JP2003316851A - Design system for rotary machine and adjusting method for rotary machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the efficiency in the design and adjustment of a variously developed rotary machine, particularly, its bearing by guiding an analytic result only by continuously data-inputting a plurality of physical programs for a necessary item every format on the initiative of a computer. <P>SOLUTION: A computer 2 calculates a first physical event value based on a first initial condition by use of a physical analytic program, outputs the first physical event value 14 as initial condition changing feedback value, and calculates a new second physical event value 14 by use of the physical analytic program based on a second initial condition after the change of the first initial condition based on the first physical event value 14 and a design target value L. The second physical event value can get closer to the design target value by such a feedback flow. A target cause value can be immediately known with a minimized number of input procedures for partially changing the cause value. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary machine design system and a rotary machine adjusting method, and more particularly to a rotary machine design system and a rotary machine for automating the design in consideration of dynamic friction heat. Adjustment method.

[0002]

2. Description of the Prior Art Design is carried out on the basis of a high degree of analysis. The designer executes such an analysis and also executes the design based on empirical knowledge accumulated in the past.
Such design is performed by a skilled person. The analysis is a physical analysis such as an oil film pressure (distribution) analysis and a heat distribution analysis, and a bearing analysis is exemplified.

The bearing analysis is performed by a computer. The computer has a program capable of analyzing physical phenomena such as oil film pressure and heat generation distribution as bearing characteristics. The program is composed of a plurality of calculation programs such as an oil film pressure calculation program, a heat generation distribution calculation program, and a bearing deformation program. In order to operate such a program, various data are input to the variables and parameters of the program. Such input is performed corresponding to bearing types such as radial bearings and thrust bearings. The plurality of physical analysis programs required for the design of rotating machines, such as bearing designs, are known to each independently.

Conventionally, a skilled designer operates independent calculation programs independently and inputs a calculated value of a calculation result calculated by one calculation program to a variable or parameter of another calculation program. , They were thoroughly familiar with both calculation programs, and were familiar with past proper cases and past improper cases, and were able to understand the cases and programs organically, and to perform a series of coupled analyses. It is necessary for the input person to be familiar with the program and to input a huge number of various design values (initial conditions) such as the number of rotations of the rotating shaft and the shaft diameter into the variable characters of the program completely without error. , It is very difficult and even impossible unless you are an expert who is familiar with the ideas of multiple analysis programs and mathematical formulas. Design based on complicated and advanced design knowledge
Frequent new designs of rotating machines that are diversifying like today and repairs of rotating machines that are deployed in large numbers on a global scale
It is becoming difficult for even a skilled person to deal with readjustment (example: readjustment of lubricating oil temperature).

The fact that an unskilled person can input analysis data by computer-led data input to required items in a plurality of physical programs in each format and in a coupled manner leads to various evolutions in the earth. There is a need to streamline the design and adjustment of rotating machines, especially their bearings, deployed on a scale.

[0006]

The problem to be solved by the present invention is to analyze a plurality of physical programs by format and in a coupled manner by an unskilled person inputting data for necessary items by computer initiative. It is an object of the present invention to provide a design system for a rotating machine and a method for adjusting the rotating machine, which can establish a technique for efficiently designing and adjusting a rotating machine that is diversified in various ways by leading the results.

[0007]

Means for solving the problem Means for solving the problem are expressed as follows. The technical matters appearing in the expression are accompanied by parentheses (), and numbers, symbols and the like are added. The numbers, symbols and the like are technical matters constituting at least one embodiment or a plurality of examples of the plurality of embodiments or a plurality of examples of the present invention, particularly, the embodiment or the example. It corresponds to the reference numbers, reference symbols, etc. attached to the technical matters expressed in the drawings corresponding to. Such reference numbers and reference symbols clarify correspondences and bridges between the technical matters described in the claims and the technical matters of the embodiments or examples. Such correspondence / bridge does not mean that the technical matters described in the claims are limited to the technical matters of the embodiment or the examples.

The rotary machine design system according to the present invention comprises:
It is composed of a calculator (2) for calculating a first physical event value by a physical analysis program based on the first initial condition and an input device (1) for inputting the first initial condition to the calculator (2). ing. The physical analysis program is for rotating machinery (2
It is a mathematical language incorporated into a calculator (2) to calculate the physical equations that describe the motion of 5). The mathematical language contains a large number of variables and parameters. The calculator (2) uses the first physical event value (14, P or hmi
n) is output as a feedback value for changing the initial condition,
After the first initial condition is changed based on the first physical event value (14, P or hmin) and the design target value (L) corresponding to the first physical event value (14, P or hmin) A second physical event value (14, P or hmin) is newly calculated by the physical analysis program based on the second initial condition. By such feedback / design flow, the second physical event value can be brought closer to the design target value.

The initial condition is a set of a large number of variable values / parameter values, and calculation of physical event values is impossible by hand. Variable values / parameter values Especially, by changing the important cause value (bearing length for bearings) among the many cause values that lead to the result individually, it is possible to instantly know the tendency of change in the result. The number of input procedures for changing a part of is small, and the target cause value can be quickly known. Feedback thus circulating the design flow on a computer does not require empirical knowledge for changing a part of the cause value, and facilitates the design for not only unskilled persons but also skilled persons.

The first initial condition is formed from a physical initial condition, a physical property initial condition, and a geometrical initial condition. The physical initial condition is exemplified by a rotation speed, and the physical property initial condition is a physical property value of a material. As an example, the dimension is exemplified as the geometric initial condition. The rotation speed is the number of rotations of the rotating shaft supported by the bearing, the dimension is the length of the bearing, and the physical property initial condition is the viscosity of the lubricating fluid supplied to the bearing sliding surface. Is the first physical event value is the elevated temperature of the lubricating fluid.

