Screw air compressor device

Abstract

The utility model 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. According to the utility model, the manufacturing cost and the maintenance cost can be reduced, the cooling efficiency of the motor is improved, and the emulsification phenomenon caused by supercooling of the oil-gas barrel is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to air compressor technology field especially relates to a screw air compressor device. BACKGROUND

[0002] In prior art, the driving motor of screw air compressor device adopts air cooling or water cooling, and the commonly used is the interwall heat exchange cooling mode. The interwall cooling mode has low efficiency and high manufacturing cost. In addition, when the screw air compressor device operates at low load, the oil gas bucket is easily supercooled and the oil in the oil gas bucket is emulsified because most of the coolers are not adjustable.

[0003] The conventional screw air compressor device needs strong sealing between the screw and the motor to isolate the screw and the motor, so as to prevent the oil and gas in the screw from entering the motor. The sealing is generally a skeleton oil seal, which is a vulnerable part and is frequently replaced and operated complicatedly, which brings great inconvenience and high maintenance cost to the use of the oil injection screw.

[0004] Therefore, a screw air compressor device is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a screw air compressor device, which can reduce the manufacturing cost and maintenance cost, improve the cooling efficiency of the motor, and prevent the emulsification phenomenon caused by the supercooling of the oil gas bucket.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The screw air compressor device comprises:

[0008] A motor comprises a motor shell, a motor rotor and a motor stator are coaxially arranged in the motor shell, the motor rotor and the motor stator are both filled with sealing glue, and an oil inlet is formed in the motor shell;

[0009] A screw machine comprises a support shell, the support shell is fixedly arranged at one end of the motor shell away from the oil inlet, the support shell is communicated with the motor shell, a screw is rotatably arranged in the support shell, one end of the screw is drivingly connected with the motor rotor, and an inlet and an outlet are formed in the support shell;

[0010] An oil gas separation bucket is communicated with the outlet;

[0011] An oil cooling assembly is communicated with the oil gas separation bucket at one end, and communicated with the oil inlet at the other end.

[0012] In some embodiments, the motor further comprises an output shaft fixedly connected coaxially with the motor rotor, one end of the screw rod is drivingly connected coaxially with the output shaft, and the other end of the screw rod is supported on the support housing.

[0013] In some embodiments, one end of the output shaft is provided with a mounting groove, and one end of the screw rod is fixedly arranged in the mounting groove.

[0014] In some embodiments, a threaded hole is formed in an end of the screw rod matched with the mounting groove, a connecting hole is formed in the output shaft and communicates with the mounting groove, the connecting hole is arranged opposite to the threaded hole, and a fastener is screwed through the connecting hole and the threaded hole.

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

[0016] In some embodiments, the oil cooling assembly comprises oil conveying pipeline and a cooler which are in communication with each other, the oil conveying pipeline is in communication with the oil-gas separation barrel, and the cooler is in communication with the oil inlet.

[0017] In some embodiments, the outer surface of the cooler is provided with a plurality of heat dissipation fins.

[0018] In some embodiments, the oil cooling assembly further comprises a heat dissipation fan arranged on one side of the cooler.

[0019] In some embodiments, the support housing is provided with an air inlet assembly at the inlet.

[0020] In some embodiments, one end of the air inlet assembly in communication with the inlet of the support housing is provided with a filter screen.

