CN110067767B - Method and device for monitoring state of centrifugal compressor unit - Google Patents
Method and device for monitoring state of centrifugal compressor unit Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
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Abstract
The application discloses a method and a device for monitoring the state of a centrifugal compressor unit, relates to the technical field of centrifugal compressor units, and can solve the problems that when the state of the centrifugal compressor unit is monitored, the effective data screening difficulty is high, and targeted monitoring cannot be performed. The method comprises the following steps: dividing the working stage of the centrifugal compressor unit according to the type of a prime mover of the centrifugal compressor unit; configuring corresponding sampling periods for the working phases; and recording the state monitoring data of the centrifugal compressor unit in each working stage by utilizing the sampling period so as to realize the state monitoring of the centrifugal compressor unit. The method is suitable for monitoring the state of the centrifugal compressor unit.
Description
Technical Field
The application relates to the technical field of centrifugal compressor units, in particular to a method and a device for monitoring the state of a centrifugal compressor unit.
Background
The centrifugal compressor unit generally includes a prime mover, a transmission and a centrifugal compressor, and the condition monitoring signals include a bearing temperature signal, a bearing vibration signal (including a frequency doubling signal and a frequency doubling signal), a bearing displacement signal, a unit key phase signal, and the like, and all the signals can be collectively referred to as a shafting signal of the centrifugal compressor unit. When the centrifugal compressor unit is operated or started and stopped, the state monitoring system used as the centrifugal compressor unit needs to record at any time so as to diagnose and analyze the state of the unit.
The traditional method for monitoring data of the centrifugal compressor unit generally records state monitoring signals of all the centrifugal compressor units through a certain sampling period.
However, in the method for monitoring the whole operation process of the centrifugal compressor unit by using one sampling period, if the sampling period is set to be smaller, although the monitored data is detailed, the difficulty of screening the effective data is invisibly increased, the effective data can not be screened when an accident occurs, and the sampling load of the system is also increased; if the sampling period is set to be longer, although the sampling load of the system is reduced, the condition that all effective data can be monitored when an accident happens cannot be guaranteed, and the targeted detection cannot be carried out.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for monitoring a state of a centrifugal compressor unit, and mainly aims to solve the problem that when the state of the centrifugal compressor unit is monitored, the difficulty of screening effective data is high, and targeted monitoring cannot be performed.
According to one aspect of the present application, there is provided a method of centrifugal compressor train condition monitoring, the method comprising:
dividing the working stage of the centrifugal compressor unit according to the type of a prime mover of the centrifugal compressor unit;
configuring corresponding sampling periods for the working phases;
and recording the state monitoring data of the centrifugal compressor unit in each working phase by utilizing the sampling period so as to monitor the state of the centrifugal compressor unit.
According to another aspect of the present application, there is provided an apparatus for condition monitoring of a centrifugal compressor package, the apparatus comprising:
the dividing module is used for dividing the working stage of the centrifugal compressor unit according to the type of a prime motor of the centrifugal compressor unit;
the configuration module is used for configuring corresponding sampling periods for the working phases;
and the recording module is used for recording the state monitoring data of the centrifugal compressor unit in each working stage by utilizing the sampling period so as to monitor the state of the centrifugal compressor unit.
According to a further aspect of the application, a non-transitory readable storage medium is provided, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the above-mentioned method of monitoring the condition of a centrifugal compressor package.
According to yet another aspect of the present application, there is provided a computer device comprising a non-volatile readable storage medium, a processor and a computer program stored on the non-volatile readable storage medium and executable on the processor, the processor implementing the above method of monitoring the condition of a centrifugal compressor package when executing the program.
Borrow by above-mentioned technical scheme, the centrifugal compressor unit state monitoring's that this application provided method and device compares with the mode of the general state monitoring signal of all centrifugal compressor units of record through certain sampling period at present, but the operating condition that this application real-time analysis centrifugal compressor unit contains, divides the different working phases of centrifugal compressor unit according to the prime mover type, for different working phases configuration different sampling periods, utilizes the sampling period record the state monitoring data of centrifugal compressor unit in each working phase to the realization is to the monitoring of centrifugal compressor unit state. Therefore, the recording of the effective data can be pertinently completed, the difficulty of screening the effective data is reduced, and more effective, more reliable and more detailed data support is provided for engineers to carry out fault diagnosis and state analysis.
The above description is only an outline of the technical solution of the present application, and the present application can be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below so that the above and other objects, features, and advantages of the present application can be more clearly understood.
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The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application to the disclosed embodiment. In the drawings:
FIG. 1 is a schematic flow chart illustrating a method for monitoring the condition of a centrifugal compressor unit according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating another method for monitoring the condition of a centrifugal compressor package according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram illustrating a device for monitoring the condition of a centrifugal compressor unit according to an embodiment of the present application;
fig. 4 shows a schematic structural diagram of another device for monitoring the condition of a centrifugal compressor set provided by the embodiment of the application.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Aiming at the problems that effective data screening difficulty is high and targeted monitoring cannot be performed when the state of a centrifugal compressor unit is monitored at present, the embodiment provides a method for monitoring the state of the centrifugal compressor unit, and as shown in fig. 1, the method comprises the following steps:
101. and dividing the working stage of the centrifugal compressor unit according to the type of the prime mover of the centrifugal compressor unit.
