CN114249220A - Method for assembling lifting ring of centrifugal compressor welded shell - Google Patents
Method for assembling lifting ring of centrifugal compressor welded shell Download PDFInfo
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- CN114249220A CN114249220A CN202111560140.0A CN202111560140A CN114249220A CN 114249220 A CN114249220 A CN 114249220A CN 202111560140 A CN202111560140 A CN 202111560140A CN 114249220 A CN114249220 A CN 114249220A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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Abstract
The invention discloses a hanging ring assembling method of a centrifugal compressor welding shell, which comprises the steps of determining the placement position and the positioning angle of a hanging ring according to the structure of the welding shell; according to the positioning angle, carrying out mechanical analysis on the welding machine shell in a hoisting state, and outputting a hoisting ring size parameter table; the hanging ring size parameter table comprises the weight of the welded machine shell, the diameter of the hanging ring corresponding to the weight of the welded machine shell, the fillet radius of the hanging ring, the thickness of the hanging ring and the minimum distance between the hanging ring and the outer wall of the welded machine shell; and connecting the hanging ring on the welding shell according to the positioning angle and the size parameter table so as to complete the assembly of the hanging ring on the welding shell. According to the hanging ring assembling method of the centrifugal compressor welded shell, the hanging rings of various centrifugal compressor shells are designed according to the positioning angle and the size parameter table of the hanging ring, so that the hanging ring is reasonable in placement position and meets the strength requirement, the hanging ring parameter table has good universality, and the standardized requirement of the design of the hanging rings of various compressor shells is met.
Description
Technical Field
The invention relates to the technical field of centrifugal compressors, in particular to a method for assembling a hanging ring of a welded shell of a centrifugal compressor.
Background
In the process of welding and processing the centrifugal compressor welding shell, necessary hoisting or overturning processing needs to be carried out on the welding shell in order to meet the position requirements of flat welding, horizontal welding and the like and the working requirements of processing, overturning and the like, and meanwhile, the welding shell needs to be placed in combination with the welding requirements in combination with the horizontal position where the welding shell is located, and the welding shell comprises side-standing placement and upright placement.
In the actual production process, the hoisting, overturning and placing processes of the welding machine shell have no relevant operation standards, and constructors often rely on experience to weld the process hanging ring, lack reasonable strength calculation and set reasonable positions of the hanging ring, and have potential safety hazard phenomena violating safe operation regulations.
Therefore, a hoisting assembly method for a welded shell of a centrifugal compressor, which can reasonably place a hoisting ring and meet the strength requirement, needs to be researched urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for assembling the hanging ring of the centrifugal compressor welded shell, and solves the problems that in the prior art, the position of the hanging ring is unreasonable and the strength does not reach the standard due to the fact that constructors weld the shell hanging ring by experience.
The invention provides a method for assembling a hanging ring of a centrifugal compressor welding shell, which comprises the following steps:
determining the placement position of a lifting ring on a welding machine shell according to the structure of the welding machine shell, and determining the positioning angle of the lifting ring on the welding machine shell;
according to the positioning angle of the hanging ring, mechanical analysis is carried out on the welded shell in a hoisting state, and a size parameter table of the hanging ring is output; the size parameter table of the hanging ring comprises the weight of the welding shell, the diameter of the hanging ring corresponding to the weight of the welding shell, the fillet radius of the hanging ring, the thickness of the hanging ring and the minimum distance between the hanging ring and the outer wall of the welding shell;
and connecting the hanging ring on the welding shell according to the positioning angle of the hanging ring and the size parameter table of the hanging ring, and finishing the assembly of the hanging ring on the welding shell.
Further, the welding casing includes upper casing and lower casing, rings include upper casing rings and lower casing rings, rings are in the position of placing on the welding casing includes:
the upper shell lifting rings are positioned at two ends of the upper shell;
the lower shell lifting ring is positioned in the middle of the lower shell.
Further, the placement position of the hanging ring on the welding machine shell further comprises:
the edge of the upper shell hanging ring is not higher than the edge of the upper shell.
