Compressor and method for compressing a working medium

Abstract

The compressor (1) comprises a compressor piston (2) for compressing a working medium, a seal (4) for sealing the compressor piston (2), a magazine (7) for housing a plurality of replacement seals (8), and a replacement device (11) for replacing the seal (4) with one of the plurality of replacement seals (8) in the magazine (7). The central axes (10) of the replacement seals (8) are arranged substantially in line with the longitudinal axis (A2) of the magazine (7).

Description

Technical Field

[0001] The present invention relates to a compressor. The compressor includes a compressor piston that compresses a working medium, a seal that seals the compressor piston, a magazine that houses a plurality of replacement seals, and a replacement device that replaces the seal with one of the replacement seals in the magazine.

[0002] The present invention also relates to a method of compressing a working medium. The method includes moving a compressor piston that compresses the working medium, wherein the compressor piston is sealed with a seal, providing a magazine having a plurality of replacement seals, and replacing the seal with one of the replacement seals in the magazine.

Background Art

[0003] As described in EP3514380A1, replacing the seal in a conventional high-pressure compressor is very complicated and time-consuming. In contrast, EP3514380A1 proposes a compressor in which seal replacement is automated. When the high-pressure seal is worn or damaged so that the sealing performance of the high-pressure piston cannot be guaranteed, the replacement device is operated to replace the high-pressure seal with a replacement high-pressure seal. If all the high-pressure (replacement) seals are worn, the entire magazine can be replaced with the corresponding magazine. It is possible to use an unused replacement high-pressure seal or insert a new replacement high-pressure seal into the magazine. In this prior art, various designs of magazines that can keep individual replacement high-pressure seals in stock have already been disclosed. Depending on the design, the magazine can rotate or move.

[0004] This level of technology offers a significant improvement over conventional high-pressure compressors, for example, when used to provide high-pressure compressors. However, unfortunately, the number of replacement seals in the rotary magazine is limited due to space constraints. Positioning accuracy could also be improved. These drawbacks also exist in the sliding version of the magazine, where the replacement high-pressure seals are positioned in the same plane as the original high-pressure seals.

[0005] Furthermore, the general level of technology is shown in Japanese Patent Publication No. 8-177749, EP2721297Bl, and DE8224258Ul. [Overview of the Initiative]

[0006] Therefore, an object of the present invention is to mitigate or eliminate at least some of the drawbacks of the prior art. In particular, the present invention aims to further reduce the number of service operations required to replace seals.

[0007] In a compressor equipped with a replacement device for replacing seals according to the present invention, the central axes of the replacement seals are arranged substantially in a straight line along the longitudinal axis of the magazine.

[0008] For the purposes of this disclosure, positional and directional indications such as “Up,” “Down,” “Horizontal,” and “Vertical” indicate the intended operating state of the compressor.

[0009] Therefore, the replacement seals (with unused seal elements) are arranged in a single-row, aligned storage position along the longitudinal axis of the magazine, with an aligned central axis. This design allows for the storage of a significantly larger number of replacement seals in a single magazine ("new magazine"), thus extending the interval between service calls.

[0010] In a preferred embodiment, the seal comprises a particularly annular seal carrier to which at least one annular seal element is attached. During compressor operation, as the working medium is compressed, the annular seal element makes sealing contact with the jacket of the compressor piston. Furthermore, the seal may include an axial seal element for sealing in the longitudinal direction of the compressor piston. The replacement seal is preferably identical to the seal.

[0011] The compressor piston is preferably a plunger piston that can move back and forth along the cylinder. The compressor piston can be driven in various ways, for example, by a hydraulic pump. The compressor may have one or more compressor stages.

[0012] In a preferred embodiment, the magazine includes a longitudinal guide that guides a replacement seal in the direction of the magazine's substantial longitudinal axis. The longitudinal guide is preferably set up to hold the replacement seal essentially without play in any direction laterally, i.e., perpendicular to the magazine's longitudinal axis. Thus, in the stowed position, the replacement seal is positioned to move the magazine exclusively in the direction of the magazine's longitudinal axis. The longitudinal guide may, for example, include a guide rod extending in the direction of the magazine's longitudinal axis.

