CN212003623U - Noise-reduction shielding pump - Google Patents
Noise-reduction shielding pump Download PDFInfo
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- CN212003623U CN212003623U CN202020226338.XU CN202020226338U CN212003623U CN 212003623 U CN212003623 U CN 212003623U CN 202020226338 U CN202020226338 U CN 202020226338U CN 212003623 U CN212003623 U CN 212003623U
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Abstract
The utility model belongs to the technical field of pump devices, and discloses a noise reduction canned motor pump, which comprises a pump body, an impeller, a front bearing seat, a rear bearing seat, a stator assembly, and a rotor dynamic balance assembly which is combined with the impeller and passes dynamic balance test; the rotor dynamic balance assembly comprises a rotating shaft, a rotor assembly, a front bearing and a rear bearing; the front bearing and the rear bearing are respectively sleeved at the front end and the rear end of the rotating shaft and are used for supporting the rotating shaft to rotate stably; the front bearing seat and the rear bearing seat are respectively used for bearing a front bearing and a rear bearing; the front bearing seat, the rear bearing seat, the front bearing and the rear bearing are all of split type structures. The utility model discloses with the split type manufacturing of bearing frame and bearing, installation and dismouting, the rotor subassembly can be unnecessary dismouting impeller after accomplishing the dynamic balance test, directly adorns in the canned motor pump, keeps best dynamic balance state, also can be through assembling split type bearing frame, split type bearing and rotor subassembly together, accomplishes complete machine dynamic balance, realizes best dynamic balance state.
Description
Technical Field
The utility model belongs to the technical field of pump class device, in particular to shield pump of making an uproar falls.
Background
The shield pump is used as a special pump body, can realize complete leakage-free due to a static sealing structure, and is commonly used for conveying flammable and explosive petrochemical engineering liquid or highly toxic petrochemical engineering liquid. Vibration and noise reduction of the canned motor pump is one of the key obstacles for further application in special fields. The low-frequency vibration reduction technology is the most core technology in the vibration reduction and noise reduction technology of the shield pump, wherein the rotation frequency of the shield pump is a main factor mainly influencing the low-frequency vibration of the shield pump and is also the bottleneck difficulty of the low-frequency vibration reduction. In this in-process, because axle sleeve and bush in the rotor subassembly lean on the impeller extrusion to fix on the rotor, the secondary dismouting of impeller, lead to axle sleeve and bush radially to have the design clearance, the design clearance is used for offsetting the expend with heat and contract with cold of axle, when axle sleeve and bush axial position are not retrained, axle sleeve and bush lead to radial clearance drunkenness because of the installation reason, there is certain random unbalance amount around the reinstallation, cause the rotor dynamic balance after the reinstallation to fail to guarantee the uniformity, more can't guarantee the dynamic balance precision of rotor subassembly, and then can't reduce the noise that canned motor pump shaft frequency vibrates and produce.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a shield pump of making an uproar falls has solved the technical problem of the noise of current shield pump shaft frequency vibration and output.
The utility model provides a technical scheme as follows:
an object of the utility model is to provide: a noise reduction canned motor pump comprises a pump body, an impeller, a front bearing seat, a rear bearing seat, a stator assembly and a rotor dynamic balance assembly, wherein the rotor dynamic balance assembly passes a dynamic balance test and is assembled with the impeller; the rotor dynamic balance assembly comprises a rotating shaft, a rotor assembly, a front bearing and a rear bearing; the front bearing and the rear bearing are respectively sleeved at the front end and the rear end of the rotating shaft and are used for supporting the rotating shaft to rotate stably; the front bearing seat and the rear bearing seat are respectively used for bearing a front bearing and a rear bearing; the front bearing seat, the rear bearing seat, the front bearing and the rear bearing are all of split type structures.
Preferably, the front bearing and the rear bearing are both of seamless buckled two-piece type structures; the front bearing comprises a first bearing sheet and a second bearing sheet which are centrosymmetric; the rear bearing comprises a third bearing sheet and a fourth bearing sheet which are centrosymmetric.
Preferably, the rotor assembly outer ring is provided with a rotor shielding sleeve; the inner ring of the stator component is provided with a stator shielding sleeve; the rotor shielding sleeve and the stator shielding sleeve are both manufactured by a spinning forming process.
Preferably, a propelling disc is further arranged on the rotating shaft.
Preferably, the front bearing and the rear bearing respectively comprise a bush and a shaft sleeve which are in sliding fit; the bushing is in interference fit with the inner ring of the bearing seat; the shaft sleeve is tightly sleeved on the outer side of the rotating shaft; the shaft sleeve and the bushing are mounted by adopting a key-aligning mounting structure.
