CN111173744A - Online oil supplementing device and method for screw type refrigeration compressor unit - Google Patents
Online oil supplementing device and method for screw type refrigeration compressor unit Download PDFInfo
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- CN111173744A CN111173744A CN201811335976.9A CN201811335976A CN111173744A CN 111173744 A CN111173744 A CN 111173744A CN 201811335976 A CN201811335976 A CN 201811335976A CN 111173744 A CN111173744 A CN 111173744A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
An on-line oil supplementing device of a screw type refrigeration compressor unit is provided with a high-level oil reservoir; an oil discharge pipeline and an oil discharge stop valve are communicated between the bottom of the high-level oil reservoir and the top of the oil-gas separator; the top of the high-level oil reservoir is communicated with a gas emptying pipeline and an emptying stop valve; a pressure balance pipeline and a pressure balance stop valve are communicated between the part of the gas emptying pipeline positioned at the upstream of the emptying stop valve and the part of the oil discharge pipeline positioned at the downstream of the oil discharge stop valve; the oil supplementing pipeline extends into the bottom of the high-level oil reservoir, and an oil supplementing stop valve is installed on the oil supplementing pipeline. When the online oil supplementing device is used for supplementing oil, the screw type refrigeration compressor unit does not need to be stopped, the oil supplementing operation is simple, and the consumed time is short. The invention also discloses an oil supplementing method of the online oil supplementing device.
Description
Technical Field
The invention relates to lubrication of mechanical equipment, in particular to an online oil supplementing device and an oil supplementing method for a screw type refrigeration compressor unit.
Background
An on-line oil-supplementing device of a screw type refrigeration compressor unit is shown in figure 2, and the on-line oil-supplementing device and the oil-supplementing method of the screw type refrigeration compressor unit comprise a screw type refrigeration compressor unit 1, an oil-gas separator 2, an oil cooler 3 and an oil pump 4.
The screw refrigeration compressor unit 1 includes a plurality of screw refrigeration compressors 11 and a plurality of motors 12 for driving the plurality of screw refrigeration compressors 11.
An oil level gauge 21 is installed at one end of the oil separator 2. A pressure display gauge 22 is installed on the top of the oil separator 2.
The low pressure ammonia gas inlet of the screw refrigeration compressor 11 communicates with a low pressure ammonia gas suction line 61. A suction stop valve 611 and a suction check valve 612 are installed on the low-pressure ammonia suction line 61. A high-pressure gas ammonia outlet pipeline 62 is connected between the high-pressure gas ammonia outlet of the screw-type refrigeration compressor 11 and the top of the oil-gas separator 2.
And a screw type refrigeration compressor oil inlet pipeline 63 is connected between the low-pressure inlet of the screw type refrigeration compressor 11 and the bottom of the oil-gas separator 2. The oil cooler 3 and the oil pump 4 are mounted on the screw refrigeration compressor oil inlet line 63.
A high-pressure gas ammonia discharge line 64 is connected to the top of the oil separator 2. An exhaust shutoff valve 641 is installed in the high-pressure ammonia discharge line 64.
An oil replenishment line 81 communicates with the inlet of the oil pump 4. An oil supply shutoff valve 811 is installed in the oil supply line 81. The oil replenishment line 81 communicates with a lubricating oil tank (not shown).
When the screw type refrigeration compressor unit 1 works, low-pressure gas ammonia enters the screw type refrigeration compressor 11 through the low-pressure gas ammonia suction pipeline 61, and the volume of a compression chamber is gradually reduced when a rotor of the screw type refrigeration compressor 11 rotates, so that the low-pressure gas ammonia is compressed to form high-pressure gas ammonia. In order to make the screw type refrigeration compressor unit 1 work normally, lubricating oil needs to be sprayed into a working cavity of the screw type refrigeration compressor 11, so that the working cavity is sealed and cooled, and a bearing, a shaft seal and a balance piston are lubricated and cooled. Therefore, the high-pressure gas ammonia discharged from the screw type refrigeration compressor 11 carries a certain amount of lubricating oil mist to form an oil-gas mixture, oil-gas separation is carried out through the oil-gas separator 2 to obtain pure high-pressure gas ammonia containing a small amount of lubricating oil mist, subsequent processes such as an evaporative condenser and the like can be carried out, the separated lubricating oil enters the oil cooler 3, and the lubricating oil is pressurized and sprayed into a working cavity of the screw type refrigeration compressor 11 through the oil pump 4 after being cooled, so that the circulating use is realized.
