CN109655202B - Multistage centrifugal pump rotor assembly test support platform - Google Patents
Multistage centrifugal pump rotor assembly test support platform Download PDFInfo
- Publication number
- CN109655202B CN109655202B CN201910047949.XA CN201910047949A CN109655202B CN 109655202 B CN109655202 B CN 109655202B CN 201910047949 A CN201910047949 A CN 201910047949A CN 109655202 B CN109655202 B CN 109655202B
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- bottom plate
- bearings
- centrifugal pump
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- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 16
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
- G01M1/04—Adaptation of bearing support assemblies for receiving the body to be tested
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a multistage centrifugal pump rotor assembly test support table, which comprises an operation table, a bottom plate fixedly connected with the operation table, two groups of supports which are arranged on the upper side of the bottom plate and are oppositely arranged, a top frame arranged on the outer side of the supports, screw jackscrews arranged on the upper side of the top frame and two bearings arranged on the upper side of each group of supports, wherein the supports can move on the bottom plate, the top frame can move up and down relative to the supports, the screw jackscrews can rotate relative to the top frame and can move up and down relative to the top frame, the bearings are rotationally connected with the supports, the bearings can move horizontally relative to the supports, a notch for penetrating through a journal is formed in the upper side of each support, one side of the journal is clamped between the two bearings arranged on one group of supports, the other side of the journal is clamped between the two bearings arranged on the other group of supports, and one ends of the two screw jackscrews are respectively propped against one end face of the journal. The invention enhances the stability in the test process.
Description
Technical Field
The invention relates to the technical field of operation tables, in particular to a multistage centrifugal pump rotor assembly bearing test support table.
Background
The multistage centrifugal pump is an important power device in oilfield production, and the quality of operation aging directly influences the stable transportation of the oilfield. Multistage centrifugal pumps are generally divided into a stator portion and a rotor portion in a manner of relative movement. The main function of the stator part is to seal and collect pressure, the main function of the rotor part is to output pressure energy to the outside through centrifugal force generated by the rotation of the axis of the rotor part, and the stator part is an important component assembly of the multistage centrifugal pump and comprises a pump shaft, a bearing, an impeller, a balance disc, a shaft sleeve, a baffle sleeve, a water seal ring, a process sleeve and the like.
After the multistage centrifugal pump runs for a period of time, the balance of the rotor assembly in the multistage centrifugal pump is required to be tested, so that the pump efficiency and the safety of the pump during running are ensured, and the multistage centrifugal pump is an important detection means for maintaining the centrifugal pump and is an indispensable working link. The accuracy of the detection quality directly influences the operation effect after installation, but the accuracy in the test process depends on the working experience of detection personnel, the stability of detection equipment and the quality of auxiliary functions, so that the test auxiliary equipment directly influences the accuracy of measurement data. The test equipment applied at present is relatively simple and can not meet the requirement of accurate test data.
Disclosure of Invention
The invention aims to provide a multistage centrifugal pump rotor assembly test support table, which solves the problems in the prior art and enhances the stability in the test process.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a multistage centrifugal pump rotor assembly test support table, which comprises an operation table, a bottom plate fixedly connected with the operation table, two groups of supports which are arranged on the upper side of the bottom plate and are oppositely arranged, a top frame arranged on the outer side of the supports, a screw jackscrew arranged on the upper side of the top frame and two bearings arranged on the upper side of each group of supports, wherein the supports can move on the bottom plate, the top frame can move up and down relative to the supports, the screw jackscrew can rotate relative to the top frame and can move up and down relative to the top frame, the bearings are rotatably connected with the supports, the bearings can move horizontally relative to the supports, a notch for penetrating through a shaft neck is formed in the upper side of each support, one side of the shaft neck is clamped between the two bearings arranged on one group of the supports, the other side of the shaft neck is clamped between the two bearings arranged on the other group of supports, and one end face of each of the two screw jackscrews is respectively supported on one end face of the shaft neck.
Preferably, a fine adjustment slideway is respectively arranged at two sides of the notch, a screw rod frame is arranged in the fine adjustment slideway, the screw rod frame can horizontally move in the fine adjustment slideway, the bearing is sleeved on the screw rod frame, and two ends of the screw rod frame can be fixed on the bracket through fixing nuts.
Preferably, the bearings are in interference fit with the brackets, and the distance between two bearings on the same set of brackets matches the outer diameter of the journal.
