CN102410242A - Sliding bearing for magnetic pumps and clearance compensation structure thereof - Google Patents
Sliding bearing for magnetic pumps and clearance compensation structure thereof Download PDFInfo
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- CN102410242A CN102410242A CN2010102905880A CN201010290588A CN102410242A CN 102410242 A CN102410242 A CN 102410242A CN 2010102905880 A CN2010102905880 A CN 2010102905880A CN 201010290588 A CN201010290588 A CN 201010290588A CN 102410242 A CN102410242 A CN 102410242A
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Abstract
The invention relates to a sliding bearing for magnetic pumps and a clearance compensation structure thereof. The sliding bearing for magnetic pumps comprises a bearing bush and a bearing pedestal, the bearing bush is sleeved on an impeller shaft, the bearing pedestal is matched with the bearing bush and connected with a pump body, the outer circumference of the bearing bush is provided with at least one limit dais, which is a platform or a boss, and the bearing bush-mounting hole of the bearing pedestal is provided with a platform or a notch matched with the limit dais; the clearance compensation structure of the sliding bearing for magnetic pumps comprises the bearing bush sleeved on the impeller shaft and the bearing pedestal, the bearing bush is mounted in the bearing pedestal, and the diameter of the outer circumference of the bearing bush is smaller than the diameter of the bearing bush-mounting hole of the bearing pedestal; a clearance compensation ring is arranged between the bearing bush and the bearing pedestal, and is a shrinkable elastic body, and the outer side of the clearance compensation ring respectively abuts against the outer circumference of the bearing bush and the inner wall of the bearing bush-mounting hole.
Description
Technical field
The present invention relates to a kind of magnetic drive pump, especially relate to a kind of Magnetic Drive Pump Sliding Bearing and gap collocation structure thereof.
Background technique
Magnetic drive pump is widely used in industries such as chemical industry, oil, printing and dyeing, medicine, food, plating; In order to liquid such as transfer oil and chemical mediators; The various characteristics of comprehensive these media just requires magnetic drive pump corrosion-resistant, high temperature resistant, high pressure resistant, and the sealing of zero leakage is arranged.The impeller shaft of existing magnetic drive pump adopts the sliding bearing location more, and the bearing shell of sliding bearing is sheathed on impeller shaft, and bearing support is connected with the pump housing, and for example the publication of " magnetic drive pump " (publication number CN 10l149060A) by name promptly is this kind structure.This traditional Magnetic Drive Pump Sliding Bearing; Its bearing shell generally all is designed to circular shape; Bearing shell and bearing support are interference fit, are subject to the characteristic of magnetic drive pump Environmental Conditions, fed sheet of a media, and bearing support adopts metal material more; And bush material generally adopts nonmetallic material, and mostly these nonmetallic material are brittle material.In practical application; Traditional Magnetic Drive Pump Sliding Bearing some shortcomings part: one of which; When mounted, because bearing shell and bearing support are interference fit, bearing shell is pressed into the assembling of bearing support; Generally will be through beating or hard mode of pressing, these modes make the bearing shell of brittle material very easily broken in assembly process; They are two years old; When operation, the bearing shell of unlike material and bearing support, magnitude of interference between the two constantly change with temperature variation; Especially magnitude of interference can become big when temperature rises; Bearing support rises for the pressure stress of bearing shell thereupon, and too high pressure stress causes bearing shell to be easy to broken the inefficacy, makes magnetic drive pump generation operation troubles; Its three, when maintenance maintenance, because sliding bearing is interference fit; Bearing shell is difficult to pull down replacing, strikes bearing shell firmly and also probably fitting surface is destroyed, after fitting surface is impaired; Both be difficult to install new bearing shell, it is not good to cause new bearing shell to cooperate with bearing support again thus, and causes the magnetic drive pump operation bad; Its four, when operating temperature was low, the not enough situation of interference possibly appear in cooperating between bearing shell and the bearing support, when interference was not enough, bearing shell can produce the phenomenon of transfer impeller shaft, transfer phenomenon causes the inefficacy of grinding away of the bearing shell mounting hole on the bearing support.
Summary of the invention
Main purpose of the present invention provides a kind of Magnetic Drive Pump Sliding Bearing, on its bearing shell limit dais is set, and prevents that by limit dais bearing shell from rotating in bearing support, can avoid bearing shell can produce the phenomenon of transfer impeller shaft effectively.
Another purpose of the present invention provides a kind of gap collocation structure of Magnetic Drive Pump Sliding Bearing, and it is provided with the gap compensating ring between bearing shell and bearing support; When the gap between bearing shell and the bearing support changes, make instant dynamic compensation, make bearing shell in bearing support, keep the centering state by the gap compensating ring; Compared to traditional over-surplus fit structure, this structure is prone to install, dismounting, at high temperature also is difficult for broken the inefficacy.