Past data is used for the partial initial condition which is a part of the first initial condition. By changing some of the initial conditions of past data, it is possible to newly design rotating machines that evolve in various ways.

The physical analysis program is a partial condition of the first physical analysis program, the preceding first physical event value calculated by the calculator based on the first physical analysis program, and the first initial condition. And a second physical analysis program for calculating the subsequent first physical event value using the first calculation initial condition. Here, the leading and the trailing correspond physically to the cause and the result, but on the computer, they correspond to the time ahead and behind. If you ignore these steps,
Unable to calculate physical events. Therefore, the insertion position of the feedback flow is physically defined,
Defining its position is critically important. In known trial and error feedback, the position was not fixed, so the circulating flow was literally trial and error. The design flow according to the present invention is not a trial-and-error process even for an inexperienced person, and is a circulation flow that certainly approaches the correct answer.

The calculator (2) outputs the preceding first physical event value as a calculated value changing feedback value and corresponds to the following first physical event value and the following first physical event value. A second physical analysis value is newly calculated by the second physical analysis program based on the second calculation initial condition after the first calculation initial condition is changed based on the provisional set target value (T0).

For the design of a rotating machine, calculations such as heat generation calculation based on thermodynamics, fluid mechanics, material mechanics, shafts based on thermal stress and centrifugal force, deformation calculation of bearings can be performed by a single physical analysis program. Instead, it is executed by a chain or coupling of a plurality of physical analysis programs. Therefore, there is a feedback design between the first physical analysis program and the second physical analysis program, and a feedback design after calculation of the second physical analysis program. Performing such multi-feedback design almost automatically by changing part of the known cause values on a computer frees beginners who are completely unaware of the analysis content from the difficulty (trial and error) of designing a rotating machine. You can Such release is independent of the number of independent analysis programs.

In the initial condition, there is a hypothetical target value as a provisionally set target value. The validity of the hypothetical target value is judged by feedback design.

The minimum fluid film thickness of the lubricating oil is important as the initial condition for the first calculation. Although this importance was only known to design professionals in this field, the present invention allows designing for those who are unaware of its importance. According to the software provided by the present invention, it is not necessary to know its importance.
The preceding first physical event value is the bearing surface pressure, the provisional set target value is the temperature of the lubricating oil, and the first calculated initial condition is the minimum fluid film thickness of the lubricating oil. Such knowledge has been important in the past, but will not be important in the future. Among the first initial conditions, the initial value that is easy to change and that quickly changes to the target value by the change is the length of the bearing. Such knowledge has been important in the past, but will not be important in the future.

An input screen (4) for inputting the first initial condition to the calculator (2) and a first output screen (4-1 for displaying the first physical event value output by the calculator (2). , 2, 3)
And a second output screen (4-4) displaying the second physical event value output by the calculator (2). The first output screen (4 that outputs a part of the input screen and the feedback value
-1, 2, 3) belong to the same screen. Since the same screen display makes the input / output relationship at a glance, it is easy to input to change the initial conditions for feedback of the design flow. You can complete the design by looking only at the screen. The zero point due to the part of the first output screen displaying the first calculation initial condition and the part of the second output screen displaying the second physical event value belonging to the same screen is the same as the advantage described above.

A selection screen for selecting the first physical analysis program and the second physical analysis program in the calculator (2) is added. The act of making selections by looking at the screen is educational to the unskilled person. A database (FIG. 3) accumulating a plurality of past cases having the first initial condition input to the input screen (4-1) is added. A new rotary machine can be easily designed by adopting the initial conditions of the past cases and changing only a part thereof. The plurality of cases is a set of unsuitable cases and proper cases. Knowing bad cases is important to designers.

The first output screen (4-1) displays the design flow chart, and the calculator (2) outputs an alarm when there is a feedback step based on the feedback value in the design flow chart. The display of design flow diagrams is educational and its alerts can facilitate feedback design. The second output screen (4-3, 4) displays the design flow chart, and the calculator (2) outputs an alarm when there is a feedback step based on the feedback value in the design flow chart.

A tribo data table (35) has been added. The tribo data table (35) includes a file name (45), a plurality of keywords (47) corresponding to the file name (45) in a one-to-one correspondence, and a one-to-one correspondence with the keywords.
And a keyword ID (48) corresponding to. Such correspondence makes it easier to know the design knowledge related to each analysis program by searching, and the relationship between the past design examples accumulated by the predecessor and the design knowledge can be educated to the unskilled person. Can be communicated. The case collection (52) is accumulated corresponding to the file name corresponding to the keyword, and new cases are accumulated. The tribo data table (35) further has a material number (43) corresponding to the file name in a one-to-one correspondence, and a database (FIG. 3).
Has design knowledge corresponding to the material number (43). The first initial condition of the case collection (52) is the first output screen (4
-1) is automatically input.

A rotary machine adjusting method according to the present invention is a rotary machine adjusting method for adjusting a rotary machine by using the above-described rotary machine design system, wherein the first method is used regardless of a feedback value for changing an initial condition. The method includes the steps of changing the initial condition, calculating the first physical event value, and making the second physical event value closer to the design target value. The steps are performed by a calculator in the plant where the rotating machine resides. The steps are performed by a calculator in a management center outside the plant where the rotating machine resides. The management center exists singly in Japan, and the calculator has an output device that outputs the second physical event value to a plant in Japan or a foreign country in which a plurality of rotating machines exist. Due to such centralization of computers at one location or global distribution, computers at one location or a plurality of locations are connected to a plant site by a communication line, thereby improving the efficiency of readjustment work at the site.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Corresponding to the drawings, in an embodiment of a design system for a rotary machine according to the present invention, a man-machine interface is provided together with a program execution computer. The man-machine interface 1 is connected to a program execution computer 2 as shown in FIG. The man-machine interface 1 is an input device that inputs a plurality of physical analysis programs and analysis data to the program execution computer 2, and receives and displays analysis result data output from the program execution computer 2. It is a display device.

