CN111502962A - Stress relief structure and design method for multi-stage compressor unit integrated design - Google Patents
Stress relief structure and design method for multi-stage compressor unit integrated design Download PDFInfo
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- CN111502962A CN111502962A CN202010381526.4A CN202010381526A CN111502962A CN 111502962 A CN111502962 A CN 111502962A CN 202010381526 A CN202010381526 A CN 202010381526A CN 111502962 A CN111502962 A CN 111502962A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 abstract description 16
- 230000010354 integration Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/123—Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
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Abstract
The invention discloses a stress relief structure and a design method for multi-stage compressor unit integrated design, and relates to the technical field of multi-stage compressor unit integrated design; the spring combination structure comprises a plurality of spring hangers arranged on a support lug of the interstage equipment, a first lifting lug is arranged on the spring mounting support, a second lifting lug is arranged on the support lug of the interstage equipment, so that the interstage equipment is arranged at a position close to the position just below a corresponding compressor pipe orifice, and the interstage equipment is lifted by the spring hangers; by implementing the technical scheme, the technical problem that the pipeline centralized arrangement difficulty of the existing integrated design equipment is high can be solved; the displacement deformation of each pipeline is absorbed and coordinated by adopting a spring combined structure, so that the stress and the load of the pipeline do not exceed allowable values, the aim of reducing the length of the pipeline and the number of elbows to the maximum extent is fulfilled, the optimized integrated design of a compressor unit is realized, the normal operation of the compressor is ensured, and the working efficiency of the compressor is greatly improved.
Description
Technical Field
The invention relates to the technical field of multi-stage compressor unit integrated design, in particular to a stress relief structure and a design method of multi-stage compressor unit integrated design.
Background
In the technical field of petrochemical industry, a compressor is generally an energy consumption household, a multi-stage compressor is the most common form in a large-scale compressor, and a multi-stage compressor unit is widely applied to petrochemical equipment and compresses a medium to enable the medium to reach the required pressure. And multistage compressor unit is because the interstage equipment, the pipeline is more, traditional multistage compressor unit equipment pipeline arrangement mode is complicated, its unit equipment adopts the rigidity to support, be connected with the compressor mouth of pipe by the one end of pipeline, the other end is connected with unit equipment, every pipeline both ends of so unit are fixed completely, this just requires that the pipeline will have sufficient length and the elbow of more quantity in all directions just can satisfy the stress and the equipment mouth of pipe atress requirement of pipeline, and then make unit equipment arrange in the position of keeping away from the compressor, and then lead to the unit to arrange the space very big, and material quantity such as pipeline and elbow is also very big, the energy consumption of compressor also can increase simultaneously, compressor unit efficiency is extremely low.
In view of the above technical problems, an integrated design is performed on inter-stage equipment, pipelines and other units of a multi-stage compressor unit, so as to reduce the length of the pipelines and the number of elbows to the maximum extent, and arrange the units in the minimum space range, thereby improving the efficiency of the compressor, and thus the technical problem that needs to be solved by the technical staff in the field is urgently needed.
Disclosure of Invention
In order to solve the technical problem of high difficulty in centralized arrangement of pipelines of the existing integrated design equipment, the invention aims to provide a stress relief structure for integrated design of a multistage compressor unit and a design method thereof, which aims to absorb and coordinate displacement deformation of each pipeline by using a spring combination structure, not only can effectively bear the weight of interstage equipment and pipelines, but also can enable the interstage equipment and the pipelines to form a whole body and solve the pipeline stress by adopting a natural compensation mode, so that the pipeline stress and load do not exceed allowable values, the purpose of designing by reducing the length of the pipelines and the number of elbows to the maximum extent is achieved, the optimized integrated design of the compressor unit is realized, the normal operation of the compressor is ensured, and the working efficiency of the compressor can be effectively and greatly improved.
The technical scheme adopted by the invention is as follows:
the stress relief structure comprises a spring combination structure and a spring mounting support for mounting the spring combination structure, wherein the spring combination structure comprises a plurality of spring hangers arranged on an interstage equipment support lug, first lifting lugs are arranged on the spring mounting support, second lifting lugs are arranged on the interstage equipment support lug, one end of each spring hanger is hinged to the first lifting lug, the other end of each spring hanger is hinged to the second lifting lug, so that interstage equipment is arranged at a position close to the position just below the corresponding compressor pipe orifice, and the spring hangers are used for supporting and lifting the interstage equipment.
