CN116928113A - Axial force measuring device of multistage centrifugal pump - Google Patents
Axial force measuring device of multistage centrifugal pump Download PDFInfo
- Publication number
- CN116928113A CN116928113A CN202311176598.5A CN202311176598A CN116928113A CN 116928113 A CN116928113 A CN 116928113A CN 202311176598 A CN202311176598 A CN 202311176598A CN 116928113 A CN116928113 A CN 116928113A
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- force measuring
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- rotating shaft
- centrifugal pump
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- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 230000000712 assembly Effects 0.000 abstract description 6
- 238000000429 assembly Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an axial force measuring device of a multistage centrifugal pump, which is characterized in that two radial thrust ball bearings and corresponding force measuring assemblies are arranged on a rotating shaft, inner rings of the two radial thrust ball bearings are arranged on the rotating shaft and rotate along with the rotating shaft, outer rings of the two radial thrust ball bearings are respectively abutted against corresponding force measuring mechanisms, when the rotating shaft receives axial force, the inner rings of the radial thrust ball bearings move along the axial direction along the rotating shaft so as to drive the outer rings to synchronously move along the axial direction, the outer rings are pressed on the force measuring assemblies at corresponding sides along the axial direction, the running state of a multistage centrifugal pump rotor is monitored through the axial force at the moment fed back by the force measuring assemblies, corresponding measures are timely made, the stable running of a unit is ensured, the service life of the unit is prolonged, and the axial force measuring device of the multistage centrifugal pump is simple in structure, convenient and feasible in monitoring operation, and can ensure the accuracy of monitoring the axial force.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to an axial force measuring device of a multistage centrifugal pump.
Background
The multistage centrifugal pump is a common pump in the process industry and is characterized by high lift and large flow, and an axial force balancing structure or device is usually designed in the structure to reduce the axial force on a main shaft bearing during design, but the design of the balancing mechanism is often different from that of the practical application, so that the axial force is not balanced well, and the pump is early failed in the use process and needs maintenance, therefore, the problem that needs to be solved is how to conveniently and reliably verify and test the theoretical design to provide parameters needed by correction design during sample test; meanwhile, the axial force change of the multistage centrifugal pump is an important parameter capable of directly reflecting the running state of the multistage centrifugal pump rotor in the running process of the multistage centrifugal pump, so that the real-time monitoring of the axial force of the running multistage pump is also necessary for monitoring the running state of the multistage centrifugal pump rotor, accident prediction can be realized by monitoring the running state of the multistage centrifugal pump rotor, corresponding measures can be timely made, stable running of a unit is ensured, and the service life of the unit is prolonged. The existing measuring device for axial force of the multistage centrifugal pump is complex in most cases, the measuring operation is inconvenient, and the measuring result error is large.
Disclosure of Invention
The invention aims to provide a device for measuring axial force of a multistage centrifugal pump, which solves the problems that the device for measuring the axial force of the multistage centrifugal pump in the prior art is mostly complex, the measurement operation is inconvenient, and the error of the measurement result is larger.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the axial force measuring device of the multistage centrifugal pump comprises a shell, an end cover, a rotating shaft, a force measuring mechanism and a pressing piece, wherein a first end of the rotating shaft is used for being connected with a main shaft of the centrifugal pump, and a second end of the rotating shaft is rotatably arranged in the shell;
the force measuring mechanism is arranged in the shell and comprises two radial thrust ball bearings and two force measuring components, the inner rings of the two radial thrust ball bearings are adjacent and are oppositely arranged on the rotating shaft, the two force measuring components are respectively abutted to the two sides of the outer ring of the two radial thrust ball bearings and used for measuring the axial displacement of the radial thrust ball bearings, and the pressing piece is arranged on the rotating shaft and used for pressing the inner rings of the radial thrust ball bearings.
Further, the axis of rotation includes first axle section and second axle section, the external diameter of second axle section is less than first axle section, first axle section pass through split slide bearing rotate install in the casing, force measuring mechanism with the compact heap is located in proper order on the second axle section and be close to first axle section.
