Oil tank structure and centrifugal compressor unit

Abstract

The utility model provides an oil tank structure and a centrifugal compressor unit, and relates to the field of industrial compression. The oil tank structure comprises an oil tank shell, a first mounting bracket and a second mounting bracket, the first mounting support is used for being connected with a main motor, a first connecting piece is arranged on the first mounting support, a first adjusting groove is formed in the first connecting piece, a first fastening piece is arranged in the first adjusting groove in a penetrating mode, and the first connecting piece is detachably connected with an oil tank shell through the first fastening piece; the second installation support is used for being connected with the public base, a second connecting piece is arranged on the second installation support, a second adjusting groove is formed in the second connecting piece, a second fastening piece is arranged in the second adjusting groove in a penetrating mode, and the second connecting piece is detachably connected with the oil tank shell through the second fastening piece. Compared with an existing integral welding mode, the oil tank structure is of a split type assembly structure, has better adjustability and universality, and can be suitable for installation of various main motors and common bases.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial compression field especially, and relates to an oil tank structure and centrifugal compressor unit. BACKGROUND

[0002] With the rapid development of compressor technology, and the centrifugal compressor is more and more widely used in petroleum chemical industry and other industrial fields, the overall structure design of centrifugal compressor unit also tends to be mature. How to further optimize the unit structure design, improve the adjustability and versatility of each part of the unit, gradually becomes one of the most important issues in the field of industrial compression.

[0003] The oil tank of centrifugal compressor unit is generally installed on the common base of the unit, and the main motor of the unit is generally placed above the oil tank. The installation and connection mode of the oil tank, the common base and the main motor has a direct impact on the installation, debugging and subsequent maintenance of the unit.

[0004] For the oil tank structure of the existing centrifugal compressor unit, the oil tank top mounting bracket for mounting the motor and the oil tank bottom mounting bracket for mounting the oil tank to the common base are connected to the upper surface of the oil tank shell by welding. After the oil tank is produced and made, the above three are an integral whole that cannot be disassembled. The adjustability and versatility of the oil tank structure composed in this way are poor, which leads to the positions of the oil tank mounted on the common base and the main motor mounted on the oil tank being basically fixed. When the unit installation and debugging interfere or other abnormalities occur, the installation position cannot be adjusted conveniently. At the same time, when the main motor or the common base needs to be replaced, it is difficult to match the replaced main motor or common base due to the positions of the oil tank top mounting bracket and the oil tank bottom mounting bracket being basically fixed, and the versatility is poor. SUMMARY

[0005] In order to solve the problems in the prior art, one of the purposes of the utility model is to provide an oil tank structure.

[0006] The utility model provides the following technical scheme:

[0007] An oil tank structure comprises:

[0008] An oil tank shell;

[0009] A first mounting bracket, the first mounting bracket is used for being connected with a main motor, a first connecting piece is arranged on the first mounting bracket, a first adjusting groove is arranged on the first connecting piece, a first fastener is arranged in the first adjusting groove, and the first connecting piece is detachably connected with the oil tank shell through the first fastener; and

[0010] A second mounting bracket is used to connect with the public base, a second connecting piece is arranged on the second mounting bracket, a second adjusting slot is arranged on the second connecting piece, a second fastener is arranged in the second adjusting slot, and the second connecting piece is detachably connected with the oil tank shell through the second fastener.

[0011] As a further optional scheme of the oil tank structure, a first mounting piece is arranged on the oil tank shell, a third adjusting slot is arranged on the first mounting piece, and the extending direction of the third adjusting slot intersects with the extending direction of the first adjusting slot.

[0012] The first fastener is arranged in the third adjusting slot, and the first connecting piece is detachably connected with the first mounting piece through the first fastener.

[0013] As a further optional scheme of the oil tank structure, the first fastener comprises a first fastening bolt and a first fastening nut, the first fastening bolt is arranged in the first adjusting slot and the third adjusting slot, and the first fastening nut is sleeved on the first fastening bolt.

[0014] As a further optional scheme of the oil tank structure, the first mounting bracket is provided with at least two, two first connecting pieces are arranged on each first mounting bracket, and the two first connecting pieces are detachably connected to the edge region of the surface of the oil tank shell facing the first mounting bracket, each first mounting bracket further comprises a first cross beam, and the first cross beam is connected with the two first connecting pieces.

