CN113864174A - Compressor online detection device and compressor online detection method - Google Patents
Compressor online detection device and compressor online detection method Download PDFInfo
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- CN113864174A CN113864174A CN202010614040.0A CN202010614040A CN113864174A CN 113864174 A CN113864174 A CN 113864174A CN 202010614040 A CN202010614040 A CN 202010614040A CN 113864174 A CN113864174 A CN 113864174A
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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
- F04B51/00—Testing machines, pumps, or pumping installations
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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
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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
- F04B39/10—Adaptations or arrangements of distribution members
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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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/123—Fluid connections
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Abstract
The invention relates to the technical field of compressor online detection, and provides compressor online detection equipment and a compressor online detection method. The compressor on-line detection device comprises: the stabilized voltage power supply is connected with the compressor to be tested; the air suction pressure stabilizing assembly is connected in an air suction pipeline of the compressor to be detected and is used for adjusting the air suction pressure of the compressor to be detected; the exhaust pressure stabilizing assembly is connected in an exhaust pipeline of the compressor to be tested and used for adjusting the exhaust pressure of the compressor to be tested so that the compressor to be tested has a load operation stage with constant exhaust pressure; and the acquisition device is connected with the compressor to be detected and is used for acquiring the operation parameters of the compressor to be detected in the load operation stage. The invention can realize flexible, stable and accurate detection of the operation parameters of the compressor to be tested and meet the test requirements of the compressor to be tested.
Description
Technical Field
The invention relates to the technical field of compressor online detection, in particular to online detection equipment and an online detection method for a compressor.
Background
Before the compressor is put into use, an energy efficiency test needs to be carried out. The traditional test equipment mostly adopts a pressurized load discharge tester to test the running parameters of the compressor, such as low-voltage starting current, low-voltage running current, pressurized test power, pressurized time, pressurized pressure and the like. However, the traditional test equipment cannot effectively control the voltage, the suction pressure and the exhaust pressure of the test working condition, so that the energy efficiency test requirement of the compressor cannot be finally met.
Particularly, on the one hand, the voltage input form of the test working condition of the traditional test equipment is factory industrial electricity input, certain fluctuation and interference exist, and different voltage requirements of different models cannot be met.
On the other hand, the traditional test equipment cannot stably control the suction and discharge pressure of the test working condition, so that the acquired electrical parameters of the compressor are inaccurate, and the test result is influenced. And the traditional test equipment is not easy to reach a higher pressure set value, and the requirement of compressor energy efficiency total number detection cannot be met.
On the other hand, one part of the traditional test equipment measures the electrical parameters of the compressor under the pressurization state, and at the moment, the electrical parameters of the compressor fluctuate greatly, and the acquired data are unstable, so that the test result is inaccurate. The other part samples at the moment when the pressure reaches a set value, and the error of the final test result is larger due to the fact that sampling time is short and sampling precision is limited.
Referring to the test condition schematic diagram of the conventional test equipment shown in fig. 1, the compressor is started through the equilibrium operation stage 101, then the compressor is pressurized through the pressurization operation stage 102, and when the pressure reaches the set value 102', the pressure immediately enters the pressure relief stage 103, so that a test cycle is completed. No matter the data sampling is selected in the pressurization operation stage 102 or at the moment when the pressure reaches the set value 102', the acquired data accuracy is not enough due to no constant test condition, and the test result is influenced.
It can be seen that the traditional test equipment can not meet the requirement for detecting the energy efficiency of the compressor. Along with the quality index and the requirement that product energy efficiency management and control becomes air conditioner trade more and more, a test equipment that can realize nimble, stable, accurate detection is urgently needed.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the compressor online detection equipment and the compressor online detection method, which can realize flexible, stable and accurate detection and meet the requirement of testing the energy efficiency of the compressor.
According to an aspect of the present invention, there is provided an online inspection apparatus for a compressor, including: the stabilized voltage power supply is connected with the compressor to be tested; the air suction pressure stabilizing assembly is connected in an air suction pipeline of the compressor to be detected and is used for adjusting the air suction pressure of the compressor to be detected; the exhaust pressure stabilizing assembly is connected in an exhaust pipeline of the compressor to be tested and used for adjusting the exhaust pressure of the compressor to be tested so that the compressor to be tested has a load operation stage with constant exhaust pressure; and the acquisition device is connected with the compressor to be detected and is used for acquiring the operation parameters of the compressor to be detected in the load operation stage.