However, the efficiency of the oil-gas separator 2 cannot reach 100%, and the high-pressure ammonia carries a small amount of lubricating oil mist to the subsequent process, so that the amount of the lubricating oil in the screw type refrigeration compressor unit 1 system is slowly reduced, and when the oil level of the oil level gauge 21 of the oil-gas separator 2 is reduced to a certain degree, the lubricating oil must be supplemented to ensure the normal operation of the screw type refrigeration compressor unit 1.
The on-line oil supplementing device of the existing screw refrigeration compressor unit shown in fig. 2 utilizes the oil pump 4 to supplement oil, and needs to be carried out under the condition that the system of the screw refrigeration compressor unit 1 has no pressure, and the specific operation is as follows:
1. the intake shutoff valve 611 is closed, the exhaust shutoff valve 641 is opened, all of the ammonia gas in the screw refrigeration compressor 11 and the oil-gas separator 2 is discharged, and then the exhaust shutoff valve 641 is closed.
2. The oil supplementing pipeline 81 is communicated with the lubricating oil barrel, the oil supplementing stop valve 811 is opened, the oil pump 4 is started, the lubricating oil in the oil barrel is sucked into the oil pump 4 by utilizing the micro negative pressure formed at the inlet of the oil pump 4, and the oil is supplemented to the screw type refrigeration compressor 11 through the oil supplementing pipeline 81 and the oil inlet pipeline 63 of the screw type refrigeration compressor.
3. When the oil level of the oil level gauge 21 of the gas-oil separator 2 returns to normal, the oil pump 4 is stopped, and the oil supply shutoff valve 811 is closed.
The on-line oil supplementing device and the oil supplementing method of the existing screw type refrigeration compressor unit shown in figure 2 have obvious disadvantages:
1. the screw type refrigeration compressor unit 1 needs to be stopped, and refrigeration production is affected.
2. Before oil is supplemented, the screw type refrigeration compressor unit 1 needs to be isolated, and the system pressure of the screw type refrigeration compressor unit 1 needs to be removed, so that the time is long.
Disclosure of Invention
The invention provides a novel online oil supplementing device and an oil supplementing method for a screw type refrigeration compressor unit, aiming at solving the technical problems that the screw type refrigeration compressor unit needs to be stopped and the oil supplementing time is long when the oil is supplemented by the conventional online oil supplementing device and the conventional oil supplementing method for the screw type refrigeration compressor unit.
The invention relates to an online oil supplementing device of a screw type refrigeration compressor unit, which is provided with a screw type refrigeration compressor and an oil-gas separator; the low-pressure ammonia gas suction pipeline is communicated with a low-pressure ammonia gas inlet of the screw type refrigeration compressor; the high-pressure gas ammonia outlet pipeline is communicated between a high-pressure gas ammonia outlet of the screw type refrigeration compressor and the top of the oil-gas separator; the method is characterized in that:
a high-level oil reservoir is also arranged;
an oil discharge pipeline is communicated between the bottom of the high-level oil reservoir and the top of the oil-gas separator, and an oil discharge stop valve is installed on the oil discharge pipeline;
the top of the high-level oil reservoir is communicated with a gas emptying pipeline, and an emptying stop valve is arranged on the gas emptying pipeline;
a pressure balance pipeline is communicated between the part of the gas emptying pipeline positioned at the upstream of the emptying stop valve and the part of the oil discharge pipeline positioned at the downstream of the oil discharge stop valve, the pressure balance pipeline is provided with the pressure balance stop valve, or a pressure balance pipeline is communicated between the part of the gas emptying pipeline positioned at the upstream of the emptying stop valve and the top of the oil-gas separator, and the pressure balance pipeline is provided with the pressure balance stop valve;
the oil supplementing pipeline extends into the high-position oil reservoir from the top of the high-position oil reservoir, extends downwards to reach the bottom of the high-position oil reservoir, and the oil supplementing stop valve is installed on the oil supplementing pipeline.