Preferably, the rotor shielding sleeve and the stator shielding sleeve are made of non-magnetic corrosion-resistant materials.
Preferably, the canned motor pump is further provided with a TRG detector.
The utility model discloses an installation method of shield pump of making an uproar falls is:
s1, after the impeller and the rotor dynamic balance assembly are installed in a matched mode, dynamic balance testing is conducted and the impeller and the rotor dynamic balance assembly are debugged to meet dynamic balance testing standards;
s2, the split front bearing on the rotor dynamic balance assembly is taken down, the split front bearing seat on the shield pump is disassembled, the remaining rotor dynamic balance assembly is installed in the installation cavity of the shield pump, and the front bearing seat are fixedly installed according to installation requirements.
Preferably, the dynamic balance test is completed on a high-precision dynamic balance machine.
The utility model discloses can bring following at least one beneficial effect:
the rotor dynamic balance of the shield pump is realized by assembling rotating parts such as an impeller, a shaft sleeve, a bushing, a fixing bolt, a rotating shaft and the like together, completing the rotor dynamic balance on a dynamic balancing machine, generally requiring G1 for the rotor component dynamic balance, actually on a high-precision dynamic balancing machine, the dynamic balance precision of a rotor component can be higher, but due to the restriction of the structure of the shield pump, the rotor component completing the dynamic balance needs to be assembled in the shield pump by disassembling the impeller, assembling other rotor components in the shield pump, then installing a bearing seat and a bearing in the shield pump, and finally fixing the impeller on the rotor component. Because the axle sleeve and the bush in the rotor subassembly lean on the impeller extrusion to fix on the rotor, the secondary dismouting of impeller, lead to axle sleeve and bush axial position on the rotor not to be retrained, and because axle sleeve and bush radially have the design clearance, the design clearance is used for offsetting the expend with heat and contract with cold of axle, when axle sleeve and bush axial position are not retrained, axle sleeve and bush lead to radial clearance drunkenness because of the installation reason, there is certain random unbalance amount before and after the reinstallation, cause the rotor dynamic balance after the reinstallation to fail to guarantee the uniformity, more can't guarantee that the rotor subassembly can realize the dynamic balance precision below G1, and then can't reduce canned pump shaft frequency vibration.
The rotor assembly of the conventional canned motor pump is not enough in dynamic balance design, the components such as the thrust disc of the rotor of the conventional canned motor pump, an impeller and a bushing are connected by a single key, the initial rotor has larger unbalance amount due to the asymmetric design, in the dynamic balance debugging process, the dynamic balance of the rotor is realized by local adjustment of the rotor assembly, but the local weight increase and weight reduction can cause local circumferential flow to be uneven, certain radial unbalance force can be generated in the running of the actual pump due to the uneven flow, the rotor assembly can be interfered by external force in the actual running process to further generate the unbalance amount, and the frequency of the canned motor pump is directly influenced.
The special structure of the canned motor pump is that the motor is isolated from the fluid by the canned motor, and the conventional canned motor is manufactured by a rolling and pressing welding mode, which has several defects:
(1) the shielding sleeve manufactured by the rolling and pressing and welding mode cannot guarantee a cylinder with high structural coaxiality, after welding, the shielding sleeve can generate local deformation and can directly influence the efficiency and the service life of a pump, and even if the shielding pump produced in the same batch is different in deformation and deformation position, the service life is also different.
(2) The rotor of the shield pump is wholly immersed in a medium in the operation state and is influenced by the deformation of the shield sleeve, and the rotor is disturbed by certain pressure in the actual operation process, so that the unbalance in the operation process is increased, and the shaft frequency vibration is increased.
Along with the improvement of the low-vibration design level of the canned motor pump and the high requirement of customers on the low-vibration performance, the low-frequency-band shaft frequency is reduced at home and abroad at present, the improvement of the main structure of the canned motor pump is needed to ensure that the design level of the water pump impeller and the requirement of customers are improved, the manufacturing process of the water pump impeller is higher and higher, the requirement of the low-vibration designed water pump impeller on the internal details of the impeller is very high, the requirement on the smoothness degree of the inner surface and the outer surface of a flow passage is very high, therefore, the manufacturing process meets the design requirement, the advantage of the low-vibration design can be completely reflected, the low-vibration impeller blade is usually greatly distorted in space, and the conventional machining. Therefore, a new manufacturing process of the closed impeller of the low-vibration water pump needs to be developed, the structure of the metal impeller can be kept consistent with the designed structure, the strength and the reliability of the welding line of the impeller can be guaranteed, and the process can meet the use requirements of the performance and the reliability of the water pump.