In some embodiments, the inspiratory pressure stabilizing assembly comprises: the suction pressure sensor is connected with the suction end of the compressor to be detected and used for detecting the suction pressure of the compressor to be detected; and the air suction pressure regulating valve is arranged at the upstream of the air suction pressure sensor and used for regulating the air suction pressure according to the detection of the air suction pressure sensor.
In some embodiments, the air intake pressure stabilizing assembly further comprises a pressure reducing valve disposed at an inlet end of the air intake line upstream of the air intake pressure regulating valve, the pressure reducing valve being configured to regulate an air supply pressure delivered to the air intake line; the pressure reducing valve is also in communication connection with the air suction pressure sensor so as to adjust the air source pressure according to the detection of the air suction pressure sensor.
In some embodiments, the intake pressure stabilizing assembly further comprises a buffer storage device disposed between the pressure reducing valve and the intake pressure regulating valve, the buffer storage device being configured to regulate the flow of gas in the intake line.
In some embodiments, the inspiratory pressure stabilizing assembly further comprises: the low-pressure control device is arranged at the inlet end of the air suction pipeline and is positioned at the upstream of the pressure reducing valve, and the low-pressure control device is used for giving an alarm when the air source pressure is smaller than the lowest threshold value; and the filter is arranged between the suction pressure sensor and the suction end of the compressor to be detected and is used for filtering the suction gas of the compressor to be detected.
In some embodiments, the exhaust gas stabilizer assembly comprises: the exhaust pressure sensor is connected with the exhaust end of the compressor to be detected and is positioned in a main path of the exhaust pipeline, and the exhaust pressure sensor is used for detecting the exhaust pressure of the compressor to be detected; the backpressure valve is arranged at the downstream of the exhaust pressure sensor and is positioned in a pressure stabilizing branch of the exhaust pipeline, and the backpressure valve is used for adjusting the exhaust pressure according to the detection of the exhaust pressure sensor.
In some embodiments, the exhaust pressure stabilizing assembly further comprises a plurality of sets of pressure boosting devices disposed downstream of the exhaust pressure sensor and in the main circuit, each set of pressure boosting devices comprising a pressure boosting tank and a pressure boosting valve.
In some embodiments, the exhaust pressure stabilizing assembly further comprises at least one pressure relief valve disposed downstream of the pressure boosting device, each pressure relief valve being located in a pressure relief branch of the exhaust line, the pressure relief branch being connected in parallel with the pressure stabilizing branch.
In some embodiments, the exhaust pressure stabilizing assembly further comprises: the temperature control device is connected with the exhaust end of the compressor to be tested and is positioned at the upstream of the exhaust pressure sensor, and the temperature control device is used for giving an alarm when the exhaust temperature of the compressor to be tested is greater than a maximum temperature threshold; and the high-pressure control device is arranged between the temperature control device and the exhaust pressure sensor and is used for giving an alarm when the exhaust pressure is greater than the highest pressure threshold value.
In some embodiments, the acquisition device comprises: the air suction detection device is connected with the air suction end of the compressor to be detected and is used for detecting and collecting air suction parameters of the compressor to be detected; the exhaust detection device is connected with the exhaust end of the compressor to be detected and is used for detecting and collecting the exhaust parameters of the compressor to be detected; and the calculating device is used for obtaining the detection result of the compressor to be detected according to the air suction parameter and the air exhaust parameter.
According to another aspect of the present invention, there is provided an online compressor detection method, based on the online compressor detection device of any of the above embodiments, the online compressor detection method including: outputting a preset voltage to the compressor to be tested through the stabilized voltage power supply; adjusting the suction pressure of the compressor to be tested to a preset suction pressure value through the suction pressure stabilizing assembly; adjusting the exhaust pressure of the compressor to be tested to a preset exhaust pressure value through the exhaust pressure stabilizing assembly, so that the compressor to be tested enters a load operation stage with constant exhaust pressure; and acquiring multiple groups of operation parameters of the compressor to be detected in the load operation stage through the acquisition device to obtain a detection result of the compressor to be detected.