[0021] The utility model discloses the beneficial effect of:

[0022] This utility model provides a screw air compressor device, in which a motor rotor and a motor stator are coaxially arranged in a motor housing, and both the motor rotor and the motor stator are sealed with sealant. The screw compressor includes a support housing, which is fixedly located at the end of the motor housing away from the oil inlet and is connected to the motor housing. A screw, which is rotatably connected to the motor rotor, is mounted in the support housing. The oil-gas separator is connected to the oil cooling assembly and the outlet on the support housing, and the oil cooling assembly is connected to the oil inlet on the motor housing. By sealing the motor stator and rotor with sealant, the cooled oil flows directly through the motor stator and motor rotor for cooling. The cooled oil then enters the screw compressor for compression, thereby achieving efficient cooling of the motor and completely eliminating the need for the skeleton oil seal between the motor and the screw compressor, saving the maintenance costs of the skeleton seal and thus reducing manufacturing and maintenance costs. Furthermore, at low loads, the cooled oil can utilize the heat generated by the motor, preventing the oil-gas separator from becoming too cold and emulsifying. Furthermore, the oil in the oil-gas separator is cooled by the cooling components and then re-enters the motor to cool it, thus achieving the circulation of the motor cooling oil and continuously cooling the motor to ensure the stable operation of the screw air compressor unit. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Fig. 1 This is a schematic diagram of a screw air compressor device according to the present invention;

[0025] Fig. 2 This is a cross-sectional view of the screw compressor and motor assembly in a screw air compressor device according to this utility model.

[0026] In the picture:

[0027] 1. Motor; 11. Motor housing; 111. Oil inlet; 12. Motor rotor; 13. Motor stator; 14. Output shaft; 2. Screw compressor; 21. Support housing; 211. Outlet; 22. Screw; 221. Threaded hole; 3. Oil-gas separator; 4. Oil cooling assembly; 41. Oil pipeline; 42. Cooler; 43. Cooling fan; 5. Intake assembly; 6. Filter screen; 7. Exhaust pipeline. Detailed Implementation

[0028] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0029] In this application, the terms "comprising", "containing", "having" or any other similar words are intended to encompass non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. For example, direct connection refers to the connection of two parts or components without the need for an intermediate part, while indirect connection refers to the connection of two parts or components with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0031] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0032] In this application, the terms "up", "down", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the application. In addition, it should also be understood in the context that when referring to one element connected to another element "on" or "under", it can be directly connected to another element "on" or "under", or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "up", "down", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the lower side, the lower left side, the lower right side, the front lower side and the back lower side, etc.

[0033] In order to reduce the manufacturing cost and maintenance cost of the screw air compressor device, improve the cooling efficiency of the motor, and prevent the emulsification phenomenon caused by the overcooling of the oil-gas bucket, as shown in Figs. 1-2 The screw air compressor device comprises a motor 1, a screw machine 2, an oil-gas separation bucket 3 and an oil cooling assembly 4.

[0034] The motor 1 comprises a motor shell 11, a motor rotor 12 and a motor stator 13 are coaxially arranged in the motor shell 11, the motor rotor 12 and the motor stator 13 are both filled with sealing glue, and an oil inlet 111 is formed in the motor shell 11. Specifically, in the embodiment, the motor 1 is an internal rotor motor, and the motor rotor 12 is arranged in the motor stator 13. The screw machine 2 comprises a support shell 21, the support shell 21 is fixedly arranged at one end of the motor shell 11 away from the oil inlet 111, the support shell 21 is in communication with the motor shell 11, a screw 22 is rotatably arranged in the support shell 21, one end of the screw 22 is in transmission connection with the motor rotor 12, and an inlet and an outlet 211 are formed in the support shell 21. Specifically, the screw 22 is coaxially arranged with the motor rotor 12. The oil-gas separation barrel 3 is in communication with the outlet 211 of the support shell 21. One end of the oil cooling assembly 4 is in communication with the oil-gas separation barrel 3, and the other end of the oil cooling assembly 4 is in communication with the oil inlet 111 of the motor shell 11.

