CN215409249U - Centrifugal chemical process pump of no leakage magnetic drive - Google Patents
Centrifugal chemical process pump of no leakage magnetic drive Download PDFInfo
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- CN215409249U CN215409249U CN202121378869.1U CN202121378869U CN215409249U CN 215409249 U CN215409249 U CN 215409249U CN 202121378869 U CN202121378869 U CN 202121378869U CN 215409249 U CN215409249 U CN 215409249U
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Abstract
The utility model discloses a leakage-free magnetic force driven centrifugal chemical process pump, and relates to the technical field of chemical process pumps. The technical key points are as follows: including the pump body and pump shaft, the pump shaft rotates to be connected in the pump body, and pump body both ends are fixedly connected with pump cover, motor casing respectively, and the pump shaft both ends are connected with impeller and rotor respectively, and the pump body is close to rotor one side fixedly connected with spacer sleeve, the inside fixedly connected with stator of motor casing, and the stator includes a plurality of electrical coil, leaves the clearance between stator and the spacer sleeve, and the rotor evenly inlays all around including turning, turns and is equipped with a plurality of permanent magnets. The utility model has the advantages that the motor shaft and the pump shaft are the same shaft, the step of accurately centering the transmission shaft and the motor shaft is omitted, the requirement on experience of installation personnel is very low, and meanwhile, the later-stage disassembly and maintenance are convenient.
Description
Technical Field
The utility model relates to the technical field of chemical process pumps, in particular to a leakage-free magnetic drive centrifugal chemical process pump.
Background
The chemical process pump belongs to a high-end product in pump classes, is different from a conventional chemical pump, and has strict requirements on the sealing property, reliability and environmental protection of the pump because the petrochemical industry is a more dangerous industry, while the ZA/ZE series pumps produced in China are mechanically and dynamically sealed, are easy to leak and do not meet the performance requirements of petrochemical processes. The magnetic pump is a static seal leakage-free pump, according to the working principle of a permanent magnet coupler, a motor drives an outer magnetic rotor, the outer magnetic rotor drives an inner magnetic rotor and an impeller to synchronously rotate under the action of a magnetic field, a static seal isolation sleeve is arranged between the inner rotor and the outer rotor, torque is transmitted in a non-contact manner by utilizing the magnetic field, and medium full-seal state conveying is effectively realized.
The magnetic transmission petrochemical process pump disclosed in the existing Chinese patent with the publication number of CN201162705Y comprises a pump body, a pump cover and a pump shaft, wherein a supporting sliding bearing is arranged on the pump shaft, two ends of the pump shaft are respectively connected with an impeller and an inner magnetic rotor, the corresponding outer magnetic rotor is connected with a transmission shaft, the other end of the transmission shaft is in transmission connection with a matched motor, a sealing separation sleeve is further arranged between the inner magnetic rotor and the outer magnetic rotor, an annular convex rib is arranged on a rear cover plate of the impeller, the annular convex rib and a concave cavity on the pump cover are in clearance fit to form a balance cavity close to a closed state, and a balance hole for communicating an inner cavity of the impeller and the balance cavity is arranged at the rear cover plate of the impeller to form an axial force balance adjusting mechanism. The utility model has reasonable structure, realizes the transmission of medium full-sealing zero leakage by utilizing the magnetic field to transmit torque without contact, and automatically balances the axial force acting on the rear cover plate of the impeller according to the working condition change by utilizing the balance cavity and the balance hole when the pump works, thereby greatly improving the service life and the reliability of the pump.
The above prior art solution has the following drawbacks: the transmission shaft and supporting motor need accurate centering when being connected, have great requirement to installer's technique, are unfavorable for the installation of earlier stage and the maintenance of later stage.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a leakage-free magnetic force driven centrifugal chemical process pump which has the advantages that a motor shaft and a pump shaft are both a shaft, the step of accurately centering a transmission shaft and the motor shaft is omitted, the requirement on experience of an installer is very low, and meanwhile, later-stage disassembly and maintenance are facilitated.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a centrifugal chemical industry process pump of no leakage magnetic drive, includes the pump body and pump shaft, the pump shaft rotate connect in the pump body, pump body both ends fixedly connected with pump cover, motor casing respectively, the pump shaft both ends are connected with impeller and rotor respectively, the pump body is close to rotor one side fixedly connected with separation sleeve, the inside fixedly connected with stator of motor casing, the stator includes a plurality of electrical coil, the stator with leave the clearance between the separation sleeve, the rotor is including turning, it evenly inlays all around and is equipped with a plurality of permanent magnets to turn.
Through adopting above-mentioned technical scheme, change the drive mode of current magnetic drive pump, regard as the stator of this device with the circular telegram coil, the rotor that direct drive comprises the permanent magnet replaces motor shaft, pump shaft and the three axle of transmission shaft of original magnetic drive pump with a pump shaft, has saved this one step of accurate centering of transmission shaft and motor shaft, and it is very low to installer's experience requirement, the later stage dismouting maintenance of being convenient for simultaneously.
