Water-lubricated screw compressor

Abstract

Embodiments of the present application provide a water-lubricated screw compressor, comprising: a compressor main machine comprising a casing, a compression chamber and a bearing chamber being provided in the casing, a screw being provided in the compression chamber, a rotating shaft of the screw extending from the compression chamber to the bearing chamber, and the rotating shaft being connected with the casing through a bearing provided in the bearing chamber; a dynamic sealing component being provided on the rotating shaft and located between the compression chamber and the bearing; the bearing chamber being provided with an inlet and a blow-off port; and a gas supply device being connected with the inlet of the bearing chamber, the gas supply device being adapted to input a gas with a predetermined pressure into the bearing chamber through the inlet to blow out the contaminants in the bearing chamber from the blow-off port.

Description

Technical Field

[0001] The exemplary embodiments of this application generally relate to the field of compressor technology, and particularly to a water-lubricated screw compressor. Background Technology

[0002] Water-lubricated screw compressors use cooling water as a lubricating medium to lubricate and cool the screw. They are typically used in applications requiring high gas quality, especially those demanding oil-free compressed gas. Although sealed components are usually installed inside the compressor, the high pressure in the compression chamber inevitably prevents complete water leakage into the bearing housing. To prevent contaminants leaking into the bearing housing and corroding the bearings, thus affecting bearing life and the normal operation of the water-lubricated screw compressor, these measures are necessary.

[0003] Therefore, how to effectively remove contaminants that have leaked into the bearing housing has become a problem worthy of attention. Utility Model Content

[0004] The purpose of this application is to provide a water-lubricated screw compressor to solve or at least partially solve the aforementioned problems and / or other potential problems existing in conventional water-lubricated screw compressors.

[0005] This application provides a water-lubricated screw compressor, comprising: a compressor main unit including a housing, a compression chamber and a bearing chamber within the housing, a screw disposed within the compression chamber, the screw shaft extending from the compression chamber to the bearing chamber, and the shaft being connected to the housing via a bearing disposed in the bearing chamber; a dynamic sealing component disposed on the shaft, the dynamic sealing component being located between the compression chamber and the bearing; the bearing chamber having an inlet and a drain outlet; and an air supply device connected to the inlet of the bearing chamber, the air supply device being adapted to input gas at a predetermined pressure into the bearing chamber through the inlet to blow out contaminants in the bearing chamber from the drain outlet.

[0006] In some embodiments, the gas supply device includes a pressure regulating component and a first gas-liquid separator, the outlet of the compression chamber is connected to the first gas-liquid separator, and the first gas-liquid separator is connected to the inlet through the pressure regulating component.

[0007] In some embodiments, the first gas-liquid separator includes a first exhaust port and a second exhaust port. The first gas-liquid separator is connected to a pressure regulating component through the first exhaust port, and the first gas-liquid separator is adapted to deliver compressed gas to the outside through the second exhaust port.

[0008] In some embodiments, the first exhaust port is connected to the pressure regulating component via a second gas-liquid separator or a first dryer.

[0009] In some embodiments, the first gas-liquid separator includes a second exhaust port, which is connected to a pressure regulating component via an exhaust pipe. The first gas-liquid separator is adapted to input gas into the bearing chamber via the exhaust pipe and to deliver compressed gas to the outside via the exhaust pipe.

[0010] In some embodiments, the second exhaust port is connected to the exhaust pipe via a third gas-liquid separator or a second dryer.

[0011] In some embodiments, the gas supply device includes a pressure regulating component and a blower, with the blower's outlet connected to the inlet via the pressure regulating component.

[0012] In some embodiments, the blower's air inlet is connected to an air filter.

[0013] In some embodiments, the pressure regulating component includes a pressure regulating valve, on which a pressure display unit is disposed, the pressure display unit being adapted to display the pressure of the gas entering the bearing chamber.

[0014] In some embodiments, the water-lubricated screw compressor is a single-screw compressor.

[0015] In this embodiment of the water-lubricated screw compressor, the gas supply device can introduce positive pressure gas at a predetermined pressure into the bearing chamber via a pressure regulating component. In this way, the positive pressure gas can blow out contaminants from the bearing chamber through the drain port. The overall structure is simple and occupies little space. Because positive pressure gas is introduced into the bearing chamber, excessive pressure difference across the dynamic seal component can be avoided to a certain extent during the draining process, preventing liquid leakage from the compression chamber into the bearing chamber induced by the draining operation, thereby ensuring the draining effect. Attached Figure Description

[0016] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0017] Figure 1 A piping schematic diagram of a water-lubricated screw compressor according to some embodiments of this application is shown;

[0018] Figure 2 The piping schematics of a water-lubricated screw compressor according to other embodiments of this application are shown; and