Compared with the prior art, the invention has the beneficial effects that:
the stable voltage is output according to the model of the compressor to be detected through the voltage-stabilized power supply, controllable power supply is realized, power supply input is purified, and power grid fluctuation interference is avoided;
the air suction pressure of the compressor to be tested is adjusted through the air suction pressure stabilizing assembly, so that the air suction pressure is kept stable, and the operation parameters of the subsequent compressor to be tested in the load operation stage are kept stable and accurate;
the exhaust pressure of the compressor to be tested is adjusted through the exhaust pressure stabilizing assembly, so that the compressor to be tested keeps constant exhaust pressure according to test requirements, the acquisition device can acquire the operation parameters of the compressor to be tested in a load operation stage, the sampling time is long, the sampling data is sufficient, the acquired operation parameters are stable and accurate, and the test requirements of the compressor to be tested are met;
therefore, the invention can realize flexible, stable and accurate detection of the operation parameters of the compressor to be tested and meet the energy efficiency test requirement of the compressor to be tested.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 shows a schematic diagram of a test condition of a conventional test apparatus;
FIG. 2 is a block diagram showing the structure of an on-line detection apparatus for a compressor in the embodiment of the present invention;
FIG. 3 is a piping diagram of an on-line inspection apparatus for a compressor in an embodiment of the present invention;
FIG. 4 is a schematic view illustrating a test condition of the compressor online detection device according to the embodiment of the invention;
FIG. 5 shows a control diagram of the load operation phase in an embodiment of the invention; and
fig. 6 is a schematic diagram illustrating steps of an online detection method for a compressor according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
Fig. 2 is a block diagram showing the structure of the main components of the online compressor detection device in the embodiment, and referring to fig. 2, the online compressor detection device in the embodiment mainly includes: the stabilized voltage power supply 11 is connected with the compressor 2 to be tested; the air suction pressure stabilizing assembly 12 is connected to an air suction pipeline P1 of the compressor 2 to be tested and is used for adjusting the air suction pressure of the compressor 2 to be tested; the exhaust pressure stabilizing assembly 13 is connected in an exhaust pipeline P2 of the compressor 2 to be tested and used for adjusting the exhaust pressure of the compressor 2 to be tested so that the compressor 2 to be tested has a load operation stage with constant exhaust pressure; and the acquisition device 14 is connected with the compressor 2 to be tested and is used for acquiring the operation parameters of the compressor 2 to be tested in the load operation stage.
The stable voltage input is the first factor that enables accurate detection of the operating parameters of the compressor under test. The traditional test equipment adopts a mode of industrial electricity input and servo adjustment output of a voltage regulator, has the defect of poor stability, and is easy to generate the phenomena of pressure drop fluctuation and the like in the test process. In the embodiment, the stable voltage is output to the model of the compressor 2 to be detected through the voltage-stabilized power supply 11. The power supply frequency of the regulated power supply 11 includes 50HZ, 60HZ, a single-phase power supply and a three-phase power supply, and can be adapted to various models such as constant speed, variable frequency and three-phase. The voltage-stabilized power supply 11 can purify input primary side power supply fluctuation, is free from power grid fluctuation and external interference influence, has high control precision, and is favorable for realizing constant load operation working conditions.
The stable suction pressure and the discharge pressure are the second elements for maintaining the constant load operation condition and realizing the accurate detection of the operation parameters of the compressor to be detected. Traditional test equipment only sets up the air supply pressure that single valve adjustment got into the pipeline of breathing in at the air supply entry, can't carry out the management and control to situations such as atmospheric pressure reduction, suction pressure unstability in the test procedure. In this embodiment, the suction pressure of the compressor 2 to be tested is adjusted through the suction pressure stabilizing assembly 12, so that the suction pressure is kept stable, a continuous constant pressure working condition is created, and the subsequent compressor 2 to be tested can maintain a constant load operation working condition.
In addition, the traditional test equipment carries out pressure relief after the exhaust pressure of the compressor reaches a set value, and the compressor keeps stable operation parameters under the condition of no continuous constant pressure working condition. In this embodiment, the exhaust pressure of the compressor 2 to be tested is adjusted by the exhaust pressure stabilizing assembly 13, so that the compressor 2 to be tested maintains a constant exhaust pressure according to the test requirement, so as to achieve the pressure working condition at the load operation stage. The suction pressure and the exhaust pressure of the compressor 2 to be tested can be adjusted and controlled, so that the pressure ratio of the compressor 2 to be tested can be adjusted as required according to different test requirements, the pressure adjustment range is wide, and the compressor 2 to be tested can keep stable operation in a load operation stage with enough sampling time.
