JP3859453B2 - Information provision method for replacement of machine parts - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a replacement for the information Hohisage subjected method machine parts already set.
[0002]
[Prior art]
As a method for providing information on existing machine parts, there is a technique described in Japanese Patent Laid-Open No. 8-44421. This known example discloses a method for providing information such as cost and time required for maintenance management based on data on the degradation status and operation status of equipment.
[0003]
Further, technologies relating to the effective use of waste products include those described in JP-A-6-171477 and JP-A-6-165977. In these known examples, the parts are reused through parts disassembly, part inspection, and part repair processes.
[0004]
Furthermore, there is a technique described in Japanese Patent Laid-Open No. 10-222568 as a technique for realizing low cost in the entire product life cycle. This known example discloses a system that realizes product development / improvement, use of reused parts, maintenance, collection, second-hand sales, and rationalization of processing.
[0005]
[Problems to be solved by the invention]
Some machine products such as industrial machines have a long service life. For example, in a hydraulic machine (for example, a water wheel or a pump), the usage period is as long as 20-30 years. For this reason, it is often the case that the machine in operation is not as efficient as a machine designed based on the latest technology, or the original design performance is not maintained due to wear or the like due to long-term use.
[0006]
The technique described in JP-A-8-44421 only provides information such as cost and time required for product maintenance and management, and is described in JP-A-6-171477 and JP-A-6-165977. These technologies are related to the reuse of waste rather than the products in use, and all of them are machines whose shape has changed from the existing ones by evaluating the performance of machine parts used for a long period of time, redesigning and redesigning machine parts based on it. Reinstallation of parts has not been studied. Japanese Patent Application Laid-Open No. 10-222568 does not similarly discuss the above-mentioned matters of products in use.
[0007]
An object of the present invention is to provide a case of replacing a part component of the existing machine, or a whole new design products, the replacement information providing how the mechanical parts that provides information indicating the degree of performance improvement is there.
[0008]
[Means for Solving the Problems]
(1) In order to achieve the above object, the present invention provides a shape measuring device for measuring the shape of an existing machine part, and processing the measurement data generated by the shape measuring apparatus to obtain the shape data of the machine part. a data processor for creating, in replacement for the information providing method of a machine part by a system and a computer for processing the shape data, the computer is, the surface shape Jode over data that can take advantage of the shape data in the numerical analysis conversion, the performance evaluation was carried out the surface-type Jode over data based on a first procedure for creating the evaluation data of the mechanical parts, the computer, using surface shape data of the mechanical parts, the It said machine part shape changing of evaluating the performance, the first is higher performance than the evaluation data created in step shapes in a state in which the dimensions were fixed constraint portion of the machine parts To obtain the shape for improving performance of mechanical parts and newly designed, and those composed of a second procedure for creating a performance evaluation data of the new design and mechanical parts.
[0010]
( 2 ) Further, in the above (1), preferably, in the second procedure, the computer performs a process of newly designing the machine part and then producing a model by a three-dimensional modeling apparatus and verifying the performance evaluation result. carry out.
[0011]
( 3 ) In the above ( 2 ), preferably, in the second procedure, the computer newly designed based on the model performance evaluation result in a process of producing a model by a three-dimensional modeling apparatus and verifying the performance evaluation result. Correct machine part shape again, perform performance re-evaluation, model remanufacturing and performance test.
[0012]
( 4 ) Further, in the above (1), preferably, in the first procedure, the computer calculates a three-dimensional shape necessary for performance evaluation from the point cloud data of the machine part shape measured by the shape measuring device. Perform the redefinition process.
[0013]
( 5 ) In the above ( 4 ), preferably, the computer redefines a three-dimensional shape necessary for performance evaluation from the point cloud data of the machine part shape measured by the shape measuring device in the first procedure. After performing the processing, the area division is performed on the machine part portion necessary for performance evaluation and the other portions.
[0014]
(6) In the above (1), preferably, use a high-energy X-ray CT as the shape measurement device.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
An embodiment of the present invention will be described with reference to FIGS.
[0018]
FIG. 1 is a flowchart showing the overall process of the information providing method for replacing machine parts according to the present embodiment, and FIG. 2 shows the installation status of the hydroelectric propeller turbine to which the present invention is applied in the present embodiment. It is a fragmentary sectional view shown.