For this embodiment, in a specific application scenario, the monitoring of the operation state of the centrifugal compressor set is generally divided into three processes, i.e., a start-up process, an operation process, a stop process, and the like. The starting process and the stopping process corresponding to different prime motor types are different, and therefore the working stages of the divided centrifugal compressor units are different.
The execution main body of the embodiment can be a server for recording the state monitoring data of the centrifugal compressor unit, and the state monitoring data under different working stages can be acquired by utilizing the sampling period, so that data support is provided for state analysis.
102. And configuring corresponding sampling periods for each working phase.
For this embodiment, in a specific application scenario, the sampling period of each stage may be set according to actual requirements, wherein a smaller setting of the sampling period represents more detailed recorded state monitoring data. For example, according to the working attributes in different working phases and the importance of the monitoring data corresponding to different working phases, a corresponding sampling period can be preconfigured for the working phase requiring state monitoring, and the sampling period can be deleted or not set for the working phase not requiring state monitoring. Therefore, the state monitoring data of the centrifugal compressor set can be recorded in a targeted manner.
103. And recording the state monitoring data of the centrifugal compressor unit in each working stage by utilizing the sampling period so as to monitor the state of the centrifugal compressor unit.
For example, if the working phase of the current operation of the centrifugal compressor unit is analyzed as the impulse phase when the type of the prime mover is the steam turbine, a sampling period preset in the impulse phase can be obtained, and the state of the centrifugal compressor unit in the impulse phase is monitored by using the sampling period.
Compared with the prior art, the method for monitoring the state of the centrifugal compressor unit provided by the embodiment can analyze the working state of the centrifugal compressor unit in real time, divide different working stages of the centrifugal compressor unit according to the type of the prime motor, configure different sampling periods for the different working stages, and record the state monitoring data of the centrifugal compressor unit in each working stage by using the sampling periods so as to monitor the state of the centrifugal compressor unit. Therefore, the recording of the effective data can be pertinently completed, when an emergency occurs, the relevant data information is convenient to find, the difficulty of screening the effective data is reduced, and more effective, more reliable and more detailed data support is provided for an engineer to carry out fault diagnosis and state analysis.
Further, as a refinement and an extension of the specific implementation of the above embodiment, in order to illustrate the specific implementation process of the above embodiment, this embodiment provides another method for monitoring the condition of a centrifugal compressor set, as shown in fig. 2, the method includes:
201. and dividing the working stage of the centrifugal compressor unit according to the type of the prime mover of the centrifugal compressor unit.
As a preferable mode, step 201 may specifically include: if the prime mover type is a steam turbine, the working stages are divided into a rush-rotation stage, a warm-up stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage of entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a speed reduction stage, a transcritical stage, a speed re-reduction stage, a steady state stage and a parking stage;
as a preferable mode, step 201 may further include: if the prime mover type is a variable frequency motor or a hydraulic coupler is used as a transmission device, the working stages are divided into a rush-to-turn stage, a steady-state stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage, a steady-state stage and a parking stage;
as a preferable mode, the step 201 may further include dividing the working phase into a rush-rotation phase, an acceleration phase, a transcritical phase, a reacceleration phase, a working constant-speed phase, an operation phase, a fault parking phase or a normal parking phase if the type of the prime mover is a constant-speed motor, where the normal parking phase includes a deceleration phase, a transcritical phase, a re-deceleration phase and a parking phase.
The above three prime mover types are taken as application example scenarios of the present solution, but the present invention is not limited to the above three cases, and may also include various cases of selecting other prime movers, which are not listed here. Wherein, the prime mover characteristics of selecting are different, and the working stage of the centrifugal compressor unit that divides also has the difference.
202a, configuring independent sampling periods for each working phase respectively.
For the embodiment, each independent sampling period can be preset according to actual conditions, and the smaller the set sampling period is, the more detailed the monitored state monitoring data is; therefore, the sampling load of the system can be reduced by setting a larger sampling period for a certain working phase.
For example, taking a centrifugal compressor unit taking a steam turbine as a prime mover as an example, the divided working stages are a rush-rotation stage, a warm-up stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage entering an operation rotating speed region, an operation stage, a fault stop stage, a deceleration stage, a transcritical stage, a re-deceleration stage, a steady-state stage and a stop stage. Before monitoring the state of the centrifugal compressor unit, independent sampling periods need to be configured for the working stages in advance, and the size of the sampling period can be customized by a user or set directly according to default values of the sampling period.
The signal attributes comprise a bearing temperature signal, a bearing vibration signal, a bearing displacement signal and a unit key phase signal, and the bearing vibration signal comprises a frequency doubling signal and a frequency doubling signal.
For example, based on the example of step 202a, taking the centrifugal compressor unit using the steam turbine as the prime mover as an example, before the condition monitoring of the centrifugal compressor unit, independent sampling periods need to be configured for the bearing temperature signal, the bearing vibration frequency-doubled signal and frequency-doubled signal, the bearing displacement signal, and the unit key phase signal in each working phase in advance, and the size of the sampling period may be customized by the user or directly set according to the default value of the sampling period.
For this embodiment, in a specific application scenario, in order to achieve targeted recording of state monitoring data of a centrifugal compressor unit and reduce workload of data monitoring, a target working phase that needs to be subjected to state monitoring can be screened in advance from a plurality of working phases, so as to filter some working phases that are not significant to data monitoring, a corresponding sampling period is configured for each target working phase, so as to perform state monitoring, and the sampling period can refer to the above two manners, that is, according to different working phases of the centrifugal compressor unit, state monitoring data of the centrifugal compressor unit is recorded at different sampling periods or different sampling intervals; and different sampling periods of the state monitoring data of the centrifugal compressor unit can be set according to the signal attributes of different monitoring points of the centrifugal compressor unit. Therefore, the condition monitoring data can be recorded in a targeted mode, and more effective, reliable and detailed data support is provided for engineer fault diagnosis and condition analysis.