The operation parameter acquisition and calculation at the load operation stage with constant exhaust pressure are the third elements for realizing the accurate detection of the compressor 2 to be detected. The traditional test equipment samples at the moment when the exhaust pressure of the compressor reaches a set value, the sampling data is single, the consistency and the accuracy are poor, and the error of a test result is large. In the embodiment, the operation parameters of the compressor 2 to be tested at the load operation stage are collected under the condition of keeping the constant exhaust pressure of the compressor 2 to be tested, the sampling time is long, the sampling data is sufficient, the collected operation parameters are stable and accurate, and the test requirement of the compressor to be tested is met. In the embodiment, multiple groups of detection data can be obtained by a multi-sampling integration method, so that the energy efficiency total number detection of the compressor 2 to be detected is realized.
Therefore, the compressor online detection equipment of the embodiment realizes flexible, stable and accurate detection of the operation parameters of the compressor 2 to be detected through the stabilized voltage power supply 11, the air suction stabilized voltage component 12, the exhaust stabilized voltage component 13 and the acquisition device 14, and meets the energy efficiency test requirement of the compressor 2 to be detected.
In some embodiments, as shown in fig. 2, the components of the intake pressure stabilizing assembly 12 for regulating, adjusting and stabilizing the intake pressure mainly include: the suction pressure sensor 121 is connected with the suction end 2a of the compressor 2 to be detected and used for detecting the suction pressure of the compressor 2 to be detected; and an intake pressure regulating valve 122 provided upstream of the intake pressure sensor 121 for regulating the intake pressure in accordance with the detection of the intake pressure sensor 121. That is, the suction pressure regulating valve 122 regulates the suction pressure transmitted to the suction end 2a of the compressor 2 to be measured in the suction pipeline P1 to a preset pressure value according to the detection value of the suction pressure sensor 121, so that the suction pressure is kept stable.
Further, the intake pressure stabilizing assembly 12 further includes a pressure reducing valve 123 disposed at an inlet end (i.e., an end connected to the nitrogen source) of the intake line P1 and upstream of the intake pressure regulating valve 122, wherein the pressure reducing valve 123 is used for regulating the pressure of the air source delivered to the intake line P1. The gas sucked in the suction pipeline P1 is nitrogen, so as to simulate the operation condition of the compressor 2 to be tested and obtain the operation parameters. After the nitrogen enters the air suction pipeline P1, the pressure of the air source is adjusted through the pressure reducing valve 123, and the pressure of the nitrogen entering the air suction pipeline P1 is adjusted to be stable and in a fluctuation-free state.
The pressure reducing valve 123 is also in communication connection with the suction pressure sensor 121, so as to adjust the pressure of the air source according to the detection of the suction pressure sensor 121, so that the pressure of the nitrogen entering the suction pipeline P1 can meet the test requirement of the subsequent compressor 2 to be tested.
Fig. 3 shows a pipeline diagram of the online compressor detection device in the embodiment of the present invention, and as described with reference to fig. 3, the online compressor detection device may detect operating parameters of multiple compressors to be detected in parallel under different working conditions. For example, fig. 3 shows two parallel test circuits, respectively designated as a first test circuit 301 and a second test circuit 302, for testing two compressors 2 under test. The first test pipeline 301 and the second test pipeline 302 are used for respectively performing operation parameter tests on the compressor 2 to be tested under different pressure ratio conditions, and different operation test working conditions are simulated by adjusting the pressure ratio of the suction pressure and the exhaust pressure so as to detect the quality condition of the compressor 2 to be tested. The first test pipeline 301 and the second test pipeline 302 suck nitrogen from the same air source inlet 30, and after the pressure of the air source is adjusted by the pressure reducing valve 123, parallel suction pipelines P1 connected to the two compressors 2 to be tested are formed. The pressure reducing valve 123 is in communication connection with the suction pressure sensor 121 in each suction line P1, and may be in electrical connection or signal connection, so as to determine the air source pressure to be adjusted at the air source inlet 30 according to the detection value of the suction pressure sensor 121 in each suction line P1, so that the air source pressure meets the test requirement of the compressor 2 to be tested in each subsequent suction line P1.