[0019] Figure 3 A piping schematic diagram of a water-lubricated screw compressor according to further embodiments of this application is shown.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10-Compressor main unit; 11-Casing; 12-Compression chamber; 13-Bearing chamber; 14-Inlet; 15-Drain port; 16-Screw; 17-Shaft; 18-Dynamic seal; 19-Bearing;

[0022] 21-First gas-liquid separator; 22-Second gas-liquid separator; 23-Third gas-liquid separator; 24-First exhaust port; 25-Second exhaust port;

[0023] 30 - Pressure regulating component; 31 - Pressure regulating valve; 32 - Pressure display unit; and

[0024] 41-Minimum pressure valve; 42-Exhaust pipe; 43-Blower; 44-Air filter; 45-Air filter. Detailed Implementation

[0025] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0026] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0027] This application provides a water-lubricated screw compressor, see [link]. Figure 1 As shown, the water-lubricated screw compressor of this application embodiment includes a compressor host 10 and an air supply device.

[0028] The compressor main unit 10 includes a housing 11, within which a compression chamber 12 and a bearing chamber 13 are provided. The bearing chamber 13 has an inlet 14 and a drain outlet 15. A screw 16 is provided within the compression chamber 12, and a shaft 17 of the screw 16 extends from the compression chamber 12 to the bearing chamber 13. The shaft 17 is connected to the housing 11 via a bearing 19 located in the bearing chamber 13. A dynamic seal 18 is provided on the shaft 17, and the dynamic seal 18 is located between the compression chamber 12 and the bearing 19.

[0029] The dynamic sealing component 18 can be implemented in several different ways. In some examples, the dynamic sealing component 18 can be a mechanical seal. As an example, combined with Figure 1As shown, the compression chamber 12 and the bearing chamber 13 can be arranged axially along the shaft 17. The bearing 19 can be positioned within the bearing chamber 13 at the end away from the compression chamber 12, and the mechanical seal can be positioned within the bearing chamber 13 at the end near the compression chamber 12. Of course, the dynamic seal 18 is not limited to a mechanical seal, nor is it limited to being positioned within the bearing chamber 13. The dynamic seal 18 can also be positioned in other spaces between the compression chamber 12 and the bearing chamber 13. This application embodiment does not limit this. In some examples, the inlet 14 of the bearing chamber 13 can be positioned between the bearing 19 and the dynamic seal 18. The drain port 15 can also be positioned between the bearing 19 and the dynamic seal 18.

[0030] To facilitate understanding of the improved embodiments of this application, some other structures related to the compressor main unit 10 will be described exemplarily below. However, it should not be construed as being limited to the use of the water-lubricated screw compressor shown below.

[0031] In some examples, the compression chamber 12 may have an air inlet and an air outlet. The air inlet of the compression chamber 12 may be connected to an air filter 44. The air is filtered by the air filter 44, and the filtered air is introduced into the compression chamber 12. This improves the cleanliness of the compressed gas.

[0032] In some examples, the water-lubricated screw compressor may also include a motor that can be drivenly connected to the screw 16. The motor drives the screw 16 to rotate, and during the rotation of the screw 16, it compresses the air introduced into the compression chamber 12 to form compressed gas. Finally, the compressed gas can be discharged through the outlet of the compression chamber 12.

[0033] In some examples, the water-lubricated screw compressor may also include a cooling water circulation system connected to the compression chamber 12. Cooling water can be sprayed into the compression chamber 12 through the cooling water circulation system to lubricate and seal the screw 16.

[0034] The gas supply device is connected to the inlet 14 of the bearing chamber 13. The gas supply device is adapted to input gas at a predetermined pressure into the bearing chamber 13 via the inlet 14 to blow out contaminants from the drain port 15. The specific implementation of the gas supply device will be explained in detail below with reference to examples, and will not be elaborated here. The predetermined pressure can be any suitable pressure greater than or equal to the bearing chamber 13 and less than or equal to the gas pressure at the outlet of the water-lubricated screw compressor, thereby enabling the introduction of positive pressure gas into the bearing chamber 13. For example, if the gas pressure inside the bearing chamber 13 is normally 1 Pa, the predetermined pressure can be 1.5 Pa, 2 Pa, etc. Of course, the gas pressure inside the bearing chamber 13 and the predetermined pressure described above are exemplary. The embodiments of this application do not limit this.

[0035] In this embodiment of the water-lubricated screw compressor, a predetermined pressure of positive gas is introduced into the bearing chamber 13 using a gas supply device. This allows contaminants in the bearing chamber 13 to be blown out through the drain port 15. Because positive pressure gas is introduced into the bearing chamber 13, excessive pressure difference across the dynamic seal component 18 can be avoided to a certain extent during the draining process, preventing liquid leakage from the compression chamber 12 into the bearing chamber 13 induced by the draining operation, thereby ensuring the effective draining.