Further, annular grooves are correspondingly formed in the shell and the end cover, the annular grooves are respectively positioned on two sides of the two radial thrust ball bearings, the force measuring assembly is arranged in the annular grooves, and the axial directions of the annular grooves are consistent with the axial directions of the rotating shafts;
the force measuring assembly comprises a first force measuring ring, a force measuring sensor, a second force measuring ring and an adjusting screw which are sequentially arranged, wherein the first force measuring ring is arranged between the radial thrust ball bearing and the force measuring sensor, the second force measuring ring is arranged between the force measuring sensor and the adjusting screw, and the adjusting screw is screwed into the bottom of the annular groove along the axial direction of the rotating shaft to be abutted against the end face of the second force measuring ring.
Further, the annular groove comprises a mounting portion, an opening portion and a threaded hole axially formed in the bottom of the annular groove, an opening groove is formed in the inner side of the opening portion in an opening mode, the adjusting screw is connected with the threaded hole in a matched mode, the force measuring sensor and the second force measuring ring are arranged in the mounting portion, and the first force measuring ring is arranged in the opening portion.
Further, one end of the shell is penetrated by the rotating shaft, the other end of the shell is opened, and the end cover is arranged at the opened end of the shell.
Further, the pressing piece comprises a pressing sleeve and a nut, the pressing sleeve is sleeved on the second shaft section and is abutted against the inner ring of one of the centripetal thrust ball bearings, the nut is mounted on the second shaft section in a matched mode and is abutted against the outer side of the pressing sleeve, and the inner ring of the other centripetal thrust ball bearing is abutted against the shaft shoulder between the first shaft section and the second shaft section.
Further, an oil pool is further arranged in the shell, and an oil slinger is arranged on the rotating shaft.
Further, the oil slinger comprises a first ring, a second ring and a third ring, wherein the first ring is arranged on the pressing sleeve, and the second ring and the third ring are respectively arranged on the first shaft section and positioned in the half sliding bearing.
Further, a first avoidance space for installing the first ring is formed in the end cover; and/or a second avoidance space for installing the second ring and the third ring is arranged in the split sliding bearing.
Further, a sealing element is arranged at the joint of the rotating shaft and the shell.
The invention provides an axial force measuring device of a multistage centrifugal pump, which comprises a shell, a rotating shaft, a force measuring mechanism and a pressing piece, wherein the rotating shaft is connected with a main shaft of the centrifugal pump for synchronous rotation, an axial stress state is transmitted to the rotating shaft in the running process of a rotor of the centrifugal pump, the axial force change of the rotating shaft is reflected, two radial thrust ball bearings and corresponding force measuring assemblies are arranged on the rotating shaft, the inner rings of the two radial thrust ball bearings are arranged on the rotating shaft and rotate along with the rotating shaft, the outer rings are respectively abutted with the corresponding force measuring mechanisms, when the rotating shaft receives axial force, the inner rings of the radial thrust ball bearings move along the axial direction along the rotating shaft so as to drive the outer rings to move along the axial direction, the outer rings are pressed on the force measuring assemblies at the corresponding sides along the axial direction, the running state of the rotor of the multistage centrifugal pump is monitored through the axial force at the moment fed back position of the force measuring assemblies, so that accident prediction is realized, corresponding measures are timely made, the stable running of a unit is ensured, the service life of the unit is prolonged, the axial force measuring device of the multistage centrifugal pump is simple in structure, the monitoring operation is convenient and feasible, and the accuracy of the axial force can be ensured; the axial force measuring device is characterized in that the rotating shaft, the force measuring mechanism, the pressing piece and other components are assembled in the shell to form an independent axial force measuring module structure, so that the axial force measuring device can be used as a special measuring device for testing a prototype, and can be conveniently assembled with a multistage centrifugal pump to be used as a real-time monitoring module in the operation process of the pump.
Drawings
FIG. 1 is a schematic cross-sectional view of an axial force measuring device of a multistage centrifugal pump in an embodiment of the present invention;
FIG. 2 is a schematic structural view of an end cap in an embodiment of the invention;
FIG. 3 is a schematic axial section of an end cap in accordance with an embodiment of the present invention;
fig. 4 is a partial cross-sectional view taken along A-A in fig. 1.
