KR100842301B1 - Combined scroll expander-compressor - Google Patents

Abstract

The present invention provides a housing, a scroll expander provided on one side of the housing, a scroll compressor provided on the other side opposite to one side of the housing, and a power transmission means for interlocking the movement of the scroll scroll of the scroll expander and the scroll scroll of the scroll compressor. And, in the integrated scroll expander-compressor is provided with the power transmission means is composed of a separator plate separating the inflator side and the compressor side, the separation plate central portion is provided with a back pressure chamber hole to form a back pressure chamber, and the expansion chamber and The back pressure hole is installed on the rotating scroll plate of the inflator so as to be in communication with each other, and the crank body of the power transmission means is freely rotated in the crank hole of the separation plate outer circumference, and an eccentric drive pin is pivoted on one side of the power transmission means. Fastened to a groove provided in the scroll plate, On the other side, a driven pin having a phase difference with the driving pin is fastened to a groove provided in the compressor scroll wheel, and directly transmits the power of the expander to the compressor, and the center of gravity of the swing scroll of the expander and the swing scroll of the compressor The centrifugal force generated by the swing scrolls is offset by each other by being positioned 180 degrees to the opposite side of the pivot center at all times, and at least three power transmission means are installed to form a means for preventing the rotation of the swing scrolls. And an integrated scroll expander-compressor.

 Expander, compressor, swing scroll, fixed scroll, expansion chamber, compression chamber, power transmission means, drive pin, driven pin, back pressure chamber, separating plate, housing

Description

Integrated scroll expander-compressor {COMBINED SCROLL EXPANDER-COMPRESSOR}

1 is a cross-sectional side view of a specific embodiment of the present invention.

2 is a sectional front view of a specific embodiment of the present invention.

3 is a perspective view showing a swing scroll and a fixed scroll on the inflator side constituting a specific embodiment of the present invention.

4 is a perspective view showing a swing scroll and a fixed scroll on the compressor side constituting a specific embodiment of the present invention.

5 is a front cross-sectional view, a side cross-sectional view and a perspective view showing a separator constituting a specific embodiment of the present invention.

Figure 6 is a perspective view and a side cross-sectional view showing a power transmission means constituting a specific embodiment of the present invention.

7 is a cross-sectional side view of an embodiment of a conventional scroll expander-compressor.

<Explanation of symbols for the main parts of the drawings>

10: scroll inflator

11: Fixed scroll of scroll inflator

12: Fixed scroll slab of scroll inflator

13: Fixed scroll wrap on scroll inflator

15: Inlet of scroll inflator

19: discharge port of the scroll expander

21: Swivel scroll of scroll inflator

22: Slewing scroll slab of scroll inflator

23: Swivel scroll wrap of scroll inflator

24: Swivel scroll dimple of scroll inflator

25: Drive pin groove of scroll inflator turning scroll slab

26: Slewing scroll back pressure of scroll inflator

28: expansion chamber of scroll inflator

30: scroll compressor

31: Fixed scroll of scroll compressor

32: fixed scroll slab of scroll compressor

33: Fixed scroll wrap of scroll compressor

35: inlet of scroll compressor

39: discharge port of the scroll compressor

41: Swivel scroll of a scroll compressor

42: Swivel scroll slab of scroll compressor

43: Swivel scroll wrap of scroll compressor

44: Swivel scroll dimple of scroll compressor

45: Follower pin groove of scroll compressor turning scroll slab

48: compression chamber of scroll compressor

50: separator

51: separator plate

51a: Inflator side plane of separator

51b: Compressor side plane of separator plate

52: Crank hole for power transmission means of separator

53: Back pressure chamber hole of separator plate

60: power transmission means

61: power transmission crank body

62a: power train drive pin

62b: power train driven pin

64: power transmission body bearing

65a: power transmission drive pin bearing

65b: power train driven pin bearing

90: housing

The present invention relates to a fluid machine directly connected to a refrigeration cycle, an air supply system for fuel cells, and an expander used to convert fluid energy into useful mechanical energy in various industries and a compressor for compressing gas using the power obtained therefrom. More specifically, the axial power obtained from the scroll expander is transmitted to the swing scroll of the expander and the scroll scroll of the scroll compressor directly connected by the power transmission means to compress the gas to convert the mechanical energy obtained from the expander into electrical energy through the generator. The present invention relates to an integrated expander-compressor, which eliminates the conversion process, thereby increasing energy transfer efficiency and simplifying the structure.

