Cooling water supply system for water-cooled scroll compressor

Abstract

The present invention provides a cooling water supply device for a water-cooled scroll compressor that can prevent damage to the fitting pipes and cooling water hoses by providing a fitting structure that prevents the cooling water hoses connected to the cooling water supply and discharge fitting pipes of the orbiting scroll from moving together in accordance with the orbiting motion of the orbiting scroll and the fitting pipes. The cooling water supply device for a water-cooled scroll compressor according to the present invention has a configuration in which an orbiting absorption mechanism 100 corresponding to the inlet fitting pipe 32 and the outlet fitting pipe 34 is provided on the outside of the housing 10. The orbiting absorption mechanism 100 includes a crank pipe 300 having an eccentric shaft 320 having an axis X4 that is eccentric by an eccentricity Y1 of the orbiting scroll 30 relative to the fixed scroll 20 with respect to the rotation axis X3 of the rotation central axis 310. The inlet fitting pipe 32 or the outlet fitting pipe 24 is connected to the eccentric shaft 320 of the crank pipe 300, and a connecting pipe 200 for connecting a cooling water hose is provided on the opposite side.

Description

Technical Field

[0001] The present invention relates to a cooling water supply device for a water-cooled scroll compressor. More specifically, the present invention provides a fitting structure capable of preventing a cooling water hose connected to a cooling water supply and discharge fitting pipe for a swash scroll from moving together in response to the swiveling motion of the swash scroll and the fitting pipe, thereby preventing damage to the fitting pipe and the cooling water hose. The present invention relates to a cooling water supply device for a water-cooled scroll compressor.

Background Art

[0002] Generally, a scroll compressor includes a fixed scroll fixed to a housing, a swash scroll whose center engaging with the fixed scroll is eccentric with the center of an input shaft, and the swash scroll rotates eccentrically to suck and compress air, a motor for driving the input shaft of the swash scroll, and a cooling device for cooling the motor and the scroll.

[0003] Therefore, by driving the swash scroll to rotate eccentrically with respect to the fixed scroll fixed to the housing, the volume of the compression chamber between the fixed scroll and the swash scroll is gradually reduced while sucking the air to compress it, and the compressed air is discharged from a discharge port formed at the center of the fixed scroll.

[0004] FIG. 1 shows a cross-sectional view of a conventional water-cooled scroll compressor.

[0005] Referring to FIG. 1, the scroll compressor includes a housing 10, a fixed scroll 20 coupled to an end of the housing 10, a swash scroll 30 housed in the housing 10 and engaged with the fixed scroll 20, and a crankshaft 40 for swiveling the swash scroll 30. The crankshaft 40 is rotated by a drive source such as a motor (not shown).

[0006] The crankshaft 40 is equipped with an eccentric shaft 42 having an axis X2 that is offset by an eccentricity Y1 with respect to its rotation axis X1, and the eccentric shaft 42 is rotatably coupled to the orbital scroll 30 via a bearing 50.

[0007] The fixed scroll 20 and the orbiting scroll 30 have spiral (involute) wraps 20a and 30a, and the wrap 30a of the orbiting scroll 30 engages with the wrap 20a of the fixed scroll 20 with a phase difference of 180°, thereby forming multiple crescent-shaped compression spaces between the wrap 20a of the fixed scroll 20 and the wrap 30a of the orbiting scroll 30.

[0008] Therefore, the rotation of the crankshaft 40 causes its eccentric shaft 42 to rotate the orbiting scroll 30, which moves the compression space between the wraps 20a and 30a toward the center of the fixed scroll 20, and the volume of the compression space is reduced, thereby compressing the fluid (air or gas).

[0009] The compressed air is discharged from a discharge port 22 formed in the center of the fixed scroll 20 and sent to the destination.

