A positive pressure auxiliary system for a dynamic pressure gas suspension centrifugal air compressor

Abstract

The utility model provides a positive pressure auxiliary system for dynamic pressure gas suspension centrifugal air compressor, including motor casing, including exhaust pipe, primary volute, gas supply pipe, primary volute exhaust pipe and secondary volute air inlet pipe, both ends of exhaust pipe are connected motor casing's air outlet and secondary volute air inlet pipe respectively, both ends of gas supply pipe are connected motor casing's air inlet and primary volute exhaust pipe respectively, can realize for the motor casing inside to provide stable positive pressure environment with the application of this technical scheme.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a positive pressure auxiliary system for a dynamic pressure air suspension centrifugal air compressor. Background Technology

[0002] In recent years, dynamic pressure air suspension technology has achieved frictionless operation through gas bearings, significantly improving the energy efficiency and reliability of centrifugal air compressors. However, current dynamic pressure air suspension compressors face the following technical bottlenecks.

[0003] First, air bearings are sensitive to impurities. Tiny particles or dust leaking in from the seals can cause air film oscillations, or even rotor friction or instability.

[0004] Secondly, although there are seals between the rotor and the stator, there will inevitably be some leakage of compressed gas, which will increase as the pressure difference before and after sealing increases.

[0005] The above problems will shorten the service life of the air bearing and affect the performance of the centrifugal air compressor. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a positive pressure auxiliary system for a dynamic pressure air suspension centrifugal air compressor, so as to provide a stable positive pressure environment inside the motor housing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a positive pressure auxiliary system for a dynamic pressure air suspension centrifugal air compressor, comprising a motor housing, an exhaust pipe, a primary volute, an air supply pipe, a primary volute exhaust pipe, and a secondary volute inlet pipe; the two ends of the exhaust pipe are respectively connected to the air outlet of the motor housing and the secondary volute inlet pipe; the two ends of the air supply pipe are respectively connected to the air inlet of the motor housing and the primary volute exhaust pipe.

[0008] In a preferred embodiment, the system further includes an intercooler, the two ends of which are respectively connected to a primary volute exhaust pipe and a secondary volute intake pipe.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. A "breathing barrier" is formed through a positive pressure system, thereby preventing pollutants from entering and ensuring the stable operation of the air compressor.

[0011] 2. Utilize the high-pressure gas at the compressor outlet to achieve gas seal self-pressurization, reduce gas leakage, and improve compressor energy efficiency.

[0012] 3. Ensure that the air bearing can operate in its suitable working environment, thereby improving the service life and start-stop frequency of the air bearing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structural connection of the positive pressure auxiliary system according to a preferred embodiment of the present invention;

[0014] Figure 2 This is a schematic cross-sectional view of the structural connection of the positive pressure auxiliary system according to a preferred embodiment of the present invention;

[0015] Wherein: 1-exhaust pipe, 2-air outlet of motor housing, 3-first stage volute, 4-air inlet of motor housing, 5-air supply pipe, 6-exhaust pipe of first stage volute, 7-intercooler, 8-air inlet pipe of second stage volute, 9-second stage volute, 10-motor housing. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] Please see the appendix Figure 1-2 The main technical solution adopted in this invention includes: setting a corresponding air supply channel on the motor housing 10, one end of which is the air inlet 4 of the motor housing, and the other end is the air outlet 2 of the motor housing. The air inlet 4 of the motor housing is connected to the first-stage volute exhaust pipe 6 through the air supply pipe 5, and the air outlet 2 of the motor housing is connected to the second-stage volute air inlet pipe 8 through the exhaust pipe 1, thereby realizing a stable positive pressure environment inside the motor housing.

[0020] One end of the exhaust pipe 1 is connected to the secondary volute intake pipe 8 of the primary volute 3, and the other end of the exhaust pipe 1 is connected to the exhaust port 2 of the motor housing, providing high-pressure gas to the inside of the motor housing 10.

[0021] An intercooler 7 is arranged between the primary volute exhaust pipe 6 and the secondary volute intake pipe 8. This intercooler 7 can reduce the intake temperature of the secondary volute 9 and lower the pressure of the gas, thereby creating a pressure difference between the inlet and outlet of the intercooler 7.

[0022] One end of the air supply pipe 5 is connected to the first-stage volute exhaust pipe 6, and the other end is connected to the air inlet 4 of the motor housing, so as to create a flowing and stable positive pressure environment inside the motor housing 10.

[0023] This invention uses the compressor's own air source to achieve self-pressurization inside the casing, thus creating a positive pressure environment inside the casing.

[0024] This invention forms an "air curtain barrier" through a positive pressure system, thereby preventing pollutants from entering and ensuring the stable operation of the air compressor.

[0025] This invention utilizes the high-pressure gas at the compressor outlet to achieve self-pressurization of the gas seal, thereby reducing gas leakage and improving compressor energy efficiency.

[0026] This invention ensures that the air bearing can operate in its suitable working environment, thereby improving the service life and the number of start-stop cycles of the air bearing.

Claims

1. A positive pressure auxiliary system for a dynamic pressure air-suspended centrifugal air compressor, comprising a motor housing, characterized in that, It includes an exhaust pipe, a first-stage volute, an air supply pipe, a first-stage volute exhaust pipe, and a second-stage volute intake pipe; the two ends of the exhaust pipe are respectively connected to the air outlet of the motor housing and the second-stage volute intake pipe; the two ends of the air supply pipe are respectively connected to the air inlet of the motor housing and the first-stage volute exhaust pipe.

2. The positive pressure auxiliary system for a dynamic pressure air suspension centrifugal air compressor according to claim 1, characterized in that, It also includes an intercooler, the two ends of which are respectively connected to the primary volute exhaust pipe and the secondary volute intake pipe.

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