CN116892496B - A circulating liquid-sealed compression cylinder with pressure relief and liquid storage function - Google Patents
A circulating liquid-sealed compression cylinder with pressure relief and liquid storage function Download PDFInfo
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- CN116892496B CN116892496B CN202311013102.2A CN202311013102A CN116892496B CN 116892496 B CN116892496 B CN 116892496B CN 202311013102 A CN202311013102 A CN 202311013102A CN 116892496 B CN116892496 B CN 116892496B
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- piston
- sealing ring
- liquid
- pressure relief
- circulating
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- 239000007788 liquid Substances 0.000 title claims abstract description 105
- 230000006835 compression Effects 0.000 title claims abstract description 14
- 238000007906 compression Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 98
- 238000004891 communication Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims 6
- 238000001816 cooling Methods 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 239000011550 stock solution Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
- F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to the technical field of circulating liquid seal compressors, in particular to a circulating liquid seal compression cylinder with a pressure relief and liquid storage function. The outside of piston is equipped with the circulation chamber, and the piston surface at circulation chamber both ends is equipped with two sealing washer structures respectively, and two sealing washer structures are equipped with the relief groove including first sealing washer and the second sealing washer that the interval set up between first sealing washer and the second sealing washer, is equipped with the stock solution chamber in the piston, and the stock solution chamber is linked together with the relief groove through establishing the intercommunication passageway in the piston. Even if one sealing ring is damaged, the other sealing ring can still keep the sealing effect, so that the sealing grade and the sealing effect are improved, the instantaneous pressure of circulating liquid between the first sealing ring and the second sealing ring can be reduced when the piston moves at a high speed by the pressure relief groove, the impact force of the circulating liquid on the sealing ring is reduced, and the first sealing ring and the second sealing ring are protected. Circulating liquid in the pressure relief groove can enter the liquid storage cavity through the communication channel for storage, and the storage capacity of the leaked circulating liquid is greatly increased.
Description
Technical field:
the invention relates to the technical field of circulating liquid seal compressors, in particular to a circulating liquid seal compression cylinder with a pressure relief and liquid storage function.
The background technology is as follows:
the circulating liquid seal compressor drives a piston in a cylinder body of the cylinder to reciprocate mainly through a driving mechanism so as to realize supercharging of gas. As disclosed in the patent application publication No. CN114439728a, a circulating liquid seal compressor is disclosed, which is configured to store a circulating liquid by providing an annular cavity between a piston and a cylinder block, and to lubricate, cool and seal the circulating liquid, wherein sealing rings are provided on both sides of the annular cavity, respectively, so as to seal the circulating liquid in the annular cavity. The structure form of the single sealing ring is arranged on each side, the safety coefficient is low, and once the sealing ring is damaged, the sealing failure condition can occur, so that circulating liquid and compressed gas leak. If only a double sealing ring is simply arranged on each side, a small amount of circulating liquid is not prevented from leaking between the two sealing rings in the reciprocating motion process of the piston, the instantaneous pressure of the circulating liquid between the two sealing rings is increased when the piston moves at a high speed, the impact on the sealing rings is continuously caused, the service life of the sealing rings is reduced, the sealing rings are even directly damaged when the pressure is overlarge, and no good method for solving the problems exists at present.
In summary, the problem of sealing two sides of an annular cavity in a circulating liquid seal compressor has become a technical problem to be solved in the industry.
The invention comprises the following steps:
The invention provides a circulating liquid seal compression cylinder with a pressure relief and liquid storage function, which aims to overcome the defects of the prior art and solves the problems that the safety coefficient of a single sealing ring is low, and the leakage of circulating liquid and compressed gas is easy to occur due to sealing failure.