[0010] During such compression operation, the tip (end face) of the wrap 20a of the fixed scroll 20 and the tip (end face) of the wrap 30a of the orbiting scroll 30 rub against the surface of the mating scroll, generating heat. This causes the tip seals provided at the ends of the wraps 20a and 30a to deteriorate, while simultaneously increasing the temperature of the compressed fluid and reducing the compression efficiency.

[0011] A water-cooled scroll compressor is a compressor configured to cool the heat generated in the compression section of the fixed scroll 20 and the orbiting scroll 30 using cooling water.

[0012] As shown in Figure 1, a cooling water chamber C1 is provided on the opposite side of the wrap 20a of the fixed scroll 20, and a cooling water chamber C2 is provided on the opposite side of the wrap 30a of the orbiting scroll 30, and cooling is performed by flowing cooling water through the respective cooling water chambers C1 and C2.

[0013] The fixed scroll 20 is provided with an inlet fitting pipe 24 for introducing cooling water into the cooling water chamber C1 and an outlet fitting pipe 26 for discharging the cooling water. Cooling water hoses (not shown) are connected to the inlet fitting pipe 24 and the outlet fitting pipe 26, respectively.

[0014] Similarly, the orbiting scroll 30 is provided with an inlet fitting pipe 32 for introducing cooling water into the cooling water chamber C2 and an outlet fitting pipe 34 for discharging the cooling water. Cooling water hoses (not shown) are connected to the inlet fitting pipe 32 and the outlet fitting pipe 34, respectively.

[0015] As shown in Figures 2 and 3, the inlet fitting pipe 24 and outlet fitting pipe 26 of the fixed scroll 20 protrude to the outside of the fixed scroll 20, and the inlet fitting pipe 32 and outlet fitting pipe 34 of the orbiting scroll 30 protrude to the outside of the housing 10, allowing for the connection of cooling water hoses.

[0016] When the scroll compressor is in operation, as described above, the orbiting scroll 30 orbits the fixed scroll 20 along a circular orbit with radius Y1, which is the eccentricity of the eccentric axis 42 of the crankshaft 40.

[0017] At this time, the inlet fitting tube 24 and outlet fitting tube 26 of the fixed scroll 20 do not move.

[0018] However, the inlet fitting pipe 32 and outlet fitting pipe 34 of the orbiting scroll 30 will orbit along the same trajectory in accordance with the orbiting motion of the orbiting scroll 30, and consequently, the cooling water hoses connected to the inlet fitting pipe 32 and outlet fitting pipe 34 will also orbit.

[0019] In this case, continuous operation of the scroll compressor not only causes the cooling water hose to fatigue and become prone to breakage, but also causes the fitting pipes 32 and 34, which move the cooling water hose while supporting its weight and the cooling water flowing through it, to fatigue and become prone to breakage. [Prior art documents] [Patent Documents]

[0020] [Patent Document 1] Republic of Korea Publication Patent No. 10-2004-0104043 [Overview of the project] [Problems that the invention aims to solve]

[0021] The present invention was developed to solve the aforementioned conventional problems, and aims to provide a cooling water supply device for a water-cooled scroll compressor that can prevent damage to the fittings and cooling water hoses by blocking the transmission of the orbital motion of the cooling water supply and discharge fittings of the orbital scroll to the cooling water hoses, thereby preventing the cooling water hoses from moving. [Means for solving the problem]

