Gas compressor, maintenance management method for component therefor, and component maintenance management system

Abstract

Provided is a technology that enables estimating and managing times for maintenance of gas-compressor CBM components. An oil-free screw compressor 100 is provided with: a temperature detector 122 that measures a second-stage suction temperature TS2 that is the temperature of air discharged from an intercooler 104; a control device 119 that estimates, on the basis of the second-stage suction temperature TS2, a time for maintenance of the intercooler 104; and a display unit 123. The control device 119 displays, on the display unit 123, an operation time remaining until maintenance.

Description

Gas compressor, and its parts maintenance management method and parts maintenance management system

[0001] The present invention relates to a gas compressor, and a parts maintenance management method and system therefor.

[0002] Maintenance of each part of a gas compressor is generally carried out using a method called TBM (Time Based Maintenance), in which the equipment is maintained within a preset period of time, or a method called CBM (Condition Based Maintenance), in which the condition of the equipment is measured and monitored to detect signs of an abnormality and perform maintenance accordingly.

[0003] Maintenance of parts that are subject to TBM (hereinafter referred to as "TBM parts") is generally carried out at the same time, once every one to several years. On the other hand, maintenance of parts that are subject to CBM (hereinafter referred to as "CBM parts") is carried out depending on the condition of the parts, but from the perspective of maintenance costs, it is desirable to carry out maintenance at the same time as maintenance of TBM parts.

[0004] As a technology for managing the maintenance timing of parts, Patent Document 1 describes a technique for requesting maintenance of a part based on the arrival of a first maintenance interval that is not related to the actual utilization of the device, and based on the arrival of the first maintenance interval, determining whether a second maintenance interval that is associated with the actual utilization of the device has been reached, and if the second maintenance interval has not been reached, temporarily prohibiting the maintenance request and extending the first maintenance interval.

[0005] Japanese Patent Application Laid-Open No. 2001-326150

[0006] In the component maintenance management system described in Patent Document 1, the first maintenance interval can be appropriately extended by referring to a first maintenance interval that is set regardless of actual equipment operation and a second maintenance interval that is set based on actual equipment operation.

[0007] However, in Patent Document 1, the operation of the device associated with the second maintenance interval is, depending on the part, the actual operating time of the device, the travel distance, the number of times of operation, etc., but these do not indicate the state of each part. Furthermore, Patent Document 1 does not disclose how to grasp the state of the parts and manage the maintenance timing of CBM parts that can be estimated from the state of the parts.

[0008] Therefore, an object of the present invention is to provide a technology that can estimate and manage the maintenance timing of CBM parts of a gas compressor.

[0009] In order to solve the above problem, a representative gas compressor of the present invention is a gas compressor that compresses air, and is equipped with an acquisition unit that acquires the status of parts of the gas compressor, a processing unit that estimates the maintenance timing of the parts based on the status, and a display unit, and the processing unit displays the estimated maintenance timing on the display unit.

[0010] According to the present invention, it is possible to estimate and manage the maintenance timing of CBM parts of a gas compressor.

[0011] Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments.

[0012] FIG. 1 is a diagram illustrating an example of the configuration of a compressor according to a first embodiment. FIG. 2 is an example of a block diagram illustrating an example of the hardware configuration of a server according to the first embodiment. FIG. 3 is a graph illustrating an example of the relationship between the wear level F of a part and the period t according to the first embodiment. FIG. 4 is a diagram illustrating an example of a message displayed on the display unit according to the first embodiment. FIG. 5 is a diagram illustrating an example of the configuration of a compressor according to a second embodiment. FIG. 6 is a graph illustrating an example of the relationship between the wear level F of a part and the period t according to the second embodiment. FIG. 7 is a graph illustrating an example of the relationship between the wear level F of a part and the period t according to the second embodiment. FIG. 8 is a diagram illustrating an example of a message displayed on the display unit according to the second embodiment. FIG. 9 is a graph illustrating an example of the relationship between the wear level F of a part and the period t according to the third embodiment. FIG. 10 is a diagram illustrating an example of a message displayed on the display unit according to the third embodiment.

