A fatigue simulation and performance evaluation system for vacuum pumps in oil chromatography

Abstract

The present disclosure provides a fatigue simulation and performance evaluation system for a vacuum pump in an oil chromatography system, comprising: a degassing simulation module, a temperature and humidity control module, and an acquisition and control module, wherein the degassing simulation module and the temperature and humidity control module are respectively connected to the acquisition and control module; the degassing simulation module includes a vacuum pump, a pressure sensor, and a transformer oil tank, wherein the pressure sensor is disposed on the transformer oil tank, and the vacuum pump is connected to the transformer oil tank; the temperature and humidity control module includes a cooling component, a heating component, an air humidity processing device, a temperature sensor, and a humidity sensor, and the temperature and humidity control module is used to increase or decrease the working environment temperature and / or the working environment humidity of the vacuum pump; the acquisition and control module includes a distributed intelligent terminal module, which is respectively connected to the degassing simulation module and the temperature and humidity control module. Through the present disclosure, fatigue simulation and evaluation of vacuum pumps under different environmental conditions can be achieved, thereby improving the maintenance efficiency of vacuum pumps.

Description

Technical Field

[0001] The present disclosure relates to the technical field of oil chromatography analysis, and in particular to a fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography. Background Art

[0002] Monitoring transformer health is a critical component of stable power system operation and maintenance. Online oil chromatography analysis (DGA), a key technology, predicts and diagnoses potential problems within the transformer by analyzing the types and concentrations of dissolved gases in the transformer oil. A core step in this technology is vacuum degassing, which relies on a vacuum pump to extract gas samples from the transformer oil. Unlike the relatively stable environment of the transformer tank, vacuum pumps are typically installed outdoors, exposed to a variety of environmental conditions without any protective measures, which significantly impacts their performance.

[0003] Vacuum pumps face volatile environmental conditions while performing their critical functions. For example, high humidity increases the amount of moisture in the air, leading to corrosion of internal pump components, reducing the equipment's lifespan and compromising degassing efficiency. High temperatures, on the other hand, can cause the pump to overheat, impacting its performance stability and increasing its failure rate. In dry environments, dust and other particulate matter can accumulate inside the pump, affecting its normal operation. Cold winter temperatures also pose a challenge to the efficiency and reliability of vacuum pumps, causing difficulty starting the equipment and even freezing. These fluctuations in environmental conditions not only affect the efficiency of the vacuum pump but also directly impact the accuracy and reliability of oil chromatography analysis.

[0004] Although existing technologies have provided some solutions for vacuum pump testing, such as the high-temperature aging test chamber disclosed in Chinese patent CN220252076U, which focuses on aging testing of parts in high-temperature environments and provides a diverse high-temperature testing environment for components, these methods do not fully cover the various complex environmental conditions encountered by vacuum pumps in actual operation. In particular, for low-temperature environments, the existing technical framework does not provide an effective testing solution. In addition, the current testing process lacks simulation of the vacuum pump's performance under actual operating conditions, which affects the comprehensiveness and accuracy of the test.

[0005] Furthermore, most current vacuum pump monitoring and maintenance methods rely on regular inspections, which often lack unified standards and rely on personnel experience for evaluation, limiting the accurate identification of the vacuum pump's real-time operating status and performance degradation. Since power systems are distributed across diverse geographical and climatic conditions, from the frigid north to the humid south to the dry west, vacuum pumps need to operate stably in a wide range of environmental differences, placing higher demands on the adaptability of monitoring systems. Summary of the Invention

[0006] In view of the defects in the prior art, the purpose of the present disclosure is to provide a fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography.

[0007] To achieve the above objectives, according to one aspect of the present disclosure, a fatigue simulation and performance evaluation system for a vacuum pump in an oil chromatograph is provided, comprising: a degassing simulation module, a temperature and humidity control module, and an acquisition and control module, wherein the degassing simulation module and the temperature and humidity control module are respectively connected to the acquisition and control module;

[0008] The degassing simulation module includes a vacuum pump, a pressure sensor and a transformer oil tank, wherein the pressure sensor is arranged on the top of the transformer oil tank, the vacuum pump is connected to the transformer oil tank, the pressure sensor is used to monitor the pressure in the transformer oil tank, and the vacuum pump is used to extract the gas in the transformer oil tank;

[0009] The temperature and humidity control module includes a cooling component, a heating component, an air humidity processing device, a temperature sensor, and a humidity sensor. The heating component is arranged on one side of the cooling component, the humidity control processing device is arranged on one side of the heating component, the humidity sensor is arranged on one side of the heating component, and the temperature sensor is arranged on one side of the humidity sensor. The temperature and humidity control module is used to increase or decrease the working environment temperature of the vacuum pump and / or the working environment humidity of the vacuum pump;

[0010] The acquisition and control module includes a distributed intelligent terminal module, which is respectively connected to the degassing simulation module and the temperature and humidity control module. The distributed intelligent terminal module is used to control the degassing simulation module to perform pressure adjustment operations. The distributed intelligent terminal module is also used to control the temperature and humidity control module to adjust the working environment temperature and / or working environment humidity.

