CN205550167U - A seal structure for protecting magnetic stirrers inner rotor bearing - Google Patents
A seal structure for protecting magnetic stirrers inner rotor bearing Download PDFInfo
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- CN205550167U CN205550167U CN201620374681.2U CN201620374681U CN205550167U CN 205550167 U CN205550167 U CN 205550167U CN 201620374681 U CN201620374681 U CN 201620374681U CN 205550167 U CN205550167 U CN 205550167U
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- bearing
- main shaft
- rotor cavity
- gas
- stuffing
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Abstract
The utility model discloses a seal structure for protecting magnetic stirrers inner rotor bearing, this structure includes that interior magnet steel reaches rigid connection's main shaft with it, installs inner rotor bearing and bearing retainer on the main shaft, the packing box is installed to the bearing retainer lower extreme, is equipped with two section at least fillers in the packing box from top to bottom, keeps apart through air distributor between two sections adjacent fillers, interior magnet steel is equipped with the separation sleeve outward, the rotor cavity body in forming between separation sleeve and bearing retainer, main shaft and the packing box, and interior rotor cavity body coupling has the air supply, and installs gaseous communicating pipe between the interior rotor cavity body and the air distributor. Through above design, but rotor cavity personally experiences sth. Part of the body and is expected by stirring article in the effective isolation magnetic stirrers to the corrosivity material stopping to be stirred or abradability granule cluster are gone into the bearing broadside on it are caused the harm, effectively prolong the running life of agitator bearing.
Description
Technical field
This utility model relates to roof-mounted magnetic agitation water-tight equipment technical field, is specifically related to a kind of magnetic stirring equipment being stirred for corrosivity and abrasive materials, for protecting the sealing structure of magnetic stirring apparatus inner rotor bearing.
Background technology
Magnetic stirring apparatus is mainly made up of motor, reductor, outer steel, separation sleeve, interior magnet steel, main shaft bearing, main shaft, stirring paddle etc..When outer magnetic cylinder rotates, magnetic field energy penetrates air-gap and namagnetic substance, drives the interior magnetic cylinder being connected with impeller to make synchronous rotary, it is achieved the non contact transmission of power, movable sealing is converted into static seal.Owing to inside and outside magnetic cylinder is completely isolated by separation sleeve, thus thoroughly solve " run, drip, leak " problem, eliminate the potential safety hazard that chemical industry is inflammable, explosive, poisonous, hazardous medium is by stirring sealing leak.
At present, magnetic agitation is mainly used in seal request higher, it is desirable to material does not allow the occasion to atmospheric air leakage.Under this operating mode, magnetic seal is static seal, and the effectiveness of sealing can be completely secured.
Conventional magnetic mixing needle is to totally designing without the corrosion-free material of granule, and internal rotor uses monolayer filler or lip type reinforced seal with storeroom, if it uses in clean material environment, agitator movable part can be lubricated by material, it is ensured that its cycle of operation.If being stirred material there is corrosivity or abrasion, inevitable material can enter internal rotor cavity, after material enters internal rotor cavity, the lubricant effect of inner rotor bearing can be affected, even in material, abrasive materials directly produces abrasion to operating bearing, accelerate the aging of bearing, cause the fault of magnetic stirring apparatus.
In polysilicon industry, partial material contains substantial amounts of Si or SiO2It is 7 or higher particulate matters etc. Mohs' hardness, these pellet hardnesses are far above bearing material hardness, in running, partial particulate material can spread or prolong main shaft creeps in entrance internal rotor cavity, once enter at bearing, countershaft manufacturing into abrasion and cause bearing rapid failure, the magnetic agitation of traditional structure is difficult to adapt to this operating mode.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of sealing structure for protecting magnetic stirring apparatus inner rotor bearing, it is achieved delay the inner rotor bearing wear-out period, the purpose of steady production.
