CN116908049B - Lubricating oil viscosity simulation detection system and method for compressor unit - Google Patents
Lubricating oil viscosity simulation detection system and method for compressor unit Download PDFInfo
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- CN116908049B CN116908049B CN202311146844.2A CN202311146844A CN116908049B CN 116908049 B CN116908049 B CN 116908049B CN 202311146844 A CN202311146844 A CN 202311146844A CN 116908049 B CN116908049 B CN 116908049B
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 106
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000004088 simulation Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 407
- 238000001816 cooling Methods 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 15
- 238000009827 uniform distribution Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 2
- 239000012071 phase Substances 0.000 description 40
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000010725 compressor oil Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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Abstract
The invention discloses a system and a method for simulating and detecting the viscosity of lubricating oil of a compressor unit, and belongs to the technical field of simulation and detection of compressor units. The lubricating oil viscosity simulation detection system of the compressor unit comprises a proportional mixing tank, a working medium tank, an oil viscosity detector, an oil pump, a heater for heating the proportional mixing tank, a cooling mechanism for cooling the working medium tank and a scale for weighing the proportional mixing tank; the processing port is connected with the working medium tank through a first pipeline, the oil viscosity detector is connected with the proportional mixing tank through an oil supply main pipeline, a first branch oil way and a second branch oil way, and the first branch oil way and the second branch oil way are connected in parallel. The detection system can simulate the oil conditions of the oil content, the oil cooling outlet and the oil supply of the compressor in the oil way of the compressor unit, can judge the feasibility of combining lubricating oil and working medium in advance, and avoids damage to the compressor caused by unsuitable viscosity of the lubricating oil in practical compressor unit equipment in the future.
Description
Technical Field
The invention relates to a system and a method for simulating and detecting the viscosity of lubricating oil of a compressor unit, and belongs to the technical field of simulation and detection of compressor units.
Background
The oil way circulation of the compressor unit can respectively detect the state of lubricating oil at three positions of the oil separator, the oil cooling outlet and the oil supply of the compressor, and the dilution degree and the viscosity of the oil are tested so as to judge whether the viscosity of the lubricating oil in the compressor unit meets the requirement of the compressor unit or not and avoid damage to the compressor caused by unsuitable viscosity of the lubricating oil. As the temperature and pressure range of the compressor unit is wider and wider, the combination and collocation of working medium, temperature and pressure and lubricating oil which have not been experienced before are often encountered in the actual design process. What the state, how diluted, how viscous the combination matches in the actual compressor package will directly determine whether the combination is viable.
A lubricant usage scheme without practical experience cannot be used directly on the unit product, otherwise the following hazards would exist: 1. the compressor is damaged due to improper viscosity of the lubricating oil; 2. the complete unit product pipeline is complicated, dead angles are many, the complete unit product pipeline is difficult to fully release after wrong lubricating oil is added, residual oil in equipment is much, and the lubricating oil is difficult to replace. In the existing detection method 1, an additional oil pipeline is directly arranged on the compressor equipment to guide lubricating oil in the unit into the equipment such as a detector for testing. Disadvantages: depending on the compressor installation, only the lubrication oil usage in the existing installation can be reflected. The combination of working medium, temperature and pressure and oil without experience cannot be tested in advance, and the basis cannot be provided for the design of the novel compressor unit. In the existing detection method 2, a pressure-resistant oil detection instrument is directly used, working medium and oil with specified weight are filled, the temperature and the pressure are regulated, and then the temperature and the pressure are read. Disadvantages: the device only has a single pressure tank, can only simulate the state of single oil and gas phases in oil, and cannot simulate the working conditions of pure liquid phase oil cooling and pure liquid phase oil pressurization at an oil pump outlet under the condition of isolating gas phase working media.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a system and a method for simulating and detecting the viscosity of lubricating oil of a compressor unit.
The technical scheme for solving the technical problems is as follows: a lubricating oil viscosity simulation detection system of a compressor unit comprises a proportional mixing tank, a working medium tank, an oil viscosity detector, an oil pump, a heater for heating the proportional mixing tank, a cooling mechanism for cooling the working medium tank and a scale for weighing the proportional mixing tank;
the proportional mixing tank is provided with a tank oil filling port, a processing port, a gas discharge port, a tank oil discharge port, an oil supply pump oil outlet, an oil supply viscosity oil outlet and a mixing tank gas phase equalizing port, and is provided with a mixing tank sight glass; the oil viscosity detector is provided with a detector oil filling port, a detector oil discharge port and a detector gas phase balance port;
the processing port is connected with the working medium tank through a first pipeline, a processing medium valve and a working medium tank valve are arranged on the first pipeline, the air release port is communicated with the first pipeline through an air release pipeline, and the air release pipeline is provided with an air release valve; the gas phase equalizing port of the mixing tank is connected with the gas phase equalizing port of the detector through a second pipeline, and the second pipeline is provided with a gas phase valve of the mixing tank and a gas phase valve of the detector;
the oil supply main pipeline is provided with a detector oil filling valve, the oil supply main pipeline is connected with an oil supply pump oil outlet through a first branch oil way, the oil pump is arranged on the first branch oil way, a control pipeline is connected in parallel on the oil pump, an oil pressure regulating valve is arranged on the control pipeline, the first branch oil way is also provided with an oil supply pump oil inlet valve and an oil supply pump oil outlet valve which are positioned on two sides of the oil pump, the oil supply main pipeline is connected with an oil supply viscosity oil outlet through a second branch oil way, the oil supply viscosity oil outlet valve is arranged on the second branch oil way, and the first branch oil way and the second branch oil way are connected in parallel.
