Two-stage screw air compressor with efficient heat dissipation function

Abstract

The utility model discloses a two-stage tandem type screw air compressor with efficient heat dissipation. The air compressor comprises a first-stage compression assembly, a second-stage compression assembly, a flow guide part and an oil way module. The first-stage compression assembly comprises a first-stage machine body and a first-stage compression assembly arranged in the first-stage machine body; a first air inlet is formed in the top of the first-stage machine body; the second-stage compression assembly is arranged at the rear end of the first-stage compression assembly and comprises a second-stage machine body and a second-stage compression assembly arranged in the second-stage machine body. A second air inlet is formed in the rear end of the bottom of the second-stage machine body; the flow guide piece is arranged at the bottoms of the primary machine body and the secondary machine body; the oil way module comprises an oil way inlet and a plurality of oil way channels used for communicating the interior of the first-stage compression assembly, the interior of the second-stage compression assembly and the interior of the flow guide part. The oil way inlet is at least partially formed in the bottom of the first-stage machine body. The oil way channel is connected with the oil way inlet. Through the arrangement, the heat dissipation performance of the air compressor is better, and the compression efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a two-stage screw air compressor with high-efficiency heat dissipation. Background Art

[0002] Two-stage screw air compressors are widely used for gas compression in industrial production. They significantly improve compression efficiency and reduce energy consumption through staged compression. Conventional two-stage screw air compressors operate by initially compressing the gas through a first-stage compression assembly, which then passes through an airflow channel to a second-stage compression assembly for further compression. However, the high temperatures generated during this process are a key issue affecting equipment performance and lifespan.

[0003] At present, two-stage screw air compressors generally cool the bearings of the male and female rotors in the first-stage compression assembly and the second-stage compression assembly to avoid bearing lubricant failure or shortened bearing life due to high temperature. However, this cooling method ignores the cooling of the gas flow path between the first-stage compression assembly and the second-stage compression assembly, which reduces the gas compression efficiency and may also increase the heat loss of the equipment, reducing the reliability and service life of the system. At the same time, the non-isothermal transfer of the gas to be compressed will also increase the burden on the second-stage compression assembly, further affecting the compression performance. In addition, the existing twin-screw air compressor adopts a radial parallel arrangement of the first-stage compression assembly and the second-stage compression assembly. When the gas flows in the air compressor, it turns many times, which also affects the cooling effect and compression efficiency. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a two-stage screw air compressor with high heat dissipation efficiency.

[0005] Based on the above purpose, the present invention adopts the following technical solutions:

[0006] A two-stage tandem screw air compressor with high-efficiency heat dissipation comprises: a first-stage compression assembly, a second-stage compression assembly, a flow guide and an oil circuit module, wherein the first-stage compression assembly comprises a first-stage body and a first-stage compression assembly arranged in the first-stage body; a first air inlet is provided at the top of the first-stage body, and a first air outlet is provided at the bottom rear end; the second-stage compression assembly is arranged at the rear end of the first-stage compression assembly, comprising a second-stage body and a second-stage compression assembly arranged in the second-stage body; a second air inlet is provided at the bottom rear end of the second-stage body, and a second air outlet is provided at the top; the flow guide is arranged at the bottom of the first-stage body and the second-stage body to form a gas flow channel connecting the first air outlet and the second air inlet; the oil circuit module comprises an oil circuit inlet and a plurality of oil circuit channels for connecting the interior of the first-stage compression assembly, the interior of the second-stage compression assembly and the interior of the flow guide; the oil circuit inlet is at least partially provided at the bottom of the first-stage body; and the oil circuit channels are connected to the oil circuit inlet.

[0007] Furthermore, the first-stage compression assembly includes a first-stage male rotor and a first-stage female rotor; the first-stage male rotor and the first-stage female rotor are both rotatably arranged in the first-stage body through bearings and are engaged with each other; the second-stage compression assembly includes a second-stage male rotor and a second-stage female rotor; the second-stage male rotor and the second-stage female rotor are both rotatably arranged in the second-stage body through bearings and are engaged with each other.