The man-machine interface 1 has an analysis program selection screen 3 for displaying a plurality of bearing analysis codes,
Analysis data input screen 4 and analysis result data display screen 5
It is formed from and. The bearing analysis program is representative of a plurality of analysis programs for rotating machines. The program name of "bearing analysis" is displayed on the first screen 6 of the analysis data input screen 4 in association with the program start.
A plurality of bearing types and a plurality of bearing analysis program codes 8-j are input and displayed on the first screen 6 or the second screen 7 which is a screen subsequent to the first screen 6. The designer
By moving the cursor to the click area corresponding to the display area in which the bearing analysis program code 8-j and the bearing type are displayed and clicking the area, the bearing corresponding to the bearing analysis program code 8-j The analysis program is input to the program execution computer 2 to start execution of the physical analysis selected for the bearing of the specified bearing type. The physical analysis program selected for the bearing of the specified bearing type is hereinafter simply referred to as the analysis code. The analysis code is a set of a single analysis program or a plurality of analysis programs that are coupled to each other.

On the second screen 7, a manual for teaching and teaching the designer how to input the selected analysis code is displayed. The designer who wants to see the instructions can see the second screen 7
By clicking the specific area of, the instruction can be displayed on the second screen 7 or a teaching screen different from the second screen 7. Input data example 9-j input in the past for the analysis code is displayed on the teaching screen. The input data example 9-j is a design value properly determined in the past with respect to bearing specifications such as bearing dimensions, materials, and rotation speeds of one specified analysis code.

After learning the input procedure, the designer shifts the screen to the third screen 11 which is the design value input screen. Third
The screen 11 has a data input field 12 corresponding to all input data required for a newly designed bearing. The designer puts the cursor on the provisional design value that is provisionally set in the data input field 12 of the third screen 11 and inputs the definite design value or the provisional design value from the keyboard.
The tentative design value is a design value that can be changed by the feedback design.

The design value is language-converted into the execution input data 13 for the program execution computer 2. The execution input data 13 is the same as the design value manually input by the designer, or a value processed corresponding to the design value. The processing can be performed internally by the program execution computer 2. The program execution computer 2 executes a calculation in the specified analysis code based on the execution input data 13. The analysis code is linked so that a plurality of known calculation execution programs operate in a coupled manner. The rotation speed of the rotating shaft and the clearance of the bearing have already been input as the execution input data 13. As a linked program, a calorific value calculation program that calculates the amount of heat generated in the bearing clearance based on the rotational speed of the rotating shaft, the bearing clearance and the lubricating oil used, and the bearing sliding surface corresponding to that calorific value Heat conduction to
Coupling with a structural calculation program (element analysis) for calculating pressure and thermal deformation of bearings and rotating shafts is exemplified. The important parameters are the clearance between the rotating and sliding surfaces, the type of lubricating oil passage, the cooling structure, the lubricating oil specification number (product number), the rotating speed, and the heat of the rotating shaft and bearing. Physical property values such as conductivity are exemplified. The bearing length is a target design value obtained by feedback design.

The program execution computer 2 executes a mathematical program for executing element analysis for each mesh based on a plurality of differential / integral equations corresponding to the analysis code (exemplification:
It has heat conduction analysis, thermal stress analysis, and vibration analysis). The program execution computer 2 outputs the analysis result data 14 which is a calculation result as an output result. The analysis result data 14 is displayed on the analysis result data display screen 5. The program execution computer 2 has a function of determining whether the analysis result data 14 is proper. The result is that the amount of heat generated is too large to be sufficiently cooled by the cooling structure, the temperature of the sliding surface exceeds the allowable value, and seizure on the surface of the sliding surface of the bearing or rotating shaft cannot be avoided. Inappropriateness is displayed on the analysis result data display screen 5. Result items that the designer must know as such an output are taught by the designer's click operation, and the output example manual 15 that explains the output example is displayed on the analysis result data display screen 5. Result item column 16
Is displayed on the analysis result data display screen 5. The calculation result value is automatically displayed in the result item column 16, or the calculation result value is displayed in the result item column 16 by the designer's click of the item column, and further, the judgment of appropriateness / inappropriateness is displayed,
Moreover, the existence of better legitimate values is taught.

The designer looks at the result displayed on the analysis result data display screen 5 and displays the input data example 9-j on the analysis data input screen 4 again to bring the result data closer to a proper value. Teach a method of re-inputting a plurality of input parameters. As the teaching, the guideline for changing the lubricating oil,
An example is a large / small direction pointer of the gap between the sliding surfaces and a large / small direction pointer of the flow velocity of the lubricating fluid. Such guidelines are output based on past design examples. The designer changes the value of a single parameter or a plurality of parameters based on the guideline.
The program execution computer 2 executes reanalysis based on the newly input execution input data 13. Such feedback of the design flow allows the designer to approach the most appropriate design. The designer, who does not know the contents of the analysis program or learns the analysis program according to the teachings, is independent of the existence of the established analysis program and has the same degree as or exceeds the level of the first-class skilled designer. Design can be done.

