KR101563847B1 - Eccentric Scroll Unit - Google Patents

Abstract

The present invention relates to a scroll unit comprising: a main body (10) including an accommodating groove (11) and a scroll lap (12) in the spiral form protruding in the accommodating groove (11), first, second, and third shaft installing grooves (13A, 13B, 13C) formed on a center of the accommodating groove (11), and first and second vent holes (H1, H2); a cover (20) to cover one lateral surface of the main body (10), including first, second, and third shaft installing grooves (21A, 21B, 21C) in a position corresponding to the first, second, and third shaft installing grooves (13A, 13B, 13C) respectively, and a main shaft through hole (21A′) passing through the first shaft installing groove (21A); a rotary scroll (30) installed in the accommodating groove (11), consisting of a scroll base (31) including first, second, and third shaft inserting holes (31A, 31B, 31C), and a scroll lap (32) extended in a spiral form in the scroll base (31); a main shaft (40) installed in the first shaft installing groove (13A) whose one end is supported by the main body (10) and an other end protruding outwards the cover (20); and a pair of auxiliary shafts (50A, 50B) installed in the second and third shaft installing grooves (13B, 13C) respectively, whose one end is supported by the main body (10), and the other end is supported by the cover (20). The main shaft (30) and a pair of auxiliary shafts (50A, 50B) are installed to be eccentric in a horizontal direction respectively. As such, the present invention has the effects of having a simple structure while maintaining structural integrity, and not disturbing a rotary direction of a rotary shaft.

Description

A scroll unit (Eccentric Scroll Unit)

The present invention relates to a scroll unit, and more particularly, to a scroll compressor or an expander which compresses or compresses a gas by a volume change of a closed space formed between a rotary scroll and a fixed scroll, To a scroll unit in which structural stability and operational stability are greatly improved.

Generally, a scroll unit (or a scroll device) such as a scroll compressor or a scroll expander has one rotating scroll and one fixed scroll inside the housing and compresses a gas such as gas or water vapor introduced into the housing through the inlet port The scroll unit rotates the rotary scroll provided between the fixed scroll and the fixed scroll, thereby causing a change in the volume of the crescent-shaped closed space formed between these scrolls, thereby causing suction and compression of the gas Or expansion) and the discharge stroke are simultaneously performed to compress (or expand) the gas introduced into the compressor (or inflator) and discharge the gas.

As described above, the scroll unit is advantageous in that the compression (or expansion) and the suction and discharge strokes are performed at substantially the same time, so that the load torque is small and noise and vibration are small. Further, Compared to reciprocating compressors, the number of parts is relatively small, making it possible to manufacture compact and lightweight.

However, in the conventional scroll unit, generally, a spiral-shaped rotary scroll having a plate-like plate attached to the scroll side is inserted into the spiral fixed scroll groove, and the volume between the fixed scroll and the rotary scroll is changed by the rotation of the rotary scroll The working fluid expanded or compressed during the compression (expansion) of the working fluid acts on the side plate of the rotary scroll formed in the disk shape, that is, the pressure of the working fluid in the axial direction of the rotary scroll and the fixed scroll The rotary scroll and the fixed scroll are subjected to a considerable force in a direction in which the rotary scroll and the fixed scroll are mutually stretched. Therefore, there is a problem that the rotary operation of the rotary scroll is not smoothly performed. To solve this problem, Such as a support bearing, And are not to be easily displaced in the direction along the structure it becomes complicated.

On the other hand, when arranging the rotary scroll and the fixed scroll in the scroll unit, one rotary shaft is arranged at the center of the rotary scroll so that the rotary scroll can rotate with respect to the fixed scroll, and one fixed scroll rotary shaft When two rotary shafts (main shafts and subordinate shafts) are arranged close to each other as described above, the adjacent driven shafts rotate in the same direction as one spindle rotates, and when the centers of the main shaft and the subordinate shafts coincide with the center of the crankshaft There is a possibility that the rotational direction of the driven shaft is often disturbed and the driven shaft is rotated in the reverse direction.

