pin crank and the orbiting scroll to move according to the sliding of the bearing box. To provide.
Fourthly, in addition to any one of the first to third problems, the bearing box is provided with an inward flange on one end side in the axial direction of the box, an outward pressing part on the other end side, and other axial directions. Consists of a lid that contacts the outer ring of the bearing on the end side, a shim is interposed between the end surface of the casing and the outward pressing portion of the box, and the box and the lid are fastened to the casing The mounting of the bearing box can be made easier and more reliable, the accuracy of the end face of the casing only needs to be obtained, and the perpendicularity of the bearing box is also out, and the thrust bearing is more reliable with the positioned bearing Scroll compressor that can be received by the machine and is positioned so that the three rotation prevention cranks can be tightened evenly, and the gap between the laps and the gap between the wrap end faces can be easily, quickly, and uniformly made by anyone. Provide It.
Fifth and sixth, in addition to the fourth problem, the holding part of the box, the lid and the shim are fastened together with the casing, and the shim can be divided, thereby making it easier to scroll. To provide a scroll compressor capable of adjusting a gap of a lap end surface and easily changing shims without loosening tightening without removing a bearing box from a casing.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention firstly, a fixed scroll fixed to a casing, a turning scroll that meshes with the fixed scroll and eccentrically turns with respect to the center of the drive shaft, and pink that prevents the turning of the turning scroll. A scroll compressor comprising a rank, a orbiting scroll side bearing that supports one side shaft portion of the pin crank fixed to the orbiting scroll, and a casing side bearing that is fixed to the casing and supports the other side shaft portion of the pin crank. In the above, there are provided three pin cranks, orbiting scroll side bearings and casing side bearings, and a bearing box is provided corresponding to the casing side bearings so as to be slidable in the axial direction of the casing. Fit or fasten the bearing on the casing side so that there is no rattling Both the casing-side bearing inner ring fitted or fastened so that there is no looseness of the other side shaft portion of the pin crank in, and positionable configure each of the bearing boxes with respect to the axial direction of the casing, the fixed A scroll compressor characterized in that a gap between laps and a gap between wrap end surfaces of a scroll and a turning scroll can be adjusted . Second, the scroll compressor according to claim 1, wherein a hole matching the outer shape of the bearing box is formed in an end face of the casing, and the bearing box is fitted into the hole. 3rdly, the double row angular bearing is accommodated in the said bearing box, The scroll compressor of Claim 1 or Claim 2 characterized by the above-mentioned. Fourth, the bearing box has a box body having an inward flange on one end side in the axial direction and an outward pressing part on the other end side in the axial direction, and the bearing box on the other end side in the axial direction. And a lid that contacts the outer ring, wherein a shim is interposed between the end face of the casing and the outward pressing portion of the box, and the box and the lid are fastened to the casing. The scroll compressor according to any one of claims 1 to 3. Fifth, the scroll compressor according to claim 4, wherein the pressing portion, the lid, and the shim of the box are fastened together with the casing. Sixth, the scroll compressor according to claim 5, wherein the shim is configured to be divided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the horizontal scroll compressor of the present invention will be described based on the embodiment of FIGS. As shown in FIG. 1, a fixed scroll 1 is formed by vertically setting a spiral wrap 11 on one side of a disk-shaped substrate 10. The substrate 10 of the fixed scroll 1 is fixed to the casing 3 with a bolt 12 or the like at one side substantially perpendicular to the casing 3 of the compressor body. A spiral wrap 14 that meshes with the wrap 11 of the fixed scroll 1 is formed on one side of the substrate 13 of the orbiting scroll 2. As shown in FIG. 1, a cylindrical bearing cylinder 15 having the same center as that of the orbiting scroll is protruded on the other side of the substrate 13, and three bearing bosses 16 a to 16 c are provided in the outer peripheral direction of the bearing cylinder 15. The bearing cylinder 15 and the bearing bosses 16 a to 16 c are integrally formed on the orbiting scroll substrate 13 so as to form a substantially equilateral triangle