Totally enclosed screw compressor and method of assembly

Abstract

The application discloses a totally-enclosed screw compressor, which comprises a tank body, a flange, a motor and a compression assembly, an oil inlet interface is arranged on the side wall of the tank body, the flange is fixedly connected to the inner circumferential wall of the tank body, the flange is provided with a mounting hole, the mounting hole is arranged in correspondence with the oil inlet interface, the motor and the compression assembly are both mounted in the tank body, the compression assembly comprises a casing and a screw assembly, the screw assembly is mounted in the casing, the motor is connected with the screw assembly and drives the screw assembly to rotate, a connecting part is arranged on the casing, the connecting part is connected with the flange through bolts to realize the fixation of the casing, a sealing element is arranged between the connecting part and the flange, and the motor is eccentrically arranged on one side close to the mounting hole. The application can avoid misplacement or deviation during installation, so that the installation personnel can more quickly and accurately align the mounting hole with the oil inlet interface, the alignment during installation is facilitated, the precision during the assembly of parts can be improved, the convenience and reliability during the installation process are improved, misassembly is prevented, and time is saved.

Description

Technical Field

[0001] This application relates to the field of screw compressor technology, specifically a fully enclosed screw compressor and its assembly method. Background Technology

[0002] A screw compressor is a mechanical device that compresses gases, supporting the pneumatic drive of various industrial equipment to pressurize and transport gases. Screw compressors play a vital role in multiple fields, including industrial manufacturing, refrigeration and air conditioning systems, petrochemicals, food and pharmaceuticals, and the energy industry.

[0003] In the existing technology, screw compressors are prone to misalignment or displacement of interfaces during installation due to unclear interface positions and lack of guidance. This makes installation difficult for users, leads to incorrect assembly, repeated assembly, wastes time and costs, and reduces work efficiency.

[0004] Therefore, the structure of existing screw compressors has room for further improvement. Summary of the Invention

[0005] In view of this, and in response to the technical problems of difficult interface positioning and easy mis-installation during the installation of screw compressors in the prior art, this application provides a fully enclosed screw compressor and its assembly method. By changing the structure of the screw compressor, the accuracy of component assembly can be improved, the convenience and reliability of the installation process can be enhanced, mis-assembly can be prevented, the efficiency of user installation can be improved, time can be saved, and component damage and maintenance costs caused by installation errors can be reduced.

[0006] To achieve the above objectives, this application provides the following technical solution: a fully enclosed screw compressor, comprising:

[0007] The tank body has an oil inlet on its side wall;

[0008] A flange is fixedly connected to the inner peripheral wall of the tank; the flange is provided with mounting holes, which are correspondingly set with the oil inlet interface.

[0009] The motor and the compression assembly are both installed inside the tank; the compression assembly includes a housing and a screw assembly, the screw assembly is installed in the housing, and the motor is connected to the screw assembly and drives the screw assembly to rotate;

[0010] The housing is provided with a connecting part, which is connected to the flange by bolts to fix the housing;

[0011] A sealing element is provided between the connecting part and the flange;

[0012] The motor is eccentrically positioned on the side closest to the mounting hole.

[0013] Compared to existing technologies, screw compressors require a one-to-one alignment of mounting holes with the oil inlet to prevent misalignment or offset during installation. By setting the motor eccentrically closer to the oil inlet, it provides positioning and guidance during installation, allowing installers to quickly and accurately align the mounting holes with the oil inlet. This improves the precision of component assembly, enhances the convenience and reliability of the installation process, prevents misassembly, increases user installation efficiency, saves time, and reduces component damage and maintenance costs caused by installation errors. Furthermore, the inclusion of seals effectively prevents gas leakage, ensuring gas tightness between the various chambers within the compressor, thereby guaranteeing the normal operation and high efficiency of the screw compressor.

[0014] Preferably, the housing is provided with a lubricating oil passage, which is connected to the mounting hole and is used for lubricating the screw assembly.