Above-mentioned technical problem of the present invention mainly is able to solve through following technical proposals: a kind of limit structure of Magnetic Drive Pump Sliding Bearing; Comprise the bearing shell that is sheathed on the impeller shaft; And it is adaptive and be connected in the bearing support of the pump housing with this bearing shell; At least be provided with a limit dais that is used to prevent its rotation on the said bearing shell excircle, this limit dais is platform or boss, is provided with platform or the groove adaptive with limit dais in the bearing shell mounting hole on the bearing support.
Cooperation through the bearing shell mounting hole; Bearing shell is circumferentially located by the arc surface on the circumference; Limit dais forms circumferentially spacing, can overcome the circumferential friction torque that the impeller shaft high speed rotating brings thus, and bearing shell can not produced relative rotation in bearing support; Avoided the phenomenon of bearing shell transfer when interference is not enough of conventional construction, the situation of also grinding away and losing efficacy with regard to the bearing support of having avoided transfer phenomenon to cause.
A kind of gap collocation structure of Magnetic Drive Pump Sliding Bearing comprises the bearing shell that is sheathed on the impeller shaft, and the bearing support that this bearing shell is installed, and the diameter of said bearing shell excircle is less than the diameter of the bearing shell mounting hole on the bearing support; Between bearing shell and bearing support, be provided with the gap compensating ring, this gap compensating ring is the elastomer of collapsible distortion, and outside is resisted against bearing shell periphery, bearing shell mounting hole inwall respectively in it.
Bearing shell excircle diameter is less than the bearing shell mounting hole diameter on the bearing support; Make between bearing shell and the mounting hole and form the clearance for expansion; The clearance for expansion is the space that bearing shell and bearing support mounting hole provide expanded by heating; Avoid the thermal expansion distortion that bearing shell is formed excessive pressure stress, be easy to the broken problem that lost efficacy thereby overcome conventional construction bearing shell when temperature rises; In addition, this structure that is provided with the gap makes the assembling of bearing shell and changes operation more simply, easily, and bearing shell can not push impaired in assembly process.
The gap compensating ring of collapsible distortion is filled between bearing shell and the bearing shell mounting hole, and its elastic force is applied on the bearing shell circumference; No matter operating temperature raises is still reduced, and under the elastic force effect of gap compensating ring, bearing shell keeps coaxial with the bearing shell mounting hole all the time; Therefore, the structure of gap compensating ring is set,, just make bearing shell have the ability of automatic centering, that is the bearing shell center remains at and the supercentral ability of bearing shell mounting hole as long as control the elastic force of gap compensating ring well.In addition; The gap compensating ring has certain elasticity; Play good cushioning effect in that magnetic drive pump is in service, improved the ability of the anti-vibrating and impact of bearing shell, bearing shell is played a protective role; Especially the bearing shell made of brittle material, this cushioning effect can significantly improve integrally-built impact resistance.
When operating temperature raises, bearing shell and bearing support temperature distortion, the bearing shell external diameter enlarges, the bearing shell mounting hole on the bearing support shrinks, two is superimposed, bearing shell be prone to and bearing support between form bigger magnitude of interference, excessive magnitude of interference is prone to make bearing shell impaired; For avoiding this kind situation, as preferably, the diameter of said bearing shell excircle and bearing shell mounting hole inner circumference poor, bearing shell excircle and bearing shell mounting hole inner circumference radial heat distortion amount sum when being equivalent to maximum operation temperature.This structure at high temperature, can not form interference fit between bearing shell and the bearing support, perhaps forms interference fit, but its magnitude of interference can be not excessive yet, thereby has further protected not temperature distortion of bearing shell damage.
For making bearing shell circumferentially stressed more even, as preferably, said limit dais is 2-6, is evenly distributed on the bearing shell excircle.The equally distributed structure of limit dais can prevent that the bearing shell circumference is stressed irregular and produce the stress raisers phenomenon, make the relevant part of bearing shell not reason bear too high stress and deformed damaged.
As preferably, the material of said bearing shell is for being graphite or pottery or Tungsten carbite or silicon carbide.These nonmetallic material, corrosion-resistant, high temperature resistant, be prone to make moulding, and have wear-resisting property preferably, the bearing shell of these material when carrying the medium of high temperature, high burn into high pressure, has long working life.
The size of magnetic drive pump has plurality of specifications, and bearing shell also has the plurality of specifications that varies in size; As preferably, the transverse section of said gap compensating ring is circle or ellipse or bar shaped.The transverse section is the gap compensating ring of strip structure, has bigger area of contact with bearing shell, also bigger elastic force can be provided; In the practical application, can select according to concrete condition.
