US-12618408-B2 - Compressor and additional oil injection system having same

US12618408B2US 12618408 B2US12618408 B2US 12618408B2US-12618408-B2

Abstract

A compressor and an additional oil injection system with the compressor are disclosed. The compressor ( 1 ) has a compression chamber ( 11 ) and an exhaust port ( 12 ), wherein, the compression chamber ( 11 ) is communicated with the exhaust port ( 12 ), the compression chamber ( 11 ) has an oil inlet of the compression chamber ( 18 ), and an oil injection port of exhaust port ( 13 ) is provided at the exhaust port ( 12 ).

Inventors

Chunlin Wang

Assignees

ATLAS COPCO (WUXI) COMPRESSOR CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20230407
Priority Date: 20220413

Claims (14)

1 . An additional oil injection system, wherein the additional oil injection system comprises: a compressor, wherein the compressor is a single-stage oil injected screw compressor, wherein the compressor has a compression chamber and an exhaust port, wherein the compressor comprises a compressor element and an exhaust end face provided on the compressor element, wherein, the compression chamber is formed in the compressor element, while the exhaust port is opened on the exhaust end face, the compression chamber is communicated with the exhaust port, the compression chamber has an oil inlet of the compression chamber, and an oil injection port of the exhaust port is provided at the exhaust port, an oil reservoir; a main oil circuit, wherein, one end of the main oil circuit is communicated with the oil reservoir, the other end of the main oil circuit is communicated with a first branched oil circuit and a second branched oil circuit, the first branched oil circuit is communicated with the oil inlet of the compression chamber, and the second branched oil circuit is communicated with the oil injection port of the exhaust port; and an oil pump at least used to provide the power for oil to flow from the oil reservoir to the second branched oil circuit, wherein the oil pump is provided on the second branched oil circuit to drive the oil in the second branched oil circuit to flow; wherein the additional oil injection system further comprises an oil relief circuit, wherein, one end of the oil relief circuit is directly connected with the main oil circuit, the other end of the oil relief circuit is directly connected with the oil reservoir, and the oil relief circuit is provided with an overflow valve, the overflow valve being configured as such that if the oil pressure of the oil relief circuit exceeds a preset pressure value, the overflow valve is opened, while when the oil pressure of the oil relief circuit does not exceed the preset pressure value, the overflow valve is closed.
2 . The additional oil injection system according to claim 1 , wherein the second branched oil circuit is provided with a flow volume regulating valve, and a valve opening degree of the flow volume regulating valve is adjustable.
3 . The additional oil injection system according to claim 2 , wherein further comprising a temperature detection element and a controller, wherein, the temperature detection element is used to detect the temperature of gas discharged from the exhaust port, both the temperature detection element and the flow volume regulating valve are electrically connected with the controller, and the controller is suitable for adjusting the valve opening degree of the flow volume regulating valve according to the temperature detected by the temperature detection element.
4 . The additional oil injection system according to claim 1 , wherein the main oil circuit is further provided with an oil cooler.
5 . The additional oil injection system according to claim 1 , wherein the oil reservoir is an oil-gas separation vessel, and the exhaust port is also connected with the oil reservoir through an exhaust pipe.
6 . The additional oil injection system according to claim 1 , wherein the oil reservoir is an oil-gas separation vessel, and an oil separation element of the oil-gas separation vessel is also connected with the compression chamber through an oil recirculation circuit.
7 . The additional oil injection system according to claim 1 , wherein the main oil circuit is further provided with an oil filter.
8 . The additional oil injection system according to claim 1 , wherein the oil inlet of the compression chamber is provided, a part of oil is injected to the compression chamber through the oil inlet of the compression chamber, and a part of oil is injected to the exhaust port through the oil injection port of the exhaust port.
9 . The additional oil injection system according to claim 1 , wherein the oil injection port of the exhaust port is configured as an oil injection nozzle, wherein, the oil injection nozzle is inserted into the exhaust port from one end of the compressor near the exhaust port and is provided with a plurality of oil injection holes.
10 . The additional oil injection system according to claim 9 , wherein a lengthwise direction of the oil injection nozzle is suitable to be perpendicular to or at a certain angle with an air outlet direction of the exhaust port.
11 . The additional oil injection system according to claim 10 , wherein the oil injection nozzle is configured as a rod structure.
12 . The additional oil injection system according to claim 1 , wherein the oil injection port of the exhaust port is configured as a plurality of oil injection holes formed on the exhaust end face.