[0015] In this embodiment, by using the mounting hole of the flange to correspond to the oil inlet of the tank, it can be ensured that the oil from the oil filter can flow accurately into the lubrication channel to lubricate the screw assembly, thereby reducing the friction and wear of the screw assembly during rotation, making the screw assembly work more smoothly, and improving the working efficiency and performance of the screw assembly.

[0016] Preferably, the housing is provided with an upwardly extending connecting frame, the motor is installed in the connecting frame, and the distance between the connecting frame located on the side of the motor that is eccentrically positioned and the flange is L;

[0017] Where 1mm < L < 2mm.

[0018] In this embodiment, by setting a reasonable gap, direct contact between the motor connecting bracket and the flange can be avoided, thus preventing wear or damage to the motor caused by contact with the flange during rotation and improving the stability and reliability of the screw compressor.

[0019] Preferably, the connecting frame, connecting part and housing are integrally formed.

[0020] In this embodiment, the one-piece molding structure can enhance the overall strength, avoid poor strength at the joint due to gaps generated during assembly, reduce the assembly complexity of the casing and save time, improve production efficiency and work efficiency, and reduce manufacturing costs.

[0021] Preferably, the tank sidewall is also provided with a gas replenishment and enthalpy enhancement interface and a compression chamber liquid injection interface. The gas replenishment and enthalpy enhancement interface is located on one side of the oil inlet interface, and the compression chamber liquid injection interface is located on the side of the gas replenishment and enthalpy enhancement interface away from the oil inlet interface.

[0022] The flange is also provided with a first connection hole and a second connection hole corresponding to the gas replenishment and enthalpy increase interface and the compression chamber liquid injection interface, for positioning during flange installation.

[0023] In this embodiment, when the flange is installed, the first connection hole of the flange corresponds to the gas injection and enthalpy increase interface of the tank, the second connection hole of the flange corresponds to the liquid injection interface of the compression chamber of the tank, and the mounting hole of the flange corresponds to the oil inlet interface of the tank. This achieves a one-to-one correspondence between multiple hole positions, which can ensure the accuracy and stability of flange installation, prevent misassembly, improve the efficiency of user installation, save time, and reduce component damage and maintenance costs caused by installation errors.

[0024] Preferably, the housing is further provided with a replenishment air channel and a liquid jet channel, the replenishment air channel being connected to the first connecting hole and the liquid jet channel being connected to the second connecting hole;

[0025] The screw assembly has a bearing at the end furthest from the motor.

[0026] In this embodiment, the air supply channel is used for intermediate air supply to improve performance under high pressure ratio operation and achieve the effect of air supply and enthalpy increase, while the liquid injection channel is used to control the exhaust temperature.

[0027] Preferably, the tank body is provided with a top cover, a cylindrical body, and a bottom cover in sequence from top to bottom, and the flange is welded to the inner wall of the cylindrical body;

[0028] The top cover, cylinder body, and bottom cover are connected in sequence to form a closed shell.

[0029] In this embodiment, the enclosed shell structure can effectively prevent external impurities from entering the tank.

[0030] Preferably, the top cover is provided with an inlet, and the cylinder body is provided with an outlet, with the inlet and outlet respectively connected to the interior of the tank;

[0031] The outlet is located directly below the inlet.

[0032] In this embodiment, the inlet is used to draw in the medium, and the outlet is used to discharge the compressed medium, ensuring that the medium can flow in or out smoothly, such as gas.

[0033] Preferably, the end of the housing facing the motor is provided with an inlet communicating with the inlet, and the end of the screw assembly away from the motor is provided with an outlet communicating with the outlet, and the outlet is located below the outlet;

[0034] The casing has an oil-gas separator installed at the exhaust port. The outer wall of the casing has a circumferential plate extending toward the inner wall of the tank. The circumferential plate is connected to the oil-gas separator by bolts to fix the oil-gas separator.

[0035] In this embodiment, the exhaust port is located below the outlet, which helps to separate and discharge oil and gas, reducing the impact on compressor performance.

