JP3569977B2 - Seal structure of compressor gas cooler - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a seal structure of a gas cooler of a compressor, and more particularly, to a seal structure for sealing a space between a cooler shell through which a compressed gas flows and a gas cooler inserted therein.
[0002]
[Prior art]
Generally, a compressor installed in a factory or the like sucks and compresses external air and supplies the high-pressure compressed air to each work site. Since the temperature increases during the compression process, the compressor is provided with a gas cooler for cooling the compressor.
[0003]
FIGS. 9 and 10 show a conventional gas cooler mounted, in which a gas cooler a is removably inserted into a cooler shell b formed in a casing C of the compressor. A relatively high temperature compressed air c is introduced into the cooler shell b, and the compressed air c is cooled and sent by passing through the gas cooler a. The illustrated gas cooler a is of a plate fin type, that is, a large number of plate fins f are provided between the front header d and the rear header e, and cooling is performed through these plate fins f and reciprocates between the headers d and e. A pipe g is provided, and cooling water flows through the cooling pipe g to cool the compressed air c passing between the plate fins f. The upper and lower surfaces of the plate fins f are closed by baffles h, and the compressed air c passes from the side.
[0004]
The cooler shell b covers the gas cooler a with a predetermined gap, and seal portions i are formed on the upper and lower baffles h in order to particularly prevent the compressed air c from blowing from the high temperature side to the low temperature side. That is, the seal part i is for partitioning the inside of the cooler shell b into two chambers, a high temperature side and a low temperature side.
[0005]
The seal portion i is formed by a seal member j protruding from the upper surface and the lower surface of the gas cooler a. The seal member i has an X-shaped cross section made of silicone rubber and has elasticity on the upper surface and the bottom wall of the cooler shell b. Contact. A pair of convex portions k are formed on the top and bottom walls of the cooler shell b so as to sandwich the seal member j, thereby improving the sealing performance. Some rubber seal members j have a Y-shaped cross section.
[0006]
The gas cooler a is horizontally inserted into the cooler shell b, and the front header e is cantilevered by being bolted to the casing C. During this insertion, the seal member j slides in the groove between the convex portions k to guide the sliding movement of the gas cooler a.
[0007]
[Problems to be solved by the invention]
By the way, in the above case, since the sealing member j is made of silicon rubber, there is a limit in heat resistance and corrosion resistance. The heat resistance temperature is limited to 200 ° C., and depending on the type of gas used, corrosion occurs due to the type of gas used. There is a problem that worsens. In addition, there is also a problem of durability such that it cannot be used for a long period of time because deterioration over time is remarkable. Further, there is a disadvantage that a large frictional resistance is generated when the gas cooler a is inserted, and the insertion cannot be easily performed.
[0008]
On the other hand, instead of this, there is a type using a stainless steel sealing plate having excellent heat resistance, corrosion resistance, etc. However, since this was conventionally used as a single sheet, the rigidity and pressing were weak, and the insertion of the gas cooler a was also performed. There is a problem that it sometimes bends and the seal deteriorates.
[0009]
Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a seal portion structure of a gas cooler of a compressor which has both rigidity and sealability and facilitates insertion of the gas cooler. is there.
[0010]
[Means for Solving the Problems]
To accomplish the above object, the seal together with the compressed gas inserted with a predetermined clearance above and below the gas cooler for cooling the compressed gas into the cooler shell being circulated, the gap above and below the above-mentioned gas cooler In the seal structure of a gas cooler of a compressor provided with upper and lower seals for partitioning the inside of the cooler shell into a high-temperature side and a low-temperature side, the seal is formed by forming an L-shaped cross section provided above and below the gas cooler. A stainless steel sealing plate and a stainless steel reinforcing plate superimposed on the sealing plate are attached to the seal mounting plate, and the sealing portion after insertion is sandwiched between the bottom wall and the inner wall of the upper surface of the cooler shell. and projects to form a pair of convex portions, respectively, and the seal mounting plate below the gas cooler is formed so as to slide on the convex portions of the lower Monodea .
[0011]
[Action]
According to the above configuration, the stainless steel sealing plate securely seals the gap with the cooler shell by its own elastic force and the pressing force of the stainless steel reinforcing plate.