The invention relates to an online oil supplementing method for a screw type refrigeration compressor unit, which is characterized by comprising the following steps: comprising the following steps in sequence:
1. the oil supplementing stop valve, the emptying stop valve, the pressure balance stop valve, the oil discharging stop valve and the pressure relief stop valve are all in a closed state, and an oil level liquid level gauge and a pressure display gauge of the high-level oil reservoir have no reading;
2. the oil level of an oil level gauge of the oil-gas separator is gradually reduced to reach the liquid level needing oil supplement, the oil supplement stop valve and the emptying stop valve are opened at the moment, lubricating oil is supplemented into the high-level oil reservoir from the oil drum through an oil supplement pipeline, and the oil supplement stop valve and the emptying stop valve are closed when the liquid level is displayed by the oil level gauge of the high-level oil reservoir to the high position;
3. opening the pressure balance stop valve, enabling the high-pressure ammonia gas in the top space of the oil-gas separator to enter the high-level oil reservoir through the oil discharge pipeline, the pressure balance pipeline and the pressure relief pipeline, or enabling the high-pressure ammonia gas in the top space of the oil-gas separator to enter the high-level oil reservoir through the pressure balance pipeline and the pressure relief pipeline, and establishing pressure in the high-level oil reservoir and balancing the pressure in the oil-gas separator;
4. when the pressure indicated by the pressure indicator of the high-level oil reservoir is the same as the pressure indicated by the pressure indicator of the oil-gas separator, indicating that the pressure is balanced, the oil discharge stop valve can be opened at the moment, and the lubricating oil in the high-level oil reservoir is discharged into the oil-gas separator through the oil discharge pipeline by utilizing gravity;
5. when the oil level gauge of the high-level oil reservoir displays that the liquid level is zero or the oil level of the oil level gauge of the oil-gas separator is recovered to be normal, closing the pressure balance stop valve and the oil discharge stop valve;
6. opening an emptying stop valve, and unloading the pressure of the high-level oil reservoir to normal pressure;
7. when the pressure display meter of the high-level oil reservoir has no reading, the pressure is discharged, the emptying stop valve is closed, the high-level oil reservoir returns to the initial state, and oil supplement is finished.
Compared with the existing online oil supplementing device and oil supplementing method of the screw type refrigeration compressor unit, the online oil supplementing device and oil supplementing method of the screw type refrigeration compressor unit have the advantages that the screw type refrigeration compressor unit does not need to be stopped during oil supplementing, and refrigeration production is not influenced; before or during oil supplement, the screw type refrigeration compressor unit does not need to be isolated and the pressure of the screw type refrigeration compressor unit system does not need to be removed, and the oil supplement operation is simple and consumes short time.
Preferably, a pressure relief line is communicated between a portion of the low-pressure ammonia gas suction line located upstream of the suction cutoff valve and a top portion of the high-level oil reservoir, and the pressure relief cutoff valve is mounted on the pressure relief line.
Preferably, between step 5 and step 6, the following steps are added:
after the pressure balance stop valve and the oil discharge stop valve are determined to be closed, slowly opening the pressure relief stop valve, and recovering high-pressure ammonia gas in the high-level oil reservoir to a low-pressure ammonia gas suction pipeline through a pressure relief pipeline;
when the pressure indicated by the pressure indicator of the high-level oil reservoir is the same as the pressure in the low-pressure ammonia gas suction pipeline, the pressure of the high-level oil reservoir is released to a low-pressure state, and the pressure relief stop valve is closed.
Drawings
FIG. 1 is a schematic diagram of an on-line oil supplementing device and an oil supplementing method of a screw type refrigeration compressor unit;
fig. 2 is a schematic view of an on-line oil supply device and an oil supply method of a conventional screw refrigeration compressor unit.
Detailed Description
The invention will be described in detail by means of specific embodiments with reference to the attached drawings, and the characteristics and advantages of the on-line oil supplementing device and the oil supplementing method of the screw type refrigeration compressor unit of the invention will become more apparent.
Referring to fig. 1, the on-line oil supplementing device and the oil supplementing method of the screw type refrigeration compressor unit of the invention comprise a screw type refrigeration compressor unit 1, an oil-gas separator 2, an oil cooler 3, an oil pump 4 and a high-level oil reservoir 5.
The screw refrigeration compressor unit 1 includes a plurality of screw refrigeration compressors 11 and a plurality of motors 12 for driving the plurality of screw refrigeration compressors 11.
An oil level gauge 21 is installed at one end of the oil separator 2. A pressure display gauge 22 is installed on the top of the oil separator 2.
An oil level gauge 51 is installed on one side of the high-level oil reservoir 5. A pressure indicator 52 is mounted on the top of the high level reservoir 5.
