CN115355155A - Lubricating oil temperature variable frequency control method for vacuum pump - Google Patents
Lubricating oil temperature variable frequency control method for vacuum pump Download PDFInfo
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- CN115355155A CN115355155A CN202211123882.1A CN202211123882A CN115355155A CN 115355155 A CN115355155 A CN 115355155A CN 202211123882 A CN202211123882 A CN 202211123882A CN 115355155 A CN115355155 A CN 115355155A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 24
- 239000003921 oil Substances 0.000 claims abstract description 262
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims description 153
- 239000007924 injection Substances 0.000 claims description 153
- 230000000694 effects Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 15
- 238000000926 separation method Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- 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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
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- 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
- F04B39/02—Lubrication
- F04B39/0207—Lubrication with lubrication control systems
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- 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
- F04B39/02—Lubrication
- F04B39/0284—Constructional details, e.g. reservoirs in the casing
-
- 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
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- 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
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of vacuum pumps, and particularly discloses a lubricating oil temperature variable frequency control method for a vacuum pump, which comprises the following steps: collecting oil temperature: acquiring oil temperature data in real time; and (3) oil temperature judgment: judging whether the oil temperature data is in a set temperature range; if the oil temperature data is lower than the set temperature range, a speed reduction command is generated, and if the oil temperature data is higher than the set temperature range, a speed increase command is generated; controlling a fan: and controlling the fan to reduce the rotating speed according to the speed reduction instruction, and controlling the fan to increase the rotating speed according to the speed increase instruction. By adopting the technical scheme of the invention, the vacuum pump can be ensured to be in the optimal running state.
Description
Technical Field
The invention relates to the technical field of vacuum pumps, in particular to a lubricating oil temperature variable frequency control method of a vacuum pump.
Background
The vacuum pump is widely applied to the fields of electronics, printing and paper making, chemical and medical engineering, food processing and packaging, material treatment and the like, and is used for vacuumizing a pumped container. In the operation process of the vacuum pump, lubricating oil in a bearing box of the vacuum pump can be heated gradually, the cooling and heat dissipation effects are poor because the existing lubricating oil of the vacuum pump is in a closed space, and the service life of the vacuum pump is directly influenced if the oil temperature of the lubricating oil is too high due to the fact that the operating time of the vacuum pump is too long. In order to delay the service life of the vacuum pump, a limit value is currently set, for example, above the oil temperature limit, an automatic shutdown alarm is given. However, whether the vacuum pump is in the optimal operation state needs to be judged by the patrol of engineers, and timely adjustment is difficult to achieve.
Therefore, a variable frequency control method for the temperature of the lubricating oil of the vacuum pump, which can be adjusted in time and ensure that the vacuum pump is in the optimal running state, is needed.
Disclosure of Invention
The invention provides a variable frequency control method for the temperature of lubricating oil of a vacuum pump, which can ensure that the vacuum pump is in an optimal running state.
In order to solve the technical problem, the present application provides the following technical solutions:
the variable frequency control method for the temperature of the lubricating oil of the vacuum pump comprises the following steps:
collecting oil temperature: acquiring oil temperature data in real time;
oil temperature judgment: judging whether the oil temperature data is in a set temperature range; if the oil temperature data are lower than the set temperature range, a speed reduction command is generated, and if the oil temperature data are higher than the set temperature range, a speed increase command is generated;
controlling a fan: and controlling the fan to reduce the rotating speed according to the speed reduction instruction, and controlling the fan to increase the rotating speed according to the speed increase instruction.
The basic scheme principle and the beneficial effects are as follows:
according to the scheme, the oil temperature data are collected in real time, whether the oil temperature data are in the set temperature range or not is judged, and if the oil temperature data are not in the set temperature range, the fan is controlled, so that the heat dissipation of the vacuum pump is controlled, the aim of dynamic adjustment is achieved, and the oil temperature returns to the set temperature range. In conclusion, the vacuum pump can be self-corrected in real time and is in the optimal state interval through the scheme, so that the power consumption is reduced, and the service life of the vacuum pump is prolonged.
Further, still include:
oil pressure collection: acquiring oil pressure data in real time;
oil pressure judgment: judging whether the oil pressure data is in a set oil pressure range; if the oil pressure data is lower than the set oil pressure range, generating a pressure increasing command, and if the oil pressure data is higher than the set oil pressure range, generating a pressure reducing command;
oil pump control: and controlling the oil pump to reduce the rotating speed according to the pressure reduction instruction, and controlling the oil pump to increase the rotating speed according to the pressure increase instruction.