[0022] To achieve the above objective, the cooling water supply device for a water-cooled scroll compressor according to the present invention comprises a housing 10, a fixed scroll 20 coupled to the end of the housing 10, an orbiting scroll 30 engaged with the fixed scroll 20, a crankshaft 40 that causes the orbiting scroll 30 to orbit along a circular orbit with radius Y1, and a cooling water chamber C2 for cooling the orbiting scroll 30, and is a cooling water supply device for flowing cooling water into the cooling water chamber C2 of the orbiting scroll 30, and comprises an inlet fitting pipe 32 and an outlet fitting pipe 34 provided on the orbiting scroll 30, respectively, for inflowing and outflowing cooling water into the cooling water chamber C2, The housing 10 includes a pivoting absorption mechanism 100 provided on the outer side, corresponding to the inlet fitting pipe 32 and the outlet fitting pipe 34, respectively. The rotation absorption mechanism 100 includes a fixed block 110 having a through hole 112 formed inside, a rotational central shaft 310 rotatably supported by the fixed block 110, an eccentric shaft 320 having an axis X4 that is eccentric to the rotational axis X3 of the rotational central shaft 310 by an eccentricity Y1 of the rotational scroll 30 relative to the fixed scroll 20, and a crank tube 300 having a cooling water passage 330 formed that penetrates and connects the rotational central shaft 310 and the eccentric shaft 320, and a connecting pipe 200 that is fastened to the through hole 112 on the opposite side of the crank tube 300 while remaining in a free state without being constrained by the crank tube 300, wherein the inlet side fitting pipe 32 or the outlet side fitting pipe 34 is connected to the eccentric shaft 320 of the crank tube 300, and a cooling water hose is connected to the connecting pipe 200.

[0023] In the cooling water supply device of the water-cooled scroll compressor according to the present invention, the orbiting absorption mechanism 100 includes a saddle portion 120 extending from the fixed block 110. The saddle portion 120 includes a plurality of fastening holes 122 for fastening to the housing 10. The bottom surface of the saddle portion 120 is formed along the surface contour shape of the housing 10 and consists of a saddle surface 124 that closely adheres to the surface of the housing 10.

[0024] In the cooling water supply device of the water-cooled scroll compressor according to the present invention, a mechanical seal type sealing element 500 for preventing leakage of cooling water between the fixed block 110 and the rotation center shaft 310 is provided in the through hole 112 of the fixed block 110.

[0025] In the cooling water supply device of the water-cooled scroll compressor according to the present invention, the mechanical seal type sealing element 500 is composed of a configuration in which a first snap ring 510, a first washer 520, a first spring support tube 530, a compression spring 550, a second spring support tube 540, a second washer 560, a pressure piece 570, a sealing seal 580, and a second snap ring 590 are sequentially coupled.

[0026] In the cooling water supply device of the water-cooled scroll compressor according to the present invention, a lip seal type sealing element 500 for preventing leakage of cooling water between the fixed block 110 and the rotation center shaft 310 is provided in the through hole 112 of the fixed block 110.

[0027] In the cooling water supply device of the water-cooled scroll compressor according to the present invention, the sealing element 500 has a sealing lip 602 on the inner circumference. The sealing lip 602 elastically adheres to the outer surface of the rotation center shaft 310, and a lip seal 600 whose outer diameter and side surface adhere to the through hole 112 to seal is provided at the end of the rotation center shaft 310.

Effect of the Invention

[0028] According to the cooling water supply device for a water-cooled scroll compressor of the present invention, the orbital absorption mechanism 100 allows the movement of the inlet fitting pipe 32 and outlet fitting pipe 34 of the orbital scroll 30, while holding the cooling water hose in place.

[0029] Therefore, the rotational motion of the cooling water supply and discharge fittings for the orbiting scroll is blocked from being transmitted to the cooling water hoses, thereby preventing the cooling water hoses from moving and thus preventing fatigue damage to the fittings and cooling water hoses. [Brief explanation of the drawing]

[0030] [Figure 1] This is a cross-sectional view of a conventional scroll compressor (section II in Figure 3). [Figure 2] This is a perspective view of a conventional scroll compressor. [Figure 3] This is a left side view of Figure 1. [Figure 4] This is an external perspective view of the scroll compressor according to the present invention. [Figure 5] This is a side view of the scroll compressor according to the present invention. [Figure 6] This is a cross-sectional view taken along line II-II in Figure 5. [Figure 7] This figure shows in detail the rotation absorption mechanism according to the present invention. [Figure 8] This is an enlarged cross-sectional view illustrating an example of a sealing element of the rotation absorption mechanism according to the present invention. [Figure 9] This is a cross-sectional enlarged view illustrating another example of a sealing element for a rotation absorption mechanism according to the present invention. [Modes for carrying out the invention]

[0031] Hereinafter, with reference to the attached drawings, a specific embodiment of the cooling water supply device for a water-cooled scroll compressor according to the present invention will be described.