[0013] Hereinafter, an embodiment will be described with reference to the drawings.

[0014] FIG. 1 is a diagram illustrating an example of a configuration of a compressor according to a first embodiment.

[0015] The oil-free screw compressor 100 of this embodiment has a low-pressure stage compressor body 101 and a high-pressure stage compressor body 102. A filter 103 is attached to the suction flow path of the low-pressure stage compressor body 101 to filter ambient air and supply it to the low-pressure stage compressor body 101, and a suction port 103A is formed downstream of this filter 103, and a suction throttle valve 126 is formed downstream of this suction port 103A.

[0016] An intercooler 104 is provided between the discharge side of the low-pressure stage compressor body 101 and the suction side of the high-pressure stage compressor body 102, and this intercooler 104 is connected to the low-pressure stage compressor body 101 by an air pipe 105 and to the high-pressure stage compressor body 102 by an air pipe 106. Downstream of the high-pressure stage compressor body 102, an aftercooler 108 is connected by air pipe 109 via a check valve 107.

[0017] A temperature detector 122 that measures the temperature of the air discharged from the intercooler 104 and a pressure detector 118 that measures the pressure of the air discharged from the intercooler 104 are attached to the air pipe 106. The temperature detected by the temperature detector 122 and the pressure detected by the pressure detector 118 are input to a control device 119.

[0018] A low-pressure stage air release pipe 110 and a low-pressure stage air release pipe 111 each branch off from the middle of an air pipe 105 connecting the low-pressure stage compressor body 101 and the intercooler 104. A low-pressure stage air release two-way valve 112 is provided in the low-pressure stage air release pipe 110, and a low-pressure stage air release two-way valve 113 is provided in the low-pressure stage air release pipe 111.

[0019] Similarly, a high-pressure stage air release pipe 114 and a high-pressure stage air release pipe 115 each branch off from an air pipe 109 connecting the high-pressure stage compressor body 102 and the aftercooler 108, upstream of the check valve 107. A high-pressure stage air release two-way valve 116 is provided in the high-pressure stage air release pipe 114, and a high-pressure stage air release two-way valve 117 is provided in the high-pressure stage air release pipe 115.

[0020] A discharge air pipe 120 is provided downstream of the aftercooler 108 in order to supply the compressed air cooled by the aftercooler 108 to the user side. A pressure detector 121 is attached midway along this discharge air pipe 120 to measure the pressure of the compressed air discharged from the oil-free screw compressor 100. The pressure detected by the pressure detector 121 is input to a control device 119. The input value input to the control device 119 is subjected to arithmetic processing by the control device 119, and a message corresponding to the processing and the remaining operating time until maintenance, etc., is displayed on a display unit 123.

[0021] The control device 119 may be communicably connected to the network cloud 125 via the antenna 124. In this embodiment, an example will be described in which arithmetic processing and display corresponding to the processing are executed by the control device 119 and the display unit 123, but it may also be configured such that the control device 119 is communicably connected to the network cloud 125 via the antenna 124, and instructions for arithmetic processing and display content are executed by a server 300 ( FIG. 2 ) on the network cloud 125, and displayed on the display unit 123, or the display unit of the server 300 ( FIG. 2 ) may be displayed. Although the antenna 124 is used as an example of the communication means in FIG. 1, other wired or wireless communication means may also be used.

[0022] FIG. 2 is a block diagram illustrating an example of a hardware configuration of a server according to the first embodiment.

[0023] The server 300 is a server or computer configured by interconnecting a CPU (Central Processing Unit) 201 , a memory 302 , a storage device 303 , a communication unit 304 , an input unit 305 , and an output unit 306 via a bus 307 .

[0024] The CPU 201 is a central processing unit that implements necessary functions by executing programs stored in the memory 302 (or storage device 303). The memory 302 is a main storage device used by the CPU 201 when executing processing, and is composed of volatile storage elements such as RAM (Random Access Memory). The storage device 303 is an auxiliary storage device for storing input data provided to the CPU 201 and output data output from the CPU 201, and is composed of non-volatile storage elements such as an HDD (Hard Disk Drive) or SSD (Solid State Drive).

