CN214465079U - Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump - Google Patents

Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump Download PDF

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Publication number
CN214465079U
CN214465079U CN202120297791.4U CN202120297791U CN214465079U CN 214465079 U CN214465079 U CN 214465079U CN 202120297791 U CN202120297791 U CN 202120297791U CN 214465079 U CN214465079 U CN 214465079U
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magnetic liquid
pole
centrifugal pump
quenching
shell
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CN202120297791.4U
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Chinese (zh)
Inventor
邢斐斐
郝瑞参
季君
田小强
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Beijing Polytechnic
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Beijing Polytechnic
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Abstract

The utility model discloses a magnetic liquid rotary sealing device of a sludge incineration quenching centrifugal pump, which is connected with a mechanical seal cover at the impeller end of the centrifugal pump, and comprises a shell, a chassis is sleeved at one end of the shell, the other end of the shell is connected with the seal cover, the chassis is connected with the mechanical seal cover through a bolt, an annular groove is arranged on the wall surface of the chassis opposite to the mechanical seal cover, a sealing ring is arranged in the annular groove, a bearing is respectively sleeved between the two ends of the cavity of the shell and a rotating shaft, a plurality of spaced pole shoes are annularly arranged in the cavity between the two bearings, a permanent magnet ring used as a magnetic source is arranged between the adjacent pole shoes, the outer ring of the pole shoe and a permanent magnet are attached on the inner wall of the cavity of the shell, the inner ring of the pole shoe is provided with a plurality of spaced pole teeth, magnetic liquid is injected between the pole teeth and the rotating shaft, the permanent magnet ring absorbs the magnetic liquid at the pole teeth to form a plurality of magnetic liquid rings, and a nitrile rubber ring is arranged between the pole shoes at the two ends and the bearing.

Description

Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump
Technical Field
The utility model relates to a magnetic liquid rotary sealing device of sludge incineration rapid cooling centrifugal pump.
Background
The magnetic liquid is a novel functional material, and is a stable colloidal solution formed by uniformly dispersing nanoscale magnetic solid particles in a base carrier liquid. One of the most important applications of magnetic fluids is magnetic fluid sealing. The magnetic liquid seal has tight sealing performance, and the leakage rate of the magnetic liquid seal is almost difficult to measure; and because it is non-contact seal, so it has long service life, high reliability and can bear high rotating speed.
The sludge or garbage incineration project in the environmental protection project needs to use a high-speed operation centrifugal pump as a quenching device to cool flue gas, and according to the scale of sludge or garbage incineration treatment capacity, the high-speed rotation speed of the centrifugal pump is between 3000rpm and 4500rpm, the lift is usually 120m to 160m, and the lift of some garbage incineration projects with larger daily treatment capacity is usually more than 200 m. If the traditional contact type mechanical shaft seal is adopted for sealing, after normal operation, due to the fact that the project is interrupted for many times due to sealing failure of the rapid cooling water pump, the caused maintenance problem and the normal project operation problem cannot be ignored.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a magnetic liquid rotary seal device of sludge incineration rapid cooling centrifugal pump, it is sealed effectual.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a rotary magnetic liquid sealing device of sludge incineration quenching centrifugal pump is connected with a mechanical seal gland at the impeller end of the centrifugal pump, and comprises a shell, wherein a chassis is fixedly sleeved at one end of the shell, the other end of the shell is connected with the seal gland, the chassis is connected with the mechanical seal gland through a bolt, an annular groove is formed in the wall surface of the chassis opposite to the mechanical seal gland, a sealing ring is arranged in the annular groove, a bearing is respectively sleeved between the two ends of a pore cavity of the shell and a rotating shaft, a plurality of spaced pole shoes are annularly arranged in the pore cavity between the two bearings, a permanent magnet ring serving as a magnetic source is arranged between the adjacent pole shoes, the outer ring of each pole shoe and a permanent magnet are attached to the inner wall of the pore cavity of the shell, a plurality of spaced pole teeth are arranged on the inner ring of each pole shoe, magnetic liquid is injected between each pole tooth and the rotating shaft, and the magnetic liquid is absorbed at the pole teeth to form a plurality of magnetic liquid rings by the permanent magnet ring, and a nitrile rubber ring is arranged between the pole shoes at the two ends and the bearing.
Preferably, the shell is made of non-magnetic-conductive 304 stainless steel materials.
Preferably, the pole shoes are six.
Preferably, each pole shoe comprises four said pole teeth.
Preferably, the rotating shaft is 1Cr 13.
Preferably, the permanent magnet ring is made of neodymium iron boron, and the pole shoe and the pole teeth are made of electrician pure iron.
Preferably, the cover is connected to the housing by a screw thread or a bolt.
The utility model has the advantages that: the device is applicable to the sealing link of quench pump station centrifugal pump among the sludge incineration engineering, satisfies the sealed requirement of centrifugal pump, is applicable to its high-speed operating condition, and the stable performance, and because magnetic liquid's stability, this sealing device adapts to sludge or waste incineration's smoke environment equally, long service life need not frequent maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the embodiments will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the usage state of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The following description is given by way of example only, and not by way of limitation, of the scope of the invention.
As shown in fig. 1 and fig. 2, for a preferred embodiment of the present invention, a magnetic liquid rotary sealing device of a sludge incineration quenching centrifugal pump, the sealing device 2 is connected with a mechanical seal cover 11 at an impeller end of the centrifugal pump 1, and comprises a housing 21, a chassis 22 is sleeved and fixed at one end of the housing 21, a seal cover 23 is connected at the other end of the housing, the chassis 22 is connected with the mechanical seal cover 11 through bolts, an annular groove is formed on a wall surface of the chassis 22 opposite to the mechanical seal cover 11, a seal ring 24 is arranged in the annular groove, a bearing 25 is respectively sleeved between two ends of a bore of the housing 21 and a rotating shaft 12, a plurality of spaced pole shoes 26 are annularly arranged in the bore between the two bearings 25, an iron ring 27 as a magnetic source is arranged between adjacent pole shoes 26, an outer ring of the pole shoe and a permanent magnet are attached to an inner wall of the bore of the housing, an inner ring of the pole shoe 26 is provided with a plurality of spaced pole teeth 28, magnetic liquid 29 is injected between the pole teeth 28 and the rotating shaft 12, the permanent magnet ring 27 absorbs the magnetic liquid at the pole teeth to form a plurality of magnetic liquid rings, and a nitrile rubber ring 30 is arranged between the pole shoes at the two ends and the bearing.
The shell 21 is made of non-magnetic-conductive 304 stainless steel material; the number of the pole shoes 26 is six, each pole shoe comprises four pole teeth 28, the number of the pole teeth is 24 in total, the size of each pole tooth is the same, the number of the pole teeth can be different, 2 or 3 pole teeth can be machined on each pole shoe, and theoretically, the more the number of the pole teeth is, the more the magnetic circuit is, the larger the magnetic field gradient is; the pole shoe and the pole teeth are made of electrician pure iron; the permanent magnet ring 27 is made of neodymium iron boron, a permanent magnet is used as a magnetic source and is arranged between the pole shoes, and magnetic liquid is absorbed at the pole teeth to form a plurality of magnetic liquid rings; the magnetic liquid can be ester-based magnetic liquid, kerosene-based magnetic liquid or engine oil-based magnetic liquid.
The rotating shaft 12 is 1Cr 13; the cover 23 is screwed or bolted to the housing 21.
The sealing device is suitable for the sealing link of the centrifugal pump of the quenching pump station in the sludge incineration engineering, meets the sealing requirement of the centrifugal pump, is suitable for the working condition of high-speed operation, has stable performance, is also suitable for the smoke environment of sludge or garbage incineration due to the stability of magnetic liquid, has long service life and does not need frequent maintenance.