[0036] In some embodiments, such as Figure 1 As shown, the gas supply equipment may include a pressure regulating component 30 and a first gas-liquid separator 21. The outlet of the compression chamber 12 is connected to the first gas-liquid separator 21, and the first gas-liquid separator 21 is connected to the inlet 14 via the pressure regulating component 30. The compression chamber 12 discharges the gas-liquid mixture into the first gas-liquid separator 21, where the mixture is separated into gas and liquid phases. A portion of the compressed gas is diverted from the first gas-liquid separator 21 and sent to the pressure regulating component 30. The pressure regulating component 30 adjusts the pressure of this portion of gas to a predetermined pressure for use in the bearing chamber 13 for purging. In this way, the compressed gas within the water screw compressor system itself is utilized, eliminating the need for an additional gas source. This simplifies the compressor's structure and reduces its production cost.

[0037] In some examples, the pressure regulating component 30 may include a pressure regulating valve 31, on which a pressure display unit 32 is deployed. The pressure display unit 32 is adapted to display the pressure of the gas entering the bearing chamber 13. This allows operators to conveniently monitor the pressure of the gas entering the bearing chamber 13 in real time. Examples of the pressure display unit 32 may include, but are not limited to, mechanical pressure gauges or digital pressure gauges. It is understood that the pressure regulating component 30 is not limited to the pressure regulating valve 31. The pressure regulating component 30 can be implemented using other valves with pressure regulating capabilities, or it can be implemented as a component consisting of multiple valves. The pressure regulating component 30 can also be implemented as part of the gas supply equipment. That is, if the gas supply equipment itself has pressure regulating capabilities, the pressure regulating component 30 can be a structure inside the gas supply equipment used for pressure regulation. The embodiments of this application do not limit the specific structure of the pressure regulating component 30.

[0038] In some embodiments, combined with Figure 1 As shown, the first gas-liquid separator 21 includes a first exhaust port 24 and a second exhaust port 25. The first gas-liquid separator 21 is connected to the pressure regulating component 30 through the first exhaust port 24, and the first gas-liquid separator 21 is adapted to deliver compressed gas to the outside through the second exhaust port 25. As an example, combined with... Figure 1As shown, the first gas-liquid separator 21 may include a gas-water separation tank (sometimes also referred to as a "water tank"), and the top of the gas-water separation tank may be provided with a first exhaust port 24 and a second exhaust port 25. The first exhaust port 24 may be connected to the pressure regulating component 30, and the second exhaust port 25 may be connected to the exhaust pipe 42 through, for example, a minimum pressure valve 41.

[0039] The gas-liquid mixture discharged from the compression chamber 12 undergoes gas-liquid separation in the gas-liquid separator. One gas path enters the pressure regulating component 30 (e.g., pressure regulating valve 31) through the first exhaust port 24. The pressure regulating component 30 adjusts the gas to a predetermined pressure before introducing it into the bearing chamber 13. The other gas path is supplied to the outside through the second exhaust port 25. It should be understood that the first gas-liquid separator 21 described above is merely exemplary. The first gas-liquid separator 21 can include various different gas-liquid separators, and examples of the first gas-liquid separator 21 may include, but are not limited to, gravity gas-liquid separators, centrifugal gas-liquid separators, filter gas-liquid separators, etc.

[0040] In some embodiments, the first exhaust port 24 is connected to the pressure regulating component 30 via the second gas-liquid separator 22. The second gas-liquid separator 22 can perform secondary gas-liquid separation on the gas discharged from the first gas-liquid separator 21, which helps to reduce the water content of the positive pressure gas being purged, avoids introducing water vapor into the bearing chamber 13, and helps to extend the service life of the bearing 19.

[0041] Alternatively or additionally, the first exhaust port 24 can also be connected to the pressure regulating component 30 via the first dryer. That is, the first dryer can also be used to dry the gas discharged from the first gas-liquid separator 21, thereby reducing the moisture content of the gas.

[0042] In some embodiments, such as Figure 2 As shown, the first gas-liquid separator 21 may include a second exhaust port 25, which is connected to the pressure regulating component 30 via an exhaust pipe 42. The first gas-liquid separator 21 is adapted to input gas into the bearing chamber 13 through the exhaust pipe 42 and to deliver compressed gas to the outside through the exhaust pipe 42. As an example, the first gas-liquid separator 21 may include a gas-water separation tank, the top of which may be provided with a second exhaust port 25, which may be connected to the exhaust pipe 42 via a minimum pressure valve 41. The air inlet of the pressure regulating component 30 may be connected to the exhaust pipe 42 via a diversion pipe. In this way, a portion of the gas can be diverted from the exhaust pipe 42, adjusted to a predetermined pressure by the pressure regulating component 30, and then introduced into the bearing chamber 13 for sludge removal. The purpose of sludge removal from the bearing chamber 13 can be achieved simply by adjusting the pipeline structure, which is beneficial for reducing the structural complexity of the water-lubricated screw compressor.