[0025] The communication unit 304 is an interface used by the server 300 to communicate with external devices, and is configured with a network interface card (NIC) etc. The communication unit 304 is connected to a network (e.g., the Internet) and communicates with external devices via the network.

[0026] The input unit 305 is an interface that accepts input from the user and is composed of a keyboard, touch panel, card reader, voice input device, etc. The output unit 306 is an interface that outputs data to the operator and is composed of a display, speaker, printer, etc. The bus 307 is an internal communication path of the server 300.

[0027] An example of grasping the condition of components and estimating the maintenance timing in the oil-free screw compressor 100 of this embodiment will be described below.

[0028] 3 is a graph showing an example of the relationship between the wear level F of a part and the period t in Example 1. The part to be maintained in this example is the intercooler 104.

[0029] In FIG. 3, the date of introduction of the oil-free screw compressor 100 is set as the reference date, and one year has passed since the reference date.

[0030] If the intercooler 104 is a TBM part, it normally requires annual maintenance, but as a CBM part, it is possible to estimate the maintenance timing based on the wear rate ΔF of the intercooler 104 over a period Δt. The wear rate of the intercooler 104 mainly depends on the wear rate of the cooling fins inside the intercooler 104.

[0031] The wear rate ΔF of the intercooler 104 is calculated based on the two-stage intake temperature T 104 , which is the temperature of the air discharged from the intercooler 104 detected by the temperature detector 122. Ｓ２ The method for calculating the wear rate ΔF of the intercooler 104 will be described below.

[0032] The second-stage intake temperature T detected by the temperature detector 122 Ｓ２ If the temperature has changed from 10°C to 15°C in the year from the reference date to the present, the control device 119 calculates the two-stage suction temperature increase value ΔT Ｓ２ The calculation is: =15-10=5.

[0033] Next, the two-stage intake temperature rise value ΔT that requires maintenance Ｓ２Ｃ is 20K (=20 deg), the control device 119 calculates the wear rate ΔF=ΔT Ｓ２ / ΔT Ｓ２Ｃ = 5 / 20 = 0.25. The temperature rise value ΔT of the second stage intake that requires maintenance Ｓ２Ｃ is registered in advance in the control device 119. Since one year has passed since the reference date, the control device 119 calculates the period Δt=1.

[0034] A method for estimating the timing of maintenance of the intercooler 104 from the calculation results of the control device 119 will be described with reference to the graph in Figure 3. The vertical axis of the graph represents the wear level F, the horizontal axis represents the period t, and the solid line represents ΔF / Δt. The wear level at which the intercooler 104 requires maintenance is set to 1, and the wear level at which the intercooler 104 will be damaged is set to 1.2.

[0035] The relationship between the wear rate ΔF calculated by the control device 119 and the period Δt is shown by the dotted line in Figure 3. From the dotted line in Figure 3, it is estimated that the wear rate F will reach 1 two years or more after the reference date. The control device 119 calculates the remaining operating time until maintenance is required based on the graph in Figure 3, and displays a message on the display unit 123.

[0036] 4 is a diagram showing an example of a message displayed on the display unit 123 according to the first embodiment. As shown in FIG. 4, the MSG 127 displays, for example, the part name "intercooler," the remaining operation time until maintenance "12000 hours," and a work instruction to the user to extend the maintenance period "clean or improve the surrounding environment." The work instruction to the user is registered in advance in the control device 119 for each part.

[0037] By checking MSG 127, the user can decide to postpone the maintenance scheduled for one year from the base date and postpone it to two years from the base date, thereby reducing the number of maintenance sessions and maintenance costs.

[0038] In this embodiment, an example has been described in which the calculation processing and the display corresponding to the processing are executed by the control device 119 and the display unit 123, but it is also possible to configure the device to be communicatively connected to the network cloud 125 via the antenna 124, and to execute the calculation processing and instructions for the display content on the server 300 (Figure 2) on the network cloud 125, and display them on the display unit 123, or to display them on the display unit of the server 300 (Figure 2).