In order to solve such a problem, a scroll unit in which three rotary shafts are arranged in a triangular shape as in JP-A-1996-128395 has been proposed. However, in the scroll unit having such a structure, There is another problem that the rotary scroll or the fixed scroll is deformed due to the pressure of the working fluid in the rotary shaft so that the positional fluctuation occurs between the three rotary shafts, thereby causing no stable and uniform compression or expansion of the working fluid.

Therefore, it is required to develop a scroll unit in which the rotation direction of the rotation shaft is not disturbed and the structural stability is maintained, thereby improving the operational stability.

KR 10-0842301 B1 KR 10-0304483 B1 KR 10-0465543 B1 KR 10-0550777 B1 KR 10-0201206 B1

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the conventional scroll device, and it is an object of the present invention to provide a scroll device that can maintain the structural integrity with a simple structure, The object of the present invention is to provide a scroll unit.

The above and other objects can be accomplished by the provision of a scroll unit comprising: a receiving groove formed on a side surface; a helical scroll wrap protruding from the receiving groove; a first, second, A main body including first and second vent holes formed in both ends of the scroll wrap and formed in the receiving groove to allow the working fluid to flow in and out; First, second, and third shaft mounting grooves are formed at positions corresponding to the first, second, and third shaft mounting groove forming positions, respectively, covering the one side surface of the main body, and the main shaft through- A cover formed; A rotary scroll installed in the receiving groove and including a scroll base having first, second and third axial insertion holes formed therein and a scroll wrap extending in a spiral shape on the scroll base; A main shaft installed in the first shaft mounting groove and having one end supported by the main body and the other end protruding outside the cover through the first shaft mounting groove and the main shaft through hole; And a pair of auxiliary shafts which are respectively installed in the second and third shaft mounting grooves and one end is supported by the main body and the other ends are respectively provided in the second and third shaft mounting grooves and supported by the cover, Are provided so as to be eccentric to each other in the horizontal direction.

Further, the present invention is characterized in that the working fluid is introduced into the interior through the first vent hole and then discharged through the second vent hole.

Further, the present invention is characterized in that the working fluid is configured to be introduced into the interior through the second vent hole and then discharged through the first vent hole (H1).

In addition, according to the present invention, there is provided a spindle motor comprising: an insertion shaft having a main shaft formed with first and second surface contact portions at both ends thereof, inserted into a first shaft insertion hole and having opposite ends protruded outward; A first eccentric shaft having an insertion hole into which the first surface contact portion is inserted and an outer circumferential surface supported by the main body; And a second eccentric shaft having an insertion hole inserted into the second surface contact portion and protruding from the cover through the main shaft through hole.

Furthermore, according to the present invention, a pair of auxiliary shafts are provided with first and second surface contact portions at both ends thereof, inserted into second and third shaft insertion holes, and inserted at both ends thereof outwardly; A first eccentric shaft having an insertion hole into which a first surface contact portion is inserted and an outer circumferential surface thereof supported by the main body; And a second eccentric shaft which is supported by the cover and has an outer circumferential surface.

Another aspect of the present invention is that the imaginary centers of the first, second, and third axis mounting grooves are connected to each other to form an equilateral triangle or an isosceles triangle.

In the present invention, since the rotary scroll having a structure in which the plate is not provided on the side surface thereof is installed in the receiving groove and expands or compresses the working fluid by relative movement with the spiral scroll wrap, the working fluid is expanded or compressed So that it is necessary for the present invention to have a supporting means for firmly supporting the axial load acting on the plate of the rotary scroll as in the conventional scroll unit There is an advantage that the structure is simple.

Further, since the main shaft and the two sub-shafts are integrally provided in the block-shaped scroll base constituting the rotating scroll, the shape of the main shaft and the two sub-shafts are not easily deformed even if the pressure of the working fluid acts on the rotating scroll in the compression or expansion process, The rotation position of the main shaft and the pair of auxiliary shafts is maintained, and the rotary scroll is rotated more stably.