having a corner as an apex. Further, as shown in FIGS. 1 and 2, a boss hole 17 is formed in the bearing bosses 16a to 16c in parallel with the bearing cylinder 15, and the orbiting scroll side bearing 18 of the pin crank 5 is provided in the boss hole 17. Is inserted into the bearing boss 16 (ac) with a screw 29, and the inner and outer sides of the orbiting scroll side bearing 18 are secured. By holding the ring, one end of the pin crank 5 having the same eccentric dimension e as the crankshaft is supported, and the other end of the pin crank is preferably a casing fitted in a bearing hole 19 formed in the box 4 of the bearing box. It is supported by side bearings 6. As described above, the scroll compressor according to the present invention includes the rotation prevention mechanism by the pin crank 5. The box 4 of the bearing box that houses the casing side bearing 6 that supports the other end of the bin crank 5 of the rotation prevention mechanism is configured to be slidable in the axial direction of the casing, and preferably has a cylindrical shape. An inward flange 20 for positioning and fixing the caging-side bearing 6 is provided on one end side in the direction, and an outward pressing portion 21 for fixing to the casing 3 is provided on the other end side in the axial direction. Preferably, the end face of the casing is provided with a hole 42 that matches the outer shape of the box 4 of the bearing box, and by making the bearing a double-row angular bearing, the scroll can be rotated at high speed and at the time of swinging rotation. The pin crank 5 and the orbiting scroll 2 can be moved so that the inner ring and the outer ring of the bearing 6 are not detached by sliding of the bearing box.
[0007]
In the above embodiment, the box 42 of the bearing box that houses the casing-side bearing 6 fixed to the casing 3 is provided with a hole 42 in the casing 3, but this is not shown, but the casing side is attached to a separate frame. A support portion for supporting the bearing 6 may be formed and held, and the casing side bearing 6 is fitted so as not to rattle the bearing hole 19 of the box body 4 of the bearing box. The outer ring may be fastened to the casing 3 with a bolt 22 by the lid 8 of the bearing box. Further, the other side shaft portion of the pin crank 5 is fitted to the bearing 6, and a holding plate 36 is fastened to the end surface of the pin crank 5 with a bolt 37 so that the inner ring of the bearing 6 does not move in the axial direction. At this time, the fitting between the inner ring of the bearing 6 and the pin crank 5 is a clearance fit or an intermediate fit, but the presser plate 36 fastened to the end face of the pin crank 5 may be eliminated as an interference fit.
[0008]
Then, the end surface of the inner ring of the casing side bearer 6 is positioned by contacting the large diameter portion 5 ′ of the pin crank 5 or the stepped portion of the large diameter portion 5 ′, and is fixed at the large diameter portion 5 ′. The box 4 of the bearing box in which the one end is inserted into the inward flange 20 through the seal 30 has a slight gap between the hole 42 drilled in the casing 3 and the box 4 of the bearing box. Furthermore, an annular or other shim 7 (which may be in an arbitrary shape) is interposed between the casing 3 and the pressing portion 21 of the box 4 of the bearing box, and an arbitrary shape as indicated by a virtual line in a part of FIG. The lid 8 of the bearing box is bolted to the casing 3 with the bolts 22 so that the lid 8 holds the outer ring of the bearing 6 on the casing side and also fixes the shim 7 and the holding portion 21 of the box 4 of the bearing box. Thrust The load of the direction it is possible to reliably receive. The clearance of the wrap end surface of the scroll can be easily adjusted by tightening the holding portion 21 of the box 4, the lid 8 and the shim 7 together with the casing, and a clearance gauge is inserted through the observation hole 38, The clearance with the outer periphery 44 of the orbiting scroll 2 is measured, and if the clearance adjustment of the lap end surface is the reference dimension, the assembly is completed. If the clearance is outside the reference dimension, the bolt 22 is loosened to remove the shim 7, and the clearance The shim 7 selected according to the dimensions (in the calculation, a shim having a thickness such that the clearance between the outer periphery of the orbiting scroll 2 and the outer periphery of the fixed scroll 1 is an appropriate dimension) is between the pressing portion 21 of the box 4 and the end surface of the casing 3. The bolt 22 is tightened. Furthermore, as another embodiment, as shown in FIG. 3, the shim 7 is divided into two parts, so that each shim can be removed without loosening the bolt 22 and removing the bearing box from the casing. But anyone can easily, quickly and reliably.