[0035] By filling the stator and the rotor of the motor 1 with sealing glue, the cooled oil directly flows through the motor stator 13 and the motor rotor 12 for cooling, and the cooled oil enters the screw machine 2 for a compression process, so that the motor 1 is efficiently cooled, the skeleton oil seal between the motor 1 and the screw machine 2 is completely removed, the maintenance cost of the skeleton seal is saved, and the manufacturing cost and the maintenance cost are reduced. When the load is low, the cooled oil can utilize the heat generated by the motor 1 to avoid the oil-gas separation barrel 3 from being too cold to be emulsified. Moreover, the oil in the oil-gas separation barrel 3 is cooled by the cooling assembly and then enters the motor 1 again to cool the motor 1, the circulation of the cooling oil of the motor 1 is realized, the motor 1 can be continuously cooled, and the screw air compressor device can stably operate.

[0036] In some embodiments, after the motor rotor 12 is packaged by the sealing glue, the surface smoothness needs to be ensured to reduce the friction loss with the cooled oil.

[0037] In some embodiments, the motor 1 further comprises an output shaft 14, the output shaft 14 is fixedly connected with the motor rotor 12 in a coaxial manner, one end of the screw 22 is in transmission connection with the output shaft 14 in a coaxial manner, and the other end of the screw 22 is supported on the support shell 21. By arranging the output shaft 14, the motor rotor 12 and the screw 22 are conveniently connected. In the embodiment, the output shaft 14 is fixedly arranged in the motor rotor 12, the output shaft 14 and the motor rotor 12 are stably connected, so that the output shaft 14 can be synchronously rotated with the motor rotor 12 during rotation of the motor rotor 12. In other embodiments, part of the screw 22 structure can be used as the output shaft 14, and the motor rotor 12 directly drives the screw 22 to rotate, which is not limited herein.

[0038] In some embodiments, one end of the output shaft 14 is provided with a mounting groove, and one end of the screw rod 22 is fixedly arranged in the mounting groove. In the present embodiment, the mounting groove is coaxial with the output shaft 14. By providing the mounting groove, the screw rod 22 can be guided and positioned during the abutment of the output shaft 14 and the screw rod 22, so as to ensure that the screw rod 22 is coaxial with the mounting groove after the abutment. The mounting groove can be a square groove or a rectangular groove, which can eliminate the rotation of the screw rod 22 relative to the output shaft 14 after the abutment of the screw rod 22 and the output shaft 14. In other embodiments, a shaft coupling can also be used to connect the output shaft 14 and the screw rod 22, which is not limited herein.

[0039] In some embodiments, a threaded hole 221 is formed at one end of the screw rod 22 which cooperates with the mounting groove, and a connecting hole is formed in the output shaft 14 and communicates with the mounting groove. The connecting hole is arranged opposite to the threaded hole 221, and a fastener is screwed through the connecting hole and the threaded hole 221. Specifically, the fastener is a bolt. By using the 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, the oil-gas separation bucket 3 is provided with an exhaust pipeline 7 for discharging the separated product gas. By providing the exhaust pipeline 7, the product gas can be guided and used in subsequent equipment.

[0041] In some embodiments, the oil cooling assembly 4 includes an oil conveying pipeline 41 and a cooler 42 which communicate with each other. The oil conveying pipeline 41 communicates with the oil-gas separation bucket 3, and the cooler 42 communicates with the oil inlet 111. Specifically, the oil conveying pipeline 41 communicates with the lower end of the oil-gas separation bucket 3. After the oil-gas separation is completed in the oil-gas separation bucket 3, the oil is located at the lower end of the oil-gas separation bucket 3 and is conveyed to the cooler 42 through the oil conveying pipeline 41 for heat dissipation and cooling. The oil which has completed heat dissipation and cooling enters the motor 1 through the oil inlet 111 of the motor housing 11 again to directly cool the motor rotor 12 and the motor stator 13. Through the above arrangement, the oil is recycled, and the motor 1 can be continuously cooled during the operation of the screw air compressor device, so as to ensure the efficient operation of the screw air compressor device.

