Screw air compressor device

Abstract

The invention relates to the technical field of air compressors, in particular to a screw air compressor device which comprises a motor and a motor shell, a motor rotor and a motor stator are coaxially arranged in the motor shell, both the motor rotor and the motor stator are filled with sealant, and an oil inlet is formed in the motor shell; the screw machine comprises a supporting shell, the supporting shell is fixedly arranged at the end, away from the oil inlet, of the motor shell, the supporting shell communicates with the motor shell, a screw is rotationally arranged in the supporting shell, one end of the screw is in transmission connection with the motor rotor, and an inlet and an outlet are formed in the supporting shell; the oil-gas separation barrel is communicated with the outlet; and one end of the oil cooling assembly communicates with the oil-gas separation barrel, and the other end of the oil cooling assembly communicates with the oil inlet. The manufacturing cost and the maintenance cost can be reduced, the cooling efficiency of the motor is improved, and meanwhile the emulsification phenomenon caused by supercooling of the oil gas barrel is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors, and in particular to a screw air compressor device. Background Art

[0002] In the prior art, the drive motors of screw air compressors are all cooled by air or water, and the most commonly used cooling method is the heat exchange cooling method of the partition wall. The partition wall cooling method has low efficiency and high manufacturing cost. In addition, when the screw air compressor is running at low load, since most coolers are not adjustable, it is easy to overcool the oil and gas barrel, causing the oil in the oil and gas barrel to emulsify.

[0003] Traditional screw air compressor devices require a strong seal between the screw and the motor to isolate the screw and the motor and prevent the oil and gas inside the screw from entering the motor. The seal is generally a skeleton oil seal, which is a wearing part and requires frequent maintenance and replacement, and the operation is complicated, which brings great inconvenience and high maintenance cost to the use of the oil-injected screw.

[0004] Therefore, a screw air compressor device is needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a screw air compressor device, which can reduce manufacturing costs and maintenance costs, improve the cooling efficiency of the motor, and prevent emulsification caused by overcooling of the oil and gas barrel.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The screw air compressor device comprises:

[0008] The motor comprises a motor housing, wherein a motor rotor and a motor stator are coaxially arranged in the motor housing, the motor rotor and the motor stator are both filled with sealant, and an oil inlet is opened on the motor housing;

[0009] A screw machine, the screw machine comprising a support shell, the support shell is fixedly arranged at one end of the motor housing away from the oil inlet, and the support shell is connected to the motor housing, a screw is rotatably arranged in the support shell, one end of the screw is drivingly connected to the motor rotor, and an inlet and an outlet are opened on the support shell;

[0010] An oil-gas separation barrel, the oil-gas separation barrel being in communication with the outlet;

[0011] An oil cooling assembly, one end of the oil cooling assembly is connected to the oil-gas separation barrel, and the other end of the oil cooling assembly is connected to the oil inlet.

[0012] In some embodiments, the motor further includes an output shaft, the output shaft is fixedly connected to the motor rotor coaxially, one end of the screw is transmission-connected to the output shaft coaxially, and the other end of the screw is supported on the support shell.

[0013] In some embodiments, a mounting groove is defined at one end of the output shaft, and one end of the screw rod is fixedly inserted into the mounting groove.

[0014] In some embodiments, a threaded hole is provided at one end of the screw rod that cooperates with the mounting slot, and a connecting hole connected to the mounting slot is provided on the output shaft. The connecting hole and the threaded hole are arranged opposite to each other, and a fastener passes through the connecting hole and is threadedly connected to the threaded hole.

[0015] In some embodiments, the oil-gas separation barrel is provided with an exhaust pipeline for discharging the separated product gas.

[0016] In some embodiments, the oil cooling assembly includes an oil pipeline and a cooler that are interconnected, the oil pipeline is connected to the oil-gas separation barrel, and the cooler is connected to the oil inlet.

[0017] In some embodiments, a plurality of heat dissipation fins are disposed on an outer surface of the cooler.

[0018] In some embodiments, the oil cooling assembly further includes a cooling fan, and the cooling fan is disposed on one side of the cooler.