In a specific application scenario, as an optimal mode, when a centrifugal compressor unit uses a constant-speed motor as a prime mover, the start-up and normal shutdown times are short, and in order to avoid frequent switching of sampling periods, in addition to the above two methods for configuring sampling periods, an optimal mode applied in a specific scenario is provided, which includes: if the prime mover type is determined to be a constant-rotating-speed motor, uniformly configuring a rush-rotation stage, an acceleration stage, a transcritical stage, a reacceleration stage and a working constant-rotating-speed stage which are included in the starting process as a first preset sampling period; if the prime mover type is determined to be a constant-speed motor, uniformly configuring a deceleration stage, a transcritical stage, a re-deceleration stage and a parking stage which are contained in the normal parking stage into a second preset sampling period.
The numerical values of the first preset sampling period and the second preset sampling period can be customized according to actual conditions.
When the sampling period configuration method is applied to the situation that the time interval between the start-up and the normal stop is short, the same sampling period can be respectively configured for different working stages in the start-up process and the normal stop process in the specific configuration scene of the sampling period, so that the frequent conversion of the sampling period is effectively avoided, and the working efficiency is improved.
203a, recording the state monitoring data of the centrifugal compressor unit by using the sampling period in each working phase determined by the time difference delta T.
For this embodiment, a plurality of independent time differences Δ T may be configured as a sampling period, only one independent sampling period may be included in the same working phase, and a plurality of independent sampling periods divided according to different signal attributes may also be included. When the working stage of the current operation of the centrifugal compressor unit is determined, the state monitoring data of the centrifugal compressor unit can be monitored and recorded according to the time difference delta T correspondingly configured in the working stage.
For example, taking a steam turbine as an example of a prime mover of a centrifugal compressor unit, when only one independent sampling period is set in the same working stage, for example, the set time of different stages of the starting process of the centrifugal compressor unit is respectively: the operating speed region was entered after 3 minutes of kick-up setting, 120 minutes of warm-up setting, 5 minutes of acceleration setting, 1 minute of transcritical setting, and 4 minutes of further acceleration setting. From zero timing, at 0 to 3 minutes, the sampling period of the shafting signal can be set to be 100 milliseconds; when the time is 3 minutes to 123 minutes, the shafting signal sampling period of the centrifugal compressor unit can be set to be delta T10 seconds; when the time is from 123 minutes to 128 minutes, the sampling period of a shafting signal of the centrifugal compressor unit can be set to be delta T1 second; when the time is 128 minutes to 129 minutes, the sampling period of a shafting signal of the centrifugal compressor unit can be set to be delta T100 milliseconds; from 129 minutes to 133 minutes, the shafting signal sampling period of the centrifugal compressor unit can be set to be 1 second. During the operation of the centrifugal compressor unit, a shafting signal sampling period of the centrifugal compressor unit may be set to Δ T1 second, which is determined according to the operation condition. When the shutdown process of the centrifugal compressor unit is fault shutdown, if the fault shutdown time of the centrifugal compressor unit is set to be 5 minutes, the state monitoring data record of the centrifugal compressor unit can be set to be recorded from zero time when the centrifugal compressor unit is in fault shutdown, and the shafting signal sampling period of the centrifugal compressor unit can be set to be 100 milliseconds at 0-5 minutes. If the centrifugal compressor unit is normally stopped in the stopping process, the set time of the centrifugal compressor unit in different stages in the stopping process is respectively as follows: 4 minutes for deceleration, 1 minute for transcritical setting, 5 minutes for further deceleration, 3 minutes for steady state setting, and 2 minutes for stop setting. The state monitoring data record of the centrifugal compressor unit can be set to be recorded from zero when the centrifugal compressor unit is normally stopped, and the sampling period of a shafting signal of the centrifugal compressor unit can be set to be 1 second when the time is 0 to 4 minutes; when the time is 4 minutes to 5 minutes, the sampling period of a shafting signal of the centrifugal compressor unit can be set to be 100 milliseconds; when the time is 5 minutes to 10 minutes, the shafting signal sampling period of the centrifugal compressor unit can be set to be delta T1 second; when the time is 10 minutes to 13 minutes, the sampling period of a shafting signal of the centrifugal compressor unit can be set to be delta T10 seconds; in 13 minutes to 15 minutes, the sampling period of the shafting signal of the centrifugal compressor unit can be set to be 1 second.
For another example, taking the impulse phase when the centrifugal compressor unit uses the steam turbine as the prime mover and the time difference Δ T as the sampling period as an example, when different sampling periods of the state monitoring data of the centrifugal compressor unit are set according to the attributes of different monitoring points of the centrifugal compressor unit, for example, 0 to 3 minutes is the impulse phase, the sampling period of the bearing temperature signal of the centrifugal compressor unit may be set to Δ T1 second, the sampling period of the bearing vibration signal of the centrifugal compressor unit (including the first frequency multiplication signal and the second frequency multiplication signal) may be set to Δ T100 milliseconds, the sampling period of the bearing displacement signal of the centrifugal compressor unit may be set to Δ T100 milliseconds, and the sampling period of the key phase signal of the centrifugal compressor unit may be set to Δ T100 milliseconds.