Be further to improve the concentricity of bearing shell and bearing shell mounting hole, as preferably, said bearing shell two ends respectively are provided with 1-3 gap compensating ring.
As preferably, circumferentially be provided with groove on the said bearing shell outer surface, said gap compensating ring is located in this groove.This structure can prevent that the gap compensating ring from moving axially along bearing shell surface, and making that the bearing shell two ends are stressed can disequilibrium.
As preferably, said gap compensating ring and bearing shell are the overall structure of integral production.This integrative-structure makes the assembling of bearing shell easier, prevents more effectively that also the gap compensating ring from moving on bearing shell.
Therefore, the present invention has following beneficial effect:
1, on the bearing shell circumference, be provided with limit dais and with formation circumferentially spacing; Arc surface by on the circumference is circumferentially located; No matter how operating temperature changes; Bearing shell all can be fixed in the bearing support reliably, has avoided conventional construction the phenomenon that the interference deficiency causes the bearing shell transfer when temperature variation, to occur effectively.
2, between bearing shell and the bearing shell mounting hole clearance for expansion is set, the clearance for expansion is the space that bearing shell and bearing support mounting hole provide expanded by heating, avoids the thermal expansion distortion that bearing shell is formed excessive pressure stress; This structure that is provided with the gap makes the assembling of bearing shell and changes operation more simply, easily, and bearing shell can not push impaired in assembly process;
3, the gap compensating ring of collapsible distortion when the variation of operating temperature, both can make bearing shell locate from centering, again bearing shell had been played the better protect effect.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of a kind of Magnetic Drive Pump Sliding Bearing of the present invention and gap collocation structure thereof;
Accompanying drawing 2 is the I place enlarged diagrams in the accompanying drawing 1;
Accompanying drawing 3 is the II place enlarged diagrams in the accompanying drawing 2;
Accompanying drawing 4 is a kind of structural representations of bearing shell;
Accompanying drawing 5 is another kind of structural representations of bearing shell.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technological scheme of the present invention.
Embodiment: the present invention is shown in accompanying drawing 1, accompanying drawing 2; Comprise the bearing shell 4 that is sheathed on the impeller shaft 8; And this bearing shell 4 is installed, is connected in the bearing support 3 of the pump housing 1; At least be provided with a limit dais 41 that is used to prevent its rotation on bearing shell 4 excircles, this limit dais 41 is platform or boss, is provided with platform or the groove adaptive with limit dais 41 in the bearing shell mounting hole on the bearing support 3.
Shown in accompanying drawing 4, accompanying drawing 5, limit dais 41 is 1-6, is evenly distributed on bearing shell 4 excircles.
The material of bearing shell 4 is graphite or pottery or Tungsten carbite or silicon carbide.
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, the diameter of bearing shell 4 excircles makes between bearing shell 4 and the mounting hole and forms the clearance for expansion less than the diameter of the bearing shell mounting hole on the bearing support 3, and the clearance for expansion is the space that bearing shell 4 and mounting hole provide expanded by heating.The diameter of bearing shell 4 excircles and bearing shell mounting hole inner circumference poor, the sum of bearing shell 4 excircles and bearing shell mounting hole inner circumference radial heat distortion amount when being equivalent to maximum operation temperature.
Be provided with gap compensating ring 7 at bearing shell 4 and 3 of bearing supports, this gap compensating ring 7 is the elastomer of collapsible distortion, and outside is resisted against the inwall of bearing shell 4 peripheries, bearing shell mounting hole respectively in it.
The transverse section of gap compensating ring 7 is circle or ellipse or bar shaped.
When installing and using, bearing support 3 one ends are fixedly connected on the pump housing 1, and the bearing shell mounting hole two ends on the bearing support 3 respectively are provided with a secondary bearing shell 4, and bearing shell 4 is set on the impeller shaft 8.
For being connected of bearing shell 4 and impeller shaft 8, can be bearing shell 4 and impeller shaft 8 direct contact forms, the mediate contact form of axle sleeve also is set between the two, axle sleeve is fixed on the impeller shaft 8, and excircle and bearing shell 4 inner peripheral surfaces formation are slidingly matched.
Claims (10)
1. Magnetic Drive Pump Sliding Bearing; Comprise the bearing shell (4) that is sheathed on the impeller shaft (8); And this bearing shell (4) is installed, is connected in the bearing support (3) of the pump housing (1); It is characterized in that: be provided with a limit dais (41) that is used to prevent its rotation on said bearing shell (4) excircle at least, this limit dais (41) is platform or boss, is provided with in the bearing shell mounting hole on the bearing support (3) and adaptive platform or the groove of limit dais (41).
