CN214674735U - Counterweight structure for vertical pump unit motor system and vertical pump unit motor system - Google Patents
Counterweight structure for vertical pump unit motor system and vertical pump unit motor system Download PDFInfo
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- CN214674735U CN214674735U CN202120371830.0U CN202120371830U CN214674735U CN 214674735 U CN214674735 U CN 214674735U CN 202120371830 U CN202120371830 U CN 202120371830U CN 214674735 U CN214674735 U CN 214674735U
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Abstract
The embodiment of the utility model discloses vertical pump package is counter weight structure and vertical pump package motor system for motor system. Vertical pump package is counter weight structure for motor system includes: the counterweight plate comprises a first counterweight plate side surface and a second counterweight plate side surface which are oppositely arranged, wherein a counterweight hanging part for hanging a counterweight is arranged on the first counterweight plate side surface; the counterweight plate positioning disc is connected with the counterweight plate and comprises a first positioning disc side surface and a second positioning disc side surface which are oppositely arranged; the side surface of the second counterweight plate is adjacent to the side surface of the first positioning plate, and the second counterweight plate and the side surface of the first positioning plate are positioned through the first positioning spigot part; the side surface of the second positioning plate is used for connecting a vertical pump set motor. The utility model discloses vertical pump package is counter weight structure for motor system has solved vertical pump package motor vibration value big on the left and the unstable problem of vibration, has reduced the vibration, has prolonged maintenance cycle and life simultaneously, reduces fortune dimension cost.
Description
Technical Field
The invention relates to the field of machinery, in particular to a counterweight structure for a vertical pump unit motor system and the vertical pump unit motor system.
Background
In order to save space and facilitate piping, vertical pump assembly motor systems for pump assembly motors, such as condensate pumps and the like, of many power plants are typically arranged in a vertical manner. And a vertical pump set motor of the condensate pump motor set is arranged at the upper part of the condensate pump. In the shaft system design of the vertical pump set motor, the structure of the condensate pump motor set is usually high and thin, and the rigidity of a machine base, the shaft system and a support is weak; in addition, in order to facilitate the installation of the shafting, a motor mounting seat (such as a coupler) of a driving motor of the condensate pump is required to be provided with a window in one direction, and a hollow hole is reserved at the center of the motor mounting seat, so that the transverse supporting rigidity of the motor mounting seat is further weakened. Therefore, the inherent defects of the vertical pump set motor system cause the problems of larger vibration value and unstable vibration.
Disclosure of Invention
Therefore, for overcoming prior art's at least partial shortcoming and not enough, the embodiment of the utility model provides a counter weight structure and use vertical pump group motor system of this counter weight structure to improve the big, the unstable problem of vibration of vertical pump group motor vibration, realize the long-term stable operation in standard qualification value range of vibration of motor.
On the one hand, the embodiment of the utility model provides a pair of vertical pump package counter weight structure for motor system, include: the counterweight disc comprises a first counterweight disc, a second counterweight disc and a disc connecting piece; the first counterweight disk and the second counterweight disk are oppositely arranged, and the disk connecting piece is connected between the first counterweight disk and the second counterweight disk; a counterweight hanging part for hanging a counterweight is arranged on the side surface of the first counterweight disc, which is far away from the second counterweight disc, of the first counterweight disc; the counterweight hooking part comprises a plurality of groups of hooking holes, and a plurality of hooking holes in each group of hooking holes are symmetrically arranged by taking the circle center of the side surface of the first counterweight disc on the first counterweight disc as the center; the side surface of the second counterweight plate, which is far away from the first counterweight plate, on the second counterweight plate is opposite to the side surface of the first counterweight plate; the counterweight disc is provided with an axial through hole which penetrates through the first counterweight disc, the second counterweight disc and the disc connecting piece; the counterweight plate positioning disc is connected with the counterweight plate and comprises a first positioning disc side surface and a second positioning disc side surface which are oppositely arranged; the side surface of the first positioning disc is adjacent to the side surface of the second counterweight disc, a first positioning stop port part is arranged on the side surface of the second counterweight disc, and the side surface of the first positioning disc extends into the first positioning stop port part; a second positioning stop port part is arranged on the side surface of the second positioning disc and used for positioning the counterweight disc positioning disc on the vertical pump set motor; the side surface of the first positioning disc is provided with an installation groove corresponding to the axial through hole, a plurality of first installation holes are formed in the installation groove, and the counterweight disc positioning disc penetrates through a plurality of connecting pieces and is connected to the vertical pump set motor through the first installation holes.