[0039] In this case, the control device 119 detects the two-stage suction temperature T Ｓ２ to the server 300 via the antenna 124. The CPU 201 performs the same calculation as the control device 119 described above, and displays the MSG 127 on the display unit 123. The CPU 201 may also display the MSG 127 on the display unit of the server 300.

[0040] According to this embodiment, the control device 119 detects the two-stage suction temperature T Ｓ２The maintenance timing of the intercooler 104 is estimated based on the above and the remaining operating time until maintenance is displayed on the display unit 123, so that the maintenance timing of the CBM parts of the gas compressor can be estimated and managed.

[0041] FIG. 5 is a diagram illustrating an example of a configuration of a compressor according to the second embodiment.

[0042] The oil-lubricated screw compressor 200 of this embodiment has a compressor body 201. An intake filter 202 is attached to the intake passage of the compressor body 201 to filter ambient air and supply it to the compressor body 201, and an intake throttle valve 203 is formed downstream of this intake filter 202.

[0043] A pressure detector 206 is attached to the suction filter 202 to measure the pressure inside the suction filter 202. The pressure detected by the pressure detector 206 is input to a control device 207. The input value input to the control device 207 is subjected to arithmetic processing by the control device 207, and a message according to the processing and the remaining operating time until maintenance are displayed on a display unit 208.

[0044] The control device 207 may be communicably connected to the network cloud 210 via the antenna 209. In this embodiment, an example will be described in which arithmetic processing and display corresponding to the processing are executed by the control device 207 and the display unit 208, but it may also be configured such that the control device 207 is communicably connected to the network cloud 210 via the antenna 209, and instructions for arithmetic processing and display content are executed by a server 300 ( FIG. 2 ) on the network cloud 210 and displayed on the display unit 208, or such instructions may be displayed on the display unit of the server 300 ( FIG. 2 ). Although the antenna 209 is used as an example of communication means in FIG. 1, other wired or wireless communication means may also be used.

[0045] An oil separation tank 204 for separating the gas-liquid mixture of compressed air and oil is provided on the discharge side of the compressor body 201, and an aftercooler 205 for cooling the compressed air is provided downstream of the oil separation tank 204.

[0046] The control device 207 incorporates an electrolytic capacitor, not shown.

[0047] An example of grasping the condition of parts and estimating the maintenance timing in the oil-injected screw compressor 200 of this embodiment will be described below.

[0048] 6 is a graph showing an example of the relationship between the wear level F of a part and the period t in Example 2. The part to be maintained in this example is the intake filter 202.

[0049] In FIG. 6, the date of introduction of the oil-injected screw compressor 200 is set as the reference date, and six months have passed since the reference date.

[0050] The intake filter 202, when used as a TBM part, normally requires annual maintenance, but as a CBM part, it is possible to estimate the maintenance timing based on the wear level ΔF of the intake filter 202 over a period Δt. The wear level of the intake filter 202 mainly depends on the clogging of the intake filter.

[0051] The wear rate ΔF of the suction filter 202 is calculated based on the suction pressure P Ｓ The method for calculating the wear level ΔF of the suction filter 202 will be described below.

[0052] The suction pressure P detected by the pressure detector 206 Ｓ has changed from −1.5 kPa to −3.5 kPa in the six months from the reference date to the present, the control device 207 calculates the suction pressure decrease value ΔP Ｓ The calculation is: =-3.5-(-1.5)=-2.

[0053] Next, the suction pressure drop ΔP that requires maintenance ＳＣ is set to -4, the control device 207 calculates the wear rate ΔF=ΔP Ｓ / ΔP ＳＣ = -2 / -4 = 0.5. Suction pressure drop ΔP that requires maintenance ＳＣ is registered in advance in the control device 207. Since six months have passed since the reference date, the control device 207 calculates the period Δt=0.5.

[0054] A method for estimating the maintenance timing of the suction filter 202 from the calculation results of the control device 207 will be described with reference to the graph in Fig. 6. The vertical axis of the graph represents the wear level F, the horizontal axis represents the period t, and the solid line represents ΔF / Δt. The wear level at which the suction filter 202 requires maintenance is set to 1, and the wear level at which the suction filter 202 will be damaged is set to 1.2.

