Compression device for railway

Abstract

The invention provides a compression device for railways. A compression device for railways according to one embodiment of the present invention is provided with: a non-oil-supply compressor for compressing and outputting sucked air; a first filter that is disposed in an intake path for air sucked into the compressor and that collects dust sucked into the intake path by fibers; and a second filter which is disposed in the air intake path and collects the dust by means of electric power or magnetic force.

Description

Technical Field

[0001] This invention relates to a compression device for railway use. Background Technology

[0002] Patent Document 1 discloses an air compression device for vehicles that compresses air drawn in from the air intake of an air compressor. An air filter is provided in the air intake of the air compressor. This suppresses the inflow of dust into the air compressor.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2005-076481 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] Compressors exist in both oil-lubricated and oil-free types. To save labor and time on lubrication, the demand for oil-free compressors is increasing. However, oil-free compressors suffer from reduced lubrication, making them more prone to dust-induced compressor degradation compared to oil-lubricated compressors. Consequently, the durability of the compressor may become insufficient with conventional air filters.

[0008] The present invention was made to solve the above-mentioned problems, with the aim of providing a railway compression device that can improve the durability of the compressor.

[0009] Solution for solving the problem

[0010] As a solution to the above problems, the present invention has the following structure.

[0011] (1) The railway compression device according to the present invention comprises: an oil-free compressor that compresses and outputs air that is drawn in; a first filter disposed in the air intake path of the air drawn in to the compressor and using fibers to capture dust drawn in to the air intake path; and a second filter disposed in the air intake path and using electricity or magnetism to capture the dust.

[0012] According to this structure, by incorporating a second filter that uses electricity or magnetism to capture dust, fine dust that is difficult to capture using only fibers can be effectively captured. Therefore, the durability of the compressor can be improved.

[0013] (2) According to the railway compression device described in (1) above, the second filter may also be configured to capture the dust by electrostatic force and be positioned downstream of the first filter in the air intake direction.

[0014] (3) The railway compression device according to (1) or (2) above may also include a housing that houses the compressor and is open in one direction, wherein the first filter and the second filter are located in front of the compressor in that direction.

[0015] (4) According to any one of (1) to (3) above, the railway compression device may also include a support plate that supports the compressor from the lower side in the vertical direction and extends horizontally, and the second filter is disposed at a position lower in the vertical direction than the support plate.

[0016] (5) According to any one of (1) to (4) above, the railway compression device may also include a control room box that houses the control unit of the compressor in the middle of the air intake path.

[0017] (6) According to the railway compression device described in (5) above, the compressor may be positioned downstream of the control room box in the air intake direction, and the second filter may be positioned between the control room box and the compressor.

[0018] (7) The railway compression device described in any one of (1) to (6) above may also be a scroll compressor.

[0019] The effects of the invention

[0020] According to the present invention, the durability of the compressor can be improved. Attached Figure Description

[0021] Figure 1 This is a schematic structural diagram of the railway compression device according to the first embodiment.

[0022] Figure 2 From Figure 1 The diagram observed from the perspective of view II.

[0023] Figure 3 This is an explanatory diagram of the first filter in the first embodiment.

[0024] Figure 4 This is an explanatory diagram of the second filter in the first embodiment.

[0025] Figure 5 This is a schematic structural diagram of the railway compression device according to the second embodiment.

[0026] Figure 6 This is a perspective view of the filter structure according to the third embodiment.

[0027] Figure 7 This is a schematic structural diagram of the railway compression device according to the fourth embodiment.

[0028] Figure 8 This is a schematic diagram of the second filter in the fourth embodiment.

[0029] Figure 9 This is a diagram showing the relationship between the start signal of the compressor and the on / off state of the electromagnet in the fourth embodiment.

[0030] Explanation of reference numerals in the attached figures

[0031] 1. Railway compression device; 2. Compressor; 3. Air intake path; 5. First filter; 6. Second filter; 20. Housing; 21. Support plate; 40. Control room box; 201. Railway compression device; 206. Second filter; 401. Railway compression device; 406. Second filter. Detailed Implementation

[0032] Hereinafter, a railway compression device according to an embodiment of the present invention will be described with reference to the accompanying drawings. For example, the railway compression device can be used as a compressed air source for railway vehicle brakes, air springs, etc. In the following description, expressions such as "parallel," "orthogonal," "center," and "coaxial," indicating relative or absolute configurations, not only mean a strictly precise configuration, but also include states of relative displacement by angle or distance with tolerances, achieving the same function. In the accompanying drawings used in the following description, the scale of each component has been appropriately altered to make each component identifiable in size.