The utility model discloses in through low frequency conversion canned motor pump structure and technology guarantee, realize canned motor pump low frequency vibration bottleneck and break through.
a) The front bearing seat and the front bearing are made into a split structure, and positioning and assembling are realized through the positioning pin;
b) the mounting process of the shield pump rotor assembly after completing dynamic balance is changed from the original process of firstly dismounting the impeller, then mounting the rotor, then mounting the front bearing seat and finally mounting the impeller, wherein firstly, the split bearing seat and the bearing are mounted on the rotor assembly to form a whole, and then the whole is mounted in the shield pump;
c) in the manufacturing process of a stator and a rotor of the canned motor pump, the stator canned cover and the rotor canned cover are manufactured by adopting a spinning process, the cylindrical canned cover is directly manufactured, and the concentricity and the roundness of the canned cover can be ensured;
d) the rotor shaft sleeve and the bearing are connected by a symmetrical key instead of the original single-key connection, and the symmetrical performance of the rotor is realized in design.
Through the utility model provides a canned motor pump and realization technology can bring following at least one beneficial effect:
a) the low-frequency vibration reduction of the shield pump is guaranteed structurally and technically, the bottleneck of low-frequency vibration can be further broken through, and the low-frequency vibration of the shield pump is further reduced;
b) the low-frequency-conversion structure and the installation process of the canned motor pump can control the low-frequency vibration of the canned motor pump and directly reduce the vibration at the positions of 25Hz, 50Hz and 100 Hz;
c) the rotor, the bearing seat and the bearing are mounted together to complete the dynamic balance of the whole machine, so that the dynamic balance performance of the rotor can reach the best;
d) the shielding sleeve is integrally manufactured by spinning, so that the welding link is reduced, and the reliability of the shielding sleeve is ensured;
e) the shielding sleeve is manufactured by integral spinning, so that the inner surface of the shielding sleeve can be ensured to be smooth and have the same roundness, the fluid abrasion degree is reduced, and the reliability of the shielding pump is improved;
f) the bearing seat and the bearing are installed in a split mode, repeated assembly and disassembly after the rotor assembly is in dynamic balance are avoided, the installation process is simplified, and the assembly and disassembly time is saved;
g) the bearing seat and the bearing are installed in a split mode, so that a test space is provided for arranging vibration detection points for vibration tests of the bearing seat and the bearing, and the testability of the canned motor pump is improved;
h) the bearing seat and the bearing are installed in a split mode, so that the workload of maintenance and disassembly and inspection of the canned motor pump is simplified, and the maintainability of the canned motor pump is improved;
i) the shaft sleeve and the bushing are installed by adopting symmetric keys, so that the symmetry and the reliability of the rotor assembly are improved.
In summary, the bearing seat and the bearing are manufactured, installed and disassembled in a split manner, the rotor assembly can be directly installed in the shield pump without disassembling the impeller after completing the dynamic balance, the optimal dynamic balance state is maintained, and the split type bearing seat, the split type bearing and the rotor assembly can be assembled together to complete the dynamic balance of the whole machine and realize the optimal dynamic balance state. The shielding sleeve is manufactured through a spinning structure, the shielding sleeve manufactured through rolling and welding is replaced, the defects that the shielding sleeve manufactured through rolling and welding is poor in weld joint reliability, the shielding sleeve deforms after welding and the like are overcome, the process can greatly improve the operation environment of the rotor of the shielding pump, reduce the operation disturbance of the rotor, and improve the low-frequency rotation of the shielding pump.
Drawings
The above features, technical features, advantages and modes of realisation of a noise reducing canned motor pump will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.
Fig. 1 is a schematic structural view of a noise reduction shielding pump of the present invention;
FIG. 2 is a schematic structural view of a split bushing;
FIG. 3 is a schematic structural diagram of a split bearing seat;
fig. 4 is a schematic view of a stator can made by a spin forming process.
Description of the reference numerals
1-a pump body; 2-an impeller; 3-front bearing seat; 4-rear bearing seat; 5-a stator assembly; 61-a rotating shaft; 62-a rotor assembly; 63-a front bearing; 64-rear bearing.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
Example 1
As shown in fig. 1, 2 and 3, a noise reduction canned motor pump comprises a pump body 1, an impeller 2, a front bearing seat 3, a rear bearing seat 4, a stator assembly 5, and a rotor dynamic balance assembly which passes a dynamic balance test and is assembled with the impeller; the rotor dynamic balance assembly comprises a rotating shaft 61, a rotor assembly 62, a front bearing 63 and a rear bearing 64; the front bearing 63 and the rear bearing 64 are respectively sleeved at the front end and the rear end of the rotating shaft 61 and used for supporting the rotating shaft 61 to rotate stably; the front bearing seat 3 and the rear bearing seat 4 are respectively used for bearing the front bearing 63 and the rear bearing 64; the front bearing seat 3, the rear bearing seat 4, the front bearing 63 and the rear bearing 64 are all of split type structures.