The technical scheme adopted by the invention for solving the technical problems is as follows:
The circulating liquid seal compression cylinder with the pressure relief and liquid storage functions comprises a cylinder body, wherein a piston structure is arranged in the cylinder body, cylinder glands and cylinder bases are arranged at two ends of the cylinder body, the piston structure comprises a piston rod and a piston, the piston is movably arranged in the cylinder body, the piston rod is movably arranged in the cylinder gland, an air inlet and an air outlet are formed in the cylinder body, a circulating cavity is formed in the outer side surface of the piston, the circulating cavity is used for storing circulating liquid to cool, lubricate and liquid seal the cylinder body, and a liquid inlet and a liquid outlet which are communicated with the circulating cavity are formed in the cylinder body; the piston outer side surfaces at two ends of the circulating cavity are respectively provided with a double-sealing-ring structure, the double-sealing-ring structure comprises a first sealing ring and a second sealing ring which are arranged at intervals, a pressure relief groove is arranged between the first sealing ring and the second sealing ring, and the pressure relief groove is used for storing circulating liquid so as to reduce the instantaneous pressure between the first sealing ring and the second sealing ring and protect the first sealing ring and the second sealing ring; the piston is internally provided with a liquid storage cavity, the liquid storage cavity is communicated with the pressure relief groove through a communication channel arranged in the piston, and the liquid storage cavity is used for storing circulating liquid in the pressure relief groove.
The pressure relief groove is annular and is arranged on the outer surface of the piston.
The number of the pressure relief grooves is one or more.
And a guide belt arranged on the outer side surface of the piston is arranged between the first sealing ring and the second sealing ring.
The communication channel comprises a radial channel and an axial channel, the radial channel is communicated with the pressure relief groove, the axial channel is communicated with the liquid storage cavity, and a one-way valve is arranged between the radial channel and the axial channel.
The one-way valve comprises a valve seat, a spring and a steel ball are arranged in the valve seat, an inlet of the valve seat is communicated with the radial channel, and an outlet of the valve seat is communicated with the axial channel.
The valve seat is mounted in a valve seat groove at the end of the piston.
The liquid storage cavity is annularly arranged on the inner side of the piston.
And third sealing rings are respectively arranged between the inner side surfaces of the pistons at the two ends of the liquid storage cavity and the piston rod.
The invention adopts the scheme and has the following advantages:
the two sealing ring structures are respectively arranged on the outer side surfaces of the pistons at the two ends of the circulating cavity, so that even if one sealing ring is damaged, the other sealing ring can also keep the sealing effect, thereby improving the sealing grade and the sealing effect; the pressure relief groove is arranged between the first sealing ring and the second sealing ring, a small amount of circulating liquid leaking between the two sealing rings can be stored in the pressure relief groove, and the instantaneous pressure of the circulating liquid between the first sealing ring and the second sealing ring can be reduced when the piston moves at a high speed, so that the impact force of the circulating liquid on the sealing rings is reduced, the first sealing ring and the second sealing ring are protected, and the service life and the sealing effect of the sealing rings are ensured; through being equipped with the stock solution chamber in the piston, the circulation liquid in the pressure release groove can get into the stock solution chamber through the intercommunication passageway and store, greatly increased the storage capacity to leaking circulation liquid.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged schematic view of the portion a in fig. 1.
In the figure, 1, a piston rod, 2, a piston, 3, a circulating cavity, 4, a first sealing ring, 5, a second sealing ring, 6, a pressure relief groove, 7, a guide belt, 8, a liquid storage cavity, 9, a radial channel, 10, an axial channel, 11, a valve seat, 12, a spring, 13, a steel ball, 14, a valve seat groove, 15, a third sealing ring, 16, a cylinder body, 17, a cylinder gland, 18, a cylinder base, 19, a liquid inlet, 20 and a liquid outlet.