[0012]
【Example】
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
5 to 7 are general views of a compressor to which the seal structure of a gas cooler according to the present invention is applied. The compressor 1 drives a centrifugal one-stage compressor 2 and a two-stage compressor 3 coaxially with a prime mover 4, and draws in external air from a suction port 5 to increase the pressure in each of the compressors 2 and 3. The high-pressure air is discharged from the discharge port 6. The prime mover 4 rotates a large-diameter gear housed in a gear case 7, to which a small-diameter pinion gear is connected to rotate the impellers of the compressors 2 and 3 coaxially at high speed. A cooler accommodating portion 8 is provided below the compressors 2 and 3 and the prime mover 4, and two cooler shells are provided adjacent to each other, each of which accommodates a gas cooler. Further, the compressor 1 controls an intake pipe 9 for introducing external air sucked from the suction port 5 into the first-stage compressor 2, a hydraulic device 10 for supplying lubricating oil into the gear case 7, and a prime mover 4. A control panel 11 for performing the operation is also provided.
[0014]
FIG. 2 is a diagram schematically showing the configuration of the compressor 1. As shown in FIG. First and second cooler shells 12 and 13 formed in a casing C for casting are formed adjacent to each other by being partitioned by partition walls 37, respectively. An intercooler 14 serving as a first gas cooler and an aftercooler 15 serving as a second gas cooler are accommodated in a center position of the second cooler shell 13 with a predetermined gap. The cooler shells 12 and 13 each have a rectangular parallelepiped shape that extends horizontally along the width direction of the compressor 1 (the left-right direction in FIGS. 5 and 6), and one end thereof is opened to insert the gas coolers 14 and 15 into the insertion ports 16. , 17 and the other end located on the back side in the insertion direction is closed, and further on the back side, an oil tank 18 for storing lubricating oil extends perpendicularly to the cooler shells 12, 13. Is provided.
[0015]
The intercooler 14 and the aftercooler 15 are of a plate fin type similar to the conventional example, and the front header 23 is shared. The coolers 14 and 15 are inserted and inserted into the cooler shells 12 and 13, respectively, and the front header 23 is bolted to the outer wall of the casing C around the insertion openings 16 and 17, whereby the coolers 14 and 15 are separated. It has come to be supported. FIG. 7 shows an inlet 23 a and an outlet 23 b of the cooling water provided on the front header 23.
[0016]
As shown in the drawing, the air sent from the intake pipe 9 is compressed in one stage by the one-stage compressor 2, sent to the first cooler shell 12 through the passage 19, and first cooled by the intercooler 14. Then, this air is sent to the two-stage compressor 3 in the passage 20, and is sent to the second cooler shell 13 through the passage 21 after being subjected to two-stage compression to a predetermined high pressure. Further, after being finally cooled by the after cooler 15, the cooling water is supplied to the outside through the discharge pipe 22 and the discharge port 6. Here, in the first and second cooler shells 12, 13, air is circulated from the inside to the outside, which are opposite to each other, so that the upstream side of the coolers 14, 15 is at the high temperature side H. The downstream side is a low-temperature side L, and sealers to be described later are formed in the coolers 14 and 15 so as to partition the high-temperature side H and the low-temperature side L.
[0017]
FIG. 3 is a perspective view of the intercooler 14 and the aftercooler 15 as viewed from below. Here, these coolers 14 and 15 have substantially the same configuration with the front header 23 being shared, so that only the after cooler 15 will be described below and the intercooler 14 will be omitted.
[0018]
A bundle 24 extends from the front header 23. The bundle 24 is configured by arranging a large number of rectangular plate fins 25 in parallel in the longitudinal direction of the cooler, penetrating a cooling pipe (not shown) therethrough, and welding them together. In this manner, the bundle 24 is formed in a box shape extending in the longitudinal direction, and a rear header 26 is provided at an end of the bundle 24 opposite to the front header 23. An upper baffle 27 and a lower baffle 28 for allowing compressed air to pass only in the lateral direction are provided on the upper surface and the lower surface of the bundle 24 so as to be detachable while being sandwiched by a baffle retainer 31. When viewed in a cross section perpendicular to the longitudinal direction of the cooler, the rear header 26 has a larger cross section than the bundle 24 including the baffles 27 and 28, so that the rear header 26 projects upward, downward, left and right with respect to the bundle 24. ing. Further, the baffles 27 and 28 have upper and lower seal portions which seal the gap between the upper and lower inner walls of the cooler shell 13 to partition the inside of the cooler shell 13 into a high temperature side and a low temperature side along the width center. 29 and 30 are provided.