And a step 203b parallel to the step 203a, recording the state monitoring data of the centrifugal compressor unit by using the sampling period in each working phase determined by the rotating speed difference delta RPM.
For this embodiment, a plurality of independent rotation speed differences Δ RPM may be configured as a sampling period, only one independent sampling period may be included in the same working phase, and a plurality of independent sampling periods divided according to different signal attributes may be further included. When the current operating working stage of the centrifugal compressor unit is determined, the state monitoring data of the centrifugal compressor unit can be monitored and recorded according to the rotating speed difference delta RPM correspondingly configured in the working stage.
For example, when a variable frequency motor is used as a prime mover or a hydraulic coupler is used as a transmission device, and only one independent sampling period is included in the same working stage, if the set rotation speeds in different stages of the starting process of the centrifugal compressor unit are: the driving stage is set to be 0RPM to 200RPM, the steady state stage is set to be 1000RPM, the acceleration stage is set to be 1000RPM to 3000RPM, the transcritical stage is set to be 3000RPM to 5000RPM, and the re-acceleration stage is set to be 5000RPM to 7000RPM and then enters the operating rotating speed region to be 7000RPM to 11000 RPM. The sampling interval of the rush-rotation stage can be set to be equal to 1 in delta RPM; the sampling interval in the steady state phase may be set to Δ RPM — 2; the sampling interval of the acceleration phase can be set to be 4 at Δ RPM; the sampling interval of the transcritical stage can be set to be 10 at Δ RPM; the sampling interval for the reacceleration phase may be set to Δ RPM 4. During the operation of the centrifugal compressor unit, the rotation speed of the centrifugal compressor unit is below the rated rotation speed and the rotation speed of the centrifugal compressor unit is above the rated rotation speed. When 7000RPM to 10000RPM is used, the rotating speed of the centrifugal compressor unit is below rated rotating speed (10000RPM), the sampling interval can be set as 5 at the time of the 10000RPM to 11000RPM, the rotating speed of the centrifugal compressor unit is above the rated rotating speed (10000RPM), the sampling interval can be set as 2 at the time of the 10000RPM, when the stopping process of the centrifugal compressor unit is normal stopping, the process is divided into stages of speed reduction, overcritical, re-speed reduction, steady state, stopping and the like, the setting time of different stages of the normal stopping process of the centrifugal compressor unit is different, for example, the speed reduction stage is set to 7000RPM to 5000RPM, the overcritical stage is set to 5000RPM to 3000RPM, the re-speed reduction stage is set to 3000RPM, the steady state stage is set to 1000RPM, the stopping stage is set to 200RPM to 0RPM, and the sampling interval of the speed reduction stage is set as 10 at the time of the RPM; the sampling interval of the transcritical phase can be set to be equal to 20 at Δ RPM; the sampling interval of the re-deceleration stage can be set to be 10 at Δ RPM; the sampling interval in the steady state phase may be set to Δ RPM as 10; the sampling interval for the parking phase may be set to Δ RPM 10.
For another example, when an inverter motor is used as a prime mover or a hydraulic coupler is used as a transmission, and a starting process is performed when a rotational speed difference Δ RPM is used as a sampling period, when different sampling periods of state monitoring data of the centrifugal compressor unit are set according to attributes of different monitoring points of the centrifugal compressor unit, at a flushing stage of 0RPM to 200RPM, a sampling interval of a bearing temperature signal of the centrifugal compressor unit may be set to Δ RPM 5, a sampling interval of a bearing vibration signal (including a frequency doubling signal and a frequency doubling signal) of the centrifugal compressor unit may be set to Δ RPM 1, a sampling interval of a bearing displacement signal of the centrifugal compressor unit may be set to Δ RPM 1, and a sampling interval of a key phase signal of the centrifugal compressor unit may be set to Δ RPM 1; in a steady state stage of 200RPM to 1000RPM, a sampling interval of a bearing temperature signal of the centrifugal compressor set may be set to Δ RPM equal to 10, a sampling interval of a bearing vibration signal of the centrifugal compressor set (including a frequency doubling signal and a frequency doubling signal) may be set to Δ RPM equal to 5, a sampling interval of a bearing displacement signal of the centrifugal compressor set may be set to Δ RPM equal to 5, and a sampling interval of a key phase signal of the centrifugal compressor set may be set to Δ RPM equal to 5; in an acceleration stage of 1000RPM to 3000RPM, a sampling interval of a bearing temperature signal of a centrifugal compressor set may be set to Δ RPM equal to 10, a sampling interval of a bearing vibration signal of the centrifugal compressor set (including a frequency doubling signal and a frequency doubling signal) may be set to Δ RPM equal to 5, a sampling interval of a bearing displacement signal of the centrifugal compressor set may be set to Δ RPM equal to 5, and a sampling interval of a key phase signal of the centrifugal compressor set may be set to Δ RPM equal to 5; in the overcritical stage of 3000RPM to 5000RPM, the sampling interval of the temperature signal of the bearing of the centrifugal compressor set may be set to Δ RPM 40, the sampling interval of the vibration signal of the bearing of the centrifugal compressor set (including a frequency doubling signal and a frequency doubling signal) may be set to Δ RPM 10, the sampling interval of the displacement signal of the bearing of the centrifugal compressor set may be set to Δ RPM 10, and the sampling interval of the key phase signal of the centrifugal compressor set may be set to Δ RPM 10; in the reacceleration stage of 5000RPM to 7000RPM, the sampling interval of the temperature signal of the bearing of the centrifugal compressor set may be set to Δ RPM 10, the sampling interval of the vibration signal (including the frequency doubling signal and the frequency doubling signal) of the bearing of the centrifugal compressor set may be set to Δ RPM 5, the sampling interval of the displacement signal of the bearing of the centrifugal compressor set may be set to Δ RPM 5, and the sampling interval of the key phase signal of the centrifugal compressor set may be set to Δ RPM 5.