[0042] In some embodiments, the outer surface of the cooler 42 is provided with a plurality of heat dissipation fins. By providing the heat dissipation fins, the heat exchange area of the cooler 42 with the external air can be increased, so that the heat exchange speed of the cooler 42 with the external air can be accelerated. As a result, the oil flowing out of the oil-gas separation bucket 3 can be quickly dissipated, and 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 comprises a heat dissipation fan 43 arranged at one side of the cooler 42. By arranging the heat dissipation fan 43, the air flow near the cooler 42 can be accelerated, so that the oil in the cooler 42 can be quickly heat exchanged with the air outside, so that the heat of the oil can be quickly dissipated.

[0044] In some embodiments, an air inlet assembly 5 is arranged at the inlet of the support shell 21. By arranging the air inlet assembly 5, the upstream air source can be easily connected, so that the upstream air can smoothly enter the screw machine 2 for compression.

[0045] In some embodiments, the air inlet assembly 5 is provided with a filter screen 6 at one end communicated with the inlet of the support shell 21. By arranging the filter screen 6, the air entering the screw machine 2 can be filtered, so that impurities are excluded from the screw machine 2, preventing the screw machine 2 from being abraded.

[0046] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limited to the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. Screw air compressor apparatus characterized by, The utility model relates to a kind of oil-cooled screw motor, including: Motor (1), including motor housing (11), motor rotor (12) and motor stator (13) are coaxially arranged in the motor housing (11), the motor rotor (12) is sealed with the motor stator (13) with potting sealant, oil inlet (111) is set on the motor housing (11); Screw machine (2), the support shell (21) is fixedly arranged in the motor housing (11) away from the oil inlet (111) one end, and the support shell (21) is communicated with the motor housing (11), screw rod (22) is rotatably arranged in the support shell (21), one end of the screw rod (22) is drivingly connected with the motor rotor (12), inlet and outlet (211) are set on the support shell (21); Oil-gas separation bucket (3), the oil-gas separation bucket (3) is communicated with the outlet (211); Oil cooling assembly (4), one end of the oil cooling assembly (4) is communicated with the oil-gas separation bucket (3), and the other end of the oil cooling assembly (4) is communicated with the oil inlet (111).

2. The screw air compressor unit of claim 1, wherein, The motor (1) further includes output shaft (14), the output shaft (14) is fixedly connected with the motor rotor (12) coaxially, one end of the screw rod (22) is drivingly connected with the output shaft (14) coaxially, and the other end of the screw rod (22) is supported on the support shell (21).

3. The screw air compressor unit of claim 2, wherein, One end of the output shaft (14) is provided with a mounting groove, and one end of the screw rod (22) is fixedly arranged in the mounting groove.

4. The screw air compressor unit of claim 3, wherein, The end of the screw rod (22) matched with the mounting groove is provided with a threaded hole (221), the output shaft (14) is provided with a connecting hole communicated with the mounting groove, the connecting hole is arranged opposite to the threaded hole (221), and a fastener is screwed through the connecting hole and the threaded hole (221).

5. The screw air compressor unit of claim 1, wherein, The oil-gas separation bucket (3) is provided with an exhaust pipeline (7) for discharging separated product gas.

6. The screw air compressor unit of claim 1, wherein, The oil cooling assembly (4) includes oil conveying pipeline (41) and cooler (42) communicated with each other, the oil conveying pipeline (41) is communicated with the oil-gas separation bucket (3), and the cooler (42) is communicated with the oil inlet (111).

7. The screw air compressor unit of claim 6, wherein, The outer surface of the cooler (42) is provided with a plurality of heat dissipation fins.

8. The screw air compressor unit of claim 6, wherein, The oil cooling assembly (4) further includes a cooling fan (43), and the cooling fan (43) is arranged on one side of the cooler (42).

9. The screw air compressor unit of claim 1, wherein, The inlet of the support shell (21) is provided with an air inlet assembly (5).

10. The screw air compressor unit of claim 9, wherein, One end of the air inlet assembly (5) communicated with the inlet of the support shell (21) is provided with a filter screen (6).

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