In addition, according to the present invention, the scroll base of the block-shaped rotary scroll having the main shaft and the sub-shaft integrally formed is arranged in a densely arranged shape adjacent to each other so as to form a triangle so that the case where the centers of these three rotation shafts are positioned on a straight line is excluded, Reverse rotation can be prevented.

1 is a perspective view showing an embodiment of a scroll unit according to the present invention,
FIG. 2 is an exploded perspective view of FIG. 1,
3 is a perspective view of a main body according to the present invention,
Fig. 4 is a front view of Fig. 3,
5 is a perspective view showing an example of a cover according to the present invention,
Fig. 6 is a front view of Fig. 5,
7 is a perspective view of the rotary scroll according to the present invention,
Fig. 8 is a front view of Fig. 7,
9 (a) and 9 (b) are a perspective view and an exploded perspective view showing an example of a main shaft according to the present invention,
Fig. 10 is a sectional view of Fig. 9 (a)
11 (a) and 11 (b) are a perspective view and an exploded perspective view showing an example of a sub shaft according to the present invention,
Fig. 12 is a sectional view of Fig. 11 (a)
13 is a sectional view taken along the line AA in Fig. 1,
14 is a sectional view taken along line BB of Fig. 1,
15 is a cross-sectional view taken along line CC of Fig. 1,
16 to 19 are use state diagrams showing examples of use of the scroll unit according to the present invention.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings showing preferred embodiments of the present invention.

The scroll unit according to the present invention includes a main body 10, a cover 20, a rotating scroll 30, a main shaft 40, and a main body 40, as shown in Figs. 1 and 2. And auxiliary shafts 50A and 50B. Hereinafter, each configuration will be described in detail.

The main body 10 can be a frame having a square box shape and provided on one side thereof with a rotary scroll 30 to be described later. A scroll wrap 12 formed in a helical shape protruding from the receiving groove 11 and first, second and third shaft mounting grooves 13A, 13B, 13C formed in the central portion of the receiving groove 11 And first and second vent holes H1 and H2 formed in the receiving groove 11 and positioned at both end portions of the scroll wrap 12 so that the first and second vent holes H1 and H2 are formed, A working fluid inlet pipe and a working fluid outlet pipe (not shown) are connected to allow the working fluid to selectively flow in or out, respectively.

A bearing BR1 for supporting one end of the main shaft 40 and the auxiliary shaft 50 is inserted into the first, second and third shaft mounting grooves 13A, 13B and 13C, Through holes 15 are formed in the through holes 15. The through holes 15 of the cover 20 and a through hole 22 of the cover 20 to be described later are provided with bolts B, The main body 10 and the cover 20 are tightly and tightly coupled to each other.

At this time, the three first, second and third axis mounting grooves 13A, 13B, and 13C are arranged so as to form a regular triangle or an isosceles triangle connecting virtual centers to each other, and these shaft mounting grooves 13A, 13B, (Main shaft, auxiliary shaft) are fixedly installed. By this structure, the rotary shaft and the rotary scroll 30 are more stably supported.

An O-ring mounting groove 14 is formed along one side of the main body 10 and an O-ring (not shown) is inserted into the O-ring mounting groove 14. Then, the main body 10 and the cover 20 are tightly adhered to each other so that the airtightness of the inside of the main body 10 is secured and the working fluid supplied to the receiving grooves 11 does not leak to the outside.

The cover 20 formed in a square shape corresponding to the size of the main body 10 so as to cover one side of the main body 10 in which the scroll wrap 12 protrudes inside the receiving groove 11, 2, and 3-axis mounting grooves 21A, 21B, and 21C are provided at positions facing each other with respect to the first, second, and third axis mounting grooves 13A, 13B, and 13C of the main body 10, .

The first shaft mounting groove 21A is formed with a main shaft through hole 21A 'passing through the cover 20 and one end of a main shaft 40 to be described later is connected to the cover 20 And one end of the main shaft 40 and the pair of auxiliary shafts 50A and 50B are rotatably mounted on the first, second and third shaft mounting grooves 21A, 21B and 21C, The bearing BR2 is inserted and installed.