[0019] In some embodiments, an air intake assembly is provided at the inlet of the support shell.

[0020] In some embodiments, a filter screen is disposed at one end of the air intake assembly that is in communication with the inlet of the support shell.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a screw air compressor device, in which a motor rotor and a motor stator are coaxially arranged in a motor housing, and the motor rotor and the motor stator are both filled with sealant. The screw machine includes a support housing, which is fixedly arranged at one end of the motor housing away from the oil inlet, and the support housing is connected to the motor housing, and a screw connected to the motor rotor is rotatably arranged in the support housing. The oil-gas separation barrel is connected to the oil cooling component and the outlet on the support housing, and the oil cooling component is connected to the oil inlet on the motor housing. By filling the stator and rotor of the motor with sealant, the cooled oil directly flows through the motor stator and the motor rotor for cooling, and the cooled oil enters the screw machine for compression, thereby achieving efficient cooling of the motor, and completely removing the skeleton oil seal between the motor and the screw machine, eliminating the maintenance cost of the skeleton seal, thereby reducing manufacturing cost and maintenance cost. And at low load, the cooled oil can use the heat generated by the motor to avoid overcooling of the oil-gas separation barrel and emulsification. Moreover, the oil in the oil-gas separation barrel is cooled by the cooling component and then enters the motor again to cool the motor, thereby realizing the circulation of the motor cooling oil, which can continuously cool the motor and ensure the stable operation of the screw air compressor device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 is a schematic diagram of a screw air compressor device of the present invention;

[0025] Figure 2 It is a cross-sectional view of the assembly of a screw machine and a motor in a screw air compressor device of the present invention.

[0026] In the figure:

[0027] 1. Motor; 11. Motor housing; 111. Oil inlet; 12. Motor rotor; 13. Motor stator; 14. Output shaft; 2. Screw machine; 21. Support housing; 211. Outlet; 22. Screw; 221. Threaded hole; 3. Oil-gas separation barrel; 4. Oil cooling assembly; 41. Oil pipeline; 42. Cooler; 43. Cooling fan; 5. Air intake assembly; 6. Filter; 7. Exhaust pipeline. DETAILED DESCRIPTION

[0028] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0029] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0030] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0031] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0033] In order to reduce the manufacturing and maintenance costs of screw air compressors, improve the cooling efficiency of motors, and prevent emulsification caused by overcooling of oil and gas barrels, Figure 1-Figure 2 As shown, the present invention provides a screw air compressor device. The screw air compressor device includes a motor 1, a screw machine 2, an oil-gas separation barrel 3 and an oil cooling component 4.

[0034] Among them, the motor 1 includes a motor housing 11, in which a motor rotor 12 and a motor stator 13 are coaxially arranged, and the motor rotor 12 and the motor stator 13 are both filled with sealant, and an oil inlet 111 is opened on the motor housing 11. Specifically, in this embodiment, the motor 1 is an inner rotor motor, and the motor rotor 12 is inserted into the motor stator 13. The screw machine 2 includes a support housing 21, which is fixedly arranged at one end of the motor housing 11 away from the oil inlet 111, and the support housing 21 is connected to the motor housing 11. A screw rod 22 is rotatably arranged in the support housing 21, and one end of the screw rod 22 is transmission-connected to the motor rotor 12, and an inlet and an outlet 211 are opened on the support housing 21. Specifically, the screw rod 22 is coaxially arranged with the motor rotor 12. The oil-gas separation barrel 3 is connected to the outlet 211 of the support housing 21. One end of the oil cooling component 4 is connected to the oil-gas separation barrel 3, and the other end of the oil cooling component 4 is connected to the oil inlet 111 of the motor housing 11.

[0035] By encapsulating the stator and rotor of the motor 1 with sealant, the cooled oil directly flows through the motor stator 13 and the motor rotor 12 for cooling, and the cooled oil then enters the screw machine 2 for compression, thereby achieving efficient cooling of the motor 1, and completely removing the skeleton oil seal between the motor 1 and the screw machine 2, saving the maintenance cost of the skeleton seal, thereby reducing manufacturing cost and maintenance cost. And at low load, the cooled oil can utilize the heat generated by the motor 1 to avoid overcooling of the oil and gas separation barrel 3 and emulsification. Moreover, the oil in the oil and gas separation barrel 3 is cooled by the cooling component and then enters the motor 1 again to cool the motor 1, realizing the circulation of the cooling oil of the motor 1, and can continuously cool the motor 1 to ensure the stable operation of the screw air compressor device.