[0015] As a further optional scheme of the oil tank structure, a second mounting piece is arranged on the oil tank shell, a fourth adjusting slot is arranged on the second mounting piece, and the extending direction of the fourth adjusting slot intersects with the extending direction of the second adjusting slot.

[0016] The second fastener is arranged in the fourth adjusting slot, and the second connecting piece is detachably connected with the second mounting piece through the second fastener.

[0017] As a further optional scheme of the oil tank structure, the second fastener comprises a second fastening bolt and a second fastening nut, the second fastening bolt is arranged in the second adjusting slot and the fourth adjusting slot, and the second fastening nut is sleeved on the second fastening bolt.

[0018] As a further optional scheme of the oil tank structure, the second mounting support is provided with at least two, each of the second mounting supports is provided with two second connecting pieces, and the two second connecting pieces are respectively detachably connected to the edge area of the surface of the second mounting support towards the oil tank shell.

[0019] As a further optional scheme of the oil tank structure, the first mounting support is provided with a third connecting piece, the third connecting piece is connected with the first connecting piece, and the third connecting piece is used for being connected with the main motor.

[0020] The second mounting support is provided with a fourth connecting piece, the fourth connecting piece is connected with the second connecting piece, and the fourth connecting piece is used for being connected with the common base.

[0021] As a further optional scheme of the oil tank structure, the first connecting piece is detachably connected with the top surface of the oil tank shell, and the second connecting piece is detachably connected with the bottom surface of the oil tank shell.

[0022] The side surface of the oil tank shell is provided with a manhole and a cover plate covering the manhole.

[0023] Another object of the utility model is to provide a centrifugal compressor unit.

[0024] The utility model provides the following technical scheme:

[0025] A centrifugal compressor unit, comprising a main motor, a common base and the oil tank structure, the main motor is connected with the first mounting support, and the common base is connected with the second mounting support.

[0026] The embodiment of the utility model has the following beneficial effects:

[0027] In the aforementioned oil tank structure, the first mounting bracket is used to connect to the main motor and is provided with a first connecting piece for detachable connection to the oil tank housing. The second mounting bracket is used to connect to the common base and is provided with a second connecting piece for detachable connection to the oil tank housing, thereby sequentially connecting the main motor, oil tank housing, and common base into a single unit. When interference or other abnormalities occur during the installation and commissioning of the centrifugal compressor unit, or when it is necessary to replace the main motor or common base, the installer can appropriately adjust the relative position of the first mounting bracket and the oil tank housing along the extension direction of the first adjustment groove, thereby adjusting the installation position of the main motor on the oil tank housing to eliminate possible interference or other abnormalities, or to better match the replaced main motor. Similarly, the installer can also appropriately adjust the relative position of the second mounting bracket and the oil tank housing along the extension direction of the second adjustment groove, thereby adjusting the installation position of the oil tank housing on the common base to eliminate possible interference or other abnormalities, or to better match the replaced common base. After adjustment, the first connecting piece can still be detachably connected to the fuel tank housing via the first fastener passing through the first adjustment slot, and the second connecting piece can still be detachably connected to the fuel tank housing via the second fastener passing through the second adjustment slot. Compared with the existing integral welding method, the above-mentioned fuel tank structure adopts a split assembly structure, which has better adjustability and versatility, and can be used for the installation of various main motors and common bases.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A front view of a fuel tank structure provided in an embodiment of the present invention is shown;

[0031] Figure 2 An exploded view of a fuel tank structure provided in an embodiment of this utility model is shown;

[0032] Figure 3 This diagram illustrates the connection relationship between the first connecting member and the first mounting member in a fuel tank structure according to an embodiment of the present invention.

[0033] Figure 4This diagram illustrates the connection relationship between the second connector and the second mounting component in a fuel tank structure provided by an embodiment of the present invention.