The beneficial effects of the invention are as follows: the system can simulate the states of oil in three key positions of an oil separator, an oil cooling outlet and compressor oil supply in an oil way of the compressor unit, can judge the feasibility of combination of lubricating oil and working medium in advance, and avoids damage to the compressor caused by unsuitable viscosity of the lubricating oil in practical compressor unit equipment in the future; the whole simulation detection system is simple in structure, the whole oil way system of the compressor unit can be simulated at one time, and the scheme of using lubricating oil can be simulated when the compressor unit is designed, so that proper lubricating oil is found.
On the basis of the technical scheme, the invention can be improved as follows.
Further, a distributor for uniformly distributing working media is further arranged in the proportional mixing tank, a plurality of uniformly distributed holes are formed in the distributor, and the distributor is communicated with the processing port through a filling pipe.
The beneficial effect of adopting above-mentioned further scheme is, in working medium in the working medium jar enters into the proportion mixing tank through first pipeline by processing the working medium mouth, in order to make the working medium more abundant mixing with lubricating oil, so set up the distributor in the proportion mixing tank, the working medium that enters into the proportion mixing tank can more even all contact lubricating oil and with lubricating oil misce bene through intensive evenly distributed hole on the distributor.
Further, the vertical section of the distributor is of an isosceles triangle structure, the isosceles triangle structure comprises a bottom edge and two isosceles edges arranged on the bottom edge, and the uniform distribution holes are formed in the isosceles edges.
The technical scheme has the beneficial effects that the working medium is uniformly mixed with the lubricating oil in the proportional mixing tank after passing through a plurality of evenly distributed holes on the isosceles side.
Further, the cooling mechanism comprises a cooling container and a cooling medium arranged in the cooling container, and the working medium tank is arranged in the cooling medium.
The adoption of the further scheme has the beneficial effects that the working medium tank can float in the cooling medium, so that the requirement of cooling the working medium to the corresponding temperature can be met, and meanwhile, the working medium is prevented from being influenced by the cooling medium.
Further, a temperature sensor and a pressure sensor are also arranged on the proportional mixing tank.
The adoption of the further scheme has the beneficial effects that the power of the heater and the temperature of the cooling mechanism can be regulated according to the values of the temperature sensor and the pressure sensor so that the temperature in the proportional mixing tank can be increased to a required value, the working medium dissolved in lubricating oil is gasified, and the pressure in the proportional mixing tank can be increased
Further, the height of the proportional mixing tank is higher than the heights of the oil viscosity detector and the oil pump.
The oil mixing tank has the beneficial effects that when the oil viscosity detector and the oil pump are ready to be used, the oil in the proportional mixing tank can automatically fill the relevant pipeline by means of the height difference, and the pipeline does not need to be subjected to exhaust treatment.
Furthermore, the first pipeline, the second pipeline, the oil supply main pipeline, the first branch oil way and the second branch oil way all adopt pressure-resistant hoses.
The adoption of the further scheme has the beneficial effect that the weighing of the proportional mixing tank and the working medium tank is not influenced by a pipeline.
Further, a pipeline viewing mirror is arranged on the second pipeline.
The oil viscosity detector has the beneficial effects that the oil viscosity detector is filled with and does not contain gas when in use, working medium gas is prevented from being continuously dissolved into oil after the oil pump is started to boost pressure, a pipeline viewing mirror is arranged on the top second pipeline, and when oil can be seen through the pipeline viewing mirror, the oil viscosity detector is filled.
Further, a pressure gauge is arranged on the first pipeline.
The adoption of the further scheme has the beneficial effects that the pressure of the working medium tank can be directly displayed, and the heating condition of the working medium tank can be judged according to the pressure.
The simulation detection system uses a proportional mixing tank and a working medium tank, and is matched with an oil viscosity detector and a simple oil way, so that the oil way in the actual operation of the compressor unit can be simulated in advance, and oil state parameters are directly obtained and used for guiding design; the oil consumption scheme of the compressor unit can be obtained when the compressor unit is designed, and proper lubricating oil is found.