On the other hand, the embodiment of the utility model provides a pair of vertical pump package counter weight structure for motor system, include: the counterweight plate comprises a first counterweight plate side surface and a second counterweight plate side surface which are oppositely arranged, wherein a counterweight hanging part for hanging a counterweight is arranged on the first counterweight plate side surface; the counterweight plate positioning disc is connected with the counterweight plate and comprises a first positioning disc side surface and a second positioning disc side surface which are oppositely arranged; wherein the second weight plate side surface is adjacent to the first positioning plate side surface, and the second weight plate and the first positioning plate side surface are positioned through a first positioning spigot portion; and the side surface of the second positioning plate is used for connecting a vertical pump set motor.
In an embodiment of the present invention, the first positioning seam allowance is disposed on the first positioning plate side, and the second counterweight plate side extends into the first positioning seam allowance.
In an embodiment of the present invention, the first positioning seam allowance is disposed on the second counterweight plate side, and the first positioning plate side extends into the first positioning seam allowance.
In an embodiment of the present invention, the side surface of the first weight plate is circular; the counterweight hooking part comprises a plurality of groups of hooking holes, the hooking holes in each group of hooking holes are symmetrically arranged by taking the circle center of the side surface of the first counterweight disk as the center, the circles of any two groups of hooking holes in the axial direction of the center are concentric circles, and the circle centers of the concentric circles are coincided with the circle center of the side surface of the first counterweight disk.
In an embodiment of the present invention, the weight plate includes a first weight plate, a second weight plate and a plate connecting member, wherein the first weight plate and the second weight plate are disposed relatively, and the plate connecting member is connected between the first weight plate and the second weight plate, the first weight plate side is the side of the second weight plate which is far away from the first weight plate, and the second weight plate side is the side of the first weight plate which is far away from the second weight plate.
In an embodiment of the present invention, a first through hole is formed on the first balance weight disc, a second through hole is formed on the second balance weight disc, a third through hole is formed on the disc connecting member, and two ends of the disc connecting member extend into the first through hole and the second through hole respectively; and an installation groove corresponding to the third through hole is formed in the side surface of the first positioning disc, a first installation hole is formed in the installation groove, and the counterweight disc positioning disc penetrates through a threaded connecting piece and is connected to the vertical pump set motor through the first installation hole.
In an embodiment of the present invention, a second positioning stop portion is provided on a side surface of the second positioning plate, and the vertical pump unit motor extends into the second positioning stop portion to position the counterweight plate positioning plate.
Furthermore, the embodiment of the utility model provides a vertical pump package motor system, include: a vertical pump set motor; and the counterweight structure for the vertical pump unit motor system is positioned on the side surface of the second positioning plate and is connected to the vertical pump unit motor.
In another embodiment of the present invention, the vertical pump unit motor system further includes: a motor base; the stator is arranged in the motor base; a rotor disposed within the stator; the rotor shaft is arranged in the rotor and comprises a first end and a second end, and the first end extends out of the motor base and is connected to the side surface of the second positioning disk; and the fan is sleeved on the rotor shaft and is positioned between the motor base and the counterweight structure for the vertical pump set motor system.