Further, the positioning angle of the hanging ring on the welding machine shell comprises:
an included angle between the upper shell lifting ring and the horizontal plane of the upper shell is 30-35 degrees;
the included angle of the lower shell lifting ring and the vertical direction of the horizontal plane of the lower shell is 30-45 degrees.
Further, the mechanical analysis of the welding machine shell in the hoisting state includes:
determining a dangerous section of the lifting ring, and calculating the area of the dangerous section;
carrying out stress analysis on the lifting ring according to the area of the dangerous section to obtain the shear stress on the lifting ring;
determining the yield strength of the welding enclosure according to the material of the welding enclosure;
and comparing the obtained shear stress on the lifting ring and the yield strength of the welding shell, and determining that the lifting ring meets the yield strength requirement.
Further, the size parameter table of the hanging ring further comprises:
the welding machine shell comprises an upper shell weight of the welding machine shell and a vertical distance between the edge of the hanging ring corresponding to the upper shell weight and the edge of the upper shell.
Further, the connecting rings on the welding casing includes:
arranging lifting ring holes on a plurality of lifting ring plates according to the size parameter table of the lifting ring, and respectively welding the plurality of lifting ring plates to an upper shell of the welded shell according to the positioning angle of the lifting ring to form a plurality of upper shell lifting rings;
and according to the size parameter table of the hanging rings and the positioning angle of the hanging rings, perforating the lower shell rib plates of the welded shell to form a plurality of lower shell hanging rings.
Further, the connecting the hanging ring on the welding machine shell comprises:
according to the size parameter table of the hanging rings and the positioning angles of the hanging rings, holes are formed in an upper shell rib plate of the welded shell to form a plurality of upper shell hanging rings;
and according to the size parameter table of the hanging rings and the positioning angle of the hanging rings, perforating the lower shell rib plates of the welded shell to form a plurality of lower shell hanging rings.
Further, connect rings still include on the welding casing:
the upper shell lifting rings are distributed at two axial ends of the upper shell and symmetrically arranged at two sides of the upper shell;
and the lower shell lifting rings are symmetrically arranged on the rib plates at two sides of the lower shell.
Further, the method for assembling the hanging ring of the welded shell of the centrifugal compressor further comprises the following steps:
designing the hoisting rings of various shells for centrifugal compressors with different structures according to the size parameter table of the hoisting rings;
and testing the lifting rings of the various shells to verify the safety and the reasonability of the lifting ring assembling method.
The invention provides a hanging ring assembly method of a centrifugal compressor welded shell, which is characterized in that the placement position of a hanging ring is determined according to the structure of the welded shell to determine the positioning angle of the hanging ring on the welded shell, mechanical analysis is carried out on the welded shell in a hoisting state according to the positioning angle to output a size parameter table of the hanging ring, and finally the hanging ring of various centrifugal compressor shells is designed according to the positioning angle and the size parameter table of the hanging ring, so that the placement position of the hanging ring is reasonable and meets the strength requirement, the hanging ring parameter table has good universality, and the standardized requirement of the design of the hanging ring of various compressor shells is met.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
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 specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method of assembling a lifting ring of a welded shell of a centrifugal compressor;
FIG. 2 is a parameter diagram of the actual size of an upper shell lifting ring of a welded shell of a centrifugal compressor;
FIG. 3 is a parameter diagram of the actual size of a lower shell ring of a welded shell of a centrifugal compressor;
FIG. 4 is a cross-sectional view of a centrifugal compressor welded shell bail;
FIG. 5 is a view of the position of the upper shell slinger on the upper shell of the welding machine shell;
FIG. 6 is a view of the position of the lower shell slings in the welded shell lower shell;
FIG. 7 is an ideal state diagram of the upper housing being hoisted;
FIG. 8 is a flow chart of a mechanical analysis of a weld enclosure;
FIG. 9 is a table of dimensional parameters for the upper shell bail;
FIG. 10 is a table of dimensional parameters of the lower housing lifting ring.