[0011] Optionally, the cooling component of the temperature and humidity control module includes a heat dissipation fan, a condenser, a liquid storage tank, a filter, a capillary tube, an evaporator, and a compressor. One end of the compressor is connected to one end of the condenser, and the heat dissipation fan is arranged on one side of the condenser. The other end of the condenser is connected to one end of the liquid storage tank, the other end of the liquid storage tank is connected to one end of the filter, the other end of the filter is connected to one end of the capillary tube, the other end of the capillary tube is connected to one end of the evaporator, and the other end of the evaporator is connected to the other end of the compressor. The cooling component is used to reduce the working environment temperature of the vacuum pump.

[0012] Optionally, the heating component of the temperature and humidity control module includes a heater, and the temperature and humidity control module further includes a circulating fan, which is arranged on one side of the heater. The heating component is used to increase the working environment temperature of the vacuum pump.

[0013] Optionally, the air humidity processing device is used to increase or decrease the humidity of the working environment of the vacuum pump, the temperature sensor is used to monitor the working environment temperature of the vacuum pump, and the humidity sensor is used to monitor the working environment humidity of the vacuum pump.

[0014] Optionally, the degassing simulation module further includes a normally closed solenoid valve, which is arranged on the top of the transformer oil tank and is used to connect the transformer oil tank to the external atmospheric pressure.

[0015] Optionally, the degassing simulation module further includes an observation window and an air pipe, wherein the observation window is provided on the door of the studio and is used to observe the working status of the vacuum pump, and the vacuum pump is connected to the transformer oil tank through the air pipe.

[0016] Optionally, the acquisition and control module further includes a relay, one end of which is respectively connected to the vacuum pump and the normally closed solenoid valve, the relay is used to control the start or stop of the vacuum pump, and the relay is also used to control the opening or closing of the normally closed solenoid valve.

[0017] Optionally, the other end of the relay is connected to the distributed intelligent terminal module.

[0018] Optionally, the acquisition and control module further includes a pressure acquisition board, one end of the pressure acquisition board is connected to the pressure sensor, and the other end of the pressure acquisition board is connected to the distributed intelligent terminal module.

[0019] Optionally, a host computer module is further included, which is connected to the acquisition and control module and is used to provide a user interaction interface.

[0020] Compared with the prior art, the embodiments of the present disclosure have at least one of the following beneficial effects:

[0021] Through the above technical solution, the cooling component, heating component and air humidity processing equipment of the temperature and humidity control module are used to accurately control the working environment temperature and working environment humidity of the vacuum pump in the degassing simulation module, and the vacuum pump, transformer oil tank and pressure sensor are used to realize comprehensive fatigue simulation and evaluation of the vacuum pump under different environmental conditions; it can be applicable to complex working conditions, and realize online testing of the service life of the vacuum pump during transformer oil degassing under complex working conditions of high temperature, low temperature, high humidity and low humidity, thereby improving the practicality and reliability of the vacuum pump test; and a temperature sensor is used to monitor the working environment temperature of the vacuum pump in real time, and a humidity sensor is used to monitor the working environment humidity of the vacuum pump in real time, and the operation of the temperature and humidity control module is coordinated through the distributed intelligent terminal module to ensure the accuracy and reproducibility of the vacuum pump fatigue simulation test process, improve the vacuum pump test efficiency and test accuracy, and thereby improve the maintenance efficiency of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present disclosure will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0023] Figure 1 The figure is a schematic diagram of the overall structure of a fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to an exemplary embodiment.

[0024] Figure 2 The figure is a schematic structural diagram of a distributed intelligent terminal module according to an exemplary embodiment.