The working fluid is compressed or expanded by a volume change caused by a relative movement with the helical scroll wrap 12 inserted into the receiving groove 11 formed in the main body 10 and protruding from the receiving groove 11, 7 and 8, the rotary scroll 30 includes an elliptical scroll base 31 provided inside the receiving groove 11, a spiral shape extending from one end of the scroll base 31 And a scroll wrap 32 of the scroll base 31. A supply port A is formed at one side of the scroll base 31 to supply and discharge the working fluid through the first vent hole H of the main body 10. [

The scroll base 31 is provided with a first, second, and third axis insertions 50a and 50b through which the main shaft 40 and the pair of auxiliary shafts 50A and 50B, both ends of which are supported by the main body 10 and the cover 20, The bearings BR3 and B4 are provided at both ends of the first, second and third shaft insertion holes 31A, 31B and 31C, And the pair of auxiliary shafts 50A and 50B are commonly provided in one scroll base 31 and are supported by bearings BR3 and BR4 in the first, second, and third axis insertion holes 31A, 31B, and 31C ).

In the rotary scroll 30, the scroll base 31 is formed as an integral elliptical block. Even if the pressure of the working fluid acts on the rotary scroll 30 during the compression or expansion process, the shape of the rotary scroll 30 is not easily deformed Therefore, the rotating scroll 30 is rotated more stably while the initial installation position of the main shaft 40 and the pair of auxiliary shafts 50A and 50B is maintained.

As described above, the scroll base (31) of the block-shaped rotary scroll (30) having the main shaft (40) and the auxiliary shafts (50A, 50B) It is possible to prevent the reverse rotation of the auxiliary shaft by preventing the center of the rotary shaft from being located on a straight line, and the gap between the three rotary shafts is firmly maintained, thereby greatly improving structural stability and operational stability.

The main shaft 40 provided between the main body 10 and the cover 20 is provided in the plurality of bearings BR1, BR2, BR3, and BR4 while being inserted through the first shaft insertion hole 31A formed in the rotary scroll 30 And one end of the main shaft 40 is installed so as to protrude outwardly through the main shaft through hole 21A 'of the cover 20, and the protruded main shaft 40 is provided with a generator (Not shown) or a motor (not shown).

As shown in Figs. 9 (a), (b), 10, and 13, the main shaft 40 having the above structure has planar first and second surface contact portions 41A and 41B are formed and inserted into the first shaft insertion hole 31A and then both ends are respectively projected to both side surfaces of the rotary scroll 30 and a first surface contact portion 41A is formed therein, The outer circumferential surface of which is formed with a first eccentric shaft 42 supported by the main body 10 and an insertion hole 43A through which the second surface contact portion 41B is inserted The second eccentric shaft 43 is connected to the first eccentric shaft 42 and the second eccentric shaft 43 is connected to the first eccentric shaft 42. [ As shown in FIG.

The first and second contact portions 41A and 41B formed on the insertion shaft 41 are formed in a planar shape as described above so that the cross section of the insertion shaft 41 has a half- The insertion holes 42A and 43A are formed so as to have a half-moon shape by being inserted into the first and second eccentric shafts 42 and 43, respectively, 43 rotate integrally.

The center line of the insertion shaft 41 of the main shaft 40 and the center line of the first and second eccentric shafts 42 and 43 do not coincide with each other in the horizontal direction but are configured to be eccentric with respect to each other The insertion shaft 41 rotates eccentrically and the rotary scroll 30 rotates together when the main shaft 40 rotates about the center line of the first and second eccentric shafts 42 and 43 on both sides.

