Vertical compressor and method for manufacturing vertical compressor

Abstract

To provide a vertical compressor and a method for manufacturing a vertical compressor that enable a crank chamber unit for accommodating a crank shaft and a compression chamber unit including a compression chamber to be separable and can shorten a time of not capable of operating because of such as replacement of a piston ring.SOLUTION: A vertical compressor includes: a crank chamber unit 2 for accommodating a crank shaft 1; a piston rod 5 reciprocating vertically with the rotation of the crank shaft 1; and a compression chamber unit 4 detachably installed on an upper side of the crank chamber unit 2. When the compression chamber unit 4 is installed on the crank chamber unit 2, the piston rod 5 abuts on a lower part of a piston 6 inside a compression chamber 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vertical compressor that compresses gas and a manufacturing method of the vertical compressor, and more particularly to a vertical compressor and a manufacturing method of the vertical compressor that enable separation of a crank chamber unit that accommodates a crankshaft and a compression chamber unit that has a compression chamber, thereby shortening the time that the compressor is unable to operate due to replacement of piston rings, etc. [Background technology]

[0002] Conventionally, reciprocating compressors are used to compress various gases, such as hydrogen. Patent Document 1 describes a reciprocating compressor that compresses hydrogen gas, which is a fuel gas. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-116177 Summary of the Invention [Problem to be solved by the invention]

[0004] In a reciprocating compressor, whether it is a vertical or horizontal (horizontal or horizontally opposed) type, a piston ring is attached to the outer surface of the piston that compresses the gas in order to maintain airtightness between the piston and the inner wall of the compression chamber (cylinder).

[0005] The piston rings attached to the pistons wear out as the compressor is used, and therefore must be replaced periodically. Replacing the piston rings requires disassembling the compression chamber and removing the piston from the compression chamber, which takes a considerable amount of time.

[0006] The compressor cannot operate during such disassembly and replacement work, and therefore, when piston rings are replaced, the compressor cannot operate for a considerable period of time. This would result in a situation where compressed gas could not be supplied periodically for a considerable period of time, which would cause inconvenience as it would hinder the supply of fuel gas etc. according to demand.

[0007] Therefore, an object of the present invention is to provide a vertical compressor and a method for manufacturing a vertical compressor that can separate a crank chamber unit that houses a crankshaft from a compression chamber unit that has a compression chamber, thereby shortening the time that the compressor is unable to operate due to, for example, replacing piston rings.

[0008] Other objects of the present invention will become apparent from the following description. [Means for solving the problem]

[0009] The above problems are solved by the following inventions.

[0010] 1. A vertical compressor that compresses gas supplied from a suction port to a compression chamber and delivers the compressed gas from a discharge port, a crankcase unit accommodating a crankshaft that is driven to rotate; a piston rod connected to the crankshaft, extending upward, and reciprocating up and down as the crankshaft rotates; a compression chamber unit detachably installed above the crank chamber unit; a piston disposed in a compression chamber of the compression chamber unit; Equipped with When the compression chamber unit is installed on the crank chamber unit, the piston rod abuts against the lower part of the piston and moves upward, thereby moving the piston upward and compressing the gas in the compression chamber. A vertical compressor characterized by: 2. The compression chamber unit includes a plurality of compression chambers arranged vertically, each of which has a piston disposed therein, The pistons in the compression chambers are connected vertically, and the piston rod abuts against the bottom of the lowest piston. 2. The vertical compressor according to claim 1, 3. A method for manufacturing a vertical compressor that compresses gas supplied from a suction port to a compression chamber and delivers the compressed gas from a discharge port, comprising the steps of: a crank chamber unit that houses a crankshaft to which an upwardly extending piston rod is connected and which is rotationally driven to reciprocate the piston rod up and down; a compression chamber unit having a compression chamber in which a piston is disposed; The compression chamber unit is detachably installed above the crank chamber unit, and the piston rod is brought into contact with the lower part of the piston. A method for manufacturing a vertical compressor. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a vertical compressor and a method for manufacturing a vertical compressor, in which a crank chamber unit that accommodates a crankshaft and a compression chamber unit that has a compression chamber can be separated, thereby shortening the time that the compressor is unable to operate due to, for example, replacing piston rings. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a longitudinal cross-sectional view schematically illustrating an embodiment of a vertical compressor according to the present invention. [Figure 2] FIG. 10 is a vertical cross-sectional view schematically showing a state in which a compression chamber unit is separated in the vertical compressor. [Figure 3] FIG. 1 is a vertical cross-sectional view schematically showing a vertical compressor configured as a multi-stage, multi-cylinder compressor. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0014] FIG. 1 is a longitudinal sectional view schematically showing an embodiment of a vertical compressor of the present invention. In this embodiment, as shown in FIG. 1, the vertical compressor of the present invention is a vertical compressor that is configured to include a crank chamber unit 2 that houses a crankshaft 1, and a compression chamber unit 4 that has a compression chamber (cylinder) 3 and is detachably installed above the crank chamber unit 2.