13 . The additional oil injection system according to claim 12 , wherein an axis of the plurality of oil injection holes is perpendicular to an air outlet direction of the exhaust port.
14 . The additional oil injection system according to claim 1 , wherein the compressor is a single-stage low-pressure oil injected screw compressor or a single-stage high-pressure oil injected screw compressor.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims the priority of the patent application with the filing date of Apr. 13, 2022, application Ser. No. 202210389614.8, and the title of the patent application “compressor and additional oil injection system with the compressor”, and the priority of the patent application with the filing date of Apr. 13, 2022, application Ser. No. 202220863513.5, and the title of the patent application “compressor and additional oil injection system with the compressor”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD The present application relates to the technical field of compressors, in particular to a compressor and an additional oil injection system with the compressor. BACKGROUND The oil injected screw compressors are widely used in textile, glass, cement, fermentation and other fields. The oil injected screw compressors in the market have high energy consumption and low compression efficiency. The existing solutions improve the performance of the compressors by reducing the quantity of injected oil in the oil injected screw compressors, but they will bring some problems such as a high compressor outlet temperature, a sharply shortened life of lubricating oil and so on. The problems of high energy consumption and low compression efficiency will be caused if only the quantity of injected oil into the oil inlet of the compressor element is increased. SUMMARY OF THE PRESENT INVENTION The present application aims at solving at least one of the above-mentioned technical problems in the prior art to a certain extent. In view of this, the present application provides a compressor in which a part of oil can continue to provide cooling after the compression is completed. The present application also provides an additional oil injection system with the above-mentioned compressor. The compressor according to the embodiment of the present application has a compression chamber and an exhaust port, wherein, the compression chamber is communicated with the exhaust port, the compression chamber has an oil inlet of the compression chamber, and an oil injection port of the exhaust port is provided at the exhaust port. According to the embodiment of the present application, a part of oil in the mentioned compressor can be injected to the compression chamber through the oil inlet of the compression chamber so as to seal, lubricate and cool the compression chamber; and the other part of oil can be injected to the exhaust port through the oil injection port of the exhaust port to cool the gas at the exhaust port. According to some embodiments of the present application, the oil injection port of the exhaust port is configured as an oil injection nozzle, wherein, the oil injection nozzle is inserted into the exhaust port from one end of the compressor and the oil injection nozzle is provided with a plurality of oil injection holes. According to some embodiments of the present application, the compressor includes a compressor element and an exhaust end face provided on the compressor element, wherein, the compression chamber is formed in the compressor element, while the exhaust port is opened on the exhaust end face, and the oil injection port of the exhaust port is configured as a plurality of oil injection holes formed on the exhaust end face. According to some embodiments of the present application, the compressor is a single-stage oil injected screw compressor. According to some embodiments of the present application, the compressor is a single-stage low-pressure oil injected screw compressor or a single-stage high-pressure oil injected screw compressor. An additional oil injection system according to another embodiment of the present application comprises an oil reservoir, a main oil circuit, an oil pump and the above compressor. One end of the main oil circuit is communicated with the oil reservoir, while the other end of the main oil circuit is communicated with a first branched oil circuit and a second branched oil circuit. The first branched oil circuit is communicated with the oil inlet of the compression chamber, and the second branched oil circuit is communicated with the oil injection port of the exhaust port. The oil pump is at least used to provide the power for oil to flow from the oil reservoir to the second branched oil circuit. According to some embodiments of the present application, the oil pump is provided on the second branched oil circuit to drive the oil in the second branched oil circuit to flow. According to some embodiments of the present application, the oil pump is provided on the main oil circuit to drive the oil in the first branched oil circuit and the second branched oil circuit to flow. According to some embodiments of the present application, the additional oil injection system further comprises an oil relief circuit, wherein, one end of the oil relief circuit is connected with the main oil circuit, t