[0034] Explanation of key component symbols:

[0035] 100 - Fuel tank housing; 110 - First mounting component; 111 - Third adjusting groove; 120 - Second mounting component; 121 - Fourth adjusting groove; 130 - First mounting surface; 140 - Second mounting surface; 150 - Manhole; 160 - Cover plate; 200 - First mounting bracket; 210 - First connector; 211 - First adjusting groove; 220 - First fastener; 221 - First fastening bolt; 222 - First fastening nut; 230 - First crossbeam; 240 - Third connector; 300 - Second mounting bracket; 310 - Second connector; 311 - Second adjusting groove; 320 - Second fastener; 321 - Second fastening bolt; 322 - Second fastening nut; 330 - Second crossbeam; 340 - Fourth connector. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] Example

[0042] Please refer to the following: Figures 1 to 4 This embodiment provides a fuel tank structure, specifically a more flexible and versatile fuel tank structure. The fuel tank structure includes a fuel tank housing 100, a first mounting bracket 200, and a second mounting bracket 300.

[0043] The first mounting bracket 200 is used to connect to the main motor, and a first connector 210 is provided on the first mounting bracket 200. A first adjustment groove 211 is provided on the first connector 210, and a first fastener 220 is inserted into the first adjustment groove 211. The first connector 210 is detachably connected to the oil tank housing 100 through the first fastener 220.

[0044] In addition, the second mounting bracket 300 is used to connect with the common base, and a second connector 310 is provided on the second mounting bracket 300. The second connector 310 is provided with a second adjustment groove 311, and a second fastener 320 is inserted into the second adjustment groove 311. The second connector 310 is detachably connected to the fuel tank housing 100 through the second fastener 320.

[0045] In the above-mentioned fuel tank structure, the first mounting bracket 200 is used to connect with the main motor and is provided with a first connecting piece 210 for detachable connection with the fuel tank housing 100. The second mounting bracket 300 is used to connect with the common base and is provided with a second connecting piece 310 for detachable connection with the fuel tank housing 100, thereby connecting the main motor, the fuel tank housing 100 and the common base in sequence into a whole.

[0046] When interference or other abnormalities occur during the installation and commissioning of the centrifugal compressor unit, or when the main motor or common base needs to be replaced, the installer can adjust the relative position of the first mounting bracket 200 and the oil tank housing 100 appropriately along the extension direction of the first adjustment groove 211, thereby adjusting the installation position of the main motor on the oil tank housing 100 to eliminate possible interference or other abnormalities, or to better match the replaced main motor.

[0047] Similarly, installers can also adjust the relative position of the second mounting bracket 300 and the fuel tank housing 100 along the extension direction of the second adjustment groove 311, thereby adjusting the installation position of the fuel tank housing 100 on the common base to eliminate possible interference or other abnormalities, or to better match the replaced common base. After adjustment, the first connector 210 can still be detachably connected to the fuel tank housing 100 via the first fastener 220 passing through the first adjustment groove 211, and the second connector 310 can still be detachably connected to the fuel tank housing 100 via the second fastener 320 passing through the second adjustment groove 311.

[0048] Compared with the existing integral welding method, the above-mentioned oil tank structure adopts a split assembly structure, which has better adjustability and versatility, and can be used for the installation of various main motors and common bases.

[0049] Please see Figure 3 In some embodiments, a first mounting member 110 is provided on the fuel tank housing 100. A third adjusting groove 111 is provided on the first mounting member 110, and the extending direction of the third adjusting groove 111 intersects the extending direction of the first adjusting groove 211.

[0050] Correspondingly, the first fastener 220 passes through the third adjustment groove 111, and the first connector 210 is detachably connected to the first mounting member 110 through the first fastener 220.

[0051] When interference or other abnormalities occur during the installation and commissioning of the centrifugal compressor unit, or when the main motor needs to be replaced, the installer can adjust the relative position of the first mounting bracket 200 and the oil tank housing 100 either along the extension direction of the first adjustment groove 211 or along the extension direction of the third adjustment groove 111. In this case, the adjustment range of the main motor's mounting position on the oil tank housing 100 is greater, and the entire oil tank structure becomes more flexible in terms of the installation position and method of the main motor, resulting in better adaptability and versatility.

[0052] Please refer to the following: Figure 1 and Figure 2Specifically, the surface of the fuel tank housing 100 facing the first mounting bracket 200 is the first mounting surface 130, and the first mounting member 110 is disposed on the first mounting surface 130. In addition, the extension direction of the first adjustment groove 211 and the extension direction of the third adjustment groove 111 are both perpendicular to the normal direction of the first mounting surface 130.