[0032] Elements that are the same as those shown in Figures 1 to 3 will be described using the same reference numerals.

[0033] Figures 4 to 6 are explanatory diagrams of the cooling water supply device according to the present invention. Figure 4 is an external perspective view of the scroll compressor, Figure 5 is a side view, and Figure 6 is a cross-sectional view taken along line II-II in Figure 5.

[0034] Referring to Figures 4 to 6, the present invention has a configuration in which a rotation absorption mechanism 100 is provided on the outer part of the housing 10 corresponding to the inlet fitting pipe 32 and the outlet fitting pipe 34 of the orbiting scroll 30.

[0035] Specifically, one swivel absorption mechanism 100 is provided corresponding to the inlet fitting pipe 32, and another swivel absorption mechanism 100 is provided corresponding to the outlet fitting pipe 34.

[0036] The parts other than the aforementioned rotation absorption mechanism 100 are the same as those in Figures 1 to 3.

[0037] The rotation absorption mechanism 100 is a mechanism that allows the inlet fitting pipe 32 and outlet fitting pipe 34 of the rotation scroll 30 to move, while holding the cooling water hose in place so that it does not move.

[0038] The rotation absorption mechanism 100 comprises a fixed block 110 and a saddle portion 120.

[0039] One side of the fixed block 110 is connected to the inlet fitting pipe 32 or the outlet fitting pipe 34 so as to be able to rotate, and the other side is connected to and fixed to a cooling water hose.

[0040] The rotation absorption mechanism 100 is fixed to the surface of the housing 10 via the saddle part 120 and secured by fastening members such as bolts through the fastening holes 122.

[0041] Referring to Figure 6, the orbiting scroll 30 is provided with an inlet stud pipe 32a and an outlet stud pipe 34a for supplying cooling water to the cooling water chamber C2.

[0042] The inlet fitting pipe 32 and the outlet fitting pipe 34 are made of L-shaped curved pipes, one end of which is connected to the inlet stud pipe 32a and the outlet stud pipe 34a, and the other end of which is rotatably connected to the swivel absorption mechanism 100.

[0043] Figure 7 is a detailed view of such a rotation absorption mechanism 100. The left figure is a side view, and the right figure is a cross-sectional view taken along line III-III in the left figure.

[0044] As described above, the rotation absorption mechanism 100 includes a fixed block 110 and a saddle portion 120 extending from the fixed block 110.

[0045] The saddle portion 120 is a flange portion for fixing to the housing 10. Multiple fastening holes 122 are formed in such a saddle portion 120 for fastening fastening members such as bolts.

[0046] Furthermore, the bottom surface of the saddle portion 120 is composed of a saddle face 124 that matches the surface contour shape of the housing 10. Therefore, the saddle face 124 can adhere tightly to the surface of the housing 10 without any gaps.

[0047] A through hole 112 is formed in the fixed block 110, and a connecting pipe 200 is fastened to one end of this through hole 112. A cooling water hose (not shown) is connected to the connecting pipe 200.

[0048] On the opposite side of the connecting pipe 200, a crank pipe 300 is rotatably mounted in a through hole 112 of the fixed block 110, supported by a bearing 400.

[0049] The bearing 400 is covered by the bearing cover 410 and sealed by seals 420 and 430, etc.

[0050] In this case, the connecting pipe 200 and the crank pipe 300 remain free from each other's constraints, and the movement of the crank pipe 300 is not transmitted to the connecting pipe 200.