In addition, by providing a lid stopper (not shown) in the peep hole 38, the lubricating oil does not leak even in a mold in which the lubricating oil is supplied between the laps. The peep holes 38 are located in the vicinity of the pin cranks 5. If it is provided, it is possible to measure the gap more accurately.
[0009]
In this way, the shim 7 is sandwiched between the holding portion 21 of the bearing box box 4 and the end face 23 of the casing 3 so that the squareness of the box 4 of the bearing box can be easily obtained. Since the perpendicularity of the orbiting scroll 2 connected through the bearings 4 can be obtained and the perpendicularity of the bearing box 4 is obtained, the thrust direction load of the orbiting scroll 2 is equally and reliably ensured by the three casing side bearings 6. As well as being received, the gap between the wraps and the gap between the wrap end surfaces of the fixed scroll 1 and the orbiting scroll 2 become uniform, and the compression efficiency is improved. Further, a bearing 24 is fitted into the bearing cylinder 15 of the orbiting scroll 2, and one end of the crankshaft 25 'is supported. The center of the orbiting scroll 2 is eccentrically engaged with the center of the fixed scroll 1. Therefore, the center of the orbiting scroll 2 revolves with the eccentric dimension (e) of the crankshaft as the radius with respect to the center of the fixed scroll 1.
Reference numeral 26 is a cooling fin provided on the back side of the fixed scroll 1, reference numeral 27 is a cooling fin provided on the back side of the orbiting scroll 2, and reference numeral 28 is a fan attached to the side surface of the pulley 41, Reference numeral 31 is a balance weight provided on the crankshaft 25 ′, reference numeral 32 is a suction port, reference numeral 33 is a discharge port, reference numerals 34 and 35 are bearings for supporting the drive shaft 25, and the outer ring of the bearing 34 is pressed against the outer ring. The plate 39 is brought into contact with the casing 3 and fastened with bolts 40.
[0010]
The assembly procedure of the scroll compressor of the present invention configured as described above will be described.
(1) The casing side bearing or the double row angular bearing 6 is accommodated in the bearing box.
(2) The other side shaft portion of the pin crank 5 is fitted to the inner ring of the bearing 6, and a holding plate 36 is fastened to the end surface of the pin crank 5 with bolts so that the inner ring of the bearing 6 does not move in the axial direction. At this time, the fitting between the inner ring of the bearing 6 and the pin crank 5 is a clearance fit or an intermediate fit, but the presser plate 36 fastened to the end face of the pin crank 5 may be eliminated as an interference fit.
(3) The box body 4 of the bearing box is fitted into the hole 42 formed in the end surface 23 of the casing 3.
(4) Between the holding portion 21 of the box 4 and the end face 23 of the casing 3, a shim 7 having a reference dimension (calculated that the gap between the outer periphery 44 of the orbiting scroll 2 and the outer periphery 43 of the fixed scroll 1 is an appropriate size) A cover 8 of the bearing box is brought into contact with the outer ring of the bearing 6 and is fastened to the casing 3 with bolts 22.
(5) The bearing 18 is previously installed in the bearing boss 16 (ac) of the orbiting scroll 2, the outer ring of the bearing 18 and the pressing plate 9 are brought into contact with each other, and the pressing plate 9 is attached to the bearing boss 16 with bolts 29. Conclude. (3 locations for pin crank)
Further, the bearing 24 is fitted into the bearing cylinder 15 of the orbiting scroll 2.
