CN110188411B - Design and processing method of centrifugal compressor welding end plate - Google Patents
Design and processing method of centrifugal compressor welding end plate Download PDFInfo
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- CN110188411B CN110188411B CN201910387756.9A CN201910387756A CN110188411B CN 110188411 B CN110188411 B CN 110188411B CN 201910387756 A CN201910387756 A CN 201910387756A CN 110188411 B CN110188411 B CN 110188411B
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Abstract
The invention discloses a design and processing method of a welding end plate of a centrifugal compressor, relates to the technical field of compressors, and mainly aims to improve the working efficiency of the centrifugal compressor and optimize the performance of the centrifugal compressor. The method comprises the following steps: acquiring a normal conical end plate model of a welding end plate of a centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor; rotating the right conical end plate model to obtain an inclined section of the right conical end plate model; intercepting the positive conical end plate model by utilizing the excircle end surface of the inclined section, and determining a conical part at the lower part of the intercepted positive conical end plate model as an irregular conical end plate model; and combining the irregular conical end plate model and the plane end plate model into a centrifugal compressor welding end plate model, and determining the size structure of the centrifugal compressor welding end plate according to the centrifugal compressor welding end plate model. The invention is suitable for the design and processing of the welding end plate of the centrifugal compressor.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a design and processing method of a welding end plate of a centrifugal compressor.
Background
The centrifugal compressor is a vane rotary compressor, in which the centrifugal force action given to gas by the impeller rotating at high speed and the diffusion action given to gas in the diffusion channel can raise the gas pressure.
At present, the welding end plate of the centrifugal compressor is generally composed of a positive conical end plate and a plane end plate, the welding end plate of the centrifugal compressor is spliced by welding the positive conical end plate, the plane end plate and a sealing body, however, the working performance of the centrifugal compressor can be influenced by the welding end plate of the centrifugal compressor composed of the positive conical end plate through an actual pneumatic calculation result, the working efficiency of the centrifugal compressor is low, and the working performance of the centrifugal compressor is not optimized.
Disclosure of Invention
The invention provides a design and processing method of a welding end plate of a centrifugal compressor, which mainly aims to improve the working efficiency of the centrifugal compressor and optimize the performance of the centrifugal compressor.
According to a first aspect of the present invention, there is provided a method of designing a welded end plate for a centrifugal compressor, comprising:
acquiring a normal conical end plate model of a welding end plate of a centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor;
rotating the positive conical end plate model to obtain an inclined section of the positive conical end plate model;
intercepting the positive conical end plate model by utilizing the excircle end surface of the inclined section, and determining a conical part at the lower part of the intercepted positive conical end plate model as an irregular conical end plate model;
and combining the irregular conical end plate model and the plane end plate model into a centrifugal compressor welding end plate model, and determining the size structure of the centrifugal compressor welding end plate according to the centrifugal compressor welding end plate model.
According to a second aspect of the present invention, there is provided a method for machining a welded end plate of a centrifugal compressor, comprising:
obtaining a dimensional structure of an irregular tapered end plate and a planar end plate obtained by the design method of a welded end plate of a centrifugal compressor according to any one of claims 1 to 4;
acquiring an expanded pattern of the irregular conical end plate and an expanded pattern of the regular conical end plate according to the size structure of the irregular conical end plate;
combining the unfolded pattern of the irregular conical end plate and the unfolded pattern of the positive conical end plate to obtain a combined pattern of the irregular conical end plate and the positive conical end plate;
and processing the irregular conical end plate according to the synthetic pattern, and combining the processed irregular conical end plate and the plane end plate into a centrifugal compressor welding end plate.