The inventor of the application analyzes that the integrated design of the multistage compressor unit is to intensively arrange the pipelines of the equipment, because the interstage equipment adopts rigid support, the trend of the pipelines is simple and has no natural compensation capability, overlarge pipeline stress and thrust of the pipelines to the pipe orifice of the compressor can be generated, so that the key of the integrated design of the compressor unit is to control the pipeline stress and the stress of the pipe orifice of the equipment, and the integrated design difficulty of the multistage compressor is that the pipeline stress and the load of the pipe orifice of the compressor are difficult to reduce, so that the allowable value is easily exceeded, and the compressor cannot run; the technical scheme adopts a spring combination structure to replace the rigid support of each interstage device so as to form a whole between the interstage device and a pipeline and solve the pipeline stress by adopting a natural compensation mode, the thermal expansion deformation of each pipeline is absorbed and coordinated by the spring combination structure, so that the pipeline stress and the pipe orifice load do not exceed allowable values, the aim of designing the length of the pipeline and the number of elbows is further fulfilled to the maximum extent, the compressor and the interstage devices can be reasonably arranged, the pipelines in simple trend are used for connecting the inlet and the outlet of the compressor and the pipe orifices of the intermediate devices in each stage, the optimized integration design of the compressor unit is realized, the normal operation of the compressor is ensured, the working efficiency of the compressor is improved to the maximum extent, the design structure is simple, ingenious and reasonable, and the key difficulty of the integration design of the multistage compressor unit can be effectively solved, and simultaneously, the obvious and effective engineering practice effect is obtained.
Optionally, the first lifting lug is welded on the spring mounting bracket, the second lifting lug is welded on a support lug of the interstage device, the support lug extends horizontally outwards from the side wall of the interstage device along the diameter direction of the interstage device, and a pair of support lugs are oppositely arranged at two ends of the interstage device. Therefore, the spring hanger can bear the weight of the interstage equipment and the pipeline, downward displacement of the interstage equipment and the pipeline is not limited, two ends of the spring hanger are hinged with the first lifting lug and the second lifting lug, axial displacement of the interstage equipment along the interstage equipment is not limited, the interstage equipment and the connecting pipeline are considered together as a whole, and the problem of pipeline stress is solved by adopting a natural compensation mode.
Optionally, the lower end of the first lifting lug is provided with a lifting lug hole, so that the upper end of the spring hanger is hinged on the first lifting lug through the corresponding lifting lug hole by a bolt bearing pin; and the upper end of the second lifting lug is provided with a lifting lug hole, so that the lower end of the spring lifting bracket passes through the corresponding lifting lug hole through a bolt bearing pin and is hinged on the second lifting lug. Utilize bolt bearing pin to make spring hanger and the first lug and the second lug at its both ends form hinge structure, adopt the ingenious design of current structure, can not consume extra material design cost to can effectively utilize spring integrated configuration to absorb and coordinate each pipeline displacement deformation, have better practicality.
As a preferable scheme of the spring hanger, the spring hanger comprises a spring body and a hanging rod connected to the lower end of the spring body, the upper end of the spring body is hinged to the first lifting lug, and the lower end of the hanging rod is hinged to the second lifting lug.
Optionally, the first lifting lug is a single-plate lifting lug, and the second lifting lug is a double-plate lifting lug.
As another preferable scheme of the spring hanger, the spring hanger comprises a spring body and a hanger rod connected to the upper end of the spring body, the lower end of the spring body is hinged to the second lifting lug, and the upper end of the hanger rod is hinged to the first lifting lug.
Optionally, the first lifting lug is a double-plate lifting lug, and the second lifting lug is a single-plate lifting lug.
Optionally, the bolt bearing pin is installed horizontally along a radial plane of the interstage device. Therefore, the interstage equipment can be ensured to move along the axial direction of the interstage equipment in a limited installation space, the vertical displacement of the interstage equipment is not limited, the unit arrangement space is saved, and the optimized compressor unit integration design is facilitated.