The invention relates to a method for simulating and detecting the viscosity of lubricating oil of a compressor unit, which adopts the system for simulating and detecting the viscosity of the lubricating oil of the compressor unit, and comprises the following steps:
1) Vacuumizing, weighing in a proportional mixing tank, and peeling and clearing by operating a scale;
2) Adding lubricating oil with the weight of A into a proportional mixing tank;
3) Working medium is added into the proportional mixing tank through the working medium tank, wherein the weight of the working medium is 0.2-0.5 times of that of the added lubricating oil, and the working medium enters the proportional mixing tank and is uniformly mixed with the lubricating oil in the proportional mixing tank;
4) Cutting off the communication between the proportional mixing tank and the working medium tank, and heating the proportional mixing tank by a heater, wherein the temperature in the proportional mixing tank is raised and boosted until the temperature reaches the oil content temperature of the compressor unit;
5) Opening se:Sub>A cooling mechanism, opening se:Sub>A relief valve and se:Sub>A working medium tank valve, regulating se:Sub>A heater to keep the oil temperature, regulating the cooling temperature of the cooling mechanism, gasifying and transferring the working medium in se:Sub>A proportional mixing tank back to the working medium tank, reducing the pressure in the proportional mixing tank, recording the weight of the lubricating oil and the working medium in the proportional mixing tank as C after the temperature and the pressure in the proportional mixing tank are stabilized in an oil state, obtaining the weight of the working medium in the proportional mixing tank as S=C-A through calculation, obtaining the volume of the lubricating oil according to the oil level of the lubricating oil in se:Sub>A mixing tank sight glass 23, subtracting the volume of the lubricating oil from the total volume of the proportional mixing tank 9 to obtain the gas phase volume V in the proportional mixing tank 9, obtaining the weight S1=ρV of the gas phase working medium according to the density ρ of the working medium under the temperature pressure, and obtaining the dilution degree of the lubricating oil as S2=S-S1 (S2+A) to obtain the dilution degree of the lubricating oil as S2/(S2+A) 100%;
6) Opening an oil inlet valve of an oil supply pump, an oil outlet valve of the oil supply pump, an oil filling valve of a detector, an oil viscosity outlet valve of the oil supply pump, a gas phase valve of a mixing tank and a gas phase valve of the detector, wherein lubricating oil in a proportional mixing tank is filled with an oil supply main pipeline, a first branch oil way, a second branch oil way and an oil viscosity detector under the action of gravity, the temperature of the oil viscosity detector maintains the temperature of the proportional mixing tank, and the oil viscosity measured by the oil viscosity detector is the oil viscosity in oil;
7) Closing an oil outlet valve of an oil supply pump, a gas phase valve of a mixing tank and a gas phase valve of a detector, slightly opening the oil supply viscosity oil outlet valve, and adjusting the temperature of the oil viscosity detector to ensure that the temperature of oil in the proportional mixing tank is the oil cooling outlet temperature, wherein the measured oil viscosity is the oil cooling outlet oil viscosity;
8) The oil viscosity detector maintains the temperature unchanged, the oil supply viscosity oil outlet valve is closed, the oil supply pump oil outlet valve is opened, the oil pressure regulating valve is fully opened, the oil pump is started, the oil pressure regulating valve is regulated according to the pressure of the oil viscosity detector so that the pressure reaches the oil supply pressure of the compressor, and the measured oil viscosity is the oil viscosity of the oil supply of the compressor.
The beneficial effects of the invention are as follows: the detection method can simulate the whole oil way system at one time, simulate the states of oil in three key positions of an oil separator, an oil cooling outlet and compressor oil supply in an oil way of a compressor unit, judge the feasibility of combination of lubricating oil and working medium in advance, and avoid damage to the compressor caused by unsuitable viscosity of the lubricating oil in practical compressor unit equipment in the future; the whole simulation detection system is simple in structure, the whole oil way system of the compressor unit can be simulated at one time, and the scheme of using lubricating oil can be simulated when the compressor unit is designed, so that proper lubricating oil types can be found.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a proportional mixing tank of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic diagram of a distributor according to the present invention;
FIG. 5 is a schematic left-hand view of FIG. 4;
in the figure, 1, a working substance valve; 2. a bleed valve; 3. a mixing tank filler valve; 4. a hose; 5. a working medium tank valve; 6. a pressure gauge; 7. a working medium tank; 8. a heater; 9. a proportional mixing tank; 91. a tank filler neck; 92. processing a working medium port; 93. a vent port; 94. an oil drain port of the tank; 95. an oil outlet of the oil feed pump; 96. an oil outlet for supplying oil and viscosity; 97. a gas phase equalizing port of the mixing tank; 98. a heater screw seat; 99. a temperature sensor screw seat; 10. an oil feed valve of the oil feed pump; 11. a balance; 12. a mixing tank oil drain valve; 13. an oil supply viscosity oil outlet valve; 14. an oil pressure regulating valve; 15. an oil pump; 16. an oil supply pump oil outlet valve; 17. a detector oil filling valve; 18. an oil discharge valve of the detector; 19. a detector gas phase valve; 20. an oil viscosity detector; 21. a conduit view mirror; 22. a mixing tank gas phase valve; 23. a mixing tank sight glass; 24. a distributor; 241. holes are uniformly distributed; 25. a temperature sensor; 26. a pressure sensor; 27. a filling pipe; 28. a first pipeline; 29. a bleed line; 30. a second pipeline; 31. an oil supply main pipe; 32. a first branch oil passage; 33. a second branch oil passage; 34. a control pipeline; 35. a cooling mechanism; 351. cooling the container; 352. and (3) a cooling medium.
Detailed Description
The principles and features of the present invention are described below in connection with examples, which are set forth only to illustrate the present invention and not to limit the scope of the invention.
