A multi-connected unit based on a magnetic suspension centrifugal compressor

Abstract

The utility model relates to centrifugal compressor technical field, concretely is a kind of multi-connected unit based on magnetic suspension centrifugal compressor, it include: low pressure system, high pressure system, pipe connection system, control system;Low pressure system includes: low pressure dust filter, low pressure compressor, low pressure gas pocket, low pressure filter, low pressure buffer tank that are sequentially communicated with;High pressure system includes: high pressure dust filter, high pressure compressor, high pressure gas pocket, high pressure filter, high pressure buffer tank that are sequentially communicated with;Pipe connection system includes: the high pressure intake three-way valve of intercommunication, low pressure outlet gas three-way valve and high pressure outlet gas three-way valve.The utility model relates to a kind of multi-connected unit based on magnetic suspension centrifugal compressor, by the most suitable air supply mode, ensure the stability of gas supply pressure, gas supply flow, and adapt to actual production condition.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal compressor technology, specifically a multi-unit based on a magnetic levitation centrifugal compressor. Background Technology A compressor is a mechanical device that uses kinetic energy to increase the pressure of a low-pressure gas to a high-pressure gas. Compressors are classified according to their working principle into: positive displacement compressors, which compress gas by reducing the volume of a sealed space; common types include reciprocating-piston, rotary-screw, scroll, and vane compressors; and dynamic compressors, which transfer kinetic energy to the gas through a high-speed rotating impeller; common types include centrifugal and axial flow compressors. Compressors are widely used in industrial manufacturing, chemical and oil refining, refrigeration and air conditioning, energy and transportation, medical and food industries, and daily life.

[0002] Centrifugal compressors utilize a high-speed rotating impeller to transfer kinetic energy to the gas, which is then converted into pressure energy in a diffuser.

[0003] Currently, in order to reduce pressure fluctuations in the gas supply system and increase the gas supply flow, a small-capacity, high-pressure centrifugal compressor is connected to the exhaust port of a large-capacity, low-pressure centrifugal compressor, and the process environment can be achieved by connecting it to the corresponding process pipelines to meet the requirements of various pressure levels.

[0004] However, in conventional centrifugal compressor units that connect a large-capacity, low-pressure centrifugal compressor with a small-capacity, high-pressure centrifugal compressor, the low-pressure output gas is produced by the low-pressure compressor, the intake gas of the high-pressure compressor is compressed once by the low-pressure compressor, and the high-pressure output gas is produced by the high-pressure compressor. Therefore, conventional centrifugal compressor units still have the following shortcomings: 1. When the high-pressure gas supply is replenishing gas, the low-pressure gas supply is intermittently replenishing gas. 2. The low-pressure compressor and the high-pressure compressor are connected in series, with a constant output of gas, which cannot meet the needs of different production processes. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model provides a multi-unit based on a magnetic levitation centrifugal compressor, which ensures the stability of gas supply pressure and gas flow through the most suitable gas replenishment method, and is adapted to actual production conditions.

[0006] The technical solution adopted by this utility model is: A multi-unit based on a magnetic levitation centrifugal compressor includes: a low-pressure system, a high-pressure system, and a control system.

[0007] The low-pressure system includes: a low-pressure dust filter, a low-pressure compressor, a low-pressure air manifold, a low-pressure filter, and a low-pressure buffer tank, which are connected in sequence.

[0008] The high-pressure system includes: a high-pressure dust filter, a high-pressure compressor, a high-pressure air tank, a high-pressure filter, and a high-pressure buffer tank, which are connected in sequence.

[0009] A piping system is provided to connect the low-pressure system and the high-pressure system, including: a high-pressure inlet three-way valve, a low-pressure outlet three-way valve, and a high-pressure outlet three-way valve connected together; the high-pressure inlet three-way valve is connected to the high-pressure dust filter and the high-pressure compressor, the low-pressure outlet three-way valve is connected to the low-pressure air tank and the low-pressure filter, and the high-pressure outlet three-way valve is connected to the low-pressure buffer tank, the high-pressure air tank, and the high-pressure filter.

[0010] Furthermore, a low-pressure sensor electrically connected to the control system is installed on the low-pressure buffer tank.