In another aspect, the present invention further provides a stress relief design method for an integrated design of a multi-stage compressor assembly, applying the stress relief structure of any one of claims 1 to 8, the stress relief design method comprising the steps of:
s1, determining the position of the compressor, including the plane position and the installation height of the compressor;
s2, determining the position of the interstage equipment, so that the interstage equipment is arranged at a position close to and near the position right below the corresponding compressor nozzle;
s3, determining the trend of the connecting pipeline according to the interstage equipment pipe orifice and the corresponding compressor pipe orifice, wherein the pipeline trend is as simple as possible;
s4, using the spring combination structure to suspend the support lugs at two ends of the interstage equipment on the spring mounting bracket, and arranging and determining the position and the basic form of the spring combination structure;
s5, performing overall stress analysis on each interstage device and the pipeline correspondingly connected with the pipe orifice of the compressor, wherein the pipe orifice of the compressor is used as a fixed end of the pipeline, and the overall stress analysis comprises analyzing and calculating the pipeline stress, the stress of the pipe orifice of the compressor and the spring data in the spring combined structure;
and S6, modifying and adjusting the position of the compressor, the position of the interstage equipment or the mounting position of the upper part of the spring combination structure according to the overall stress analysis result in the step S5, so that the pipeline stress and the stress of the nozzle of the compressor meet allowable values.
Preferably, the spring combination structure comprises at least two spring hangers respectively and correspondingly arranged on support lugs close to two ends of the interstage equipment; modifying the position of the adjusting interstage device in step S6 adopts modifying the position of the lug of the adjusting interstage device.
As described above, the present invention has at least the following advantages over the prior art:
1. the stress relieving structure of the invention adopts the spring combination structure to replace the rigid support of each stage of equipment, so that the thermal expansion deformation of each pipeline is absorbed and coordinated by the spring combination structure, further the pipeline stress and the pipe orifice load do not exceed allowable values, the aim of designing the length of the pipeline and the number of elbows is achieved to the maximum extent, the compressor and the equipment among stages can be reasonably arranged, and the pipeline in a simple trend is used for connecting the inlet and the outlet of the compressor and the pipe orifice of the equipment among the stages, thereby realizing the optimized integrated design of the compressor unit.
2. The spring combination structure can effectively bear the weight of the interstage equipment and the pipeline, and does not limit the downward displacement of the interstage equipment and the pipeline, the two ends of the spring hanger are hinged with the first lifting lug and the second lifting lug, and the axial displacement of the interstage equipment along the spring hanger is not limited, so that the interstage equipment and the connecting pipeline are considered as a whole, the problem of pipeline stress is solved by adopting a natural compensation mode, and the technical problems of pipeline stress and the load of a compressor pipe orifice are further solved; the method is simple and easy to realize, and can save a large amount of engineering cost.
3. The spring combination structure fully considers the coordination of temperature difference deformation of the pipeline and the load of the pipe orifice of the compressor; after the integral stress analysis is carried out on the interstage equipment and the pipeline, the data (including installation load, spring stiffness and displacement) of each spring is calculated, so that the pipe orifice of the compressor meets the stress requirement, the spring combined structure is suitable for the application scene, and a remarkable and effective engineering practice effect is obtained.
4. The stress relieving structure design method breaks through the conventional thinking mode of solving the technical problem that the integrated design makes the centralized arrangement of the equipment pipelines difficult by increasing the length of a large number of pipelines and reducing the stress of the pipelines, but fully considers the arrangement of the units in the minimum space range and deals with the stress of the control pipelines and the stress of the pipe orifices of the equipment in a simple and effective natural compensation mode, thereby ensuring the simple trend of the pipelines, simultaneously realizing the optimized integrated design of the compressor units, ensuring the normal operation of the compressor and improving the working efficiency of the compressor to the maximum extent.