[0043] In some examples, such as Figure 2As shown, the second exhaust port 25 can be connected to the exhaust pipe 42 via the third gas-liquid separator 23. This reduces the moisture content of the prepared compressed gas, preventing water vapor from entering the bearing chamber 13 and extending the service life of the bearing 19, while also improving the quality of the supplied gas. Alternatively or additionally, the second exhaust port 25 can also be connected to the exhaust pipe 42 via a second dryer. For example, a second dryer can be deployed between the minimum pressure valve 41 and the connection point between the diversion pipe and the exhaust pipe 42.

[0044] In some embodiments, such as Figure 3 As shown, the air supply equipment may include a blower 43 and a pressure regulating component 30. The outlet of the blower 43 is connected to the inlet 14 via the pressure regulating component 30. The blower 43 can introduce gas from the external environment to supply gas solely to the bearing chamber 13. This helps reduce the impact on the compressed gas supply pipeline and helps maintain a stable compressed gas supply. In some examples, the inlet of the blower 43 can be connected to an air filter 45. The air filter 45 filters out some impurities (such as dust) from the air. The filtered gas is then delivered by the blower 43 to the pressure regulating component 30, where it is adjusted to a predetermined pressure before being introduced into the bearing chamber 13. This improves the cleanliness of the bearing chamber 13 and helps extend the service life of the bearing 19.

[0045] In some examples, the water-lubricated screw compressor may be a single-screw compressor. Of course, the water-lubricated screw compressor is not limited to a single-screw compressor and may be other types of water-lubricated screw compressors. The embodiments of this disclosure are not limited in this respect.

[0046] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A water-lubricated screw compressor, characterized by include: A compressor main unit includes a housing, within which a compression chamber and a bearing chamber are provided. A screw is provided in the compression chamber, and the shaft of the screw extends from the compression chamber to the bearing chamber, with the shaft connected to the housing via a bearing located in the bearing chamber. A dynamic sealing component is provided on the shaft, and the dynamic sealing component is located between the compression chamber and the bearing. The bearing chamber has an inlet and a drain outlet. as well as An air supply device is connected to the inlet of the bearing chamber, the air supply device being adapted to supply gas at a predetermined pressure to the bearing chamber via the inlet to blow out contaminants in the bearing chamber from the drain outlet.

2. The water-lubricated screw compressor according to claim 1, characterized in that, The gas supply equipment includes a pressure regulating component and a first gas-liquid separator. The outlet of the compression chamber is connected to the first gas-liquid separator, and the first gas-liquid separator is connected to the inlet through the pressure regulating component.

3. The water-lubricated screw compressor according to claim 2, characterized in that, The first gas-liquid separator includes a first exhaust port and a second exhaust port. The first gas-liquid separator is connected to the pressure regulating component through the first exhaust port. The first gas-liquid separator is adapted to deliver compressed gas to the outside through the second exhaust port.

4. The water-lubricated screw compressor according to claim 3, characterized in that, The first exhaust port is connected to the pressure regulating component via a second gas-liquid separator or a first dryer.

5. The water-lubricated screw compressor according to claim 2, characterized in that, The first gas-liquid separator includes a second exhaust port, which is connected to the pressure regulating component via an exhaust pipe. The first gas-liquid separator is adapted to input gas into the bearing chamber through the exhaust pipe and to deliver compressed gas to the outside through the exhaust pipe.

6. The water-lubricated screw compressor according to claim 5, characterized in that, The second exhaust port is connected to the exhaust pipe via a third gas-liquid separator or a second dryer.

7. The water-lubricated screw compressor according to claim 1, characterized in that, The gas supply equipment includes a pressure regulating component and a blower, and the outlet of the blower is connected to the inlet through the pressure regulating component.

8. The water-lubricated screw compressor according to claim 7, characterized in that, The air inlet of the blower is connected to an air filter.

9. The water-lubricated screw compressor according to claim 2 or 7, characterized in that, The pressure regulating component includes a pressure regulating valve, on which a pressure display unit is disposed, the pressure display unit being adapted to display the pressure of the gas input into the bearing chamber.

10. The water-lubricated screw compressor according to claim 1, characterized in that, The water-lubricated screw compressor is a single-screw compressor.

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