FIG. 2 preferably illustrates the feedback design flow. Each of the plurality of input data examples 9 includes an input data example 17 and an input data manual 18. The past input data example 17 regarding the identified and actually operating bearing is captured in the analysis data input screen 4. The input data manual 18 guides the parameters to be changed and the change amount when the rotational speed between the bearing to be designed this time and the bearing of the past design is only increased by 10%. The input data manual 18
Instruct the designer to increase the bearing inner diameter by 1% and increase the lubrication flow rate. The designer newly added the 1% increase in bearing inner diameter and the increased lubricating fluid flow velocity to the third screen 11
Enter from. The designer knows the analysis result data 14 calculated by the program execution computer 2 based on the new parameter value, and repeats the feedback design flow described above. Designers can instantly complete appropriate designs of rotating machines (e.g., diesel engines for generators) that evolve in various ways in response to various users' demands. If the number of combinations of parameter changes increases, a large number of personal computers will be used simultaneously to output a large number of design examples, and a feedback design flow will be repeated for each of a large number of design examples to achieve the maximum convergence. Appropriate design becomes possible and man-machine feedback design becomes possible.

FIG. 3 exemplifies a database of a bearing analysis program. The database is a model name (example: sleeve bearing), a functional description corresponding to each analysis code (example: mechanical description specific to the sleeve bearing of thermal stress analysis mathematics), and input data values of multiple parameter sets ( It consists of optimum bearing specifications established in the past) and limiting conditions. As the limiting conditions, the maximum bearing diameter and the rotor surface temperature are exemplified. The program execution computer 2 can obtain the unknown number with the bearing diameter as a single unknown number. If the calculation result exceeds the maximum bearing diameter, the inappropriate input data value is displayed on the analysis result data display screen 5. The past input data is accumulated as an accumulation of the input data template 19 which is one of various data combinations.

FIG. 4 illustrates an input data template 19 that supports data input. The input data template 19 includes a bearing type input field 21 for inputting a bearing type.
A pad number input field 22 for inputting the number of divisions of the sliding surface to be cooled (the number of pads in FIGS. 5 and 6), a horizontal eccentricity input field 23 for inputting the horizontal eccentricity of the bearing, and a lubrication And an oil supply temperature input field 24 for inputting the oil supply temperature. The input data template 19 has already been input with actual data on bearings designed and operating in the past. The data is absolutely prohibited from modification with respect to the template. When data is newly updated, it is necessary to add a new template ID.

As the bearing, a plurality of journal bearings,
The type of thrust bearing is exemplified. 5 to 7 exemplify the tilting pad type thrust bearing 25.
As shown in FIG. 5, the bearing 25 has an outer diameter D and a bearing length L. A lubricating oil lubrication region 28 is formed between the bearing 25 and the rotary shaft-side flange 27 of the rotary shaft 26, which is a sliding surface perpendicular to the shaft. Rotating shaft side flange 27 that receives thrust force F
Comes into pressure contact with the bearing 25 via the lubricating oil lubrication region 28.
A part of the axis-perpendicular surface of the rotary shaft side flange 27 is a rotary shaft side sliding surface 29
And the bearing 25 forms a bearing side sliding surface 31.

The bearing-side sliding surface 31 forms a composite sliding surface, as shown in FIG. The bearing side sliding surface 31 is
It is formed in a region between two concentric circles whose center line is the center line P of the rotary shaft 26. The bearing-side sliding surface 31 has a surface 32 and a plurality of pads 33 arranged on the same circumference at equal angular intervals. The surface 32 has a lubricating fluid supply hole 34 for supplying a lubricating fluid. The lubricating fluid supply hole 34 extends in the axial direction and opens at the surface 32. The lubricating fluid supply holes 34 are arranged at equal angular intervals,
The lubricating fluid supply holes 34 and the pads 33 are arranged alternately. The lubricating fluid is supplied from the lubricating fluid supply hole 34 to each pad 3
3 is supplied to the bearing side sliding surface 31 and discharged.

FIG. 7 shows the axial positioning of the pad 33 by cutting along the plane including the axis P of rotation. The gap U between the lubricating oil lubrication region 28 and the facing surface of the rotary shaft side flange 27 is a fluid film thickness h indicating a width of the thickness of the lubricating fluid film formed.
have s. The oil film thickness corresponding to the fluid film thickness hs is related to the oil film pressure and is an important parameter in bearing design.

Input data, which is example input data 17, is an initial condition for describing the dynamics of a bearing. The program execution computer 2 calculates a physical event value based on the initial condition. Initial conditions include operating conditions such as rated speed, rotating shaft dimensions, bearing type, bearing material, bearing length,
The bearing dimensions are like the clearance U. Based on the initial conditions,
Relative motion between the rotating shaft and the bearing, heat generation based on the motion, periodic partial vibration between the rotating shaft and the bearing that bends due to the heat generation are calculated, and finally the sliding surface is calculated. The oil film pressure of the oil film between them is calculated. If the oil film pressure exceeds the allowable value, seizure will occur on the bearing surface. The seizure limit pressure at which seizure occurs is known empirically. When the calculated oil film pressure exceeds the limit pressure, the initial condition is changed in an instructional manner and reanalysis is executed. By changing the initial conditions variously, the oil film pressure (oil film surface pressure) as a calculated value changes corresponding to the initial conditions. When the variation value (drift) has a constant distribution (normal distribution as statistical significance), the set of initial conditions for indicating the center value is the optimum design value set (A1, A).
2, ..., An). : Within the oil film pressure allowable range: A1: Bearing length A2: Average temperature of lubricating oil Aj: Lubricating fluid flow rate (unit time) An: Gap U

Such unknowns are not limited to the oil film pressure, and the lubricant average temperature is selected. If the oil film pressure is one of the initial conditions, the feedback design flow is repeated and analyzed so that the calculated lubricating oil temperature is within the allowable lubricating oil temperature. : Within the allowable range of lubricating oil temperature: A1: Bearing length A2: Oil film pressure Aj: Lubricating fluid flow rate An: Gap U