[0019]
First, in FIG. 2, the water turbine portion 1 includes a spiral casing 2, a guide vane 3, a runner 4, and a draft tube 5. Water fed from a hydraulic pipe (not shown) reaches the runner 4 through the spiral casing 2 and the guide vane 3, and rotates it at a high speed to transmit power to the directly connected generator 6. The water colliding with the runner 4 is discharged from the draft tube 5.
[0020]
The runner 4 that has been used for a long period of time changes its blade thickness due to cavitation, wear, etc., making it difficult to maintain the performance of the initial design.
[0021]
FIG. 3 shows a method for processing measurement information. The runner 4 disassembled at the time of periodic inspection or the like is held by the crane 7 via a rope 7. The shape measuring device 8 is a three-dimensional measuring device typified by a contact probe type measuring device, and sends measurement data obtained by manipulating the surface of the runner 4 with the measuring probe 9 to the data processing device 10. Shape data is created and stored in the storage device 11. The data at this point is raw data of measurement results, and is a collection of point groups representing the shape of the object (see FIG. 5).
[0022]
In order to perform performance evaluation such as energy conversion efficiency, cavitation characteristics, and pressure loss of a blade using numerical analysis, it is necessary to convert the point cloud data into data representing the surface shape of the object. Therefore, the computer 12 converts the surface shape data to leverage the shape data in numerical analysis (see FIG. 5). At this time, after performing the process of redefining the three-dimensional shape necessary for performance evaluation from the measured point cloud data of the machine part shape, the region is divided into the machine part part required for performance evaluation and the other parts. carry out. Next, performance evaluation such as efficiency, cavitation characteristics, pressure loss, etc. of the existing machine is performed by numerical fluid analysis (see FIG. 6) based on the data, and evaluation data (performance evaluation table of the existing machine) 13 is obtained. The data is created and stored in the storage device of the computer 12.
[0023]
Next, the optimum design of the runner shape is performed in a state in which the restricted portions, for example, the outer diameter of the runner 4 shown in FIG. 2 , the outer diameter of the hub portion 4a to which the runner 4 is attached, and the guide vanes 3 are fixed. At the same time, performance evaluation such as efficiency, cavitation characteristics, pressure loss, etc. is performed to create performance evaluation data (performance evaluation table of new design machine) 14 of the new design machine, and this data is stored in the storage device of the computer 12.
[0024]
A performance evaluation flowchart will be described with reference to FIG.
Step 101: A performance evaluation request is received from a hydraulic machine user.
Step 102: The shape of the existing runner is measured with a three-dimensional measuring device.
Step 103: The point cloud data of the measurement result is converted into shape data representing the surface shape.
Step 104: Perform performance evaluation by numerical fluid analysis based on the obtained shape data.
Step 105: Optimum design of the shape of the runner is performed with the dimensions of the constraint portion fixed.
Step 106: Based on the obtained optimum shape data, performance evaluation of the redesign runner shape is performed.
Step 107: Create a performance comparison table between the existing machine and the newly designed machine.
Step 108: Submit a performance comparison table to the hydraulic machine user.
The contents of implementation in each process will be described in detail below.
[0025]
In step 102 in which the shape of the existing runner is measured by the three-dimensional measuring device, the blade shape of the rotor blade portion of the hydraulic machine taken out from the actual plant is measured by the three-dimensional shape measuring device. As the three-dimensional shape measuring apparatus, a contact probe type, a non-contact laser type, an X-ray CT apparatus or the like is used. FIG. 3 shows a case where a contact probe type measuring device is used.
[0026]
FIG. 4 shows a case where an X-ray CT apparatus is used for shape measurement.
[0027]
In FIG. 4, an X-ray 18 is irradiated to a runner (subject) 17 placed on the turntable 16 of the X-ray CT apparatus 15. Shape data is created by the data processing device 19 and stored in the storage device 20. Although there is a limit on the maximum measurable dimension in the measurement by the X-ray CT apparatus, there is a feature that internal measurement is possible, which cannot be measured by the contact probe type measuring apparatus.
[0028]
In step 103 for converting the point cloud data of the measurement result into shape data representing the surface shape, the point cloud data on the blade surface is obtained by measurement as shown in FIG. 5, and the free-form surface connecting these point clouds is processed by software. To generate a three-dimensional shape.