[0036] An assembly method for a fully enclosed screw compressor, comprising the aforementioned fully enclosed screw compressor, includes the following steps:

[0037] Align the flange mounting holes with the oil inlet ports of the tank and install them accordingly;

[0038] The motor and compressor assembly are assembled to form the first component;

[0039] The first component is connected and fixed to the cylinder body to form the second component;

[0040] Connect the second component to the top cover and bottom cover respectively, and tighten them in sequence to complete the assembly. Attached Figure Description

[0041] Figure 1 A three-dimensional structural schematic diagram of a fully enclosed screw compressor and assembly method provided in an embodiment of this application;

[0042] Figure 2 A partial structural schematic diagram of a fully enclosed screw compressor and its assembly method provided in an embodiment of this application. Figure 1 ;

[0043] Figure 3 A partial structural schematic diagram of a fully enclosed screw compressor and its assembly method provided in an embodiment of this application. Figure 2 ;

[0044] Figure 4 This is a schematic diagram of the compression assembly in a fully enclosed screw compressor and assembly method provided in an embodiment of this application;

[0045] Figure 5 A front view of a fully enclosed screw compressor and assembly method provided in an embodiment of this application;

[0046] Figure 6 for Figure 5 A schematic diagram of the AA cross-sectional structure in the diagram;

[0047] Figure 7 A top view schematic diagram of a fully enclosed screw compressor and its assembly method is provided for one embodiment of this application;

[0048] Figure 8 for Figure 7 Schematic diagram of the CC cross-section structure in the image;

[0049] Figure 9 for Figure 7 Schematic diagram of the DD cross-sectional structure in the middle;

[0050] Figure 10 This is an exploded structural diagram of the oil-gas separator in a fully enclosed screw compressor and assembly method provided in an embodiment of this application.

[0051] In the diagram: 1. Tank; 2. Motor; 3. Compression assembly; 4. Flange; 5. Inlet box; 6. Oil filter; 7. Seals;

[0052] 11. Oil inlet port; 12. Gas replenishment and enthalpy enhancement port; 13. Compression chamber liquid injection port; 14. Suction chamber; 15. Discharge chamber; 16. Top cover; 17. Cylinder body; 18. Bottom cover; 19. Oil storage chamber; 31. Housing; 32. Screw assembly; 33. Oil-gas separator; 35. Check valve; 36. Circumferential plate; 37. Connecting part; 38. Connecting frame; 41. Mounting hole; 42. First connecting hole; 43. Second connecting hole;

[0053] 161. Inlet; 171. Outlet; 311. Lubricating oil passage; 312. Make-up air passage; 313. Liquid injection passage; 314. Suction port; 331. Cylinder; 332. Filter; 333. First filter plate; 334. Second filter plate; 381. Air inlet;

[0054] 3331, filter hole; 3311, through hole. Detailed Implementation

[0055] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0056] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0057] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0058] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 10 illustrate.

[0059] This embodiment provides a fully enclosed screw compressor, which is applied in the field of compressor technology, specifically, as follows: Figures 1 to 10 As shown, the assembly includes a tank 1, an oil filter 6, a flange 4, a junction box 5, a motor 2, and a compression assembly 3. The junction box 5 is located on the outer wall of the tank 1 and is used to supply power to the motor 2 after wiring. The side wall of the tank 1 is provided with an oil inlet 11, which includes a connector located on the outer periphery of the flange 4. The connector is used to transport oil from the oil filter 6 to the housing 31. The oil filter 6 has an oil inlet and an oil outlet and is located on the outer side of the tank 1. The flange 4 is fixedly connected to the inner periphery of the tank 1 and has a mounting hole 41. The mounting hole 41 is connected to the oil outlet of the oil filter 6 and is correspondingly provided with the oil inlet 11. The motor 2 and the compression assembly 3 are both installed inside the tank 1. The compression assembly 3 includes a housing 31 and a screw assembly 32. The screw assembly 32 is installed in the housing 31, and the motor 2 is connected to the screw assembly 32 and drives the screw assembly 32 to rotate. The housing 31 is provided with a connecting part 37, which is connected to the flange 4 by bolts to fix the housing 31. That is, the flange 4 is detachably connected to the connecting part 37 by bolts. When it is necessary to disassemble or maintain the motor 2, the motor 2 can be disassembled and assembled by turning the bolts. The operation is simple and reduces maintenance and production costs. Among them, a sealing element 7 is provided between the connecting part 37 and the flange 4. By setting the sealing element 7, gas leakage can be effectively prevented, ensuring the gas sealing between the various cavities in the tank 1, thereby ensuring the normal operation and efficient operation of the screw compressor.