FIG. 8 shows an embodiment of the coupled analysis of the feedback design flow. The analysis data input screen 4 is configured as a bearing initial condition input unit. The analysis data input screen 4 is displayed on the program execution computer 2
Is a data input device attached to, and a combination of a keyboard and a mouse is exemplified. The bearing operating condition, bearing type, bearing material, and bearing length are manually input from the analysis data input screen 4. The program execution computer 2 calculates the bearing surface pressure as the calculation result. When the bearing surface pressure exceeds the set allowable value, the designer is notified through the analysis result data display screen 5 of the man-machine interface 1. Upon receipt of the notification, the designer follows one of the bearing operating conditions, bearing type, bearing material, and bearing length according to the guidance.
One or more values are changed. When the bearing surface pressure, which is the calculated value, becomes a value smaller than the set allowable value by repeating the initial condition input and the analysis (step S1 in FIG. 9), the bearing surface pressure is adopted as the execution input data 13. The bearing surface pressure, which is the input data 13 for execution, is adopted as a parameter of the bearing characteristic analysis program selected on the bearing analysis program selection screen 3, and the program execution computer 2
Analyzes the bearing characteristics with the bearing characteristics analysis program (step S2 in FIG. 9).

In order to calculate the bearing surface pressure, lubricating fluid data, a bearing material list, and past results of the bearing surface pressure are displayed on the analysis data input screen 4 as calculation support data. Lubricating fluid data, bearing material list, and past results of bearing surface pressure are accumulated in an electronic file and displayed on the analysis data input screen 4 according to the designer's intention. When one bearing material is selected from the bearing material list, the physical property value of the bearing material is automatically input to the program execution computer 2. The program execution computer 2 as a bearing characteristic analysis calculator that executes step S2 automatically refers to the guide for selecting the bearing clearance CR and the lubricating fluid viscosity coefficient, and the designer needs to input it. There is no.

FIG. 10 shows the program execution computer 2.
2 shows a bearing characteristic analysis calculator 2-1 which is a part of FIG. The guide for selecting the bearing clearance CR and the lubricating fluid viscosity coefficient are automatically input from the electronic file 35 to the calculator portion 36.
The calculator portion 36 calculates the lubricant average temperature, the Sommerfeld number, the Reynolds number, and the power loss based on the manually input operating average fluid temperature and the execution input data fetched from the electronic file 35. Calculate and output them,
Further, the assumed average lubricant temperature is compared with the output value of the average lubricant temperature, and if the calculated average lubricant temperature exceeds the assumed average lubricant temperature, the designer changes the working average fluid temperature. Then, again, the program execution computer 2
To the calculator portion 36 of

FIG. 11 shows the bearing evaluation calculator 2-2. The appropriate lubricant average temperature calculation value 37 is input from the bearing characteristic analysis calculator 2-1 to the calculator portion 38 of the bearing evaluation calculator 2-2. The calculator portion 38 calculates the minimum fluid film thickness in the gap U and the drain rise temperature. The bearing evaluation calculator 2-2 compares the calculated minimum fluid film thickness with the evaluated value, and further compares the calculated drain rise temperature with the evaluated value to calculate the minimum fluid film thickness calculated with the drain rise. If the calculated temperature value is a non-conforming value, the process returns to the initial condition input step S0 of FIG. 9 to revise the initial condition. If both the minimum fluid film thickness calculated value and the drain rise temperature calculated value are compatible values, the bearing evaluation calculator 2-2 outputs the analysis result data 14 which is the bearing calculation result. The mismatch of the minimum fluid film thickness means
It is defined as being N times or more the surface roughness of the lubricated sliding surface (N is a setting constant). If the calculated value is a conforming value, the calculated value is stored in the database of FIG. 3 as a calculation result and used as a conforming model for future design. The set of compatible values obtained by such calculation is routinely obtained for an imaginary bearing, and the set of compatible parameter values {A
When j} is obtained in advance and an actual rotary machine is ordered, a set of compatible design values is immediately obtained.

In the man-machine interface 1 while the program execution computer 2 is operating, the execution area of the program of the analysis code corresponding to the calculation currently being performed is preferably displayed on the screen. In this case, the screen is divided into two, one screen displays the entire design flow and the currently operating part (color change), and the other screen displays the step (color) of the detailed flow of the calculation execution part. Replacement)
It is effective and educational for unskilled people.

FIG. 12 shows the detailed structure of the electronic file 35. The electronic file 35 constitutes the tribo data tables 39-1 to 39-n. The tribo data table 39 provides the designer with design knowledge necessary for design. Design knowledge is a corresponding set of physical quantities for calculating physical events such as seizure limit, specific gravity, friction amount, and thermal conductivity, and physical property values or characteristic values of fluids, rubbers, and other substances corresponding to the physical quantities. Relationship, {lubricating oil}
The correspondence of − {viscosity coefficient} is illustrated. One tribo table 39-j has an ID number 42, a material number 43,
A title 44, a file name 45, a file type (example: text) 46, and various keyword IDs 47
-1 to m. An example of the title is an academic paper name. The academic papers include the latest research reports on bearing materials. As a material indicated by the material number 43, a list of lubricating oils (example: world standard specifications) is illustrated. Examples of the keyword include physical quantity concepts such as seizure limit, viscosity coefficient, hardness, specific gravity, heat resistant temperature and elastic modulus, and acquisition routes such as manufacturer name. For one keyword, a keyword table 48-j corresponding to the ID and its name is attached to each keyword ID 47-j. The file name 44 is accompanied by a physical quantity set 51 belonging to the file and a past case collection 52. As a casebook, past nonconformance examples are important. If the elastic modulus appears by searching based on the ID of the keyword "rubber", it is possible to find an elastic modulus table that associates all kinds of rubbers with their elastic moduli based on the keyword ID of the elastic modulus.