[0025] Description of Reference Numerals

[0026] 1000 Fatigue simulation and performance evaluation system for vacuum pumps in oil chromatography

[0027] 110 Temperature and humidity control module

[0028] 120 Degassing Simulation Module

[0029] 130 Acquisition and Control Module

[0030] 140 host computer module

[0031] 1 cooling fan

[0032] 2 Condenser

[0033] 3 fluid storage tanks

[0034] 4 Filters

[0035] 5 Capillary

[0036] 6 Evaporator

[0037] 7 Compressor

[0038] 8. Heater

[0039] 9 Circulation fan

[0040] 10. Air humidity treatment equipment

[0041] 11 Temperature sensor

[0042] 12 Humidity Sensor

[0043] 13 Observation Window

[0044] 14 trachea

[0045] 15 pores

[0046] 16 Transformer oil tank

[0047] 17 Normally closed solenoid valve

[0048] 18 Pressure Sensor

[0049] 19 Vacuum pump

[0050] 20 Relay

[0051] 21 Pressure acquisition board

[0052] 22 Distributed Intelligent Terminal Module

[0053] 221 Temperature Control Module

[0054] 222 Humidity Control Module

[0055] 223 Pressure Control Module

[0056] 224 Pressure communication connection port

[0057] 225 Electrical connection port

[0058] 226 Host computer communication port

[0059] 227 Temperature and humidity communication connector

[0060] 23 Host computer DETAILED DESCRIPTION

[0061] The present disclosure is described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present disclosure, but are not intended to limit the present disclosure in any way. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure. These modifications and improvements are all within the scope of protection of the present disclosure.

[0062] Figure 1The figure is a schematic diagram of the overall structure of a fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to an exemplary embodiment.

[0063] like Figure 1 As shown, the present disclosure provides a fatigue simulation and performance evaluation system 1000 for a vacuum pump in an oil chromatograph, comprising a degassing simulation module 120, a temperature and humidity control module 110, and an acquisition and control module 130. The degassing simulation module 120 and the temperature and humidity control module 110 are respectively connected to the acquisition and control module 130.

[0064] In a possible embodiment, the degassing simulation module 120 and the temperature and humidity control module 110 are respectively connected to the acquisition and control module 130 through protocol communication.

[0065] The degassing simulation module 120 includes a vacuum pump 19 , a pressure sensor 18 and a transformer oil tank 16 . The pressure sensor 18 is disposed on the top of the transformer oil tank 16 , and the vacuum pump 19 is connected to the transformer oil tank 16 .

[0066] The degassing simulation module 120 is used to simulate the actual working environment and actual working state of the vacuum pump 19 .

[0067] The transformer oil tank 16 is used to store transformer oil, the pressure sensor 18 is used to monitor the pressure in the transformer oil tank 16, and the vacuum pump 19 is used to extract the gas in the transformer oil tank 16. The vacuum pump 19 extracts the gas in the transformer oil tank 16 to simulate the vacuum degassing method.

[0068] The temperature and humidity control module 110 includes a cooling component, a heating component, an air humidity processing device 10, a temperature sensor 11 and a humidity sensor 12. The heating component is arranged on one side of the cooling component, the humidity control device is arranged on one side of the heating component, the humidity sensor 12 is arranged on one side of the heating component, and the temperature sensor 11 is arranged on one side of the humidity sensor 12.

[0069] The temperature and humidity control module 110 is used to increase or decrease the working environment temperature of the vacuum pump 19 and / or the working environment humidity of the vacuum pump 19 .

[0070] In the present disclosure, the air humidity processing device 10 is used to increase or decrease the working environment humidity of the vacuum pump 19 , the temperature sensor 11 is used to monitor the working environment temperature of the vacuum pump 19 , and the humidity sensor 12 is used to monitor the working environment humidity of the vacuum pump 19 .

[0071] The air humidity processing device 10 is an integrated humidification and dehumidification device, which accurately controls the working environment humidity of the vacuum pump 19. In addition, the air humidity processing device 10 can automatically adjust according to the real-time humidity and quickly respond to the air humidity.

[0072] The acquisition and control module 130 includes a distributed intelligent terminal module 22 , which is connected to the degassing simulation module 120 and the temperature and humidity control module 110 respectively.

[0073] The distributed intelligent terminal module 22 is used to control the degassing simulation module 120 to perform pressure adjustment operations, and the distributed intelligent terminal module 22 is also used to control the temperature and humidity control module 110 to adjust the working environment temperature and / or working environment humidity.

[0074] The working environment temperature data and working environment humidity data of the vacuum pump 19 monitored in real time by the temperature sensor 11 and the humidity sensor 12 are transmitted to the distributed intelligent terminal module 22, and the temperature information and humidity information are updated in real time to improve the accuracy of the temperature and humidity control of the system.