Drawings
The invention will be described by way of specific embodiments and with reference to the accompanying drawings, in which
FIG. 1 is a layout diagram of a stress relief structure of an exemplary embodiment multi-stage compressor rack integration design of the present invention;
fig. 2 is a schematic structural diagram of the stress relief structure of fig. 1 in an exemplary embodiment of the invention.
Description of reference numerals: 1-a first compressor pipe orifice; 2-a second compressor pipe orifice; 3-pipeline one; 4-pipeline two; 5-a spring hanger I; 6-spring hanger II; 7-spring hanger III; 8-spring hanger four; 9-interstage equipment (coolers); 10-a spring body; 11-a boom; 12-a first lifting lug; 13-a second lifting lug; 14-bolt bearing pin one; 15-bolt bearing pin II; 16-a lug; 17-spring mounting bracket.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The embodiment is basically as shown in fig. 1 to 2: the embodiment provides a stress relief structure for integrated design of a multi-stage compressor unit, which is applied to integrated design of inter-stage equipment (coolers) 9, pipelines and other units of the multi-stage compressor unit; the spring assembling structure comprises a spring assembling structure and a spring mounting support 17 for mounting the spring assembling structure, and specifically, the spring assembling structure comprises a plurality of spring hangers arranged on support lugs 16 of interstage equipment, a pair of support lugs 16 are oppositely arranged at two ends of the interstage equipment, each support lug 16 is correspondingly provided with one spring hanger, and therefore the spring assembling structure is provided with four spring hangers, namely a first spring hanger 5, a second spring hanger 6, a third spring hanger 7 and a fourth spring hanger 8; in the embodiment, the spring combination structure formed by the spring hanging bracket is utilized, so that the weight of interstage equipment and pipelines can be borne, and the downward displacement of the interstage equipment and the pipelines is not limited; the spring mounting bracket 17 is provided with a first lifting lug 12, the interstage equipment support lug 16 is provided with a second lifting lug 13, the upper end of the spring hanger is hinged with the first lifting lug 12, the lower end of the spring hanger is hinged with the second lifting lug 13, so that the interstage equipment is arranged at a position close to the position right below the corresponding compressor nozzle, and the interstage equipment is lifted by using the four spring hangers.
In order to ensure the installation stability of the stress relief structure, in the embodiment, the first lifting lug 12 is welded on the spring installation bracket 17, the second lifting lug 13 is welded on the support lug 16 of the interstage equipment, the support lug 16 extends horizontally outwards from the side wall of the interstage equipment along the diameter direction of the interstage equipment, two ends of the spring hanger are hinged with the first lifting lug 12 and the second lifting lug 13, the axial displacement of the interstage equipment along the spring hanger is not limited, so that the interstage equipment and the connecting pipeline are considered together as a whole, and the problem of pipeline stress is solved by adopting a natural compensation mode.
As shown in fig. 2, the spring hanger of this embodiment includes a spring body 10 and a suspension rod 11 connected to a lower end of the spring body 10, an upper end of the spring body 10 is hinged to a first lifting lug 12, a lower end of the suspension rod 11 is hinged to a second lifting lug 13, specifically, the first lifting lug 12 is a single-plate lifting lug, the second lifting lug 13 is a double-plate lifting lug, and a lifting lug hole is formed at a lower end of the single-plate lifting lug, so that the upper end of the spring body 10 in the spring hanger is hinged to the single-plate lifting lug through a corresponding lifting lug hole by a bolt bearing pin, and specifically, is hinged to the single-plate lifting lug through a corresponding lifting lug; the upper end of the double-plate lifting lug is provided with a lifting lug hole, so that the lower end of a lifting rod 11 in the spring hanger passes through the corresponding lifting lug hole through a bolt bearing pin and is hinged on the double-plate lifting lug, specifically passes through the corresponding lifting lug hole through a bolt bearing pin II 15 and is hinged on the double-plate lifting lug, and the bolt bearing pin is horizontally arranged and installed along the radial plane of the interstage equipment. Utilize the bolt bearing round pin to make spring hanger and first lug 12 and the second lug 13 at its both ends form hinge structure in this embodiment, adopt current structure ingenious design, can not consume extra material design cost to can effectively utilize spring integrated configuration to absorb and coordinate each pipeline displacement and warp, have better practicality.