(6) The bearings 34 and 35 are assembled in the casing, and the drive shaft 25 is fitted into the inner rings of the bearings 34 and 35 from one side of the casing to the other side.
(7) The inner rings of the bearings 18 and 24 fixed to the orbiting scroll 2 are fitted to one side shaft portion of the pink rank 5 and the crankshaft 25 ′ of the drive shaft 25.
(8) The orbiting scroll 2 and the fixed scroll 1 are engaged with each other, and the fixed scroll 1 is fastened to the casing 3 with bolts 12.
{Circle around (9)} A gap gauge is inserted through the observation hole 38 and the gap between the outer periphery 43 of the fixed scroll 1 and the outer periphery 44 of the orbiting scroll 2 is measured.
If the observation hole 38 is provided in the vicinity of each pin crank 5 at this time, it is possible to measure the gap more accurately.
(10) If the gap dimension is the reference dimension, the assembly is completed, but if it is outside the reference dimension, the bolt 22 is loosened to remove the shim 7, and the shim 7 selected by the gap dimension is attached to the box 4 It clamps between the holding | suppressing part 21 and the end surface of the casing 3, and the volt | bolt 22 is tightened.
Alternatively, since the shim 7 is configured to be separable, the shim can be replaced without loosening the bolt 22 and removing the bearing box from the casing 3.
[0011]
Next, the operation and main action will be described. When a motor (not shown) is rotated, the rotation is transmitted from the drive shaft 25 to the orbiting scroll 2 via the crank shaft 25 '. 5, a relative circular motion is performed with respect to the fixed scroll 1, and the gas sucked from the suction port 32 is compressed to a predetermined pressure and discharged from the central discharge port 33. Further, as shown in FIG. 4, in order to make the gaps (f) between the wraps 11 and 14 and the gaps (d) between the wraps 11 and 14 between the fixed scroll 1 and the orbiting scroll 2 uniform, The right angle of the bearing box 4 and the right angle of the orbiting scroll 2 connected via the pin crank 5 may be obtained by sandwiching the shim 7 between the pressing portion 21 of the four and the end face 23 of the casing. By doing so, the load in the thrust direction can be received evenly and reliably by the three casing side bearings 6, and the gaps between the wraps 11, 14 between the fixed scroll 1 and the orbiting scroll 2, wraps The compression efficiency is also improved by the uniform clearance between the end faces 11 and 14. Furthermore, anyone can easily adjust the gap between the end faces of the wraps 11 and 14 by changing the thickness of the shim.
In addition, although the air compressor was demonstrated in the said Example, this invention is a wide concept including compression of refrigerant | coolants, such as a refrigerator. Further, the present invention can be applied to any of a horizontal type, a vertical type, an oil-free type, a type that supplies lubricating oil between laps of a fixed scroll and a turning scroll, and the like.
[0012]
【The invention's effect】
First, the thrust load can be received evenly and reliably, the accuracy of the perpendicularity of the scroll can be reliably and easily taken out, the gap between the laps can be made uniform, and the compression efficiency can be improved, This is a scroll compressor that eliminates variations in performance. Second and third, in addition to the first effect, by making a hole in the end face of the casing and fitting the bearing box, the mounting of the bearing box can be performed easily and reliably. A scroll compressor that enables rotation of the scroll at a high speed and prevents fretting at the time of swinging rotation, and allows the pin crank and the orbiting scroll to move according to the sliding of the bearing box. It is.
