Graded differential type hydraulic drive circulating liquid seal compressor

Abstract

The utility model relates to a differential type hydraulic drive circulating liquid seal compressor, which comprises a compression unit, a hydraulic station, a circulating liquid pump, a plurality of first pipelines and a plurality of second pipelines, and the compression unit comprises a first cylinder body, an oil cylinder body and a second cylinder body which are axially connected from left to right in sequence through connectors. A first cavity and a second cavity are formed in the left side and the right side of the first piston respectively, a third cavity and a fourth cavity are formed in the left side and the right side of the second piston respectively, and an air inlet and an air outlet are formed in the positions, corresponding to the first cavity and the second cavity, of the first cylinder body and the positions, corresponding to the third cavity and the fourth cavity, of the second cylinder body respectively. Wherein a first air inlet valve is arranged at the air inlet of each of the first chamber and the fourth chamber, a first air outlet valve is arranged at the air outlet of each of the first chamber and the fourth chamber, and the volume of the first chamber after air intake is finished is larger than that of the fourth chamber after air intake is finished. The stage difference type hydraulic drive circulating liquid seal compressor not only can stably and efficiently compress gas, but also can compress gas with different pressures.

Description

Technical Field

[0001] This utility model relates to the field of compressors, and in particular to a differential liquid-driven circulating liquid-sealed compressor. Background Technology

[0002] Currently, circulating liquid seal compressors utilize a crankshaft structure to drive a piston within a cylinder in reciprocating motion to pressurize gas. An annular cavity is created between the piston and cylinder to store circulating liquid, thereby achieving a sealed gas chamber, as illustrated in patent CN114439728A. While existing compressors employing crankshaft structures and circulating liquid seals can achieve pressurization within a certain range, the crankshaft structure is prone to wobbling during operation, resulting in poor stability. This leads to problems such as piston deformation, piston wear, and decreased sealing between the piston and cylinder, reducing their service life. Furthermore, existing compressors also suffer from low compression efficiency. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a differential liquid-driven circulating liquid seal compressor, which can not only compress gas stably and efficiently, but also compress gas at different pressures.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] A staged hydraulically driven circulating liquid-sealed compressor includes a compression unit, a hydraulic station, a circulating liquid pump, several first pipelines, and several second pipelines. The compression unit includes a first cylinder, a hydraulic cylinder, and a second cylinder, axially connected from left to right via a connecting body. A first piston, a hydraulic piston, and a second piston are respectively disposed within the first cylinder, the hydraulic cylinder, and the second cylinder. A first piston rod connects the hydraulic piston to the first piston, and a second piston rod connects the hydraulic piston to the second piston. A first hydraulic chamber is formed on the left side of the hydraulic piston, and a second hydraulic chamber is formed on the right side. The hydraulic cylinders corresponding to the first and second hydraulic chambers are respectively... A hydraulic port is provided, which is connected to a hydraulic station through a first pipeline to alternately supply hydraulic oil to the first hydraulic chamber and the second hydraulic chamber to drive the first piston and the second piston to reciprocate. A first circulating fluid chamber is formed between the first piston and the first cylinder body, and between the second piston and the second cylinder body. The first cylinder body and the second cylinder body are respectively provided with a first circulating fluid inlet and a first circulating fluid outlet communicating with the corresponding first circulating fluid chamber. The first circulating fluid inlet and the first circulating fluid outlet are respectively connected to a circulating fluid pump through a second pipeline to continuously supply circulating fluid into the first circulating fluid chamber to achieve liquid sealing.

[0006] The first piston can form a first chamber on its left side and a second chamber on its right side. The second piston can form a third chamber on its left side and a fourth chamber on its right side. The first cylinder corresponding to the first and second chambers, and the second cylinder corresponding to the third and fourth chambers, are respectively provided with an air inlet and an air outlet. The air inlets of the first and fourth chambers are provided with a first air inlet valve, and the air outlets are provided with a first air outlet valve. The volume of the first chamber at the end of air intake is greater than the volume of the fourth chamber at the end of air intake, so as to output differential pressure gas.

[0007] In one example, the second chamber and the third chamber are provided with a second air inlet valve at their air inlets and a second air outlet valve at their air outlets, and the volume of the second chamber at the end of its air intake is greater than the volume of the third chamber at the end of its air intake, so that the two can output differential pressure.

[0008] In one example, the volume of the fourth chamber at the end of its air intake is greater than that of the second chamber at the end of its air intake. The first chamber, the fourth chamber, the second chamber, and the third chamber are connected by a pressurization pipeline to sequentially pressurize the gas. Each pressurization pipeline is equipped with a check valve and a shut-off valve.