[0013] In a preferred embodiment, the replacement seals are stacked along the magazine in a substantially horizontal position relative to each other vertically (i.e., with the main plane of the replacement seals substantially horizontal). Thus, in this embodiment, the replacement seals are arranged as a substantially vertical stack along the magazine. In this embodiment, the longitudinal axis of the magazine extends essentially vertically. Advantageously, a large number of replacement seals can be stored in a space-saving manner. The top replacement seal can be moved upward from its storage position in the magazine to its replacement position to allow for replacement of the seal.

[0014] It is advantageous for the replacement device to include a feed drive for moving the replacement seals, preferably together, essentially in the longitudinal direction of the magazine, in order to replace a seal with a replacement seal. By operating the feed drive, the arrangement of the replacement seals can be moved along the magazine, and in particular, can be raised or lowered vertically depending on the design, so that one of the replacement seals, in particular the uppermost replacement seal, can be moved from the storage position to the replacement position. The feed drive may be, for example, an electric motor, a spindle drive, a hydraulic drive, or a pneumatic drive.

[0015] For raising and lowering replacement seals together, it is convenient if the replacement device has a platform for the (upper) placement of the replacement seals, and the feed drive is configured to move the platform together with the replacement seals. By activating the feed drive, the stack of replacement seals on the platform can be lifted to place the top replacement seal in the replacement position.

[0016] Furthermore, the replacement device is preferably set up to guide the seal away from the compressor piston, or to guide the replacement seal toward the compressor piston. For this purpose, the replacement device preferably comprises a slider. On the one hand, the slider can be designed to move the seal from an operating position aligned with the compressor piston, particularly perpendicular to the longitudinal direction of the compressor piston, to a replacement position aligned with the replacement seal. Furthermore, the slider can be designed to move one of the replacement seals from a replacement position aligned with the other replacement seal, particularly perpendicular to the longitudinal axis of the magazine, to an operating position aligned with the compressor piston. Preferably, the slider is connected to an actuator, such as another electric motor, another spindle drive, a hydraulic drive, or a pneumatic drive.

[0017] For reliable movement of the seal between the operating position and the replacement position, or reliable movement of the replacement seal between the replacement position and the operating position, it is advantageous if the slider is equipped with a mounting ring for holding the seal and / or replacement seal. Preferably, the (replacement) seal is positioned such that there is essentially no play in the mounting ring.

[0018] Disposing of the seals after replacement is suitable if you have an extra magazine ("old magazine") available to hold the replaced seals.

[0019] If the longitudinal axis of the additional magazine is essentially aligned with the longitudinal axis of the magazine, the seal used can be placed on the additional magazine particularly easily.

[0020] In a preferred embodiment, the feed drive for moving the replacement seal is also configured to move the seal, which is positioned in the replacement position, to an additional magazine. Thus, a single actuation of the feed drive can move the replacement seal from the storage position to the replacement position, and the seal from the replacement position to the pickup position of the additional magazine. In embodiments with a slider, the feed drive can be used to move the seal from the slider's change position to the pickup position of the additional magazine, and the replacement seal from the magazine's storage position to the slider's replacement position.

[0021] In a preferred embodiment, a cover plate is positioned between each pair of replacement seals. Preferably, the cover plate is not connected to the replacement seals. That is, the replacement seals can be transported from the replacement position to the operating position without being taken along with the adjacent cover plate. Thus, this cover plate can be used to close the magazine opening during the switching operation. Furthermore, the cover plate can be taken up by an additional magazine along the magazine opening as the next replacement seal moves to the replacement position. This also allows another opening of an additional magazine to be closed during the replacement operation. It is also preferable that the cover plate protects the individual (replacement) seals of the (additional) magazine.