Compared with the mode that the welding end plate of the conventional centrifugal compressor is generally composed of a forward conical end plate and a plane end plate, the design and processing method of the welding end plate of the centrifugal compressor can obtain a forward conical end plate model of the welding end plate of the centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor; rotating the regular conical end plate model to obtain an inclined section of the regular conical end plate model; the outer circle end face of the inclined section can be used for intercepting the normal conical end plate model, and the conical part at the lower part of the intercepted normal conical end plate model is determined to be an irregular conical end plate model; meanwhile, the irregular conical end plate model and the plane end plate model are combined into a centrifugal compressor welding end plate model, the size structure of the centrifugal compressor welding end plate is determined according to the centrifugal compressor welding end plate model, the welding end plate combined by the irregular conical end plate is favorable for optimizing the actual pneumatic calculation result of the centrifugal compressor, the maneuvering performance of the compressor is optimized, the working efficiency of the compressor is improved, and the actual operation requirement of the centrifugal compressor is met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 illustrates a flow chart of a method for designing a welded end plate of a centrifugal compressor according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating another method for designing a welded end plate for a centrifugal compressor according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for machining a welded end plate of a centrifugal compressor according to an embodiment of the invention;
FIG. 4 is a flow chart illustrating another method of machining a welded end plate for a centrifugal compressor according to an embodiment of the present invention;
FIG. 5 shows a schematic structural view of an irregular tapered end plate of an embodiment of the present invention;
FIG. 6 shows a schematic representation of a three-dimensional sheet metal model of an irregular tapered end plate of an embodiment of the present invention;
FIG. 7 shows a schematic view of an expanded pattern of irregular tapered end plates of an embodiment of the present invention;
FIG. 8 shows a schematic diagram of a composite pattern of an irregular tapered end plate and a positive tapered end plate of an embodiment of the present invention;
FIG. 9 shows a schematic view of a profiled vertical line of an irregular tapered end plate of an embodiment of the present invention;
FIG. 10 shows a three-dimensional schematic view of an end face snap arc template on an irregular tapered end plate of an embodiment of the present invention;
FIG. 11 illustrates a front view of an end face snap arc template on an irregular tapered end plate of an embodiment of the present invention;
FIG. 12 shows a three-dimensional schematic view of an end face snap arc template under an irregular tapered end plate of an embodiment of the present invention;
FIG. 13 shows a schematic view of a welded end plate of a centrifugal compressor in accordance with an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings and embodiments. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
As background art, at present, a welded end plate of a centrifugal compressor generally consists of a positive conical end plate and a planar end plate, and the welded end plate of the centrifugal compressor is spliced by welding the positive conical end plate, the planar end plate and a sealing body, however, according to an actual pneumatic calculation result, the welded end plate of the centrifugal compressor consisting of the positive conical end plate affects the working performance of the centrifugal compressor, causes low working efficiency of the centrifugal compressor, and does not optimize the working performance of the centrifugal compressor.
In order to solve the above problem, an embodiment of the present invention provides a method for designing a welded end plate of a centrifugal compressor, as shown in fig. 1, the method including:
101. and acquiring a normal conical end plate model of the welding end plate of the centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor.
For the embodiment of the invention, the structural sizes of the positive conical end plate and the planar end plate are obtained according to the two-dimensional drawings of the positive conical end plate and the planar end plate of the welding end plate of the centrifugal compressor, and the positive conical end plate model of the welding end plate of the centrifugal compressor and the planar end plate model of the welding end plate of the centrifugal compressor are established in the preset three-dimensional modeling software according to the structural sizes, wherein the preset three-dimensional modeling software can be but is not limited to CAD software and UG software.
102. And rotating the positive conical end plate model to obtain the inclined section of the positive conical end plate model.
In the embodiment of the present invention, the irregular tapered end plate is a partially truncated regular tapered end plate, and an inclined cross section is obtained by rotating the regular tapered end plate, where the inclined cross section is used to truncate the regular tapered end plate, for example, an intersection line of a vertical interface where the regular tapered end plate model is located and a bisecting plane of the regular tapered end plate is taken as a rotation axis, and the regular tapered end plate model is deflected by 15 ° to the left around the rotation axis to obtain an inclined cross section of the regular tapered end plate model, as shown in fig. 5, an included angle of the inclined cross section is 80 °, a taper of the inclined cross section is 75 °, or the inclined cross section of the regular tapered end plate model is rotated by 10 ° to the right with an 80 ° cusp perpendicular to an axis of the structural diagram as a rotation center, so as to obtain an inclined cross section of the regular tapered end plate model.
103. And intercepting the normal conical end plate model by using the excircle end surface of the inclined section, and determining the conical part at the lower part of the intercepted normal conical end plate model as an irregular conical end plate model.