[0075] Through the above technical solution, the cooling component, the heating component and the air humidity processing equipment 10 of the temperature and humidity control module 110 are used to accurately control the working environment temperature and working environment humidity of the vacuum pump 19 in the degassing simulation module 120, and the vacuum pump 19, the transformer oil tank 16 and the pressure sensor 18 are used to realize comprehensive fatigue simulation and evaluation of the vacuum pump 19 under different environmental conditions; it can be applicable to complex working conditions, and realize online testing of the service life of the vacuum pump 19 during the degassing process of transformer oil under complex working conditions of high temperature, low temperature, high humidity and low humidity, thereby improving the practicality and reliability of the vacuum pump 19 test; and the temperature sensor 11 is used to monitor the working environment temperature of the vacuum pump 19 in real time, and the humidity sensor 12 is used to monitor the working environment humidity of the vacuum pump 19 in real time, and the operation of the temperature and humidity control module 110 is coordinated through the distributed intelligent terminal module 22 to ensure the accuracy and reproducibility of the fatigue simulation test process of the vacuum pump 19, improve the test efficiency and test accuracy of the vacuum pump 19, and thereby improve the maintenance efficiency of the vacuum pump 19.

[0076] In a possible embodiment, the cooling component of the temperature and humidity control module 110 includes a heat dissipation fan 1, a condenser 2, a liquid storage tank 3, a filter 4, a capillary tube 5, an evaporator 6, and a compressor 7. One end of the compressor 7 is connected to one end of the condenser 2, the heat dissipation fan 1 is arranged on one side of the condenser 2, the other end of the condenser 2 is connected to one end of the liquid storage tank 3, the other end of the liquid storage tank 3 is connected to one end of the filter 4, the other end of the filter 4 is connected to one end of the capillary tube 5, the other end of the capillary tube 5 is connected to one end of the evaporator 6, and the other end of the evaporator 6 is connected to the other end of the compressor 7.

[0077] The compressor 7, the cooling fan 1, the condenser 2, the liquid storage tank 3, the filter 4, the capillary tube 5, and the evaporator 6 form a cooling circuit. The cooling component is used to reduce the working environment temperature of the vacuum pump 19.

[0078] The compressor 7 in the cooling component is used to compress and drive the refrigerant. The compressor 7 sucks in the low-pressure gaseous refrigerant, compresses the low-pressure gaseous refrigerant to a high-pressure state, and drives the high-pressure refrigerant to the condenser 2. The refrigerant releases heat in the condenser 2 and is converted into liquid.

[0079] The cooling medium may be a refrigerant.

[0080] A refrigerant is set inside the condenser 2 in the cooling component. During the condensation process, the refrigerant circulates to convert the heat generated in the system into liquid. The refrigerant releases heat during the condensation process, realizes heat transfer, and effectively reduces the temperature inside the system.

[0081] The heat dissipation fan 1 in the cooling component is used to assist air flow, conduct the heat generated inside the fatigue simulation and performance evaluation system of the vacuum pump 19 in the oil chromatography to the external environment, maintain the temperature inside the system stable, and improve the heat dissipation efficiency of the system.

[0082] In the present disclosure, the intensity and speed of heat dissipation can be controlled by adjusting the rotational speed of the heat dissipation fan 1. The greater the rotational speed of the heat dissipation fan 1, the greater the heat dissipation intensity and heat dissipation speed of the heat dissipation fan 1. The smaller the rotational speed of the heat dissipation fan 1, the smaller the heat dissipation intensity and heat dissipation speed of the heat dissipation fan 1.

[0083] The liquid storage tank 3 in the cooling assembly is used to store the liquid refrigerant generated during the condensation process. The liquid storage tank 3 has good sealing properties, maintains the purity of the liquid refrigerant, and prevents leakage of the liquid refrigerant.

[0084] The filter 4 in the cooling component is used to filter impurities and moisture in the refrigerant medium, prevent the cooling component from being blocked by ice or dirt, avoid the impact of pollutant accumulation on system performance, effectively protect the capillary 5 and compressor 7, and ensure the smooth operation of the cooling component.

[0085] The capillary tube 5 in the cooling component is used to control the flow of the refrigerant medium, accurately adjust the quality of the refrigerant, achieve a pressure drop from the high-pressure side to the low-pressure side, reduce the pressure of the refrigerant medium, assist in the evaporation of part of the refrigerant medium, absorb the system heat, and improve the cooling effect of the cooling component.