The low pressure ammonia gas inlet of the screw refrigeration compressor 11 communicates with a low pressure ammonia gas suction line 61. A suction stop valve 611 and a suction check valve 612 are installed on the low-pressure ammonia suction line 61. A high-pressure gas ammonia outlet pipeline 62 is connected between the high-pressure gas ammonia outlet of the screw-type refrigeration compressor 11 and the top of the oil-gas separator 2.
And a screw type refrigeration compressor oil inlet pipeline 63 is connected between the low-pressure inlet of the screw type refrigeration compressor 11 and the bottom of the oil-gas separator 2. The oil cooler 3 and the oil pump 4 are mounted on the screw refrigeration compressor oil inlet line 63.
A high-pressure gas ammonia discharge line 64 is connected to the top of the oil separator 2. An exhaust shutoff valve 641 is installed in the high-pressure ammonia discharge line 64.
A relief line 65 is connected between the portion of the low-pressure ammonia suction line 61 upstream of the suction cutoff valve 611 and the top of the high-level oil reservoir 5. A pressure relief shut-off valve 651 is mounted on the pressure relief line 65.
An oil drain line 66 is connected between the bottom of the high-level oil reservoir 5 and the top of the oil separator 2. An oil drain shut-off valve 661 is installed on the oil drain line 66.
A gas vent line 67 is connected to the top of the high level oil reservoir 5. A vent cut-off valve 671 is installed on the gas vent line 67. The discharge of the gas vent line 67 leads to a safe discharge position.
A pressure equalization line 68 is connected between the portion of the gas vent line 67 located upstream of the vent cut valve 671 and the portion of the drain line 66 located downstream of the oil drain cut valve 661, or a pressure equalization line 68 is connected between the portion of the gas vent line 67 located upstream of the vent cut valve 671 and the top of the gas-oil separator 2. A pressure equalization stop valve 681 is installed on the pressure equalization line 68.
An oil supply line 69 extends from the top of the high-level oil reservoir 5 into the high-level oil reservoir 5 and extends down to the bottom of the high-level oil reservoir 5. An oil supply shutoff valve 691 is installed in the oil supply line 69. The oil replenishment line 69 communicates with a lubricating oil tank (not shown).
The online oil supplementing device and the oil supplementing method of the screw type refrigeration compressor unit are specifically operated as follows:
1. the screw type refrigeration compressor unit 1 runs normally, the oil level of the oil level gauge 21 of the oil-gas separator 2 is normal, at the moment, the online oil supplementing device and the oil supplementing method of the screw type refrigeration compressor unit are not put into use, and the high-level oil reservoir 5 does not contain lubricating oil and ammonia gas and pressure, namely: the oil replenishment shutoff valve 691, the emptying shutoff valve 671, the pressure balancing shutoff valve 681, the oil drain shutoff valve 661, and the pressure relief shutoff valve 651 are all in a closed state, and the oil level gauge 51 and the pressure indicator 52 of the high-level oil reservoir 5 have no reading.
2. Along with the accumulation of the running time of the screw type refrigeration compressor unit 1, the oil level of the oil level gauge 21 of the oil-gas separator 2 is gradually reduced to reach the oil level needing oil supplement, at the moment, the oil supplement stop valve 691 and the emptying stop valve 671 are opened, lubricating oil is supplemented into the high-level oil reservoir 5 from the oil drum through the oil supplement pipeline 69 by means of a common oil gun or by means of gravity, and when the oil level gauge 51 of the high-level oil reservoir 5 displays that the liquid level reaches a high position, the oil supplement stop valve 691 and the emptying stop valve 671 are closed.
3. And (3) opening the pressure balance stop valve 681, and allowing the high-pressure ammonia gas in the headspace of the oil-gas separator 2 to enter the high-level oil reservoir 5 through the oil drain line 66, the pressure balance line 68 and the pressure relief line 65, or allowing the high-pressure ammonia gas in the headspace of the oil-gas separator 2 to enter the high-level oil reservoir 5 through the pressure balance line 68 and the pressure relief line 65, and establishing pressure in the high-level oil reservoir 5 and balancing the pressure in the oil-gas separator 2.
4. When the pressure indicated by the pressure indicator 52 of the high-level oil reservoir 5 is equal to the pressure indicated by the pressure indicator 22 of the gas-oil separator 2, indicating that the pressures are balanced, the oil drain cut-off valve 661 is opened to drain the lubricating oil in the high-level oil reservoir 5 into the gas-oil separator 2 by gravity through the oil drain line 66.