In the embodiment of the present invention, the regular tapered end plate model is cut out by using the inclined cross section obtained by rotating the regular tapered end face model to obtain the cut-out lower part cone part of the regular tapered end plate model, the cone part is determined as the irregular tapered end plate model, the irregular tapered end plate is in a special-shaped end plate structure with the upper end face and the lower end face being not parallel, further, the cut-out circular arc curve on the regular tapered end plate model is determined as the outer circle expansion curve of the upper end face of the irregular tapered end plate model, the distance from the upper end face to the median plane of the irregular tapered end plate in the model is calculated, the lower end face of the cut-out cone part is the same as the lower end face of the regular tapered end plate, the lower end face of the regular tapered end plate is determined as the lower end face of the irregular tapered end plate, the distance from the median plane of the lower end face of the regular tapered end plate is known, therefore, the distance from the lower end face to the median plane of the irregular tapered end plate can be known, the specific structure of the irregular tapered end plate model is determined according to the upper end face of the irregular tapered end plate model and the lower end face of the irregular tapered end plate model, as shown in fig. 5, the irregular tapered end plate is in the radial direction, and the irregular structure is in the asymmetric structure.
104. And combining the irregular conical end plate model and the plane end plate model into a centrifugal compressor welding end plate model, and determining the size structure of the centrifugal compressor welding end plate according to the centrifugal compressor welding end plate model.
According to the embodiment of the invention, the determined irregular conical end plate model and the plane end plate model are combined to obtain the centrifugal compressor welding end plate model, the structural size of the irregular conical end plate model and the structural size of the plane end plate model are known, so that the structural size of the centrifugal compressor welding end plate can be obtained, the centrifugal compressor welding end plate can be processed according to the structural size of the centrifugal compressor welding end plate, the centrifugal compressor driving efficiency using the irregular conical end plate is higher than the driving efficiency of a compressor using a positive conical end plate through an actual pneumatic calculation result, and the irregular conical end plate is beneficial to optimizing the maneuvering performance of the centrifugal compressor.
Compared with the mode that the welding end plate of the conventional centrifugal compressor is generally composed of a forward conical end plate and a plane end plate, the design method of the welding end plate of the centrifugal compressor can obtain a forward conical end plate model of the welding end plate of the centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor; rotating the regular conical end plate model to obtain an inclined section of the regular conical end plate model; the outer circle end face of the inclined section can be utilized to intercept the positive conical end plate model, and the conical part at the lower part of the intercepted positive conical end plate model is determined to be an irregular conical end plate model; meanwhile, the irregular conical end plate model and the plane end plate model are combined into a centrifugal compressor welding end plate model, the size structure of the centrifugal compressor welding end plate is determined according to the centrifugal compressor welding end plate model, the welding end plate combined by the irregular conical end plate is favorable for optimizing the actual pneumatic calculation result of the centrifugal compressor, the maneuvering performance of the compressor is optimized, the working efficiency of the compressor is improved, and the actual operation requirement of the centrifugal compressor is met.
Further, to better explain the design process of the welded end plate of the centrifugal compressor for the irregular tapered end plate, as a refinement and an extension of the above embodiment, the embodiment of the present invention provides another design method of the welded end plate of the centrifugal compressor, as shown in fig. 2, the method includes:
201. and acquiring a normal conical end plate model of the welding end plate of the centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor.
For the embodiment of the invention, in the prior art, the welding end plate of the centrifugal compressor is formed by combining and splicing a positive conical end plate, a plane end plate and a sealing body to obtain a two-dimensional drawing of the positive conical end plate and the plane end face, a positive conical end plate model and a plane end plate model are constructed in preset three-dimensional modeling software according to the size structure of the positive conical end plate and the size structure of the plane end plate in the drawing, and the positive conical end plate model is used for obtaining an irregular conical end plate model so as to combine the irregular conical end plate model and the plane end plate model into the welding end plate model of the compressor.
202. And determining the intersection line of the vertical section of the normal conical end plate model and the bisection plane of the normal conical end plate model as a rotating shaft center.
203. And rotating the forward conical end plate model by a preset angle around the rotating shaft center to form an inclined section.
For example, as shown in fig. 5, the forward conical end plate model is rotated around a rotation axis to deflect left by 15 °, or is rotated right by 10 ° with a straight line of which a sharp point of 80 ° in fig. 5 is perpendicular to a schematic diagram as an axis, to obtain an inclined cross section with an included angle of 80 ° and a taper of 75 °, and the inclined cross section is used for cutting the forward conical end plate model to obtain the irregular conical end plate model.