With this preferred embodiment, the oil pressure can be set within the optimum range, that is, within the set oil pressure range, and the vacuum pump can be set in the optimum state range.
Further, in the oil temperature acquisition step, the oil temperature data includes oil injection temperature data and exhaust temperature data;
in the oil temperature judgment, the set temperature range comprises an oil injection temperature range and an exhaust temperature range; judging whether the oil injection temperature data is in the oil injection temperature range and/or judging whether the exhaust temperature data is in the exhaust temperature range;
and if the oil injection temperature data is lower than the oil injection temperature range or the exhaust temperature data is lower than the exhaust temperature range, generating a speed increasing instruction, and if the oil injection temperature data is higher than the oil injection temperature range or the exhaust temperature data is higher than the exhaust temperature range, generating the speed increasing instruction.
The oil injection temperature is the basis for direct judgment, and the exhaust temperature is the basis for indirect judgment. The conditions can be carried out by a single oil injection temperature, and the regulation can be carried out by a single exhaust temperature; the two types of data can be combined for adjustment, adjustment failure caused by failure of one type of data sensor can be avoided, and the two types of data can be combined for adjustment to improve adjustment precision.
Further, in the oil pressure acquisition step, the oil pressure data includes oil injection quantity data and oil injection pressure data;
in the oil pressure judging step, the set oil pressure range comprises an oil injection quantity range and an oil injection pressure range; judging whether the oil injection quantity data is in the oil injection quantity range and/or judging whether the oil injection pressure data is in the oil injection pressure range;
if the oil injection quantity data is lower than the oil injection quantity range or the oil injection pressure data is lower than the oil injection pressure range, a pressure increasing instruction is generated, and if the oil injection quantity data is higher than the oil injection quantity range or the oil injection pressure data is higher than the oil injection pressure range, a pressure reducing instruction is generated.
The oil injection quantity is the basis of direct judgment, and the oil injection pressure is the basis of indirect judgment. When the fuel injection quantity and the fuel injection pressure are combined for adjustment, the adjustment failure caused by the failure of the sensor of one type of data can be avoided, the reliability is ensured, and the adjustment accuracy can be improved by combining the two types of data.
Further, in the fan control step, the larger the difference value between the oil temperature data and the set temperature range is, the larger the adjustment on the rotating speed of the fan is;
in the oil pump control step, the adjustment of the rotation speed of the oil pump is increased as the difference between the oil pressure data and the set oil pressure range is increased.
Further, still include:
instruction cooperation: and executing the fan control step and the oil pump control step according to the preset priority.
Further, in the instruction coordination step, the priority executed in the oil pump control step is higher than that executed in the fan control step.
The oil pressure can be preferentially ensured to be in the optimal state section.
Further, in the oil temperature judging step, whether the oil injection temperature data is higher than an oil injection temperature warning value or not is judged, whether the exhaust temperature data is higher than an exhaust temperature warning value or not is judged, and if the oil injection temperature data is higher than the oil injection temperature warning value or the exhaust temperature data is higher than the exhaust temperature warning value, alarm information is generated;
in the oil pressure judging step, whether the oil injection quantity data is higher than the oil injection quantity warning value or not and whether the oil injection pressure data is higher than the oil injection pressure warning value or not are also judged, and if the oil injection quantity data is higher than the oil injection quantity warning value and the oil injection pressure data is higher than the oil injection pressure warning value, alarm information is generated.
In the preferred scheme, by setting the warning value, the alarm is given in time after the data is higher than the warning value, so that the staff can be reminded to intervene in time to check the running condition.
Further, the method also comprises an effect monitoring step: and after the speed increasing instruction is generated, judging whether the oil injection temperature data is recovered to the oil injection temperature range within the preset time, and if the oil injection temperature data exceeds the preset time, generating alarm information.
When the preset time is exceeded, the abnormity of dynamic regulation and control can be caused, and the working personnel can be reminded to intervene in time and check the running condition by generating alarm information.
Drawings
Fig. 1 is a schematic diagram of a variable frequency control method for lubricating oil temperature of a vacuum pump according to an embodiment.