[0053] Optionally, the extension direction of the first adjustment groove 211 is perpendicular to the extension direction of the third adjustment groove 111.

[0054] Furthermore, the first fastener 220 includes a first fastening bolt 221 and a first fastening nut 222. The first fastening bolt 221 passes through the first adjusting groove 211 and the third adjusting groove 111, and the first fastening nut 222 is sleeved on the first fastening bolt 221.

[0055] In use, tightening the first fastening bolt 221 causes its head to engage with the first fastening nut 222, clamping the first connecting member 210 and the first mounting member 110 together. This utilizes friction to fix the first connecting member 210 and the first mounting member 110 together. Conversely, loosening the first fastening bolt 221 removes the first connecting member 210 from the first mounting member 110, allowing it to move relative to the first mounting member 110 along the extension direction of the first adjusting groove 211 and / or the third adjusting groove 111. Thus, the first connecting member 210 is detachably connected to the first mounting member 110 via the first fastener 220.

[0056] For example, the first connector 210 is a connecting plate, and the first mounting member 110 is a mounting plate. Both the connecting plate and the mounting plate are parallel to the first mounting surface 130. The first fastening bolt 221 passes through the first adjusting groove 211 and the third adjusting groove 111 in sequence along the normal direction of the first mounting surface 130. When the first fastening bolt 221 is tightened, the head of the first fastening bolt 221 abuts against the side of the connecting plate away from the mounting plate, and the first fastening nut 222 abuts against the side of the mounting plate away from the connecting plate.

[0057] Furthermore, at least two first mounting brackets 200 are provided, and each first mounting bracket 200 is provided with two first connectors 210. The two first connectors 210 are detachably connected to the edge area of ​​the surface of the fuel tank housing 100 facing the first mounting bracket 200. Each first mounting bracket 200 also includes a first crossbeam 230, which is connected to both first connectors 210.

[0058] Specifically, the first mounting members 110 are arranged in pairs on the edge region of the surface of the fuel tank housing 100 facing the first mounting bracket 200, that is, in pairs on the edge region of the first surface. The two first connecting members 210 in each first mounting bracket 200 are detachably connected to their respective first mounting members 110, and are simultaneously connected as a whole by the first crossbeam 230. At this point, the first connecting members 210 and the first mounting members 110 are small in size and light in weight, and can evenly bear force, thus securely mounting the main motor onto the fuel tank housing 100.

[0059] For example, there are two first mounting brackets 200, which are located at opposite ends of the first surface.

[0060] Furthermore, a third connector 240 is provided on the first mounting bracket 200. The third connector 240 is connected to the first connector 210 and is used to connect to the main motor.

[0061] Specifically, the third connector 240 is directly connected to the first crossbeam 230, and then indirectly connected to the first connector 210 through the first crossbeam 230. The third connector 240 is provided with mounting holes, and the main motor is installed into the mounting holes of the third connector 240 by screws.

[0062] Please see Figure 4 In some embodiments, a second mounting member 120 is provided on the fuel tank housing 100. The second mounting member 120 is provided with a fourth adjustment groove 121, the extension direction of the fourth adjustment groove 121 intersecting the extension direction of the second adjustment groove 311.

[0063] Correspondingly, the second fastener 320 passes through the fourth adjustment groove 121, and the second connector 310 is detachably connected to the second mounting member 120 through the second fastener 320.

[0064] When interference or other abnormalities occur during the installation and commissioning of the centrifugal compressor unit, or when the common base needs to be replaced, the installer can adjust the relative position of the second mounting bracket 300 and the oil tank housing 100 either along the extension direction of the second adjustment groove 311 or along the extension direction of the fourth adjustment groove 121. In this case, the adjustment range of the oil tank housing 100's mounting position on the common base is greater, and the entire oil tank structure becomes more flexible in its mounting position and method relative to the common base, resulting in better adaptability and versatility.

[0065] Please refer to the following: Figure 1 and Figure 2Specifically, the surface of the fuel tank housing 100 facing the second mounting bracket 300 is the second mounting surface 140, and the second mounting member 120 is disposed on the second mounting surface 140. In addition, the extending directions of the second adjusting groove 311 and the fourth adjusting groove 121 are both perpendicular to the normal direction of the second mounting surface 140.