The tribo data table 39-j is independent of each other, and based on the material number 43 which can be searched based on the reference number and the file name 44 in which the reference material is stored, the contents of the reference are instantly displayed. Further, based on the keyword ID corresponding to the academic term appearing in the document, more detailed design knowledge can be obtained. By assuming a material change (stainless steel change), the surface pressure can be recalculated while in front of the personal computer. By updating the current data to the latest data by adding / deleting new keywords and adding / deleting / re-editing the tribo data table, it is possible for an unskilled person to easily follow the rapid technological innovation in real time.

The keywords necessary for bearing design are summarized in a keyword list, and the keyword table can be easily reached by inputting the name of the keyword. If the keyword ID is known, the keyword can be obtained based on the ID. All files including keywords can be opened, and files corresponding to multiple chains of keyword IDs can be easily opened. As shown in FIG. 13, a plurality of designers who use a plurality of tribo data tables,
The bearing design material 54 can be shared based on the file name 44 registered in the central management server 53 to which the plurality of tribo data tables 39-s, t are connected.
With such sharing, the user side will not be affected by changes in bearing design data.

FIG. 14 shows the mobility of the tribo data table. All design materials are transported on CD-ROM
Transfer is possible. If the CD-ROM is transferred to a plant where a rotating machine such as a power plant exists and the CD-ROM is inserted into a personal computer there, the personal computer 5
5 can be immediately used as one tribo data table. When it is diagnosed that seizure is likely to occur because the average temperature of the lubricating oil measured in the field is higher than the set temperature, unskilled personnel should provide a file corresponding to the bearing in such a situation. It is possible to find out a method (example: adjusting the flow rate of the cooling medium) for accurately preventing seizure by looking at the design data constructed by a skilled person by looking for it.

FIG. 15 exemplifies a screen 4-1 which is a part of the analysis data input screen 4 of the man-machine interface 1 for the journal bearing. As the initial conditions input through the analysis data input screen 4-1, there are physical initial conditions and geometric initial conditions. Physical initial conditions include mechanical conditions such as bearing operating conditions and material mechanical properties such as bearing materials. The geometrical initial conditions include the bearing type and the bearing length.

The bearing operating condition input field is the rotation speed N input field 5.
5, bearing load (mass) W input field 56, shaft diameter O input field 5
7, specific mass γ input field 58, lubricating oil supply temperature T input field 5
9, axis inclination angle α input field 61, surface roughness s input field 62,
It is composed of a specific heat Cp input field 63 and other input fields (not shown). Initially, the input to these input fields is manual input. The lubricating fluid is selected in the lubricating fluid selection input field 64. The bearing type input column 65 displays the bearing types in ascending and descending order, and the bearing type can be selected by clicking the selection column 65.

The bearing material is selected from the list 66, and the allowable surface pressure Py and the maximum temperature limit Tmax are manually or automatically entered corresponding to the selected bearing material. It is input through 68. The list 66 is
By clicking this, the screen will change to the list screen. Further, the designer can obtain the design knowledge necessary for the design from the database and the tribo data table 39 of FIG. The bearing length L is input through the bearing length input field 69, and the shaft diameter ratio (= L / D) is input through the shaft diameter ratio input field 71. The surface pressure P is calculated by the following formula: P = W / L · D The surface pressure can be one of the initial conditions.

When the allowable surface pressure Py is smaller than the calculated surface pressure P, the bearing length is re-input (first feedback input). When the allowable surface pressure Py is larger than the calculated surface pressure P, the screen 4-1 shifts to the next screen 4-2 shown in FIG. The rotation speed (peripheral speed) V is input into the input field, and the rotation speed is automatically calculated from the already input D and N and automatically input. : V = πDN Furthermore, PV indicating the operating state is calculated. : PV = πDNP This PV is automatically input to the PV input field 73. Further, the above-mentioned bearing gap U is entered in the radial gap Cr input field 74.

FIG. 17 is a part of the analysis data input screen 4, but a screen 4-3 which is a transition from the screen of FIG. 16 is displayed.
Is. On screen 4-3, the average lubrication temperature is the average lubrication temperature T
It is hypothetically entered in the 0 input field 75. The lubricating fluid viscosity is
The lubricating fluid viscosity μ is automatically entered in the input field 76 by calculation. The relationship between viscosity and temperature is known as displayed in the upper right of the screen. The Sommerfeld number and Reynolds number are calculated based on the physical properties such as the viscosity of the lubricating fluid, and the Sommerfeld number S input field 77 and Reynolds number R are calculated.
It is automatically input to each of the e input fields 78 by calculation. Based on these coefficients, it is determined whether the flow of the lubricating fluid is turbulent, and if the turbulent flow display area indicates that the flow is not turbulent, clicking the calculation execution click area 79 causes the program execution computer 2 to The eccentricity, dimensionless side loft, and friction coefficient of the rotating shaft or the bearing that bends due to cyclic surface pressure from the rotating shaft when the bearing characteristic analysis program starts operation The Qs input field 82 and the friction coefficient f input field 83 are respectively input and displayed.

Power loss H which is important to know the thermal behavior
Is calculated by the following equation based on the friction coefficient f, the load W, and the speed V. : H = fWV The power loss is automatically input to the power loss H input field 84 by calculation. Next, the temperature increase ΔT of the drain discharged as a part of the lubricating fluid corresponding to the power loss H is calculated by the following equation. : ΔT = H / γCpQs The temperature increase ΔT is automatically input to the temperature increase ΔT input field 85 by calculation.