And a step 203c parallel to the step 203a, recording the state monitoring data of the centrifugal compressor unit by using the sampling periods in each working phase determined by the time difference delta T and/or the rotating speed difference delta RPM.
In a specific application scenario, in order to make the data monitoring more suitable for the requirement of accuracy, as a preferred mode, step 203c may specifically include: analyzing the current working stage of the operation of the centrifugal compressor unit in real time; if the current working stage is determined to be a warming-up stage or a steady-state stage, determining a sampling period in the current working stage by using the time difference delta T; if the current working stage is determined to be the operation stage and the prime mover type is a steam turbine or a variable frequency motor or a hydraulic coupler is used as a transmission device, determining a sampling period in the current working stage by using a rotation speed difference delta RPM; if the current working stage is determined to be the running stage and the prime motor type is the constant-speed motor, determining a sampling period in the current working stage by using the time difference delta T; and if the current working stage is determined to be in a non-warming stage, a non-steady state stage and a non-running stage, determining the sampling period in the current working stage by using the time difference delta T or the rotating speed difference delta RPM.
For this embodiment, in a specific application scenario, the working phase of the current operation of the centrifugal compressor unit needs to be monitored in real time, so as to adjust and convert the sampling period, so as to obtain the sampling record of the state monitoring data according to the preset sampling frequency.
In a specific application scenario, the method for analyzing the current operating stage of the centrifugal compressor unit in real time can be divided into two analysis modes:
the first analysis mode can judge the current operating working stage of the centrifugal compressor unit according to the time intervals set in different stages. For example, taking a normal shutdown process as an example, when a centrifugal compressor unit uses a variable frequency motor as a prime mover or a hydraulic coupler as a flexible transmission machine, and uses a time difference as a sampling period, time intervals corresponding to different working stages are set as follows: the deceleration stage is set at 0-2 minutes, the transcritical stage is set at 2-3 minutes, the re-deceleration stage is set at 3-5 minutes, the steady-state stage is set at 5-7 minutes, and the stop stage is set at 7-8 minutes. If the time node at which the centrifugal compressor unit is currently located is judged to be 6 minutes, the working stage of the current operation of the centrifugal compressor unit can be judged to be a steady-state stage.
And the second analysis mode can judge the current operating working stage of the centrifugal compressor unit according to the rotating speed intervals set in different stages. For example, also taking a normal shutdown process as an example, when the centrifugal compressor unit uses a variable frequency motor as a prime mover or a hydraulic coupler as a flexible transmission machine, and uses a rotational speed difference as a sampling period, setting the rotational speed intervals corresponding to different working stages as: the speed reduction stage is 7000RPM to 5000RPM, the transcritical stage is 5000RPM to 3000RPM, the re-speed reduction stage is 3000RPM to 1000RPM, the steady-state stage is 1000RPM, and the parking stage is 200RPM to 0 RPM. If the current rotating speed of the centrifugal compressor unit is 2000RPM, the current operating working stage of the centrifugal compressor unit can be determined to be a re-speed reduction stage.
Correspondingly, in order to determine the rotation speed difference Δ RPM as the sampling period according to the working phase, a calculation formula of the sampling period is provided:
wherein S ismaxIs the maximum rotating speed value, SminIs the minimum rotation speed value, K is the regulation coefficient, TrampFor ramp-up time, NtdiThe number of sets of centrifugal compressor sets. If considered in terms of a centrifugal compressor train, the formula can be simplified as:
as can be seen from the above formula, K is used as the adjustment coefficient, and when the centrifugal compressor set is in different working stages, different K and T can be set according to requirementsrampAnd then different rotational speed differences Δ RPM are generated as sampling intervals.
For example, starting from steam turbinesTaking the starting process of the motor and the rotating speed difference delta RPM as the sampling period as an example, the starting process can be obtained according to a formula when the motor and the rotating speed difference delta RPM are in the rush-rotating stage from 0RPM to 200RPM
As shafting signal sampling interval, TrampThe time can be set to 30 seconds, K is set to 170, the sampling interval of the centrifugal compressor unit shafting signal is delta RPM (revolutions per minute) 1, namely, when the rotating speed of the centrifugal compressor unit changes by 1, the centrifugal compressor unit shafting signal monitoring data is recorded once; during the warm-up period from 200RPM to 1000RPM, the formula can be obtained
As shafting signal sampling interval, TrampThe time can be set to 160 seconds, K is set to 240, the sampling interval of the centrifugal compressor unit shafting signal is Δ RPM equal to 2, that is, when the rotating speed of the centrifugal compressor unit changes by 2, the centrifugal compressor unit shafting signal monitoring data is recorded once; in the acceleration stage of 1000RPM to 3000RPM, the formula can be obtained
As shafting signal sampling interval, TrampThe time can be set to 400 seconds, K is set to 100, the sampling interval of the centrifugal compressor unit shafting signal is delta RPM (revolutions per minute) 4, namely, when the rotating speed of the centrifugal compressor unit changes 4, the centrifugal compressor unit shafting signal monitoring data is recorded once; at the over-critical stage of 3000RPM to 5000RPM, the formula can be obtained
As shafting signal sampling interval, TrampThe time can be set to 50 seconds, K is set to 150, the sampling interval of the centrifugal compressor unit shafting signal is delta RPM (revolutions per minute) 10, namely, when the rotating speed of the centrifugal compressor unit changes by 10, the centrifugal compressor unit shafting signal monitoring data is recorded once; during the re-acceleration stage of 5000-7000 RPM, the formula can be obtained
As shafting signal sampling interval, TrampIt can be set to 400 seconds, K is set to 100, and then the sampling interval of the centrifugal compressor unit shafting signal is Δ RPM equal to 4, that is, every 4 changes of the centrifugal compressor unit rotation speed, the centrifugal compressor unit shafting signal monitoring data is recorded once.