[0033] <Railway Compression Device>

[0034] Figure 1 This is a schematic structural diagram of the railway compression device 1 according to the first embodiment. Figure 2 From Figure 1 The diagram observed from the perspective of view II. Figure 3 This is an explanatory diagram of the first filter 5 in the first embodiment. Figure 4 This is an explanatory diagram of the second filter 6 in the first embodiment.

[0035] Refer to together Figures 1-4 The railway compression device 1 includes: an oil-free compressor 2 that compresses the intake air and outputs it; a first filter 5 disposed in the air intake path 3 of the compressor 2, which uses fibers to capture dust drawn into the air intake path 3; and a second filter 6 disposed in the air intake path 3, which uses electricity to capture dust.

[0036] The compressor 2 in this embodiment is a scroll type. The scroll type (not shown) comprises a fixed scroll plate and a rotating scroll plate. Each of the fixed and rotating scroll plates has a scroll-shaped coil on one side of a circular end plate. The fixed and rotating scroll plates are positioned opposite each other with the coils engaged. When the rotating scroll plate revolves relative to the fixed scroll plate while they are facing each other, gas is drawn in from the outermost circumference of the coil. The drawn-in gas fills the compression chamber between the two scroll plates, and the volume of the compression chamber decreases as the rotating scroll plate rotates, thereby compressing the gas. The compressed gas is ejected from a port located at the center of the end plate.

[0037] Top seals are provided at the top of the scroll rings of both the fixed scroll and the rotating scroll. Compressed gas is introduced into the sealing groove housing the top seal. The top seal seals the gap between the scroll ring and the end plate by pressing against the end plate using the back pressure generated by the compressed gas.

[0038] The railway compressor 1 includes an electric motor 7 that imparts rotational force to a rotating scroll plate. The electric motor 7 is composed of a stator and a rotor. The electric motor 7 outputs rotational force by energizing the stator and causing the rotor to rotate. In this embodiment, it is a belt-type compressor 2 that transmits the power (rotor rotational force) of the electric motor 7 to the compressor 2 via a belt 10.

[0039] The drive pulley 11 is coupled to the output shaft of the rotor. The driven pulley 12 is coupled to the rotating shaft of the compressor 2 (e.g., a shaft with an eccentric pin on the side of the rotary scroll). A tensioner 13 for adjusting the tension of the belt 10 is provided between the drive pulley 11 and the driven pulley 12. The belt 10 is supported by the drive pulley 11, the driven pulley 12, and the tensioner 13. The rotational force of the rotor is transmitted to the rotating shaft of the compressor 2 via the belt 10. Due to the rotational force of the rotor, the compressor 2 draws in air between the fixed scroll and the rotary scroll (compression chamber) and ejects the compressed air in the compression chamber.

[0040] Furthermore, the power transmission method from the electric motor 7 to the compressor 2 is not limited to belt drive; it can also be an integrated type or a coupling type. In the integrated type, the compressor and the electric motor are integrated (the rotating shaft of the compressor is directly connected to the output shaft of the electric motor) on the same shaft. In the coupling type, the compressor and the electric motor are integrated (the rotating shaft of the compressor is connected to the output shaft of the electric motor using a coupling). The power transmission method from the electric motor 7 to the compressor 2 can be changed according to design specifications.

[0041] The railway compressor unit 1 includes a housing 20 that houses the compressor 2 and the electric motor 7. The housing 20 is constructed by including a support plate 21, which supports the compressor 2 from the lower side in the vertical direction and extends horizontally. The electric motor 7 is positioned at a position lower in the vertical direction than the support plate 21. For example, the electric motor 7 may also be suspended and fixed to the support plate 21.