For solving above-mentioned technical problem; this utility model be the technical scheme is that a kind of sealing structure for protecting magnetic stirring apparatus inner rotor bearing; including interior magnet steel and the most rigidly connected main shaft; inner rotor bearing and the support of bearing are installed on main shaft; support of bearing lower end is provided with stuffing-box, and it is socketed in outside main shaft, is rigidly connected with the support of bearing; from top to bottom equipped with at least two sections of fillers in stuffing-box, isolated by gas distributor between adjacent two sections of fillers；Interior magnet steel is externally provided with separation sleeve, forms internal rotor cavity between separation sleeve and the support of bearing, main shaft and stuffing-box, and internal rotor cavity connects to be had between source of the gas, and internal rotor cavity and gas distributor and be provided with air communicating pipe.
The lower section of described stuffing-box is provided with gland, for by filler, gas distributor compacting.The pre-moderate pressure of gland, too high meeting causes filler to seize, and weares and teares and generates heat and be serious, and too low meeting causes filler to contact with main shaft cannot compensating its wear extent in leakiness, or operation and cause poorly sealed.Stuffing-box is tubular, and design facilitates the replacing of gas distributor and filler.
Described main shaft is provided with scuff-resistant coating in the position contacting friction with filler.
Described filler is the cubic packing filling using leaching graphite or tetrafluoroethene to make；Its self-lubricating effect is good, heat dispersion is high, resistance is little, wear-resisting, and be convenient for changing.
Described gas distributor is loose porous shape hollow structure, and while having enough strength support fillers, it is ensured that gas distributed effect, at this, circular pneumatic is consistent, and it is metal material, ringwise.
Described internal rotor cavity is by being additionally provided with effusion meter, regulation valve and Pressure gauge on pipeline connection source of the gas, and pipeline.In from internal rotor cavity to still there is barometric gradient in pressure, and internal rotor chamber pressure is more than gas distributor pressure, and gas distributor pressure is more than pressure in still.The gas that source of the gas provides is filled with in internal rotor cavity, flows to gas distributor through air communicating pipe, prolongs filler and gap of main reinforcement trace or leak on a small quantity in still after distribution.
The caliber of described air communicating pipe is less than DN15.Air communicating pipe caliber is less, uses pipe with small pipe diameter to have certain throttling action when big flow.
Described source of the gas uses and is stirred that material does not produce chemical reaction, dissolubility is relatively low in material, bring the gas that will not pollute subsequent process flow after in still into, general selection nitrogen or argon simultaneously.
The method using described structure, concretely comprises the following steps:
1) first pass through supply in the inside rotor cavity of source of the gas, control internal rotor chamber pressure more than gas distributor pressure, gas distributor pressure more than outside reactor pressure；The gas making internal rotor cavity enters gas distributor, along the filler of stuffing-box hypomere and the gap of main shaft to outward leakage；In preventing still by the leakage of gas, material is redirected back into internal rotor cavity, reaches to protect the purpose of magnetic stirring apparatus inner rotor bearing；
2) running a period of time, when, after the filler wear out failure of stuffing-box hypomere, closing air communicating pipe, gas is leaked out by the gap between filler and the main shaft of stuffing-box epimere, reaches to protect the purpose of magnetic stirring apparatus inner rotor bearing；When all fillers in stuffing-box all lost efficacy, change filler and can carry out next sealing circulation.
Controlling bleed pressure table display pressure and be higher than pressure 0.05MPa-0.5MPa in stirred tank, gas flow is 1-10Nm3。
This sealing structure is on the basis of traditional structure magnetic agitation, increase source of the gas, inwardly be filled with in rotor cavity not be stirred the gas that material reacts, the lower end of the support of bearing increases stuffing-box, using two sections or more multistage filler in stuffing-box, multistage filler space uses gas distributor to be spaced.An air communicating pipe is increased between internal rotor cavity and this gas distributor.It is filled with internal rotor cavity and multistage filler space carries out positive pressure protection by stable in properties or for inert gas; allow noble gas to material side generation trace or to reveal on a small quantity simultaneously; to prevent material from sealing in internal rotor cavity; to protect inner rotor bearing; effectively extend the service life of magnetic agitation, reduce parking maintenance times.