[0060] like Figure 2 , Figure 3 , Figure 6 , Figure 8 , Figure 9 As shown, the motor 2 is eccentrically positioned on the side closest to the mounting hole 41. When installing the screw compressor, the mounting hole 41 needs to correspond one-to-one with the oil inlet interface 11 to avoid misalignment or offset during installation. By setting the eccentric setting, it can play a positioning and guiding role during installation, enabling installers to align the mounting hole 41 with the oil inlet interface 11 more quickly and accurately. This facilitates alignment during installation, improves the accuracy of component assembly, enhances the convenience and reliability of the installation process, prevents misassembly, improves the efficiency of user installation, saves time, and reduces component damage and maintenance costs caused by installation errors.

[0061] Specifically, such as Figure 6As shown, the housing 31 is provided with a lubricating oil passage 311, which is connected to the mounting hole 41. The lubricating oil passage 311 is used to lubricate the screw assembly 32. Through the mounting hole 41 of the flange 4 corresponding to the oil inlet 11 of the tank body 1, it can be ensured that the oil from the oil filter 6 can flow accurately into the lubricating oil passage 311 to lubricate the screw assembly 32, thereby reducing the friction and wear of the screw assembly 32 during rotation, making the screw assembly 32 work more smoothly, and improving the working efficiency and performance of the screw assembly 32.

[0062] Furthermore, such as Figure 1 As shown, the side wall of tank 1 is also provided with a gas replenishment and enthalpy enhancement interface 12 and a compression chamber liquid injection interface 13. The gas replenishment and enthalpy enhancement interface 12 is located on one side of the oil inlet interface 11, and the compression chamber liquid injection interface 13 is located on the side of the gas replenishment and enthalpy enhancement interface 12 away from the oil inlet interface 11. Both the gas replenishment and enthalpy enhancement interface 12 and the compression chamber liquid injection interface 13 include a connector located on the outside of the flange 4. The flange 4 is also provided with a first connecting hole 42 and a second connecting hole 43 corresponding to the gas replenishment and enthalpy enhancement interface 12 and the compression chamber liquid injection interface 13, for positioning during flange 4 installation. The tank 1 is provided with a through hole 3311 for installing the oil inlet interface 11, the gas replenishment and enthalpy enhancement interface 12, and the compression chamber liquid injection interface 13.

[0063] When flange 4 is installed, the first connection hole 42 of flange 4 corresponds to the gas replenishment and enthalpy increase interface 12 of tank body 1, the second connection hole 43 of flange 4 corresponds to the liquid injection interface 13 of compression chamber of tank body 1, and the mounting hole 41 of flange 4 corresponds to the oil inlet interface 11 of tank body 1. This achieves a one-to-one correspondence of multiple hole positions, which can ensure the accuracy and stability of flange 4 installation, prevent misassembly, improve the efficiency of user installation, save time, and reduce component damage and maintenance costs caused by installation errors.

[0064] Among them, such as Figures 8 to 9 As shown, the housing 31 is also provided with a supplementary air flow channel 312 and a liquid jet flow channel 313. The supplementary air flow channel 312 is connected to the first connecting hole 42, and the liquid jet flow channel 313 is connected to the second connecting hole 43. The end of the screw assembly 32 away from the motor 2 is provided with a bearing. The bearing plays a supporting role and reduces friction, ensuring the stability and reliability of the screw assembly 32 during high-speed rotation in the working process. The supplementary air flow channel 312 is used for intermediate air supply, which improves the performance under high pressure ratio operation and plays a role in air supply and enthalpy increase. The liquid jet flow channel 313 is used to control the exhaust temperature.