[0042] In the following description, an orthogonal coordinate system of X, Y, and Z will be used as needed. The X direction corresponds to the width direction of the shell 20. The Y direction corresponds to the depth direction of the shell 20. The Z direction corresponds to the height direction, which is orthogonal to both the width direction (X direction) and the depth direction (Y direction) of the shell 20. In the following description, the side with the arrow in the X, Y, and Z directions will be designated as the positive (+) side, and the side opposite to the arrow will be designated as the negative (-) side. The +Z side corresponds to the upper vertical direction, and the -Z side corresponds to the lower vertical direction.

[0043] The railway compressor 1 includes a flexible pipe 30 that forms an air intake path 3 for drawing air into the compressor 2. The flexible pipe 30 extends around the compressor 2 and the motor 7 while bending in various directions. The flexible pipe 30 may also be configured to include multiple pipes and fittings. The shape of the flexible pipe 30 (e.g., direction of extension, configuration) is not limited to the above-described shape and can be changed according to design specifications.

[0044] For example, the first filter 5 is composed of a glass fiber filter, a synthetic fiber filter, a non-woven fabric filter, etc. In addition, the configuration of the first filter 5 is not limited to the above configurations. As long as the fibers are used to capture the dust drawn into the air intake path 3, various structures can be adopted, and the configuration can be changed according to the design specifications.

[0045] The first filter 5 is positioned upstream of the compressor 2 in the air intake direction. Figure 1 In the diagram, a hollow arrow indicates the direction of air intake. The first filter 5 is located at the upstream end (inlet side) of the duct hose 30. The first filter 5 can also be located within the first housing 31, which communicates with the inlet of the duct hose 30. A portion of the dust drawn into the air intake path 3 is captured by the fibers of the first filter 5 (see reference). Figure 3 ).

[0046] The second filter 6 in this embodiment uses electrostatic force to capture dust. For example, the second filter 6 is composed of an electrostatic filter with static electricity, or a charged filter material with chemical fibers that have been treated with electricity. Furthermore, the configuration of the second filter 6 is not limited to the above configuration. As long as it uses electricity to capture dust, various structures can be adopted, and it can be modified according to design specifications.

[0047] The second filter 6 is positioned downstream of the first filter 5 in the air intake direction. The second filter 6 is installed on the portion of the duct hose 30 extending from downstream of the first filter 5 (the +X side and -Z side portion of the first housing 31) towards the -X and -Z directions. The second filter 6 may also be installed within a second housing 32 connected to a portion of the duct hose 30 (the -X and -Z side portion). Dust passing through the first filter 5 is captured by the electrostatic force of the second filter 6 (see reference). Figure 4 ).

[0048] A cover 33 covering the first box 31 and the second box 32 may also be provided on the -X side of the housing 20. A dust filter 34 may also be provided on the -X side of the cover 33. The first filter 5 may also be positioned downstream of the dust filter 34 in the air intake direction.

[0049] In this embodiment, the housing 20 is configured to open in one direction (equivalent to the -X direction). Figure 2 This diagram represents a view from the -X direction of the railway compressor unit 1 with the cover 33 removed. The first filter 5 and the second filter 6 are located forward of the compressor 2 in the -X direction. The first filter 5 and the second filter 6 are located on the -X side of the compressor 2. Viewed from the -X direction, at least a portion of the compressor 2 does not overlap with the first filter 5 and the second filter 6, respectively. Viewed from the -X direction, a portion of the compressor 2 (the portion on the -Y side) overlaps with the first filter 5. Viewed from the -X direction, the entire compressor 2 does not overlap with the second filter 6.

[0050] The portion of the air intake path 3 upstream of the first filter 5 is positioned vertically upward of the support plate 21. The first filter housing 31 is positioned vertically upward of the support plate 21. The second filter 6 is positioned vertically downward of the support plate 21. The second filter housing 32 is positioned vertically downward of the support plate 21.

[0051] The railway compressor unit 1 also includes a control compartment 40 that houses the control unit (not shown) of the compressor 2. The control compartment 40 is located midway through the air intake path 3. An air inlet 41 and an air outlet 42 leading to the air intake path 3 are formed in the control compartment 40.

[0052] For example, the control unit includes a processor such as a CPU (Central Processing Unit) and memory connected via a bus. The processor reads the pressure control program stored in a memory unit (not shown) and stores the read pressure control program in the memory. The processor executes the pressure control program stored in the memory.