From the above, in the embodiment, the spring combination structure can effectively bear the weight of the interstage equipment and the pipeline, and does not limit the downward displacement of the interstage equipment and the pipeline, and the two ends of the spring hanger are hinged to the first lifting lug 12 and the second lifting lug 13, and do not limit the axial displacement of the interstage equipment along the spring hanger, so that the interstage equipment and the connecting pipeline are considered together as a whole, and the problem of pipeline stress is solved by adopting a natural compensation mode, and further the technical problems of pipeline stress and load of a compressor pipe orifice are solved; the method is simple and easy to realize, and can save a large amount of engineering cost; the design method of the stress relieving structure breaks through the conventional thinking mode of solving the technical problem that the difficulty of centralized arrangement of the equipment pipelines is high by improving the stress intensity of the pipelines in the conventional mode, but fully considers that the unit is arranged in the minimum space range, and deals with the stress of the control pipeline and the stress of the pipe orifice of the equipment in a simple and effective natural compensation mode, so that the optimized integrated design of the compressor unit is realized while the simple trend of the pipelines is ensured, the normal operation of the compressor is ensured, and the working efficiency of the compressor is improved to the maximum extent.
Example two
The second embodiment is substantially the same as the first embodiment, except that: the spring hanger in the spring combination structure provided by this embodiment has different corresponding positions of the spring body 10 and the suspension rod 11 (not shown), the spring hanger includes the spring body 10 and the suspension rod 11 connected to the upper end of the spring body 10, the lower end of the spring body 10 is hinged to the second lifting lug, and the upper end of the suspension rod 11 is hinged to the first lifting lug; correspondingly, the first lifting lug is a double-plate lifting lug, the second lifting lug is a single-plate lifting lug, and the lower end of the double-plate lifting lug is provided with a lifting lug hole, so that the upper end of a lifting rod 11 in the spring hanger is hinged on the double-plate lifting lug through a bolt bearing pin passing through the corresponding lifting lug hole; the upper end of the veneer lifting lug is provided with a lifting lug hole, so that the lower end of the spring body 10 in the spring hanger is hinged on the veneer lifting lug through the corresponding lifting lug hole by a bolt bearing pin, the bolt bearing pin is horizontally arranged and installed along the radial plane of the interstage equipment, so that the interstage equipment can be ensured to move along the axial direction in a limited installation space, the vertical direction displacement of the interstage equipment is not limited, the unit arrangement space is saved, and the optimized compressor unit integration design is convenient to realize.
EXAMPLE III
On the other hand, fig. 1 shows a schematic layout diagram of a stress relief structure of an integrated design of a multi-stage compressor unit according to an exemplary embodiment of the present invention, and according to the present invention, the present embodiment further provides a stress relief design method of an integrated design of a multi-stage compressor unit, which applies the stress relief structure according to the first embodiment, the stress relief design method includes the following steps:
s1, determining the position of the compressor, including the plane position and the installation height of the compressor;
s2, positioning the interstage device (cooler) 9 such that the interstage device is disposed in close proximity to and directly below the corresponding compressor nozzle;
s3, determining the trend of the connecting pipeline according to the interstage equipment pipe orifice and the corresponding compressor pipe orifice, wherein the pipeline trend is as simple as possible;
s4, using the spring combination structure to hang the support lugs 16 at the two ends of the interstage equipment (cooler) 9 on the spring mounting brackets 17, and arranging and determining the position and the basic form of the spring combination structure;
s5, performing overall stress analysis on each interstage device and a pipeline I3 correspondingly connected with a compressor pipe orifice I1 and a pipeline II 4 correspondingly connected with a compressor pipe orifice II 2, wherein the analysis takes the compressor pipe orifice I1 and the compressor pipe orifice II 2 as fixed ends of the pipelines, and the overall stress analysis comprises the steps of analyzing and calculating the pipeline stress, the stress of the compressor pipe orifice and the spring data in the spring combined structure;
and S6, modifying and adjusting the position of the compressor, the position of the interstage equipment or the mounting position of the upper part of the spring combination structure according to the overall stress analysis result in the step S5, so that the pipeline stress and the stress of the nozzle of the compressor meet allowable values.