[0065] Furthermore, such as Figures 2 to 3As shown, the housing 31 is provided with an upwardly extending connecting bracket 38. The motor 2 is installed in the connecting bracket 38. The connecting bracket 38 is used to fix the motor 2 and prevent the motor 2 from shaking or falling off during use. The distance between the connecting bracket 38 located on the eccentric side of the motor 2 and the flange 4 is L, where 1mm < L < 2mm. By setting a reasonable gap, direct contact between the motor 2 connecting bracket 38 and the flange 4 can be avoided, and wear or damage caused by the motor 2 touching the flange 4 during rotation can be avoided, thereby improving the stability and reliability of the screw compressor.

[0066] Among them, the connecting frame 38, the connecting part 37 and the housing 31 are integrally formed. The integrally formed structure can enhance the overall strength, avoid poor strength at the connection due to gaps generated during assembly, reduce the assembly complexity of the housing 31 and save time, improve production efficiency and work efficiency, and reduce manufacturing costs.

[0067] Furthermore, such as Figure 1 , Figure 5 As shown, the tank body 1 is provided with a top cover 16, a cylindrical body 17, and a bottom cover 18 in sequence from top to bottom. The flange 4 is welded to the inner wall of the cylindrical body 17. The top cover 16, the cylindrical body 17, and the bottom cover 18 are connected in sequence to form a closed shell. The closed shell structure can effectively prevent external impurities from entering the interior of the tank body 1. The top cover 16 and the cylindrical body 17 are detachably connected, and the bottom cover 18 and the cylindrical body 17 are detachably connected. The detachable connection can facilitate the user to disassemble and assemble the compressor, making maintenance more convenient and improving work efficiency.

[0068] Among them, such as Figure 1 , Figure 5 As shown, the top cover 16 is provided with an inlet 161, and the cylinder 17 is provided with an outlet 171. The inlet 161 and the outlet 171 are respectively connected to the inside of the tank 1. The outlet 171 is located directly below the inlet 161 and is located on the side wall of the cylinder 17. The inlet 161 is located on the side wall of the top cover 16. The inlet 161 is used to draw in the medium, and the outlet 171 is used to discharge the compressed medium, ensuring that the medium can flow in or out smoothly. The medium is, for example, gas.

[0069] Furthermore, such as Figures 3 to 4 As shown, the end of the housing 31 facing the motor 2 is provided with an intake port 314 that communicates with the inlet 161, ensuring that gas can smoothly enter the screw assembly 32 for compression. The end of the screw assembly 32 away from the motor 2 is provided with an exhaust port that communicates with the outlet 171. The exhaust port is located below the outlet 171 and on the side wall of the bearing, which helps to separate and discharge oil and gas, reduce the impact on the performance of the compressor, and ensure that the gas is smoothly discharged into the cylinder 331 after being compressed from the screw assembly 32. This helps to reduce the resistance when the gas is discharged, making the gas flow more smoothly and further improving the working efficiency of the screw compressor.

[0070] like Figure 2 , Figure 3 , 10 As shown, an oil-gas separator 33 is installed at the exhaust port of the housing 31. The oil-gas separator 33 is used to filter the gas discharged from the exhaust port. A circumferential plate 36 extending into the inner wall of the tank 1 is provided on the outer side wall of the housing 31. The circumferential plate 36 is connected to the oil-gas separator 33 by bolts to fix the oil-gas separator 33. The bolt connection facilitates the disassembly and installation of the oil-gas separator 33. The circumferential plate 36 is integrally formed with the housing 31, which facilitates installation and maintenance, and also enhances the structural strength of the housing 31, enabling it to better withstand the vibration and impact generated during the operation of the compressor.