5. When the oil level gauge 51 of the high-level oil reservoir 5 indicates that the liquid level is zero or the oil level of the oil level gauge 21 of the gas-oil separator 2 has returned to normal, the pressure-balancing cutoff valve 681 and the oil-bleeding cutoff valve 661 are closed.
6. After the pressure balance stop valve 681 and the oil drain stop valve 661 are determined to be closed, the pressure relief stop valve 651 is slowly opened, and the high-pressure ammonia gas in the high-level oil reservoir 5 is recovered to the low-pressure ammonia gas suction line 61 through the pressure relief line 65.
7. When the pressure indicated by the pressure indicator 52 of the high-pressure reservoir 5 is the same as the pressure in the low-pressure ammonia suction line 61, indicating that the pressure in the high-pressure reservoir 5 is discharged to a low-pressure state, the pressure relief stop valve 651 is closed, the air release stop valve 671 is opened, and the pressure in the high-pressure reservoir 5 is discharged to the normal pressure.
8. When the pressure indicator 52 of the high-level oil reservoir 5 does not read, the pressure is discharged, the emptying stop valve 671 is closed, the high-level oil reservoir 5 returns to the initial state, and the oil supplement is finished.
Claims (4)
1. An online oil supplementing device of a screw type refrigeration compressor unit is provided with a screw type refrigeration compressor and an oil-gas separator; the low-pressure ammonia gas suction pipeline is communicated with a low-pressure ammonia gas inlet of the screw type refrigeration compressor; the high-pressure gas ammonia outlet pipeline is communicated between a high-pressure gas ammonia outlet of the screw type refrigeration compressor and the top of the oil-gas separator; the method is characterized in that:
a high-level oil reservoir is also arranged;
an oil discharge pipeline is communicated between the bottom of the high-level oil reservoir and the top of the oil-gas separator, and an oil discharge stop valve is installed on the oil discharge pipeline;
the top of the high-level oil reservoir is communicated with a gas emptying pipeline, and an emptying stop valve is arranged on the gas emptying pipeline;
a pressure balance pipeline is communicated between the part of the gas emptying pipeline positioned at the upstream of the emptying stop valve and the part of the oil discharge pipeline positioned at the downstream of the oil discharge stop valve, the pressure balance pipeline is provided with the pressure balance stop valve, or a pressure balance pipeline is communicated between the part of the gas emptying pipeline positioned at the upstream of the emptying stop valve and the top of the oil-gas separator, and the pressure balance pipeline is provided with the pressure balance stop valve;
the oil supplementing pipeline extends into the high-position oil reservoir from the top of the high-position oil reservoir, extends downwards to reach the bottom of the high-position oil reservoir, and the oil supplementing stop valve is installed on the oil supplementing pipeline.
2. The on-line oil supply device of a screw refrigeration compressor unit according to claim 1, wherein a pressure relief line is communicated between a portion of the low pressure ammonia gas suction line located upstream of the suction shut-off valve and a top portion of the high-level oil reservoir, and a pressure relief shut-off valve is installed on the pressure relief line.
3. The online oil supplementing method for the online oil supplementing device of the screw refrigeration compressor unit of claim 1, is characterized in that: comprising the following steps in sequence:
(1) the oil supplementing stop valve, the emptying stop valve, the pressure balance stop valve, the oil discharging stop valve and the pressure relief stop valve are all in a closed state, and an oil level liquid level gauge and a pressure display gauge of the high-level oil reservoir have no reading;
(2) the oil level of an oil level gauge of the oil-gas separator is gradually reduced to reach the liquid level needing oil supplement, the oil supplement stop valve and the emptying stop valve are opened at the moment, lubricating oil is supplemented into the high-level oil reservoir from the oil drum through an oil supplement pipeline, and the oil supplement stop valve and the emptying stop valve are closed when the liquid level is displayed by the oil level gauge of the high-level oil reservoir to the high position;
(3) opening the pressure balance stop valve, enabling the high-pressure ammonia gas in the top space of the oil-gas separator to enter the high-level oil reservoir through the oil discharge pipeline, the pressure balance pipeline and the pressure relief pipeline, or enabling the high-pressure ammonia gas in the top space of the oil-gas separator to enter the high-level oil reservoir through the pressure balance pipeline and the pressure relief pipeline, and establishing pressure in the high-level oil reservoir and balancing the pressure in the oil-gas separator;
(4) when the pressure indicated by the pressure indicator of the high-level oil reservoir is the same as the pressure indicated by the pressure indicator of the oil-gas separator, indicating that the pressure is balanced, the oil discharge stop valve can be opened at the moment, and the lubricating oil in the high-level oil reservoir is discharged into the oil-gas separator through the oil discharge pipeline by utilizing gravity;
(5) when the oil level gauge of the high-level oil reservoir displays that the liquid level is zero or the oil level of the oil level gauge of the oil-gas separator is recovered to be normal, closing the pressure balance stop valve and the oil discharge stop valve;
(6) opening an emptying stop valve, and unloading the pressure of the high-level oil reservoir to normal pressure;
(7) when the pressure display meter of the high-level oil reservoir has no reading, the pressure is discharged, the emptying stop valve is closed, the high-level oil reservoir returns to the initial state, and oil supplement is finished.
