CN115450931A - Novel multi-stage centrifugal pump rotor calibration device and method - Google Patents
Novel multi-stage centrifugal pump rotor calibration device and method Download PDFInfo
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- CN115450931A CN115450931A CN202211229108.9A CN202211229108A CN115450931A CN 115450931 A CN115450931 A CN 115450931A CN 202211229108 A CN202211229108 A CN 202211229108A CN 115450931 A CN115450931 A CN 115450931A
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- casing
- impeller
- centrifugal pump
- choma
- support frame
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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Abstract
The invention provides a novel multi-stage centrifugal pump rotor calibration device and a novel multi-stage centrifugal pump rotor calibration method, wherein the novel multi-stage centrifugal pump rotor calibration device comprises a shell support frame and a dynamic balancing machine, wherein the shell support frame is fixedly arranged on a machine base of the dynamic balancing machine; the multistage centrifugal pump core package includes casing, casing choma and rotor subassembly under the core package, the casing install in under the core package casing support frame, casing choma fixed mounting in the core package is internal, the rotor subassembly install in the casing choma, the hub connection of rotor subassembly extremely the dynamic balancing machine, epaxial multistage impeller that is provided with, impeller mounting has the impeller choma, and each grade the impeller is all installed in correspondingly in the casing choma, each grade on the impeller choma is with corresponding clearance between the casing choma is 0.20-0.25mm. The technical scheme of the invention solves the problems that the conventional dynamic balance checking method can cause damage to the rotor part in the assembling and disassembling process, the service life of the multistage centrifugal pump is influenced, and the dynamic balance checking precision is low.
Description
Technical Field
The invention relates to the technical field of centrifugal pump rotor calibration, in particular to a novel multi-stage centrifugal pump rotor calibration device and method.
Background
The feeding pumps of the refining and hydrogenation device are high-temperature and high-pressure multistage BB5 centrifugal pumps, are also the most central key pumps in the device process, and play an important role in long-period operation of the device. Along with pump cycle length vulnerable part wear efficiency reduces and need overhaul, and the key step of overhauing is the dynamic balance check-up of rotor, because core package casing choma is overall structure overlaps respectively on every grade of impeller of rotor, and conventional dynamic balance check-up need take out casing choma after dismantling every grade of impeller, and every grade of impeller of repacking accomplishes the rotor dynamic balance check-up, and the rotor part can have following problem at the dismouting in-process:
(1) Because the impeller and the shaft are in interference fit, the impeller is uniformly heated to 320 ℃ by adopting a baking handle when the impeller is disassembled and assembled, the impeller is disassembled after expansion difference is generated between the impeller and the shaft, and the strength of the impeller is reduced and the service life of the impeller is shortened because micro plastic deformation is generated in the repeated heating process of the impeller and the grain size of the material of the impeller is gradually thickened;
(2) After the dynamic balance of the rotor is qualified, the impeller needs to be disassembled again to reassemble the shell opening ring and the impeller, and at the moment, whether the dynamic balance precision is influenced in the assembling process cannot be verified after the impeller is reassembled;
the conventional dynamic balance checking method can cause damage to the rotor part in the dismounting process, so that the service life of the multistage centrifugal pump is influenced, the dynamic balance checking precision is low, the maintenance period is long, the equipment integrity rate is reduced, and the safe and stable operation of the device is seriously influenced.
Disclosure of Invention
According to the technical problems of the conventional multi-stage centrifugal pump rotor dynamic balance checking mode, the novel multi-stage centrifugal pump rotor checking device and the method are provided.
The technical means adopted by the invention are as follows:
a novel multi-stage centrifugal pump rotor calibration device comprises a shell support frame and a dynamic balancing machine, wherein the shell support frame is fixedly installed on a machine base of the dynamic balancing machine; the multistage centrifugal pump core package includes casing, casing choma and rotor subassembly under the core package, the casing install in under the core package casing support frame, casing choma fixed mounting in the core package is internal, the rotor subassembly install in the casing choma, the hub connection of rotor subassembly extremely the dynamic balancing machine, epaxial multistage impeller that is provided with, impeller mounting has the impeller choma, and each grade the impeller is all installed in correspondingly in the casing choma, each grade on the impeller choma is with corresponding clearance between the casing choma is 0.20-0.25mm.
Further, the shell support frame comprises a support platform and an arc-shaped support frame fixedly installed on the support platform, the arc-shaped support frame comprises arc-shaped support plates at two ends and a connecting plate used for connecting the arc-shaped support plates, and the core cladding shell is installed on the arc-shaped support frame.