[0022] In this embodiment, it is undesirable if the magazine has a first position claw for holding the cover plate in place, and / or if an additional magazine has a second position claw for holding the cover plate in place. The first or second positioning claw may comprise an elastically flexible retaining element for engaging with the cover plate.

[0023] To release the seal from the circumference of the compressor piston, it is advantageous to be able to move the compressor piston to a retracted position beyond the operating dead center relative to one of the magazine's replacement seals. During operation, the compressor piston moves between two operating dead centers. To replace the seal, the compressor piston is moved to a retracted position beyond one of the dead centers, thereby pulling the compressor piston away from the seal. The seal can then be moved from the operating position to the replacement position, preferably via a slider.

[0024] In a preferred embodiment of the compressor, the compressor piston is connected to an additional compressor piston via a transfer chamber. The additional compressor piston is preferably positioned essentially parallel to the compressor piston.

[0025] In a preferred embodiment, the lower part of the compressor piston is particularly arranged in the receiving cylinder, whereby an annular gap is formed at the first end of the compressor between the compressor piston and the wall of the receiving cylinder. Accordingly, the additional part of the compressor piston, particularly the lower part, can be arranged in an additional receiving cylinder, whereby an additional annular gap can be formed between the additional compressor piston and the wall of the additional receiving cylinder.

[0026] The annular gap is preferably connected via a chamber to an engine, such as a high-pressure pump, and the additional annular gap is preferably connected via an additional chamber to an engine, such as a high-pressure pump. In the first position, the chamber is connected to the pressure side of the engine via a valve, particularly a slide valve, and the additional chamber is connected to the suction side of the engine via a further valve, particularly a slide valve. The transfer chamber is preferably filled with a working fluid in order to redirect the movement of the compressor piston, particularly 180°, towards the additional compressor piston, whereby the additional compressor piston is moved in a direction opposite to the direction of the compressor piston. In the second position, the additional chamber is connected to the pressure side and the chamber is connected to the suction side of the engine. Thereby, the direction of movement of the additional compressor piston is reversed, and thereby the movement is transmitted to the compressor piston via the working fluid in the transfer chamber.

[0027] The compressor piston and the additional compressor piston can be driven via an engine, particularly hydraulically or pneumatically. A pressure converter can be provided for the compressor piston, along with which the annular gap is closed off from the transfer chamber. Accordingly, an additional pressure converter can be provided for the additional compressor piston with which the additional annular gap is closed off from the transfer chamber. The (pneumatic or hydraulic) drive pressure is transmitted via the pressure converter or the additional pressure converter to the hydraulic fluid in the transfer chamber.

[0028] The method according to the invention for compressing a working medium comprises at least A compressor piston for compressing a working medium, the compressor piston sealing a first space with respect to a second space provided with a seal, providing a magazine provided with a plurality of replacement seals, replacing the seal with one of the replacement seals of the magazine, and the central axis of the replacement seal being substantially aligned along the longitudinal axis of the magazine.

[0029] Replacement with one of the replacement seals of the magazine involves Moving the compressor piston beyond the operating dead center to a retracted position, and / or moving the seal from an operating position, particularly arranged in alignment with the longitudinal direction of the compressor piston, to a replacement position arranged in alignment with the replacement seal, and / or moving the seal, particularly arranged in the longitudinal direction of the magazine, to a storage position of an additional magazine, and / or moving one of the replacement seals to a replacement position corresponding to the replacement position in the longitudinal direction of the magazine, moving the replacement seal arranged in the replacement position, particularly the replacement seal arranged perpendicular to the longitudinal direction of the magazine, to an operating position arranged in alignment with the compressor piston, and / or pushing the compressor piston into the replacement seal arranged in the operating position, and / or moving one of the replacement seals to the replacement seal arranged in the operating position, preferably including one or more, particularly all of these.