Next, the operating average fluid temperature Tave is calculated by the following equation. : Tave = Ts + ΔT / 2 where Ts has already been input. The working average fluid temperature is
The working average fluid temperature Tave input field 86 is automatically input by calculation. It is determined whether the operating average fluid temperature Tave is in the range of X% (example: 20%) with respect to the assumed average lubricating temperature T0. If the operating average fluid temperature Tave is not within the range of X% with respect to the assumed average lubricating temperature T0 (corresponding to viscosity), the assumed average lubricating temperature is changed (second feedback input). If the operating average fluid temperature Tave is within the range of X% with respect to the assumed average lubricating temperature T0, the screen 4-
3 shifts to the next screen 4-4.

FIG. 18 is a part of the analysis data input screen 4, but a screen 4-4 which is a transition from the screen of FIG. 16 is displayed.
Is. Next, the minimum fluid film thickness hmin is calculated by the following equation. : Hmin: = Cr · (1-ε) The minimum fluid film thickness hmin is automatically entered in the minimum fluid film thickness hmin input field 87 by calculation. Next, it is determined whether the minimum fluid film thickness hmin is equal to or more than M times the input surface roughness s (example: 3). Minimum fluid film thickness h
If min is M times or more of the surface roughness s, the screen returns to screen 4-1 in FIG. 15 and the bearing length is changed (third feedback input). If the minimum fluid film thickness hmin is M times or less of the surface roughness s, and the drain rise temperature ΔT is Zdeg or more, the bearing length is further changed so that the minimum fluid film thickness hmin is Is less than M times the length s, and
If the drain rise temperature ΔT is lower than the specified Zdeg, the minimum fluid film thickness hmin and the drain rise temperature ΔT are finally output to the analysis result data display screen 5 and displayed as the calculation results. The screen 4-4 can also be used as the analysis result data display screen 5.

Mathematical basic knowledge of design (known): Sommerfeld number S = S (μ, N, P, Cr, D) Reynolds number Re = Re (γ, U, Cr, μ) Friction coefficient f = f (Cr, D, S)

Step summary: Step 1: Description of bearing operating conditions (input of initial conditions) Step 2: Selection of bearing type (input of initial conditions) Step 3: Selection of bearing material (input of initial conditions) Step 4: Bearing length Selection (including feedback step) Step 5: Surface pressure calculation (first program) Step 6: Comparison with bearing allowable surface pressure (feedback
Step activation) Step 7: PV calculation for operation Step 8: Selection of bearing clearance (setting of standard)

Step 9 (Bearing Characteristic Analysis: Second Program): Step 9-1; Hypothetical (Provisional) Setting of Lubricating Fluid Temperature Step 9-2: Calculation of Lubricating Fluid Temperature Step 9-3: S and Re Calculation step 9-4: turbulent flow determination step 9-5: calculation of ε, f and Qs step 9-6: calculation of power loss H step 9-7: calculation of drain temperature ΔT step 9-8: of Tave Calculation Step 9-9: Comparison of Assumed Fluid Temperature (Corresponding to Viscosity) and Calculated Value

Step 10 (Feedback Step): Step 10-1: Calculation of Minimum Fluid Film Thickness Step 10-2: Comparison of hhim Calculation and Surface Roughness (Activation of Feedback Step / Resetting Bearing Length) Step 10-3: Evaluation of ΔT (trigger feedback step / reset bearing length)

In the flow display areas 91 to 94 on the left side of the screens shown in FIGS. 15 to 18, the design flow shown in FIG. 19 is shown as a flow chart 95. A feedback design flow for re-selecting the bearing length is shown in the flow display area 91. In particular, when the feedback is executed according to the judgment / judgment, the judgment step (diamond-shaped international standard display) 96 is It is preferable to provide an optical display such as coating 97, blinking, or an alarm display that requires feedback such as an alarm sound. Especially, the step of changing the bearing length due to the improper surface pressure of the bearing sliding surface, or the step of changing the set temperature when the temperature is improper, and the bearing length due to the improper minimum fluid film thickness. Such an alarm is preferred in the change step (flow display area 94 of FIG. 18). It is important to raise awareness of the existence of the feedback step when the execution of the first physical analysis program is changed to the execution of the second physical analysis program.

[0059]

The rotary machine design system according to the present invention,
In addition, the method of adjusting the rotating machine dramatically improves the design efficiency of the diversifying rotating machine, especially the bearing, based on the feedback design flow.

[Brief description of drawings]

FIG. 1 is a system block / combined operation flow chart showing an embodiment of a rotary machine design system according to the present invention.

FIG. 2 is a system block-combined operation flow chart showing a modified example of a part of the operation flow.

FIG. 3 is a diagram showing a database.

FIG. 4 is a table showing input data.

FIG. 5 is a cross-sectional view showing a bearing.

FIG. 6 is a side sectional view of FIG.

FIG. 7 is a cross-sectional view showing details of a part of FIG.

FIG. 8 is a system block / operation flow chart showing another embodiment of the rotary machine designing apparatus according to the present invention.

FIG. 9 is an operation flow diagram showing an embodiment of a designing device for a rotary machine according to the present invention.

FIG. 10 is a system block-combined operation flowchart showing still another embodiment of the rotary machine designing apparatus according to the present invention.

FIG. 11 is a system block-combined operation flow chart showing still another embodiment of the rotary machine designing apparatus according to the present invention.

FIG. 12 is a table showing a tribo data table.

FIG. 13 is a system block diagram showing still another embodiment of the design system for a rotary machine according to the present invention.

FIG. 14 is a system block diagram showing still another embodiment of the design system for a rotary machine according to the present invention.

FIG. 15 is a front view showing an input / output screen.

FIG. 16 is a front view showing another input / output screen.

FIG. 17 is a front view showing still another input / output screen.

FIG. 18 is a front view showing still another input / output screen.

FIG. 19 is a front view showing still another input / output screen.