4. The on-line oil replenishing device of screw refrigeration compressor train of claim 1 of claim 3, characterized in that between step (5) and step (6) the following steps are added:
after the pressure balance stop valve and the oil discharge stop valve are determined to be closed, slowly opening the pressure relief stop valve, and recovering high-pressure ammonia gas in the high-level oil reservoir to a low-pressure ammonia gas suction pipeline through a pressure relief pipeline;
when the pressure indicated by the pressure indicator of the high-level oil reservoir is the same as the pressure in the low-pressure ammonia gas suction pipeline, the pressure of the high-level oil reservoir is released to a low-pressure state, and the pressure relief stop valve is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811335976.9A CN111173744B (en) | 2018-11-12 | 2018-11-12 | Online oil supplementing device and method for screw type refrigeration compressor unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811335976.9A CN111173744B (en) | 2018-11-12 | 2018-11-12 | Online oil supplementing device and method for screw type refrigeration compressor unit |
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| CN111173744A true CN111173744A (en) | 2020-05-19 |
| CN111173744B CN111173744B (en) | 2022-03-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582120A (en) * | 2021-07-21 | 2021-11-02 | 蓝星(海南)航天化工有限公司 | Helium compressor online refueling device |
| CN113738618A (en) * | 2021-08-20 | 2021-12-03 | 西安交通大学 | Oil pressure accompanying control system and method for diaphragm compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251957A (en) * | 2011-07-21 | 2011-11-23 | 上海交通大学 | On-line testing system for semi-closed screw rod type compressor and using method thereof |
| CN104833142A (en) * | 2015-06-03 | 2015-08-12 | 铜陵新梦想农牧科技有限公司 | Intelligent ammonia refrigeration device used for agricultural and sideline products |
| CN206419182U (en) * | 2016-12-20 | 2017-08-18 | 陕西延长石油（集团）有限责任公司永坪炼油厂 | A kind of pollution-free online supplementary device of lubricating oil |
| CN107620709A (en) * | 2017-07-28 | 2018-01-23 | 无锡锡压压缩机有限公司 | A kind of fuel injection helical lobe compressor adds uninstalling system |
| CN107677497A (en) * | 2017-10-30 | 2018-02-09 | 上海齐耀膨胀机有限公司 | Water vapour compressor test unit and its test method |
| CN207570151U (en) * | 2017-11-24 | 2018-07-03 | 宁夏马莲商贸有限责任公司 | It is provided with the freezer Ammonia Refrigerating Equipment of improvement type jettison gear |
-
2018
- 2018-11-12 CN CN201811335976.9A patent/CN111173744B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251957A (en) * | 2011-07-21 | 2011-11-23 | 上海交通大学 | On-line testing system for semi-closed screw rod type compressor and using method thereof |
| CN104833142A (en) * | 2015-06-03 | 2015-08-12 | 铜陵新梦想农牧科技有限公司 | Intelligent ammonia refrigeration device used for agricultural and sideline products |
| CN206419182U (en) * | 2016-12-20 | 2017-08-18 | 陕西延长石油（集团）有限责任公司永坪炼油厂 | A kind of pollution-free online supplementary device of lubricating oil |
| CN107620709A (en) * | 2017-07-28 | 2018-01-23 | 无锡锡压压缩机有限公司 | A kind of fuel injection helical lobe compressor adds uninstalling system |
| CN107677497A (en) * | 2017-10-30 | 2018-02-09 | 上海齐耀膨胀机有限公司 | Water vapour compressor test unit and its test method |
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