In the figure: 1. a housing; 2. a rotating shaft; 3. a force measuring mechanism; 4. a pressing member; 5. a split sliding bearing; 6. an end cap; 7. an oil pool; 8, sealing piece; 11. a ring groove; 111. a threaded hole; 112. a mounting part; 113. an opening portion; 301. radial thrust ball bearings; 302. a first force measuring ring; 303. a load cell; 304. a second force measuring ring; 305. adjusting a screw; 401. pressing the sleeve; 402. a nut; 51. an upper half of the bearing; 52. a lower half of the bearing; 501. a second avoidance space 601, a first avoidance space; 71. oil slinger; 711. a first ring; 712. a second ring; 713. and a third ring.
Description of the embodiments
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 those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, an embodiment of the present invention provides an axial force measuring device for a multistage centrifugal pump, which includes a housing 1, an end cover 6, a rotating shaft 2, a force measuring mechanism 3 and a pressing member 4, wherein a first end of the rotating shaft 2 is used for being connected with a spindle of the centrifugal pump so that a rotating state of the spindle can be transferred to the rotating shaft 2, a second end of the rotating shaft 2 is rotatably mounted in the housing 1, and in this embodiment, the rotating shaft 2 is preferably rotatably mounted in the housing 1 through a split sliding bearing 5;
the force measuring mechanism 3 is arranged in the shell 1, the force measuring mechanism 3 comprises two radial thrust ball bearings 301 and two force measuring components, the inner rings of the two radial thrust ball bearings 301 are adjacent and are oppositely arranged on the rotating shaft 2, the two force measuring components are respectively abutted to the two sides of the outer ring of the two radial thrust ball bearings 301 and used for measuring the axial displacement of the radial thrust ball bearings 301, and the pressing piece 4 is arranged on the rotating shaft 2 and used for pressing the inner rings of the radial thrust ball bearings 301 so as to prevent the radial thrust ball bearings 301 from freely moving along the rotating shaft 2.
Specifically, when in use, the rotating shaft 2 and the main shaft of the centrifugal pump are synchronously rotated through the rigid coupling, the shell 1 is connected with the bearing body end of the centrifugal pump through the fastening piece, thus the axial force change of the rotor of the centrifugal pump is transmitted to the axial displacement of the rotating shaft 2 and converted into the pressure change of the force sensor 303, through arranging two centripetal thrust ball bearings 301 and corresponding force measuring components on the rotating shaft 2, the inner rings of the two centripetal thrust ball bearings 301 are arranged on the rotating shaft 2 to rotate along with the rotating shaft 2, the outer rings are respectively abutted against the corresponding force measuring mechanisms 3, when the rotating shaft 2 receives axial force, the inner rings of the centripetal thrust ball bearings 301 move along the axial direction along the rotating shaft 2 and then drive the outer rings to move along the axial direction, the outer rings can be tightly pressed on the force measuring components on the corresponding side to generate pressure on the force sensor 303, the axial force at the moment can be used for monitoring the running state of the rotor of the multistage centrifugal pump to realize prediction, corresponding measures can be timely made to ensure the stable running of the unit, the service life of the multistage centrifugal pump is simple in structure, the monitoring operation is convenient, and the accurate monitoring performance of the axial force monitoring unit is ensured; the axial force measuring device is characterized in that the rotating shaft 2, the force measuring mechanism 3, the pressing piece 4 and other components are assembled in the shell 1 to form an independent axial force measuring module structure, so that the axial force measuring device can be used as a special measuring device for a prototype test, can be conveniently assembled with a multistage centrifugal pump to be used as a component of the multistage centrifugal pump, and is used as a real-time monitoring module in the pump operation process.