[0053] The control chamber 40 is formed into a rectangular box shape. The control chamber 40 is disposed adjacent to the +X side portion of the housing 20. The air inlet 41 leading to the air intake path 3 opens in the X direction at the -X side and -Z side portion of the control chamber 40. The air outlet 42 leading to the air intake path 3 opens in the X direction at the -X side and +Z side portion of the control chamber 40. The control chamber 40 is located on the portion of the pipe hose 30 extending from downstream of the second filter 6 (the +X side portion of the second housing 32) towards the +X direction (air inlet 41).

[0054] The compressor 2 is positioned downstream of the control chamber 40 in the air intake direction. The compressor 2 (air intake port omitted in the diagram) is located on the portion of the pipe hose 30 extending in the -X and +Z side of the control chamber 40 (the opening portion of the outlet 42) in the -X direction. Alternatively, an equipment compartment 50 housing pressure switches and safety valves may be installed on the +Z side of the control chamber 40.

[0055] <Effects>

[0056] As described above, the railway compression device 1 of this embodiment includes: an oil-free compressor 2 that compresses and outputs the intake air; a first filter 5 disposed in the air intake path 3 of the air intake to the compressor 2, which uses fibers to capture dust drawn into the air intake path 3; and a second filter 6 disposed in the air intake path 3, which uses electricity to capture dust.

[0057] According to this structure, by having a second filter 6 that uses electricity to capture dust, it is possible to effectively capture fine dust (such as iron powder and other metal powders that affect the lifespan of the oil-free compressor 2) that is difficult to capture using only fiber capture. Therefore, the durability of the compressor can be improved.

[0058] The railway environment is a dusty environment with a high amount of iron powder, so it can effectively capture iron powder.

[0059] In the railway compression device 1 of this embodiment, the second filter 6 uses electrostatic force to capture dust and is positioned downstream of the first filter 5 in the air intake direction.

[0060] According to this structure, coarse dust can be captured by the upstream first filter 5, thus extending the life of the second filter 6.

[0061] Compared to a configuration where the second filter 6 is positioned upstream of the first filter 5, dust clogging of the second filter 6 can be reduced. Therefore, the pressure difference across the second filter 6 in the intake direction can be prevented from becoming excessive.

[0062] In the railway compressor device 1 of this embodiment, a housing 20 is also provided, which houses the compressor 2 and is open in one direction. The first filter 5 and the second filter 6 are located in front of the compressor 2 in the aforementioned direction.

[0063] According to this structure, the compressor 2 does not become an obstruction when performing maintenance and repairs on the first filter 5 and the second filter 6 from the front in the aforementioned direction. Therefore, maintenance and repair of the first filter 5 and the second filter 6 become easy.

[0064] The railway compressor 1 of this embodiment also includes a support plate 21, which supports the compressor 2 from the lower side in the vertical direction and extends horizontally. The second filter 6 is disposed at a position lower in the vertical direction than the support plate 21.

[0065] According to this structure, the second filter 6 does not become an obstacle when the compressor 2 is disassembled or installed horizontally along the support plate 21. Therefore, maintenance and repair of the compressor 2 become easy.

[0066] The railway compressor 1 of this embodiment also includes a control room box 40 for housing the control unit of the compressor 2 in the middle of the air intake path 3.

[0067] According to this structure, the air that enters the control chamber box 40 via the air intake path 3 can be flexibly used for cooling the control unit.

[0068] In the railway compression device 1 of this embodiment, the compressor 2 is a scroll type.

[0069] This structure can extend the lifespan of the scroll compressor 2.

[0070] <Second Implementation>

[0071] The railway compression device 201 according to the second embodiment will be described below. In the following description, parts that have the same functions as those described in the first embodiment will be labeled with the same names and reference numerals, and specific descriptions related to those functions will be omitted.

[0072] Figure 5 This is a schematic structural diagram of the railway compression device 201 according to the second embodiment.

[0073] Reference Figure 5 In the railway compressor 201 of the second embodiment, the compressor 2 is positioned downstream of the control room 40 in the air intake direction. A second filter 206 is disposed between the control room 40 and the compressor 2.