[0009] In one example, a second circulating liquid chamber is provided between the first piston rod and the second piston rod and their corresponding connecting bodies. The connecting body is provided with a second circulating liquid inlet and a second circulating liquid outlet that communicate with the second circulating liquid chamber. The second circulating liquid inlet and the second circulating liquid outlet are respectively connected to a circulating liquid pump through a second pipeline so as to continuously introduce circulating liquid into the second circulating liquid chamber to achieve liquid sealing.

[0010] In one example, a first sealing guide is provided between the first piston rod and the connecting body on both sides of the second circulating fluid chamber, and a second sealing guide is provided between the second piston rod and the connecting body on both sides of the second circulating fluid chamber.

[0011] In one example, a third sealing guide is provided on both sides of the corresponding first circulating fluid chamber between the first piston and the first cylinder, and a fourth sealing guide is provided on both sides of the corresponding first circulating fluid chamber between the second piston and the second cylinder.

[0012] In one example, the end of the first cylinder away from the connector is connected to a first cover, which has an air inlet and an air outlet communicating with the first chamber. The end of the second cylinder away from the connector is connected to a second cover, which has an air inlet and an air outlet communicating with the fourth chamber.

[0013] In one example, a cylinder liner is provided in the first cylinder block and the second cylinder block respectively, and the first piston and the second piston are respectively located in their corresponding cylinder liners.

[0014] The advantages of this utility model, which adopts the above-mentioned technical solution, are as follows: This staged liquid-driven circulating liquid-sealed compressor, by setting a first cylinder and a second cylinder on both sides of the cylinder body to form different chamber volumes, can not only stably and efficiently compress gas, but also output gas at different pressures, thus having better applicability. By connecting booster pipelines between chambers of different volumes, the gas can be further pressurized before output.

[0015] By injecting circulating fluid into the circulating fluid chamber through a circulating fluid pump, and in conjunction with structures such as sealing guides, the sealing of multiple chambers can be ensured. This not only allows for smooth compression but also prevents contamination of the compressed gas. At the same time, the circulating fluid can be used to cool structures such as pistons. Attached Figure Description

[0016] Figure 1 This is a partial cross-sectional view of Embodiment 1 of the present invention;

[0017] Figure 2 This is a partial cross-sectional view of Embodiment 2 of the present invention.

[0018] In the diagram, 1. Hydraulic station, 2. Circulating pump, 3. First pipeline, 4. Second pipeline, 5. Connector, 6. First cylinder body, 7. Oil cylinder body, 8. Second cylinder body, 9. First piston, 10. Oil piston, 11. Second piston, 12. First piston rod, 13. Second piston rod, 14. First hydraulic chamber, 15. Second hydraulic chamber, 16. First circulating fluid chamber, 17. First chamber, 18. Second chamber, 19. Third chamber, 20. Fourth chamber, 21. First intake valve, 22. First exhaust valve, 23. Second intake valve, 24. Second exhaust valve, 25. Second circulating fluid chamber. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0020] Furthermore, it should be understood that in the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0021] Example 1:

[0022] The staged liquid-driven circulating liquid-sealed compressor of this embodiment, when operating as a single-acting staged compressor, has the following structure: Figure 1As shown, it includes a compression unit, a hydraulic station 1, a circulating pump 2, several first pipelines 3, and several second pipelines 4. The compression unit includes a first cylinder 6, a hydraulic cylinder 7, and a second cylinder 8 axially connected from left to right via a connecting body 5. A first piston 9, an oil piston 10, and a second piston 11 are respectively installed in the first cylinder 6, the hydraulic cylinder 7, and the second cylinder 8. A first piston rod 12 connects the oil piston 10 to the first piston 9, and a second piston rod 13 connects the oil piston 10 to the second piston 11. The oil piston 10 has a left side forming... A first hydraulic chamber 14 is formed, and a second hydraulic chamber 15 is formed on the right side. Hydraulic oil ports are respectively provided on the cylinder bodies 7 corresponding to the first and second hydraulic chambers 14 and 15. These hydraulic oil ports are connected to the hydraulic station 1 via a first pipeline 3 to alternately supply hydraulic oil to the first and second hydraulic chambers 14 and 15, driving the first piston 9 and second piston 11 to reciprocate. Regarding the arrangement of the hydraulic oil ports, one port can be provided for the inlet and outlet of hydraulic oil in one side of the hydraulic chamber, or two ports can be provided for the inlet and outlet of hydraulic oil respectively. First circulating fluid chambers 16 are formed between the first piston 9 and the first cylinder body 6, and between the second piston 11 and the second cylinder body 8. The first cylinder body 6 and the second cylinder body 8 are respectively provided with a first circulating fluid inlet and a first circulating fluid outlet communicating with their respective first circulating fluid chambers 16. The first circulating fluid inlet and the first circulating fluid outlet are respectively connected to the circulating fluid pump 2 via a second pipeline 4 to continuously supply circulating fluid into the first circulating fluid chambers 16 to achieve liquid sealing. A first chamber 17 can be formed on the left side of the first piston 9, and a second chamber 18 can be formed on the right side. The second piston 11 can form a third chamber 19 on its left side and a fourth chamber 20 on its right side. The first cylinder 6 corresponding to the first chamber 17 and the second chamber 18, and the second cylinder 8 corresponding to the third chamber 19 and the fourth chamber 20 are respectively provided with an air inlet and an air outlet. The first air inlet of the first chamber 17 and the fourth chamber 20 are provided with a first air inlet valve 21 and the first air outlet is provided with a first air outlet valve 22. The volume of the first chamber 17 at the end of air intake is greater than the volume of the fourth chamber 20 at the end of air intake, so as to output gas with differential pressure.