[0071] The oil-gas separator 33 includes a cylinder 331 fitted onto the housing 31 and a filter 332 fitted onto the outside of the cylinder 331. The cross-sectional shape of the cylinder 331 is designed according to the cross-sectional shape of the tank 1. The exhaust port is connected to the inside of the cylinder 331. The filter 332 is used to filter the gas inside the cylinder 331. By adopting the combined design of the cylinder 331 and the filter 332, the structure of the oil-gas separator 33 is simple, which can reduce the complexity of gas flow inside the compressor tank 1, reduce the generation of gas resistance, ensure the smoothness of gas delivery, and at the same time avoid abnormal pressure rise inside the gas chamber, improve the overall operating efficiency, stability and service life of the compressor, thereby reducing the manufacturing difficulty, production cost and maintenance cost of the compressor.

[0072] like Figure 10 As shown, the side wall of the cylinder 331 is provided with a plurality of spaced through holes 3311. The through holes 3311 are circular in shape and are located below the outlet 171 and connected to the exhaust port. The through holes 3311 are located at one end of the cylinder 331 near the outlet 171. The filter 332 is located on the outside of the corresponding through hole 3311, that is, the filter 332 is eccentrically located near the outlet 171 of the through hole 3311, so that the oil can drip quickly from the filter 332 into the oil storage chamber 19 under the action of gravity. The gas enters the filter 332 through the exhaust port and the through hole 3311 to achieve gas filtration, ensuring effective separation of oil and gas and improving filtration efficiency.

[0073] Furthermore, such as Figure 10As shown, the oil-gas separator 33 also includes a first filter plate 333 and a second filter plate 334. A filter 332 is located between the first filter plate 333 and the second filter plate 334. The shapes of the first filter plate 333 and the second filter plate 334 are the same as the shape of the filter 332. The outline shape of the filter 332 is the same as the outline shape of the cylinder 331. The outer side of the filter 332 is basically in contact with the inner wall of the tank 1. The circumferential plate 36 is connected to the first filter plate 333 by bolts to fix the oil-gas separator 33. After the circumferential plate 36 is fixed to the first filter plate 333, the top of the cylinder 331 is sealed by the circumferential plate 36, which can prevent the oil-gas mixture inside the cylinder 331 from flowing out from the top of the cylinder 331, ensuring that the oil-gas mixture can only be discharged after being filtered by the filter 332, thus improving the filtration effect and the overall performance of the compressor.

[0074] The first filter plate 333 and the second filter plate 334 are each provided with multiple filter holes 3331. The filter holes 3331 are similar to ellipses. The filter holes 3331 of the first filter plate 333 are used to discharge gas, and the filter holes 3331 of the second filter plate 334 are used to discharge oil, so as to realize bidirectional discharge after gas-liquid separation, avoid gas-liquid mixing and backflow, reduce mutual interference, and be more conducive to oil-gas separation. At the same time, the first filter plate 333 and the second filter plate 334 can firmly clamp the filter 332 to prevent the filter 332 from moving or deforming during operation, and ensure the stability of the filter 332.

[0075] Furthermore, a one-way valve 35 is installed at the exhaust port. The one-way valve 35 is located inside the cylinder 331. The one-way valve 35 is used to prevent gas from flowing back into the compressor when the compressor is turned off. The one-way valve 35 can prevent gas from flowing back into the compression chamber and ensure that the gas can only flow into the cylinder 331 in one direction.

[0076] The gas flow path is as follows: the gas enters the tank 1 from the inlet 161, then enters the screw assembly 32 from the suction port 314, is compressed by the screw assembly 32, is discharged from the exhaust port into the cylinder 331, flows into the filter 332, is filtered by the filter 332, and is discharged from the outlet 171. The gas flow path in the oil-gas separator 33 is simple. Compared with the traditional complex multi-stage annular partition design, the fully enclosed screw compressor of this application can reduce the resistance and path complexity of gas flow, making the gas flow smoother and improving the overall efficiency of the compressor.

