CN115994414A - Reciprocating compressor operation efficiency calculation method and system based on indicator diagram - Google Patents
Reciprocating compressor operation efficiency calculation method and system based on indicator diagram Download PDFInfo
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Abstract
The invention provides a reciprocating compressor operation efficiency calculation method and a system based on an indicator diagram, wherein the method comprises the following steps: acquiring flywheel phase information of the reciprocating compressor and shaft side and cover side pressure data of each cylinder; outputting a real-time indicator diagram of the unit operation according to the phase information and the pressure data; and obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram. A corresponding terminal and storage medium are also provided. The invention can display the running efficiency of the unit in real time and provide basic data support for the energy efficiency management of the compressor; calculating based on the proportional relation between effective work and ineffective work in each effective compression stroke of the reciprocating compressor, so as to completely avoid various adverse factors of the traditional method; the operation efficiency of the unit can be mastered on line in real time by adopting an online real-time calculation mode, so that the unit is more economical and rapid; the implementation is simple, the modification and destructive modification of the unit are not involved, and the method is safe and reliable.
Description
Technical Field
The invention relates to the technical field of compound compressor operation management, in particular to a reciprocating compressor operation efficiency calculation method and system based on an indicator diagram.
Background
The hydrogen system of petrochemical enterprises is a main oil refining process, the reciprocating hydrogen compressor is one of core equipment, the traditional calculation method of the operation efficiency of the reciprocating compressor is mainly based on the proportional relation between the rated flow and the actual flow of the reciprocating compressor,
the traditional calculation method is seemingly simple, the relation between the rated flow and the design value is difficult to grasp due to the fact that the rated flow changes along with the mechanical performance, the transmission performance, the electric-energy conversion and other factors of the unit in the operation process, and the actual flow of the unit is larger in general deviation due to the problem of metering means, so that the operation efficiency of the compressor cannot be accurately calculated under the actual condition.
Therefore, how to solve the problems that the reciprocating compressor unit is difficult to accurately judge and calculate the operation efficiency, and how to judge the efficiency reduction caused by the aging of related parts in the operation process of the compressor, and further how to solve the problem of high operation energy consumption of the unit, becomes a problem to be solved in the field.
No description or report of similar technology is found at present, and similar data at home and abroad are not collected.
Disclosure of Invention
The invention provides a reciprocating compressor operation efficiency calculating method and system based on an indicator diagram, and provides a corresponding terminal and storage medium.
According to an aspect of the present invention, there is provided a reciprocating compressor operation efficiency calculating method based on an indicator diagram, comprising:
acquiring flywheel phase information of the reciprocating compressor and shaft side and cover side pressure data of each cylinder;
outputting a real-time indicator diagram of the unit operation according to the phase information and the pressure data;
and obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram.
Preferably, the acquiring flywheel phase information of the reciprocating compressor includes:
and loading a phase detection device on the flywheel of the reciprocating compressor, and continuously acquiring a phase pulse signal through the operation of the reciprocating compressor to obtain phase information.
Preferably, the acquiring shaft side and head side pressure data of each cylinder of the compound compressor includes:
and loading pressure detection devices on the shaft measurement side and the cover side of each cylinder of the reciprocating compressor respectively, and continuously acquiring pressure signals to obtain pressure data.
Preferably, the outputting the real-time indicator diagram of the unit operation according to the phase information and the pressure data includes:
according to the phase information, X-axis coordinate data of the flywheel angle corresponding to the position of the compressor piston is obtained, real-time coordinate data of the position of the piston relative to the flywheel angle is continuously output, and the phase position of the X-axis is obtained;
and obtaining pressure data with required density according to the pressure data, taking the pressure data as coordinate data of a Y axis, and outputting a real-time indicator diagram of unit operation corresponding to the phase position of an X axis.
Preferably, obtaining real-time operation efficiency of the unit in different states according to the real-time indicator diagram includes:
the real-time indicator diagram is subjected to block segmentation processing based on an average and edge correction principle;
dividing a plurality of divided areas obtained by dividing into an air inlet pressure range and an air outlet pressure range, and then calculating an effective area and a lost area;
and obtaining the real-time operation efficiency of the reciprocating compressor according to the proportional relation between the effective work area and the lost work area.