204. And intercepting the positive conical end plate model by utilizing the excircle end surface of the inclined section, and determining the conical part at the lower part of the intercepted positive conical end plate model as an irregular conical end plate model.
For the embodiment of the present invention, in order to determine the upper end surface and the lower end surface of the irregular tapered end plate, step 204 specifically includes: intercepting the positive conical end plate model by utilizing the excircle end surface of the inclined section to obtain a conical part at the lower part of the positive conical end plate model, wherein the conical part comprises an upper end surface and a lower end surface, and the lower end surface of the conical part is the lower end surface of the positive conical end plate model; determining an upper end surface of the tapered portion as an upper end surface of the irregular tapered end plate model; determining a lower end face of the conical part as a lower end face of the irregular conical end plate model; and determining the irregular conical end plate model according to the upper end face of the irregular conical end plate model and the lower end face of the irregular conical end plate model, wherein the distance from the lower end face of the irregular conical end plate model to the median plane is equal to the distance from the lower end face of the regular conical end plate model to the median plane, the distance is a known distance, the lower end face of the irregular conical end plate model is coincided with the lower end face of the regular conical end plate model, and the distance from the upper end face of the irregular conical end plate model to the median plane is obtained by calculating the distance from a truncated curve on the regular conical end face in the model to the median plane. Meanwhile, the upper end surface of the irregular tapered end plate model and the lower end surface of the irregular tapered end plate model are not parallel to each other, and the bending direction of the upper end surface of the irregular tapered end plate model is consistent with the bending direction of the lower end surface of the irregular tapered end plate model.
205. And combining the irregular conical end plate model and the plane end plate model into a centrifugal compressor welding end plate model, and determining the size structure of the centrifugal compressor welding end plate according to the centrifugal compressor welding end plate model.
According to the embodiment of the invention, the welding end plate of the centrifugal compressor is formed by combining and splicing the irregular conical end plate and the plane end plate, the centrifugal compressor is utilized to improve the driving efficiency, meanwhile, the integral size structure of the welding end plate of the centrifugal compressor can be determined according to the size structure of the irregular conical end plate and the size structure of the plane end plate in the model, and the irregular conical end plate and the plane end plate are processed according to the size structure and combined to form the welding end plate of the centrifugal compressor.
Compared with the mode that the welding end plate of the conventional centrifugal compressor is generally composed of a forward conical end plate and a plane end plate, the design method of the welding end plate of the centrifugal compressor provided by the invention can obtain a forward conical end plate model of the welding end plate of the centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor; rotating the regular conical end plate model to obtain an inclined section of the regular conical end plate model; the outer circle end face of the inclined section can be used for intercepting the normal conical end plate model, and the conical part at the lower part of the intercepted normal conical end plate model is determined to be an irregular conical end plate model; meanwhile, the irregular conical end plate model and the plane end plate model are combined to form a centrifugal compressor welding end plate model, the size structure of the centrifugal compressor welding end plate is determined according to the centrifugal compressor welding end plate model, the welding end plate combined by the irregular conical end plate is favorable for optimizing the actual pneumatic calculation result of the centrifugal compressor, the maneuvering performance of the compressor is optimized, the working efficiency of the compressor is improved, and the actual operation requirement of the centrifugal compressor is met.
In order to solve the problems that a centrifugal compressor with a welded end plate formed by combining forward conical end plates in the prior art is low in working efficiency and not beneficial to optimizing the mobility of the centrifugal compressor, the embodiment of the invention provides a method for machining the welded end plate of the centrifugal compressor, and as shown in fig. 3, the method comprises the following steps:
301. obtaining the dimensional structure of an irregular tapered end plate obtained by the design method of a welded end plate of a centrifugal compressor according to any one of claims 1 to 4, and a planar end plate.
For the embodiment of the present invention, the structural dimensions of the welded end plate of the centrifugal compressor obtained by the above design method for the welded end plate of the centrifugal compressor are obtained, where the structural dimensions of the welded end plate of the centrifugal compressor include the dimensional structure of the irregular tapered end plate and the dimensional structure of the planar end plate, and according to the dimensional structure of the planar end plate, the planar end plate entity is machined, and according to the dimensional structure of the irregular tapered end plate, the machining is performed in the machining manner in the embodiment of the present invention.
302. And acquiring the expansion pattern of the irregular tapered end plate and the expansion pattern of the positive tapered end plate according to the size structure of the irregular tapered end plate.