Detailed Description
The following is further detailed by way of specific embodiments:
example one
As shown in fig. 1, the method for controlling the lubricating oil temperature of the vacuum pump by frequency conversion in the embodiment includes the following steps:
collecting oil temperature: acquiring oil temperature data in real time; the oil temperature data comprises oil injection temperature data and exhaust temperature data;
oil temperature judgment: judging whether the oil temperature data is in a set temperature range or not; if the oil temperature data are lower than the set temperature range, a speed reduction command is generated, and if the oil temperature data are higher than the set temperature range, a speed increase command is generated; specifically, the set temperature range includes an oil injection temperature range and an exhaust temperature range; the range of the oil injection temperature is determined according to the viscosity of the lubricating oil, and in the embodiment, the range of the oil injection temperature is 70-75 ℃, and the range of the exhaust temperature is 98-100 ℃. Judging whether the oil injection temperature data is in the oil injection temperature range and/or judging whether the exhaust temperature data is in the exhaust temperature range; and if the oil injection temperature data is lower than the oil injection temperature range or the exhaust temperature data is lower than the exhaust temperature range, generating a speed increasing instruction, and if the oil injection temperature data is higher than the oil injection temperature range or the exhaust temperature data is higher than the exhaust temperature range, generating the speed increasing instruction. The oil injection temperature is the basis for direct judgment, and the exhaust temperature is the basis for indirect judgment. In the present embodiment, the fuel injection temperature and the exhaust gas temperature are adjusted simultaneously, i.e., whether the fuel injection temperature data is within the fuel injection temperature range and whether the exhaust gas temperature data is within the exhaust gas temperature range are determined.
Oil pressure collection: acquiring oil pressure data in real time; the oil pressure data comprises oil injection quantity data and oil injection pressure data;
oil pressure judgment: judging whether the oil pressure data is in a set oil pressure range; if the oil pressure data is lower than the set oil pressure range, generating a pressure increasing command, and if the oil pressure data is higher than the set oil pressure range, generating a pressure reducing command; specifically, the set oil pressure range includes an oil injection amount range and an oil injection pressure range; the range of the oil injection pressure and the range of the oil injection quantity are determined according to the overall thermal power and the overall pipe diameter of the vacuum pump, for example, the overall thermal power of the vacuum pump is 37kw, the overall pipe diameter is G1, the range of the oil injection quantity is 50-60L, and the range of the oil injection pressure is 2-3 kg. Judging whether the oil injection quantity data is in the oil injection quantity range and/or judging whether the oil injection pressure data is in the oil injection pressure range; and if the oil injection quantity data is lower than the oil injection quantity range or the oil injection pressure data is lower than the oil injection pressure range, generating a pressure increasing instruction, and if the oil injection quantity data is higher than the oil injection quantity range or the oil injection pressure data is higher than the oil injection pressure range, generating a pressure reducing instruction.
The oil injection quantity is the basis of direct judgment, and the oil injection pressure is the basis of indirect judgment. The adjustment of the oil injection pressure is essentially the adjustment of the oil injection quantity, because the oil injection pressure and the oil injection quantity are in a direct proportion relation under the conditions of pipe diameter temperature determination and oil product determination.
In the embodiment, the fuel injection quantity and the fuel injection pressure are adjusted simultaneously, that is, whether the fuel injection quantity data is within the fuel injection quantity range or not and whether the fuel injection pressure data is within the fuel injection pressure range or not are judged. By adopting the control method of the embodiment, the detection of the fuel injection pressure can be 1KPa, and the control precision can reach 10 KPa.
Instruction cooperation: and executing the fan control step and the oil pump control step according to the preset priority. In this embodiment, the priority of the oil pump control step is higher than that of the fan control step. That is, the oil pump control step is executed with priority, and in other embodiments, the same priority may be set, that is, the fan control step and the oil pump control step are executed at the same time.
Controlling a fan: and controlling the fan to reduce the rotating speed according to the speed reduction instruction, and controlling the fan to change the frequency and increase the rotating speed according to the speed increase instruction. The larger the difference value between the oil temperature data and the set temperature range is, the larger the adjustment on the rotating speed of the fan is;
oil pump control: and controlling the oil pump to reduce the rotating speed according to the pressure reduction instruction, and controlling the oil pump to increase the rotating speed through frequency conversion according to the pressure increase instruction. The larger the difference between the oil pressure data and the set oil pressure range is, the larger the adjustment on the rotating speed of the oil pump is. In this embodiment, the fan control and the oil pump control specifically adopt PID control.