Preferably, the real-time indicator diagram is sliced into 500 ten thousand parts.
According to another aspect of the present invention, there is provided an operation efficiency calculating system of a reciprocating compressor based on a diagram, comprising:
the phase detection module is used for acquiring flywheel phase information of the reciprocating compressor;
a pressure detection module for acquiring shaft side and cover side pressure data of each cylinder of the reciprocating compressor;
the indicator diagram construction module outputs a real-time indicator diagram of the unit operation according to the phase information and the pressure data;
and the unit efficiency calculation module is used for obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram.
Preferably, the indicator diagram construction module includes:
a pulse signal processing unit: the unit obtains X-axis coordinate data of the flywheel angle corresponding to the position of the compressor piston according to the phase information, and continuously outputs real-time coordinate data of the position of the piston relative to the flywheel angle, so as to obtain the phase position of the X-axis;
a pressure data processing unit: the unit obtains pressure data of the required density according to the pressure data, and the pressure data is used as coordinate data of a Y axis;
the indicator diagram construction unit: the unit outputs a real-time indicator diagram of the unit operation by corresponding the coordinate data of the Y axis to the phase position of the X axis.
Preferably, the unit efficiency calculation module performs segmentation processing on the real-time indicator diagram, divides a plurality of segmentation areas obtained by segmentation into an effective work area and a loss work area, and obtains the real-time operation efficiency of the reciprocating compressor according to the proportional relation between the effective work area and the loss work area.
According to a third aspect of the present invention there is provided a terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor being operable to perform the method of any one of the preceding claims when executing the program.
According to a fourth aspect of the present invention there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor is operable to perform a method as any one of the above.
Due to the adoption of the technical scheme, compared with the prior art, the invention has at least one of the following beneficial effects:
the method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram can display the operation efficiency of the unit in real time and provide basic data support for energy efficiency management of the compressor.
The method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram realize the energy-saving and high-efficiency operation management of the reciprocating compressor.
The method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram, which are provided by the invention, calculate based on the proportional relation between effective work and ineffective work in each effective compression stroke of the reciprocating compressor, and completely avoid various adverse factors of the traditional method.
The method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram provided by the invention adopt an online real-time calculation mode, can grasp the operation efficiency of a unit online in real time, and are more economical and quicker.
The method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram are simple in implementation, do not involve modification and destructive modification of a unit, and are safe and reliable.
By adopting the method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram, the implementation operation efficiency of the compressor can be accurately calculated, and the accuracy is more than 98%.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
fig. 1 is a flowchart of a method for calculating the operation efficiency of a reciprocating compressor based on an indicator diagram according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to a preferred embodiment of the present invention.
FIG. 3 is a diagram showing the operation of a single flywheel on a single cylinder 360 degrees, i.e. the operation of a piston for one phase cycle, in a preferred embodiment of the present invention.
FIG. 4 is a schematic diagram of the components of the system for calculating the operating efficiency of the reciprocating compressor based on the indicator diagram according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail: the embodiment is implemented on the premise of the technical scheme of the invention, and detailed implementation modes and specific operation processes are given. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the invention.
Fig. 1 is a flowchart of a method for calculating the operation efficiency of a reciprocating compressor based on an indicator diagram according to an embodiment of the present invention.
As shown in fig. 1, the method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram provided in this embodiment may include the following steps:
s100, acquiring flywheel phase information of the reciprocating compressor and shaft side and cover side pressure data of each cylinder;
s200, outputting a real-time indicator diagram of unit operation according to the phase information and the pressure data;
and S300, obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram.
In S100 of this embodiment, as a preferred embodiment, the acquiring flywheel phase information of the reciprocating compressor may include the following steps:
s100a, loading a phase detection device on a flywheel of the reciprocating compressor, and continuously acquiring a phase pulse signal through the operation of the reciprocating compressor to obtain phase information.
In S100 of this embodiment, as a preferred embodiment, the acquiring the shaft side and cover side pressure data of each cylinder of the compound compressor may include the steps of:
and S100b, loading pressure detection devices on the shaft measurement and cover side of each cylinder of the reciprocating compressor respectively, and continuously acquiring pressure signals to obtain pressure data.