According to the embodiment of the invention, according to the actual size structure of the irregular conical end plate, solid modeling is carried out in preset software, the preset software can be but is not limited to Solid Works software, specifically, according to the size structure of the irregular conical end plate, a sheet metal module of the irregular conical end plate with the same size is selected from the Solid Works software, as shown in fig. 6, then the sheet metal module of the irregular conical end plate is flattened by using the expansion function of the sheet metal module and taking a bus on one side of the irregular conical end plate as a flattening reference, so that an accurate expansion pattern of the irregular conical end plate is obtained, as shown in fig. 7, in addition, the size structure of the regular conical end plate with the same size on the lower end surface of the irregular conical end plate is obtained, the sheet metal module of the regular conical end plate with the same size is selected from the Solid Works software, then the sheet metal module of the regular conical end plate is flattened by using the expansion function of the sheet metal module and taking the bus on one side of the regular conical end plate as a reference, so that the expansion pattern of the regular conical end plate is obtained.
303. And combining the expanded pattern of the irregular conical end plate and the expanded pattern of the positive conical end plate to obtain a composite pattern of the irregular conical end plate and the positive conical end plate.
For the embodiment, because the irregular tapered end plate cannot be directly subjected to serial compression molding and the arc curvature can not be detected, the unfolded pattern of the irregular tapered end plate and the unfolded pattern of the positive tapered end plate need to be combined, when the positive tapered end plate meets the preset arc curvature after serial compression molding, the irregular tapered end plate also meets the preset arc curvature, that is, the irregular tapered end plate meets the processing and molding requirements, further, the symmetric center line of the unfolded pattern of the irregular tapered end plate and the symmetric center line of the unfolded pattern of the positive tapered end plate are taken as the combination reference, the unfolded pattern of the irregular tapered end plate and the unfolded pattern of the positive tapered end plate are combined to obtain the combined pattern of the irregular tapered end plate and the positive tapered end plate, and as shown in fig. 8, the irregular tapered end plate is processed according to the combined pattern.
304. And machining the irregular conical end plate according to the synthetic pattern, and combining the machined irregular conical end plate and the machined plane end plate into a centrifugal compressor welding end plate.
In the embodiment of the present invention, a predetermined number of auxiliary cutting lines are set along an outer circle expansion curve of an upper end surface of an irregular tapered end plate according to a synthetic pattern of the irregular tapered end plate and a regular tapered end plate, the auxiliary cutting lines may be rectangular, and the length, width and spacing of the rectangles may be 100mm,50mm and 20mm in sequence, holes are punched according to the set auxiliary cutting lines, as shown in fig. 8, after the irregular tapered end plate is formed by serial compression, remainders are cut along the edges of the rectangular auxiliary cutting lines, and in order to meet the span requirement of a compression mold, 300mm of compression remainders are respectively extended outwards on the left and right sides of the upper end surface of the regular tapered end plate, and after the irregular tapered end plate is formed by serial compression, the 300mm of compression remainders are also cut, and further, the upper end surface and the lower end surface of the irregular tapered end plate in the synthetic pattern are respectively used as a reference, and no compression allowance of 300mm is included, the preset number of the compression vertical lines are planned at equal intervals between the upper end face and the lower end face of the irregular tapered end plate, it is to be noted that the number of the compression vertical lines is not too small, the interval between the compression vertical lines on the upper end face of the irregular tapered end plate is ensured to be less than or equal to 50mm, so as to ensure the compression precision of the irregular tapered end plate, as shown in fig. 9, in the compression process, the irregular tapered end plate is sequentially compressed along the compression vertical lines, in order to further determine whether the bending radian formed by the irregular tapered end plate in the forming process meets the preset bending radian requirement, after each compression process, the radians formed by the upper end face and the lower end face of the irregular tapered end plate are detected, the detection tools can be an upper end face arc clamping sample plate and a lower end face arc clamping sample plate, the upper end face arc clamping sample plate is shown in fig. 10 and fig. 11, the lower end face arc clamping sample plate is shown in fig. 12, the upper end face clamping arc sample plate is arranged opposite to the upper end face of the irregular conical end plate, meanwhile, the vertical handle of the upper end face clamping arc sample plate is aligned with the profiling vertical line of the irregular conical end plate, if the distance between the upper end face of the irregular conical end plate and the upper end face clamping arc sample plate is smaller than or equal to 0.5mm, the bending radian formed by the upper end face of the irregular conical end plate in the forming process meets the preset bending radian requirement, the process of detecting the forming radian of the lower end face of the irregular conical end plate by using the lower end face clamping arc sample plate in the same way is the same as the process, the residual material of the irregular conical end plate meeting the forming radian requirement is finally removed, and the irregular conical end plate and the plane end plate are welded to form a centrifugal compressor welding end plate.