[0011] The high-pressure buffer tank is equipped with a high-pressure sensor that is electrically connected to the control system.

[0012] Furthermore, the high-pressure inlet three-way valve, the low-pressure outlet three-way valve, and the high-pressure outlet three-way valve are configured as self-controlled three-way valves that are electrically connected to the control system respectively.

[0013] Furthermore, the low-pressure system, high-pressure system, and pipeline connection system constitute a gas supply subsystem. The gas supply subsystem is provided in multiple groups and forms a total gas supply system, including: a low-pressure pipeline network that is connected to each low-pressure buffer tank in the multiple gas supply subsystems, and a high-pressure pipeline network that is connected to each high-pressure buffer tank in the multiple gas supply subsystems.

[0014] Furthermore, the outlets of the low-pressure dust filter and the high-pressure dust filter are respectively connected to the low-pressure buffer tank, and shut-off valves are respectively connected to the connecting pipelines.

[0015] Furthermore, the shut-off valve is configured as a self-controlled two-way valve that is electrically connected to the control system.

[0016] Furthermore, check valves are installed on the connecting pipelines of the low-pressure buffer tank and the high-pressure buffer tank to the low-pressure pipeline network and the high-pressure pipeline network, respectively.

[0017] The beneficial effects of this utility model of a multi-unit chiller based on a magnetic levitation centrifugal compressor are as follows: 1. Through an independent low-pressure system, the pressure and flow rate of low-pressure gas are kept stable and supplied to the low-pressure gas-consuming environment of the production process. 2. Through an independent high-pressure system, the pressure and flow rate of high-pressure gas are kept stable and supplied to the high-pressure gas-consuming environment of the production process. 3. When there is sufficient high-pressure gas, replenish gas from the high-pressure side to the low-pressure side to improve the efficiency of low-pressure gas replenishment. 4. Use low-pressure gas as the intake for high-pressure gas to improve the efficiency of high-pressure gas replenishment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a sub-process of an embodiment of this utility model; Figure 2 This is a schematic diagram of the overall process of this utility model.

[0019] In the picture: 11. Low-pressure dust filter; 12. Low-pressure compressor; 13. Low-pressure air tank; 14. Low-pressure filter; 15. Low-pressure buffer tank. 21. High-pressure dust filter; 22. High-pressure compressor; 23. High-pressure air tank; 24. High-pressure filter; 25. High-pressure buffer tank. 31. High-pressure inlet three-way valve; 32. Low-pressure outlet three-way valve; 33. High-pressure outlet three-way valve. 41. Low-pressure pipeline network; 42. High-pressure pipeline network. Detailed Implementation

[0020] To more clearly and explicitly illustrate the specific implementation objectives and methods of this utility model, the technical solution of this utility model will be fully described below. The described embodiments are only some embodiments of this utility model, not all embodiments. Without creative effort, all other embodiments based on the described embodiments of this utility model are within the protection scope of this utility model.

[0021] This utility model relates to a multi-unit chiller based on a magnetic levitation centrifugal compressor, such as... Figure 1 As shown, it includes: The gas supply subsystem consists of a low-pressure system, a high-pressure system, and a pipeline connection system.

[0022] Low-voltage systems, including: A low-pressure dust filter 11 is connected to a low-pressure compressor 12 at its outlet end. A low-pressure air manifold 13 is connected to the outlet end of the low-pressure compressor 12. A low-pressure filter 14 is connected to the outlet end of the low-pressure air manifold 13. A low-pressure buffer tank 15 is connected to the outlet end of the low-pressure filter 14. A low-pressure sensor and a low-pressure relief valve are connected to the low-pressure buffer tank 15.

[0023] High-voltage systems include: A high-pressure dust filter 21 is connected to a high-pressure compressor 22 at its outlet end. A high-pressure air tank 23 is connected to the outlet end of the high-pressure compressor 22. A high-pressure filter 24 is connected to the outlet end of the high-pressure air tank 23. A high-pressure buffer tank 25 is connected to the outlet end of the high-pressure filter 24. A high-pressure sensor and a high-pressure relief valve are connected to the high-pressure buffer tank 25.