The spring assembly structure in this embodiment includes two spring hangers respectively provided correspondingly on the lugs 16 near both ends of the inter-stage device (cooler) 9; in the design process, because the stress requirement of the compressor pipe orifice is very high, the design is usually required to be modified, and the pipeline stress analysis is carried out for multiple times to meet the requirement; the modification design includes adjusting the position of the intermediate device, modifying the pipeline orientation, etc., and as a preferred solution of this embodiment, the most effective and simplest method is to modify the position of the inter-stage device in step S6 to modify the position of the support lug of the inter-stage device.
It is worth noting that the equipment between each stage is provided with two water inlet and outlet pipelines connected with the underground water pipe, the diameters of the two pipelines are not large, but the influence on the equipment between stages is noticed, so that the normal function of the spring combination structure is not influenced, and meanwhile, the equipment between stages can be well stabilized in the horizontal direction.
The stress analysis result of the whole stress analysis result of the multistage compressor unit integrated design applied to the stress relief structure of the embodiment is compared with the stress analysis result of the prior art:
the first comparison scheme is as follows: the stress relieving structure in the first embodiment is completely adopted, namely, a first spring hanger 5, a second spring hanger 6, a third spring hanger 7 and a fourth spring hanger 8 are arranged on support lugs at two ends of the interstage equipment shown in fig. 1, and the data of the overall stress analysis result after installation is shown in table 1, so that the requirements of engineering specifications are completely met.
TABLE 1 analysis results of the stress and moment of the compressor nozzle completely adopting the stress relieving structure of the embodiment
Comparative scheme two: the stress relieving structure in the first embodiment is partially adopted, namely a first spring hanger and a second spring hanger are arranged on a support lug at one end of the interstage equipment shown in figure 1, a third spring hanger and a fourth spring hanger are not arranged on a support lug at the other end of the interstage equipment, the overall stress analysis result data after the installation is shown in a table 2, and the numerical values of the operation conditions in the following table are extremely large and cannot meet the requirements of engineering specifications.
Table 2 analysis results of stress and moment of the compressor nozzle using the stress relieving structure of the embodiment
A third comparison scheme: the stress relief structure in the first embodiment is not adopted at all, namely, the support lugs at two ends of the interstage equipment shown in fig. 1 are supported by rigid structures, the integral stress analysis result data after the interstage equipment is installed is shown in table 3, and the numerical value of the operation working condition in the following table is extremely large and does not meet the requirements of engineering specifications.
TABLE 3 analysis results of the stress and moment of the compressor nozzle without the stress relieving structure of the embodiment
By comparison, it can be seen that: analysis technical results of the three schemes show that the energy-saving and efficiency-increasing integrated design of the compressor unit can be realized by completely adopting the stress relief structure in the first embodiment, and the energy-saving and efficiency-increasing integrated design of the compressor unit cannot be realized by the other two schemes.
In summary, the stress relieving structure of the present embodiment adopts the spring combination structure to replace the rigid support of each interstage device, so that the thermal expansion deformation of each pipeline is absorbed and coordinated by the spring combination structure, and further the pipeline stress and the pipe orifice load do not exceed allowable values, so as to achieve the purpose of designing to reduce the pipeline length and the number of elbows to the maximum extent, wherein the spring combination structure fully considers the coordination of the pipeline temperature difference deformation and the pipe orifice load of the compressor; after integral stress analysis is carried out on the interstage equipment and the pipeline, data (including installation load, spring stiffness and displacement) of each spring is calculated, so that the pipe orifice of the compressor meets the stress requirement, the spring combined structure is suitable for the application scene, and a remarkable and effective engineering practice effect is obtained; the data of the overall stress analysis result shows that the integrated design of a compressor unit can be well realized, the compressor and equipment among all levels can be reasonably arranged, and the inlet and the outlet of the compressor and the pipe orifice of the equipment among all levels can be connected by a pipeline with a simple trend, so that a large amount of pipeline materials and arrangement space can be reduced, the efficiency of the compressor can be greatly improved, and the compressor has good application prospect and popularization and use value, and is suitable for popularization and application.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. Stress relief structure of multistage compressor unit integrated design, its characterized in that: the spring mounting support is used for mounting the spring combination structure, the spring combination structure comprises a plurality of spring hangers arranged on an interstage equipment support lug, a first lifting lug is arranged on the spring mounting support, a second lifting lug is arranged on the interstage equipment support lug, one end of each spring hanger is hinged to the first lifting lug, the other end of each spring hanger is hinged to the second lifting lug, so that the interstage equipment is arranged at a position close to and near the position right below a corresponding compressor pipe orifice, and the spring hangers are used for supporting and lifting the interstage equipment.