The novel multi-stage centrifugal pump rotor calibration method is adopted, and specifically comprises the following steps:
s1, fixedly mounting a shell support frame on a base of a dynamic balancing machine through bolts;
s2, taking down the upper core cladding shell of the core cladding of the multistage centrifugal pump, placing the lower core cladding shell on a shell support frame, and adjusting the lower core cladding shell to a required height and keeping the lower core cladding shell horizontal through a jackscrew arranged on the shell support frame;
s3, connecting a shaft in a rotor assembly of the multi-stage centrifugal pump core package to a dynamic balancing machine, fixedly mounting a shell opening ring provided with the rotor assembly on a core package lower shell, adjusting the rotor assembly to be coaxial with the shell opening ring, and adjusting the gap between an impeller opening ring on each stage of impeller and the corresponding shell opening ring to be 0.20-0.25mm;
and S4, performing dynamic balance test on the rotor assembly through a dynamic balancing machine, and finishing verification according to a test result.
Compared with the prior art, the invention has the following advantages:
the novel rotor calibration device and method of the multistage centrifugal pump can improve the rotor calibration precision, reduce the times of rotor impeller disassembly and assembly, prolong the service life of equipment, shorten the maintenance time, improve the equipment availability and ensure the safe and stable operation of the device; meanwhile, the technical level requirement of maintenance personnel for disassembling and assembling the rotor impeller pair is very high, so that the core package needs to be returned to a factory for maintenance in the conventional maintenance process, and the maintenance cost is high.
Based on the reasons, the invention can be widely popularized in the field of multistage centrifugal pumps.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a multistage centrifugal pump core package structure.
Fig. 2 is a schematic view of the structure of the housing supporting frame according to the present invention.
In the figure: 1. a multistage centrifugal pump; 2. a core bag lower shell; 3. a housing collar; 4. a rotor assembly; 41. an impeller; 42. a shaft; 5. a housing support frame; 51. a support platform; 52. an arc-shaped support frame; 521. an arc-shaped support plate; 522. a connecting plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1-2, the invention provides a novel rotor calibration device for a multistage centrifugal pump, which comprises a shell support frame 5 and a dynamic balancing machine, wherein the shell support frame 5 is fixedly installed on a machine base of the dynamic balancing machine; 1 core package of multistage centrifugal pump includes casing 2, casing choma 3 and rotor subassembly 4 under the core package, casing 2 install in casing support frame 5 under the core package, 3 fixed mounting of casing choma in casing 2 under the core package, rotor subassembly 4 install in the casing choma 3, the axle 42 of rotor subassembly 4 is connected to the dynamic balancing machine, be provided with multistage impeller 41 on the axle 42, impeller 41 installs impeller choma, and each level impeller 41 all installs in corresponding in the casing choma 3, each level impeller 41 is last impeller choma and corresponding clearance between the casing choma 3 is 0.20-0.25mm to when guaranteeing to carry out the dynamic balance test, the rotor subassembly can not take place to bump the mill in the rotation on the dynamic balancing machine, prevents the damage of impeller secondary, improves dynamic balance inspection precision.
Further, the shell supporting frame 5 includes a supporting platform 51 and an arc-shaped supporting frame 52 fixedly mounted on the supporting platform, the arc-shaped supporting frame 52 includes arc-shaped supporting plates 521 at two ends and a connecting plate 522 for connecting the arc-shaped supporting plates 521, and the core package lower shell is mounted on the arc-shaped supporting frame 52.
The novel multi-stage centrifugal pump rotor calibration method is adopted, and specifically comprises the following steps:
s1, fixedly mounting a shell support frame 5 on a base of a dynamic balancing machine through bolts;
s2, taking down an upper core bag shell of the core bag of the multistage centrifugal pump, placing the lower core bag shell 2 on a shell support frame 5, and adjusting the lower core bag shell 2 to a required height and keeping the height horizontal through a jackscrew arranged on the shell support frame 5;
s3, connecting a shaft 42 in a rotor assembly 4 of the core cladding of the multistage centrifugal pump to a dynamic balancing machine, fixedly mounting a shell opening ring 3 provided with the rotor assembly 4 on a core cladding lower shell 2, adjusting the rotor assembly to be coaxial with the shell opening ring 3 by adopting a dial indicator and a feeler gauge, and adjusting the gap between an impeller opening ring on each stage of impeller 41 and the corresponding shell opening ring 3 to be 0.20-0.25mm;
s4, performing a dynamic balance test on the rotor assembly 4 through a dynamic balancer, and finishing verification according to a test result;
specifically, the step S4 includes performing two dynamic balance tests when the dynamic balance machine is used for performing dynamic balance verification, comparing test results, and outputting a test result of a subsequent test when the test results of the two sides meet a preset threshold value to complete the verification.