[0036] In some embodiments, after the motor rotor 12 is encapsulated by the sealant, it is necessary to ensure the smoothness of the surface and reduce the friction loss between the motor rotor 12 and the cooling oil.

[0037] In some embodiments, the motor 1 further includes an output shaft 14, the output shaft 14 is fixedly connected to the motor rotor 12 coaxially, one end of the screw 22 is coaxially connected to the output shaft 14, and the other end of the screw 22 is supported on the support housing 21. By providing the output shaft 14, it is convenient for the motor rotor 12 to dock with the screw 22. In this embodiment, the output shaft 14 is fixedly penetrated in the motor rotor 12 to ensure that the output shaft 14 is stably connected to the motor rotor 12, so that the output shaft 14 can be driven to rotate synchronously during the rotation of the motor rotor 12. In other embodiments, part of the screw 22 structure can also be used as the output shaft 14, and the motor rotor 12 is used to directly drive the screw 22 to rotate, and no excessive restrictions are made here.

[0038] In some embodiments, a mounting groove is provided at one end of the output shaft 14, and one end of the screw rod 22 is fixedly inserted into the mounting groove. In this embodiment, the mounting groove is coaxially arranged with the output shaft 14. By providing the mounting groove, it can play a guiding and positioning role in the process of docking the output shaft 14 and the screw rod 22, ensuring that the screw rod 22 is coaxial with the mounting groove after docking. The mounting groove can be a square groove or a rectangular groove, etc., which can eliminate the rotation of the screw rod 22 relative to the output shaft 14 after docking the screw rod 22 with the output shaft 14. In other embodiments, a coupling can also be used to connect the output shaft 14 and the screw rod 22, and no excessive restrictions are made here.

[0039] In some embodiments, a threaded hole 221 is provided at one end of the screw rod 22 that matches the mounting groove, and a connecting hole connected to the mounting groove is provided on the output shaft 14, the connecting hole and the threaded hole 221 are arranged opposite to each other, and a fastener passes through the connecting hole and is threadedly connected to the threaded hole 221. Specifically, the fastener is a bolt. By using a fastener to connect the output shaft 14 and the screw rod 22, the stability of the connection between the screw rod 22 and the output shaft 14 can be further ensured, and the axial movement of the screw rod 22 relative to the output shaft 14 can be eliminated.

[0040] In some embodiments, an exhaust pipe 7 is provided on the oil-gas separation barrel 3 to discharge the separated product gas. By providing the exhaust pipe 7, the product gas can be guided to facilitate docking with subsequent equipment for use.

[0041] In some embodiments, the oil cooling assembly 4 includes an oil pipeline 41 and a cooler 42 that are interconnected, the oil pipeline 41 is connected to the oil-gas separation barrel 3, and the cooler 42 is connected to the oil inlet 111. Specifically, the oil pipeline 41 is connected to the lower end of the oil-gas separation barrel 3. After the oil and gas separation is completed in the oil-gas separation barrel 3, the oil is located at the lower end of the oil-gas separation barrel 3 and is transported to the cooler 42 through the oil pipeline 41 for heat dissipation and cooling. The oil that has completed heat dissipation and cooling enters the motor 1 again through the oil inlet 111 of the motor housing 11 to directly cool the motor rotor 12 and the motor stator 13. Through the above-mentioned arrangement, the oil can be recycled, and the motor 1 can be continuously cooled during the operation of the screw air compressor device, thereby ensuring the efficient operation of the screw air compressor device.