[0086] The evaporator 6 in the cooling component is used to absorb system heat and reduce the system temperature. The liquid refrigerant medium that has been reduced in pressure and flow through the capillary tube 5 absorbs heat in the evaporator 6 and is converted into a gaseous refrigerant medium to achieve a cooling effect.

[0087] In a possible embodiment, the heating component of the temperature and humidity control module 110 includes a heater 8 , and the temperature and humidity control module 110 further includes a circulation fan 9 , which is disposed on one side of the heater 8 .

[0088] The heating component is used to increase the working environment temperature of the vacuum pump 19 .

[0089] The heater 8 in the heating component can also be provided with an over-voltage protection module. The heater 8 is used to increase the working environment temperature of the vacuum pump 19 in the system. The heater 8 converts electrical energy into thermal energy to quickly increase the temperature to the working environment temperature required by the vacuum pump 19.

[0090] The circulating fan 9 in the temperature and humidity control module 110 is used to promote air circulation, blowing the air with increased or decreased temperature to every part in the system, so as to achieve a balanced distribution of temperature and humidity in the entire working environment.

[0091] Through the above technical solution, the compressor 7, cooling fan 1, condenser 2, liquid storage tank 3, filter 4, capillary 5, evaporator 6 and heater 8 are used to accurately control the working environment temperature of the vacuum pump 19 in the system, and the air humidity processing equipment 10 is used to accurately control the working environment humidity of the vacuum pump 19 in the system, and further cooperate with the circulating fan 9 to promote temperature and humidity balance, thereby realizing the simulation of the vacuum pump 19 working under different environmental conditions.

[0092] like Figure 1 As shown, in some possible embodiments, the degassing simulation module 120 may further include an observation window 13 and an air pipe 14. The observation window 13 is set on the door of the studio. The observation window 13 is used to observe the working status of the vacuum pump 19. The vacuum pump 19 is connected to the transformer oil tank 16 through the air pipe 14.

[0093] The staff can directly observe the working status of the vacuum pump 19 through the observation window 13 without opening the door of the studio or entering the working area, thereby improving the safety and convenience of the operation.

[0094] The working chamber's housing is provided with an air hole 15 for passage of an air pipe 14, ensuring its airtightness. One end of the air pipe 14 passes through the air hole 15 and connects to a vacuum pump 19. The other end of the air pipe 14 connects to a transformer oil tank 16. This air pipe 14 establishes a sealed passage between the vacuum pump 19 and the transformer oil tank 16. The air pump extracts gas from the transformer oil tank 16 through this sealed passage, achieving simulated vacuum degassing.

[0095] In a possible embodiment, a hole is provided on the top of the transformer oil tank 16 , and the pressure sensor 18 is inserted into the hole to monitor the pressure in the transformer oil tank 16 in real time.

[0096] like Figure 1As shown, in some possible embodiments, the degassing simulation module 120 further includes a normally closed solenoid valve 17 , which is disposed on the top of the transformer oil tank 16 and is used to connect the transformer oil tank 16 to the external atmospheric pressure.

[0097] The normally closed electromagnetic valve 17 can be opened after being energized.

[0098] like Figure 1 As shown, in a possible embodiment, the acquisition and control module 130 further includes a relay 20 , and one end of the relay 20 is connected to the vacuum pump 19 and the normally closed solenoid valve 17 respectively.

[0099] The relay 20 is used as an electronically controlled switch to control the start or stop of the vacuum pump 19 . The relay 20 is also used to control the opening or closing of the normally closed solenoid valve 17 to achieve cyclic regulation of the internal pressure of the transformer oil tank 16 .

[0100] In a possible embodiment, the other end of the relay 20 is connected to the distributed intelligent terminal module 22 .

[0101] The relay 20 is used to control the normally closed electromagnetic valve 17 to open or close, thereby simulating the pressure change process in the transformer oil tank 16 under vacuum degassing.

[0102] As an example, the normally closed solenoid valve 17 is closed, and during the vacuum degassing process, the pressure in the transformer oil tank 16 is lower than the external atmospheric pressure.

[0103] As another example, the relay 20 controls the normally closed solenoid valve 17 to open, the gas dissolved in the transformer oil tank 16 is released, and the pressure in the transformer oil tank 16 gradually recovers to be equal to the external atmospheric pressure.

[0104] In a possible embodiment, the acquisition and control module 130 further includes a pressure acquisition board 21 , one end of the pressure acquisition board 21 is connected to the pressure sensor 18 , and the other end of the pressure acquisition board 21 is connected to the distributed intelligent terminal module 22 .