[0008] Furthermore, the oil circuit includes a first cooling channel, a second cooling channel and a third cooling channel; the first cooling channel is connected to the oil circuit inlet and is respectively connected to the bearings at the front and rear ends of the first-stage male rotor and the first-stage female rotor; the second cooling channel is connected to the oil circuit inlet and is respectively connected to the bearings at the front and rear ends of the second-stage male rotor and the second-stage female rotor; the third cooling channel is connected to the oil circuit inlet and is connected to the inside of the guide member, which can exchange heat for the air flow channel.

[0009] Furthermore, a nozzle is provided at one end of the third cooling channel connected to the interior of the flow guide member, and oil mist can be sprayed into the interior of the flow guide member through the nozzle.

[0010] Furthermore, the air compressor also includes a first-stage drive motor; the first-stage drive motor is installed on the front side of the first-stage compression assembly, connected to the first-stage male rotor, and is used to drive the first-stage male rotor to rotate.

[0011] Furthermore, the first-stage driving motor and the first-stage male rotor are integrally arranged to drive the first-stage male rotor to rotate coaxially.

[0012] Furthermore, the first-stage drive motor adopts variable frequency control to achieve stepless speed regulation.

[0013] Furthermore, the air compressor also includes a secondary drive motor; the secondary drive motor is installed on the front side of the secondary compression assembly and is connected to the secondary male rotor to drive the secondary male rotor to rotate.

[0014] Furthermore, the secondary drive motor and the secondary male rotor are integrally arranged to drive the secondary male rotor to rotate coaxially.

[0015] Furthermore, the secondary drive motor adopts variable frequency control to achieve stepless speed regulation.

[0016] The compressor's hierarchical design, featuring a primary and secondary compression assembly, allows for phased compression of gas within the compressor, reducing temperature rise and energy consumption during single-stage compression. Furthermore, the primary and secondary components are axially connected and connected via a flow guide, minimizing the number of gas turns within the compressor, reducing flow losses, and improving compression efficiency. Furthermore, the oil circuit module ensures adequate lubrication and cooling of all rotors and bearings. In particular, increased heat dissipation from the flow guide allows for a near-isothermal compression process, reducing power consumption and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a screw air compressor provided by the utility model;

[0018] Figure 2 This is a top sectional view of the screw air compressor provided by the utility model;

[0019] Figure 3 This is a left sectional view of the screw air compressor provided by the utility model;

[0020] Figure 4 It is a right view of the screw air compressor provided according to the utility model. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] At the same time, in order to clearly illustrate the technical solution of this application, the following are also defined: Figure 1 Upper, lower, front, back, left and right sides shown.

[0023] like Figures 1 to 4 As shown, the present application provides a two-stage screw air compressor with high heat dissipation efficiency, including: a first-stage compression assembly 11 , a second-stage compression assembly 12 , a flow guide 13 and an oil circuit module 14 .

[0024] Specifically, the first-stage compression assembly 11 includes a first-stage body 111 and a first-stage rotor assembly disposed within the first-stage body 111. The first-stage rotor assembly includes a first-stage male rotor 112 and a first-stage female rotor 113. A first air inlet 114 is provided at the top of the first-stage body 111, and a first air outlet 115 is provided at the bottom rear end. Both the first-stage male rotor 112 and the first-stage female rotor 113 are rotatably disposed within the first-stage body 111 via bearings and engage with each other.

[0025] The secondary compression assembly 12 is installed at the rear end of the primary compression assembly 11, and includes a secondary body 121 and a secondary rotor assembly arranged in the secondary body 121. Among them. The secondary rotor assembly includes a secondary male rotor 123 and a secondary female rotor. A second air inlet 124 is provided at the rear end of the bottom of the secondary body 121, and a second air outlet 125 is provided at the top. The secondary male rotor 123 and the secondary female rotor are both rotatably arranged in the secondary body 121 through bearings and are engaged with each other. The guide member 13 is installed at the bottom of the primary body 111 and the secondary body 121, forming a gas flow channel connecting the first air outlet 115 and the second air inlet 124.