[0042] In some embodiments, a plurality of heat dissipation fins are provided on the outer surface of the cooler 42. By providing the heat dissipation fins, the heat exchange area between the cooler 42 and the outside air can be increased, thereby accelerating the heat exchange speed between the cooler 42 and the outside air, so that the oil flowing out of the oil-gas separation barrel 3 can be quickly dispersed, so that the cooled oil can enter the motor housing 11 again to cool the motor rotor 12 and the motor stator 13.

[0043] In some embodiments, the oil cooling assembly 4 further includes a cooling fan 43, which is disposed on one side of the cooler 42. By providing the cooling fan 43, the air flow near the cooler 42 can be accelerated, so that the oil in the cooler 42 can quickly exchange heat with the outside air, so that the heat of the oil can be quickly dissipated.

[0044] In some embodiments, an air intake assembly 5 is provided at the inlet of the support housing 21. The air intake assembly 5 is provided to facilitate docking with an upstream gas source, so that the upstream gas can smoothly enter the screw machine 2 for compression.

[0045] In some embodiments, a filter screen 6 is provided at one end of the air inlet assembly 5 that is connected to the inlet of the support housing 21. By providing the filter screen 6, the gas entering the screw machine 2 can be filtered, thereby excluding impurities from the screw machine 2 and preventing the screw machine 2 from being worn.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A screw air compressor device, characterized in that: include: The motor (1) comprises a motor housing (11), wherein a motor rotor (12) and a motor stator (13) are coaxially arranged in the motor housing (11), the motor rotor (12) and the motor stator (13) are both filled with sealing glue, and an oil inlet (111) is opened on the motor housing (11); A screw machine (2), the screw machine (2) comprising a support shell (21), the support shell (21) being fixedly arranged at one end of the motor housing (11) away from the oil inlet (111), and the support shell (21) being in communication with the motor housing (11), a screw (22) being rotatably arranged in the support shell (21), one end of the screw (22) being drivingly connected to the motor rotor (12), and an inlet and an outlet (211) being provided on the support shell (21); An oil-gas separation barrel (3), the oil-gas separation barrel (3) being in communication with the outlet (211); An oil cooling component (4), one end of the oil cooling component (4) is in communication with the oil-gas separation barrel (3), and the other end of the oil cooling component (4) is in communication with the oil inlet (111).

2. The screw air compressor device according to claim 1, characterized in that: The motor (1) further comprises an output shaft (14), wherein the output shaft (14) is fixedly connected coaxially with the motor rotor (12), one end of the screw rod (22) is transmission-connected coaxially with the output shaft (14), and the other end of the screw rod (22) is supported on the support housing (21).

3. The screw air compressor device according to claim 2, characterized in that: One end of the output shaft (14) is provided with a mounting groove, and one end of the screw rod (22) is fixedly inserted into the mounting groove.

4. The screw air compressor device according to claim 3, characterized in that: A threaded hole (221) is formed at one end of the screw rod (22) that cooperates with the mounting groove, and a connecting hole that communicates with the mounting groove is formed on the output shaft (14). The connecting hole and the threaded hole (221) are arranged opposite to each other, and a fastener passes through the connecting hole and is threadedly connected to the threaded hole (221).

5. The screw air compressor device according to claim 1, characterized in that: The oil-gas separation barrel (3) is provided with an exhaust pipeline (7) for exhausting the separated product gas.

6. The screw air compressor device according to claim 1, characterized in that: The oil cooling assembly (4) comprises an oil pipeline (41) and a cooler (42) which are connected to each other, the oil pipeline (41) is connected to the oil-gas separation barrel (3), and the cooler (42) is connected to the oil inlet (111).

7. The screw air compressor device according to claim 6, characterized in that: The outer surface of the cooler (42) is provided with a plurality of heat dissipation fins.

8. The screw air compressor device according to claim 6, characterized in that: The oil cooling assembly (4) further comprises a heat dissipation fan (43), and the heat dissipation fan (43) is arranged on one side of the cooler (42).

9. The screw air compressor device according to claim 1, characterized in that: An air intake assembly (5) is provided at the inlet of the support shell (21).

10. The screw air compressor device according to claim 9, characterized in that: A filter screen (6) is provided at one end of the air intake assembly (5) that is in communication with the inlet of the support shell (21).

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