The following description will be made of other components in the suction line P1, taking the first test line 301 as an example. As shown in fig. 2 and 3, the intake pressure stabilizing assembly 12 further includes a buffer storage device disposed between the pressure reducing valve 123 and the intake pressure regulating valve 122, and the buffer storage device is used for regulating the flow rate of the gas in the intake line P1. The buffer storage device specifically comprises an air storage tank 1241, which can store a part of nitrogen in the air suction pipeline P1 to prevent the nitrogen in the air suction pipeline P1 from being sucked to a negative pressure state, and the capacity of the air storage tank 1241, for example 22L, can be flexibly adjusted according to the number of the compressors 2 to be tested connected in parallel; the air compensating valve 1242 adjusts the air flow in the air suction pipeline P1 through the opening state; the buffer tank 1243 may buffer and store a part of the gas, thereby further improving the stability of the flow rate of the gas to be sucked and preventing the fluctuation of the suction line P1. Between the aeration valve 1242 and the surge tank 1243, a check valve 1244 may be provided to prevent back-suction of gas.
Further, the intake pressure stabilizing assembly 12 further includes: and the low-pressure control device 125 is arranged at the inlet end of the suction pipeline P1 and is positioned at the upstream of the pressure reducing valve 123, and the low-pressure control device 125 is used for giving an alarm when the air source pressure is smaller than the minimum threshold value so as to prevent the insufficient pressure of the nitrogen sucked in the suction pipeline P1. And a filter 126, which is arranged between the suction pressure sensor 121 and the suction end of the compressor 2 to be tested, and is used for filtering the suction gas of the compressor 2 to be tested to prevent the suction gas from being impure. Thus, with the above arrangement, the suction line P1 can provide stable, clean, and controllable test gas to the compressor 2 to be tested.
In addition, other components capable of assisting detection may be provided in the suction line P1. For example, at the gas source inlet 30, a gas inlet pressure gauge 1271 is provided to monitor the gas source pressure, and a gas consumption meter 1272 is provided to count the nitrogen flow. At the suction end of the compressor 2 to be tested, a low pressure meter 1273 is arranged to monitor the suction pressure, and a suction temperature sensor 1274 is arranged to monitor the suction temperature. Meanwhile, some related valves can be configured, and the test process is stopped when any monitoring data is abnormal.
As shown in fig. 2 and fig. 3, the components of the exhaust pressure stabilizing assembly 13 for controlling, adjusting and maintaining the exhaust pressure mainly include: the discharge pressure sensor 131 is connected with the discharge end 2b of the compressor 2 to be tested and is positioned in the main path of the discharge pipeline P2, and the discharge pressure sensor 131 is used for detecting the discharge pressure of the compressor 2 to be tested; and a back pressure valve 132 provided downstream of the exhaust pressure sensor 131 and in a pressure stabilizing branch P21 of the exhaust line P2, the back pressure valve 132 being for regulating the exhaust pressure according to detection of the exhaust pressure sensor 131. That is, the back pressure valve 132 controls the discharge pressure of the compressor 2 to be tested according to the detection value of the discharge pressure sensor 131, so that the discharge pressure of the compressor 2 to be tested reaches and is maintained at a constant pressure value set according to the test requirement, and the requirement of stable discharge pressure in the load operation stage is met.
Further, the suction line P1, specifically, a path led out from the suction pressure regulating valve 122, is connected to the back pressure valve 132 through a balance valve 1331 and an exhaust valve 1332, so as to facilitate the adjustment of the suction-exhaust pressure ratio as required. The backpressure valve 132 may be followed by a safety relief valve 1333 to relieve pressure in time when a round of testing is completed, or when pressure in the pressure stabilizing branch P21 is abnormal. A check valve 1334 and a condenser 1335 may be provided between the backpressure valve 132 and the safety relief valve 1333 to prevent gas from being discharged backwards and cool the gas, so as to facilitate subsequent recovery processing and recycle to the suction line P1.
The exhaust pressure stabilizing assembly 13 further includes a plurality of sets of pressure boosting devices, such as a first set of pressure boosting devices 1341 and a second set of pressure boosting devices 1342 shown in fig. 3, disposed downstream of the exhaust pressure sensor 131 and located in the main path of the exhaust pipeline P2, so as to recover the gas, prolong the exhaust time, and facilitate the collection of the exhaust parameters of the compressor 2 to be measured. Each set of booster devices includes a booster tank and a booster valve, and the capacity of each set of booster devices may be different, for example, in fig. 3, the capacity of the booster tank and the capacity of the booster valve of the first set of booster devices 1341 are both 0.3L, and the capacity of the booster tank and the capacity of the booster valve of the second set of booster devices 1342 are both 0.6L.