As shown in fig. 1 to 5, a system for simulating and detecting the viscosity of lubricating oil of a compressor unit comprises a proportional mixing tank 9, a working medium tank 7, an oil viscosity detector 20, an oil pump 15, a heater 8 for heating the proportional mixing tank 9, a cooling mechanism 35 for cooling the working medium tank 7, and a scale 11 for weighing the proportional mixing tank 9 and the working medium tank 7;
the proportional mixing tank 9 is provided with a tank oil filling port 91, a processing port 92, a gas discharge port 93, a tank oil discharge port 94, an oil supply pump oil outlet 95, an oil supply viscosity oil outlet 96 and a mixing tank gas phase pressure equalizing port 97, and the proportional mixing tank 9 is provided with a mixing tank sight glass 23; the oil viscosity detector 20 is provided with a detector oil filling port, a detector oil discharge port and a detector gas phase balance port;
the processing port 92 is connected with the working medium tank 7 through a first pipeline 28, the first pipeline 28 is provided with a processing medium valve 1 and a working medium tank valve 5, the air release port 93 is communicated with the first pipeline 28 through an air release pipeline 29, and the air release pipeline 29 is provided with an air release valve 2; the mixing tank gas phase equalizing port 97 is connected with the detector gas phase equalizing port through a second pipeline 30, and the second pipeline 30 is provided with a mixing tank gas phase valve 22 and a detector gas phase valve 19;
the detector oil filler is characterized in that an oil supply main pipeline 31 is connected to the detector oil filler, an oil supply main pipeline 31 is provided with a detector oil filler valve 17, the oil supply main pipeline 31 is connected with an oil supply pump oil outlet 95 through a first branch oil way 32, an oil pump 15 is arranged on the first branch oil way 32, a control pipeline 34 is connected in parallel to the oil pump 15, an oil pressure regulating valve 14 is arranged on the control pipeline 34, an oil supply pump oil inlet valve 10 and an oil supply pump oil outlet valve 16 which are positioned on two sides of the oil pump 15 are further arranged on the first branch oil way 32, the oil supply main pipeline 31 is connected with an oil supply viscosity oil outlet 96 through a second branch oil way 33, and an oil supply viscosity oil outlet valve 13 is arranged on the second branch oil way 33, and the first branch oil way 32 and the second branch oil way 33 are arranged in parallel.
The proportional mixing tank 9 is also internally provided with a distributor 24 for uniformly distributing working media, the distributor 24 is provided with a plurality of uniform distribution holes 241, and the distributor 24 is communicated with the processing port 92 through a filling pipe 27. The working medium in the working medium tank 7 enters the proportional mixing tank 9 through the first pipeline 28 from the working medium processing port 92, so that the working medium can be fully mixed with the lubricating oil, the distributor 24 is arranged in the proportional mixing tank 9, and the working medium entering the proportional mixing tank 9 can be uniformly contacted with the lubricating oil and uniformly mixed with the lubricating oil through the dense uniform distribution holes 241 on the distributor 24.
The vertical section of the distributor 24 is an isosceles triangle structure, the isosceles triangle structure comprises a bottom edge and two isosceles edges arranged on the bottom edge, and the uniform distribution holes 241 are arranged on the isosceles edges. The working medium is uniformly mixed with the lubricating oil in the proportional mixing tank 9 after passing through a plurality of uniform distribution holes 241 on the isosceles side.
The cooling mechanism 35 comprises a cooling container 351 and a cooling medium 352 arranged in the cooling container 351, and the working medium tank 7 is arranged in the cooling medium 352. The working medium tank 7 can float in the cooling medium 352, so that the requirement of cooling the working medium to the corresponding temperature can be met, and the cooling medium 352 is prevented from influencing the working medium.
The heater 8 can be electrically heated, and the heater 8 is mounted on the proportional mixing tank 9 through a heater screw seat 98.
The temperature sensor 25 is mounted on the proportioning tank 9 by a temperature sensor screw seat 99.
The proportional mixing tank 9 is also provided with a temperature sensor 25 and a pressure sensor 26. The power of the heater 8 and the temperature of the cooling mechanism 35 can be adjusted according to the values of the temperature sensor 25 and the pressure sensor 26 so that the temperature in the proportional mixing tank 9 can be increased to a required value, the working medium dissolved in the lubricating oil can be gasified, and the pressure in the proportional mixing tank 9 can be increased
The height of the proportional mixing tank 9 is higher than the heights of the oil viscosity detector 20 and the oil pump 15. When the oil viscosity detector 20 and the oil pump 15 are ready to be used, the lubricating oil of the proportional mixing tank 9 can automatically fill the relevant pipeline by means of the height difference, and exhaust treatment of the pipeline is not required.
The first pipeline 28, the second pipeline 30, the main oil supply pipeline 31, the first branch oil way 32 and the second branch oil way 33 all adopt pressure hoses 4, so that weighing of the proportional mixing tank 9 and the working medium tank 7 is not affected by the pipelines.
The second pipeline 30 is provided with a pipeline mirror 21. The oil viscosity detector 20 should be filled with or not with gas when in use, so as to avoid the working medium gas from continuously dissolving into the lubricating oil after the oil pump 15 is started to boost pressure, and the pipeline sight glass 21 is arranged on the second pipeline 30 at the top, so that the oil viscosity detector 20 is filled with the lubricating oil when the lubricating oil can be seen through the pipeline sight glass 21.
The first pipeline 28 is provided with a pressure gauge 6. The pressure of the working medium tank 7 can be directly displayed, and the heating condition of the working medium tank 7 can be judged according to the pressure.