The technical scheme has the following advantages or beneficial effects: the embodiment of the utility model provides a scheme of novel counter weight structure for vertical pump unit motor system is provided, can solve vertical pump unit motor vibration big, the unstable problem of vibration through set up the location tang structure on counter weight dish and counter weight dish positioning disk, make the vibration of motor can realize the long-term stable operation within the standard qualification value range, prolonged pump unit maintenance cycle and life, ensure unit safe and stable operation as far as possible, reduce fortune dimension cost, promote the benefit; the motor counterweight plate is provided with the counterweight holes, so that rapid counterweight and accurate counterweight can be realized, delivery vibration test of the vertical pump set motor is facilitated, and the downtime during equipment maintenance is saved; the design of two circles of weight holes with different specifications on the weight plate provides multiple choices for the specifications of weight bolts during weight balancing, reduces the precision requirement on the total mass of the weight plate, and simultaneously reduces the processing precision requirements of the weight plate and the weight plate positioning plate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a counterweight structure for a vertical pump unit motor system according to a first embodiment of the present invention;
fig. 2 is a schematic view of the structure of the weight plate shown in fig. 1;
FIG. 3 is a cross-sectional view of the weight plate H-H shown in FIG. 2;
FIG. 4 is a schematic view of the puck weight plate shown in FIG. 1;
FIG. 5 is a cross-sectional view of the puck weight plate J-J shown in FIG. 4;
fig. 6 is a schematic structural diagram of a vertical pump group motor system according to a second embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, a counterweight structure 10 for a vertical pump group motor system according to a first embodiment of the present invention includes: a weight plate 101, a weight plate positioning plate 102.
Referring to fig. 2 and 3, in particular, the weight plate 101 comprises a first weight disk 1011, a disk connector 1012 and a second weight disk 1013, the first weight disk 1011 and the second weight disk 1013 being oppositely disposed, preferably, the radius of the first weight disk 1011 is greater than the radius of the second weight disk 1013; disk connector 1012 is connected between first weighted disk 1011 and second weighted disk 1013 forming an integral component resembling an "I" shape. Wherein, the first counterweight disc is provided with a first through hole 10111, the second counterweight disc is provided with a second through hole 10131, the disc connecting piece 1012 is a hollow tubular structure, which is provided with a third through hole 10121. The two ends of the disk connecting piece 1012 extend into the first through hole 10111 and the second through hole 10131 respectively, so that an axial through hole penetrating through the first balance weight disk 1011, the disk connecting piece 1012 and the second balance weight disk 1013 is formed, the weight of the balance weight disk can be reduced, the bearing pressure of the shafting foundation is reduced, and the cost is also saved.
Referring again to fig. 2 and 3, the first weighted disk 1011 has a first weighted disk side 1014. The first weight plate side 1014 is circular in shape on the side of the first weight plate 1011 remote from the second weight plate 1013. Be provided with on the first counterweight plate side 1014 and be used for articulating the counter weight and articulate portion 10112, counter weight articulates portion 10112 includes the multiunit and articulates the hole. Preferably, the counterweight hanging part 10112 comprises an inner hanging hole and an outer hanging hole, and the outer hanging hole with a larger circle is 18
The number of the through holes and the inner ring of the hanging hole is 18
And the through hole is formed by a group of outer ring hanging holes and inner ring hanging holes which are positioned on the same radius. The plurality of the hang-up connection holes in each group of the hang-up connection holes are symmetrically arranged by taking the circle center of the side surface 1014 of the first balance weight plate as a center, the circles of the center axes of any two groups of the hang-up connection holes in the plurality of groups of the hang-up connection holes are concentric circles, and the circle center of the concentric circles is coincident with the circle center of the side surface 1014 of the first balance weight plate. When the balance weight is actually balanced, a balance weight bolt or a balance weight block with a certain weight can be hung on the balance weight hanging part 10112 for balancing weight, the mass of the balance weight bolt and the balance weight block can be adjusted in time according to the balance condition, the rapid balance weight is realized, the delivery vibration test of the vertical pump set motor is facilitated, and the downtime during equipment maintenance is saved; meanwhile, the design of the two inconsistent hanging holes provides multiple choices for the specifications of the counterweight bolt or the counterweight block during counterweight.