[0066] Optionally, the extension direction of the second adjustment groove 311 is perpendicular to the extension direction of the fourth adjustment groove 121.

[0067] Furthermore, the second fastener 320 includes a second fastening bolt 321 and a second fastening nut 322. The second fastening bolt 321 passes through the second adjusting groove 311 and the fourth adjusting groove 121, and the second fastening nut 322 is sleeved on the second fastening bolt 321.

[0068] In use, tightening the second fastening bolt 321 causes the head of the second fastening bolt 321 to engage with the second fastening nut 322, clamping the second connecting member 310 and the second mounting member 120 together. This utilizes friction to fix the second connecting member 310 and the second mounting member 120 together. Conversely, loosening the second fastening bolt 321 removes the second connecting member 310 from the second mounting member 120, allowing it to move relative to the second mounting member 120 along the extension direction of the second adjusting groove 311 and / or the fourth adjusting groove 121. Thus, the second connecting member 310 is detachably connected to the second mounting member 120 via the second fastener 320.

[0069] For example, the second connector 310 is a connecting plate, and the second mounting member 120 is a mounting plate. Both the connecting plate and the mounting plate are parallel to the second mounting surface 140. The second fastening bolt 321 passes through the second adjusting groove 311 and the fourth adjusting groove 121 sequentially along the normal direction of the second mounting surface 140. When the second fastening bolt 321 is tightened, the head of the second fastening bolt 321 abuts against the side of the connecting plate opposite to the mounting plate, and the second fastening nut 322 abuts against the side of the mounting plate opposite to the connecting plate.

[0070] Furthermore, at least two second mounting brackets 300 are provided, and each second mounting bracket 300 is provided with two second connectors 310. The two second connectors 310 are detachably connected to the edge area of ​​the surface of the oil tank housing 100 facing the second mounting bracket 300. Each second mounting bracket 300 also includes a second crossbeam 330, which is connected to both second connectors 310.

[0071] Specifically, the second mounting members 120 are arranged in pairs on the edge region of the surface of the fuel tank housing 100 facing the second mounting bracket 300, that is, in pairs on the edge region of the second surface. The two second connecting members 310 in each second mounting bracket 300 are detachably connected to their respective second mounting members 120, and are simultaneously connected as a whole by the second crossbeam 330. At this point, the second connecting members 310 and the second mounting members 120 are small in size and light in weight, and can evenly bear force, thus firmly mounting the fuel tank housing 100 onto the common base.

[0072] For example, there are two second mounting brackets 300, which are located at opposite ends of the second surface.

[0073] Furthermore, a fourth connector 340 is provided on the second mounting bracket 300. The fourth connector 340 is connected to the second connector 310, and the fourth connector 340 is used to connect to the common base.

[0074] Specifically, the fourth connector 340 is directly connected to the second crossbeam 330, and then indirectly connected to the second connector 310 through the second crossbeam 330. The fourth connector 340 has mounting holes, and the common base is installed into the mounting holes of the fourth connector 340 using screws.

[0075] Please see Figure 2 In some embodiments, the first connector 210 is detachably connected to the top surface of the fuel tank housing 100, and the second connector 310 is detachably connected to the bottom surface of the fuel tank housing 100.

[0076] That is, the first mounting surface 130 is the top surface of the fuel tank housing 100, and the second mounting surface 140 is the bottom surface of the fuel tank housing 100.

[0077] In addition, a manhole 150 is provided on the side of the fuel tank housing 100, and a cover plate 160 is provided to cover the manhole 150.

[0078] Since the manhole 150 and the cover plate 160 avoid the surfaces where the first mounting bracket 200 and the second mounting bracket 300 are located, it is easy to inspect and clean the inside of the oil tank housing 100 without removing the main motor and the oil tank housing 100.

[0079] In contrast, in existing centrifugal compressor unit oil tank structures, the manhole 150 and cover 160 are typically installed on top of the oil tank housing 100. Thus, after the main motor is mounted on the top mounting bracket of the oil tank, the entire manhole 150 and cover 160 are located below the main motor, making subsequent maintenance, such as opening the cover 160 for inspection and cleaning of the oil tank interior, very inconvenient. Especially when personnel need to enter the oil tank for inspection and cleaning, the main motor must be removed to perform these operations.