[0026] The oil circuit module 14 includes an oil inlet 141 and several oil channels that connect the interiors of the first-stage compression assembly 11, the second-stage compression assembly 12, and the guide member 13. The oil channels are connected to the oil inlet 141. Specifically, the oil channels include a first cooling channel 142, a second cooling channel 143, and a third cooling channel 144. The oil inlet 141 is at least partially located at the bottom of the first-stage engine body 111. The first cooling channel 142 connects to the oil inlet 141 and connects to the front and rear bearings of the first-stage male rotor 112 and the first-stage female rotor 113. The second cooling channel 143 connects to the oil inlet 141 and connects to the front and rear bearings of the second-stage male rotor 123 and the second-stage female rotor. The third cooling channel 144 connects to the oil inlet 141 and connects to the interior of the guide member 13, enabling heat exchange between the airflow channels. The first cooling channel 142 is at least partially located within the first-stage engine body 111 and serves as the internal oil circuit of the first-stage engine body 111. The second cooling channel 143 and the third cooling channel 144 are external oil pipe passages of the first-stage body 111 and the second-stage body 121, so as to make the layout of the air compressor more compact.

[0027] In this embodiment, through the hierarchical design of the first-stage compression assembly 11 and the second-stage compression assembly 12, the gas is compressed in stages in the air compressor, reducing the temperature rise and energy consumption during single-stage compression. At the same time, the first-stage body 111 and the second-stage body 121 are axially connected and connected by the guide member 13, which reduces the number of turns the gas makes in the air compressor, reduces flow losses, and improves compression efficiency. In addition, the provision of the oil circuit module 14 ensures sufficient lubrication and cooling of each rotor and bearing position. In particular, the heat dissipation of the guide member 13 is increased, making the compression process approximately isothermal compression, reducing power consumption and improving efficiency.

[0028] like Figure 1 As shown, the oil circuit module 14 also includes an oil return line 145. Specifically, one end of the oil return line 145 is connected to the inner cavity of the guide member 13 and is located near the bottom of the guide member 13; the other end is connected to the inner cavity of the first-stage body 111. This prevents lubricating oil from accumulating at the bottom of the guide member 13, ensuring sufficient lubricating oil supply within the first-stage body 111, effectively reducing lubricating oil loss and improving economic efficiency.

[0029] The air compressor also includes a primary drive motor 15. This motor is mounted on the front side of the primary compression assembly 11 and is connected to the primary male rotor 112 to drive the primary male rotor 112. Furthermore, the primary drive motor 15 and the primary male rotor 112 are integrally configured to drive the primary male rotor 112 to rotate coaxially.

[0030] By directly connecting the primary drive motor 15 to the primary male rotor 112, transmission efficiency is improved and additional energy loss is reduced. Furthermore, the compact layout of the motor and compression components optimizes the space utilization of the air compressor, facilitating overall equipment integration and maintenance operations.

[0031] Similarly, the air compressor also includes a secondary drive motor 16. This motor is mounted on the front side of the secondary compression assembly 12 and is connected to the secondary male rotor 123 to drive the rotation of the secondary male rotor 123. The secondary drive motor 16 and the secondary male rotor 123 are integrally arranged to drive the coaxial rotation of the secondary male rotor 123.

[0032] A nozzle 1441 is provided at one end of the third cooling channel 144 connected to the interior of the guide member 13, through which oil mist can be sprayed into the guide member 13, thereby cooling the guide member 13 while reducing the resistance of the gas flow to a certain extent, further improving the overall efficiency of the air compressor.

[0033] Furthermore, the primary drive motor 15 utilizes variable frequency control, enabling stepless speed regulation. The secondary drive motor 16 also utilizes variable frequency control, enabling stepless speed regulation. This arrangement allows the air compressor to dynamically adjust its speed to suit varying pressures and operating conditions, achieving higher energy efficiency while reducing energy waste. This stepless speed regulation also ensures smoother startup and operation.