In the figure:
1-upper shell lifting ring, 2-upper shell, 3-lower shell lifting ring and 4-lower shell;
alpha-the positioning angle of the hanging ring, a-the vertical distance between the edge of the hanging ring and the edge of the machine shell, phi-the diameter of a hanging ring hole, R-the fillet of the hanging ring, D-the minimum distance between the hanging ring and the outer wall, and D-the thickness of the hanging ring.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a method for assembling a lifting ring of a centrifugal compressor welding shell, which is shown in figure 1 and comprises the steps of analyzing the structure of the welding shell and determining the positioning angle of the lifting ring on the welding shell; according to the positioning angle of the hanging ring, carrying out mechanical analysis on the welding machine shell in a hoisting state, and outputting a size parameter table of the hanging ring; referring to fig. 9 and 10, the size parameter table of the suspension ring includes the weight of the welded case, and the diameter of the suspension ring, the fillet radius of the suspension ring, the thickness of the suspension ring and the minimum distance of the suspension ring from the outer wall of the welded case corresponding to the weight of the welded case; and connecting the lifting ring to the welding shell according to the positioning angle of the lifting ring and the size parameter table of the lifting ring, and finishing the assembly of the lifting ring on the welding shell.
The invention provides a hanging ring assembly method of a centrifugal compressor welded shell, which is characterized in that the placement position of a hanging ring is determined according to the structure of the welded shell to determine the positioning angle of the hanging ring on the welded shell, mechanical analysis is carried out on the welded shell in a hoisting state according to the positioning angle to output a size parameter table of the hanging ring, and finally the hanging ring of various centrifugal compressor shells is designed according to the positioning angle and the size parameter table of the hanging ring, so that the placement position of the hanging ring is reasonable and meets the strength requirement, the hanging ring parameter table has good universality, and the standardized requirement of the design of the hanging ring of various compressor shells is met.
Specifically, in the above embodiment, the welding machine shell comprises an upper machine shell 2 and a lower machine shell 4, the hanging ring comprises an upper machine shell hanging ring 1 and a lower machine shell hanging ring 3, and the placing position of the hanging ring on the welding machine shell comprises that the upper machine shell hanging ring 1 is positioned at two ends of the upper machine shell 2; the lower case lifting ring 3 is positioned at the middle position of the lower case 4.
In the present embodiment, when the upper casing 2 is turned over, the upper casing 2 is lifted up and then ideally turned over as shown in fig. 7, so that it is easier to turn over the upper casing 2 by using two lifting hooks, one of the lifting hooks lifts the hanging post on the horizontal plane of the upper casing 2, and the other lifting hook lifts the upper casing hanging ring 1, so as to ensure the stability of turning over the upper casing 2, and since the end plates on both sides of the upper casing 2 have high rigidity, the plastic deformation is not generated when the end plates on both sides of the upper casing 2 are lifted up, so that the upper casing hanging rings 1 are disposed on both ends of the upper casing 2.
When the lower shell 4 is turned over vertically, the two lifting hooks can be directly used for simultaneously lifting the lower shell lifting rings 3, so that the stability of the lower shell 4 in the vertical turning process can be ensured by arranging the lower shell lifting rings 3 in the middle of the lower shell 4.
Further, the placing position of the hanging ring on the welding machine shell also comprises that the edge of the hanging ring 1 of the upper machine shell is not higher than the edge of the upper machine shell 2.
Furthermore, the positioning angle of the lifting ring on the welding shell comprises an included angle of 30-35 degrees between the lifting ring 1 of the upper shell and the horizontal plane of the upper shell 2; the included angle of the lower shell lifting ring 3 and the horizontal plane of the lower shell 4 in the vertical direction is 30-45 degrees.
In this embodiment, when the upper case 2 is turned over by using the upper case lifting ring 1, on one hand, the position of the center of gravity and the structural form of the upper case 2 are combined, and in order to ensure the stability and the convenience of the operation of turning over the upper case 2, it is required to satisfy that the horizontal planes of the upper case lifting ring 1 and the upper case 2 are both located on the same side of the center of gravity of the upper case 2, and therefore, an included angle between the upper case lifting ring 1 and the horizontal plane of the upper case 2 cannot be too large, and an angle of the included angle needs to be less than or equal to 35 °, and on the other hand, an angle between the upper case lifting ring 1 and the horizontal plane of the upper case 2 is also prevented from being too small, for example, when the included angle is less than 30 °, the edge of the upper case lifting ring 1 is higher than the edge of the case plate of the upper case 2, and subsequent processing is affected, and therefore, the included angle α between the horizontal planes of the upper case lifting ring 1 and the upper case 2 can be determined to be 30-35 °.