Preferably, the roof-rack is "Z" type, the roof-rack is arranged in the middle part of support, the upside of roof-rack is equipped with a first regulation spout in the horizontal direction, the other end of screw rod jackscrew can be through first regulation spout reciprocates just can be in first regulation spout is interior left and right sides removes, the screw rod jackscrew can be fixed in through jackscrew nut on the roof-rack, the downside of roof-rack is equipped with a second regulation spout in the vertical direction, the roof-rack can be through the second regulation spout is in the support reciprocates, be equipped with a locking bolt in the second regulation spout, the roof-rack can be fixed in on the support through the locking bolt.
Preferably, a plurality of slide ways are arranged on the bottom plate, the support can move left and right on the bottom plate through the slide ways, a slide rod is arranged in the slide ways, and the slide rod can be fixedly connected with the bottom plate through nuts.
Preferably, the support includes the fixed plate and set up in the fixed plate upside, with fixed plate fixed connection just two steel sheets that set up side by side, same two on the support the bearing level set up in two between the steel sheet, the fixed plate can be in slide on the bottom plate.
Preferably, four vertical rods are uniformly distributed on the lower side of the bottom plate, the upper ends of the vertical rods can be adjusted in height through leveling nuts, and the lower ends of the vertical rods are fixed on the operating table.
Preferably, the steel plate has dimensions of 100mm×80mm×10mm, the base plate has dimensions of 150mm×80mm×10mm, and the console has dimensions of 1100mm×1200mm×50mm.
Preferably, the notch is "V" shaped.
Compared with the prior art, the invention has the following technical effects:
1. the vertical support is connected with the bottom plate with the slide way, so that the rotor assembly can be stably supported, and the stability in the testing process is enhanced.
2. The two sides of the pump shaft are propped by adopting the Z-shaped top frame design, so that the phenomenon that the pump shaft moves in the transverse direction during testing is avoided, the non-offset of a measuring point during the rotation of the pump shaft is ensured, the accuracy of measured data is further ensured, the detection precision is improved, data support is provided for the next step of repairing machine parts, unnecessary processing procedures and calibration procedures are reduced, the installation quality of the pump is improved, the working efficiency is greatly improved, the failure rate of the pump caused by unbalance of a rotor is reduced by about 30%, the damage rate of accessories of the pump is reduced, the cost is reduced, and the purposes of saving energy and reducing consumption are achieved.
3. The bearing design is adopted, so that the bearing and the shaft neck of the pump shaft do relative rotation movement, thereby reducing the rotation friction coefficient of the shaft neck, reducing the friction damage to the shaft neck and playing a role in protecting the shaft neck part.
4. The design of the bearing is adopted to ensure that the rotor rotates more stably, at a uniform speed and flexibly, the dial indicator probe rod and parts in the dial indicator are protected, the service life of the parts in the centrifugal pump is effectively prolonged, the running period of the centrifugal pump is further prolonged, and the centrifugal pump is enabled to run in an economic area with high efficiency.
5. The whole device has extremely strong test assistance, the design principle accords with the technical requirement, the test defect of the simple bracket in the past is skillfully avoided, the test accuracy can be ensured relatively by the operation of a test staff which is inexperienced in time, and each measuring point can reach the standard only by measuring once, so that the working efficiency is improved.
6. The hydraulic pump is suitable for maintenance of oil field station posts and pumps, is also suitable for staff skill operation training, has a wide application range, and has extremely high popularization value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a multi-stage centrifugal pump rotor assembly test stand of the present invention;
FIG. 2 is a left side view of the multi-stage centrifugal pump rotor assembly test stand of the present invention;
wherein: the device comprises a 1-bottom plate, a 2-support, a 3-top frame, a 4-screw jackscrew, a 5-bearing, a 6-notch, a 7-fine adjustment slide way, an 8-screw frame, a 9-first adjustment slide way, a 10-jackscrew nut, an 11-second adjustment slide way, a 12-locking bolt, a 13-nut, a 14-slide bar, a 15-slide way, a 16-vertical rod, a 17-leveling nut, an 18-steel plate and a 19-fixed plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the invention without any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," and "right" indicate orientations or positional relationships based on the orientations and positional relationships illustrated in the drawings, merely to facilitate the description of the structures and operation, and do not indicate or imply that the parts referred to must have a particular orientation, operate in a particular orientation, and thus are not to be construed as limiting the invention.