[0077] Among them, such as Figure 4As shown, the connecting frame 38 is provided with multiple spaced air inlets 381. The air inlets 381 are semi-circular or arched structures. The air inlets 381 are connected to the suction port 314. The multiple spaced air inlets 381 can disperse the airflow pressure, reduce airflow impact and turbulence, reduce airflow resistance and noise, ensure uniform airflow at the suction port 314 of the housing 31, and improve the pump's suction performance and stability. In the vertical direction, the highest point of the air inlet 381 is higher than the highest point of the flange 4.

[0078] Among them, such as Figure 6 , Figure 8 , Figure 9 As shown, the outer side of flange 4 is welded to the inner circumferential wall of cylinder 17, and flange 4 is located above oil-gas separator 33. The cavity on the upper side of flange 4 serves as suction chamber 14, which is connected to inlet 161. The cavity between the lower side of flange 4 and the upper side of oil-gas separator 33 serves as discharge chamber 15, which is connected to outlet 171. The cavity on the lower side of oil-gas separator 33 serves as oil storage chamber 19, which is used to store oil after gas separation. By setting different cavities, the internal space of the compressor can be reasonably divided, making gas flow and oil storage more orderly, ensuring that the gas can flow in the compressor according to a predetermined path, avoiding chaos and backflow, and improving the working efficiency and stability of the compressor.

[0079] The gas flow path is as follows: the gas enters the suction chamber 14 inside the tank 1 from the inlet 161, and then enters the screw assembly 32 from the suction port 314. It is compressed by the screw assembly 32 and discharged from the exhaust port into the oil-gas separator 33. After being filtered by the oil-gas separator 33, the gas enters the discharge chamber 15 and is discharged from the outlet 171. The oil drips into the oil storage chamber 19.

[0080] like Figure 1 , Figure 6 , Figure 8 , Figure 9 As shown, the tank body 1 has an oil return port at the position of the oil storage chamber 19. The oil return port is connected to the oil inlet of the oil filter 6. The oil outlet of the oil filter 6 is connected to the mounting hole 41 provided on the tank body 1. The mounting hole 41 is connected to the lubricating oil passage 311 in the housing 31. The pressure of the discharge chamber 15 forces the oil in the oil storage chamber 19 into the oil filter 6 and into the lubricating oil passage 311 through the mounting hole 41.

[0081] Furthermore, the motor 2 and the compression assembly 3 are connected to form the first assembly, and the first assembly is connected to the cylinder body 17 to form the second assembly. After the second assembly is connected to the top cover 16 and the bottom cover 18, the first assembly is enclosed and installed inside, so as to achieve a compact and enclosed overall structure, which facilitates the convenience of production, manufacturing and installation.

[0082] This application also provides an assembly method for a fully enclosed screw compressor, comprising the following steps:

[0083] Align the mounting hole 41 of flange 4 with the oil inlet port 11 of tank body 1 and install it accordingly;

[0084] The motor 2 and the compression assembly 3 are assembled to form the first assembly;

[0085] The first component is connected and fixed to the cylinder body 17 to form the second component;

[0086] Connect the second component to the top cover 16 and the bottom cover 18 respectively, and tighten them in sequence to complete the assembly.

[0087] During installation, the first component is installed first, and then the entire first component is inserted into the cylinder 17 from the bottom upwards (i.e., the second component is installed). The flange 4 is fixed to the connecting part 37 with bolts. After the second component is connected to the top cover 16 and the bottom cover 18, the first component is sealed and installed inside, thus completing the installation. When disassembling, simply open the top cover 16 and the bottom cover 18, unscrew the bolts, and pull the entire first component downwards to achieve quick disassembly.