The present invention in a preferred example may be further configured to: the rotator is made of high-strength engineering plastics, and a polyether-ether-ketone coating is brushed on the surface of the permanent magnet.
By adopting the technical scheme, the polyether-ether-ketone coating has good wear resistance and corrosion resistance, the protection function of the permanent magnet can be increased by brushing the surface of the permanent magnet, the corrosion speed of the rotor by liquid in the pump body is reduced, and the service life of the rotor is prolonged.
The present invention in a preferred example may be further configured to: and a cooling channel is formed in the pump body and communicates a cavity formed by the rotor and the isolation sleeve with a cavity formed between the pump body and the pump cover.
Through adopting above-mentioned technical scheme, regard the liquid of carrying in the pump body as the emollient and the coolant liquid of rotor, effectively increased the life of this device.
The present invention in a preferred example may be further configured to: the isolation sleeve is provided with a first sealing structure at the joint of the pump body, and the motor shell is provided with a second sealing structure at the joint of the pump body.
By adopting the technical scheme, the device has a double-layer sealing structure, the risk of liquid leakage in the pump body is reduced, and the safety of the device is further improved.
The present invention in a preferred example may be further configured to: the isolation sleeve is made of high-strength engineering plastics.
By adopting the technical scheme, the problem that the permanent magnet is demagnetized due to the fact that eddy currents are generated in the isolating sleeve when the stainless steel is used as the isolating sleeve is solved, and meanwhile, the high-strength engineering plastics cannot generate eddy currents in a changing magnetic field, so that the operating temperature of the pump body is reduced, and the service life of the device is prolonged.
In summary, the utility model includes at least one of the following beneficial technical effects:
1. by adopting the technical scheme, the driving mode of the existing magnetic pump is changed, the electrified coil is used as the stator of the device, the rotor formed by the permanent magnet is directly driven, and the original three shafts of the motor shaft, the pump shaft and the transmission shaft of the magnetic pump are replaced by one pump shaft, so that the step of accurately centering the transmission shaft and the motor shaft is omitted, the experience requirement on installation personnel is very low, and meanwhile, later-stage disassembly and maintenance are facilitated;
2. by adopting the technical scheme, the protection of the permanent magnet is increased, the corrosion speed of the rotor by liquid in the pump body is reduced, and the service life of the rotor is prolonged;
3. by adopting the technical scheme, the problem that the permanent magnet is demagnetized due to the fact that eddy currents are generated in the isolating sleeve when the stainless steel is used as the isolating sleeve is solved, and meanwhile, the high-strength engineering plastics cannot generate eddy currents in a changing magnetic field, so that the operating temperature of the pump body is reduced, and the service life of the device is prolonged.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a second perspective view of fig. 1.
Reference numerals: 1. a pump body; 2. a pump shaft; 3. a pump cover; 4. a motor housing; 5. an impeller; 6. a rotor; 61. a swivel; 62. A permanent magnet; 7. an isolation sleeve; 8. a stator; 81. an electrified coil; 9. a first seal structure; 10. a second seal structure; 11. a cooling channel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the leakage-free magnetically-driven centrifugal chemical process pump disclosed by the utility model comprises a pump body 1 and a pump shaft 2, wherein the pump shaft 2 is rotatably connected to the pump body 1, two ends of the pump body 1 are respectively and fixedly connected with a pump cover 3 and a motor shell 4, two ends of the pump shaft 2 are respectively connected with an impeller 5 and a rotor 6, one side of the pump body 1 close to the rotor 6 is fixedly connected with an isolation sleeve 7, a stator 8 is fixedly connected inside the motor shell 4, the stator 8 comprises a plurality of electrified coils 81, a gap is reserved between the stator 8 and the isolation sleeve 7, the rotor 6 comprises a rotor body 61, and a plurality of permanent magnets 62 are uniformly embedded around the rotor body 61. This device has changed the drive mode of current magnetic drive pump, regards as the stator 8 of this device with circular telegram coil 81, and direct drive is by the rotor 6 that permanent magnet 62 constitutes, replaces motor shaft, pump shaft 2 and the three axle of transmission shaft of original magnetic drive pump with a pump shaft 2, has saved this one step of accurate centering of transmission shaft and motor shaft, and the experience requirement to installer is very low, the later stage dismouting maintenance of being convenient for simultaneously.
As shown in fig. 1 and 2, the rotator 61 is made of high-strength engineering plastic, and a peek coating is applied to the surface of the permanent magnet 62. The polyetheretherketone coating has good wear resistance and corrosion resistance, the protection function of the permanent magnet 62 can be increased by brushing the polyetheretherketone coating on the surface of the permanent magnet 62, the corrosion speed of the rotor 6 by liquid in the pump body 1 is reduced, and the service life of the rotor 6 is prolonged.