The invention aims to provide a multistage centrifugal pump rotor assembly test support table, which solves the problems in the prior art and enhances the stability in the test process.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-2: the embodiment provides a multistage centrifugal pump rotor assembly test support platform, which comprises an operation table, a bottom plate 1 fixedly connected with the operation table, two groups of supports 2 which are arranged on the upper side of the bottom plate 1 and are oppositely arranged, a top frame 3 which is arranged on the outer side of the supports 2, a screw jackscrew 4 which is arranged on the upper side of the top frame 3 and two bearings 5 which are arranged on the upper side of each group of supports 2. The support 2 can move on the bottom plate 1, the top frame 3 can move up and down relative to the support 2, the screw jackscrew 4 can rotate relative to the top frame 3 and can move up and down relative to the top frame 3, the bearing 5 is rotationally connected with the support 2, and the bearing 5 can move horizontally relative to the support 2. The upper side of the support 2 is provided with a notch 6 for passing through the journal, the notch 6 preferably being of the "V" shape. One side of the journal is clamped between two bearings 5 arranged on one group of brackets 2, the other side of the journal is clamped between two bearings 5 arranged on the other group of brackets 2, and one ends of two screw jackscrews 4 are respectively propped against one end face of the journal.
Specifically, a fine tuning slide way 7 is respectively arranged at two sides of the notch 6, a screw rod frame 8 is arranged in the fine tuning slide way 7, the screw rod frame 8 can horizontally move in the fine tuning slide way 7, the bearing 5 is sleeved on the screw rod frame 8, and two ends of the screw rod frame 8 can be fixed on the bracket 2 through fixing nuts. The bearing 5 is in interference fit with the support 2, so that the bearing 5 and the support 2 are guaranteed to be free of friction, and abrasion to the bearing 5 and the support 2 is reduced. The distance between the two bearings 5 on the same set of brackets 2 matches the outer diameter of the journal, in particular the distance between the two bearings 5 is preferably adjusted in the range of 10-20mm. The pitch adjustment process of the bearing 5 comprises the following steps: after the distance between the two bearings 5 is adjusted in place according to the size of the journal, the fixing nuts at the two ends of the screw frame 8 are screwed, and the screw frame 8 is fixed on the bracket 2.
The roof-rack 3 is "Z" type, and roof-rack 3 sets up in the middle part of support 2, and the upside of roof-rack 3 is equipped with a first regulation spout 9 in the horizontal direction, and the other end of screw rod jackscrew 4 can reciprocate and can control the removal in first regulation spout 9 through first regulation spout 9, and screw rod jackscrew 4 can be fixed in on the roof-rack 3 through jackscrew nut 10. The downside of roof-rack 3 is equipped with a second regulation spout 11 in vertical direction, and roof-rack 3 can reciprocate on support 2 through second regulation spout 11, is equipped with a lock bolt 12 in the second regulation spout 11, and roof-rack 3 can be fixed in on support 2 through lock bolt 12. The adjusting process of the top frame 3 and the screw jackscrew 4 is as follows: and (3) keeping the pump shaft horizontal, adjusting the position of the top frame 3 on the bracket 2 up and down according to the specific position of the end surface of the pump shaft, adjusting the position of the screw jackscrew 4 up and down and left and right, finally positioning the screw jackscrew 4 at the center position of the end surface of the pump shaft, and screwing the jackscrew nut 10 and the locking bolt 12 after adjusting in place.
The bottom plate 1 is provided with a plurality of slide ways 15, the bracket can move left and right on the bottom plate 1 through the slide ways 15, slide bars 14 are arranged in the slide ways 15, and the slide bars 14 can be fixedly connected with the bottom plate 1 through nuts 13. The bracket 2 comprises a fixed plate 19 and two steel plates 18 welded on the upper side of the fixed plate 19, fixedly connected with the fixed plate 19 and arranged side by side, two bearings 5 on the same bracket 2 are horizontally arranged between the two steel plates 18, and the fixed plate 19 can slide on the bottom plate 1. The process of adjusting the bracket 2 is as follows: the two groups of brackets 2 are adjusted to be in place on the bottom plate 1 according to the length of the pump shaft and the front and back sliding brackets 2, and after the brackets 2 are adjusted to be in place, the brackets 2 are fixed on the bottom plate 1 by screwing nuts 13. Four vertical rods 16 are uniformly distributed on the lower side of the bottom plate 1, the upper ends of the vertical rods 16 can be adjusted in height through leveling nuts 17, and the lower ends of the vertical rods 16 are fixed on an operating table. The height of the upright post is adjusted through the leveling nut 17, so that the rotor assembly is always in a horizontal state on the operation table, and the detection precision is improved. The dimensions of the steel plate 18 are preferably 100mm×80mm×10mm, the dimensions of the base plate 1 are preferably 150mm×80mm×10mm, and the dimensions of the operation table are preferably 1100mm×1200mm×50mm.