Further, the rotating shaft 2 includes a first shaft section and a second shaft section, the outer diameter of the second shaft section is smaller than that of the first shaft section, so that a shaft shoulder can be formed at a position between the first shaft section and the second shaft section, the first shaft section is rotatably mounted in the housing 1 through the split sliding bearing 5, and referring to fig. 1, the split sliding bearing 5 includes a bearing upper half 51 and a bearing lower half 52, wherein the bearing upper half 51 is fixedly connected with an upper portion of an inner wall of the housing 1, a lower portion of the bearing is fixedly connected with a lower portion of the inner wall of the housing 1, so as to support the rotating shaft 2 in the housing 1 and smoothly slide along the shaft direction, and the force measuring mechanism 3 and the pressing member 4 are sequentially arranged on the second shaft section and are close to the first shaft section, that is, an inner ring end face of a radial thrust ball bearing 301 at a position close to the shaft shoulder of the force measuring mechanism 3 can be abutted against the shaft shoulder, so that positioning and stability of the mounting of the force measuring mechanism 3 are ensured.
Further, annular grooves 11 are correspondingly formed in the shell 1 and the end cover 6, the annular grooves 11 are respectively positioned on two sides of the two radial thrust ball bearings 301, the force measuring components are arranged in the annular grooves 11, the axial direction of the annular grooves 11 is consistent with that of the rotating shaft 2, and by arranging the annular grooves 11, the force measuring components of the force measuring mechanism 3 can be supported and installed on one hand, and on the other hand, the annular grooves 11 can protect the force measuring components and prevent the force measuring components from being damaged in a violent manner in the rotating process of the rotating shaft 2; specifically, the force measurement assembly includes a first force measurement ring 302, a force measurement sensor 303, a second force measurement ring 304 and an adjusting screw 305 sequentially arranged, the first force measurement ring 302 is arranged between the radial thrust ball bearing 301 and the force measurement sensor 303, the second force measurement ring 304 is arranged between the force measurement sensor 303 and the adjusting screw 305, the adjusting screw 305 is screwed and stretches into the bottom of the annular groove 11 along the axial direction of the rotating shaft 2 to abut against the end face of the second force measurement ring 304, the close contact of the second force measurement ring 304, the force measurement sensor 303, the first force measurement ring 302 and the corresponding end face of the outer ring of the radial thrust ball bearing 301 is ensured through the adjusting screw 305, the first force measurement ring 302 can avoid the damage to the sensor caused by direct extrusion of the force measurement sensor 303 when the radial thrust ball bearing 301 is driven to axially displace when the rotating shaft 2 is axially moved, and likewise, the second force measurement ring 304 is arranged can avoid the direct action of the adjusting screw 305 on the face of the force measurement sensor 303 in the adjusting process to cause damage to the sensor.
In general, the force measuring sensors 303 are three and uniformly distributed along the circumference in the ring groove 11, and by arranging the first force measuring ring 302 and the second force measuring ring 304 at two ends of the force measuring sensor 303 and simultaneously arranging three adjusting bolts 305 corresponding to the force measuring sensors 303, the axial position of the second force measuring ring 304 can be conveniently adjusted, so that the geometrical error of the force measuring sensors 303 is eliminated, the three force measuring sensors 303 can be tightly abutted with the corresponding end surfaces of the first force measuring ring 302, the axial force corresponding to the radial thrust ball bearing 301 is ensured to be uniformly transmitted to each force measuring sensor 303, the measurement accuracy is improved, and the force measuring sensors 303 are conveniently protected. The axial force measuring device of the multistage centrifugal pump is an independent module, so that when the pump set is assembled, only the corresponding end surfaces of the shell 1 and the bearing body of the centrifugal pump are required to be connected, and then the rotating shaft 2 is connected with the main shaft of the centrifugal pump, thereby greatly facilitating the installation and maintenance.
More specifically, the ring groove 11 includes a mounting portion 112, an opening portion 113 and a threaded hole 111 axially disposed at the bottom of the ring groove 11, an opening groove is formed by opening the inner side of the opening portion 113, and an adjusting screw 305 is cooperatively connected with the threaded hole 111, so that the second force measuring ring 304 is conveniently adjusted by the adjusting screw 305 to ensure that the second force measuring ring 304 is in close contact with each force measuring sensor 303, the force measuring sensors 303 and the second force measuring ring 304 are disposed in the mounting portion 112 to protect and support the force measuring sensors 303, and the first force measuring ring 302 is disposed in the opening portion 113 to limit in the radial direction and can smoothly axially displace, so that the first force measuring ring 302 can better contact with the outer ring end surface of the corresponding radial thrust ball bearing 301 through the opening portion 113, and the axial displacement of the radial thrust ball bearing 301 can be better transferred to the force measuring sensors 303.