[0055] The relationship between the wear rate ΔF calculated by the control device 207 and the period Δt is shown by the dotted line in Figure 6. From the dotted line in Figure 6, it is estimated that the wear rate F will reach 1 within one year from the reference date. The control device 207 calculates the remaining operating time until maintenance is required based on the graph in Figure 6, and displays a message on the display unit 208.

[0056] 7 is a diagram showing an example of a message displayed on the display unit 208 in the second embodiment. As shown in Fig. 7, the MSG 211 displays, for example, the part name "suction filter," the remaining operation time until maintenance "4000 hours," and a work instruction to the user to extend the maintenance period "clean or improve the surrounding environment." The work instruction to the user is registered in advance in the control device 207 for each part.

[0057] By checking MSG 211, the user can determine whether maintenance is necessary without waiting for the maintenance due one year after the reference date, thereby enabling maintenance to be performed at an appropriate time depending on the condition of the parts.

[0058] Next, the method for calculating the wear level ΔF of the suction filter 202 during the period Δt when the user performs work to extend the maintenance interval, such as improving the surrounding environment, cleaning parts, changing the set pressure, or changing the operating method, in accordance with the work instructions in MSG 211, is shown below.

[0059] FIG. 8 is a graph showing an example of the relationship between the wear level F of a part and the period t in the second embodiment.

[0060] In FIG. 8, the reference date is set to six months after the introduction date of the oil-injected screw compressor 200, and six months have passed since the reference date.

[0061] The user cleaned the suction filter 202 or improved the surrounding environment of the oil-lubricated screw compressor 200 after the reference date, and the suction pressure P detected by the pressure detector 206 Ｓ has changed from −3.5 kPa to −5 kPa in the six months from the reference date to the present, the control device 207 calculates the suction pressure decrease value ΔP Ｓ The calculation is: = -5 - (-3.5) = -1.5.

[0062] Next, the suction pressure drop ΔP that requires maintenance ＳＣ is set to -4, the control device 207 calculates the wear rate ΔF=ΔP Ｓ / ΔP ＳＣ = -1.5 / -4 = 0.375. Suction pressure drop ΔP that requires maintenance ＳＣ is registered in advance in the control device 207. Since six months have passed since the reference date, the control device 207 calculates the period Δt=0.5.

[0063] A method for estimating the maintenance timing of the suction filter 202 from the calculation results of the control device 207 will be described with reference to the graph in Fig. 8. The vertical axis of the graph represents the wear level F, the horizontal axis represents the period t, and the solid line represents ΔF / Δt. The wear level at which the suction filter 202 requires maintenance is set to 1, and the wear level at which the suction filter 202 will be damaged is set to 1.2.

[0064] The relationship between the wear rate ΔF calculated by the control device 207 and the period Δt is shown by the dotted line in Figure 8. From the dotted line in Figure 8, it is estimated that the wear rate F will reach 1 one year or more after the installation date. The control device 207 calculates the remaining operating time until maintenance is required based on the graph in Figure 8, and displays a message on the display unit 208.

[0065] 9 is a diagram showing an example of a message displayed on the display unit 208 in the second embodiment. As shown in Fig. 9, the MSG 212 displays, for example, the part name "suction filter," the remaining operation time until maintenance "8000 hours," and a work instruction to the user to extend the maintenance period "clean or improve the surrounding environment." The work instruction to the user is registered in advance in the control device 207 for each part.

[0066] By checking MSG 211, the user can determine that regular maintenance should be performed one year after the installation date, thereby reducing the number of maintenance times and maintenance costs.

[0067] In this embodiment, an example will be described in which the calculation processing and the display corresponding to the processing are executed by the control device 207 and the display unit 208, but it is also possible to configure the device to be communicably connected to the network cloud 210 via the antenna 209, and to execute the calculation processing and instructions for the display content on the server 300 (Figure 2) on the network cloud 210, and display them on the display unit 208, or to display them on the display unit of the server 300 (Figure 2).