In one embodiment, as shown in fig. 2, the front bearing 63 and the rear bearing 64 are both of a seamless snap-fit two-piece construction; the front bearing 63 comprises a first bearing sheet and a second bearing sheet which are centrosymmetric; the rear bearing 64 includes a third bearing piece and a fourth bearing piece which are centrosymmetric.
In one embodiment, as shown in fig. 4, the rotor shield is provided around the rotor assembly 62; the inner ring of the stator component 5 is provided with a stator shielding sleeve; the rotor shielding sleeve and the stator shielding sleeve are both manufactured by a spinning forming process.
In one embodiment, the shaft 61 is further provided with a propulsion disc.
In one embodiment, the front bearing 63 and the rear bearing 64 each comprise a sliding fit bushing and sleeve; the bushing is in interference fit with the inner ring of the bearing seat; the shaft sleeve is tightly sleeved on the outer side of the rotating shaft; the shaft sleeve and the bushing are mounted by adopting a key-aligning mounting structure.
In one embodiment, the rotor shielding sleeve and the stator shielding sleeve are made of non-magnetic corrosion-resistant materials.
In one embodiment, the canned motor pump is further provided with a TRG detector.
Example 2
The utility model discloses an installation method of shield pump of making an uproar falls is:
s1, after the impeller 2 and the rotor dynamic balance assembly are installed in a matched mode, dynamic balance testing is conducted and debugged to meet dynamic balance testing standards;
s2, the split front bearing 63 on the rotor dynamic balance assembly is taken down, the split front bearing seat 3 on the shield pump is disassembled, the remaining rotor dynamic balance assembly is installed in the installation cavity of the shield pump, and the front bearing 63 and the front bearing seat 3 are fixedly installed according to installation requirements.
In one embodiment, the dynamic balance test is completed on a high-precision dynamic balance machine.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a shield pump of making an uproar falls, includes the pump body, impeller, front axle bearing, rear axle bearing and stator module, its characterized in that: the rotor dynamic balance assembly is assembled with the impeller and passes dynamic balance test; the rotor dynamic balance assembly comprises a rotating shaft, a rotor assembly, a front bearing and a rear bearing; the front bearing and the rear bearing are respectively sleeved at the front end and the rear end of the rotating shaft and are used for supporting the rotating shaft to rotate stably; the front bearing seat and the rear bearing seat are respectively used for bearing a front bearing and a rear bearing; the front bearing seat, the rear bearing seat, the front bearing and the rear bearing are all of split type structures.
2. The noise reducing canned motor pump of claim 1, wherein: the front bearing and the rear bearing are both of seamless buckled two-piece type structures; the front bearing comprises a first bearing sheet and a second bearing sheet which are centrosymmetric; the rear bearing comprises a third bearing sheet and a fourth bearing sheet which are centrosymmetric.
3. The noise reducing canned motor pump of claim 1, wherein: a rotor shielding sleeve is arranged on the outer ring of the rotor component; the inner ring of the stator component is provided with a stator shielding sleeve; the rotor shielding sleeve and the stator shielding sleeve are both manufactured by a spinning forming process.
4. The noise reducing canned motor pump of claim 1, wherein: and a propelling disc is also arranged on the rotating shaft.
5. The noise reducing canned motor pump of claim 1, wherein: the front bearing and the rear bearing respectively comprise a bush and a shaft sleeve which are in sliding fit; the bushing is in interference fit with the inner ring of the bearing seat; the shaft sleeve is tightly sleeved on the outer side of the rotating shaft; the shaft sleeve and the bushing are mounted by adopting a key-aligning mounting structure.
6. The noise reducing canned motor pump of claim 3, wherein: the rotor shielding sleeve and the stator shielding sleeve are made of non-magnetic corrosion-resistant materials.
7. The noise reducing canned motor pump of claim 1, wherein: the canned motor pump is also provided with a TRG detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226338.XU CN212003623U (en) | 2020-02-28 | 2020-02-28 | Noise-reduction shielding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226338.XU CN212003623U (en) | 2020-02-28 | 2020-02-28 | Noise-reduction shielding pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212003623U true CN212003623U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020226338.XU Active CN212003623U (en) | 2020-02-28 | 2020-02-28 | Noise-reduction shielding pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212003623U (en) |
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2020
- 2020-02-28 CN CN202020226338.XU patent/CN212003623U/en active Active
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