In order to better explain the method, the embodiment also provides a screw vacuum pump using the method, which comprises a vacuum pump main machine, a fan, an oil pump and an oil-gas separation device. The fan is conventional equipment in the vacuum pump field for dispel the heat for the vacuum pump host computer. The vacuum pump host is communicated with the oil-gas separation device through an oil pipeline, and the oil pump is used for injecting lubricating oil in the oil-gas separation device into the vacuum pump host through the oil pipeline to realize oil supply. The vacuum pump main machine is also communicated with the oil-gas separation device through a vent pipe, and when the vacuum pump main machine is vacuumized, the air is discharged into the oil-gas separation device through the vent pipe.
The oil injection quantity data can be acquired by sensors such as a screw flowmeter, a gear flowmeter or a vortex shedding flowmeter, and the screw flowmeter is adopted in the embodiment and arranged on an oil way pipeline.
The oil injection pressure data is collected by a pressure transmitter and is arranged at the oil outlet of the oil pump.
The oil injection temperature data and the exhaust temperature data are acquired by temperature sensors, specifically PT100 temperature sensors. The temperature sensor for collecting oil injection temperature data is arranged on an oil way pipeline and is recorded as a temperature sensor 1, and the temperature sensor for collecting exhaust temperature data is arranged on a vent pipe and is recorded as a temperature sensor 2.
Example two
The present embodiment is different from the first embodiment in that in the oil temperature determining step, it is further determined whether the oil injection temperature data is higher than the oil injection temperature warning value, and whether the exhaust temperature data is higher than the exhaust temperature warning value, and if the oil injection temperature data is higher than the oil injection temperature warning value, or the exhaust temperature data is higher than the exhaust temperature warning value, the warning information is generated.
In the oil pressure judging step, whether the oil injection quantity data is higher than the oil injection quantity warning value or not and whether the oil injection pressure data is higher than the oil injection pressure warning value or not are also judged, and if the oil injection quantity data is higher than the oil injection quantity warning value and the oil injection pressure data is higher than the oil injection pressure warning value, alarm information is generated.
EXAMPLE III
The difference between this embodiment and the second embodiment is that in this embodiment, an effect monitoring step is further included: and after the adjustment instruction is judged to be generated, whether the corresponding data is restored to the set range within the preset time is judged, and if the corresponding data exceeds the preset time, alarm information is generated.
The adjusting instruction refers to a speed reduction instruction, a speed increasing instruction, a pressure reduction instruction and a pressure increasing instruction. The set ranges refer to an injection temperature range, an exhaust temperature range, an injection quantity range, and an injection pressure range.
For example, after the speed-up instruction is generated, whether the fuel injection temperature data is recovered to the fuel injection temperature range within the preset time is judged, and if the fuel injection temperature data exceeds the preset time, alarm information is generated.
Example four
The difference between the present embodiment and the first embodiment is that in the screw vacuum pump of the present embodiment, a vibration sensor is further installed on the vacuum pump main unit.
In the instruction cooperation step of the method, vibration data are obtained from a vibration sensor, whether the vibration data are lower than a vibration threshold value or not is judged, and if the vibration data are lower than the vibration threshold value, the fan control step and the oil pump control step have the same priority; and if the pressure is equal to or higher than the preset pressure, the priority executed in the oil pump control step is higher than that in the fan control step.
In this embodiment, the operation condition of the vacuum pump host is represented by the vibration data, and when the vibration data is equal to or higher than the vibration threshold, the vacuum pump host operates abnormally, so that the supply of the lubricating oil is preferentially ensured, and the vacuum pump host can be favorably restored to a normal state as soon as possible. The vibration threshold value can be set according to the vibration condition when the vacuum pump host operates normally.
The above are merely examples of the present invention, and the present invention is not limited to the field related to this embodiment, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art can know all the common technical knowledge in the technical field before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the scheme, and some typical known structures or known methods should not become barriers to the implementation of the present invention by those skilled in the art in light of the teaching provided in the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. The method for controlling the lubricating oil temperature of the vacuum pump in a frequency conversion mode is characterized by comprising the following steps:
collecting oil temperature: acquiring oil temperature data in real time;
oil temperature judgment: judging whether the oil temperature data is in a set temperature range; if the oil temperature data is lower than the set temperature range, a speed reduction command is generated, and if the oil temperature data is higher than the set temperature range, a speed increase command is generated;
controlling a fan: and controlling the fan to reduce the rotating speed according to the speed reduction instruction, and controlling the fan to increase the rotating speed according to the speed increase instruction.