2. The multi-stage compressor assembly designed stress relief structure of claim 1, wherein: the first lifting lug is welded on the spring mounting bracket, the second lifting lug is welded on a support lug of the interstage equipment, the support lug extends horizontally outwards from the side wall of the interstage equipment along the diameter direction of the interstage equipment, and a pair of support lugs are oppositely arranged at two ends of the interstage equipment.
3. The multi-stage compressor assembly designed stress relief structure of claim 1, wherein: the lower end of the first lifting lug is provided with a lifting lug hole, so that the upper end of the spring hanging bracket is hinged on the first lifting lug through a bolt bearing pin passing through the corresponding lifting lug hole; and the upper end of the second lifting lug is provided with a lifting lug hole, so that the lower end of the spring lifting bracket passes through the corresponding lifting lug hole through a bolt bearing pin and is hinged on the second lifting lug.
4. The multi-stage compressor assembly designed stress relief structure of claim 3, wherein: the spring hanger comprises a spring body and a hanging rod connected to the lower end of the spring body, the upper end of the spring body is hinged to the first lifting lug, and the lower end of the hanging rod is hinged to the second lifting lug.
5. The multi-stage compressor assembly designed stress relief structure of claim 4, wherein: the first lifting lug is a single-plate lifting lug, and the second lifting lug is a double-plate lifting lug.
6. The multi-stage compressor assembly designed stress relief structure of claim 3, wherein: the spring hanger comprises a spring body and a hanging rod connected to the upper end of the spring body, the lower end of the spring body is hinged to the second lifting lug, and the upper end of the hanging rod is hinged to the first lifting lug.
7. The multi-stage compressor assembly designed stress relief structure of claim 6, wherein: the first lifting lug is a double-plate lifting lug, and the second lifting lug is a single-plate lifting lug.
8. The multi-stage compressor assembly designed stress relief structure of claim 3, wherein: the bolt bearing pin is horizontally arranged and installed along the radial plane of the interstage equipment.
9. The stress relief design method for the integrated design of the multistage compressor unit is characterized by comprising the following steps of: applying the stress relief structure of any of claims 1 to 8, said stress relief design method comprising the steps of:
s1, determining the position of the compressor, including the plane position and the installation height of the compressor;
s2, determining the position of the interstage equipment, so that the interstage equipment is arranged at a position close to and near the position right below the corresponding compressor nozzle;
s3, determining the direction of the connecting pipeline according to the interstage equipment pipe orifice and the corresponding compressor pipe orifice;
s4, using a spring combination structure to suspend the support lugs at two ends of the interstage equipment on a spring mounting bracket;
s5, performing overall stress analysis on each interstage device and the pipeline correspondingly connected with the pipe orifice of the compressor, wherein the pipe orifice of the compressor is used as a fixed end of the pipeline, and the overall stress analysis comprises analyzing and calculating the pipeline stress, the stress of the pipe orifice of the compressor and the spring data in the spring combined structure;
and S6, modifying and adjusting the position of the compressor, the position of the interstage equipment or the mounting position of the upper part of the spring combination structure according to the overall stress analysis result in the step S5, so that the pipeline stress and the stress of the nozzle of the compressor meet allowable values.
10. The method for designing stress relief for an integrated design of a multistage compressor assembly according to claim 9, wherein: the spring combination structure comprises at least two spring hangers which are respectively and correspondingly arranged on support lugs close to two ends of the interstage equipment; modifying the position of the adjusting interstage device in step S6 adopts modifying the position of the lug of the adjusting interstage device.
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