As shown in fig. 1 and 2, a cooling channel 11 is formed inside the pump body 1, and the cooling channel 11 communicates a cavity formed by the rotor 6 and the spacer 7 with a cavity formed between the pump body 1 and the pump cover 3. The cooling channel 11 takes the liquid conveyed in the pump body 1 as the lubricant and the cooling liquid of the rotor 6, thereby effectively prolonging the service life of the device.
As shown in fig. 1 and 2, a first sealing structure 9 is arranged at the joint of the isolation sleeve 7 and the pump body 1, and a second sealing structure 10 is arranged at the joint of the motor casing 4 and the pump body 1. The first sealing structure 9 and the second sealing structure 10 can be sealing rings, so that the device has a double-layer sealing structure, the risk of liquid leakage in the pump body 1 is reduced, and the safety of the device is further improved.
As shown in fig. 1 and 2, the high-strength engineering plastic is used as the isolation sleeve 7, so that the problem that the permanent magnet 62 is demagnetized due to eddy current generated in the isolation sleeve 7 when stainless steel is used as the isolation sleeve 7 is solved, and meanwhile, the high-strength engineering plastic does not generate eddy current in a changing magnetic field, so that the operation temperature of the pump body 1 is reduced, the service life of the device is prolonged, and the high-strength engineering plastic in the embodiment can be polyether ether ketone resin.
The implementation principle of the embodiment is as follows: before the utility model is used, firstly the pump shaft 2 and the rotor 6 are installed on the pump body 1, secondly the impeller 5 is installed at one end of the pump shaft 2 far away from the rotor 6, secondly the isolation sleeve 7 is installed on the pump body 1, secondly the stator 8 is installed on the motor casing 4, thirdly the motor casing 4 is installed on the pump body 1, lastly the pump cover 3 is installed on the pump body 1, during the installation, the first sealing structure 9 and the second sealing structure 10 are required to be installed correctly, so that the good sealing effect is achieved, lastly, the rotating speed and the torque of the stator 8 are changed by adjusting the current and the frequency input into the coil of the stator 8, firstly the pump shaft 2 and the rotor 6 are installed on the pump body 1, secondly the impeller 5 is installed at one end of the pump shaft 2 far away from the rotor 6, thirdly the isolation sleeve 7 is installed on the pump body 1, thirdly the stator 8 is installed on the motor casing 4, and then the motor shell 4 is installed on the pump body 1, finally the pump cover 3 is installed on the pump body 1, the first sealing structure 9 and the second sealing structure 10 are installed correctly during installation so as to achieve a good sealing effect, and finally the rotating speed and the torque of the stator 8 are changed by adjusting the current and the frequency input into a coil of the stator 8.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.
Claims (5)
1. The utility model provides a centrifugal chemical industry process pump of no leakage magnetic drive, includes the pump body (1) and pump shaft (2), pump shaft (2) rotate connect in the pump body (1), pump body (1) both ends are fixedly connected with pump cover (3), motor casing (4) respectively, pump shaft (2) both ends are connected with impeller (5) and rotor (6) respectively, the pump body (1) is close to rotor (6) one side fixedly connected with separation sleeve (7), its characterized in that: motor casing (4) inside fixedly connected with stator (8), stator (8) include a plurality of electrical coil (81), stator (8) with leave the clearance between isolation sleeve (7), rotor (6) are including turning (61), turn (61) evenly inlay all around and be equipped with a plurality of permanent magnets (62).
2. A leak-free magnetically driven centrifugal chemical process pump according to claim 1, wherein: the material of the rotating body (61) is high-strength engineering plastic, and a polyether-ether-ketone coating is brushed on the surface of the permanent magnet (62).
3. A leak-free magnetically driven centrifugal chemical process pump according to claim 1, wherein: a cooling channel (11) is formed in the pump body (1), and a cavity formed by the rotor (6) and the isolation sleeve (7) is communicated with a cavity formed between the pump body (1) and the pump cover (3) through the cooling channel (11).
4. A leak-free magnetically driven centrifugal chemical process pump according to claim 1, wherein: the isolation sleeve (7) with pump body (1) junction is equipped with first seal structure (9), motor casing (4) with pump body (1) junction is equipped with second seal structure (10).
5. A leak-free magnetically driven centrifugal chemical process pump according to claim 1, wherein: the isolation sleeve (7) is made of high-strength engineering plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121378869.1U CN215409249U (en) | 2021-06-21 | 2021-06-21 | Centrifugal chemical process pump of no leakage magnetic drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121378869.1U CN215409249U (en) | 2021-06-21 | 2021-06-21 | Centrifugal chemical process pump of no leakage magnetic drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215409249U true CN215409249U (en) | 2022-01-04 |
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ID=79640647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121378869.1U Active CN215409249U (en) | 2021-06-21 | 2021-06-21 | Centrifugal chemical process pump of no leakage magnetic drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215409249U (en) |
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2021
- 2021-06-21 CN CN202121378869.1U patent/CN215409249U/en active Active
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