By the method for monitoring the state of the centrifugal compressor unit, all working phases contained in the centrifugal compressor unit can be determined according to the type of a prime mover in the centrifugal compressor unit, wherein the working phases comprise an operation phase and a plurality of working phases respectively included in a starting process and a stopping process, and a sampling period is respectively determined in each working phase, wherein in the same working phase, the sampling periods can be set to be the same, and different sampling periods can be set in the same working phase according to signal attributes of different monitoring points; in view of the special circumstances, when the centrifugal compressor unit uses a constant-speed motor as a prime mover, since the time elapsed during start-up and normal shut-down is short, it is also possible to set the same sampling period for a plurality of working phases included in the start-up process and the shut-down process, respectively. In this embodiment, the specific method for setting the sampling period may be: the determination is made by a time difference and/or a rotational speed difference. At this time, three situations are divided, the first is to determine all sampling periods by using the time difference Δ T; secondly, determining all sampling periods by using the rotation speed difference delta RPM; and thirdly, providing a preferable mode for considering special conditions, respectively selecting an optimal sampling period determination mode from the time difference delta T and the rotating speed difference delta RPM according to the characteristics of each working phase, and determining a specific sampling period value for each working phase or each signal attribute so as to realize the monitoring of the state of the centrifugal compressor unit. According to the scheme, different sampling periods are set for data monitoring, so that related data can be conveniently found when a sudden situation occurs, the difficulty in screening effective data is reduced, the sampling load of a system is reduced, and the data monitoring is more targeted.
Further, as a specific embodiment of the method shown in fig. 1 and fig. 2, the present application provides a device for monitoring the condition of a centrifugal compressor set, as shown in fig. 3, the device includes: a dividing module 31, a configuration module 32 and a recording module 33.
A dividing module 31, which is used for dividing the working phase of the centrifugal compressor unit according to the type of the prime mover of the centrifugal compressor unit;
a configuration module 32, configured to configure corresponding sampling periods for each working phase;
and the recording module 33 is configured to record the state monitoring data of the centrifugal compressor unit in each working phase by using the sampling period, so as to perform state monitoring on the centrifugal compressor unit.
In a specific application scenario, in order to provide a specific embodiment for dividing the working phase of the centrifugal compressor unit, the dividing module 31 may be specifically configured to divide the working phase into a rush-rotation phase, a warm-up phase, an acceleration phase, a transcritical phase, a reacceleration phase, a phase of entering an operating speed region, an operating phase, a fault stop phase or a normal stop phase if the prime mover type is a steam turbine, where the normal stop phase includes a deceleration phase, a transcritical phase, a re-deceleration phase, a steady-state phase and a stop phase; if the prime mover type is a variable frequency motor or a hydraulic coupler is used as a transmission device, the working stages are divided into a rush-to-turn stage, a steady-state stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage, a steady-state stage and a parking stage; if the prime motor is a constant-rotating-speed motor, the working stages are divided into a rush-rotation stage, an acceleration stage, a transcritical stage, a reacceleration stage, a working constant-rotating-speed stage, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage and a parking stage.
Accordingly, in order to configure corresponding sampling periods for the working phases, as shown in fig. 4, the configuration module 32 is specifically configured to configure independent sampling periods for the working phases respectively
The configuration module 32 may be further configured to configure independent sampling periods for different signal attributes in each working phase, where the signal attributes include a bearing temperature signal, a bearing vibration signal, a bearing displacement signal, and a unit key phase signal, and the bearing vibration signal includes a frequency doubling signal and a frequency doubling signal;
in a specific application scenario, in order to provide a preferred way of configuring a sampling period, the configuration module 32 may be further configured to uniformly configure a rush-rotation stage, an acceleration stage, a transcritical stage, a reacceleration stage, and a working constant rotation speed stage included in a starting process as a first preset sampling period if it is determined that the prime mover type is a constant rotation speed motor; if the prime mover type is determined to be a constant-speed motor, uniformly configuring a deceleration stage, a transcritical stage, a re-deceleration stage and a parking stage which are contained in the normal parking stage into a second preset sampling period.
Correspondingly, in order to record the state monitoring data of the centrifugal compressor unit by using the sampling period, the recording module 33 is specifically configured to record the state monitoring data of the centrifugal compressor unit by using the sampling period in each working stage determined by the time difference; or recording the state monitoring data of the centrifugal compressor set by utilizing the sampling period in each working stage determined by the rotation speed difference; or recording the state monitoring data of the centrifugal compressor set by utilizing the sampling period in each working stage determined by the time difference and/or the rotating speed difference.