[0030] A preferred working medium is a gaseous working medium, particularly molecular hydrogen, natural gas, nitrogen, argon, helium, or a mixture of several of the aforementioned working media.

[0031] The present invention will be further described below with reference to preferred embodiments and in accordance with the drawings.

Brief Description of the Drawings

[0032] [Figure 1] FIG. 1 shows a replacement seal when a replacement device for replacing a used seal in a compressor of the present invention is provided. [Figure 2]Figure 2 shows an embodiment of a compressor according to the present invention, in which one compressor piston is connected to an additional compressor piston via a transfer chamber. [Modes for carrying out the invention]

[0033] Figure 1 shows a compressor 1, which may include one compressor stage (illustrated) or several compressor stages (not shown). The compressor 1 comprises at least one high-pressure compressor piston 2 having a longitudinal axis or longitudinal direction A1. The compressor piston 2 moves back and forth in a cylinder 3 between first and second operating dead centers. The compressor piston 2 seals the first space 3A of the cylinder 3 from the second space 3B by a (high-pressure) seal device, hereinafter referred to as seal 4. Seal 4 comprises an annular seal element 5 with a central axis 6 (i.e., an axis passing through the center of the annular seal element 5) and a seal carrier 4A provided with an axial seal 4B. In the operating position, the central axis 6 of seal 4 is aligned with the longitudinal direction A1 of the compressor piston 2. When the working medium is compressed, the annular seal element 5 makes close contact with the jacket of the compressor piston 2.

[0034] As can be seen from Figure 1, the magazine 7 is provided with several, in particular, at least five, preferably ten or more (high-pressure) replacement seals 8, which are designed identically to the seal 4. Thus, each replacement seal 8 comprises a replacement seal carrier 9A, an annular circumferential replacement seal element 9B having a central axis 10 (i.e., an axis passing through the center of the annular replacement seal element 9B in the axial direction), and an axial replacement seal 9C. With the help of the replacement device 11, the seal 4 can be replaced with one of the replacement seals 8 in the magazine 7.

[0035] As can be seen from Figure 1, in the illustrated storage position, the central axes 10 of the replacement seals 8 are aligned with each other, i.e., in a straight line, along the longitudinal axis A2 of the center of the magazine 7. If the longitudinal axis A2 of the magazine 7 extends vertically, as in the illustrated example, the replacement seals 8 are stacked in an essentially horizontal position, i.e., with their central axes 10 vertically aligned, one above the other, along the longitudinal axis A2 of the magazine 7. In this case, the magazine 7 is equipped with a longitudinal guide 12 with individual guide rods, which hold the replacement seals 8 in a lateral position, i.e., any direction perpendicular to the longitudinal axis A2.

[0036] As can be seen in Figure 1, the replacement device 11 includes a feed drive 13 for moving the replacement seal 8 in the direction of the longitudinal axis A2 of the magazine 7. Furthermore, the replacement device 11 includes a platform 14, which is connected, for example, via a driver rod or directly to the feed drive 13. The replacement seal 8 is placed on the platform 14. By operating the feed drive 13, the platform 14 can be moved upward or downward as needed along with the replacement seal 8.

[0037] As can be seen from Figure 1, the replacement device 11 is equipped with a slider 15. The slider 15 can be used to move the seal 4 from the operating position shown in Figure 1 to the adjacent replacement position in the magazine 7, in a direction perpendicular to the longitudinal direction A1 of the compressor piston 2. In the operating position, the central axis 6 of the seal 4 is aligned with the longitudinal axis A1 of the compressor piston 2. In the replacement position, the central axis 6 of the seal 4 is aligned with the longitudinal axis A2 of the magazine 7. Furthermore, the slider 15 can be used to move one of the replacement seals 8 from a replacement position, which is arranged concentrically with respect to the magazine, to the operating position, in a direction perpendicular to the longitudinal axis A2 of the magazine 7 (and therefore parallel to the longitudinal direction A1 of the compressor piston 2 in the illustrated embodiment). In the replacement position, the central axis 10 of the replacement seal 8 is aligned with the longitudinal axis A2 of the magazine 7. In the operating position, the central axis 10 of the replacement seal 8 is aligned in a straight line with the longitudinal axis A1 of the compressor piston 2.