The specific embodiment is as follows:
In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-2, a circulating liquid seal compression cylinder with pressure relief and liquid storage functions comprises a cylinder body 16, wherein a piston structure is arranged in the cylinder body 16, cylinder glands 17 and cylinder bases 18 are arranged at two ends of the cylinder body 16, the piston structure comprises a piston rod 1 and a piston 2, the piston 2 is movably arranged in the cylinder body 16, the piston rod 1 is movably arranged in the cylinder glands 17, an air inlet and an air outlet are formed in the cylinder body 16, a circulating cavity 3 is formed in the outer side surface of the piston 2, the circulating cavity 3 is used for storing circulating liquid to cool, lubricate and liquid seal the cylinder body 16, and a liquid inlet 19 and a liquid outlet 20 which are communicated with the circulating cavity 3 are formed in the cylinder body 16; the outer side surfaces of the pistons 2 at the two ends of the circulating cavity 3 are respectively provided with a double-sealing-ring structure, the double-sealing-ring structure comprises a first sealing ring 4 and a second sealing ring 5 which are arranged at intervals, a pressure relief groove 6 is arranged between the first sealing ring 4 and the second sealing ring 5, and the pressure relief groove 6 is used for storing circulating liquid so as to reduce the instantaneous pressure between the first sealing ring 4 and the second sealing ring 5 and protect the first sealing ring 4 and the second sealing ring 5; the piston 2 is internally provided with a liquid storage cavity 8, the liquid storage cavity 8 is communicated with the pressure relief groove 6 through a communication channel arranged in the piston 2, and the liquid storage cavity 8 is used for storing circulating liquid in the pressure relief groove 6.
The pressure relief groove 6 is arranged on the outer surface of the piston 2 in an annular mode, and can store a small amount of circulating liquid leaked between the first sealing ring 4 and the second sealing ring 5.
The number of the pressure relief grooves 6 is one or more.
A guide belt 7 arranged on the outer side surface of the piston is arranged between the first sealing ring 4 and the second sealing ring 5 and used for guiding and supporting the movement of the piston.
The communication channel comprises a radial channel 9 and an axial channel 10, the radial channel 9 is communicated with the pressure relief groove 6, the axial channel 10 is communicated with the liquid storage cavity 8, and a one-way valve is arranged between the radial channel 9 and the axial channel 10. The circulating liquid in the pressure relief groove 6 can enter the one-way valve through the radial channel 9 and then enter the liquid storage cavity 8 through the axial channel 10.
The one-way valve comprises a valve seat 11, a spring 12 and a steel ball 13 are arranged in the valve seat 11, an inlet of the valve seat 11 is communicated with the radial channel 9, and an outlet of the valve seat 11 is communicated with the axial channel 10. When the circulating hydraulic pressure in the pressure relief groove 6 is overlarge, the circulating liquid can squeeze the steel balls 13, the steel balls 13 squeeze the springs 12 to move inwards, and at the moment, the circulating liquid can enter the liquid storage cavity 8 through the one-way valve for storage.
The valve seat 11 is arranged in a valve seat groove 14 at the end part of the piston 2, so that the valve seat is convenient to assemble and disassemble.
The liquid storage cavity 8 is annularly arranged on the inner side of the piston 2.
And third sealing rings 15 are respectively arranged between the inner side surfaces of the pistons 2 at the two ends of the liquid storage cavity 8 and the piston rod 1, so that circulating liquid can be prevented from leaking outwards from gaps between the pistons 2 and the piston rod 1.
Working principle:
During operation, in the reciprocating motion process of the piston 2, circulating liquid enters the circulating cavity 3 from the liquid inlet 19 and is discharged from the liquid outlet 20, and even if one sealing ring is damaged, the other sealing ring can still keep sealing effect, so that the sealing grade and sealing effect are improved; a small amount of circulating liquid leaking from the circulating cavity 3 to the space between the first sealing ring 4 and the second sealing ring 5 can be stored in the pressure relief groove 6, so that the instantaneous pressure of the circulating liquid between the first sealing ring 4 and the second sealing ring 5 during high-speed movement of the piston is reduced, the impact force of the circulating liquid on the sealing rings is reduced, and the first sealing ring 4 and the second sealing ring 5 are protected. When the circulation hydraulic pressure in the pressure release groove 6 is overlarge, the circulation liquid can enter the valve seat 11 through the radial channel 9 to squeeze the steel balls 13, the steel balls 13 squeeze the spring 12 to move inwards to generate gaps, and at the moment, the circulation liquid can enter the valve seat 11 and then enter the liquid storage cavity 8 through the axial channel 10 to be stored, so that the problem of overlarge pressure caused by full circulation liquid in the pressure release groove 6 is effectively solved. If the liquid storage cavity 8 is full due to overlarge leakage of the circulating liquid, the liquid level in the circulating liquid loop is obviously reduced, and a worker can stop and maintain in time.