Fourth, in addition to any one of the first to third effects, the bearing box is provided with an inward flange on one end side in the axial direction of the box, an outward pressing part on the other end side, and other axial directions. Consists of a lid that contacts the outer ring of the bearing on the end side, a shim is interposed between the end surface of the casing and the outward pressing portion of the box, and the box and the lid are fastened to the casing The mounting of the bearing box can be made easier and more reliable, the accuracy of the end face of the casing only needs to be obtained, and the perpendicularity of the bearing box is also out, and the thrust bearing is more reliable with the positioned bearing Scroll compressor that can be received by the machine and is positioned so that the three rotation prevention cranks can be tightened evenly, and the gap between the laps and the gap between the wrap end faces can be easily, quickly, and uniformly made by anyone. It is.
Fifth and sixth, in addition to the fourth effect, the box holding part, lid and shim can be fastened together with the casing, and the shim can be divided to easily wrap the scroll. It is a scroll compressor that can adjust the gap of the end face and can easily and quickly and accurately change the shim to anyone without removing the bearing box from the casing by loosening the tightening.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a scroll compressor of the present invention.
FIG. 2 is an enlarged view of a main part A of FIG. 1 according to the present invention.
3 is a front view of the essential part of the cross section taken along line BB of FIG. 1 of the present invention. FIG.
FIG. 4 is an explanatory diagram of a scroll gap of the scroll compressor according to the present invention.
[Explanation of symbols]
1 Fixed Scroll 2 Orbiting Scroll 3 Casing 4 Bearing Box Box 5 Pink Rank 6 Casing Side Bearing (Double Row Angular Bearing)
7 Shim 8 Bearing Box Cover 9, 36 Presser Plate 10, 13 Substrate 11, 14 Lap 12, 22, 29 Bolt and Screw 15 Bearing Cylinder 16 (ac) Bearing Boss 17 Boss Hole 18 Orbiting Scroll Side Bearing 19 Bearing Hole 20 鍔 21 Presser 23 End face 24, 34, 35 Bearing 25 Drive shaft 25 ′ Crankshaft 26, 27 Fin 28 Fan 30, 30 ′ Seal 31 Balance weight 32 Suction port 33 Discharge port 37, 40 Bolt 38 Peep hole 41 Pulley 42 Hole 43 Fixed scroll outer periphery 44 Orbiting scroll outer periphery d Wrap 11, 14 end face clearance e Crankshaft eccentricity f Clearance between lap 11, 14

Claims (6)

A fixed scroll that is fixed to the casing, a turning scroll that meshes with the fixed scroll and rotates eccentrically with respect to the center of the drive shaft, a pin crank that prevents rotation of the turning scroll, and one side of the pin crank that is fixed to the turning scroll In a scroll compressor comprising a orbiting scroll side bearing that supports the shaft portion and a casing side bearing that is fixed to the casing and supports the other side shaft portion of the pin crank,
Three pin cranks, orbiting scroll side bearings, and casing side bearings are provided, and a bearing box configured to be slidable in the axial direction of the casing is provided corresponding to the casing side bearings. with rattling casing-side bearing is fitted or fastened as no inner ring fitted or fastened so that there is no looseness of the other side shaft portion of the pin crank of the casing-side bearing each of the bearing A scroll compressor characterized in that the box can be positioned with respect to the axial direction of the casing, and the gap between the wrap and the gap between the end faces of the fixed scroll and the orbiting scroll can be adjusted .   The scroll compressor according to claim 1, wherein a hole matching the outer shape of the bearing box is formed in an end surface of the casing, and the bearing box is fitted into the hole.   The scroll compressor according to claim 1 or 2, wherein a double-row angular bearing is housed in the bearing box.   The bearing box is in contact with the outer ring of the bearing on the other end side in the axial direction, with a box body having an inward flange on one end side in the axial direction and an outward pressing portion on the other end side in the axial direction. A lid is formed, and a shim is interposed between an end face of the casing and an outward pressing portion of the box, and the box and the lid are fastened to the casing. Item 4. The scroll compressor according to any one of item 3.   The scroll compressor according to claim 4, wherein the pressing portion, the lid, and the shim of the box are fastened together with the casing.   The scroll compressor according to claim 5, wherein the shim is configured to be divided.

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