[0105] The pressure sensor 18 transmits the monitored pressure data in the transformer oil tank 16 to the pressure acquisition board 21 through the protocol. The pressure acquisition board 21 collects, processes and stores the pressure data in the transformer oil tank 16 in real time, and transmits the pressure data to the distributed intelligent terminal module 22.

[0106] Taking the vacuum pump 19 as the test object, the pressure sensor 18 and the pressure acquisition board 21 are set to accurately and in real time obtain the pressure dynamics of the transformer oil tank 16 during the vacuum degassing process, thereby improving the accuracy and reliability of data transmission. By testing and evaluating the vacuum pump 19, the performance of the vacuum pump 19 under actual working conditions can be judged, such as the vacuum pumping speed, the ability to maintain vacuum degree, and the stability in long-term operation.

[0107] In a possible embodiment, a fatigue simulation and performance evaluation system 1000 for a vacuum pump in an oil chromatograph further includes a host computer module 140 , which is connected to the acquisition and control module 130 and is used to provide a user interaction interface.

[0108] The host computer module 140 is in communication connection with the acquisition and control module 130 .

[0109] The host computer module 140 includes a host computer 23 , through which the staff can set test parameters, start or stop the test process, monitor the system status in real time, view test results, and perform fault diagnosis and data analysis.

[0110] The user interface of the host computer 23 can display information in a combination of images and text, such as charts, curves, and digital indicators. The host computer 23 can also implement remote monitoring and remote control through multiple network interfaces, enhancing the flexibility and usability of the system.

[0111] In a possible embodiment, the distributed intelligent terminal module 22 further includes a pressure communication connection port 224 , an electrical appliance connection port 225 , a host computer communication connection port 226 , and a temperature and humidity communication connection port 227 .

[0112] Among them, the distributed intelligent terminal module 22 is connected to the pressure acquisition board 21 through the pressure communication connection port 224, the distributed intelligent terminal module 22 is connected to the vacuum pump 19 and the pressure sensor 18 through the electrical connection port 225, the distributed intelligent terminal module 22 is connected to the host computer 23 through the host computer communication connection port 226, and the distributed intelligent terminal module 22 is connected to the temperature and humidity control module 110 through the temperature and humidity communication connection port 227.

[0113] The distributed intelligent terminal module 22 supports two communication modes: RS-232 and RS-485.

[0114] In a possible embodiment, the distributed intelligent terminal module 22 includes a temperature control module 221 , a humidity control module 222 , and a pressure control module 223 .

[0115] The temperature control module 221 is configured to read the temperature value of the temperature sensor 11. When the temperature value is not less than the preset temperature value in the host computer module 140, it controls the operation of the various devices in the cooling component of the temperature and humidity control module 110. When the temperature value is less than the preset temperature value in the host computer module 140, it controls the operation of the various devices in the heating component of the temperature and humidity control module 110. The pressure control module 223 is configured to obtain the pressure value of the pressure acquisition board 21. When the pressure value is less than the preset pressure value in the host computer module 140, it controls the relay 20 to open the normally closed solenoid valve 17, restoring the pressure in the transformer oil tank 16 to the external atmospheric pressure. The humidity control module 222 is configured to read the humidity value of the humidity sensor 12. When the humidity value is not less than the preset humidity value in the host computer module 140, it controls the air humidity processing device 10 to reduce the humidity. When the humidity value is less than the preset humidity value in the host computer module 140, it controls the air humidity processing device 10 to increase the humidity.

[0116] Through the above technical solution, the environmental conditions are monitored in real time through the temperature sensor 11, the humidity sensor 12 and the pressure sensor 18, the distributed intelligent terminal module 22 is used to coordinate the operation of the temperature and humidity control module 110 and the degassing simulation module 120, and the test parameters are set and the test process is monitored through the host computer module 140 to ensure the test and reproducibility of the vacuum pump 19.

[0117] In one possible embodiment, the operating phase of a fatigue simulation and performance evaluation system 1000 for a vacuum pump in an oil chromatography system includes:

[0118] 1. Install the vacuum pump to be tested 19:

[0119] Physically connect the vacuum pump 19 to be tested to the fatigue simulation and performance evaluation system 1000 for the vacuum pump in oil chromatography, and confirm whether the vacuum pump 19 is correctly installed through the observation window 13;

[0120] 2. Set environmental parameters:

[0121] The staff sets the temperature preset value, humidity preset value, pressure preset value required to start the normally closed solenoid valve 17 and the duration of the pressure preset value through the host computer module 140 according to the standard working conditions of the vacuum pump 19 to be tested or specific test requirements.