Compared with the mode that the welding end plate of the conventional centrifugal compressor is generally composed of a regular conical end plate and a planar end plate, the method for machining the welding end plate of the centrifugal compressor can obtain the size structure of the irregular conical end plate and the planar end plate; acquiring an expansion pattern of the irregular conical end plate and an expansion pattern of the regular conical end plate according to the size structure of the irregular conical end plate; the unfolded pattern of the irregular conical end plate and the unfolded pattern of the positive conical end plate can be combined to obtain a composite pattern of the irregular conical end plate and the positive conical end plate; meanwhile, the irregular conical end plate is processed according to the synthetic pattern, the processed irregular conical end plate and the plane end plate are combined to form a centrifugal compressor welding end plate, the welding end plate formed by combining the irregular conical end plates is beneficial to optimizing the actual pneumatic calculation result of the centrifugal compressor, the maneuvering performance of the compressor is optimized, the working efficiency of the compressor is improved, and the actual operation requirement of the centrifugal compressor is met.
Further, in order to better explain the processing procedure of the irregular tapered end plate of the welded end plate of the centrifugal compressor, as a refinement and an extension of the above embodiment, the embodiment of the present invention provides another processing method of the welded end plate of the centrifugal compressor, as shown in fig. 4, the method includes:
401. obtaining the dimensions of the non-regular conical end plate and the planar end plate obtained by the design method of a welded end plate of a centrifugal compressor according to any of claims 1 to 4.
For the embodiment of the present invention, the process of obtaining the size structure of the irregular tapered end plate and the planar end plate is the same as step 301, and is not described herein again.
402. And acquiring the expansion pattern of the irregular tapered end plate and the expansion pattern of the positive tapered end plate according to the size structure of the irregular tapered end plate.
For the embodiment of the present invention, in order to ensure that the irregular tapered end plate can be formed, step 402 further includes: according to the size structure of the irregular conical end plate, obtaining a sheet metal module corresponding to the irregular conical end plate in preset software; flattening the metal plate module corresponding to the irregular conical end plate by taking a bus on one side as a reference to obtain an expansion pattern of the irregular conical end plate; according to the size structure of the irregular conical end plate, obtaining a metal plate module corresponding to the regular conical end plate which is the same as the lower end surface of the irregular conical end plate in preset software; and flattening the metal plate module corresponding to the positive conical end plate by taking a bus on one side as a reference to obtain an expansion pattern of the positive conical end plate, combining the expansion pattern of the irregular conical end plate and the expansion pattern of the positive conical end plate, and taking the combined expansion patterns of the irregular conical end plate and the positive conical end plate as a processing model of the irregular conical end plate.
403. And taking the symmetrical center line of the unfolded pattern of the irregular conical end plate and the symmetrical center line of the unfolded pattern of the regular conical end plate as the merging reference of the two patterns.
404. And combining the expanded pattern of the irregular conical end plate and the expanded pattern of the positive conical end plate according to the combined reference to obtain a combined pattern of the irregular conical end plate and the positive conical end plate.
For the embodiment of the invention, in order to solve the problem that the irregular tapered end plate cannot be processed independently, the expanded pattern of the irregular tapered end plate and the expanded pattern of the regular tapered end plate are combined to obtain the composite pattern of the irregular tapered end plate and the regular tapered end plate, and the irregular tapered end plate is processed according to the composite pattern.
405. And machining the irregular conical end plate according to the synthetic pattern, and combining the machined irregular conical end plate and the machined plane end plate into a centrifugal compressor welding end plate.