Claims (7)

1. A magnetic liquid rotary sealing device of a sludge incineration quenching centrifugal pump is characterized in that the magnetic liquid rotary sealing device is connected with a machine sealing cover at the impeller end of the centrifugal pump and comprises a shell, a chassis is sleeved and fixed at one end of the shell, the other end of the shell is connected with the sealing cover, the chassis is connected with the machine sealing cover through a bolt, an annular groove is formed in the wall surface of the chassis opposite to the machine sealing cover, a sealing ring is arranged in the annular groove, a bearing is respectively sleeved between the two ends of a hole cavity of the shell and a rotating shaft, a plurality of spaced pole shoes are annularly arranged in the hole cavity between the two bearings, a permanent magnet ring used as a magnetic source is arranged between the adjacent pole shoes, the outer ring of each pole shoe and a permanent magnet are attached to the inner wall of the hole cavity of the shell, a plurality of spaced pole teeth are arranged on the inner ring of each pole shoe, magnetic liquid is injected between each pole tooth and the rotating shaft, and is absorbed at the pole teeth to form a plurality of magnetic liquid rings, and a nitrile rubber ring is arranged between the pole shoes at the two ends and the bearing.
2. The magnetic liquid rotary sealing device of the sludge incineration quenching centrifugal pump as claimed in claim 1, wherein the housing is made of non-magnetic-conductive 304 stainless steel material.
3. The magnetic liquid rotary sealing device of the sludge incineration quenching centrifugal pump as claimed in claim 1, wherein the number of the pole shoes is six.
4. The magnetic-liquid rotary sealing device of the sludge incineration quenching centrifugal pump as claimed in claim 3, wherein each pole shoe comprises four pole teeth.
5. The magnetic liquid rotary sealing device of the sludge incineration quenching centrifugal pump as claimed in claim 1, wherein the rotating shaft is 1Cr 13.
6. The magnetic liquid rotary sealing device of the sludge incineration quenching centrifugal pump as claimed in claim 1, wherein the permanent magnet ring is made of neodymium iron boron material, and the pole shoe and the pole teeth are made of electrical pure iron.
7. The magnetic liquid rotary sealing device of the sludge incineration quenching centrifugal pump as claimed in claim 1, wherein the sealing cover is connected with the casing through threads or bolts.
CN202120297791.4U 2021-02-02 2021-02-02 Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump Active CN214465079U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120297791.4U CN214465079U (en) 2021-02-02 2021-02-02 Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120297791.4U CN214465079U (en) 2021-02-02 2021-02-02 Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump

Publications (1)

Publication Number Publication Date
CN214465079U true CN214465079U (en) 2021-10-22

Family

ID=78142509

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120297791.4U Active CN214465079U (en) 2021-02-02 2021-02-02 Magnetic liquid rotary sealing device of sludge incineration quenching centrifugal pump

Country Status (1)

Country Link
CN (1) CN214465079U (en)

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