In refrigeration cycles, fuel cells, and general industrial applications, the fluid energy of high-pressure gas is converted into mechanical energy by inflating the gas, which combines the expander and compressor in one housing for use in compressing the gas again. One inflator-compressor fluid machine has been proposed.

FIG. 7 shows a cross-sectional side view of a specific embodiment of a conventional scroll expander-compressor combination, where the conventional scroll expander-compressor assembly 26 shown in FIG. 7 has a pivoting scroll 34 having an axis 36 on the expander side. And a fixed scroll (32), and on the compressor side is composed of a swing scroll (40) and a fixed scroll (38) connected to the swing scroll (34) on the inflator side by the shaft (36). Rotation is prevented by 66.

However, such a conventional scroll expander-compressor combination 26 requires the installation of a counterweight 58 to balance the eccentricity of the shaft or the eccentricity of the swing scroll, and the old dam ring for preventing rotation of the swing scroll 34. 66, and each of the back pressure chambers on the inflator side and the compressor side to offset the axial gas forces pushed between the swinging scrolls 34 and 40 and the fixed scrolls 32 and 38, respectively. 81, 83), such as the overall structure is complicated and the accuracy is difficult to maintain. In addition, in the case of an air supply system of a fuel cell targeting a clean gas in which oil or liquid refrigerant is to be excluded from the working gas, a conventional shaft 36, a crank piece 56, a sleeve bearing 60, 62, etc. Combination power transmission methods suffer from friction, wear and heat generation.

The present invention comprises a scroll expander and a scroll compressor together in one housing as described above, by connecting the swing scroll on the expander side and the swing scroll on the compressor side through the drive-driven integral pin to transfer the axial force obtained from the expander to the compressor. It eliminates the process of converting the mechanical energy of the expander into electrical energy, and also eliminates the need for the use of a balancing or anti-rotation mechanism, the Old Daming, and also achieves axial compliance between the swinging and fixed scrolls. The purpose of the present invention is to provide an integrated scroll expander-compressor having a low power transmission loss, a compact and efficient structure with a very simple structure in general, such as having a common back pressure chamber applicable to both sides.

The configuration of the present invention devised to achieve the above object is as follows.

The present invention provides a power source for interlocking a motion of a scroll expander provided on one side of the housing, a scroll compressor provided on the other side opposite to one side of the housing, and a swing scroll plate of the scroll expander and a swing scroll plate of the scroll compressor. In the unitary scroll expander-compressor, which is provided with a transmission means and a separating plate on which the power transmission means is installed, separating the inflator side and the compressor side,

A back pressure chamber hole for forming a back pressure chamber is installed at the center of the separator to generate an axial sealing force that pushes the swing scroll of the expander toward the fixed scroll on the expander side and the swing scroll of the compressor toward the fixed scroll on the compressor side. An axial seal is formed in each of the inflator and the compressor, and a crank body of the power transmission means is freely rotatable in the crank hole of the separation plate outer circumference, and an eccentric drive pin is provided on one side of the power transmission means to expand the scroll plate of the expander side. It is fastened to a hole provided in the rear side, and the other side opposite to one side of the power transmission means is driven pin having a 180 degree phase difference with the drive pin is inserted into the hole provided on the rear of the compressor scroll wheel plate to supply the power of the inflator Directly to the expander pivoting scroll and the compressor pivoting The crawl is always located 180 degrees to the opposite side of the pivot center so that the centrifugal forces generated by the pivot scrolls cancel each other, and at least three power transmission means are provided to form a means to prevent the rotation of the pivot scrolls. Characterized in that.
According to the present invention, it is possible to install a back pressure hole in the rotating scroll plate of the inflator so as to communicate the back pressure chamber with the expansion chamber of the inflator. As another back pressure chamber constituting means, a back pressure hole may be provided in the rotating scroll plate of the compressor so as to communicate the back pressure chamber with the compression chamber of the compressor.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the integrated scroll expander-compressor according to the present invention includes a housing 90, an expander 10 installed on one side of the housing, and a compressor installed on the other side of the housing. 30, the power transmission means 60 for interlocking the movement of the swinging scroll 21 of the expander and the swinging scroll 41 of the compressor, the swinging scroll mirror 22 of the expander, and the rotating scroll of the compressor. It is located between the hard plate 42 and comprises a separating plate 50 fixed to the housing (90).