For the embodiment of the present invention, in order to ensure the machining precision of the welded end plate and the tapered end plate of the centrifugal compressor, step 405 further includes: acquiring an excircle expansion curve of the upper end face of the irregular conical end plate according to the synthetic pattern; setting a preset number of rectangular auxiliary cutting lines along the excircle unfolding curve; drawing profiling vertical lines with preset quantity at equal intervals between the upper end face of the irregular conical end plate and the lower end face of the irregular conical end plate in the synthetic pattern; processing the irregular tapered end plate according to the auxiliary cutting line and the compression vertical lines, further sequentially performing series compression molding on the irregular tapered end plate along each compression vertical line to obtain a molded irregular tapered end plate, adopting a cold-state series compression molding mode for the molding scheme of the irregular tapered end plate, selecting a 1600-ton oil press as a press, and setting the effective working range of a workbench of the oil press to be 3000 multiplied by 3000mm 2 Specifically, the irregular tapered end plates are subjected to series compression molding along each compression vertical line in sequenceWhen one-time series-compression molding treatment is finished, respectively detecting whether the bending radian of the upper end surface of the irregular conical end plate and the bending radian of the lower end surface of the irregular conical end plate meet preset radians or not; if so, continuously carrying out profiling treatment on the irregular tapered end plate according to the next profiling vertical line of the irregular tapered end plate, and finally obtaining the formed irregular tapered end plate. In addition, the vertical plane and the height dimension of the upper end face and the lower end face of the irregular conical end plate are respectively used as references, cutting lines at the positions of the middle facets are divided according to the equidistant plane dimension of the middle facets, the bevel machining of the middle facets is realized by adopting a twice cutting mode according to the marked cutting lines, then the machining of the upper end face welding bevel and the lower end face welding bevel of the irregular conical end plate is realized by adopting a twice cutting mode respectively as references, therefore, the irregular conical end plate, the sealing body and the planar end plate all adopt bilateral X-shaped welding bevels, and finally the assembly welding of the irregular conical end plate, the planar end plate and the sealing body is realized through bevel welding seams and the welding end plate of the centrifugal compressor is combined, as shown in fig. 13, the welding end plate is beneficial to improving the driving efficiency of the centrifugal compressor.
Compared with the mode that the welding end plate of the conventional centrifugal compressor is generally composed of a regular conical end plate and a planar end plate, the method for machining the welding end plate of the centrifugal compressor can obtain the size structure of the irregular conical end plate and the planar end plate; acquiring an expansion pattern of the irregular conical end plate and an expansion pattern of the regular conical end plate according to the size structure of the irregular conical end plate; the unfolded pattern of the irregular conical end plate and the unfolded pattern of the positive conical end plate can be combined to obtain a composite pattern of the irregular conical end plate and the positive conical end plate; meanwhile, the irregular conical end plate is processed according to the synthetic pattern, the processed irregular conical end plate and the plane end plate are combined to form a welding end plate of the centrifugal compressor, the welding end plate formed by combining the irregular conical end plates is beneficial to optimizing the actual pneumatic calculation result of the centrifugal compressor, the maneuvering performance of the compressor is optimized, the working efficiency of the compressor is improved, and the actual operation requirement of the centrifugal compressor is met.
It will be apparent to those skilled in the art that the steps of the present invention described above may be implemented by a general purpose computing device, centralized on a single computing device or distributed across a network of computing devices, or alternatively, by program code executable by a computing device, such that the steps shown and described may be executed by a computing device stored in a memory device and, in some cases, executed out of order, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from a plurality of modules or steps. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A machining method for a welding end plate of a centrifugal compressor is characterized by comprising the following steps:
acquiring a normal conical end plate model of a welding end plate of a centrifugal compressor and a plane end plate model of the welding end plate of the centrifugal compressor;
rotating the positive conical end plate model to obtain an inclined section of the positive conical end plate model;
intercepting the normal conical end plate model by utilizing the excircle end surface of the inclined section, and determining a conical part at the lower part of the intercepted normal conical end plate model as an irregular conical end plate model;
combining the irregular conical end plate model and the planar end plate model into a centrifugal compressor welded end plate model, and determining the size structure of the centrifugal compressor welded end plate according to the centrifugal compressor welded end plate model;
the upper end surface of the irregular conical end plate model and the lower end surface of the irregular conical end plate model are not parallel to each other, and the bending direction of the upper end surface of the irregular conical end plate model is consistent with the bending direction of the lower end surface of the irregular conical end plate model;
obtaining the size structure of the obtained irregular conical end plate and a plane end plate;
acquiring an expanded pattern of the irregular conical end plate and an expanded pattern of the regular conical end plate according to the size structure of the irregular conical end plate;
combining the unfolded pattern of the irregular conical end plate and the unfolded pattern of the positive conical end plate to obtain a combined pattern of the irregular conical end plate and the positive conical end plate;
and processing the irregular conical end plate according to the synthetic pattern, and combining the processed irregular conical end plate and the plane end plate into a centrifugal compressor welding end plate.