[0051] The crank tube 300 has a rotating central shaft 310 that is rotatably supported by the bearing 400, and an eccentric shaft 320 that has an axis X4 that is eccentric to the rotation axis X3 of the rotating central shaft 310 by an eccentricity Y1 of the orbiting scroll 30 relative to the fixed scroll 20.

[0052] A cooling water passage 330 is formed inside the crank pipe 300, passing through and connecting the central rotation axis 310 and the eccentric axis 320. Therefore, the cooling water that flows from the cooling water hose into the connecting pipe 200 flows through the cooling water passage 330 in the direction of the eccentric axis 320 and flows into the inlet fitting pipe 32.

[0053] Furthermore, the eccentric shaft 320 of each rotation absorption mechanism 100 is connected to the inlet fitting pipe 32 and the outlet fitting pipe 34.

[0054] Therefore, the eccentric shaft 320 can rotate around the rotational axis 310 in accordance with the rotational movement of the inlet fitting pipe 32 and the outlet fitting pipe 34.

[0055] In other words, when the scroll compressor is in operation, the orbiting scroll 30 orbits the fixed scroll 20 along a circular orbit with radius Y1, and the inlet fitting pipe 32 and outlet fitting pipe 34 also orbit along the same orbit. However, this orbital motion is absorbed by the orbital motion of the eccentric axis 320 and the rotational motion of the rotational center axis 310 of the crank pipe 300.

[0056] Therefore, since the cooling water hose connected to the connecting pipe 200 becomes immobile, the phenomenon of the cooling water hose being damaged due to fatigue, as in the conventional method, does not occur.

[0057] Similarly, since the cooling water hoses are not directly connected to the inlet fitting pipe 32 and the outlet fitting pipe 34, and the crank pipe 300 can rotate with almost no resistance due to the support of the bearing 400, the phenomenon of the inlet fitting pipe 32 and the outlet fitting pipe 34 being damaged due to fatigue, as in the conventional method, does not occur.

[0058] On the other hand, a sealing element 500 may be provided in the through hole 112 of the fixed block 110 to prevent leakage of cooling water between the fixed block 110 and the rotating central shaft 310.

[0059] The sealing element 500 may use a mechanical seal as shown in Figures 7 and 8, or a lip seal as shown in Figure 9. Other different sealing elements may also be used.

[0060] Figure 8 is an enlarged view showing the configuration of the sealing element 500 of the mechanical seal type according to the present invention.

[0061] Referring to Figure 8, the mechanical seal type sealing element 500 according to the present invention is configured by sequentially connecting a first snap ring 510, a first washer 520, a first spring support tube 530, a second spring support tube 540, a compression spring 550, a second washer 560, a pressure piece 570, a sealing seal 580, and a second snap ring 590, from the bearing 400 side toward the connecting tube 200 side.

[0062] The first spring support tube 530 and the second spring support tube 540 play a role in holding the center of the compression spring 550 by fitting their inner diameter portions together. These first spring support tube 530 and the second spring support tube 540 are fitted together so as to be axially slidable with respect to each other.

[0063] In this sealing element 500, the expansion force of the compression spring 550 presses against the pressure piece 570, compressing the sealing seal 580. This causes the sealing seal 580 to be in close contact with the outer diameter portion of the rotational central shaft 310 and the inner diameter portion of the through hole 112, preventing the ingress of cooling water.

[0064] Figure 9 is an enlarged view showing the configuration of the lip seal type sealing element 500 according to the present invention.

[0065] Referring to Figure 9, the lip seal type sealing element 500 is configured to have a lip seal 600 at the end of the rotating central axis 310.

[0066] The lip seal 600 has a sealing lip 602 on its inner circumference, which elastically adheres to and seals the outer surface of the rotating central shaft 310, and the outer diameter and sides of the lip seal 600 adhere to and seal the through hole 112.

[0067] To complement the lip seal 600, an O-ring 610 may be further provided between the rotating central shaft 310 and the through hole 112.