According to the embodiment, the vertical support 2 is connected with the bottom plate 1 with the slide way 15, so that the rotor assembly can be stably supported, the stability in the testing process is enhanced, the Z-shaped top frame 3 is adopted on two sides of the pump shaft to support, the phenomenon that the pump shaft moves in the transverse direction during testing is avoided, the non-deviation of a measuring point during the rotation of the pump shaft is ensured, the accuracy of measuring data is further ensured, the detection precision is improved, the measuring precision is 0.05-0.10 mm in diameter and is accurate to about 0.03mm, the measuring standard is greatly improved, the data support is provided for the next repairing machine part, unnecessary machining procedures and calibration procedures are reduced, the installation quality of the pump is improved, the working efficiency is greatly improved, the failure rate of the pump caused by unbalance of the rotor is reduced by about 30%, the damage rate of accessories of the pump is reduced, the cost is reduced, and the purposes of saving energy and reducing consumption are achieved; the bearing design is adopted, so that the bearing 5 and the shaft neck of the pump shaft do relative rotation, the rotation friction coefficient of the shaft neck is reduced, the friction damage to the shaft neck is reduced, the effect of protecting the shaft neck part is achieved, in addition, the design of the bearing 5 is adopted, the rotor rotates more stably, uniformly and flexibly, the dial indicator probe rod and parts in the dial indicator are protected, the service life of the parts in the centrifugal pump is effectively prolonged, the running period of the centrifugal pump is further prolonged, and the centrifugal pump is enabled to run in an economic area with high efficiency; the whole device has extremely strong test assistance, the design principle accords with the technical requirement, the test defect of the simple bracket in the past is skillfully avoided, the test accuracy can be ensured relatively by the operation of a timely inexperienced detector, and each measuring point can reach the standard only by measuring once, so that the working efficiency is improved, the device is suitable for maintenance of oil field station posts and machine pumps, is also suitable for the skill operation training of staff, has wide application range and extremely strong popularization value. The support table in the embodiment has wide application field, strong operability and high flexibility, and is also suitable for support tables in the process of electrical test and inspection equipment.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A multistage centrifugal pump rotor assembly test support platform which characterized in that: comprises an operation table, a bottom plate fixedly connected with the operation table, two groups of brackets which are arranged on the upper side of the bottom plate and are oppositely arranged, a top frame which is arranged on the outer side of the brackets, a screw jackscrew which is arranged on the upper side of the top frame, and two bearings which are arranged on the upper side of each group of brackets, wherein the brackets can move on the bottom plate, the top frame can move up and down relative to the brackets, the screw jackscrew can rotate relative to the top frame and can move up and down relative to the top frame, the bearings are rotationally connected with the brackets, the bearings can horizontally move relative to the brackets, the upper side of the brackets is provided with a notch for passing through a journal, one side of the journal is clamped between the two bearings arranged on one group of brackets, the other side of the journal is clamped between the two bearings arranged on the other group of brackets, one end of each screw jackscrew is propped against one end face of the shaft neck, two sides of each notch are respectively provided with a fine adjustment slide way, a screw rod frame is arranged in each fine adjustment slide way, each screw rod frame can horizontally move in each fine adjustment slide way, each bearing is sleeved on each screw rod frame, two ends of each screw rod frame can be fixed on each bracket through fixing nuts, each top frame is Z-shaped, each top frame is arranged in the middle of each bracket, a first adjustment chute is arranged on the upper side of each top frame in the horizontal direction, the other end of each screw rod jackscrew can vertically move through each first adjustment chute and can horizontally move in each first adjustment chute, each screw rod jackscrew can be fixed on each top frame through each jackscrew nut, a second adjustment chute is arranged on the lower side of each top frame in the vertical direction, the roof-rack can be in through the second regulation spout the support reciprocates, be equipped with a lock bolt in the second regulation spout, the roof-rack can be through the lock bolt is fixed in on the support, be equipped with a plurality of slides on the bottom plate, the support can be in through the slide is in left and right sides on the bottom plate is removed, be equipped with the slide bar in the slide, the slide bar can pass through the nut with bottom plate fixed connection.