The exhaust pressure stabilizing assembly 13 further comprises at least one pressure relief valve disposed downstream of the pressure boosting device, each pressure relief valve being disposed in a pressure relief branch P22 of the exhaust line P2, the pressure relief branch P22 being connected in parallel with the pressure stabilizing branch P21. For example, fig. 3 shows a main relief valve 1351 and an excess pressure relief valve 1352, and a pressure relief branch P22 where the main relief valve 1351 is located serves as a main pressure relief branch for releasing exhaust gas in a pressure relief stage to reduce the exhaust gas pressure. The pressure relief valve 1352 is located in the pressure relief branch P22 as an auxiliary pressure relief branch. An oil separator 1353 is further provided in the exhaust line P2 to separate oil from gas, and the separated oil is discharged through an oil discharge valve 1354. The suction pipeline P1 of the compressor 2 to be tested, specifically before the suction end of the compressor 2 to be tested, may be led out one way separately through the inlet pressure relief valve 1355, so as to be discharged in time when the suction pressure is abnormal. In the piping downstream of each pressure relief valve, the exhaust gas may be filtered and purified by an exhaust gas cleaner 1356.
Further, some monitoring devices may be disposed in the exhaust pressure stabilizing assembly 13 to monitor the exhaust parameters of the compressor 2 to be tested. The method specifically comprises the following steps: the temperature control device 1361, for example, includes an exhaust temperature sensor and a temperature control switch, and is connected to the exhaust end of the compressor 2 to be tested and located upstream of the exhaust pressure sensor 131, and the temperature control device 1361 is configured to give an alarm when the exhaust temperature of the compressor 2 to be tested is greater than the maximum temperature threshold. The high-pressure control device 1362 is arranged between the temperature control device 1361 and the exhaust pressure sensor 131, and the high-pressure control device 1362 is used for giving an alarm when the exhaust pressure is greater than the highest pressure threshold value. A relief valve 1363 may also be provided for relieving pressure in time when the exhaust pressure is too high. Additionally, exhaust pressure may be monitored by a high pressure gauge 1364.
Through the arrangement of the exhaust pressure stabilizing assembly 13, the exhaust pressure of the compressor 2 to be tested is effectively controlled, the exhaust pressure can be adjusted as required, and the test requirement of the compressor 2 to be tested is met.
Referring to fig. 2, the collecting device 14 includes: the air suction detection device 141 is connected with the air suction end 2a of the compressor 2 to be detected and is used for detecting and collecting air suction parameters of the compressor 2 to be detected; the exhaust detection device 142 is connected with the exhaust end 2b of the compressor 2 to be detected and used for detecting and collecting the exhaust parameters of the compressor 2 to be detected; and a calculating device 143 for obtaining the detection result of the compressor 2 to be detected according to the air suction parameter and the air discharge parameter. The acquisition device 14 can be controlled by a programmable logic controller PLC to acquire and calculate.
In addition, the regulated power supply 11 is connected with a power supply and can control voltage parameter detection and adjustment by a Programmable Logic Controller (PLC) so as to deliver stable voltage to the compressor 2 to be detected.
Fig. 4 shows a test condition of the online compressor detection device in the embodiment, and the online compressor detection device described in any of the above embodiments can be used to enable the compressor to be tested to respectively go through a balance operation stage 401, a pressurization operation stage 402, a load operation stage 403, and a pressure relief stage 404 in a round of test process. The balance operation stage 401 is used for starting and preheating the compressor to be tested by adjusting the suction pressure and the exhaust pressure when the compressor to be tested is initially started. In the pressurization operation stage 402, the suction pressure of the compressor to be tested is kept unchanged, and the exhaust pressure is gradually increased to reach the exhaust pressure threshold 400 required by the test. Next, in the load operation stage 403, the suction pressure is kept unchanged, and the discharge pressure is kept unchanged, for example, the discharge pressure is stabilized at 2.0Mpa, so that the compressor to be tested is in the load operation condition with constant discharge pressure, so as to acquire and obtain accurate operation parameters of the compressor to be tested. The duration of the load phase 403 is determined by the test requirements to ensure that the exact parameters of the compressor under test can be acquired. After sampling is completed, the pressure relief stage 404 is entered, and the exhaust pressure is reduced to zero to complete a round of testing.