In the axial force measuring device for the multistage centrifugal pump, one end of the casing 1 is penetrated by the rotating shaft 2, the other end of the casing 1 is opened, the end cover 6 is covered at the opened end of the casing 1, the installation and maintenance of parts inside the casing 1 are facilitated by arranging the end cover 6, one ring groove 11 is arranged in the end cover 6, the other ring groove 11 is arranged inside the casing 1, the space inside the casing 1 of the end cover 6 can be reasonably utilized, and the structural interference is reduced. Preferably, in this embodiment, the sealing member 8 is disposed at the connection position between the rotating shaft 2 and the housing 1, where the sealing member 8 may be a mechanical sealing member, a labyrinth sealing member or a sealing ring, which is not specifically limited herein, and may be flexibly selected according to the use scenario, so that high-temperature lubricating oil or medium on one side of the multistage centrifugal pump may be prevented from entering the housing 1 by the sealing member 8, thereby ensuring measurement performance and measurement accuracy of the force measuring mechanism 3.
Further, the pressing piece 4 includes a pressing sleeve 401 and a nut 402, the pressing sleeve 401 is sleeved on the second shaft section and is abutted with the inner ring of one of the radial thrust ball bearings 301, the nut 402 is mounted on the second shaft section in a matched manner and is abutted on the outer side of the pressing sleeve 401, the inner ring of the other radial thrust ball bearing 301 is abutted on the shaft shoulder between the first shaft section and the second shaft section, the two sides of the two radial thrust ball bearings 301 are respectively and firmly pressed through the pressing piece 4 and the shaft shoulder, the sliding of the radial thrust ball bearings 301 on the rotating shaft 2 is avoided, the accuracy of the spindle axial centripetal force measurement is affected, and here, an adjusting pad can be further mounted between the shaft shoulder and the inner ring of the corresponding radial thrust ball bearing 301 to adjust the optimal position of the radial thrust ball bearing 301 in the axial direction.
In order to realize that the bearing is lubricated and the smoothness of rotation of the rotating shaft 2 is ensured, an oil pool 7 is further arranged in the shell 1, an oil slinger 71 is arranged on the rotating shaft 2, the lubricating oil in the oil pool 7 is brought onto the bearing through the oil slinger 71 to lubricate the bearing, and the main bearing comprises a half sliding bearing 5 and a radial thrust ball bearing 301. Specifically, the oil slinger 71 includes a first ring 711, a second ring 712 and a third ring 713, the first ring 711 is sleeved on the pressing sleeve 401, the lubricating oil brought in by the first ring 711 from the oil sump 7 is infiltrated onto the radial thrust ball bearing 301 through the pressing sleeve 401 to lubricate the radial thrust ball bearing, and likewise, the second ring 712 and the third ring 713 are respectively arranged on the first shaft section and are positioned in the half sliding bearing 5, and the lubricating oil in the oil sump 7 is brought in through the second ring 712 and the third ring 713 to lubricate the half sliding bearing 5.
Referring to fig. 2 to 4, the end cap 6 in this embodiment is provided with a first clearance space 501 for mounting the first ring 711, and the first ring 711 can rotate with the rotating shaft 2 inside the first clearance space 501 through the first clearance space 501 so as to bring in the lubricating oil in the oil pool 7; likewise, the inside of the half sliding bearing 5 is provided with a second clearance space 601 in which the second ring 712 and the third ring 713 are mounted, and the second ring 712 and the third ring 713 can rotate along with the rotating shaft 2 through the second clearance space 601 to lubricate the half sliding bearing 5, or the first ring 711, the second ring 712 and the third ring 713 can be directly arranged on the rotating shaft 2 as long as the lubrication effect on the corresponding bearings can be achieved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An axial force measuring device of a multistage centrifugal pump, which is characterized in that: the centrifugal pump comprises a shell, an end cover, a rotating shaft, a force measuring mechanism and a compressing piece, wherein a first end of the rotating shaft is used for being connected with a main shaft of the centrifugal pump, and a second end of the rotating shaft is rotatably arranged in the shell;
the force measuring mechanism is arranged in the shell and comprises two radial thrust ball bearings and two force measuring components, the inner rings of the two radial thrust ball bearings are adjacent and are oppositely arranged on the rotating shaft, the two force measuring components are respectively abutted to the two sides of the outer ring of the two radial thrust ball bearings and used for measuring the axial displacement of the radial thrust ball bearings, and the pressing piece is arranged on the rotating shaft and used for pressing the inner rings of the radial thrust ball bearings.