2. The multistage centrifugal pump rotor assembly test stand according to claim 1, wherein: the bearings are in interference fit with the brackets, and the distance between the two bearings on the same group of brackets is matched with the outer diameter of the shaft neck.
3. The multistage centrifugal pump rotor assembly test stand according to claim 1, wherein: the support include the fixed plate and set up in the fixed plate upside, with fixed plate fixed connection just two steel sheets that set up side by side, same two on the support the bearing level set up in two between the steel sheet, the fixed plate can be in slide on the bottom plate.
4. The multistage centrifugal pump rotor assembly test stand according to claim 1, wherein: four vertical rods are uniformly distributed on the lower side of the bottom plate, the upper ends of the vertical rods can be adjusted in height through leveling nuts, and the lower ends of the vertical rods are fixed on the operating table.
5. A multistage centrifugal pump rotor assembly test stand according to claim 3, wherein: the steel plate has dimensions of 100mm×80mm×10mm, the base plate has dimensions of 150mm×80mm×10mm, and the console has dimensions of 1100mm×1200mm×50mm.
6. The multistage centrifugal pump rotor assembly test stand according to claim 1, wherein: the notch is of a V shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047949.XA CN109655202B (en) | 2019-01-18 | 2019-01-18 | Multistage centrifugal pump rotor assembly test support platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047949.XA CN109655202B (en) | 2019-01-18 | 2019-01-18 | Multistage centrifugal pump rotor assembly test support platform |
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| Publication Number | Publication Date |
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| CN109655202A CN109655202A (en) | 2019-04-19 |
| CN109655202B true CN109655202B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910047949.XA Active CN109655202B (en) | 2019-01-18 | 2019-01-18 | Multistage centrifugal pump rotor assembly test support platform |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4858393A (en) * | 1987-02-24 | 1989-08-22 | Ngk Insulators, Ltd. | Method of dynamically balancing cylindrical rotors, and device for carrying out the method |
| CN2809617Y (en) * | 2005-07-29 | 2006-08-23 | 江津增压器厂 | Dynamic balance tester for air compressing impeller with blind hole |
| CN201000393Y (en) * | 2007-01-31 | 2008-01-02 | 岳阳大陆激光技术有限公司 | Multifunctional single, double rotating member check, detection, research simulation device |
| CN104006712A (en) * | 2014-05-28 | 2014-08-27 | 中广核核电运营有限公司 | Tool for measuring rotor of charging pump of RCV |
| CN207019576U (en) * | 2017-07-18 | 2018-02-16 | 王惠玲 | A kind of centrifugal pump rotor detection platform |
| CN209264188U (en) * | 2019-01-18 | 2019-08-16 | 卞洪丽 | A kind of Multistage centrifugal pump rotor assembly test bracket platform |
-
2019
- 2019-01-18 CN CN201910047949.XA patent/CN109655202B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4858393A (en) * | 1987-02-24 | 1989-08-22 | Ngk Insulators, Ltd. | Method of dynamically balancing cylindrical rotors, and device for carrying out the method |
| CN2809617Y (en) * | 2005-07-29 | 2006-08-23 | 江津增压器厂 | Dynamic balance tester for air compressing impeller with blind hole |
| CN201000393Y (en) * | 2007-01-31 | 2008-01-02 | 岳阳大陆激光技术有限公司 | Multifunctional single, double rotating member check, detection, research simulation device |
| CN104006712A (en) * | 2014-05-28 | 2014-08-27 | 中广核核电运营有限公司 | Tool for measuring rotor of charging pump of RCV |
| CN207019576U (en) * | 2017-07-18 | 2018-02-16 | 王惠玲 | A kind of centrifugal pump rotor detection platform |
| CN209264188U (en) * | 2019-01-18 | 2019-08-16 | 卞洪丽 | A kind of Multistage centrifugal pump rotor assembly test bracket platform |
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| CN109655202A (en) | 2019-04-19 |
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Effective date of registration: 20240102 Address after: 264000 East End of Gongshang Street, Muping District, Yantai City, Shandong Province Applicant after: Yantai Donggang Corrosion resistant Pump Co.,Ltd. Address before: 163000 Room 401, gate 3, No. 1-29, Wanbao community, heat source street, Sartu District, Daqing City, Heilongjiang Province Applicant before: Bian Hongli |
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