[0015] The compression chamber 3 forms a cylindrical space, and a gas to be compressed, such as hydrogen, is supplied from an intake port (not shown) via an intake check valve. Compressed gas is discharged from the compression chamber 3 via a discharge port (not shown) via a discharge check valve.

[0016] The crankshaft 1 housed in the crankcase unit 2 is housed in the lower part of the casing of the crankcase unit 2 so that it can rotate about its axis with its rotation axis horizontal. The crankshaft 1 is driven to rotate about its axis by a power source such as a motor (not shown).

[0017] A lower end portion of a piston rod 5 is connected to the crank portion of the crankshaft 1. The piston rod 5 extends upward, with its upper end portion facing outward from the crank chamber unit 2. When the crankshaft 1 is driven to rotate, the piston rod 5 is reciprocated up and down. The piston rod 5 is supported on the outer periphery of the portion supported by the casing of the crank chamber unit 2 via a rod packing (not shown).

[0018] A piston 6 is disposed in the compression chamber 3 of the compression chamber unit 4. The piston 6 is formed in a cylindrical shape, is fitted into the compression chamber 3, and is slidable in the up and down direction. A plurality of piston rings are attached to the outer peripheral surface of the piston 6, and these piston rings are capable of maintaining airtightness between the piston 6 and the inner wall of the compression chamber 3.

[0019] In the compression chamber 3, the space above the piston 6 is a space for compressing the gas. The compression chamber 3 is open downwards in the compression chamber unit 4, and from below the compression chamber unit 4, the lower part (bottom surface) of the piston 6 fitted in the compression chamber 3 can be seen.

[0020] The compression chamber unit 4 is removably installed on the upper side of the crank chamber unit 2 by fixing, for example by bolting, a flange portion 4a provided on the outer periphery of the lower part of the casing to a flange portion 2a provided on the outer periphery of the upper part of the casing of the crank chamber unit 2.

[0021] When the compression chamber unit 4 is installed on the crank chamber unit 2 , the upper end portion of the piston rod 5 abuts against the lower part of the piston 6 . When the compression chamber unit 4 is installed on the crank chamber unit 2 and the upper end portion of the piston rod 5 abuts against the lower part of the piston 6, the crankshaft 1 is driven to rotate and the piston rod 5 moves upward, which in turn moves the piston 6 upward and compresses the gas in the compression chamber 3.

[0022] The gas compressed in the compression chamber 3 is discharged from the discharge port, and then, when the piston rod 5 moves downward and the piston 6 also moves downward, gas is supplied from the intake port to the compression chamber 3. When the piston 6 moves downward, it is moved downward by its own weight and the pressure of the gas supplied to the compression chamber 3. When the supply of gas to the compression chamber 3 is completed, the piston rod 5 is moved upward, the piston 6 is also moved upward, and the gas in the compression chamber 3 is compressed. By repeating this cycle, compressed gas is continuously discharged from the compression chamber 3.

[0023] FIG. 2 is a vertical cross-sectional view schematically showing a state in which the compression chamber units are separated in the vertical compressor. The compression chamber unit 4 is fixed to the upper side of the crank chamber unit 2 by bolts, for example, and can therefore be easily removed from the crank chamber unit 2 as shown in FIG.

[0024] At this time, if a separate compression chamber unit 4 equipped with a piston 6 having unworn piston rings is prepared, this separate compression chamber unit 4 can be immediately attached to the crank chamber unit 2, and the operation of this vertical compressor can be immediately resumed. Therefore, in this vertical compressor, the time during which the compressor is unable to operate due to wear of the piston rings can be minimized. The replacement work of the piston rings of the removed compression chamber unit 4 can be carried out over a long period of time while the vertical compressor using the separate compression chamber unit 4 is in operation.

[0025] Furthermore, when manufacturing this vertical compressor, the crank chamber unit 2 and the compression chamber unit 4 are constructed as described above, and the compression chamber unit 4 is detachably installed above the crank chamber unit 2, and the piston rod 5 is brought into contact with the lower part of the piston 6, thereby completing the manufacturing process and making the compressor easy to manufacture.