The tank oil filler 91 is provided with a mixing tank oil filler valve 3, the tank oil drain 94 is provided with a mixing tank oil drain valve 12, and the detector oil drain is provided with a detector oil drain valve 18.
The invention relates to a method for simulating and detecting the viscosity of lubricating oil of a compressor unit, which adopts the system for simulating and detecting the viscosity of the lubricating oil of the compressor unit, and comprises the following steps:
1) Vacuumizing the simulation detection system, weighing the proportional mixing tank 9, and peeling and clearing the scale 11;
2) Adding the lubricating oil with the required weight A to a proportional mixing tank 9 through a mixing tank oil adding valve 3;
3) Working medium is added into the proportional mixing tank 9 through the working medium tank 7, wherein the weight of the working medium is 0.2-0.5 times of that of the added lubricating oil, and the working medium enters the proportional mixing tank 9 and is uniformly mixed with the lubricating oil in the proportional mixing tank 9;
4) Cutting off the communication between the working medium tank 7 and the proportional mixing tank 9, starting the heater 8 to heat the proportional mixing tank 9, and heating and boosting the temperature in the proportional mixing tank 9 until the temperature reaches the temperature of the compressor unit oil separator;
5) Opening se:Sub>A cooling mechanism 35, se:Sub>A deflation valve 2 and se:Sub>A working medium tank valve 5, regulating se:Sub>A heater 8 to keep the oil temperature, regulating the cooling temperature of the cooling mechanism 35, gasifying working medium in se:Sub>A proportional mixing tank 9 under the action of the heater 8, increasing the pressure in the proportional mixing tank 9, cooling the working medium tank 7 under the action of the cooling mechanism 35, enabling the pressure in the working medium tank 7 to be lower than the pressure in the proportional mixing tank 9, liquefying gas in the proportional mixing tank 9 through se:Sub>A deflation port 93 and se:Sub>A first pipeline 28 into the working medium tank 7, reducing the pressure in the proportional mixing tank 9, enabling the proportional mixing tank 9 to be in se:Sub>A target overheat state, namely an oil separator state, until the pressure in the proportional mixing tank 9 is stabilized to the pressure in se:Sub>A compressor unit oil separator, recording the weight of the lubricating oil in the proportional mixing tank 9 and the working medium at the moment as C, obtaining the weight of the working medium in the proportional mixing tank 9 at the moment as S=C-A, obtaining the volume of the working medium which comprises the working medium dissolved into the lubricating oil and the working medium in se:Sub>A cavity at the upper part of the proportional mixing tank 9, obtaining the volume of the proportional mixing tank 9 according to the height of the lubricating oil in se:Sub>A mixing tank 23, then obtaining the volume of the mixed lubricating oil in the proportional mixing tank 9 by subtracting the volume of the working medium as S=2, and obtaining the volume of the mixed oil in the mixed phase at the volume ratio of the volume of the mixed tank 2 S=S=2 by subtracting the volume of the working medium from the volume of the working medium as 2 from the volume in the volume S=2 at the volume of the working medium in the volume S=2;
6) Opening an oil feed pump oil inlet valve 10, an oil feed pump oil outlet valve 16, a detector oil filling valve 17, an oil feed viscosity oil outlet valve 13, a mixing tank gas phase valve 22 and a detector gas phase valve 19, filling lubricating oil in a proportion mixing tank 9 into an oil feed main pipeline 31, a first branch oil way 32, a second branch oil way 33 and an oil viscosity detector 20 under the action of gravity, and maintaining the temperature of the oil viscosity detector 20 at the temperature of the proportion mixing tank 9, wherein the oil viscosity measured by the oil viscosity detector 20 is the oil viscosity in an oil separator;
7) Closing the oil outlet valve 16 of the oil supply pump, the gas phase valve 22 of the mixing tank and the gas phase valve 19 of the detector, slightly opening the oil supply viscosity oil outlet valve 13, and adjusting the temperature of the oil viscosity detector 20 to ensure that the temperature of the oil in the proportional mixing tank 9 is the oil cooling outlet temperature, wherein the measured oil viscosity is the oil cooling outlet oil viscosity;
8) The oil viscosity detector 20 maintains the temperature unchanged, the oil supply viscosity oil outlet valve 13 is closed, the oil supply pump oil outlet valve 16 is opened, the oil pressure regulating valve 14 is fully opened, the oil pump 15 is opened, the oil pressure regulating valve 14 is regulated according to the pressure of the oil viscosity detector 20 so that the pressure reaches the oil supply pressure of the compressor, and the measured oil viscosity is the oil viscosity of the oil supply of the compressor.
When the proportional mixing tank 9 is filled with lubricating oil, the oil level of the lubricating oil in the mixing tank can be observed through the mixing tank sight glass 23, and the lubricating oil is weighed in real time so that the weight of the lubricating oil in the proportional mixing tank 9 meets the requirement of a target value.
The mixing tank sight glass 23 is provided with an oil level scale. Different oil level gauges on the mixing tank sight glass 23 correspond to different volumes of lubricating oil.
The working medium tank 7 is preloaded with working medium of required weight. Working substance can be processed into the proportional mixing tank 9 by inverting the working substance tank 7. The heater 8 may be electrically heated.