When the lower case 4 is vertically turned over by the lower case hanging ring 3, the lower case hanging ring 3 is located in the middle of the lower case 4, and the hoisting requirement on the lower case 4 is met when the included angle between the lower case hanging ring 3 and the horizontal plane of the lower case 4 in the vertical direction is 30-45 degrees.
Specifically, in the above embodiment, the mechanical analysis of the welding enclosure in the hoisting state includes determining a dangerous section of the hoisting ring, and calculating the area of the dangerous section; carrying out stress analysis on the lifting ring according to the area of the dangerous section to obtain the shear stress on the lifting ring; determining the yield strength of the welding enclosure according to the material of the welding enclosure; and comparing the obtained shear stress on the lifting ring and the yield strength of the welded shell, and determining that the lifting ring meets the yield strength requirement.
In this embodiment, referring to fig. 8, first, it is determined that a dangerous section of the shell lifting ring in the lifting process is a shearing surface between the lifting ring and a lifting appliance in the lifting process, and a shearing area S is equal to a thickness D of the lifting ring plate and a minimum distance D between the lifting ring and an outer wall; secondly, in the process of hoisting the welding machine shell, according to the requirement of the operation specification, the included angle between the steel wire rope for hoisting and the horizontal plane is not more than 90 degrees, and the upper shell 2 is subjected to stress analysis: g is 2Fcos (theta/2), wherein theta is an included angle between a lifted steel wire rope and a horizontal plane, F is the tensile force of the steel wire rope, so that the F/G is more than 0.5 and less than 0.71, and other factors such as a dynamic load coefficient and the like are considered, including the limit working conditions such as the loosening and failure of the lifting ring in the lifting process, so that the mechanical analysis and calculation of the lifting ring can be simplified into the calculation of the lifting ring under the extreme working conditions; then, the welding machine shell materials which are commonly used at present are Q345R and 09MnNIDR, when the welding machine shell adopts a Q345R steel plate, according to the national standard of GB/T713-2014 Steel plate for boiler and pressure vessel, when the thickness of the machine shell is not more than 100mm, the yield strength is not less than 305 MPa; when a 09MnNIDR steel plate is selected for a welded shell, according to the national standard of GB/T3531-; finally, because rings are closed structure in the atress process, so only need consider in the atress analysis rings the shear stress that receives can, according to the computational formula, rings the shear stress that receives tau be F/A, wherein, A is rings thick D the rings hole edge apart from the minimum distance D of outer wall for a, and material anti-shear performance evaluation index adopts 0.3 times yield strength value, tau be material yield strength 0.3 promptly, have again: where M is the weight of the housing in tons (t), G is the acceleration of gravity 9.8, and D, d is in millimeters (mm), it follows that, under the limit conditions: d D is M80.3, and in conclusion, when D is more than or equal to M80.3, the lifting ring can meet the requirement on yield strength, the weight M of the welding machine shell is divided into 4 grades which are respectively four grades above 0-10 (t), 10(t) -25 (t), 25(t) -55 (t) and 55(t) in consideration of the standardized design of the welding machine shell, the product of D and D can be obtained through formula conversion, and the numerical values of D and D are determined according to the actual structure and the size of the lifting ring.
Specifically, in the above embodiment, the size parameter table of the suspension ring further includes the weight of the upper case 2 of the welded case, and the vertical distance between the edge of the suspension ring corresponding to the weight of the upper case 2 and the edge of the upper case 2.
In the present embodiment, referring to fig. 2 to 4, among the dimensional parameters that need to be confirmed for the upper case lifting ring 1, first, the positioning angle α of the upper case lifting ring 1 is already determined to be 30 ° to 35 °; secondly, in order to meet the subsequent processing requirement, the edge of the lifting ring plate is not higher than the edge of the upper shell 2, and the vertical distance a between the edge of the upper shell lifting ring 1 and the edge of the upper shell 2 is more than or equal to 10mm, preferably 10 mm-50 mm; then, calculating the ultimate shear stress F of a single lifting ring according to the weight of the casing, selecting a proper shackle matched with the lifting ring by referring to the national standard GB/T25854-2010 commonly used D-shaped and bow-shaped forging shackle, and determining the diameter phi of the upper casing lifting ring 1 according to the diameter size of a shackle body; finally, in order to ensure the rotation of the lifting ring shackle, a lifting ring fillet R is regulated according to the structure and the size of the lifting ring.