Correspondingly, in order to provide a preferred way of monitoring and recording the condition monitoring data of the centrifugal compressor set, the recording module 33, as shown in fig. 4, specifically includes: an analysis unit 331, a determination unit 332.
The analysis unit 331 is specifically configured to analyze the current working phase of the operation of the centrifugal compressor unit in real time;
the determining unit 332 is specifically configured to determine a sampling period in the current working phase by using the time difference if it is determined that the current working phase is a warm-up phase or a steady-state phase;
the determining unit 332 is further specifically configured to determine a sampling period in the current working phase by using the rotational speed difference if it is determined that the current working phase is the operating phase and the prime mover type is a steam turbine or a variable frequency motor or a hydraulic coupler is used as a transmission device;
the determining unit 332 is further specifically configured to determine a sampling period in the current working phase by using the time difference if it is determined that the current working phase is the operating phase and the prime mover type is the constant-speed motor;
the determining unit 332 may be further specifically configured to determine a sampling period in the current working phase by using the time difference or the rotational speed difference if it is determined that the current working phase is not the warm-up phase, the unsteady state phase, and the non-operating phase.
In a specific application scenario, if the rotation speed difference Δ RPM is used as a sampling period, a calculation formula of the sampling period is as follows:
wherein S ismaxIs the maximum rotating speed value, SminIs the minimum rotation speed value, K is the regulation coefficient, TrampFor ramp-up time, NtdiThe number of sets of centrifugal compressor sets.
It should be noted that other corresponding descriptions of the functional units related to the device for monitoring the state of the centrifugal compressor unit provided in this embodiment may refer to the corresponding descriptions in fig. 1 to fig. 2, and are not repeated herein.
Based on the method shown in fig. 1 and fig. 2, correspondingly, the embodiment of the present application further provides a storage medium, on which a computer program is stored, and the program, when executed by a processor, implements the method for monitoring the condition of the centrifugal compressor set shown in fig. 1 and fig. 2.
Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method of the embodiments of the present application.
Based on the method shown in fig. 1 and fig. 2 and the virtual device embodiment shown in fig. 3 and fig. 4, in order to achieve the above object, an embodiment of the present application further provides a computer device, which may specifically be a personal computer, a server, a network device, and the like, where the entity device includes a storage medium and a processor; a storage medium for storing a computer program; a processor for executing a computer program for implementing the above-described method of monitoring the condition of a centrifugal compressor package as shown in fig. 1 and 2.
Optionally, the computer device may also include a user interface, a network interface, a camera, Radio Frequency (RF) circuitry, sensors, audio circuitry, a WI-FI module, and so forth. The user interface may include a Display screen (Display), an input unit such as a keypad (Keyboard), etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (e.g., a bluetooth interface, WI-FI interface), etc.
It will be understood by those skilled in the art that the computer device structure provided in the present embodiment is not limited to the physical device, and may include more or less components, or combine some components, or arrange different components.
The nonvolatile readable storage medium can also comprise an operating system and a network communication module. The operating system is a program that manages the physical device hardware and software resources for centrifugal compressor unit condition monitoring, supporting the execution of information processing programs as well as other software and/or programs. The network communication module is used for realizing communication among components in the nonvolatile readable storage medium and communication with other hardware and software in the entity device.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus a necessary general hardware platform, and can also be implemented by hardware. By applying the technical scheme, compared with the prior art, the method and the device can determine all working phases contained in the centrifugal compressor unit according to the type of a prime motor in the centrifugal compressor unit, wherein the working phases comprise an operation phase and a plurality of working phases respectively included in a starting process and a stopping process, and a sampling period is respectively determined in each working phase, wherein in the same working phase, the sampling period can be set to be the same, and different sampling periods can be set in the same working phase according to signal attributes of different monitoring points; in view of the special circumstances, when the centrifugal compressor unit uses a constant-speed motor as a prime mover, since the time elapsed during start-up and normal shut-down is short, it is also possible to set the same sampling period for a plurality of working phases included in the start-up process and the shut-down process, respectively. In this embodiment, the specific method for setting the sampling period may be: the determination is made by a time difference and/or a rotational speed difference. At this time, three situations are divided, and the first situation is that all sampling periods are determined by using time difference; secondly, determining all sampling periods by using the rotation speed difference; and thirdly, providing a preferable mode for considering special conditions, selecting an optimal sampling period determination mode from the time difference and the rotating speed difference according to the characteristics of each working stage, and determining a specific sampling period value for each working stage or each signal attribute so as to realize the monitoring of the state of the centrifugal compressor unit. According to the scheme, different sampling periods are set for data monitoring, so that related data can be conveniently found when a sudden situation occurs, the difficulty in screening effective data is reduced, the sampling load of a system is reduced, and the data monitoring is more targeted.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above application serial numbers are for description purposes only and do not represent the superiority or inferiority of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (8)
1. A method of monitoring the condition of a centrifugal compressor package, comprising:
the working phases of the centrifugal compressor unit are divided according to the type of the prime mover of the centrifugal compressor unit, and the working phases comprise: if the prime mover type is a steam turbine, dividing the working stages into a rush-rotation stage, a warm-up stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage of entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage, a steady state stage and a parking stage; if the prime mover is a variable frequency motor or a hydraulic coupler is used as a transmission device, the working stages are divided into a rush-to-turn stage, a steady-state stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage of entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage, a steady-state stage and a parking stage; if the prime mover type is a constant-rotating-speed motor, dividing the working stage into a rush-rotation stage, an acceleration stage, a transcritical stage, a reacceleration stage, a working constant-rotating-speed stage, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage and a parking stage;
configuring a corresponding sampling period for each working phase, including: configuring independent sampling periods for the working phases respectively; or configuring independent sampling periods for different signal attributes in each working phase respectively, wherein the signal attributes comprise a bearing temperature signal, a bearing vibration signal, a bearing displacement signal and a unit key phase signal, and the bearing vibration signal comprises a frequency doubling signal and a frequency doubling signal;
and recording the state monitoring data of the centrifugal compressor unit in each working phase by utilizing the sampling period so as to monitor the state of the centrifugal compressor unit.