Simulating the actual use state of lubricating oil in a compressor unit, opening an oil feed pump oil inlet valve 10, an oil feed pump oil outlet valve 16, a detector gas phase valve 19 and a mixing tank gas phase valve 22 in the steps 6) and 7), putting liquid phase oil into a pipeline and an oil viscosity detector 20, leaving a gas phase working medium in a proportional mixing tank, closing the oil feed pump oil outlet valve 16, the detector gas phase valve 19 and the mixing tank gas phase valve 22, isolating oil in the oil viscosity detector 20 from the gas phase working medium, and avoiding further dissolution of the gas phase working medium caused by temperature and pressure change in the subsequent test process; the density of the oil in the oil viscosity detector 20 can change in the cooling process, and in order to stabilize the pressure, the oil supply viscosity oil outlet valve 13 is slightly opened, so that the pressure of the oil in the oil viscosity detector 20 and the oil in the proportional mixing tank 9 can be balanced at a target value, the oil supply viscosity oil outlet valve 13 is slightly opened, the flow of the oil is reduced as much as possible, and the interference temperature is avoided.
The invention can simulate the whole oil way system at one time, the pressure is unchanged and the temperature is reduced in the state of the compressor unit in oil cooling; the temperature is constant and the pressure increases when the oil pump 15 is in an oil-out state. At this time, the oil and gas phase working medium are separated from contact, and extra working medium is not dissolved into lubricating oil in the temperature reduction process due to temperature reduction and pressure rise, so that the dilution degree of the oil is changed. The invention uses a proportion mixing tank 9 and a working medium tank 7, and is matched with an oil viscosity detector 20 and a simple oil way, so that the oil way in the actual running process of the compressor unit can be simulated in advance, and oil state parameters can be directly obtained for guiding design; the oil consumption scheme of the compressor unit can be obtained when the compressor unit is designed, and proper lubricating oil is found.
The compressor set is condensed at 75 ℃ and evaporated at 40 ℃, the working condition selects refrigerant R152A as working medium, the exhaust temperature of the compressor and the oil supply temperature of lubricating oil are confirmed according to the working condition and the model of the compressor, and the working condition of the compressor set can be simulated by the simulation test system and the simulation test method so as to select proper lubricating oil.
Case: working medium refrigerant R152A, compressor oil separator pressure 21.12barA, temperature 91.4 ℃, oil cooling outlet temperature 70.2 ℃, compressor oil supply pressure 23.92barA, temperature 70.2 ℃.
The oil separator pressure target value of the actual compressor unit is 21barA, the target temperature is 90-92 ℃, the oil cooling outlet target temperature is 70+/-2 ℃, the oil supply target pressure range of the compressor is 1.5-3bar higher than the oil separator pressure, and the target temperature is 70+/-2 ℃. The dilution of oil in the oil separator and working medium is measured through the system, and the viscosity under the oil supply condition is required to be not lower than 10cst.
Aiming at the conditions, great wall 4513-220 lubricating oil is selected for viscosity detection.
Adopting a simulation detection system to carry out a detection process, vacuumizing the system, weighing the proportional mixing tank 9, peeling and zeroing; adding the lubricating oil with required weight from the mixing tank filling valve 3 to the top position of the mixing tank sight glass 23, weighing 20kg of the lubricating oil by a scale, opening the working medium tank valve 5 and the working medium valve 1 to process about 10kg of the working medium, and controlling the quantity of the processed quality according to the weight difference value of the readings of the scale 11; the heater 8 is started to stabilize the temperature of the proportional mixing tank 9 at 90-92 ℃, the cooling mechanism 35 is started, the temperature of the cooling medium 352 is 75 ℃, the temperature is the corresponding saturation temperature of the working medium R152A at 21barA, the working medium tank 7 is arranged in the cooling medium 352, the pressure of the proportional mixing tank 9 is stabilized at 21barA, the weight 27.52kg of the proportional mixing tank 9, namely the total weight of the lubricating oil and the working medium in the proportional mixing tank 9, is recorded after the temperature and the pressure are stabilized, the total weight of the lubricating oil and the working medium in the proportional mixing tank 9 is compared with the added lubricating oil amount to obtain the mass 27.52-20=7.52 kg of the working medium in the proportional mixing tank 9, the volume of the lubricating oil in the proportional mixing tank 9 is obtained according to the height of the oil level in the mixing tank sight glass 23, and the total volume of the proportional mixing tank 9 is subtractedThe volume of the lubricating oil, the gas phase volume 33L in the proportional mixing tank 9, and the density of the working medium R152A at the temperature and the pressure is 61kg/m 3 The weight of the gas phase working medium is about 2kg, 7.52-2=5.52 kg, and the rest 5.52kg is the mass of the diluted working medium in the lubricating oil, so that the dilution degree of the lubricating oil is 5.52/(5.52+20) ×100% =21.6%; the subsequent operation according to operation steps 6), 7) and 8) is sequentially carried out, the oil viscosity of each point is 5.8cst, the oil cooling outlet viscosity is 11.2cst, the oil viscosity is lower than the oil supply viscosity, the oil cooling outlet viscosity is equivalent to the oil supply viscosity, particularly the viscosity under the oil supply condition, and the oil supply viscosity is more than 10cst, so that the oil supply viscosity is suitable lubricating oil and can meet the requirements of the working conditions of the compressor unit.