2. The method of claim 1, wherein the rotating the forward conical end plate model to obtain the sloped cross-section of the forward conical end plate model comprises:
determining the intersection line of the vertical section of the forward conical end plate model and the bisection plane of the forward conical end plate model as a rotating shaft center;
and rotating the forward conical end plate model by a preset angle around the rotating axis to form an inclined section.
3. The method of claim 1, wherein the intercepting the positive tapered end plate model using the outer cylindrical end surface of the oblique section and determining the tapered portion of the intercepted positive tapered end plate model as an irregular tapered end plate model comprises:
intercepting the normal conical end plate model by utilizing the excircle end surface of the inclined section to obtain a conical part at the lower part of the normal conical end plate model, wherein the conical part comprises an upper end surface and a lower end surface, and the lower end surface of the conical part is the lower end surface of the normal conical end plate model;
determining an upper end face of the tapered portion as an upper end face of the irregular tapered end plate model;
determining a lower end face of the conical part as a lower end face of the irregular conical end plate model;
and determining the irregular conical end plate model according to the upper end surface of the irregular conical end plate model and the lower end surface of the irregular conical end plate model.
4. The method of claim 1, wherein obtaining the unfolded pattern of the irregular tapered end plates and the unfolded pattern of the positive tapered end plates according to the dimensional structure of the irregular tapered end plates comprises:
according to the size structure of the irregular conical end plate, obtaining a sheet metal module corresponding to the irregular conical end plate in preset software;
flattening the metal plate module corresponding to the irregular conical end plate by taking a bus on one side as a reference to obtain an expansion pattern of the irregular conical end plate;
according to the size structure of the irregular tapered end plate, obtaining a metal plate module corresponding to the positive tapered end plate which is the same as the lower end face of the irregular tapered end plate in preset software;
and flattening the metal plate module corresponding to the positive conical end plate by taking the bus on one side as a reference to obtain an expansion pattern of the positive conical end plate.
5. The method of claim 4, wherein combining the unfolded pattern of the irregular tapered end plates and the unfolded pattern of the positive tapered end plates to obtain a combined pattern of the irregular tapered end plates and the positive tapered end plates comprises:
taking the symmetrical center line of the unfolded pattern of the irregular conical end plate and the symmetrical center line of the unfolded pattern of the regular conical end plate as the merging reference of the two patterns;
and combining the expanded pattern of the irregular conical end plate and the expanded pattern of the positive conical end plate according to the combined reference to obtain a combined pattern of the irregular conical end plate and the positive conical end plate.
6. The method of claim 1, wherein machining the irregular tapered end plate according to the composite pattern comprises:
acquiring an excircle expansion curve of the upper end face of the irregular conical end plate according to the synthetic pattern;
setting a preset number of rectangular auxiliary cutting lines along the excircle unfolding curve;
drawing profiling vertical lines with preset quantity at equal intervals between the upper end face of the irregular conical end plate and the lower end face of the irregular conical end plate in the synthetic pattern;
and machining the irregular conical end plate according to the auxiliary cutting line and the profiling vertical line.
7. The method of claim 6, wherein machining the irregular tapered end plate according to the profiled vertical line comprises:
and sequentially carrying out serial pressure forming on the irregular conical end plate along each pressing vertical line to obtain the formed irregular conical end plate.
8. The method of claim 7, wherein said serially pressing said irregular tapered end plate along each vertical profiling line to obtain a formed irregular tapered end plate comprises:
sequentially carrying out series pressure forming on the irregular conical end plate along each pressure type vertical line, and when one-time series pressure forming treatment is finished, respectively detecting whether the bending radian of the upper end face of the irregular conical end plate and the bending radian of the lower end face of the irregular conical end plate meet preset radians or not;
if so, continuously carrying out profiling treatment on the irregular tapered end plate according to the next profiling vertical line of the irregular tapered end plate, and finally obtaining the formed irregular tapered end plate.
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