Fig. 5 shows a control schematic diagram of a load operation stage in the embodiment, and referring to fig. 5, under the combined action of a regulated power supply 11, an air suction pressure stabilizing assembly 12 and an air exhaust pressure stabilizing assembly 13, the compressor 2 to be detected receives a stable input voltage, maintains a stable air suction pressure and an air exhaust pressure, is in a load operation condition with a constant air exhaust pressure, and acquires multiple sets of operation parameters of the compressor 2 to be detected under the load operation condition through an acquisition device 14, so as to realize accurate detection of the compressor 2 to be detected. The acquisition device 14 adopts a multi-sampling and integrating manner to finally compare and acquire an accurate detection result.
Based on the compressor online detection equipment described in any of the above embodiments, the invention also provides a compressor online detection method. Fig. 6 shows the main steps of the online detection method for the compressor in the embodiment, and referring to fig. 6, the online detection method for the compressor in the embodiment includes: in step S610, outputting a predetermined voltage to the compressor to be tested by the regulated power supply; in step S620, adjusting the suction pressure of the compressor to be tested to a preset suction pressure value through the suction pressure stabilizing assembly; in step S630, the exhaust pressure of the compressor to be tested is adjusted to a preset exhaust pressure value by the exhaust pressure stabilizing assembly, so that the compressor to be tested enters a load operation stage in which the exhaust pressure is constant; and in step S640, acquiring the operation parameters of the compressor to be detected in the load operation stage by the acquisition device, so as to obtain the detection result of the compressor to be detected.
The steps S610 to S640 can be respectively implemented by a voltage stabilizing power supply, an air suction voltage stabilizing component, an air exhaust voltage stabilizing component and a collecting device of the compressor online detection device, and reference can be specifically made to the description of the compressor online detection device, and a repeated description is not repeated here.
By adopting the online detection equipment for the compressor, tests show that the online detection quality, precision and efficiency of the compressor are greatly improved. In the aspect of quality, according to the statistical result of process detection, the detection capacity of the online compressor detection equipment is improved by 23.5% in half a year, and many compressor products with poor judgment cannot be detected in the traditional test equipment. The investigation of disintegration of poor compressor products also proves the poor phenomena and reasons of the products, greatly helps to improve the product quality and increase the product improvement opportunities. In the aspect of precision, according to the statistical result of a certain model sampling test, the qualified compressor product is tested by adopting the compressor online detection equipment within half a year, the power test meets the design standard, and the average value reaches 99.5 percent, so that the performance of the compressor product is ensured to completely meet the energy efficiency control requirement. In the aspect of efficiency, the online compressor detection equipment is adopted, the test beat is shortened to 12 s/machine on the basis of 16 s/machine of the traditional test equipment, and the test efficiency is improved by 25%; the number of testers is reduced by 1/shift, the requirement of online detection of the compressor is completely met, and the economic benefit is improved.
In conclusion, the online detection equipment and the detection method for the compressor realize controllable power supply through the voltage-stabilized power supply, purify power supply input and avoid power grid fluctuation interference; the air suction pressure of the compressor to be tested is adjusted through the air suction pressure stabilizing assembly, so that the air suction pressure is kept stable, and the running parameters of the compressor to be tested in the load running stage are ensured to be kept stable and accurate; the exhaust pressure of the compressor to be tested is adjusted through the exhaust pressure stabilizing assembly, so that the compressor to be tested keeps constant exhaust pressure according to test requirements, the acquisition device can acquire the operation parameters of the compressor to be tested at a load operation stage, the sampling time is long, the sampling data is sufficient, the acquired operation parameters are stable and accurate, the flexible, stable and accurate detection of the operation parameters of the compressor to be tested is realized, and the test requirements are met.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (11)
1. An online detection device for a compressor, comprising:
the stabilized voltage power supply is connected with the compressor to be tested;
the air suction pressure stabilizing assembly is connected in an air suction pipeline of the compressor to be detected and is used for adjusting the air suction pressure of the compressor to be detected;
the exhaust pressure stabilizing assembly is connected in an exhaust pipeline of the compressor to be tested and used for adjusting the exhaust pressure of the compressor to be tested so that the compressor to be tested has a load operation stage with constant exhaust pressure; and
and the acquisition device is connected with the compressor to be detected and used for acquiring the operation parameters of the compressor to be detected in the load operation stage.
2. The compressor on-line measuring device of claim 1, wherein the suction pressure stabilizing assembly comprises:
the suction pressure sensor is connected with the suction end of the compressor to be detected and used for detecting the suction pressure of the compressor to be detected;
and the air suction pressure regulating valve is arranged at the upstream of the air suction pressure sensor and used for regulating the air suction pressure according to the detection of the air suction pressure sensor.