[0068] In this case, the control device 207 detects the suction pressure P Ｓ to the server 300 via the antenna 209. The CPU 201 performs the same calculation as the control device 207 and displays the MSG 211 on the display unit 208. The CPU 201 may also display the MSG 211 on the display unit of the server 300.

[0069] According to this embodiment, the control device 207 detects the suction pressure P Ｓ The maintenance timing of the suction filter 202 is estimated based on the above and the remaining operating time until maintenance is displayed on the display unit 208, so that the maintenance timing of the CBM parts of the gas compressor can be estimated and managed.

[0070] In addition, the control device 207 displays work instructions to the user on the display unit 208 to extend the maintenance period, so that by having the user carry out the work, the number of maintenance operations can be reduced and maintenance costs can be reduced.

[0071] The configuration of the compressor according to the third embodiment is similar to that shown in FIG.

[0072] 10 is a graph showing an example of the relationship between the wear level F of a part and the period t in Example 3. The part to be maintained in this example is an electrolytic capacitor incorporated in the control device 207.

[0073] In FIG. 10, the date of introduction of the oil-injected screw compressor 200 is set as the reference date, and it is assumed that eight years have passed since the reference date.

[0074] When an electrolytic capacitor is used as a TBM part, it normally requires maintenance every eight years. However, as a CBM part, it is possible to estimate the maintenance timing based on the wear rate ΔF of the electrolytic capacitor over a period Δt.

[0075] Since the degree of consumption of the electrolytic capacitor mainly depends on the time of current application, the degree of consumption ΔF of the electrolytic capacitor can be calculated from the time tE of current application of the electrolytic capacitor recorded in the control device 207. The method for calculating the degree of consumption ΔF of the electrolytic capacitor is described below.

[0076] The current application time t recorded in the control device 207 Ｅ is proportional to the operating time of the oil-injected screw compressor 200, and if the energization time from the reference date to the present is 42,000 hours, the control device 207 calculates the energization time Δt Ｅ = 42000.

[0077] Next, the current application time Δt that requires maintenance ＥＣ is set to 48000, the control device 207 calculates the wear rate ΔF=Δt Ｅ / Δt ＥＣ = 42000 / 48000 = 0.875. The power-on time Δt that requires maintenance ＥＣ is registered in advance in the control device 207. Since eight years have passed since the reference date, the control device 207 calculates that the period Δt=8.

[0078] A method for estimating the timing of electrolytic capacitor maintenance from the calculation results of control device 207 will be described with reference to the graph in Fig. 10. The vertical axis of the graph represents wear level F, the horizontal axis represents time period t, and the solid line represents ΔF / Δt. The wear level at which electrolytic capacitor maintenance is required is set to 1, and the wear level at which the electrolytic capacitor is damaged is set to 1.2.

[0079] The relationship between the wear level ΔF calculated by the control device 207 and the period Δt is shown by the dotted line in Figure 10. From the dotted line in Figure 10, it is estimated that the wear level F will reach 1 after 9 years from the reference date. The control device 207 calculates the remaining operating time until maintenance is required based on the graph in Figure 10, and displays a message on the display unit 208.

[0080] 11 is a diagram showing an example of a message displayed on the display unit 208 in the third embodiment. As shown in Fig. 11, the MSG 213 displays, for example, the part name "electrolytic capacitor," the remaining operation time until maintenance "12000 hours," and a work instruction to the user to extend the maintenance period "improve the surrounding environment." The work instruction to the user is registered in advance in the control device 207 for each part.

[0081] By checking MSG 213, the user can decide to postpone the maintenance eight years from the reference date and postpone it to nine years from the reference date, thereby reducing the number of maintenances and maintenance costs.

[0082] In this embodiment, an example will be described in which the calculation processing and the display corresponding to the processing are executed by the control device 207 and the display unit 208, but it is also possible to configure the device to be communicably connected to the network cloud 210 via the antenna 209, and to execute the calculation processing and instructions for the display content on the server 300 (Figure 2) on the network cloud 210, and display them on the display unit 208, or to display them on the display unit of the server 300 (Figure 2).