[0024] Pipeline connection systems are used to connect low-voltage and high-voltage systems, including: A high-pressure inlet three-way valve 31 is installed on the connecting pipeline between the high-pressure dust filter 21 and the high-pressure compressor 22; a low-pressure outlet three-way valve 32 is installed on the connecting pipeline between the low-pressure air tank 13 and the low-pressure filter 14; and a high-pressure outlet three-way valve 33 is installed on the connecting pipeline between the high-pressure air tank 23 and the high-pressure filter 24. The high-pressure inlet three-way valve 31 is connected to the low-pressure outlet three-way valve 32, and the high-pressure outlet three-way valve 33 is connected to the low-pressure buffer tank 15.

[0025] The low-pressure sensor and the high-pressure sensor are electrically connected to the control system. The high-pressure inlet three-way valve 31, the low-pressure outlet three-way valve 32, and the high-pressure outlet three-way valve 33 are respectively set as self-controlled valves and are electrically connected to the control system.

[0026] Multiple gas supply subsystems make up the main gas supply system, such as Figure 2 As shown, it includes: A low-pressure pipeline network 41 is connected to each low-pressure buffer tank 15 in multiple gas supply subsystems, and a low-pressure check valve is installed on the connecting pipeline from the low-pressure buffer tank 15 to the low-pressure pipeline network 41; a high-pressure pipeline network 42 is connected to each high-pressure buffer tank 25 in multiple gas supply subsystems, and a high-pressure check valve is installed on the connecting pipeline from the high-pressure buffer tank 25 to the high-pressure pipeline network 42.

[0027] Based on the specific structure of a multi-unit air conditioning system based on a magnetic levitation centrifugal compressor in the above embodiments, its gas supply process will be further explained below: A. In the gas supply subsystem, the low-pressure system and the high-pressure system are supplied with gas independently: The pressure in the low-pressure buffer tank 15 is within the low-pressure operating range, while the pressure in the high-pressure buffer tank 25 is within the high-pressure operating range.

[0028] The high-pressure inlet three-way valve 31 connects the high-pressure dust filter 21 and the high-pressure compressor 22, while the low-pressure outlet three-way valve 32 connects the low-pressure air tank 13 and the low-pressure filter 14. At this time, the connection between the low-pressure air tank 13 and the high-pressure compressor 22 is interrupted.

[0029] The high-pressure outlet three-way valve 33 connects the high-pressure air tank 23 and the high-pressure filter 24. At this time, the low-pressure buffer tank 15 and the high-pressure air tank 23 are in an interrupted state. The low-pressure compressor 12 operates and supplies gas to the low-pressure buffer tank 15, keeping the low-pressure buffer tank 15 within the low-pressure operating pressure range; the high-pressure compressor 22 operates and supplies gas to the high-pressure buffer tank 25, keeping the high-pressure buffer tank 25 within the high-pressure operating pressure range.

[0030] B. In the gas supply subsystem, the low-pressure system supplies gas to the high-pressure system: The pressure in the low-pressure buffer tank 15 is within the low-pressure operating range, while the pressure in the high-pressure buffer tank 25 is below the high-pressure operating range.

[0031] The high-pressure inlet three-way valve 31 and the low-pressure outlet three-way valve 32 connect the low-pressure air tank 13 and the high-pressure compressor 22. At this time, the low-pressure air tank 13 and the low-pressure filter 14 are in an interrupted state. The high-pressure outlet three-way valve 33 connects the high-pressure air tank 23 and the high-pressure filter 24. At this time, the low-pressure buffer tank 15 and the high-pressure air tank 23 are in an interrupted state.

[0032] The low-pressure compressor 12 operates and supplies gas to the high-pressure compressor 22, causing the high-pressure buffer tank 25 to pressurize rapidly until the high-pressure buffer tank 25 reaches the high-pressure operating pressure range.

[0033] C. In the gas supply subsystem, the high-pressure system supplies gas to the low-pressure system: The pressure in the low-pressure buffer tank 15 is below the low-pressure operating pressure range, while the pressure in the high-pressure buffer tank 25 is within the high-pressure operating pressure range.