[0038] As can be seen in Figure 1, the slider 15 in the illustrated embodiment includes a mounting ring 16, which (depending on the process step) receives a seal 4 or a replacement seal 8 inside. The slider 15 is slidably mounted on the base 15A of the compressor. To move the slider 15, the slider 15 is connected to an actuator 15B, for example, a hydraulic cylinder-piston drive. The sliding ring 15C acts as an upper limit for the slider 15.

[0039] As can be seen in Figure 1, the compressor 1 is further equipped with an additional magazine 17 that can store the replaced seals 4 and the used replacement seals 8. For illustrative purposes, a used seal 23 is placed in the additional magazine 17 in Figure 1. The longitudinal axis of the additional magazine 17 is aligned with the longitudinal axis A2 of the magazine 7. In the illustrated embodiment, the additional magazine 17 is positioned adjacent to the magazine 7, in this case above the magazine 7. Corresponding to the magazine 7, the additional magazine 17 is designed to hold the seals 4 and the replacement seals 8, aligning their central axes with each other. The feed drive 13 described above is designed to move the seal 4, which has been moved to the change position, from the slider 15 to the storage position in the additional magazine 17, and to move the foremost, in this case the uppermost, replacement seal 8 from the storage position in the magazine 7 to the change position on the slider 15.

[0040] As can be seen in Figure 1, the cover plate 18 is positioned between each of the two replacement seals 8. Magazine 7 is equipped with a first (lower) positioning claw 19 that holds one of the cover plates 18. Additional magazine 17 is equipped with a second (upper) positioning claw 20 that holds one of the cover plates 18. The first positioning claw 19 and the second positioning claw 20 each have a retaining element that is elastically flexible.

[0041] As can be seen in Figure 1, the compressor piston 2 can be moved to a retracted position beyond the first dead center of operation shown in Figure 1 in preparation for a seal change, so that the annular sealing element 5 of the seal 4 is axially released from the jacket of the cylinder piston 2.

[0042] As can be seen from Figure 1, a pretensioning device 21 is provided, which is operated either hydraulically or by gas. The pretensioning device 21 presses the seal 4 against one end face of the cylinder barrel 3. The axial seal 4B seals the cylinder barrel 3 against the seal carrier 4A.

[0043] The procedure for replacing seal 4 with replacement seal 8 is as follows:

[0044] Any leakage of the working fluid from the first space 3A formed in the sealing member 4 is transferred to the second space 3B. The second space 3B is fluidically connected to a leak detection device. Since this device is known in the prior art, it is not necessary to discuss the device in more detail here. When a leak in the seal 4 exceeding an acceptable level is detected (by the device known in the prior art), automatic seal replacement is initiated at the next possible time.

[0045] In the first stage of seal replacement, for example, the first space 3A of the high-pressure cylinder 3 is released and discharged into the cylindrical tube. The compressor piston 2 descends along the first longitudinal axis A1 until it exceeds the first dead center during operation, in this case the lower dead center, for example 260 mm. In preparation for seal replacement, the stroke of the compressor piston 2 can reach, for example, 300 mm.

[0046] In the next step, the pretensioning device 21 is moved to a relaxed state, which releases the seal 4.

[0047] In the next step, the actuator 15B for the slider 15 is activated. This moves the slider 15, with the seal 4 attached, from the operating position to the change position. The seal 4 is located on the cover or separation plate 18 that closes the opening of the magazine 7.