[0083] In this case, the control device 207 transmits the energization time tE of the electrolytic capacitor to the server 300 via the antenna 209. The CPU 201 performs the same calculation as the control device 207 described above, and displays the MSG 213 on the display unit 208. The CPU 201 may also display the MSG 213 on the display unit of the server 300.

[0084] According to this embodiment, the control device 207 estimates the maintenance timing of the electrolytic capacitor based on the current flow time tE of the electrolytic capacitor and displays the remaining operating time until maintenance on the display unit 208, so that the maintenance timing of the CBM parts of the gas compressor can be estimated and managed.

[0085] In the above first to third embodiments, the intercooler, the intake filter, and the electrolytic capacitor are used as examples of parts to be maintained, but the present invention is not limited to these and can be applied to other parts.

[0086] The present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

[0087] 100... oil-free screw compressor, 101... low-pressure stage compressor body, 102... high-pressure stage compressor body, 103... filter, 103A... suction port, 104... intercooler, 105... air piping, 106... air piping, 107... check valve, 108... aftercooler, 109... air piping, 110... low-pressure stage air release piping, 111... low-pressure stage air release piping, 112... low-pressure stage air release two-way valve, 113... low-pressure stage air release two-way valve, 114... high-pressure stage air release piping, 115... high-pressure stage air release piping, 116... high-pressure stage air release two-way valve, 117... high-pressure stage air release two-way valve, 118... pressure detection 119...control device, 120...discharge air piping, 121...pressure detector, 122...temperature detector, 123...display unit, 124...antenna, 125...network cloud, 126...suction throttle valve, 127...MSG, 200...oil-lubricated screw compressor, 201...compressor body, 202...suction filter, 203...suction throttle valve, 204...oil separation tank, 205...aftercooler, 206...pressure detector, 207...control device, 208...display unit, 209...antenna, 210...network cloud, 211, 212, 213...MSG

Claims

1. A gas compressor that compresses air, comprising: an acquisition unit that acquires the condition of components of the gas compressor; a processing unit that estimates the timing of maintenance for the components based on the condition; and a display unit, wherein the processing unit displays the estimated maintenance timing on the display unit.

2. A gas compressor according to claim 1, wherein the processing unit displays, on the display unit, a work instruction for the user to extend the maintenance interval for the part.

3. A gas compressor according to claim 2, wherein the processing unit estimates the maintenance timing based on a change in the condition of the part from a reference date to the present.

4. A gas compressor according to claim 2, wherein the processing unit estimates the maintenance timing based on the usage time of the part from a reference date to the present.

5. A parts maintenance management method for a gas compressor that compresses air, comprising: acquiring a condition of a part of the gas compressor; estimating a maintenance timing for the part based on the condition; and displaying the estimated maintenance timing on a display unit.

6. A parts maintenance management method according to claim 5, wherein a work instruction to a user for extending a maintenance interval for the part is displayed on the display unit.

7. A parts maintenance management method according to claim 6, further comprising the step of estimating the maintenance timing based on a change in the condition of the part from a reference date to the present.

8. A parts maintenance management method according to claim 6, wherein the maintenance timing is estimated based on the amount of time the part has been in use from a reference date to the present.

9. A parts maintenance management system comprising a gas compressor that compresses air and a server communicatively connected to the gas compressor, wherein the gas compressor comprises an acquisition unit that acquires the status of parts of the gas compressor, the server comprises a processing unit that estimates the maintenance timing of the parts based on the status, at least one of the gas compressor and the server comprises a display unit, and the processing unit displays the estimated maintenance timing on the display unit.

10. A parts maintenance management system according to claim 9, wherein the processing unit displays on the display unit a work instruction to a user for extending the maintenance interval of the part.

11. A parts maintenance management system according to claim 10, wherein the processing unit estimates the maintenance timing based on changes in the condition of the parts from a reference date to the present.

12. A parts maintenance management system according to claim 10, wherein the processing unit estimates the maintenance timing based on the amount of time the part has been in use from a reference date to the present.