In S200 of this embodiment, as a preferred embodiment, the outputting a real-time indicator diagram of the unit operation according to the phase information and the pressure data may include the following steps:
s201, according to the phase information, obtaining X-axis coordinate data of the flywheel angle corresponding to the position of the compressor piston, and continuously outputting real-time coordinate data of the piston position relative to the flywheel angle, namely obtaining the phase position of the X-axis;
s202, obtaining pressure data with enough density according to the pressure data, taking the pressure data as coordinate data of a Y axis, and outputting a real-time indicator diagram of unit operation corresponding to the phase position of an X axis.
In S300 of this embodiment, as a preferred embodiment, according to the real-time indicator diagram, the real-time operation efficiency of the unit in different states may be obtained, which includes the following steps:
s301, performing dicing and segmentation processing on the real-time indicator diagram based on an average and edge correction principle;
s302, dividing a plurality of divided areas obtained by dividing into an air inlet pressure range and an air outlet pressure range, and then calculating an effective work area and a lost work area;
and S303, obtaining the real-time operation efficiency of the reciprocating compressor according to the proportional relation between the effective work area and the lost work area.
In S301 of this embodiment, as a preferred embodiment, the real-time indicator diagram is split into 500 ten thousand parts.
Fig. 2 is a process diagram showing a method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to a preferred embodiment of the present invention.
As shown in fig. 2, the method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to the preferred embodiment may include the following steps:
step 1, loading a phase monitoring device on a flywheel of a reciprocating compressor and loading a pressure monitoring device on a shaft side and a cover side of each cylinder of the compressor respectively, and respectively obtaining phase information and pressure data through operation of the reciprocating compressor;
step 2, transmitting pulse signals of the phase monitoring device to a pulse signal processor, and simultaneously arranging X-axis coordinate data of the flywheel angle (0-360 degrees) corresponding to the position of the compressor piston, and continuously outputting real-time coordinate data of the piston position relative to the flywheel angle as the phase position of the X-axis; on the other hand, the pressure data processor receives high-frequency pressure signals of the shaft side and the cover side of each cylinder, takes pressure data with enough density as coordinate values of the Y axis, and outputs a real-time indicator diagram of unit operation corresponding to the phase position of the X axis.
Step 3, the computing unit executes a computing program, samples the unit indicator diagram in real time, and cuts the indicator diagram into 500 ten thousand parts; the 500 ten thousand cutting areas are divided into the effective work area and the lost work area, and the real-time operation efficiency of the reciprocating compressor can be obtained very quickly and accurately according to the proportional relation between the effective work area and the lost work area. As shown in fig. 3, an indicator diagram of 360 degrees of flywheel operation, i.e. one phase period of piston operation, on one side of a single cylinder is shown.
In general, the accuracy of the graph area of the indicator diagram is over 99 percent by 500 ten thousand parts, and the number of the cut pieces is increased, so that the accuracy is not greatly improved.
In a specific application example of the preferred embodiment, the pulse signal processor is capable of processing the pulse signal with an upper limit value of 16.6 times/second.
In a specific application of the preferred embodiment, the data frequency of the pressure is not less than 60KHZ.
The technical solutions provided in the above embodiments of the present invention are further described below with reference to a specific application example.
According to the calculation theory and the calculation scheme provided by the embodiment of the invention, the DW-6.3 reciprocating air compressor is taken as a blue book, 1 set of phase monitoring device is loaded on a flywheel of the compressor, 1 set of pressure monitoring device is respectively loaded on the shaft side and the cover side of a primary cylinder and a secondary cylinder of the unit, the compressor runs between 300-1000 revolutions per minute through a frequency conversion device, phase signal monitoring can accurately and continuously record phase information, and indicator diagrams are displayed in real time in different rotating speed processes according to the pressure values of the pressure monitoring devices, when the parts which mainly affect the efficiency of the unit run with faults, the indicator diagrams change differently, and the calculation unit can accurately calculate the real-time running efficiency of the unit in different states.
Another embodiment of the present invention provides an operation efficiency calculating system of a reciprocating compressor based on an indicator diagram, as shown in fig. 4, which may include: the system comprises a phase detection module, a pressure detection module, an indicator diagram construction module and a unit efficiency calculation module.