The utility model proposes structure and the mode of a kind of brand-new protection magnetic stirring apparatus inner rotor bearing; it is effectively isolated magnetic stirring apparatus internal rotor cavity and is stirred material; seal in bearing side and it is caused damage stopping the corrosive materials that is stirred or abrasion granule, effectively extend the service life of agitator bearing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sealing structure for protecting magnetic stirring apparatus inner rotor bearing that this utility model provides.
Detailed description of the invention
Further illustrate this utility model below in conjunction with embodiment, but the scope that this utility model claims is not limited to the scope that embodiment is stated.
As shown in Figure 1; a kind of for protecting the sealing structure of magnetic stirring apparatus inner rotor bearing; including interior magnet steel 1 and the most rigidly connected main shaft 2; inner rotor bearing 3 and the support of bearing 4 are installed on main shaft 2; the support of bearing 4 lower end is provided with stuffing-box 5; from top to bottom equipped with at least two sections of fillers 6 in stuffing-box 5, isolated by gas distributor 7 between adjacent two sections of fillers；Interior magnet steel 1 is externally provided with separation sleeve 8, forms internal rotor cavity 9 between separation sleeve 8 and the support of bearing 4, main shaft 2 and stuffing-box 5, and internal rotor cavity 9 connects to be had between source of the gas 10, and internal rotor cavity 9 and gas distributor 7 and be provided with air communicating pipe 11.
Further, the lower section of described stuffing-box 5 is provided with gland 12.
Further, described main shaft is provided with scuff-resistant coating in the position contacting friction with filler.
Further, described filler is the cubic packing filling using leaching graphite or tetrafluoroethene to make.
Further, described gas distributor 7 is loose porous shape hollow structure.
Further, described internal rotor cavity 9 connects source of the gas 10 by pipeline, and is additionally provided with effusion meter, regulation valve 13 and Pressure gauge 14 on pipeline.
The method using described structure, concretely comprises the following steps:
1) first pass through supply in the inside rotor cavity of source of the gas, control internal rotor chamber pressure more than gas distributor pressure, gas distributor pressure more than outside reactor pressure；The gas making internal rotor cavity enters gas distributor, along the filler of stuffing-box hypomere and the gap of main shaft to outward leakage；In preventing still by the leakage of gas, material is redirected back into internal rotor cavity, reaches to protect the purpose of magnetic stirring apparatus inner rotor bearing；
2) running a period of time, when, after the filler wear out failure of stuffing-box hypomere, closing air communicating pipe, gas is leaked out by the gap between filler and the main shaft of stuffing-box epimere, reaches to protect the purpose of magnetic stirring apparatus inner rotor bearing；When all fillers in stuffing-box all lost efficacy, change filler and can carry out next sealing circulation.
Controlling bleed pressure table display pressure and be higher than pressure 0.05MPa-0.5MPa in stirred tank, gas flow is 1-10Nm3。
In figure, 15 is outer rotor shaft, and 16 is outer steel, and 17 are filled with mouth for lubricating oil.Motor connects reductor, is connected with outer rotor shaft after slowing down, and drives outer steel to rotate, magnetic field penetration separation sleeve drags interior magnet steel synchronous rotary, interior magnet steel is rigidly connected with main shaft, and main shaft is rigidly connected with shaft, and material in still is stirred by power output to shaft and stirrer paddle.
In from internal rotor cavity to still there is barometric gradient in pressure, and internal rotor chamber pressure is more than gas distributor pressure, and gas distributor pressure is more than pressure in still.Noble gas is filled with in internal rotor cavity, flows to gas distributor through air communicating pipe, prolongs filler and gap of main reinforcement trace or leak on a small quantity in still after distribution.
It addition, in use, the gas of stable in properties enters internal rotor cavity after source of the gas is in pipeline pressure regulation, and in internal rotor cavity, gas prolongs two-way entrance gas distributor, and air communicating pipe of leading up to enters；Another road enters through stuffing-box epimere filler and gap of main reinforcement.Noble gas, after gas distributor is uniformly distributed, prolongs stuffing-box hypomere filler and gap of main reinforcement trace or leak on a small quantity in still.It is redirected back into internal rotor cavity infringement inner rotor bearing with material in stopping still.