[0019]
Since these seal portions 29, 30 are vertically symmetrical, only the lower seal portion 30 will be described. Referring to FIG. 1, the lower seal portion 30 is welded to the lower baffle 28 and bolted to the rear header 26. A stainless seal plate 33 for substantially sealing the seal mounting plate 31 bent into an L-shaped cross section and two stainless steel reinforcing plates 34 and 35 superimposed on the seal plate 33 are provided with a plurality of bolts 32a. , Nut 32b. Since there is a step between the rear header 26 and the baffle 28, the end of the seal mounting plate 31 is cut out and bent, and the seal mounting plate 31 is fixed to the rear header 26 with bolts 36.
[0020]
As shown in FIG. 4, the first and second cooler shells 12 and 13 are separated from each other by a partition wall 37 and are adjacent to each other. In particular, on their inner walls, the intercooler 14 and the after cooler 15 to be inserted are provided. A pair of convex portions 38 are formed so as to sandwich the upper and lower seal portions 29 and 30 so as to sandwich them. The convex portion 38 is continuously formed on the bottom surface portion, the rear side surface portion, and the upper surface portion (not shown) to form a groove 39, and the rear header is formed in the groove 39a formed on the rear side surface portion. A rubber rear seal 40 with which the abutment 26 abuts is fitted. In addition, a drain groove 41 is provided on the bottom surface adjacent to the one convex portion 38 located on the low temperature side. This is because even if drain water is generated on the high temperature side, it is moved to the low temperature side by the flow of air. The drain water stored in the drain groove 41 is discharged from a drain discharge pipe 42 shown in FIGS.
[0021]
As shown in FIG. 1, when the aftercooler 15 is inserted into the second cooler shell 13, the rear header 26 is placed on one of the protrusions 38 located on the high temperature side H, and the aftercooler 15 is inserted in the insertion direction. The rear end is also supported. Here, both the protrusions 38 project from the bottom surface by the same height, and the seal mounting plate 31 contacts only the protrusion 38 on the high-temperature side H. For this reason, a gap corresponding to the thickness of the seal mounting plate 31 is formed between the low-temperature side L convex portion 38 and the rear header 26. It is also possible to adopt a configuration in which a gap is not formed by contacting or providing a spacer. In addition, since the bottom surface of the rear header 26 is located below the lower baffle 28, the lower baffle 28 does not come into contact with the projection 38.
[0022]
In particular, in the groove 39 between the convex portions 38, the above-mentioned stainless seal plate 33 and the reinforcing plates 34 and 35 are accommodated. Referring to FIG. 3 as well, the seal plate 33 and the reinforcing plates 34 and 35 are formed in a belt shape extending in the cooler longitudinal direction and are attached to the seal attaching plate 31, and the length of the projecting direction is the seal plate. 33, the reinforcing plate 34, and the reinforcing plate 35 are formed so as to be shorter in order, and are formed in a round shape toward the high temperature side which are superimposed on each other before the cooler is inserted. In the inserted state of FIG. 1, the sealing plate 33 located on the outside is further bent tightly by elastic contact with the inner bottom surface of the groove 39, and the bending also causes the inner reinforcing plates 34 and 35 to be bent. A pressing force in the contact direction is applied to the seal plate 33. Then, as the protruding length is gradually shortened, the rigidity gradually decreases from the mounting side to the contact side, the rigidity increases on the mounting side and the deformation is small, and conversely, the contact side is softly deformed and the contact or seal is formed. To ensure.
[0023]
Although not shown, the upper seal portion 29 is vertically symmetrical with the lower seal portion 30, and the seal plate 33 is bent toward the high temperature side and abuts against the inner bottom surface of the groove 39. There is a slight gap without contacting the seal mounting plate 31.
[0024]
Next, the operation of the present embodiment will be described.
[0025]
When inserting or attaching the coolers 14 and 15, two of them are pushed into the cooler shells 12 and 13 simultaneously while holding the front header 23. At this time, the seal attachment plate 31 or the rear header 26 slides on the projection 38. However, since the seal plate 33 slides on the inner bottom surface of the groove 39, insertion becomes easy. That is, conventionally, the weight of the cooler is applied to the rubber seal member, and the frictional resistance is increased, so that it is difficult to insert the rubber seal member. Since they are one another, the frictional resistance can be reduced and insertion can be greatly facilitated. In particular, since the convex portions 38 receive the weight of the coolers 14 and 15 and the seal plate 33 is not weighted and has little deformation, an increase in frictional resistance due to the deformation of the seal plate 33 can be prevented, and insertion can be performed with a small force. . Further, since the upper convex portion 38 is not contacted, the insertion is facilitated.