[0068] As shown in Figure 9, if it is necessary to enlarge the diameter of the through hole 112 in order to provide the lip seal 600, the connecting pipe 200 can be installed by fastening the adapter pipe 220 to the through hole 112 and then fastening the connecting pipe 200 to the adapter pipe 220.

[0069] Although specific preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to these embodiments, and it goes without saying that any person with ordinary skill in the art to which the present invention belongs can carry out various modifications without departing from the gist of the present invention as claimed in the claims.

Claims

1. A cooling water supply device comprising a housing (10), a fixed scroll (20) coupled to the end of the housing (10), an orbiting scroll (30) engaged with the fixed scroll (20), a crankshaft (40) that causes the orbiting scroll (30) to orbit along a circular orbit with radius equal to the eccentricity (Y1), and a cooling water chamber (C2) for cooling the orbiting scroll (30), wherein cooling water is supplied to flow cooling water into the cooling water chamber (C2) of the orbiting scroll (30), In order to allow cooling water to flow into and out of the cooling water chamber (C2), an inlet fitting pipe (32) and an outlet fitting pipe (34) are provided on the orbiting scroll (30), The housing (10) includes a pivoting absorption mechanism (100) provided on the outer part of the housing (10) corresponding to the inlet fitting pipe (32) and the outlet fitting pipe (34), respectively. The aforementioned rotation absorption mechanism (100) is A fixed block (110) having a through hole (112) formed inside, A crank tube (300) comprises a rotating central axis (310) rotatably supported by the fixed block (110), and an eccentric axis (320) having an axis (X4) that is eccentric to the rotation axis (X3) of the rotating central axis (310) by an amount of eccentricity (Y1) of the orbiting scroll (30) relative to the fixed scroll (20), and a cooling water passage (330) is formed that penetrates and connects the inside of the rotating central axis (310) and the eccentric axis (320), The system includes a connecting pipe (200) that is fastened to a through hole (112) on the opposite side of the crank pipe (300) while remaining free from constraint by the crank pipe (300), A cooling water supply device for a water-cooled scroll compressor, characterized in that the inlet fitting pipe (32) or the outlet fitting pipe (34) is connected to the eccentric shaft (320) of the crank pipe (300), and a cooling water hose is connected to the connecting pipe (200).

2. The aforementioned rotation absorption mechanism (100) is The fixed block (110) is provided with a saddle portion (120) extending from it. The saddle portion (120) is provided with a plurality of fastening holes (122) for fastening to the housing (10), The cooling water supply device for a water-cooled scroll compressor according to claim 1, characterized in that the bottom surface of the saddle portion (120) is formed in accordance with the surface contour shape of the housing (10) and consists of a saddle surface (124) that is in close contact with the surface of the housing (10).

3. The cooling water supply device for a water-cooled scroll compressor according to claim 1, characterized in that a mechanical seal type sealing element (500) is provided in the through hole (112) of the fixed block (110) to prevent leakage of cooling water between the fixed block (110) and the rotating central shaft (310).

4. The sealing element (500) of the mechanical seal type is, The cooling water supply device for a water-cooled scroll compressor according to claim 3, characterized in that a first snap ring (510), a first washer (520), a first spring support tube (530), a compression spring (550), a second spring support tube (540), a second washer (560), a pressure piece (570), a sealing seal (580), and a second snap ring (590) are connected in that order.

5. The cooling water supply device for a water-cooled scroll compressor according to claim 1, characterized in that a lip seal type sealing element (500) is provided in the through hole (112) of the fixed block (110) to prevent leakage of cooling water between the fixed block (110) and the rotating central shaft (310).

6. The sealing element (500) is A cooling water supply device for a water-cooled scroll compressor according to claim 5, characterized in that a lip seal (600) is provided at the end of the rotating central shaft (310), having a sealing lip (602) on its inner circumference, the sealing lip (602) elastically adhering to the outer surface of the rotating central shaft (310), and the outer diameter and side surface adhering to and sealing the through hole (112).

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