A pair of auxiliary shafts 50A and 50B supported at both ends of the main body 10 and the cover 20 by being inserted through the second and third shaft insertion holes 31B and 31C of the rotary scroll 30, As shown in Figs. 12 (a) and 12 (b), the first and second side contact portions 51A and 51B are formed at both ends of the first and second side contact portions 51A and 51B, And an insertion hole 52A through which the first surface contact portion 51A is inserted is formed in the insertion shaft 51. The outer circumferential surface of the insertion shaft 52A is connected to the first eccentric shaft 51A supported by the main body 10, And a second eccentric shaft 53 which is supported by the cover 20 on the outer circumferential surface thereof while an insertion hole 52A inserted into the second surface contact portion 51B is formed therein.

The first and second side contact portions 51A and 51B of the insertion shaft 51 also have a planar shape of a constant width by the same planar cutting process as that of the insertion shaft 41 of the main shaft 40, And the insertion holes 52A and 53A are formed to have a half-moon shape. By this structure, the insertion holes 51A and 51B are formed by the insertion shaft 51 and the first and second The eccentric shafts 52 and 53 rotate integrally.

The pair of auxiliary shafts 50A and 50B rotate relative to the main body 10 when the rotary scroll 30 rotates along the main shaft 40 and moves along the scroll wrap 12 formed on the main body 10, The operation of the scroll 30 is guided, and as a result, an accurate rotation operation of the rotary scroll 30 is performed.

In the scroll unit of the present invention having the above structure, the working fluid inlet pipe is connected to the first vent hole H1 and the working fluid outlet pipe is connected to the second vent hole H2, Is used as an inflator that is configured to be introduced into the receiving groove 11 through the first vent hole H1 and then discharged through the second vent hole H2 to expand the working fluid, The working fluid is connected to the pores H2 and the working fluid discharge pipe is connected to the first vent hole H1 so that the working fluid flows into the main body 10 through the second vent hole H2, The scroll unit of the present invention can be used as a compressor which is compressed and discharged through the first vent hole H1. Hereinafter, the operation of using the scroll unit of the present invention as an inflator and the operation of using the compressor as a compressor will be briefly described.

When the scroll unit of the present invention is used as an inflator, a gear, a belt pulley or a generator is installed on the main shaft 40, and then a working fluid having pressure through the first vent hole H1 as shown in Figs. The volume of the crescent-shaped closed space formed by the scroll wrap 12 and the rotary scroll 30 becomes larger than the volume of the closed space formed by the scroll wrap 12 and the rotary scroll 30 when the expansion force for inflating the working fluid flows into the center portion of the main body 10, So that the working fluid gradually moves to the outer portion of the rotary scroll 30 and is discharged to the outside through the second vent hole H2.

When the above operation is repeated continuously, the main shaft 40 is continuously rotated and operated by the expansion force of the working fluid, so that the power is generated. Thus, the rotation power is directly used through the gear or the belt pulley installed on the main shaft 40 Or the generator installed on the main shaft 40 is driven to produce electric energy.

Next, when the scroll unit according to the present invention is used as a compressor, while moving in the opposite direction to the above-described inflator, that is, in the direction opposite to the rotation direction in Figs. 16 to 19, The main shaft 40 and the main shaft 40 are rotated. At this time, a driving motor (not shown) is installed on the main shaft 40, whereby the rotating scroll 30 is rotated by the motor.

When the working fluid introduced through the second vent hole H2 is supplied to the space between the main body 10 and the cover 20, the volume of the closed space due to the rotational movement of the rotating scroll 30 is reduced, The working fluid introduced into the first vent hole H1 formed at the middle portion is discharged.

As described above, according to the present invention, since the three rotary shafts are densely arranged on the scroll base formed at the center of the rotary scroll, the shape of the rotary shroud is not easily deformed even if the pressure of the working fluid acts on the rotary scroll in the compression or expansion process And the generation of reverse rotation of the sub-shaft is fundamentally prevented, thereby greatly improving the structural stability and the operation stability of the scroll unit.