[0026]
Further, after insertion, the front header 23 is fixed to the casing C, and the rear header 26 is placed on the convex portion 38 at the same time. Therefore, the coolers 14 and 15 are supported at both ends and are supported in the cooler shells 12 and 13 by their own weights. Can be prevented. That is, since the cooler's own weight has been conventionally supported by the rubber seal member, the deformation due to its deformation has occurred over time, and especially the sealing performance at the upper portion has been deteriorated. In the case of the present embodiment, such a situation does not occur, and a predetermined deformation can be applied to the seal plate 33 for a long period to obtain a stable sealing performance.
[0027]
Particularly, in the present embodiment, the seal portions 29 and 30 are constituted by a total of three sheets of the seal plate 33 for substantially sealing and the reinforcing plates 34 and 35 pressing the seal plate 33, so that the seal plate 33 is given sufficient rigidity. In addition, it is possible to prevent bending at the time of insertion, and to make sure that it is brought into contact, thereby greatly improving the sealing performance. By sequentially varying the lengths of these protrusions, the bending or deformation in the protrusion direction can be optimized so as to achieve both rigidity and sealability. In this embodiment, the dimensions and materials of the plates 33, 34, 35 are optimally determined, and the thickness of each of the plates 33, 34, 35 is t ₁ = t ₂ = t ₃ = 0.1 mm, and the projecting direction. Are l ₁ = 41 mm, l ₂ = 36 mm, and l ₃ = 32 mm, and SUS304 is used as the material. Further, since these are made of stainless steel, they are extremely excellent in heat resistance, corrosion resistance and durability, so that the types and temperatures of gases to be handled can be widely applied besides air at room temperature. Since the sealing plate 33 and the reinforcing plates 34 and 35 are bent toward the high temperature side, the leakage of the compressed gas from the high temperature side to the low temperature side can be completely prevented.
[0028]
Various modifications of the present embodiment are conceivable. For example, the number of the reinforcing plates 34 and 35 can be changed.
[0029]
【The invention's effect】
The present invention exhibits the following excellent effects.
[0030]
(1) It has both rigidity and sealability, and can ensure high sealing performance for a long period of time.
[0031]
(2) The gas cooler can be easily inserted.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view showing an embodiment of a seal portion structure according to the present invention.
FIG. 2 is a schematic perspective view showing a compressor.
FIG. 3 is a perspective view showing a gas cooler.
FIG. 4 is an enlarged perspective view of a main part showing a cooler shell.
FIG. 5 is a front view showing the entire compressed air.
FIG. 6 is a plan view showing the entire compressed air.
FIG. 7 is a side view showing the entire compressed air.
FIG. 8 is a schematic longitudinal sectional front view showing a state in which an aftercooler is supported.
FIG. 9 is a longitudinal sectional front view showing a conventional example.
FIG. 10 is a sectional view taken along line AA of FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Compressor 12, 13 Cooler shell 14, 15 Gas cooler 29, 30 Seal part 33 Stainless steel sealing plate 34, 35 Stainless steel reinforcing plate 38 Convex part H High temperature side L Low temperature side

Claims (3)

Together with the compressed gas is inserted with a predetermined clearance gas cooler for cooling the compressed gas into the cooler shell that is distributed in the upper and lower, the high temperature side in the cooler shell to seal the gap above and below the gas cooler and a low-temperature In a seal structure of a gas cooler of a compressor provided with upper and lower seal portions partitioning from the side, the seal portion is attached to a seal mounting plate having an L-shaped cross section provided above and below the gas cooler by a stainless steel seal plate. And a stainless steel reinforcing plate which is superimposed on the sealer, and a pair of convex portions are formed on the other side of the cooler shell so as to protrude so as to sandwich the above-mentioned seal portion on the inner wall of the bottom portion and the inner wall of the upper portion. and, sealing the seal mounting plate below the gas cooler is a gas cooler of the compressor, characterized in that it is formed so as to slide on the convex portion of the lower Structure. The cooler shell is partitioned by a partition plate, and two gas coolers, an aftercooler and an intercooler, are provided integrally with the front header, and the seal portions are provided above and below the two gas coolers, and each of the seal portions is provided. The seal structure of a gas cooler for a compressor according to claim 1 , wherein a pair of convex portions are respectively formed on a bottom surface portion and an upper surface portion of the cooler shell so as to sandwich the gas cooler shell, and these two gas coolers are inserted into the cooler shell . 3. The seal member according to claim 1 , wherein the seal portion is bent and projected from an outer peripheral portion of the gas cooler in an arc shape, and the stainless steel reinforcing plate is overlapped on an inner peripheral side of the seal plate and formed shorter than the seal plate. A seal structure of a gas cooler of the compressor according to the above.

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