By adopting the novel multi-stage centrifugal pump rotor calibration device and method provided by the invention, the casing mouth ring on the impeller does not need to be repeatedly disassembled and assembled, the rotor assembly is integrally moved, the gap between the impeller mouth ring and the casing mouth ring is adjusted, the accurate calibration of the dynamic balance of the rotor can be completed after the impeller is ensured not to be abraded, the operation is simple, the precision is accurate, the safety and the reliability are realized in the execution process, the operation time of not less than 20h can be saved compared with the conventional multi-stage rotor calibration method, and the maintenance efficiency is effectively improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The novel multi-stage centrifugal pump rotor calibration device is characterized by comprising a shell support frame and a dynamic balancing machine, wherein the shell support frame is fixedly arranged on a machine base of the dynamic balancing machine; the multistage centrifugal pump core package includes casing, casing choma and rotor subassembly under the core package, the casing install in under the core package casing support frame, casing choma fixed mounting in the core package is internal, the rotor subassembly install in the casing choma, the hub connection of rotor subassembly extremely the dynamic balancing machine, epaxial multistage impeller that is provided with, impeller mounting has the impeller choma, and each grade the impeller is all installed in correspondingly in the casing choma, each grade on the impeller choma is with corresponding clearance between the casing choma is 0.20-0.25mm.
2. The novel multistage centrifugal pump rotor calibration device of claim 1, wherein the casing support frame comprises a support platform and an arc-shaped support frame fixedly mounted on the support platform, the arc-shaped support frame comprises arc-shaped support plates at two ends and a connecting plate for connecting the arc-shaped support plates, and the core casing is mounted on the arc-shaped support frame.
3. A novel multi-stage centrifugal pump rotor calibration method is characterized in that the novel multi-stage centrifugal pump rotor calibration device of claim 1 is adopted, and the method specifically comprises the following steps:
s1, fixedly mounting a shell support frame on a base of a dynamic balancing machine through bolts;
s2, taking down the core cladding upper shell of the core cladding of the multistage centrifugal pump, placing the core cladding lower shell on a shell support frame, and adjusting the core cladding lower shell to a required height and keeping the core cladding lower shell horizontal through jackscrews arranged on the shell support frame;
s3, connecting a shaft in a rotor assembly of a multistage centrifugal pump core package to a dynamic balancing machine, fixedly installing a shell opening ring provided with the rotor assembly on a lower shell of the core package, adjusting the rotor assembly to be coaxial with the shell opening ring, and adjusting the gap between an impeller opening ring on each stage of impeller and the corresponding shell opening ring to be 0.20-0.25mm;
and S4, performing dynamic balance test on the rotor assembly through a dynamic balancing machine, and finishing verification according to a test result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229108.9A CN115450931A (en) | 2022-10-09 | 2022-10-09 | Novel multi-stage centrifugal pump rotor calibration device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229108.9A CN115450931A (en) | 2022-10-09 | 2022-10-09 | Novel multi-stage centrifugal pump rotor calibration device and method |
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| CN115450931A true CN115450931A (en) | 2022-12-09 |
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| CN202211229108.9A Pending CN115450931A (en) | 2022-10-09 | 2022-10-09 | Novel multi-stage centrifugal pump rotor calibration device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117399985A (en) * | 2023-12-15 | 2024-01-16 | 杭州新亚低温科技有限公司 | High-accuracy and high-efficiency assembling and debugging system for high-power high-lift cryogenic pump |
-
2022
- 2022-10-09 CN CN202211229108.9A patent/CN115450931A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117399985A (en) * | 2023-12-15 | 2024-01-16 | 杭州新亚低温科技有限公司 | High-accuracy and high-efficiency assembling and debugging system for high-power high-lift cryogenic pump |
| CN117399985B (en) * | 2023-12-15 | 2024-03-05 | 杭州新亚低温科技有限公司 | High-accuracy and high-efficiency assembling and debugging system for high-power high-lift cryogenic pump |
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