2. The method according to claim 1, wherein the configuring of the corresponding sampling period for each of the working phases further includes:
if the prime mover type is determined to be a constant-rotating-speed motor, uniformly configuring the rush-rotation stage, the acceleration stage, the transcritical stage, the reacceleration stage and the working constant-rotating-speed stage which are included in the starting process as a first preset sampling period;
if the prime mover type is determined to be a constant-speed motor, uniformly configuring the speed reduction stage, the transcritical stage, the re-speed reduction stage and the parking stage which are included in the normal parking stage into a second preset sampling period.
3. The method according to claim 2, wherein said recording of condition monitoring data of said centrifugal compressor assembly during each of said operating phases using said sampling period comprises:
recording state monitoring data of the centrifugal compressor set by utilizing the sampling period in each working phase determined by the time difference delta T; or
Recording state monitoring data of the centrifugal compressor set by utilizing a sampling period in each working stage determined by a rotating speed difference delta RPM; or
And recording the state monitoring data of the centrifugal compressor set by utilizing the sampling period in each working phase determined by the time difference delta T and/or the rotating speed difference delta RPM.
4. Method according to claim 3, characterized in that said recording of condition monitoring data of said centrifugal compressor group at sampling periods within each of said operating phases determined by said time difference Δ T and/or said rotational speed difference Δ RPM comprises in particular:
analyzing the current working stage of the operation of the centrifugal compressor unit in real time;
if the current working stage is determined to be a warming-up stage or a steady-state stage, determining a sampling period in the current working stage by using the time difference delta T;
if the current working stage is determined to be an operation stage and the prime mover type is a steam turbine or a variable frequency motor or a hydraulic coupler is used as a transmission device, determining a sampling period in the current working stage by using the rotation speed difference delta RPM;
if the current working stage is determined to be the operation stage and the prime mover type is the constant-speed motor, determining a sampling period in the current working stage by using the time difference delta T;
and if the current working stage is determined to be in a non-warming stage, a non-steady state stage and a non-running stage, determining the sampling period in the current working stage by using the time difference delta T or the rotating speed difference delta RPM.
5. The method according to claim 3, wherein if the rotation speed difference Δ RPM is taken as the sampling period, the sampling period is calculated by the following formula:
wherein S ismaxIs the maximum rotating speed value, SminIs the minimum rotation speed value, K is the regulation coefficient, TrampFor ramp-up time, NtdiThe number of sets of centrifugal compressor sets.
6. An apparatus for centrifugal compressor train condition monitoring, characterized in that it is adapted to perform the method for centrifugal compressor train condition monitoring of any of claims 1 to 5, comprising:
the dividing module is used for dividing the working phase of the centrifugal compressor unit according to the type of a prime motor of the centrifugal compressor unit, and comprises the following steps: if the prime mover type is a steam turbine, dividing the working stages into a rush-rotation stage, a warm-up stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage of entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage, a steady state stage and a parking stage; if the prime mover is a variable frequency motor or a hydraulic coupler is used as a transmission device, the working stages are divided into a rush-to-turn stage, a steady-state stage, an acceleration stage, a transcritical stage, a reacceleration stage, a stage of entering an operation rotating speed area, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage, a steady-state stage and a parking stage; if the prime mover type is a constant-rotating-speed motor, dividing the working stage into a rush-rotation stage, an acceleration stage, a transcritical stage, a reacceleration stage, a working constant-rotating-speed stage, an operation stage, a fault parking stage or a normal parking stage, wherein the normal parking stage comprises a deceleration stage, a transcritical stage, a re-deceleration stage and a parking stage;
the configuration module, configured to configure a corresponding sampling period for each working phase, includes: configuring independent sampling periods for the working phases respectively; or configuring independent sampling periods for different signal attributes in each working phase respectively, wherein the signal attributes comprise a bearing temperature signal, a bearing vibration signal, a bearing displacement signal and a unit key phase signal, and the bearing vibration signal comprises a frequency doubling signal and a frequency doubling signal;
and the recording module is used for recording the state monitoring data of the centrifugal compressor unit in each working stage by utilizing the sampling period so as to monitor the state of the centrifugal compressor unit.
7. A storage device having a computer program stored thereon, wherein the program, when executed by a processor, implements the method of centrifugal compressor package condition monitoring of any one of claims 1 to 5.
8. A centrifugal compressor assembly condition monitoring apparatus comprising a storage device, a processor and a computer program stored on the storage device and executable on the processor, wherein the processor, when executing the program, implements the method of centrifugal compressor assembly condition monitoring as claimed in any one of claims 1 to 5.
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