TABLE 1
Aiming at the conditions, the viscosity detection is carried out by selecting the lubricating oil of the Zhongkerun PAG-220.
Adopting a simulation detection system to carry out a detection process, vacuumizing the system, weighing the proportional mixing tank 9, peeling and zeroing; filling oil from the mixing tank oil filling valve 3 to the top position of the mixing tank sight glass 23 in the proportional mixing tank 9, weighing 20kg of lubricating oil by the scale 11, opening the working medium tank valve 5 and the working medium valve 1 to process about 10kg of working medium, and controlling the quantity of the processed quality according to the weight difference value of the readings of the scale 11; the heater 8 is started to stabilize the temperature of the proportional mixing tank 9 at 90-92 ℃, the cooling mechanism 35 is started, the temperature of the cooling medium 352 is 75 ℃, the temperature is the corresponding saturated temperature of the working medium R152A at 21barA, the working medium tank 7 is arranged in the cooling medium 352, the pressure of the proportional mixing tank 9 is stabilized at 21barA, the weight 27.97kg of the proportional mixing tank 9, namely the total weight of the lubricating oil and the working medium in the proportional mixing tank 9, is recorded after the temperature and the pressure are stabilized, the mass of the working medium in the proportional mixing tank 9 is 27.97-20=7.97 kg after the comparison with the added lubricating oil, the volume of the lubricating oil in the proportional mixing tank 9 is obtained according to the height of the oil level in the mixing tank sight glass 23, the volume of the lubricating oil is subtracted from the total volume of the proportional mixing tank 9, the gas phase volume 33L in the proportional mixing tank 9 is obtained, and the working medium R152A is checked under the temperature and the pressureDensity of 61kg/m 3 The weight of the gas phase working medium is about 2kg, 7.97-2=5.97 kg, the rest 5.97kg is the mass of the diluted working medium in the lubricating oil, and the dilution degree of the lubricating oil is 5.97/(5.97+20) ×100% =23%; sequentially operating according to the operation steps 6), 7) and 8), wherein the oil viscosity of each point is 5.6cst, the oil cooling outlet viscosity is 9.2cst, the oil viscosity is lower than the oil supply viscosity, the oil cooling outlet viscosity is lower than 10cst, particularly the viscosity under the oil supply condition, the oil supply viscosity is less than 10cst, the requirement of the working condition of the compressor unit cannot be met, and the oil is replaced again for oil selection.
TABLE 2
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The lubricating oil viscosity simulation detection system of the compressor unit is characterized by comprising a proportional mixing tank (9), a working medium tank (7), an oil viscosity detector (20), an oil pump (15), a heater (8) for heating the proportional mixing tank (9), a cooling mechanism (35) for cooling the working medium tank (7) and a scale (11) for weighing the proportional mixing tank (9);
the proportional mixing tank (9) is provided with a tank oil filling port (91), a processing port (92), a gas discharging port (93), a tank oil discharging port (94), an oil supply pump oil outlet (95), an oil supply viscosity oil outlet (96) and a mixing tank gas phase pressure equalizing port (97), and the proportional mixing tank (9) is provided with a mixing tank sight glass (23); the oil viscosity detector (20) is provided with a detector oil filling port, a detector oil discharge port and a detector gas phase balance port;
the processing port (92) is connected with the working medium tank (7) through a first pipeline (28), a processing medium valve (1) and a working medium tank valve (5) are arranged on the first pipeline (28), the air release port (93) is communicated with the first pipeline (28) through an air release pipeline (29), and an air release valve (2) is arranged on the air release pipeline (29); the mixing tank gas phase equalizing port (97) is connected with the detector gas phase equalizing port through a second pipeline (30), and a mixing tank gas phase valve (22) and a detector gas phase valve (19) are arranged on the second pipeline (30);
the oil supply main pipeline (31) is connected to the detector oil filling port, the detector oil filling valve (17) is arranged on the oil supply main pipeline (31), the oil supply main pipeline (31) is connected with the oil supply pump oil outlet (95) through a first branch oil way (32), the oil pump (15) is arranged on the first branch oil way (32), a control pipeline (34) is connected in parallel on the oil pump (15), an oil pressure regulating valve (14) is arranged on the control pipeline (34), an oil supply pump oil inlet valve (10) and an oil supply pump oil outlet valve (16) which are arranged on two sides of the oil pump (15) are further arranged on the first branch oil way (32), the oil supply main pipeline (31) is connected with the viscosity of the oil supply oil outlet (96) through a second branch oil way (33), and the oil supply outlet valve (13) is arranged on the second branch oil way (33) in parallel.
2. The lubricating oil viscosity simulation detection system of the compressor unit according to claim 1, wherein a distributor (24) for uniformly distributing working media is further arranged in the proportional mixing tank (9), a plurality of uniform distribution holes (241) are formed in the distributor (24), and the distributor (24) is communicated with the processing port (92) through a filling pipe (27).
3. The lubrication oil viscosity simulation detection system of a compressor unit according to claim 2, wherein the vertical section of the distributor (24) is an isosceles triangle structure, the isosceles triangle structure comprises a bottom side and two isosceles sides arranged on the bottom side, and the uniform distribution holes (241) are arranged on the isosceles sides.