3. The online compressor detection device as claimed in claim 2, wherein the suction pressure stabilizing assembly further comprises a pressure reducing valve disposed at an inlet end of the suction line and upstream of the suction pressure regulating valve, the pressure reducing valve being configured to regulate a pressure of an air source delivered to the suction line;
the pressure reducing valve is also in communication connection with the air suction pressure sensor so as to adjust the air source pressure according to the detection of the air suction pressure sensor.
4. The compressor on-line detection device of claim 3, wherein the suction pressure stabilizing assembly further comprises a buffer storage device disposed between the pressure reducing valve and the suction pressure regulating valve, the buffer storage device being used for regulating the flow rate of the gas in the suction pipeline.
5. The compressor on-line measuring device of claim 3, wherein the suction pressure stabilizing assembly further comprises:
the low-pressure control device is arranged at the inlet end of the air suction pipeline and is positioned at the upstream of the pressure reducing valve, and the low-pressure control device is used for giving an alarm when the air source pressure is smaller than the lowest threshold value;
and the filter is arranged between the suction pressure sensor and the suction end of the compressor to be detected and is used for filtering the suction gas of the compressor to be detected.
6. The compressor on-line detection apparatus of claim 1, wherein the discharge pressure stabilizing assembly comprises:
the exhaust pressure sensor is connected with the exhaust end of the compressor to be detected and is positioned in a main path of the exhaust pipeline, and the exhaust pressure sensor is used for detecting the exhaust pressure of the compressor to be detected;
the backpressure valve is arranged at the downstream of the exhaust pressure sensor and is positioned in a pressure stabilizing branch of the exhaust pipeline, and the backpressure valve is used for adjusting the exhaust pressure according to the detection of the exhaust pressure sensor.
7. The compressor on-line detection apparatus according to claim 6, wherein the exhaust pressure stabilizing assembly further comprises a plurality of sets of boosting devices disposed downstream of the exhaust pressure sensor and in the main path, each set of boosting devices comprising a boosting tank and a boosting valve.
8. The online compressor detection device according to claim 7, wherein the exhaust pressure stabilizing assembly further comprises at least one pressure relief valve disposed downstream of the pressure boosting device, each pressure relief valve being disposed in a pressure relief branch of the exhaust line, the pressure relief branch being connected in parallel with the pressure stabilizing branch.
9. The compressor on-line detection apparatus of claim 6, wherein the exhaust pressure stabilizing assembly further comprises:
the temperature control device is connected with the exhaust end of the compressor to be tested and is positioned at the upstream of the exhaust pressure sensor, and the temperature control device is used for giving an alarm when the exhaust temperature of the compressor to be tested is greater than a maximum temperature threshold;
and the high-pressure control device is arranged between the temperature control device and the exhaust pressure sensor and is used for giving an alarm when the exhaust pressure is greater than the highest pressure threshold value.
10. The compressor on-line detection device as claimed in claim 1, wherein the collecting means comprises:
the air suction detection device is connected with the air suction end of the compressor to be detected and is used for detecting and collecting air suction parameters of the compressor to be detected;
the exhaust detection device is connected with the exhaust end of the compressor to be detected and is used for detecting and collecting the exhaust parameters of the compressor to be detected; and
and the calculating device is used for obtaining the detection result of the compressor to be detected according to the air suction parameter and the air exhaust parameter.
11. An online detection method for a compressor, which is based on the online detection device for a compressor according to any one of claims 1 to 10, and comprises the following steps:
outputting a preset voltage to the compressor to be tested through the stabilized voltage power supply;
adjusting the suction pressure of the compressor to be tested to a preset suction pressure value through the suction pressure stabilizing assembly;
adjusting the exhaust pressure of the compressor to be tested to a preset exhaust pressure value through the exhaust pressure stabilizing assembly, so that the compressor to be tested enters a load operation stage with constant exhaust pressure; and
and acquiring multiple groups of operation parameters of the compressor to be detected in the load operation stage through the acquisition device to obtain a detection result of the compressor to be detected.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114352515A (en) * | 2022-02-10 | 2022-04-15 | 珠海凌达压缩机有限公司 | Compression test equipment and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352515A (en) * | 2022-02-10 | 2022-04-15 | 珠海凌达压缩机有限公司 | Compression test equipment and method |
| CN114352515B (en) * | 2022-02-10 | 2023-11-10 | 珠海凌达压缩机有限公司 | Compression test equipment and method |
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