[0122] 3. Adjust temperature and humidity:

[0123] The distributed intelligent terminal module 22 receives the control instruction of the host computer module 140 and controls the temperature and humidity control module 110 to reach the preset temperature value and the preset humidity value.

[0124] 4. Simulate the pumping process:

[0125] When the temperature inside the system reaches the preset temperature value and the humidity of the system reaches the preset humidity value, the vacuum pump 19 is started to extract the gas in the transformer oil tank 16 to create a negative pressure environment. The pressure sensor 18 monitors the pressure changes in the transformer oil tank 16 in real time and transmits the pressure data to the distributed intelligent terminal module 22 in real time. When the pressure sensor 18 detects that the pressure in the transformer oil tank 16 reaches the preset pressure value, the distributed intelligent terminal module 22 controls the normally closed solenoid valve 17 to open through the control relay 20, and the dissolved gas in the transformer oil tank 16 is released. In addition, the pressure in the transformer oil tank 16 is restored to the external atmospheric pressure, and the normally closed solenoid valve 17 is closed to complete a vacuum degassing simulation. The number of cycles in the host computer module 140 is increased by one.

[0126] 5. End:

[0127] If the pressure sensor 18 detects that the pressure value in the transformer oil tank 16 does not reach the preset pressure value within the preset time t, the distributed intelligent terminal module 22 automatically shuts down the devices in the temperature and humidity control module 110 and the degassing simulation module 120, and sends an instruction to the host computer module 140. The host computer module 140 outputs the number of cycles, which represents the cycle life of the vacuum pump 19 under the preset environmental parameter conditions.

[0128] In a possible embodiment, the working scenarios and response measures of the acquisition and control module 130 include the following situations:

[0129] Working scenario 1: The acquisition and control module 130 reports that the vacuum pump 19 fails to start.

[0130] Trigger condition: Vacuum pump 19 cannot be started.

[0131] Response measures: The host computer module 140 issues an alarm and automatically stops the system operation. The staff is instructed to check the power connection or internal status of the vacuum pump 19 and repair or replace the vacuum pump 19 if necessary.

[0132] Working scenario 2: the acquisition and control module 130 reports that no pressure value is detected.

[0133] Trigger condition: The pressure acquisition board 21 does not read the pressure value collected by the pressure sensor 18.

[0134] Response measures: The host computer module 140 issues an alarm, automatically stops the system, and provides troubleshooting instructions to the staff. The staff checks whether the connection between the pressure sensor 18 and the pressure acquisition board 21 is stable and reliable.

[0135] Working scenario three: the acquisition and control module 130 reports that the temperature value deviates from the preset temperature value or the humidity value deviates from the preset humidity value.

[0136] Trigger condition: The temperature sensor 11 or the humidity sensor 12 detects that the ambient temperature or humidity in the system deviates from the temperature preset value or humidity preset value in the host computer module.

[0137] Response: The host computer module 140 automatically controls the distributed intelligent terminal module 22 to adjust the heating and cooling components in the temperature and humidity control module 110 or the air humidity processing device 10 to restore the temperature or humidity to the preset temperature or humidity value. If the adjustment fails, the host computer module 140 issues an alarm, automatically stops the system, and instructs personnel to conduct an inspection.

[0138] Working scenario 4: the acquisition and control module 130 reports data transmission abnormality.

[0139] Trigger condition: The data monitored by the temperature sensor 11, humidity sensor 12, and pressure sensor 18 cannot be transmitted to the distributed intelligent terminal module 22 via the RS-232 / RS-485 protocol.

[0140] Response measures: The host computer module 140 issues an alarm and automatically stops the system. The staff checks whether the connection between the sensor and the distributed intelligent terminal module 22 is stable and reliable, and replaces or reconfigures the hardware if necessary.

[0141] Working scenario five: the acquisition and control module 130 reports that the life test is completed.

[0142] Triggering condition: the vacuum pump 19 can no longer pump the pressure in the transformer oil tank 16 to the preset pressure value within the preset time t.

[0143] Response: The host computer module 140 terminates the test cycle and generates a test report and life assessment results for the vacuum pump 19 to be tested. Operation and maintenance personnel can use the fatigue life of the vacuum pump 19 to be tested under these environmental conditions as a basis for determining the maximum life of the vacuum pump 19 during on-site online oil chromatography testing.