4. The system according to claim 1, wherein the cooling mechanism (35) includes a cooling container (351) and a cooling medium (352) disposed in the cooling container (351), and the working medium tank (7) is disposed in the cooling medium (352).
5. The system for simulating the viscosity of lubricating oil of a compressor unit according to claim 1, wherein the proportional mixing tank (9) is further provided with a temperature sensor (25) and a pressure sensor (26).
6. The system according to claim 1, characterized in that the height of the proportional mixing tank (9) is higher than the heights of the oil viscosity detector (20) and the oil pump (15).
7. The system according to claim 1, wherein the first pipeline (28), the second pipeline (30), the main oil supply pipeline (31), the first branch oil passage (32) and the second branch oil passage (33) are all pressure-resistant hoses (4).
8. The system according to claim 1, wherein the second pipeline (30) is provided with a pipeline mirror (21).
9. The system according to claim 1, characterized in that the first pipeline (28) is provided with a pressure gauge (6).
10. A method for simulating and detecting the viscosity of lubricating oil of a compressor unit, characterized in that the method comprises the following steps of:
1) Vacuumizing, weighing a proportional mixing tank (9), and peeling and clearing by operating a scale (11);
2) Adding lubricating oil with the weight of A to a proportional mixing tank (9);
3) Working medium is added into the proportional mixing tank (9) through the working medium tank (7), wherein the weight of the working medium is 0.2-0.5 times of that of the added lubricating oil, and the working medium enters the proportional mixing tank (9) and is uniformly mixed with the lubricating oil in the proportional mixing tank (9);
4) Cutting off the communication between the proportional mixing tank (9) and the working medium tank (7), and heating the proportional mixing tank (9) by the heater (8), and raising the temperature and the pressure in the proportional mixing tank (9) until the temperature reaches the oil content temperature of the compressor unit;
5) Opening se:Sub>A cooling mechanism (35), opening se:Sub>A relief valve (2) and se:Sub>A working medium tank valve (5), regulating se:Sub>A heater (8) to keep the oil temperature, regulating the cooling temperature of the cooling mechanism (35), gasifying and transferring the working medium in se:Sub>A proportional mixing tank (9) back to se:Sub>A working medium tank (7), reducing the pressure in the proportional mixing tank (9), recording the weight of the lubricating oil and the working medium in the proportional mixing tank (9) at the moment as C after the temperature and the pressure in the proportional mixing tank (9) are stabilized in an oil state, obtaining the weight of the working medium in the proportional mixing tank (9) at the moment as S=C-A through calculation, obtaining the volume of the lubricating oil according to the oil level height of the lubricating oil in se:Sub>A mixing tank sight glass (23), calculating the gas phase volume V in the proportional mixing tank (9) by subtracting the volume of the lubricating oil, obtaining the gas phase weight S1=ρV according to the density ρ of the working medium at the temperature and the pressure, and obtaining the diluted working medium weight as S2=S-S1 in the lubricating oil, and obtaining the degree of the lubricating oil as S2/(S2+A) ×100%;
6) Opening an oil feeding pump oil inlet valve (10), an oil feeding pump oil outlet valve (16), a detector oil filling valve (17), an oil feeding viscosity oil outlet valve (13), a mixing tank gas phase valve (22) and a detector gas phase valve (19), wherein lubricating oil in a proportional mixing tank (9) is filled with an oil feeding main pipeline (31), a first branch oil way (32), a second branch oil way (33) and an oil viscosity detector (20) under the action of gravity, the temperature of the oil viscosity detector (20) maintains the temperature of the proportional mixing tank (9), and the oil viscosity measured by the oil viscosity detector (20) is the oil viscosity in the oil;
7) Closing an oil supply pump oil outlet valve (16), a mixing tank gas phase valve (22) and a detector gas phase valve (19), slightly opening an oil supply viscosity oil outlet valve (13), and adjusting the temperature of an oil viscosity detector (20) to ensure that the temperature of oil in the proportional mixing tank (9) is the oil cooling outlet temperature, wherein the measured oil viscosity is the oil cooling outlet oil viscosity;
8) The oil viscosity detector (20) maintains the temperature unchanged, the oil supply viscosity oil outlet valve (13) is closed, the oil supply pump oil outlet valve (16) is opened, the oil pressure regulating valve (14) is fully opened, the oil pump (15) is opened, the oil pressure regulating valve (14) is regulated according to the pressure of the oil viscosity detector (20) so that the pressure reaches the oil supply pressure of the compressor, and the measured oil viscosity is the oil viscosity of the oil supply of the compressor.
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Inventor after: Mao Guoliang Inventor after: Zhou Zipeng Inventor after: Hou Liyan Inventor after: Zhao Rui Inventor after: Jiang Wei Inventor after: Li Zengqun Inventor after: Zhao Baoguo Inventor after: Miao Huijun Inventor after: Fan Changhao Inventor after: Zhang Yang Inventor after: Li Chengxin Inventor before: Mao Guoliang Inventor before: Zhou Zipeng Inventor before: Hou Liyan Inventor before: Zhao Rui Inventor before: Jiang Wei Inventor before: Li Zengqun Inventor before: Zhao Baoguo Inventor before: Gou Huijun Inventor before: Fan Changhao Inventor before: Zhang Yang Inventor before: Li Chengxin |