Wherein:
the phase detection module is used for acquiring flywheel phase information of the reciprocating compressor;
a pressure detection module for acquiring shaft side and cover side pressure data of each cylinder of the reciprocating compressor;
the indicator diagram construction module outputs a real-time indicator diagram of the unit operation according to the phase information and the pressure data;
and the unit efficiency calculation module is used for obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram.
As a preferred embodiment of this embodiment, the indicator diagram construction module includes:
a pulse signal processing unit: the unit obtains X-axis coordinate data of the flywheel angle corresponding to the position of the compressor piston according to the phase information, and continuously outputs real-time coordinate data of the position of the piston relative to the flywheel angle, so as to obtain the phase position of the X-axis;
a pressure data processing unit: the unit obtains pressure data of the required density according to the pressure data, and the pressure data is used as coordinate data of a Y axis;
the indicator diagram construction unit: the unit outputs a real-time indicator diagram of the unit operation by corresponding the coordinate data of the Y axis to the phase position of the X axis.
As a preferred embodiment of this embodiment, the unit efficiency calculation module performs a segmentation process on the real-time indicator diagram, and divides a plurality of segmentation areas obtained by segmentation into an effective work area and a lost work area, and obtains the real-time operation efficiency of the reciprocating compressor according to the proportional relationship between the effective work area and the lost work area.
A third embodiment of the invention provides a terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor being operable to perform the method of any of the above embodiments of the invention when the program is executed.
Optionally, a memory for storing a program; memory, which may include volatile memory (english) such as random-access memory (RAM), such as static random-access memory (SRAM), double data rate synchronous dynamic random-access memory (Double Data Rate Synchronous Dynamic Random Access Memory, DDR SDRAM), and the like; the memory may also include a non-volatile memory (English) such as a flash memory (English). The memory is used to store computer programs (e.g., application programs, functional modules, etc. that implement the methods described above), computer instructions, etc., which may be stored in one or more memories in a partitioned manner. And the above-described computer programs, computer instructions, data, etc. may be invoked by a processor.
The computer programs, computer instructions, etc. described above may be stored in one or more memories in partitions. And the above-described computer programs, computer instructions, data, etc. may be invoked by a processor.
A processor for executing the computer program stored in the memory to implement the steps in the method according to the above embodiment. Reference may be made in particular to the description of the embodiments of the method described above.
The processor and the memory may be separate structures or may be integrated structures that are integrated together. When the processor and the memory are separate structures, the memory and the processor may be connected by a bus coupling.
A fourth embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, is operable to perform a method according to any of the above embodiments of the present invention.
The method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram, which are provided by the embodiment of the invention, can display the operation efficiency of a unit in real time and provide basic data support for energy efficiency management of the compressor; realizing energy-saving and high-efficiency operation management of the reciprocating compressor; calculating based on the proportional relation between effective work and ineffective work in each effective compression stroke of the reciprocating compressor, so as to completely avoid various adverse factors of the traditional method; the operation efficiency of the unit can be mastered on line in real time by adopting an online real-time calculation mode, so that the unit is more economical and rapid; the implementation is simple, the modification and destructive modification of the unit are not involved, and the method is safe and reliable.
According to the method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram, which are provided by the embodiment of the invention, the operation efficiency of the reciprocating compressor unit can be accurately judged and calculated, and the problem of efficiency reduction caused by aging of related parts in the operation process of the compressor can be judged, so that the problem of high operation energy consumption of the unit is solved.
By adopting the method and the system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram, which are provided by the embodiment of the invention, the implementation operation efficiency of the compressor can be accurately calculated, and the accuracy is more than 98%.
It should be noted that, the steps in the method provided by the present invention may be implemented by using corresponding modules, devices, units, etc. in the system, and those skilled in the art may refer to a technical solution of the method to implement the composition of the system, that is, the embodiment in the method may be understood as a preferred example of constructing the system, which is not described herein.
Those skilled in the art will appreciate that the invention provides a system and its individual devices that can be implemented entirely by logic programming of method steps, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc., in addition to the system and its individual devices being implemented in pure computer readable program code. Therefore, the system and various devices thereof provided by the present invention may be considered as a hardware component, and the devices included therein for implementing various functions may also be considered as structures within the hardware component; means for achieving the various functions may also be considered as being either a software module that implements the method or a structure within a hardware component.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (10)
1. An operation efficiency calculating method of a reciprocating compressor based on an indicator diagram is characterized by comprising the following steps:
acquiring flywheel phase information of the reciprocating compressor and shaft side and cover side pressure data of each cylinder;
outputting a real-time indicator diagram of the unit operation according to the phase information and the pressure data;
and obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram.