[0029]
In step 104 where the performance is evaluated by numerical fluid analysis based on the obtained shape data, the flow state of the flow path between the blades having the obtained blade shape is analyzed, and the flow velocity in the space between the blades as shown in FIG. Distribution and pressure distribution can be obtained under any flow conditions. In FIG. 6, 3 ′ is a wing of the runner 4. The performance of the wing is evaluated from these analysis results. The performance to be evaluated includes energy conversion efficiency η, cavitation characteristics, QH curve representing the relationship between the flow rate Q and the head H, and the like.
[0030]
In step 105 for optimal design of the shape of the runner, a blade shape with higher efficiency, less cavitation, and a small change rate of the QH curve is obtained from performance evaluation based on the measured blade shape. In the process, these dimensions are evaluated while changing the blade shape with the dimensions of the constraint portion fixed, and finally, a shape that satisfies the plurality of performances is selected.
[0031]
In step 106 for evaluating the performance of the redesigned runner shape based on the obtained optimum shape data, finally, the performance evaluation is performed on the blade shape that most satisfies a plurality of performances. In this case, the performance of the blade can be evaluated not only by fluid analysis but also by creating a model runner based on the optimized blade shape and performing a model performance test. The evaluation process in this case will be described later.
[0032]
In step 107 for creating a performance comparison table between the existing machine and the newly designed machine, the results of the evaluation based on the shape of the existing runner and the performance evaluation results of the newly designed machine obtained by the optimum design are compared and summarized. As a design performance comparison table, energy conversion efficiency η, cavitation characteristics, and QH curve representing the relationship between flow rate Q and head H are shown for both the blade shape based on the measurement results and the blade shape obtained by the new design. Organize as a numerical comparison table. Moreover, you may display with the graph of a format as shown in FIG.
[0033]
Through the above process, we will provide customers who have existing runners with the performance evaluation results of existing machines and information on newly designed machines with improved performance. In this case, for the information to be provided, compensation is collected as normal equipment maintenance costs and consultation costs for new designs.
[0034]
Another embodiment of the present invention will be described with reference to FIGS.
[0035]
FIG. 8 shows an embodiment of a process (a method for providing a replacement part for a machine part) of manufacturing a wing having a newly designed shape and replacing it with an existing wing. Steps 101 to 108 in FIG. 8 are the same as those in FIG. After that, based on the information provided, an order for replacement of the wing is received from the customer (step 108 '), and a new design wing for replacement is manufactured in an actually optimally designed shape (step 109). Is delivered (step 110) and assembled and installed (step 111). In other words,
Step 108 ': An order for replacing the wing is received from the customer.
Step 109: A new design wing for replacement is produced with an optimally designed shape.
Step 110: Send the manufactured wing to the customer.
Step 111: Assemble and install the sent wing.
[0036]
FIG. 9 shows an embodiment in which a model runner is used to create replacement information.
[0037]
In FIG. 9, after redesigning the wing (step 105), instead of numerical analysis, a new designed wing shape model is produced by a three-dimensional modeling apparatus called RP (rapid prototyping) (step 206), and thereafter A performance test is performed (step 207), a performance comparison table between the existing machine and the newly designed machine is created (step 208), and the information is provided to the customer (step 106). In other words,
Step 206: A model runner with a new design is created by the three-dimensional modeling apparatus.
Step 207: The model runner is incorporated into the performance test apparatus and a performance test is performed.
Step 208: Create a performance comparison table between the existing machine and the newly designed machine.
Step 209: A performance comparison table is submitted to the hydraulic machine user.
[0038]
FIG. 10 shows an embodiment of a replacement part providing method after receiving an order for replacement of parts based on the replacement information provided in the process of FIG. As in the process shown in FIG. 8, when a wing replacement order is received from the customer based on the information provided (step 108 '), a new design wing for replacement is produced with the actually optimally designed shape (step 109). The design information and the manufactured wing are delivered to (step 110), and assembled and installed (step 111).
[0039]
If a model is created by a three-dimensional modeling apparatus and a performance test is performed as in the present embodiment, a more accurate performance evaluation can be performed.
[0040]
FIG. 11 shows a method of manufacturing a new designed blade shape model by RP (rapid prototyping) instead of numerical analysis in the processes of FIGS. In the present embodiment, a newly designed runner blade model, that is, a model runner 21 is created by the three-dimensional modeling apparatus 22. The created model runner 21 is incorporated in the model testing device 23, and test data is created by the data processing device 24 and stored in the storage device 25. In parallel, a performance evaluation table 26 is created.