Referring again to fig. 3, the second weight disk 1013 has a second weight disk side 1015, and the second weight disk side 1015 is circular on the side of the second weight disk 1013 away from the first weight disk 1011. The second weight plate side 1015 is disposed opposite the first weight plate side 1014 and has a first locating stop portion 1016 thereon. The second weight disk 1013 is provided with weight disk mounting bolt holes 10132 for connecting with the weight disk positioning disk 102 through mounting bolts.
Referring to fig. 4 and 5, the weight plate puck 102 has a first puck side 1021 and a second puck side 1023. Wherein the first puck side 1021 is disposed opposite the second puck side 1023, specifically, the first puck side 1021 is disposed adjacent the second counterweight puck side 1015. The counterweight plate positioning plate 102 is provided with bolt holes matched with the counterweight plate mounting bolt holes 10132, and is used for being connected with the counterweight plate 101.
Referring to fig. 3, the first positioning plate side surface 1021 extends into the first positioning spigot portion 1016 on the second counterweight plate side surface 1015, so that the positioning accuracy is improved, the coaxiality of a shaft system is improved, the vibration of a water pump motor is reduced, and the stability of the whole system is improved by arranging the positioning spigot structure.
The utility model discloses in other a specific embodiment, also can set up first location ending part on first positioning disk side 1021, make second counterweight disk side 1015 extend into first location ending part to improve positioning accuracy, improve the axiality of shafting, reduce the vibration of water pump motor, improve entire system's stability.
In a specific embodiment, referring again to fig. 5, the first positioning disk side 1021 is further provided with a mounting groove 1022 corresponding to the third through hole 10121, a first mounting hole 10221 is provided in the mounting groove 1022, and the weight disk positioning disk 102 is connected to the vertical pump set motor through the first mounting hole 10221 by a threaded connection such as a connecting bolt.
In addition, as shown in fig. 5, a second positioning stop part 1024 is provided on the second disk side 1023, and the vertical pump set motor extends into the second positioning stop part to position the counterweight disk positioning disk 102, so as to further improve the coaxiality and the vibration stability.
To sum up, the embodiment of the utility model provides a through set up first location ending part between counterweight plate and counterweight positioning disk, promote the positioning accuracy of vertical pump group counter weight structure for motor system for vertical pump group motor system reaches the dynamic balance of high accuracy. In addition, through set up specific multiunit hookup hole on the weight plate for at the in-process of realizing entire system's dynamic balance, can realize fast, conveniently that the counter weight add, get rid of better, easily operation, simple structure has made things convenient for the online dynamic balance's of high accuracy quick counter weight location simultaneously, and the down time when having practiced thrift equipment maintenance also can further promote entire system's level and smooth precision. Through set up second location tang portion between counter weight positioning disk and vertical pump package motor, further promoted the positioning accuracy of counter weight structure for condensate pump motor system reaches the dynamic balance of high accuracy. In addition, the counterweight structure for the vertical pump unit motor system of the embodiment of the utility model also facilitates the delivery vibration test of the vertical pump unit motor and saves the downtime during equipment maintenance; the design of two circles of weight holes with different specifications on the weight plate provides multiple choices for the specification of the weight bolt during weight balancing, reduces the precision requirement on the total mass of the weight plate, and simultaneously reduces the processing precision requirements of the weight plate and the weight plate positioning plate; the positioning spigot structures arranged on the counterweight plate and the counterweight plate positioning plate can solve the problems of large vibration and unstable vibration of a motor of the vertical pump set, so that the vibration of the motor can stably operate within a standard qualified value range for a long time, the overhaul period and the service life of the pump set are prolonged, the safe and stable operation of the unit is ensured as far as possible, the operation and maintenance cost is reduced, and the benefit is improved.