In the size parameters needing to be confirmed by the lower shell lifting ring 3, the method is the same as the method for determining the upper shell lifting ring 1, the limit shearing stress F of a single lifting ring is calculated according to the weight of the lower shell 4, a proper shackle is selected according to the national standard GB/T25854 plus 2010' general D-shaped and bow-shaped forging shackle for lifting, and the diameter phi of the lower shell lifting ring 3 is determined according to the diameter size of a shackle body; secondly, guarantee the rotation of lower casing rings 3 shackle, prescribe rings fillet R according to the structure and the size of rings.
Specifically, in the above embodiment, the connecting the suspension ring to the welded case includes forming suspension ring holes in the plurality of suspension ring plates according to the size parameter table of the suspension ring, and respectively welding the plurality of suspension ring plates to the upper case 2 of the welded case according to the positioning angle of the suspension ring to form a plurality of upper case suspension rings 1; and (4) perforating rib plates of the lower shell 4 of the welding shell according to the size parameter table of the hanging rings and the positioning angle of the hanging rings to form a plurality of lower shell hanging rings 3. In the embodiment, holes can be directly formed by using rib plates at two axial ends of the upper shell 2 according to the arrangement of the upper shell hanging ring 1 at two ends of the upper shell 2; according to the arrangement of the lower shell lifting ring 3 at the middle position of the lower shell 4, a hole can be formed by directly utilizing a rib plate at the middle position of the lower shell 4; the rib plates on the welding machine shell are directly utilized for punching to manufacture the hanging ring, the structure is stable, and the operation is convenient.
Specifically, in the above embodiment, according to the size parameter table of the hanging ring and the positioning angle of the hanging ring, a hole is formed in a rib plate of the upper shell 2 of the welding shell to form a plurality of upper shell hanging rings 1; and (4) perforating rib plates of the lower shell 4 of the welding shell according to the size parameter table of the hanging rings and the positioning angle of the hanging rings to form a plurality of lower shell hanging rings 3. In this embodiment, the suspension ring plates may be perforated, and then the perforated suspension ring plates are symmetrically welded to the two axial ends of the upper housing 2, so that the upper housing 2 is also ensured not to be plastically deformed when being lifted.
Further, referring to fig. 5 and 6, the connection of the lifting ring to the welding enclosure further includes a plurality of upper enclosure lifting rings 1 distributed at two axial ends of the upper enclosure 2, and symmetrically arranged at two sides of the upper enclosure 2; the plurality of lower shell hanging rings 3 are symmetrically arranged on the rib plates at two sides of the lower shell 4. In the embodiment, at least four upper casing lifting rings 1 are uniformly distributed at two axial ends of an upper casing 2, and are symmetrically arranged at two sides of the upper casing 2; at least two lower casing rings 3 are arranged on two sides of the axial middle position of the lower casing 4, and the ring hole is arranged according to different use requirements of the upper casing 2 and the lower casing 4, so that the design structure is more reasonable, and waste is avoided.
Further, the method for assembling the hanging ring of the centrifugal compressor welded shell further comprises the following steps: designing the hoisting rings of various shells for centrifugal compressors with different structures according to the size parameter table of the hoisting rings; and (4) testing the lifting rings of various shells, and verifying the safety and the reasonability of the lifting ring assembling method. In the embodiment, the lifting rings are designed for centrifugal compressors with different structures according to the lifting ring parameter tables of the upper shell 2 and the lower shell 4 with different weight ranges, the serialization and standardization of the whole process of the lifting, overturning and placing of the centrifugal compressor shell are realized, the designed lifting ring product is tested and verified, the safety and the stability of various shells can be guaranteed in the lifting process, and the accident probability is reduced.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for assembling a lifting ring of a centrifugal compressor welded shell is characterized by comprising the following steps:
determining the placement position of a lifting ring on a welding machine shell according to the structure of the welding machine shell, and determining the positioning angle of the lifting ring on the welding machine shell;
according to the positioning angle of the hanging ring, mechanical analysis is carried out on the welded shell in a hoisting state, and a size parameter table of the hanging ring is output; the size parameter table of the hanging ring comprises the weight of the welding shell, the diameter of the hanging ring corresponding to the weight of the welding shell, the fillet radius of the hanging ring, the thickness of the hanging ring and the minimum distance between the hanging ring and the outer wall of the welding shell;
and connecting the hanging ring on the welding shell according to the positioning angle of the hanging ring and the size parameter table of the hanging ring, and finishing the assembly of the hanging ring on the welding shell.