[0074] The second filter 206 is installed on the portion of the pipe hose 30 that extends in the -X direction from the downstream side (opening portion of the outlet 42) of the control room box 40. The second filter 206 may also be installed within a box connected to a portion of the pipe hose 30 (the -X side portion of the outlet 42). The second filter 206 may also be installed independently of the second filter 6 of the first embodiment. The installation configuration of the second filter 206 is not limited to the above configuration and can be changed according to design specifications.

[0075] In the railway compression device 201 of this embodiment, the compressor 2 is positioned downstream of the control room 40 in the air intake direction. The second filter 206 is disposed between the control room 40 and the compressor 2.

[0076] According to this structure, even when dust enters the control chamber 40 from the air intake passage, the second filter 206 can capture the dust exiting the control chamber 40 (outlet 42). Therefore, it is possible to suppress the inflow of dust into the compressor 2.

[0077] <Third Implementation>

[0078] The filter structure 304 of the third embodiment will be described below. In the following description, parts that have the same functions as those described in the above embodiments will be labeled with the same names and reference numerals, and specific descriptions related to those functions will be omitted.

[0079] Figure 6 This is a perspective view of the filter structure 304 according to the third embodiment.

[0080] Reference Figure 6 The filter structure 304 comprises a first cylindrical member 305 formed in a cylindrical shape and a second cylindrical member 306 formed in a cylindrical shape along the outer periphery of the first cylindrical member 305. The first cylindrical member 305 and the second cylindrical member 306 are arranged in the air intake path 3 for air drawn into the compressor 2. The first cylindrical member 305 and the second cylindrical member 306 are arranged coaxially with each other. Furthermore, the filter structure 304 is not limited to the above structure, and may also include a third cylindrical member or other multiple cylindrical members. The configuration of the filter structure 304 can be changed according to design specifications.

[0081] Either a first filter 5 or a second filter 6 is provided in the first cylindrical member 305. The other of the first filter 5 and the second filter 6 is provided in the second cylindrical member 306. The first filter 5 and the second filter 6 can be configured in the air intake path 3 into which air is drawn into the compressor 2.

[0082] <Fourth Implementation>

[0083] The railway compression device 401 according to the fourth embodiment will be described below. In the following description, parts that have the same functions as those described in the above embodiments will be labeled with the same names and reference numerals, and specific descriptions related to those functions will be omitted.

[0084] Figure 7 This is a schematic structural diagram of the railway compression device 401 according to the fourth embodiment. Figure 8 This is a schematic diagram of the second filter 406 in the fourth embodiment. Figure 9 This is a diagram showing the relationship between the start signal of the compressor 2 in the fourth embodiment and the on / off state of the electromagnet.

[0085] Refer to together Figures 7-9 In this embodiment, a second filter 406 is provided to capture dust using magnetic force. The second filter 406 is positioned upstream of the first filter 5 in the air intake direction.

[0086] The first filter 5 is positioned upstream of the compressor 2 in the air intake direction. A dehumidifier 8 for dehumidifying the compressed air output from the compressor 2 can also be installed downstream of the compressor 2. A tank 9 can also be installed downstream of the dehumidifier 8. The configuration of the dehumidifier 8 and / or tank 9 can be modified according to design specifications.

[0087] The second filter 406 of this embodiment uses electromagnetic force to capture dust. For example, the second filter 406 is configured to include an electromagnet or the like. Figure 8 In the example, the second filter 406 is constructed by winding wires around four (one or more, an example) iron cores (an example of magnetic material cores) that extend radially from the outer periphery of the annular member (an example of a support member). Furthermore, the configuration of the second filter 406 is not limited to the above-described form; various structures can be adopted as long as magnetic force is used to capture dust, and the configuration can be modified according to design specifications.

[0088] In this embodiment, the control unit (not shown) switches the electromagnetic force (e.g., the on / off state of the electromagnet) of the second filter 406 in sync with the operating signal (e.g., the start signal) of the compressor 2. For example, the electromagnet is set to be on when the start signal of the compressor 2 is on. As a result, iron powder in the intake air is attracted to the electromagnet.