[0144] Through the working scenarios and response measures of the above-mentioned collection and control module 130, it is possible to quickly assist staff in troubleshooting faults caused by system operation and maintenance, and evaluate the fatigue life of the vacuum pump 19, provide a life basis for the on-site vacuum pump 19, and replace the vacuum pump 19 with degraded performance in time, thereby improving the accuracy and reliability of the detection of dissolved gas concentration in transformer oil, and providing strong support for the stable and reliable operation of the store system.

[0145] The present disclosure provides a fatigue simulation and performance evaluation system 1000 for a vacuum pump in an oil chromatograph, which has a high degree of automation, is easy to operate, can greatly improve the test efficiency, and provides a more scientific and accurate method for the maintenance and life evaluation of the vacuum pump 19.

[0146] The above describes specific embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the specific embodiments described above, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present disclosure. The above preferred features may be used in any combination as long as they do not conflict with each other.

Claims

1. A fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography, characterized in that: include: A degassing simulation module, a temperature and humidity control module, and an acquisition and control module, wherein the degassing simulation module and the temperature and humidity control module are respectively connected to the acquisition and control module; The degassing simulation module includes a vacuum pump, a pressure sensor and a transformer oil tank, wherein the pressure sensor is arranged on the top of the transformer oil tank, the vacuum pump is connected to the transformer oil tank, the pressure sensor is used to monitor the pressure in the transformer oil tank, and the vacuum pump is used to extract the gas in the transformer oil tank; The temperature and humidity control module includes a cooling component, a heating component, an air humidity processing device, a temperature sensor, and a humidity sensor. The heating component is arranged on one side of the cooling component, the air humidity processing device is arranged on one side of the heating component, the humidity sensor is arranged on one side of the heating component, and the temperature sensor is arranged on one side of the humidity sensor. The temperature and humidity control module is used to increase or decrease the working environment temperature of the vacuum pump and / or the working environment humidity of the vacuum pump; The acquisition and control module includes a distributed intelligent terminal module, which is respectively connected to the degassing simulation module and the temperature and humidity control module. The distributed intelligent terminal module is used to control the degassing simulation module to perform pressure adjustment operations. The distributed intelligent terminal module is also used to control the temperature and humidity control module to adjust the working environment temperature and / or working environment humidity.

2. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 1, characterized in that: The cooling component of the temperature and humidity control module includes a heat dissipation fan, a condenser, a liquid storage tank, a filter, a capillary tube, an evaporator, and a compressor. One end of the compressor is connected to one end of the condenser, and the heat dissipation fan is arranged on one side of the condenser. The other end of the condenser is connected to one end of the liquid storage tank, the other end of the liquid storage tank is connected to one end of the filter, the other end of the filter is connected to one end of the capillary tube, the other end of the capillary tube is connected to one end of the evaporator, and the other end of the evaporator is connected to the other end of the compressor. The cooling component is used to reduce the working environment temperature of the vacuum pump.

3. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 1, characterized in that: The heating component of the temperature and humidity control module includes a heater, and the temperature and humidity control module also includes a circulation fan, which is arranged on one side of the heater. The heating component is used to increase the working environment temperature of the vacuum pump.

4. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 1, characterized in that: The air humidity processing device is used to increase or decrease the humidity of the working environment of the vacuum pump, the temperature sensor is used to monitor the working environment temperature of the vacuum pump, and the humidity sensor is used to monitor the working environment humidity of the vacuum pump.

5. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 1, characterized in that: The degassing simulation module further includes a normally closed solenoid valve, which is disposed on the top of the transformer oil tank and is used to connect the transformer oil tank to external atmospheric pressure.

6. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 5, characterized in that: The degassing simulation module further includes an observation window and an air pipe. The observation window is provided on the door of the working room and is used to observe the working status of the vacuum pump. The vacuum pump is connected to the transformer oil tank through the air pipe.

7. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 5, characterized in that: The acquisition and control module also includes a relay, one end of which is connected to the vacuum pump and the normally closed solenoid valve respectively. The relay is used to control the start or stop of the vacuum pump, and the relay is also used to control the opening or closing of the normally closed solenoid valve.

8. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 7, characterized in that: The other end of the relay is connected to the distributed intelligent terminal module.

9. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 7, characterized in that: The acquisition and control module further includes a pressure acquisition board, one end of the pressure acquisition board is connected to the pressure sensor, and the other end of the pressure acquisition board is connected to the distributed intelligent terminal module.

10. The fatigue simulation and performance evaluation system for a vacuum pump in oil chromatography according to claim 1, characterized in that: It also includes a host computer module, which is connected to the acquisition and control module and is used to provide a user interaction interface.

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