2. The method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to claim 1, wherein the acquiring flywheel phase information of the reciprocating compressor comprises:
loading a phase detection device on a flywheel of the reciprocating compressor, and continuously acquiring a phase pulse signal through the operation of the reciprocating compressor to obtain phase information; and/or
The acquiring shaft side and head side pressure data for each cylinder of the compound compressor includes:
and loading pressure detection devices on the shaft measurement side and the cover side of each cylinder of the reciprocating compressor respectively, and continuously acquiring pressure signals to obtain pressure data.
3. The method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to claim 1, wherein the outputting the real-time indicator diagram of the operation of the unit according to the phase information and the pressure data comprises:
according to the phase information, X-axis coordinate data of the flywheel angle corresponding to the position of the compressor piston is obtained, real-time coordinate data of the position of the piston relative to the flywheel angle is continuously output, and the phase position of the X-axis is obtained;
and obtaining pressure data with required density according to the pressure data, taking the pressure data as coordinate data of a Y axis, and outputting a real-time indicator diagram of unit operation corresponding to the phase position of an X axis.
4. The method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to claim 1, wherein obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram comprises the following steps:
the real-time indicator diagram is subjected to block segmentation processing based on an average and edge correction principle;
dividing a plurality of divided areas obtained by dividing into an air inlet pressure range and an air outlet pressure range, and then calculating an effective area and a lost area;
and obtaining the real-time operation efficiency of the reciprocating compressor according to the proportional relation between the effective work area and the lost work area.
5. The method for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to claim 4, wherein the real-time indicator diagram is divided into 500 ten thousand parts.
6. An indicator diagram-based reciprocating compressor operating efficiency calculation system, comprising:
the phase detection module is used for acquiring flywheel phase information of the reciprocating compressor;
a pressure detection module for acquiring shaft side and cover side pressure data of each cylinder of the reciprocating compressor;
the indicator diagram construction module outputs a real-time indicator diagram of the unit operation according to the phase information and the pressure data;
and the unit efficiency calculation module is used for obtaining the real-time operation efficiency of the unit in different states according to the real-time indicator diagram.
7. The indicator diagram-based reciprocating compressor operating efficiency computing system of claim 6, wherein the indicator diagram construction module comprises:
a pulse signal processing unit: the unit obtains X-axis coordinate data of the flywheel angle corresponding to the position of the compressor piston according to the phase information, and continuously outputs real-time coordinate data of the position of the piston relative to the flywheel angle, so as to obtain the phase position of the X-axis;
a pressure data processing unit: the unit obtains pressure data of the required density according to the pressure data, and the pressure data is used as coordinate data of a Y axis;
the indicator diagram construction unit: the unit outputs a real-time indicator diagram of the unit operation by corresponding the coordinate data of the Y axis to the phase position of the X axis.
8. The system for calculating the operation efficiency of the reciprocating compressor based on the indicator diagram according to claim 6, wherein the unit efficiency calculating module performs the segmentation processing on the real-time indicator diagram, divides a plurality of segmentation areas obtained by segmentation into an effective work area and a loss work area, and obtains the real-time operation efficiency of the reciprocating compressor according to the proportional relation between the effective work area and the loss work area.
9. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor is operable to perform the method of any of claims 1-5 when the program is executed.
10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor is operable to perform the method of any of claims 1-5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517822A (en) * | 2023-05-29 | 2023-08-01 | 重庆气体压缩机厂有限责任公司 | Compressor state monitoring platform and leakage fault diagnosis method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517822A (en) * | 2023-05-29 | 2023-08-01 | 重庆气体压缩机厂有限责任公司 | Compressor state monitoring platform and leakage fault diagnosis method |
| CN116517822B (en) * | 2023-05-29 | 2024-03-12 | 重庆气体压缩机厂有限责任公司 | Compressor state monitoring platform and leakage fault diagnosis method |
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