[0048] Next, the feed drive 13 is activated, which moves the platform 14 forward along with the replacement seal 8. The stack of replacement seals 8 is lifted up together with the replacement seal 8 on top of it until another cover plate 18 engages with the first positioning claw 19. With the magazine 7 closed, the cover plate 18 engaged with the first positioning claw 19 is lifted up together with the worn seal 4 until this cover plate 18 engages with the second positioning claw 20. In this way, the seal 4 is stored in the additional magazine 17 (i.e., the old magazine).

[0049] Next, the platform 14 can be lowered again by the feed drive device 13. The replacement seal 8 located on the slider 15 is moved to the operating position by the actuator 15B.

[0050] Finally, the compressor piston 2 is moved to the operating stroke position. To do this, the compressor piston 2 is pushed along the first longitudinal axis A1 into the replacement seal 8 which is positioned in the operating position. Next, the pretensioning device 21 is activated to press the replacement seal 8 against the cylinder barrel 3. In this way, the first space 3A is sealed from the surroundings and the second space 3B by the axial sealing element and the annular sealing element of the replacement seal 8.

[0051] In one embodiment, a compressor 1 is used to supply hydrogen at a maximum outlet pressure of 1050 bar. The compressor piston 2 can be driven, for example, by a hydraulic fluid.

[0052] Figure 2 shows a preferred embodiment of the compressor 1, in which the compressor piston 2 is connected to an additional compressor piston 25 via a transfer chamber 24. The additional compressor piston 25 is positioned essentially parallel to the compressor piston 2. A portion of the compressor piston 2 is positioned in a receiving cylinder 26 at the first end of the compressor 1 (shown in Figure 2), where an annular gap 27 is formed between the compressor piston 2 and the wall of the receiving cylinder 26. Thus, a portion of the additional compressor piston 25 is positioned in an additional receiving cylinder 28, and an additional annular gap 33 is formed between the additional compressor piston 25 and the wall of the additional receiving cylinder 28. The annular gap 27 is connected to an engine, such as a high-pressure pump, via a chamber 29, and the additional annular gap 33 is connected to an engine, such as a high-pressure pump, via an additional chamber 30. In the illustrated position, the chamber 29 is connected to the pressure side of the engine via a valve, in particular a slide valve, and the additional chamber 30 is connected to the intake side of the engine via an additional valve, in particular a slide valve. In the illustrated design, the transfer chamber 24 is filled with hydraulic fluid to redirect the movement of the compressor piston 2 by 180° to an additional compressor piston 25, thereby moving the additional compressor piston 25 in the opposite direction to the compressor piston 2. Upon reaching the end position, a valve switches, connecting the additional chamber 30 to the pressure side and the chamber 29 to the engine intake side. This reverses the direction of movement of the additional compressor piston 25, thereby transmitting its movement to the compressor piston 2 via the hydraulic fluid in the transfer chamber 24.

[0053] The compressor piston 2 and the additional compressor piston 25 can be driven hydraulically or pneumatically via the engine. The compressor piston 2 is equipped with a pressure transducer 31, which closes the annular gap 27 from the transfer chamber 24. Correspondingly, the additional pressure transducer 32 is provided on the additional compressor piston 25, which together closes the additional annular gap 33 from the transfer chamber 24. The (pneumatic or hydraulic) driving pressure is transmitted to the hydraulic fluid in the transfer chamber 24 via the pressure transducer 31 or the additional pressure transducer 32. [Explanation of symbols]

[0054] (Reference number list) 1 Compressor 2 Compressor Pistons 3 Cylinder Barrel 3A First Space 3B The second space 4 stickers 4A Seal Carrier 4B Axial seal 5 Seal elements 6. Central axis of the seal 7 Magazines 8 Replacement seals 9A Replacement Seal Carrier 9B Annular circumferential replacement seal element 9C Axial Replacement Seal 10. Center axis of the replacement seal 11 Exchange device 12 Guides 13 Feed drive unit 14 Platforms 15 Sliders 15A Base Actuator for 15B Slider 16 Mounting rings 17 Additional Magazines 18 Cover Plate 19 Lower positioning claw 20 Upper positioning claw 21 Pretensioning device 22 Leak detection device 23 Used stickers from old magazines 24 Transfer Chamber 25 Additional compressor pistons 26 Receiving Cylinder 27 Annular gap 28 Additional receiving cylinders 29 Chambers 30 Additional Chambers 31 Pressure transducer 32 Additional pressure transducers