[0089] On the other hand, the electromagnet is deactivated when the start signal of compressor 2 is disconnected. As a result, the iron powder adhering to the electromagnet is released to the outside due to the backflow of air generated by the release of internal pressure from compressor 2. In this embodiment, after compressor 2 stops, the electromagnetic force is disconnected, and the iron powder adhering to the electromagnet is removed. Therefore, dust removal maintenance is unnecessary.

[0090] The railway compression device 401 of this embodiment includes: an oil-free compressor 2 that compresses and outputs the intake air; a first filter 5 disposed in the air intake path 3 of the compressor 2, which captures dust drawn into the air intake path 3 by means of fibers; and a second filter 406 disposed in the air intake path 3, which captures dust by means of magnetism.

[0091] According to this structure, by having a second filter 406 that uses magnetic force to capture dust, fine dust (such as iron powder and other metal powders that affect the lifespan of the oil-free compressor 2) that is difficult to capture using only fiber capture can be effectively captured. Therefore, the durability of the compressor can be improved.

[0092] The railway environment is a dusty environment with a high amount of iron powder, so it can effectively capture iron powder.

[0093] In the railway compression device 401 of this embodiment, the second filter 406 uses electromagnetic force to capture dust and is positioned upstream of the first filter 5 in the air intake direction.

[0094] According to this structure, fine dust can be captured by the upstream second filter 406, thus extending the life of the first filter 5.

[0095] Compared to a configuration where the first filter 5 is positioned upstream of the second filter 406, dust clogging of the first filter 5 can be suppressed. Therefore, it is possible to prevent the pressure difference across the first filter 5 from becoming excessive in the intake direction.

[0096] <Variation Example>

[0097] Furthermore, the scope of protection of the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

[0098] In the above embodiments, examples have been given, but the embodiments are not limited thereto: A housing is also included, which houses the compressor and has an opening in one direction. The first filter and the second filter are located forward of the compressor in that direction. For example, the first filter and the second filter may also be located rearward of the compressor in that direction. The configuration of the first filter and the second filter relative to the compressor in that direction can be changed according to design specifications.

[0099] In the above embodiments, examples have been given, but the embodiments are not limited thereto: a support plate is also included, which supports the compressor from a vertically downward direction and extends horizontally, and the second filter is disposed at a position further downward in the vertical direction than the support plate. For example, the second filter may also be disposed at a position further upward in the vertical direction than the support plate. The configuration of the second filter relative to the support plate can be changed according to design specifications.

[0100] The railway compressor device described above is an example in which a control room housing the control unit for controlling the compressor is also provided midway through the air intake path, but this is not a limitation. For example, the control room housing may also be located in a different location from the air intake path. The configuration of the control room housing can be changed according to design specifications.

[0101] In this embodiment of the railway compressor, an example of a scroll compressor has been described, but the invention is not limited to this. For example, the compressor's compression method can also be as follows: a reciprocating type (reciprocating motion type) that compresses air by changing the volume through the reciprocating motion of a piston; a screw type (lead screw type) that compresses air by changing the volume of a threaded groove formed by the rotation of a pair of screw rotors; or a turbine type that compresses air by imparting velocity energy to the air through high-speed rotation of an impeller. The compressor's compression method can be changed according to design specifications.

[0102] Alternatively, the program for implementing the functions of the control unit in the above-described embodiments can be recorded on a computer-readable recording medium, and the computer system can read the program recorded on the recording medium and execute it for processing.

[0103] Furthermore, the term "computer system" here may also include hardware such as operating systems (OS) or peripheral devices.

[0104] In addition, "computer-readable recording media" refers to non-volatile memory devices that can be written, such as floppy disks, optical disks, ROM (Read Only Memory), and flash memory, as well as portable media such as DVDs (Digital Versatile Discs) and hard drives built into computer systems.

[0105] Furthermore, the definition of "computer-readable recording medium" also includes information processing devices that transmit programs via networks such as the Internet or communication lines such as telephone lines, and volatile memory (e.g., DRAM) within a computer system that serves as a client, which holds programs for a certain period of time.

[0106] In addition, the aforementioned program can also be transmitted from a computer system storing the program on a storage device or other means via a transmission medium, or transmitted to other computer systems using transmission waves in the transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium capable of transmitting information, such as a network (communication network) like the Internet or a communication line (communication line) like a telephone line.