[0026] FIG. 3 is a vertical cross-sectional view schematically showing the vertical compressor configured as a multi-stage, multi-cylinder compressor. As shown in FIG. 3, this vertical compressor can be configured to have multiple stages and multiple cylinders.

[0027] In the case of a multi-stage configuration, a plurality of compression chambers 3, 3a, each having a piston 6, 6a disposed therein, are arranged vertically within the compression chamber unit 4. The pistons 6, 6a in the compression chambers 3, 3a are connected vertically, and the upper end portion of the piston rod 5 abuts against the lower part of the lowest piston 6.

[0028] When configured as a multi-cylinder engine, another piston rod 15 is provided that is reciprocated up and down by the crankshaft 1 described above, and another compression chamber unit 14 similar to the compression chamber unit 4 described above is removably attached above this other piston rod 15.

[0029] The other compression chamber unit 14 is provided with a plurality of compression chambers 13, 13a arranged vertically, each of which has a piston 16, 16a arranged therein. The other compression chamber unit 14 is removably installed on the upper side of the crank chamber unit 2 by fixing, for example by bolting, a flange portion 14a provided on the outer periphery of the lower part of the casing to a flange portion 12a provided on the outer periphery of the upper part of the casing of the crank chamber unit 2. The other compression chamber unit 14 is also fixed to the upper side of the crank chamber unit 2 by, for example, bolting, and can therefore be easily removed from the crank chamber unit 2.

[0030] A vertical compressor configured with multiple stages and multiple cylinders in this way can be configured as a multi-stage compressor by connecting the compression chambers 3, 13, 3a, and 13a in series. That is, the discharge port from the first-stage compression chamber 3 is connected to the suction port of the second-stage compression chamber 13, the discharge port from the second-stage compression chamber 13 is connected to the suction port of the third-stage compression chamber 3a, and the discharge port from the third-stage compression chamber 3a is connected to the suction port of the fourth-stage compression chamber 13a.

[0031] A vertical compressor configured as a multi-stage compressor has multiple (e.g., four) compression stages, and can gradually compress and pressurize the gas at each compression stage. For example, at the fourth compression stage, the gas to be compressed can be pressurized to a pressure of about 500 bar (50 MPa).

[0032] In a vertical compressor configured as a multi-stage compressor in this way, gas is compressed and pressurized at each compression stage, so the inner diameter and volume of the compression chambers 3, 13, 3a, 13a of each compression stage are made smaller as the stage progresses.

[0033] The present invention is not limited to the above-described embodiments, and various improvements and design changes may be made within the scope of the present invention, and it goes without saying that the specific detailed structure, numerical values, and control contents of the control device may also be changed as appropriate. Furthermore, the embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0034] 1 crankshaft 2 Crankcase unit 2a Flange 3 Compression chamber (cylinder) 3a Compression chamber 4 compression chamber unit 4a Flange 5 Piston rod 6 pistons 6a Piston 12a Flange 13 Compression chamber 13a Compression chamber 14a Flange 15 Piston rod 16 pistons 16a piston

Claims

1. A vertical compressor that compresses gas supplied from a suction port to a compression chamber and delivers the compressed gas from a discharge port, a crankcase unit accommodating a crankshaft that is driven to rotate; a piston rod connected to the crankshaft, extending upward, and reciprocating up and down as the crankshaft rotates; a compression chamber unit detachably installed above the crank chamber unit; a piston disposed in a compression chamber of the compression chamber unit; Equipped with When the compression chamber unit is installed on the crank chamber unit, the piston rod abuts against the lower part of the piston and moves upward, thereby moving the piston upward and compressing the gas in the compression chamber. A vertical compressor characterized by:

2. The compression chamber unit includes a plurality of compression chambers arranged vertically, each of which has a piston disposed therein, The pistons in the compression chambers are connected vertically, and the piston rod abuts against the bottom of the lowest piston.

2. The vertical compressor according to claim 1.

3. A method for manufacturing a vertical compressor that compresses gas supplied from a suction port to a compression chamber and delivers the compressed gas from a discharge port, comprising the steps of: a crank chamber unit that houses a crankshaft to which an upwardly extending piston rod is connected and which is rotationally driven to reciprocate the piston rod up and down; a compression chamber unit having a compression chamber in which a piston is disposed; The compression chamber unit is detachably installed above the crank chamber unit, and the piston rod is brought into contact with the lower part of the piston. A method for manufacturing a vertical compressor.

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