Claims

1. A compressor (1), A compressor piston (2) that compresses the working medium, A seal (4) that seals the compressor piston (2), A magazine (7) that houses multiple replacement seals (8), The system includes a replacement device (11) for replacing the seal (4) with one of the plurality of replacement seals (8) of the magazine (7), The compressor (1) is characterized in that the central axis (10) of the replacement seal (8) is arranged in a straight line along the longitudinal axis (A2) of the magazine (7).

2. The compressor (1) according to claim 1, characterized in that the replacement seals (8) are stacked one by one horizontally on top of each other along the magazine (7).

3. The compressor (1) according to claim 1 or 2, characterized in that the replacement device (11) includes a feed drive device (13) for moving the replacement seal (8) in the direction of the longitudinal axis (A2) of the magazine (7).

4. The compressor (1) according to claim 3, characterized in that the replacement device (11) includes a platform (14) for arranging the replacement seal (8), and the feed drive device (13) is arranged to move the platform (14) together with the replacement seal (8).

5. The compressor (1) according to claim 1 or 2, characterized in that the replacement device (11) includes a slider (15) that moves the seal (4) from an operating position aligned with the compressor piston (2) to a change position aligned with the replacement seal (8), and moves one of the replacement seals (8) from a change position aligned with the other replacement seal (8) to an operating position aligned with the compressor piston (2).

6. The compressor (1) according to claim 5, characterized in that the slider (15) includes a mounting ring (16) for receiving the seal (4) and / or the replacement seal (8).

7. The compressor (1) according to claim 1 or 2, characterized by an additional magazine (17) for receiving used seals (23).

8. The compressor (1) according to claim 7, characterized in that the longitudinal axis of the additional magazine (17) is arranged in a straight line with the longitudinal axis (A2) of the magazine (7).

9. The compressor (1) according to claim 7, characterized in that the feed drive device (13) is arranged to move the seal (4) positioned in the change position to the additional magazine (17).

10. The compressor (1) according to claim 1 or 2, characterized in that a cover plate (18) is positioned between two replacement seals.

11. The compressor (1) according to 10, characterized in that the magazine (7) is provided with a first positioning claw (19) for holding the cover plate (18), and the additional magazine (17) is provided with a second positioning claw (20) for holding the additional cover plate (18).

12. The compressor (1) according to claim 1 or 2, characterized in that the compressor piston (2) is movable beyond the operating dead center to a retracted position in order to replace the seal (4) with one of the replacement seals (8) of the magazine (7).

13. A method for compressing a working medium, The seal (4) is sealed and moves the compressor piston (2) that compresses the working medium, A magazine (7) is provided with multiple replacement seals (8), This includes replacing the seal (4) with one of the multiple replacement seals (8) of the magazine (7), A method characterized in that the central axis (10) of the replacement seal (8) is arranged in a straight line along the longitudinal axis (A2) of the magazine (7).

14. Replacing the seal (4) with one of the multiple replacement seals (8) of the magazine (7) is: Moving the compressor piston (2) beyond the operating dead center to a retracted position, The seal (4) is moved from an operating position aligned with the compressor piston (2) to a change position aligned with the replacement seal (8), The seal (4), which is positioned in the modified location, is moved to the storage location of the additional magazine (17), Moving one of the replacement seals (8) to the replacement position corresponding to the change position of the seal (4), The replacement seal (8), positioned at the replacement position, is moved to an operating position aligned with the compressor piston (2). The compressor piston (2) is pushed into the replacement seal (8) positioned in the operating position, The method according to 13, characterized by including

Images