[ second embodiment ]
As shown in fig. 6, a vertical pump unit motor system according to a second embodiment of the present invention includes a counterweight structure 10 for a vertical pump unit motor system and a vertical pump unit motor 20. The counterweight structure 10 for the vertical pump unit motor system can adopt the counterweight structure for the vertical pump unit motor system in the first embodiment, and the detailed structure is not described herein. The vertical pump unit motor 20 can be, for example, a mature vertical pump unit motor in the prior art and a motor with similar functions. Specifically, the counterweight structure 10 for the vertical pump unit motor system is connected with the vertical pump unit motor 20 through a second positioning stop part 1024 arranged on the second positioning disk side 1023.
More specifically, as shown in fig. 6, the vertical pump group motor 20 further includes a fan 201, a rotor shaft 202, a stator 203, a rotor 204, and a motor base 205. The motor base 205 is a support frame for the vertical pump unit motor 20 and provides a support and mounting position for other components. Stator 203 is disposed within motor mount 205. The rotor 204 is disposed within the stator 203, and is rotatable relative to the stator 203. The rotor shaft 202 is disposed within the rotor 203 and includes oppositely disposed first and second ends 2021, 2022. The first end 2021 extends to the outside of the motor base and is connected to the second puck side 1023, and the second end 2022 is used for connecting a pump shaft. The fan 201 is sleeved on the rotor shaft 202 and is located between the motor base 20 and the counterweight structure 10 for the vertical pump set motor system.
The embodiment of the utility model provides a concrete structure and the function description of vertical pump package motor system can refer to the description of the counter weight structure for vertical pump package motor system in aforementioned first embodiment, and this point is no longer repeated.
In addition, it should be understood that the foregoing embodiments are merely exemplary of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structures, and not departing from the purpose of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and the actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
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 technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a vertical pump package is counter weight structure for motor system which characterized in that includes:
the counterweight disc comprises a first counterweight disc, a second counterweight disc and a disc connecting piece; the first counterweight disk and the second counterweight disk are oppositely arranged, and the disk connecting piece is connected between the first counterweight disk and the second counterweight disk; a counterweight hanging part for hanging a counterweight is arranged on the side surface of the first counterweight disc, which is far away from the second counterweight disc, of the first counterweight disc; the counterweight hooking part comprises a plurality of groups of hooking holes, and a plurality of hooking holes in each group of hooking holes are symmetrically arranged by taking the circle center of the side surface of the first counterweight disc on the first counterweight disc as the center; the side surface of the second counterweight plate, which is far away from the first counterweight plate, on the second counterweight plate is opposite to the side surface of the first counterweight plate; the counterweight disc is provided with an axial through hole which penetrates through the first counterweight disc, the second counterweight disc and the disc connecting piece; and
The counterweight plate positioning plate is connected with the counterweight plate and comprises a first positioning plate side surface and a second positioning plate side surface which are oppositely arranged; the side surface of the first positioning disc is adjacent to the side surface of the second counterweight disc, a first positioning stop port part is arranged on the side surface of the second counterweight disc, and the side surface of the first positioning disc extends into the first positioning stop port part; a second positioning stop port part is arranged on the side surface of the second positioning disc and used for positioning the counterweight disc positioning disc on the vertical pump set motor; the side surface of the first positioning disc is provided with an installation groove corresponding to the axial through hole, a plurality of first installation holes are formed in the installation groove, and the counterweight disc positioning disc penetrates through a plurality of connecting pieces and is connected to the vertical pump set motor through the first installation holes.