[0080] In summary, the tank housing 100, the first mounting bracket 200, the second mounting bracket 300, and the cover plate 160 constitute a more flexible and versatile tank structure. Its modular assembly structure avoids the problems of narrow adjustment range and poor versatility associated with integral welding. The modular structure offers better adjustability and versatility, suitable for various main motors and common bases. Furthermore, by placing the manhole 150 and cover plate 160 on the side of the tank housing 100, the main motor installation avoids obstruction of the manhole 150 and cover plate 160, thus preventing them from being obstructed and affecting disassembly and assembly. This significantly improves the convenience of subsequent installation, commissioning, and maintenance of the centrifugal compressor unit.

[0081] This embodiment also provides a centrifugal compressor unit, including a main motor, a common base, and the aforementioned oil tank structure.

[0082] The main motor is connected to the first mounting bracket 200, specifically to the third connector 240. The common base is connected to the second mounting bracket 300, specifically to the fourth connector 340.

[0083] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0084] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0085] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A fuel tank structure, characterized in that, include: Fuel tank casing; A first mounting bracket, used for connection to the main motor, is provided with a first connecting member, which has a first adjusting groove. A first fastener passes through the adjusting groove, and the first connecting member is detachably connected to the oil tank housing via the first fastener. The second mounting bracket is used to connect with the common base. The second mounting bracket is provided with a second connector and a second adjustment groove. A second fastener is inserted into the second adjustment groove. The second connector is detachably connected to the fuel tank housing through the second fastener.

2. The fuel tank structure according to claim 1, characterized in that, The fuel tank housing is provided with a first mounting component, and the first mounting component is provided with a third adjustment groove, the extension direction of the third adjustment groove intersecting the extension direction of the first adjustment groove. The first fastener passes through the third adjustment groove, and the first connector is detachably connected to the first mounting component through the first fastener.

3. The fuel tank structure according to claim 2, characterized in that, The first fastener includes a first fastening bolt and a first fastening nut. The first fastening bolt passes through the first adjusting groove and the third adjusting groove, and the first fastening nut is sleeved on the first fastening bolt.

4. The fuel tank structure according to claim 2, characterized in that, The first mounting bracket is provided in at least two forms, and each first mounting bracket is provided with two first connectors. The two first connectors are detachably connected to the edge area of ​​the surface of the oil tank housing facing the first mounting bracket. Each first mounting bracket also includes a first crossbeam, which is connected to both first connectors.

5. The fuel tank structure according to claim 1, characterized in that, The fuel tank housing is provided with a second mounting component, and the second mounting component is provided with a fourth adjustment groove, the extension direction of the fourth adjustment groove intersecting the extension direction of the second adjustment groove; The second fastener passes through the fourth adjustment groove, and the second connector is detachably connected to the second mounting member through the second fastener.

6. The fuel tank structure according to claim 5, characterized in that, The second fastener includes a second fastening bolt and a second fastening nut. The second fastening bolt passes through the second adjusting groove and the fourth adjusting groove, and the second fastening nut is sleeved on the second fastening bolt.

7. The fuel tank structure according to claim 5, characterized in that, The second mounting bracket is provided in at least two forms, and each second mounting bracket is provided with two second connecting members. The two second connecting members are detachably connected to the edge area of ​​the surface of the oil tank housing facing the second mounting bracket. Each second mounting bracket also includes a second crossbeam, which is connected to both second connecting members.

8. The fuel tank structure according to any one of claims 1-7, characterized in that, The first mounting bracket is provided with a third connector, which is connected to the first connector and is used to connect to the main motor; and / or The second mounting bracket is provided with a fourth connector, which is connected to the second connector and is used to connect to the common base.

9. The fuel tank structure according to any one of claims 1-7, characterized in that, The first connector is detachably connected to the top surface of the fuel tank housing, and the second connector is detachably connected to the bottom surface of the fuel tank housing; The side of the fuel tank housing is provided with a manhole and a cover plate that fits over the manhole.

10. A centrifugal compressor unit, characterized in that, The system includes a main motor, a common base, and an oil tank structure as described in any one of claims 1-9, wherein the main motor is connected to the first mounting bracket, and the common base is connected to the second mounting bracket.

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