2. The variable frequency control method for the temperature of the lubricating oil of the vacuum pump as claimed in claim 1, wherein: further comprising:
oil pressure collection: acquiring oil pressure data in real time;
oil pressure judgment: judging whether the oil pressure data is in a set oil pressure range; if the oil pressure data is lower than the set oil pressure range, generating a pressure increasing command, and if the oil pressure data is higher than the set oil pressure range, generating a pressure reducing command;
oil pump control: and controlling the oil pump to reduce the rotating speed according to the pressure reduction instruction, and controlling the oil pump to increase the rotating speed according to the pressure increase instruction.
3. The variable frequency control method for the temperature of the lubricating oil of the vacuum pump as claimed in claim 2, wherein: in the oil temperature acquisition step, the oil temperature data comprises oil injection temperature data and exhaust temperature data;
in the oil temperature judgment, the set temperature range comprises an oil injection temperature range and an exhaust temperature range; judging whether the oil injection temperature data is in the oil injection temperature range and/or judging whether the exhaust temperature data is in the exhaust temperature range;
and if the oil injection temperature data is lower than the oil injection temperature range or the exhaust temperature data is lower than the exhaust temperature range, generating a speed increasing instruction, and if the oil injection temperature data is higher than the oil injection temperature range or the exhaust temperature data is higher than the exhaust temperature range, generating the speed increasing instruction.
4. The vacuum pump lubricating oil temperature variable frequency control method according to claim 3, characterized in that: in the oil pressure acquisition step, the oil pressure data comprises oil injection quantity data and oil injection pressure data;
in the oil pressure judging step, the set oil pressure range comprises an oil injection quantity range and an oil injection pressure range; judging whether the oil injection quantity data is in the oil injection quantity range and/or judging whether the oil injection pressure data is in the oil injection pressure range;
if the oil injection quantity data is lower than the oil injection quantity range or the oil injection pressure data is lower than the oil injection pressure range, a pressure increasing instruction is generated, and if the oil injection quantity data is higher than the oil injection quantity range or the oil injection pressure data is higher than the oil injection pressure range, a pressure reducing instruction is generated.
5. The vacuum pump lubricating oil temperature variable frequency control method according to claim 2, characterized in that: in the fan control step, the larger the difference value between the oil temperature data and the set temperature range is, the larger the adjustment on the rotating speed of the fan is;
in the oil pump control step, the adjustment of the rotation speed of the oil pump is increased as the difference between the oil pressure data and the set oil pressure range is increased.
6. The vacuum pump lubricating oil temperature variable frequency control method according to claim 2, characterized in that: further comprising:
instruction cooperation: and executing the fan control step and the oil pump control step according to the preset priority.
7. The vacuum pump lubricating oil temperature variable frequency control method according to claim 6, characterized in that: in the instruction cooperation step, the priority executed in the oil pump control step is higher than that executed in the fan control step.
8. The variable frequency control method for the temperature of the lubricating oil of the vacuum pump as claimed in claim 4, wherein: in the oil temperature judging step, whether the oil injection temperature data is higher than an oil injection temperature warning value or not is judged, whether the exhaust temperature data is higher than an exhaust temperature warning value or not is judged, and if the oil injection temperature data is higher than the oil injection temperature warning value or the exhaust temperature data is higher than the exhaust temperature warning value, alarm information is generated;
in the oil pressure judging step, whether the oil injection quantity data is higher than the oil injection quantity warning value or not and whether the oil injection pressure data is higher than the oil injection pressure warning value or not are also judged, and if the oil injection quantity data is higher than the oil injection quantity warning value and the oil injection pressure data is higher than the oil injection pressure warning value, alarm information is generated.
9. The variable frequency control method for the temperature of the lubricating oil of the vacuum pump as claimed in claim 8, wherein: further comprising an effect monitoring step: and after the speed-up instruction is generated, judging whether the oil injection temperature data is recovered to the oil injection temperature range within the preset time, and if the oil injection temperature data exceeds the preset time, generating alarm information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123882.1A CN115355155A (en) | 2022-09-15 | 2022-09-15 | Lubricating oil temperature variable frequency control method for vacuum pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211123882.1A CN115355155A (en) | 2022-09-15 | 2022-09-15 | Lubricating oil temperature variable frequency control method for vacuum pump |
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| CN115355155A true CN115355155A (en) | 2022-11-18 |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204144017U (en) * | 2014-07-30 | 2015-02-04 | 国家电网公司 | Transformer Dry System |
| CN104454536A (en) * | 2014-10-29 | 2015-03-25 | 复盛实业(上海)有限公司 | Method and system for adjusting oil amount, controller and oil-injected screw compressor |
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