2. The method for assembling the hanging ring of the welded shell of the centrifugal compressor according to claim 1, wherein the welded shell comprises an upper shell and a lower shell, the hanging ring comprises an upper shell hanging ring and a lower shell hanging ring, and the placement position of the hanging ring on the welded shell comprises the following steps:
the upper shell lifting rings are positioned at two ends of the upper shell;
the lower shell lifting ring is positioned in the middle of the lower shell.
3. The method of claim 2, wherein the placing of the slings on the welded casing further comprises:
the edge of the upper shell hanging ring is not higher than the edge of the upper shell.
4. The method for assembling the hanging ring of the welded shell of the centrifugal compressor according to claim 3, wherein the positioning angle of the hanging ring on the welded shell comprises:
an included angle between the upper shell lifting ring and the horizontal plane of the upper shell is 30-35 degrees;
the included angle of the lower shell lifting ring and the vertical direction of the horizontal plane of the lower shell is 30-45 degrees.
5. The method for assembling the hanging ring of the welded shell of the centrifugal compressor according to claim 1, wherein the mechanical analysis of the welded shell in a hoisting state comprises:
determining a dangerous section of the lifting ring, and calculating the area of the dangerous section;
carrying out stress analysis on the lifting ring according to the area of the dangerous section to obtain the shear stress on the lifting ring;
determining the yield strength of the welding enclosure according to the material of the welding enclosure;
and comparing the obtained shear stress on the lifting ring and the yield strength of the welding shell, and determining that the lifting ring meets the yield strength requirement.
6. The method of claim 1, wherein the table of dimensional parameters of the bail further comprises:
the welding machine shell comprises an upper shell weight of the welding machine shell and a vertical distance between the edge of the hanging ring corresponding to the upper shell weight and the edge of the upper shell.
7. The method of claim 1, wherein the attaching the bail to the welded casing comprises:
arranging lifting ring holes on a plurality of lifting ring plates according to the size parameter table of the lifting ring, and respectively welding the plurality of lifting ring plates to an upper shell of the welded shell according to the positioning angle of the lifting ring to form a plurality of upper shell lifting rings;
and according to the size parameter table of the hanging rings and the positioning angle of the hanging rings, perforating the lower shell rib plates of the welded shell to form a plurality of lower shell hanging rings.
8. The method of claim 1, wherein the attaching the bail to the welded casing comprises:
according to the size parameter table of the hanging rings and the positioning angles of the hanging rings, holes are formed in an upper shell rib plate of the welded shell to form a plurality of upper shell hanging rings;
and according to the size parameter table of the hanging rings and the positioning angle of the hanging rings, perforating the lower shell rib plates of the welded shell to form a plurality of lower shell hanging rings.
9. The method for assembling a lifting ring of a welded shell of a centrifugal compressor according to any one of claims 7 to 8, wherein the attaching the lifting ring to the welded shell further comprises:
the upper shell lifting rings are distributed at two axial ends of the upper shell and symmetrically arranged at two sides of the upper shell;
and the lower shell lifting rings are symmetrically arranged on the rib plates at two sides of the lower shell.
10. The method for assembling a lifting ring of a welded shell of a centrifugal compressor according to claim 1, further comprising:
designing the hoisting rings of various shells for centrifugal compressors with different structures according to the size parameter table of the hoisting rings;
and testing the lifting rings of the various shells to verify the safety and the reasonability of the lifting ring assembling method.
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