[0023] Furthermore, a third sealing guide is provided on both sides of the corresponding first circulating fluid chamber 16 between the first piston 9 and the first cylinder 6, and a fourth sealing guide is provided on both sides of the corresponding first circulating fluid chamber between the second piston 11 and the second cylinder 8.

[0024] Furthermore, for ease of processing and installation, the first cylinder body 6 is connected to a first cover at the end away from the connecting body 5. The first cover is provided with an air inlet and an air outlet communicating with the first chamber. The second cylinder body is connected to a second cover at the end away from the connecting body. The second cover is provided with an air inlet and an air outlet communicating with the fourth chamber.

[0025] Furthermore, for wear resistance, a cylinder liner is provided in the first cylinder block and the second cylinder block respectively, and the first piston and the second piston are respectively located in their corresponding cylinder liners.

[0026] When the compressor is working, circulating fluid is first introduced into the first circulating fluid chamber through a circulating fluid pump to seal and cool the first piston and the first cylinder, and the second piston and the second cylinder. Each first circulating fluid chamber can be equipped with a separate circulating fluid pump, or they can share one. Then, hydraulic oil is alternately injected into the first hydraulic chamber and the second hydraulic chamber through a hydraulic station to alternately and stably compress the gas in the first chamber and the fourth chamber. Since the two chambers have different volumes, after the same volume of gas is input, the gas pressure output after compression is different, resulting in a pressure differential, which meets the different pressure output requirements.

[0027] Example 2:

[0028] The staged liquid-driven circulating liquid-sealed compressor of this embodiment, when operating as a double-acting staged compressor, further includes the following structure based on Embodiment 1: (e.g.) Figure 2 As shown, a second intake valve 23 is provided at the air inlet of the second chamber 18 and a second outlet valve 24 is provided at the air outlet. The volume of the second chamber 18 at the end of air intake is greater than the volume of the third chamber 19 at the end of air intake, so that the two can output differential pressure. That is, during operation, compressed gas can be output from both sides of the first piston and the second piston for the first cylinder and the second cylinder.

[0029] Furthermore, in order to ensure a good seal between the second chamber 18 and the third chamber 19, a second circulating liquid chamber 25 is provided between the first piston rod 12 and the second piston rod 13 and their corresponding connecting bodies 5. The connecting body is provided with a second circulating liquid inlet and a second circulating liquid outlet that communicate with the second circulating liquid chamber. The second circulating liquid inlet and the second circulating liquid outlet are respectively connected to the circulating liquid pump 2 through the second pipeline 4, so as to continuously introduce circulating liquid into the second circulating liquid chamber to achieve liquid sealing and cooling.

[0030] Furthermore, a first sealing guide is provided on both sides of the corresponding second circulating fluid chamber 25 between the first piston rod 12 and the connecting body 5; a second sealing guide is provided on both sides of the corresponding second circulating fluid chamber between the second piston rod 12 and the connecting body; and a fifth sealing guide is provided between the oil piston and the oil cylinder body. Regarding the sealing guides mentioned above, the following structure may be adopted, but is not limited to: specifically including a guide ring provided on the first piston and sealing rings provided on both sides of the guide ring.

[0031] Example 3:

[0032] In this embodiment of the differential liquid-driven circulating liquid-sealed compressor, for convenient gas pressurization, the following configuration can be made: Specifically, based on Embodiment 2, the volume of the fourth chamber 20 at the end of its intake is larger than the volume of the second chamber 18 at the end of its intake. Pressurization lines are connected between the first chamber 17, the fourth chamber 20, the second chamber 18, and the third chamber 19 to sequentially pressurize the gas. Each pressurization line is also equipped with a check valve and a shut-off valve as needed. In use, after the gas passes through several chambers sequentially, the required pressure is reached more easily than with direct pressurization. Details regarding the pressurization lines and other structures are not described in detail below. Figure 1 and Figure 2 As shown in the figure, but in actual application, it can be set according to specific needs.