The fixed scroll 11 of the expander is fixed to one side of the housing 90, the swinging scroll 21 of the expander to the pivoting movement based on the center of the fixed scroll 11, the invol The root wrap 23 and the fixed scroll involute trap 13 are combined with each other to form a plurality of expansion chambers 28.

The fixed scroll 31 of the compressor is fixed to the other side of the housing 90, the rotating scroll 41 of the compressor to the pivoting movement relative to the center of the fixed scroll 31, the rotation of the scroll The involute trap 43 and the involute trap 33 of the fixed scroll are combined with each other to form a plurality of compression chambers 48.

The separating plate 50 is positioned between the expander swing scroll plate 22 and the compressor swing scroll plate 42 so that the space of the back pressure chamber hole 53 in the center of the separator becomes a sealed space, A back pressure hole 26 communicating with the expansion chamber 28 of the inflator is provided.

3 shows a turning scroll 21 and a fixed scroll 11 of the inflator 10. The high pressure gas is sucked into the inlet port 15 of the fixed scroll center fixed to one side of the housing 90, and the sucked gas includes the involute trap 13 of the fixed scroll and the involute trap 23 of the turning scroll. It expands in a plurality of expansion chambers 28 formed in combination with each other to cause the swinging movement of the swinging scroll 21 and is discharged to the discharge port 19. The driving pin 62a of the power transmission means is mounted in the concave groove 25 formed on the rear surface of the turning scroll plate 22.

In FIG. 4, the turning scroll 41 and the fixed scroll 31 of the compressor 30 are shown. Gas introduced into the compressor 30 through the suction port 35 provided on the outer circumferential portion of the fixed scroll 31 fixed to the other side of the housing 90 is the involute trap 33 of the fixed scroll and the involving scroll wheel. The root wrap 43 is compressed in a plurality of compression chambers 48 formed by combining with each other and discharged through the discharge port 39 in the center of the fixed scroll. A driven pin 62b of the power transmission means is mounted in the concave groove 45 provided on the rear surface of the turning scroll plate 42.

 FIG. 5 shows a separating plate 50 positioned between the swing scroll plate 22 of the expander and the swing scroll plate 42 of the compressor. In the back pressure chamber hole 53 in the center of the separator plate, back pressure is caused by the gas leaking through the back pressure hole 26 installed in the swing scroll plate 22 of the inflator so as to communicate with the expansion chamber 28 of the inflator 10. Is formed. Due to the back pressure of the back pressure chamber hole 53, the axially stiffness, that is, the expander side swing scroll 21 is pushed toward the fixed scroll 11 of the inflator and the compressor side swing scroll 41 is simultaneously fixed to the fixed scroll 31 of the compressor. The sealing force pushing toward) is generated.

The outer periphery of the separator plate is provided with crank holes 52 for fitting the crank body 61 of the power transmission means. Each side 51a, 51b of both sides of the separating plate 50 abuts on the rear side of the rotating scroll plate 22 of the inflator and the rear side of the rotating scroll plate 42 of the compressor, respectively. It also includes the function of a kind of thrust face that slides the motion of the hard plates 22 and 42 according to the turning motion.

6 shows a power transmission means 60. The power transmission means has a cylindrical crank body 61 and cylindrical drive pins 62a and driven pins 62b extending eccentrically with a 180 degree phase difference from both sides of the body. The drive pin 62a of the power transmission means 60 is fitted into the turning scroll light plate rear groove 25 on the inflator side, and the driven pin is fitted into the turning scroll light plate rear groove 45 on the compressor side. When the crank body 61 of the power transmission means is fitted into the crank hole 52 of the separation plate for reducing friction, and the pins 62a and 62b of the power transmission means have grooves of the corresponding turning scroll slab ( The bearings 64, 65a and 65b are installed when fitted to the 25 and 45, respectively.

When the high pressure gas is sucked through the inlet side 15 of the inflator-compressor and expands in the plurality of expansion chambers 28, the turning scroll 21 of the inflator is turned by the fluid energy of the high pressure gas. You exercise. The swing motion of the inflator-side swing scroll 21 includes a drive pin 62a fitted into the groove 25 at the rear of the swing scroll tilt plate 22 and a groove 45 at the rear of the compressor side swing scroll plate 42. To generate the pivoting motion of the compressor-side swing scroll (41) by means of a power transmission means (60) having a driven pin (62b) fitted to the head and having a crank body capable of free rotation in the crank hole (52) of the separator plate. The gas compression is performed in the compressor 30.