[Explanation of symbols]

2 ... calculator 3 ... Input device 4 ... Input screen 4-1, 2, 3, ... First output screen 4-3, 4 ... Second output screen 14 ... First physical event value 25 ... Rotary machinery (bearings) 35 ... Tribo data table 43 Material number 45 ... File name 47 ... Keyword 48 ... Keyword ID 52 ... Case study Figure 3 ... Database L: Design target value T0 ... Provisional setting target value

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideki Sawada             2-19-13 Takanawa, Minato-ku, Tokyo Co., Ltd.             Ryoyu System Technology F term (reference) 5B046 AA00 DA01 HA05 JA07 KA05

Claims (23)

[Claims] 1. A calculator for calculating a first physical event value based on a first initial condition by a physical analysis program; and an input device for inputting the first initial condition to the calculator, The dynamic analysis program is a mathematical language incorporated in the calculator to calculate a physical equation that describes the motion of the rotating machine, and the calculator uses the first physical event value as feedback for changing the initial condition. The physical value based on the second initial condition after the first initial condition is changed based on the first physical event value and the design target value corresponding to the first physical event value. A second physical event value is newly calculated by a dynamic analysis program, and the second physical event value approaches the design target value. 2. The first initial condition comprises a physical initial condition, a physical initial condition, and a geometric initial condition, the physical initial condition has a rotation speed, and the physical initial condition is a material. 2. The design system for a rotating machine according to claim 1, wherein the physical property values are, and the geometric initial conditions have dimensions. 3. The rotational speed is a rotational speed of a rotating shaft supported by a bearing, the dimension is a length of the bearing, and the physical property initial condition is a lubricating fluid supplied to a bearing sliding surface. 3. The design system for a rotating machine of claim 2, wherein the first physical event value is the elevated temperature of the lubricating fluid. 4. The rotary machine design system according to claim 1, wherein past data is used as a partial initial condition which is a part of the first initial condition. 5. The physical analysis program includes a first physical analysis program, a preceding first physical event value calculated by the calculator based on the first physical analysis program, and the first initial condition. Subsequent first using the first calculation initial condition that is a partial condition of
A second physical analysis program for calculating a physical event value, wherein the calculator outputs the preceding first physical event value as a calculated value changing feedback value, and the following first
The second physics based on the second calculation initial condition after the first calculation initial condition is changed based on the physical event value and the provisional setting target value corresponding to the subsequent first physical event value. The design system for a rotating machine according to claim 1, wherein the second physical event value is newly calculated by the dynamic analysis program. 6. The design system for a rotating machine according to claim 5, wherein the provisional set target value is a hypothetical target value. 7. The design system for a rotary machine according to claim 6, wherein the first calculation initial condition is a minimum fluid film thickness of lubricating oil. 8. The preceding first physical event value is a bearing surface pressure, the provisionally set target value is a temperature of lubricating oil, and the first calculation initial condition is a minimum fluid film thickness of the lubricating oil. A design system for a rotating machine according to claim 6. 9. The design system for a rotating machine according to claim 7, wherein the first initial condition is a bearing length. 10. An input screen for inputting the first initial condition to the calculator, a first output screen for displaying the first physical event value output by the calculator, and an output by the calculator. 6. The rotating machine according to claim 5, further comprising: a second output screen displaying the second physical event value, wherein a part of the input screen and a part of the first output screen outputting the feedback value belong to the same screen. Design system. 11. The rotating machine according to claim 10, wherein a part of the first output screen displaying the first calculation initial condition and a part of the second output screen displaying the second physical event value belong to the same screen. Design system. 12. The rotary machine design system according to claim 5, further comprising a selection screen for selecting the first physical analysis program and the second physical analysis program in the calculator. 13. The design system for a rotating machine according to claim 5, further comprising a database accumulating a plurality of past cases having the first initial condition input to the input screen. 14. The design system for a rotary machine according to claim 13, wherein the plurality of cases is a set of unsuitable cases and proper cases. 15. The first output screen displays a design flow chart, and the calculator outputs an alarm when there is a feedback step based on the feedback value in the design flow chart. Rotary machine design system. 16. The second output screen displays a design flow chart, and the calculator outputs an alarm when there is a feedback step based on the feedback value in the design flow chart. Rotary machine design system. 17. The tribo data table further comprises a file name, a plurality of keywords corresponding to the file name in a one-to-one correspondence, and a keyword ID corresponding to the keyword in a one-to-one correspondence. The design system for a rotating machine according to claim 13, further comprising: a collection of the case examples corresponding to file names corresponding to the keywords. 18. The rotary machine design system according to claim 17, wherein the first initial condition of the case collection is automatically input to the first output screen. 19. The rotating machine according to claim 13, wherein the tribo data table further comprises a material number corresponding to the file name in a one-to-one correspondence, and the database has design knowledge corresponding to the material number. Design system. 20. A method for adjusting a rotating machine using the rotating machine design system according to claim 1, which is selected from claims 1 to 19, and is a set of a plurality of steps described below: changing the initial condition. Of the rotary machine including the step of changing the first initial condition without depending on the feedback value for use, the step of calculating the first physical event value, and the step of bringing the second physical event value closer to the design target value. Adjustment method. 21. The method for adjusting a rotating machine according to claim 20, wherein the steps of assembling are performed by the calculator in a plant in which the rotating machine exists. 22. The method of adjusting a rotating machine according to claim 20, wherein the steps of assembling are performed by the calculator in a management center outside a plant where the rotating machine exists. 23. The management center is singly present in Japan, and the calculator outputs the second physical event value to a plant in Japan or in a foreign country in which a plurality of rotating machines are present. The method for adjusting a rotating machine according to claim 22, further comprising an output device.