In a cycle of operation, both with reference to pressure reduction in internal rotor cavity and still in the control of gas, referring also to flow.The abrasion of initial operating stage filler is lighter, main shaft is little with filler space, quantity of gas leakage is little, when internal rotor cavity is bigger with pressure reduction in still, it is less that noble gas is filled with flow, now can keep higher pressure reduction, to ensure that inert gas flow carries out purging and ensures that material does not enter gap filler and gap of main reinforcement, take away both mutual fricative heats simultaneously.Along with the lengthening of cycle of operation, the wear extent of filler strengthens, and the gap of filler and main shaft increases, and the pressure that internal rotor cavity is less with in still is it is ensured that filler and gap of main reinforcement are purged by the flow that is filled with of noble gas.End-of-run, if the worn-out inefficacy of hypomere filler, bleed pressure is less with pressure reduction in still, and gas flow then shows lower end sealing failure of fillers relatively greatly simultaneously, can seal off enabling epimere filler by air communicating pipe throttling or block.
Claims (6)
1. the sealing structure being used for protecting magnetic stirring apparatus inner rotor bearing; including interior magnet steel (1) and the most rigidly connected main shaft (2); inner rotor bearing (3) and the support of bearing (4) are installed on main shaft (2); it is characterized in that: the support of bearing (4) lower end is provided with stuffing-box (5); it is socketed in outside main shaft; it is rigidly connected with the support of bearing, from top to bottom equipped with at least two sections of fillers (6) in stuffing-box (5), is isolated by gas distributor (7) between adjacent two sections of fillers；Interior magnet steel (1) is externally provided with separation sleeve (8), internal rotor cavity (9) is formed between separation sleeve (8) and the support of bearing (4), main shaft (2) and stuffing-box (5), internal rotor cavity (9) connects to be had between source of the gas (10), and internal rotor cavity (9) and gas distributor (7) and is provided with air communicating pipe (11).
Structure the most according to claim 1, it is characterised in that: the lower section of described stuffing-box (5) is provided with gland (12).
Structure the most according to claim 1, it is characterised in that: described main shaft is provided with scuff-resistant coating in the position contacting friction with filler.
Structure the most according to claim 1, it is characterised in that: described filler is the cubic packing filling using leaching graphite or tetrafluoroethene to make.
Structure the most according to claim 1, it is characterised in that: described gas distributor (7) is loose porous shape hollow structure.
Structure the most according to claim 1, it is characterised in that: described internal rotor cavity (9) connects source of the gas (10) by pipeline, and is additionally provided with effusion meter, regulation valve (13) and Pressure gauge (14) on pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620374681.2U CN205550167U (en) | 2016-04-28 | 2016-04-28 | A seal structure for protecting magnetic stirrers inner rotor bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620374681.2U CN205550167U (en) | 2016-04-28 | 2016-04-28 | A seal structure for protecting magnetic stirrers inner rotor bearing |
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| Publication Number | Publication Date |
|---|---|
| CN205550167U true CN205550167U (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620374681.2U Active CN205550167U (en) | 2016-04-28 | 2016-04-28 | A seal structure for protecting magnetic stirrers inner rotor bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908621A (en) * | 2019-04-12 | 2019-06-21 | 四川永祥多晶硅有限公司 | Slurry separates preposition transportation system and method |
| CN112723392A (en) * | 2020-12-02 | 2021-04-30 | 江苏昌吉利新能源科技有限公司 | Anhydrous lithium chloride continuous crystallization method |
-
2016
- 2016-04-28 CN CN201620374681.2U patent/CN205550167U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908621A (en) * | 2019-04-12 | 2019-06-21 | 四川永祥多晶硅有限公司 | Slurry separates preposition transportation system and method |
| CN112723392A (en) * | 2020-12-02 | 2021-04-30 | 江苏昌吉利新能源科技有限公司 | Anhydrous lithium chloride continuous crystallization method |
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| GR01 | Patent grant |