[0033] The above-described specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0034] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A liquid-sealed compressor of the liquid-driven cycle type, characterized in that, The system includes a compression unit, a hydraulic station, a circulating pump, several first pipelines, and several second pipelines. The compression unit comprises a first cylinder body, a hydraulic cylinder body, and a second cylinder body, axially connected from left to right via a connecting body. A first piston, a hydraulic piston, and a second piston are respectively disposed within the first cylinder body, the hydraulic cylinder body, and the second cylinder body. A first piston rod connects the hydraulic piston to the first piston, and a second piston rod connects the hydraulic piston to the second piston. A first hydraulic chamber is formed on the left side of the hydraulic piston, and a second hydraulic chamber is formed on the right side. Hydraulic ports are respectively provided on the hydraulic cylinder body corresponding to the first and second hydraulic chambers. The hydraulic port is connected to the hydraulic station through the first pipeline to alternately supply hydraulic oil to the first hydraulic chamber and the second hydraulic chamber to drive the first piston and the second piston to reciprocate. A first circulating fluid chamber is formed between the first piston and the first cylinder and between the second piston and the second cylinder. The first cylinder and the second cylinder are respectively provided with a first circulating fluid inlet and a first circulating fluid outlet communicating with the corresponding first circulating fluid chamber. The first circulating fluid inlet and the first circulating fluid outlet are respectively connected to the circulating fluid pump through the second pipeline to continuously supply circulating fluid into the first circulating fluid chamber to achieve liquid sealing. The first piston can form a first chamber on its left side and a second chamber on its right side. The second piston can form a third chamber on its left side and a fourth chamber on its right side. The first cylinder corresponding to the first and second chambers, and the second cylinder corresponding to the third and fourth chambers, are respectively provided with an air inlet and an air outlet. The air inlets of the first and fourth chambers are provided with a first air inlet valve, and the air outlets are provided with a first air outlet valve. The volume of the first chamber at the end of air intake is greater than the volume of the fourth chamber at the end of air intake, so that the two can output gas with a differential pressure.

2. The cascade liquid drive cycle liquid sealed compressor of claim 1, wherein, The second chamber and the third chamber are equipped with a second air inlet valve at the air inlet and a second air outlet valve at the air outlet. The volume of the second chamber at the end of the air intake is greater than that of the third chamber at the end of the air intake, so that the two can output differential pressure.

3. The cascade liquid drive cycle liquid sealed compressor of claim 2, wherein, The volume of the fourth chamber at the end of its air intake is greater than that of the second chamber at the end of its air intake. The first chamber, the fourth chamber, the second chamber, and the third chamber are connected by a pressurization pipeline to sequentially pressurize the gas. Each pressurization pipeline is equipped with a check valve and a shut-off valve.

4. The cascade liquid drive cycle liquid sealed compressor according to claim 2 or 3, characterized in that, The first piston rod and the second piston rod are respectively provided with a second circulating liquid chamber between their corresponding connecting bodies. The connecting body is provided with a second circulating liquid inlet and a second circulating liquid outlet that communicate with the second circulating liquid chamber. The second circulating liquid inlet and the second circulating liquid outlet are respectively connected to the circulating liquid pump through a second pipeline so as to continuously introduce circulating liquid into the second circulating liquid chamber to achieve liquid sealing.

5. The cascade liquid drive cycle liquid-sealed compressor of claim 4, wherein, A first sealing guide is provided on both sides of the corresponding second circulating liquid chamber between the first piston rod and the connecting body, and a second sealing guide is provided on both sides of the corresponding second circulating liquid chamber between the second piston rod and the connecting body.

6. The staged liquid-driven circulating liquid-sealed compressor according to claim 1, characterized in that, A third sealing guide is provided on both sides of the corresponding first circulating fluid chamber between the first piston and the first cylinder, and a fourth sealing guide is provided on both sides of the corresponding first circulating fluid chamber between the second piston and the second cylinder.

7. The cascade liquid drive cycle liquid-sealed compressor of claim 1, wherein, The first cylinder body is connected to a first cover at the end away from the connecting body. The first cover is provided with an air inlet and an air outlet communicating with the first chamber. The second cylinder body is connected to a second cover at the end away from the connecting body. The second cover is provided with an air inlet and an air outlet communicating with the fourth chamber.

8. The cascade liquid drive cycle liquid-sealed compressor of claim 1, wherein, The first cylinder block and the second cylinder block are each provided with a cylinder liner, and the first piston and the second piston are respectively provided in their corresponding cylinder liners.

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