[0034] The high-pressure inlet three-way valve 31 and the low-pressure outlet three-way valve 32 connect the low-pressure air tank 13 and the high-pressure compressor 22. At this time, the low-pressure air tank 13 and the low-pressure filter 14 are in an interrupted state. The high-pressure outlet three-way valve 33 connects the low-pressure buffer tank 15 and the high-pressure air tank 23. At this time, the high-pressure air tank 23 and the high-pressure filter 24 are in an interrupted state.

[0035] The low-pressure compressor 12 operates and supplies gas to the high-pressure compressor 22. The high-pressure compressor 22 operates and replenishes gas to the low-pressure buffer tank 15, causing the low-pressure buffer tank 15 to pressurize rapidly until the low-pressure buffer tank 15 reaches the low-pressure operating pressure range.

[0036] D. Dust removal and cleaning: The outlets of the low-pressure dust filter 21 and the high-pressure dust filter 21 are respectively connected to the low-pressure buffer tank 15, and a shut-off valve is connected to each of the connecting pipelines. After the shut-off valve is opened, the low-pressure gas in the low-pressure buffer tank 15 cleans the low-pressure dust filter 11 and the high-pressure dust filter 21 respectively. At this time, the low-pressure compressor 12 and the high-pressure compressor 22 are in a stopped state.

[0037] In summary, the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification. All equivalent variations and modifications of the shape, structure, features, and spirit described in the claims of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A multi-unit chiller based on a magnetic levitation centrifugal compressor, characterized in that: include: Low-voltage system, high-voltage system, control system; The low-voltage system includes: The low-pressure dust filter (11), low-pressure compressor (12), low-pressure air manifold (13), low-pressure filter (14), and low-pressure buffer tank (15) are connected in sequence. The high-voltage system includes: The high-pressure dust filter (21), high-pressure compressor (22), high-pressure air tank (23), high-pressure filter (24), and high-pressure buffer tank (25) are connected in sequence. A piping system connects the low-pressure system and the high-pressure system, including: The high-pressure inlet three-way valve (31), the low-pressure outlet three-way valve (32), and the high-pressure outlet three-way valve (33) are connected together; the high-pressure inlet three-way valve (31) is connected to the high-pressure dust filter (21) and the high-pressure compressor (22); the low-pressure outlet three-way valve (32) is connected to the low-pressure air tank (13) and the low-pressure filter (14); and the high-pressure outlet three-way valve (33) is connected to the low-pressure buffer tank (15), the high-pressure air tank (23), and the high-pressure filter (24).

2. A multi-unit chiller based on a magnetic levitation centrifugal compressor according to claim 1, characterized in that: A low-pressure sensor electrically connected to the control system is installed on the low-pressure buffer tank (15); A high-voltage sensor electrically connected to the control system is installed on the high-pressure buffer tank (25).

3. A multi-unit chiller based on a magnetic levitation centrifugal compressor according to claim 2, characterized in that: The high-pressure inlet three-way valve (31), the low-pressure outlet three-way valve (32), and the high-pressure outlet three-way valve (33) are configured as self-controlled three-way valves that are electrically connected to the control system respectively.

4. A multi-unit chiller based on a magnetic levitation centrifugal compressor according to claim 1, characterized in that: The low-pressure system, high-pressure system, and pipeline connection system constitute a gas supply subsystem. Multiple gas supply subsystems are provided, forming a total gas supply system, including: Low-pressure pipelines (41) are connected to each low-pressure buffer tank (15) in multiple gas supply subsystems, and high-pressure pipelines (42) are connected to each high-pressure buffer tank (25) in multiple gas supply subsystems.

5. A multi-unit chiller based on a magnetic levitation centrifugal compressor according to claim 4, characterized in that: The outlets of the low-pressure dust filter (11) and the high-pressure dust filter (21) are respectively connected to the low-pressure buffer tank (15), and a shut-off valve is respectively connected to the connecting pipeline.

6. A multi-unit chiller based on a magnetic levitation centrifugal compressor according to claim 5, characterized in that: The shut-off valve is configured as a self-controlled two-way valve that is electrically connected to the control system.

7. A multi-unit chiller based on a magnetic levitation centrifugal compressor according to claim 6, characterized in that: Check valves are installed on the connecting pipelines of the low-pressure buffer tank (15) and the high-pressure buffer tank (25) to the low-pressure pipeline network (41) and the high-pressure pipeline network (42), respectively.

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