[0041]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the information which shows the grade of the performance improvement at the time of replacing the one part part of the existing machine, or the whole to a newly designed product can be provided.
[0042]
Further, according to the present invention, a newly designed product can be made to order based on the information, and the manufactured part can be provided.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a method for providing information for replacing a machine part according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a water wheel applied in an embodiment of the present invention.
FIG. 3 is a schematic diagram showing a measurement information processing method (using a contact probe measuring instrument) in an embodiment of the present invention.
FIG. 4 is a schematic view showing another measurement information processing method (using an X-ray CT apparatus) in an embodiment of the present invention.
FIG. 5 is an explanatory diagram of a shape creation method based on measurement information according to an embodiment of the present invention.
FIG. 6 is an explanatory diagram of a performance evaluation method in one embodiment of the present invention.
FIG. 7 is a diagram showing an example of a performance evaluation result display method according to an embodiment of the present invention.
FIG. 8 is a flowchart showing a method for providing a replacement part for a machine part according to another embodiment of the present invention.
FIG. 9 is a flowchart showing a method for providing information for replacing a machine part according to another embodiment of the present invention.
FIG. 10 is a flowchart showing a method for providing a replacement part for a machine part according to another embodiment of the present invention.
FIG. 11 is a diagram showing a method of producing a design blade shape model by RP (rapid prototyping) in the processes of FIGS. 9 and 10;
[Explanation of symbols]
1: turbine system 2: spiral casing 3: guide vane 4: runner 5: draft tube 6: generator 7: crane 8: three-dimensional measuring device 9: measuring probe 10: data processing device 11: storage device 12: computer 13 : Performance evaluation table of existing machine 14: Performance evaluation table of newly designed machine 15: X-ray CT device 16: Turntable 17: Subject 18: X-ray 19: Data processing device 20: Storage device 21: Model runner 22: Tertiary Original modeling device 23: Model testing device 24: Data processing device 25: Storage device 26: Performance evaluation table

Claims (6)

A shape measuring device for measuring the shape of an existing machine part, a data processing device for processing the measurement data generated by the shape measuring device to create shape data of the machine part, and a computer for processing the shape data In a method for providing information for replacement of machine parts by a system equipped with
The said computer is converted into a surface shape Jode over data that can take advantage of the shape data in the numerical analysis, the performance evaluation was carried out the surface-type Jode over data based, to create the evaluation data of the machine parts 1 procedure,
Using the surface shape data of the machine part , the computer evaluated the performance by changing the shape of the machine part in a state where the dimensions of the restricted part of the machine part were fixed , and created in the first procedure A machine composed of a second procedure for obtaining a shape with higher performance than the evaluation data to newly design a shape for improving the performance of the machine part and creating performance evaluation data for the newly designed machine part. Information providing method for replacement of parts.   2. The information providing method for replacing a machine part according to claim 1, wherein, in the second step, the computer newly designs the machine part, and then produces a model by a three-dimensional modeling apparatus and verifies a performance evaluation result. A method for providing information for replacement of mechanical parts, characterized in that:   3. The information providing method for replacing a machine part according to claim 2, wherein the computer, in the second step, uses a three-dimensional modeling apparatus to produce a model and verify the performance evaluation result based on the model performance evaluation result. A method for providing information for replacement of a machine part, wherein the shape of the newly designed machine part is corrected again, and performance re-evaluation, model remanufacturing and performance test are performed.   2. The information providing method for replacing a mechanical part according to claim 1, wherein the computer uses the three-dimensional shape necessary for performance evaluation from the point cloud data of the mechanical part shape measured by the shape measuring device in the first procedure. A method for providing information for replacing a machine part, characterized in that a process for redefining the machine part is performed.   5. The information providing method for replacing a machine part according to claim 4, wherein the computer uses a three-dimensional shape necessary for performance evaluation from point cloud data of the machine part shape measured by the shape measuring device in the first procedure. After performing the process of redefining, the machine part replacement information providing method is characterized in that the area division is performed on the machine part part necessary for performance evaluation and the other part.   2. The information providing method for replacing a machine part according to claim 1, wherein a high-energy X-ray CT is used as the shape measuring device.

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