[0107] Furthermore, the program described above can also be a part of a program used to implement the aforementioned functions. Moreover, the program described above can also be a so-called "difference file" (difference program) capable of implementing the aforementioned functions in combination with a program already recorded in the computer system.

[0108] Furthermore, without departing from the spirit of the invention, the constituent elements in the above embodiments can be replaced with well-known constituent elements. Additionally, the various modifications described above can also be combined.

[0109] In the embodiments disclosed in this specification, a component composed of multiple objects can either be integrated into one object, or the component composed of a single object can be divided into multiple objects. Regardless of whether they are integrated or not, they can be configured in a manner that achieves the purpose of the invention.

[0110] In the embodiments disclosed in this specification, embodiments in which multiple functions are distributed can also have some or all of the multiple functions centrally provided; conversely, embodiments in which multiple functions are centrally provided can have some or all of the multiple functions distributed. Regardless of whether the functions are centrally provided or distributed, they can be configured in a manner that achieves the purpose of the invention.

[0111]

Example

[0112] The following describes a railway compression device according to the above-described embodiments of the present invention, illustrating specific examples. Furthermore, the following examples are specific instances to which the present invention applies and are not intended to limit the scope of the invention.

[0113] Table 1 shows the evaluation results of the wear degree of the top seal of the scroll compressor. Furthermore, the power transmission method to the scroll compressor is set as belt type.

[0114] The evaluation test included a "real vehicle test," which evaluated the cases with and without an electrostatic filter.

[0115] In Table 1, “Particle Counter” indicates the number of dust particles with a size larger than 0.3 μm that passed through the compressor in 20 seconds during operation (the current vehicle's measurement is based on the ambient air upstream of the particle counter), “Collected Dust” indicates the relative values ​​(ratios) of each component of the collected dust that was analyzed using SEM-EDX, with the iron content as a baseline during the test without an electrostatic filter, and “Top Seal Wear” indicates the relative value (ratio) of the wear amount as a baseline of the wear amount of the top seal during the test without an electrostatic filter.

[0116] Table 1

[0117]

[0118] Referring to Table 1, in the on-vehicle tests, it was confirmed that the proportion of iron in the dust composition was relatively high. Furthermore, it was confirmed that the proportion of iron in the product with an electrostatic filter was lower compared to the product without an electrostatic filter. Additionally, it was confirmed that the wear of the top seal on the product with an electrostatic filter was less than that on the product without an electrostatic filter.

[0119] Based on the above, it can be seen that by installing an electrostatic filter, more iron-based particles are captured compared to the absence of one. This indicates that even in dusty environments with high iron content, iron powder can be effectively captured, improving the compressor's durability. Furthermore, it is believed that in railway environments, there is a tendency for higher iron content due to the influence of wheels and tracks; this can be efficiently captured using magnetic force.

Claims

1. A railway compression device, wherein, This railway compression device has the following features: An oil-free compressor compresses the intake air and outputs it. A first filter, disposed in the air intake path of the air drawn into the compressor, uses fibers to capture dust drawn into the air intake path; and The second filter, which is disposed in the air intake path, uses electricity or magnetism to capture the dust.

2. The railway compression device according to claim 1, wherein, The second filter uses electrostatic force to capture the dust and is positioned downstream of the first filter in the air intake direction.

3. The railway compression device according to claim 1 or 2, wherein, The railway compressor also includes a housing that houses the compressor and has an opening in one direction. The first filter and the second filter are located in front of the compressor in one direction.

4. The railway compression device according to claim 1 or 2, wherein, The railway compressor also includes a support plate that supports the compressor from a vertical downward direction and extends horizontally. The second filter is positioned below the support plate in the vertical direction.

5. The railway compression device according to claim 1 or 2, wherein, A control chamber housing the control unit that controls the compressor is also provided midway through the air intake path.

6. The railway compression device according to claim 5, wherein, The compressor is positioned downstream of the control room housing in the air intake direction. The second filter is disposed between the control room box and the compressor.

7. The railway compression device according to claim 1 or 2, wherein, The compressor is a scroll compressor.

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