[0034] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professional and technical personnel in the field can implement or use the present invention. Various modifications to these embodiments will be obvious to professional and technical personnel in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A two-stage screw air compressor with high heat dissipation efficiency, characterized in that: include: A first-stage compression assembly (11), the first-stage compression assembly (11) comprising a first-stage body (111) and a first-stage rotor assembly disposed within the first-stage body (111); the first-stage body (111) is provided with a first air inlet (114) at the top and a first air outlet (115) at the rear end of the bottom; A secondary compression assembly (12), the secondary compression assembly (12) being arranged at the rear end of the primary compression assembly (11), comprising a secondary body (121) and a secondary rotor assembly arranged in the secondary body (121); a second air inlet (124) being provided at the rear end of the bottom of the secondary body (121), and a second air outlet (125) being provided at the top; a flow guide (13), the flow guide (13) being installed at the bottom of the first-stage body (111) and the second-stage body (121), forming a gas flow channel connecting the first gas outlet (115) and the second gas inlet (124); An oil circuit module (14), the oil circuit module (14) comprising an oil circuit inlet (141) and a plurality of oil circuit channels for communicating with the interior of the first-stage compression assembly (11), the interior of the second-stage compression assembly (12), and the interior of the flow guide (13); the oil circuit inlet (141) is at least partially disposed at the bottom of the first-stage body (111); and the oil circuit channels are connected to the oil circuit inlet (141).

2. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 1, characterized in that: The first-stage rotor assembly comprises a first-stage male rotor (112) and a first-stage female rotor (113); the first-stage male rotor (112) and the first-stage female rotor (113) are both rotatably disposed in the first-stage body (111) via bearings and mesh with each other; The secondary rotor assembly comprises a secondary male rotor (122) and a secondary female rotor (123); the secondary male rotor (122) and the secondary female rotor (123) are both rotatably arranged in the secondary body (121) via bearings and mesh with each other.

3. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 2, characterized in that: The oil passage comprises a first cooling passage (142), a second cooling passage (143), and a third cooling passage (144); the first cooling passage (142) is connected to the oil passage inlet (141) and is respectively connected to the bearings at the front and rear ends of the first-stage male rotor (112) and the first-stage female rotor (113); the second cooling passage (143) is connected to the oil passage inlet (141) and is respectively connected to the bearings at the front and rear ends of the second-stage male rotor (122) and the second-stage female rotor (123); the third cooling passage (144) is connected to the oil passage inlet (141) and is connected to the interior of the guide member (13), and is capable of exchanging heat for the air flow passage.

4. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 3, characterized in that: An end of the third cooling channel (144) communicating with the interior of the flow guide (13) is provided with a nozzle (1441), and oil mist can be sprayed into the interior of the flow guide (13) through the nozzle (1441).

5. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 2, characterized in that: The air compressor further includes a first-stage drive motor (15); the first-stage drive motor (15) is installed on the front side of the first-stage compression assembly (11), connected to the first-stage male rotor (112), and used to drive the first-stage male rotor (112) to rotate.

6. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 5, characterized in that: The first-stage driving motor (15) and the first-stage male rotor (112) are integrally arranged and can drive the first-stage male rotor (112) to rotate coaxially.

7. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 5, characterized in that: The first-stage drive motor (15) adopts frequency conversion control to achieve stepless speed regulation.

8. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 2, characterized in that: The air compressor further includes a secondary drive motor (16); the secondary drive motor (16) is installed on the front side of the secondary compression assembly (12), connected to the secondary male rotor (122), and used to drive the secondary male rotor (122) to rotate.

9. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 8, characterized in that: The secondary drive motor (16) and the secondary male rotor (122) are integrally arranged and can drive the secondary male rotor (122) to rotate coaxially.

10. A two-stage screw air compressor with high heat dissipation efficiency as claimed in claim 8, characterized in that: The secondary drive motor (16) adopts variable frequency control to achieve stepless speed regulation.

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