[0088] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A fully enclosed screw compressor, characterized in that, include: Tank body (1), with an oil inlet (11) on the side wall; Flange (4) is fixedly connected to the inner circumferential wall of tank body (1); the flange (4) is provided with mounting hole (41), and the mounting hole (41) is correspondingly set with oil inlet interface (11); The motor (2) and the compression assembly (3) are both installed inside the tank (1); the compression assembly (3) includes a housing (31) and a screw assembly (32), the screw assembly (32) is installed in the housing (31), the motor (2) is connected to the screw assembly (32) and drives the screw assembly (32) to rotate; The housing (31) is provided with a connecting part (37), which is connected to the flange (4) by bolts to fix the housing (31); A sealing element (7) is provided between the connecting part (37) and the flange (4); The motor (2) is eccentrically positioned on the side near the mounting hole (41); The housing (31) is provided with an upwardly extending connecting frame (38), and the motor (2) is installed in the connecting frame (38). The distance between the connecting frame (38) located on the side of the motor (2) that is eccentrically positioned and the flange (4) is L. Where 1mm < L < 2mm.

2. The fully enclosed screw compressor according to claim 1, characterized in that, The housing (31) is provided with a lubrication channel (311), which is connected to the mounting hole (41). The lubrication channel (311) is used to lubricate the screw assembly (32).

3. The fully enclosed screw compressor according to claim 1, characterized in that, The connecting frame (38), connecting part (37) and housing (31) are integrally formed.

4. The fully enclosed screw compressor according to claim 1, characterized in that, The side wall of the tank (1) is also provided with a gas replenishment and enthalpy enhancement interface (12) and a compression chamber liquid injection interface (13). The gas replenishment and enthalpy enhancement interface (12) is located on one side of the oil inlet interface (11), and the compression chamber liquid injection interface (13) is located on the side of the gas replenishment and enthalpy enhancement interface (12) away from the oil inlet interface (11). The flange (4) is also provided with a first connection hole (42) and a second connection hole (43) corresponding to the gas replenishment and enthalpy increase interface (12) and the compression chamber liquid injection interface (13), for positioning of the flange (4) during installation.

5. The fully enclosed screw compressor according to claim 4, characterized in that, The housing (31) is also provided with a supplementary airflow channel (312) and a liquid jet channel (313). The supplementary airflow channel (312) is connected to the first connecting hole (42), and the liquid jet channel (313) is connected to the second connecting hole (43). The screw assembly (32) has a bearing at the end away from the motor (2).

6. The fully enclosed screw compressor according to claim 1, characterized in that, The tank body (1) is provided with a top cover (16), a cylindrical body (17), and a bottom cover (18) in sequence from top to bottom. The flange (4) is welded to the inner wall of the cylindrical body (17). The top cover (16), the cylinder body (17), and the bottom cover (18) are connected in sequence to form a closed shell.

7. The fully enclosed screw compressor according to claim 6, characterized in that, The top cover (16) is provided with an inlet (161), and the cylinder (17) is provided with an outlet (171). The inlet (161) and the outlet (171) are respectively connected to the inside of the tank (1); The outlet (171) is located directly below the inlet (161).

8. The fully enclosed screw compressor according to claim 7, characterized in that, The housing (31) has an intake port (314) communicating with the inlet (161) at the end facing the motor (2), and the screw assembly (32) has an exhaust port communicating with the outlet (171) at the end away from the motor (2). The exhaust port is located below the outlet (171). The housing (31) is equipped with an oil-gas separator (33) at the exhaust port. The outer side wall of the housing (31) is provided with a circumferential plate (36) extending toward the inner wall of the tank (1). The circumferential plate (36) is connected to the oil-gas separator (33) by bolts to fix the oil-gas separator (33).

9. A method for assembling a fully enclosed screw compressor, comprising the fully enclosed screw compressor as described in claims 1-8, characterized in that, Includes the following steps: The mounting holes (41) of the flange (4) are aligned with the oil inlet (11) of the tank body (1), and then installed. The motor (2) and the compression assembly (3) are assembled to form the first assembly; The first component is connected and fixed to the cylinder body (17) to form the second component; Connect the second component to the top cover (16) and the bottom cover (18) respectively, tighten them in sequence to complete the assembly.

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