The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and fall within the scope of the invention.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311013102.2A CN116892496B (en) | 2023-08-11 | 2023-08-11 | A circulating liquid-sealed compression cylinder with pressure relief and liquid storage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311013102.2A CN116892496B (en) | 2023-08-11 | 2023-08-11 | A circulating liquid-sealed compression cylinder with pressure relief and liquid storage function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116892496A CN116892496A (en) | 2023-10-17 |
| CN116892496B true CN116892496B (en) | 2024-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311013102.2A Active CN116892496B (en) | 2023-08-11 | 2023-08-11 | A circulating liquid-sealed compression cylinder with pressure relief and liquid storage function |
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| Country | Link |
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| CN (1) | CN116892496B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118188410B (en) * | 2024-04-01 | 2025-02-07 | 北京石油化工学院 | Piston liquid seal structure and liquid-driven piston compressor for hydrogen energy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643252A (en) * | 2002-03-28 | 2005-07-20 | 韦斯特波特研究公司 | Reciprocable piston with a fluid scavenging system and method of scavenging a fluid |
| CN203098466U (en) * | 2013-03-01 | 2013-07-31 | 徐州徐工液压件有限公司 | Piston structure eliminating back pressure |
| CN105697183A (en) * | 2016-04-22 | 2016-06-22 | 甘勇 | Piston body oil chamber sealing device |
| CN115750297A (en) * | 2022-11-14 | 2023-03-07 | 烟台东德氢能技术有限公司 | Multistage gas compressor that star type was arranged |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3902658C2 (en) * | 1989-01-30 | 1997-08-28 | Knorr Bremse Systeme | Piston compressor |
| ITMI20012826A1 (en) * | 2001-12-28 | 2003-06-28 | Nuovo Pignone Spa | SEALING ELEMENT WITH REDUCED WEAR, IN PARTICULAR FOR CYLINDERS AND PISTONS OF ALTERNATIVE COMPRESSORS |
| DE102005012203A1 (en) * | 2005-03-15 | 2006-09-28 | Itg Kompressoren Gmbh | Piston compressor with plunger |
| ITPI20070006A1 (en) * | 2007-01-22 | 2008-07-23 | Iginio Benedetti | STRUCTURE FOR ALTERNATIVE VOLUMETRIC COMPRESSORS, IN PARTICULAR FOR HYDROGEN GAS, AND RELATIVE VOLUMETRIC COMPRESSORS |
| CN102168760B (en) * | 2011-04-12 | 2015-05-13 | 皇甫岳伟 | Sealing structure with favorable safety for piston cylinder |
| CN112539155B (en) * | 2020-12-04 | 2022-11-25 | 中石化石油机械股份有限公司研究院 | Can monitor multiple sealed liquid drive formula hydrogen compressor |
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2023
- 2023-08-11 CN CN202311013102.2A patent/CN116892496B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643252A (en) * | 2002-03-28 | 2005-07-20 | 韦斯特波特研究公司 | Reciprocable piston with a fluid scavenging system and method of scavenging a fluid |
| CN203098466U (en) * | 2013-03-01 | 2013-07-31 | 徐州徐工液压件有限公司 | Piston structure eliminating back pressure |
| CN105697183A (en) * | 2016-04-22 | 2016-06-22 | 甘勇 | Piston body oil chamber sealing device |
| CN115750297A (en) * | 2022-11-14 | 2023-03-07 | 烟台东德氢能技术有限公司 | Multistage gas compressor that star type was arranged |
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| CN116892496A (en) | 2023-10-17 |
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