2. The multistage centrifugal pump axial force measurement device according to claim 1, wherein: the rotating shaft comprises a first shaft section and a second shaft section, the outer diameter of the second shaft section is smaller than that of the first shaft section, the first shaft section is rotatably mounted in the shell through a split sliding bearing, and the force measuring mechanism and the pressing piece are sequentially arranged on the second shaft section and close to the first shaft section.
3. The multistage centrifugal pump axial force measurement device according to claim 2, wherein: the shell and the end cover are correspondingly provided with annular grooves, the annular grooves are respectively positioned at two sides of the two radial thrust ball bearings, the force measuring assembly is arranged in the annular grooves, and the axial direction of the annular grooves is consistent with the axial direction of the rotating shaft;
the force measuring assembly comprises a first force measuring ring, a force measuring sensor, a second force measuring ring and an adjusting screw which are sequentially arranged, wherein the first force measuring ring is arranged between the radial thrust ball bearing and the force measuring sensor, the second force measuring ring is arranged between the force measuring sensor and the adjusting screw, and the adjusting screw is screwed into the bottom of the annular groove along the axial direction of the rotating shaft to be abutted against the end face of the second force measuring ring.
4. A multistage centrifugal pump axial force measurement device according to claim 3, wherein: the annular groove comprises a mounting part, an opening part and a threaded hole axially arranged at the bottom of the annular groove, an opening groove is formed by opening the inner side of the opening part, the adjusting screw is connected with the threaded hole in a matched mode, the force measuring sensor and the second force measuring ring are arranged in the mounting part, and the first force measuring ring is arranged in the opening part.
5. The multistage centrifugal pump axial force measurement device according to claim 4, wherein: one end of the shell is used for the rotation shaft to penetrate, the other end of the shell is opened, and the end cover is arranged at the opened end of the shell.
6. The multistage centrifugal pump axial force measurement device according to claim 5, wherein: the pressing piece comprises a pressing sleeve and a nut, wherein the pressing sleeve is sleeved on the second shaft section and is abutted against the inner ring of one of the radial thrust ball bearings, the nut is installed on the second shaft section in a matched mode and is abutted against the outer side of the pressing sleeve, and the inner ring of the other radial thrust ball bearing is abutted against the shaft shoulder between the first shaft section and the second shaft section.
7. The multistage centrifugal pump axial force measurement device according to claim 6, wherein: an oil pool is further arranged in the shell, and an oil slinger is arranged on the rotating shaft.
8. The multistage centrifugal pump axial force measurement device according to claim 7, wherein: the oil slinger comprises a first ring, a second ring and a third ring, wherein the first ring is arranged on the pressing sleeve, and the second ring and the third ring are respectively arranged on the first shaft section and positioned in the half sliding bearing.
9. The multistage centrifugal pump axial force measurement device according to claim 8, wherein: a first avoidance space for installing the first ring is formed in the end cover; and/or a second avoidance space for installing the second ring and the third ring is arranged in the split sliding bearing.
10. The multistage centrifugal pump axial force measurement device according to claim 1, wherein: and a sealing element is arranged at the joint of the rotating shaft and the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311176598.5A CN116928113A (en) | 2023-09-13 | 2023-09-13 | Axial force measuring device of multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311176598.5A CN116928113A (en) | 2023-09-13 | 2023-09-13 | Axial force measuring device of multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116928113A true CN116928113A (en) | 2023-10-24 |
Family
ID=88386379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311176598.5A Pending CN116928113A (en) | 2023-09-13 | 2023-09-13 | Axial force measuring device of multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116928113A (en) |
-
2023
- 2023-09-13 CN CN202311176598.5A patent/CN116928113A/en active Pending
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