At this time, the drive pin 62a and the driven pin 62b of the power transmission means 60 are eccentric with each other with a phase difference of 180 degrees, so that the turning scroll 21 of the expander and the turning scroll of the compressor are respectively fastened thereto. Reference numeral 41 is always located opposite to each other on the basis of the turning center, so that the centrifugal forces of these turning scrolls 21 and 41 cancel each other, so that the mounting of a separate counterweight is unnecessary.

In addition, the three power transmission means (60) provided with a driving pin and a driven pin having a phase difference of 180 degrees with each other are installed in the crank hole (52) of the separating plate (50), so that the expander side swing scroll (21) and the compressor side swing scroll (41) Everyone does not need to rotate, but only turns, so there is no need for additional anti-rotation measures such as Oldhamling.

In general, when there is no axial compliance force that makes the swing scroll closely contact with the fixed scroll, the expander 10 pushes the swing scroll 21 of the expander away from the fixed scroll 11 of the expander when the gas expands. As the axial gap between the swinging scroll 21 and the fixed scroll 11 of the expander is not canceled due to failure of the axial gas force, and the leakage increases, the efficiency of the expander is reduced, and the compressor 30 is also the same. If there is no axially stiffening force from the back pressure chamber hole 53, the turning scroll of the compressor cannot be canceled by offsetting the axial gas force that pushes the turning scroll 41 and the fixed scroll 31 away from each other in the gas compression process. Compressor efficiency decreases because the axial clearance between the 41 and the fixed scroll 31 increases and the resulting leakage increases.

The back pressure hole 26 in the expansion chamber 28 is provided in the back pressure chamber hole 53 in the center of the separation plate located between the rear scroll scaffold 22 of the expander and the rear scroll scaffold 42 of the compressor. The shaft that pushes the expander side swing scroll 21 toward the fixed scroll 11 of the expander due to the back pressure formed by the gas leaked through the air, and also pushes the compressor side swing scroll 41 toward the fixed scroll 31 of the compressor. Directional stresses are generated to minimize leakage of inflators and compressors.

The integrated scroll expander-compressor according to the present invention is mechanically obtained by converting from the fluid energy in the expander since the swing scroll of the expander and the scroll scroll of the compressor are directly connected by a power transmission means having driven pins and driven pins having a phase difference of 180 degrees. There is no need to convert energy into electrical energy, so power transmission is effective.

Since the turning scrolls of the expander and the rotating scrolls of the compressor, which are respectively fastened to the driving pins and the driven pins of the power transmission means, are always located opposite to each other with respect to the turning center, the centrifugal forces of these turning scrolls 21 and 41 cancel each other out. So no need to install a separate counterweight,

In addition, when the three or more power transmission means is installed, there is no need to use a separate anti-rotation mechanism such as Olddam ring,

Since the crank body of the power transmission means can be inserted into the crank hole 52 of the outer peripheral portion of the separator plate, the structure is very simple.

In addition, the back pressure formed in the back pressure chamber in the center of the separator generates a sealing force that pushes the swing scroll of the expander and the swing scroll of the compressor toward each fixed scroll to minimize leakage loss, thereby improving the performance of the expander and the compressor.

Claims (2)

A housing, a scroll expander provided on one side of the housing, a scroll compressor provided on the other side opposite to one side of the housing, power transmission means for interlocking a movement of the scroll scroll of the scroll expander and the scroll scroll of the scroll compressor; In an integrated scroll expander-compressor, in which a power transmission means is installed and composed of a separator plate separating the inflator side and the compressor side, A back pressure chamber hole is formed at the center of the separator to form a back pressure chamber, and a back pressure hole is installed in the turning scroll hard plate of the inflator so as to communicate with the expansion chamber of the inflator. Installed to rotate freely, One side of the power transmission means is eccentric drive pin is fastened to the groove provided in the expander side turning scroll plate, the other side opposite to the one side of the power transmission means is driven pin having a 180 degree phase difference with the drive pin is the compressor side pivot Is fastened to the groove provided in the scroll plate to transfer the power of the inflator directly to the compressor, Since the center of gravity of the swing scroll of the expander and the swing scroll of the compressor is always located 180 degrees opposite to each other with respect to the swing center, the centrifugal forces generated by the swing scrolls cancel each other. And at least three power transmission means are formed to form a means for preventing the rotation of the swing scrolls. The method of claim 1, And a back pressure hole is provided in a rotating scroll plate of the compressor to communicate the back pressure chamber with the compression chamber of the compressor.

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