10: main body 11: receiving groove
12: scroll wrap 13A: first shaft mounting groove
13B: second shaft mounting groove 13C: third shaft mounting groove
14: O ring installation groove 15: Through hole
20: cover 21A: first shaft mounting groove
21A ': Spindle through hole 21B: Second shaft mounting groove
21C: Third shaft mounting groove 22: Through hole
30: rotary scroll 31: scroll base
31A: first shaft insertion hole 31B: second shaft insertion hole
31C: 3rd shaft insertion hole 32: scroll wrap
40: main shaft 41: insertion shaft
41A: first surface contact portion 41B: second surface contact portion
42: first eccentric shaft 42A: insertion hole
43: second eccentric shaft 43A: insertion hole
50A, 50B: auxiliary shaft 51: insertion shaft
51A: first surface contact portion 51B: second surface contact portion
52: first eccentric shaft 52A: insertion hole
53: second eccentric shaft 53A: insertion hole
A: Exhaust port B: Bolt
BR1, BR2, BR3, BR4: Bearing H1: First cylinder
H2: Second vent hole N: Nut

Claims (6)

A spiral scroll wrap 12 protruding from the receiving groove 11 and a first and second and a third axial mounting grooves 11 and 12 formed at the center of the receiving groove 11, And first and second vent holes (H1, H2) formed in the receiving groove (11) and positioned at both end portions of the scroll wrap (12) to allow the working fluid to flow in and out, A body 10;
The first, second, and third shaft mounting grooves 21A and 21B are formed at positions corresponding to the positions where the first, second, and third shaft mounting grooves 13A, 13B, and 13C are formed, 21B, and 21C, and a main shaft through hole 21A 'passing through the first shaft mounting groove 21A is formed;
A scroll base 31 provided in the receiving groove 11 and provided with first, second and third shaft insertion holes 31A, 31B and 31C and a scroll wrap 31 extending in a spiral shape on the scroll base 31 32;
One end of which is supported by the main body 10 and the other end of which passes through the first shaft installation groove 21A and the main shaft through hole 21A ' A main shaft 40 projecting outwardly of the main shaft 40;
One end of each of which is supported by the main body 10 and the other end of which is provided in each of the second and third shaft mounting grooves 21B and 21C, And a pair of auxiliary shafts (50A, 50B) supported by the main shaft (20)
The main shaft (40) and the pair of auxiliary shafts (50A, 50B) are installed to be eccentric to each other in the horizontal direction,
The main shaft 40 is formed with first and second side contact portions 41A and 41B at both ends thereof. The main shaft 40 has an insertion shaft 41 inserted into the first shaft insertion hole 31A and having both ends protruded outwardly; A first eccentric shaft 42 having an insertion hole 42A through which the first surface contact portion 41A is inserted and an outer circumferential surface supported by the main body 10; And a second eccentric shaft 43 protruding from the cover 20 through the main shaft through hole 21A 'while forming an insertion hole 43A to be inserted into the second surface contact portion 41B, Of the scroll unit.
The method according to claim 1,
A working fluid inlet pipe is installed in the first vent hole H1 and a working fluid outlet pipe is installed in the second vent hole H2 so that the working fluid flows into the first vent hole H1 , And is discharged through the second vent hole (H2).
The method according to claim 1,
A working fluid inlet pipe is installed in the second vent hole H2 and a working fluid discharge pipe is provided in the first vent hole H1 so that the working fluid flows into the second vent hole H2 through the second vent hole H2 And then discharged through the first vent hole (H1).
delete The method according to any one of claims 1 to 3,
The first and second side contact portions 51A and 51B are formed at both ends of the pair of auxiliary shafts 50A and 50B and inserted into the second and third shaft insertion holes 31B and 31C, An insertion shaft 51 protruding;
A first eccentric shaft 52 having an insertion hole 52A through which the first surface contact portion 51A is inserted and an outer circumferential surface supported by the main body 10;
Wherein an insertion hole (52A) is formed in the second surface contact portion (51B) and a second eccentric shaft (53) is supported by the cover (20).
The method according to claim 1,
Wherein the first, second, and third shaft mounting grooves (21A, 21B, 21C) are arranged to form a regular triangle or an isosceles triangle when virtual centers are connected to each other.

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