2. The utility model provides a vertical pump package is counter weight structure for motor system which characterized in that includes:
the counterweight plate comprises a first counterweight plate side surface and a second counterweight plate side surface which are oppositely arranged, wherein a counterweight hanging part for hanging a counterweight is arranged on the first counterweight plate side surface; and
the counterweight plate positioning plate is connected with the counterweight plate and comprises a first positioning plate side surface and a second positioning plate side surface which are oppositely arranged;
Wherein the second weight plate side surface is adjacent to the first positioning plate side surface, and the second weight plate and the first positioning plate side surface are positioned through a first positioning spigot portion; and the side surface of the second positioning plate is used for connecting a vertical pump set motor.
3. The counterweight structure for vertical pump group motor system of claim 2, wherein said first locating spigot is disposed on a side of said first locating plate, and said second counterweight plate side extends into said first locating spigot.
4. The counterweight structure for vertical pump group motor system of claim 2, wherein said first locating spigot is provided on a side of said second counterweight plate, said first locating plate side extending into said first locating spigot.
5. The counterweight structure for vertical pump group motor system as claimed in claim 2, wherein the first counterweight plate is circular in side; the counterweight hooking part comprises a plurality of groups of hooking holes, a plurality of hooking holes in each group of hooking holes are symmetrically arranged by taking the circle center of the side surface of the first counterweight disk as the center, the circles of any two groups of hooking holes in the axial direction of the center are concentric circles, and the circle centers of the concentric circles are coincided with the circle center of the side surface of the first counterweight disk.
6. The counterweight structure for a vertical pump stack motor system of claim 2, wherein the counterweight plate comprises a first counterweight plate, a second counterweight plate, and a plate connector, wherein the first counterweight plate and the second counterweight plate are disposed opposite to each other, and the plate connector is connected between the first counterweight plate and the second counterweight plate, the first counterweight plate side is a side of the first counterweight plate that is away from the second counterweight plate, and the second counterweight plate side is a side of the second counterweight plate that is away from the first counterweight plate.
7. The balance weight structure for the motor system of the vertical pump group according to claim 6, wherein the first balance weight disc is provided with a first through hole, the second balance weight disc is provided with a second through hole, the disc connecting piece is provided with a third through hole, and two ends of the disc connecting piece respectively extend into the first through hole and the second through hole; and an installation groove corresponding to the third through hole is formed in the side surface of the first positioning disc, a first installation hole is formed in the installation groove, and the counterweight disc positioning disc penetrates through a threaded connecting piece and is connected to the vertical pump set motor through the first installation hole.
8. The counterweight structure for vertical pump group motor system as claimed in claim 2, wherein a second positioning port part is provided on the side surface of the second positioning plate, and the vertical pump group motor extends into the second positioning port part to position the counterweight plate positioning plate.
9. A vertical pump package motor system, characterized by, includes:
a vertical pump set motor; and
the counterweight structure for vertical pump group motor system as claimed in any one of claims 1 to 8, which is laterally positioned by the second positioning plate and connected to the vertical pump group motor.
10. The vertical pump stack motor system of claim 9, comprising:
a motor base;
the stator is arranged in the motor base;
a rotor disposed within the stator;
the rotor shaft is arranged in the rotor and comprises a first end and a second end, and the first end extends out of the motor base and is connected to the side surface of the second positioning disk; and
and the fan is sleeved on the rotor shaft and is positioned between the motor base and the counterweight structure for the vertical pump set motor system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371830.0U CN214674735U (en) | 2021-02-08 | 2021-02-08 | Counterweight structure for vertical pump unit motor system and vertical pump unit motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371830.0U CN214674735U (en) | 2021-02-08 | 2021-02-08 | Counterweight structure for vertical pump unit motor system and vertical pump unit motor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214674735U true CN214674735U (en) | 2021-11-09 |
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ID=78447811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120371830.0U Active CN214674735U (en) | 2021-02-08 | 2021-02-08 | Counterweight structure for vertical pump unit motor system and vertical pump unit motor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214674735U (en) |
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2021
- 2021-02-08 CN CN202120371830.0U patent/CN214674735U/en active Active
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