2. a kind of Magnetic Drive Pump Sliding Bearing according to claim 1; It is characterized in that: the diameter of said bearing shell (4) excircle is less than the diameter of bearing shell mounting hole; Both diameters poor, (4) excircle of bearing shell when being equivalent to maximum operation temperature and bearing shell mounting hole inner circumference radial heat distortion amount sum.
3. a kind of Magnetic Drive Pump Sliding Bearing according to claim 1 and 2 is characterized in that: said limit dais (41) is evenly distributed on bearing shell (4) excircle for 1-6.
4. a kind of Magnetic Drive Pump Sliding Bearing according to claim 1 and 2 is characterized in that: the material of said bearing shell (4) is graphite or pottery or Tungsten carbite or silicon carbide.
5. the gap collocation structure of a Magnetic Drive Pump Sliding Bearing; Comprise the bearing shell (4) that is sheathed on the impeller shaft (8); And this bearing shell (4) is installed, is connected in the bearing support (3) of the pump housing (1), it is characterized in that: the diameter of said bearing shell (4) excircle is less than the diameter of the bearing shell mounting hole on the bearing support (3); Between bearing shell (4) and bearing support (3), be provided with gap compensating ring (7), this gap compensating ring (7) is the elastomer of collapsible distortion, and outside is resisted against bearing shell (4) periphery, bearing shell mounting hole inwall respectively in it.
6. the gap collocation structure of a kind of Magnetic Drive Pump Sliding Bearing according to claim 5; It is characterized in that: the diameter of said bearing shell (4) excircle and bearing shell mounting hole inner circumference poor, the sum of (4) excircle of bearing shell when being equivalent to maximum operation temperature and bearing shell mounting hole inner circumference radial heat distortion amount.
7. the gap collocation structure of a kind of Magnetic Drive Pump Sliding Bearing according to claim 5, it is characterized in that: the transverse section of said gap compensating ring (7) is circle or ellipse or bar shaped.
8. according to the gap collocation structure of claim 5 or 6 or 7 described a kind of Magnetic Drive Pump Sliding Bearing, it is characterized in that: said bearing shell (4) two ends respectively are provided with 1-3 gap compensating ring (7).
9. according to the gap collocation structure of claim 5 or 6 or 7 described a kind of Magnetic Drive Pump Sliding Bearing, it is characterized in that: circumferentially be provided with groove on said bearing shell (4) outer surface, said gap compensating ring (7) is located in this groove.
10. according to the gap collocation structure of claim 5 or 6 or 7 described a kind of Magnetic Drive Pump Sliding Bearing, it is characterized in that: said gap compensating ring (7) is the overall structure of integral production with bearing shell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010290588.0A CN102410242B (en) | 2010-09-25 | 2010-09-25 | Sliding bearing for magnetic pumps and clearance compensation structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010290588.0A CN102410242B (en) | 2010-09-25 | 2010-09-25 | Sliding bearing for magnetic pumps and clearance compensation structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102410242A true CN102410242A (en) | 2012-04-11 |
| CN102410242B CN102410242B (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010290588.0A Active CN102410242B (en) | 2010-09-25 | 2010-09-25 | Sliding bearing for magnetic pumps and clearance compensation structure thereof |
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| CN (1) | CN102410242B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573682A (en) * | 2012-07-31 | 2014-02-12 | 上海佰诺泵阀有限公司 | Magnetic drive pump with bearing block |
| CN104314859A (en) * | 2014-08-27 | 2015-01-28 | 天津中环电子照明科技有限公司 | Impeller positioning method for micro rotary mechanical pump |
| CN112392759A (en) * | 2020-11-23 | 2021-02-23 | 安徽信成泵阀有限公司 | Magnetic drive pump sliding bearing and clearance compensation structure thereof |
| CN113266567A (en) * | 2021-06-18 | 2021-08-17 | 台州市浙兴真空设备制造有限公司 | Slide valve type vacuum pump |
| CN113586512A (en) * | 2015-09-30 | 2021-11-02 | 浙江三花汽车零部件有限公司 | Rotor assembly and electric drive pump |
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| CN201818536U (en) * | 2010-09-25 | 2011-05-04 | 太仓顺达磁力泵科技有限公司 | High-temperature resistant sliding bearing of magnetic drive pump and clearance compensation structure thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573682A (en) * | 2012-07-31 | 2014-02-12 | 上海佰诺泵阀有限公司 | Magnetic drive pump with bearing block |
| CN104314859A (en) * | 2014-08-27 | 2015-01-28 | 天津中环电子照明科技有限公司 | Impeller positioning method for micro rotary mechanical pump |
| CN113586512A (en) * | 2015-09-30 | 2021-11-02 | 浙江三花汽车零部件有限公司 | Rotor assembly and electric drive pump |
| CN113586512B (en) * | 2015-09-30 | 2023-12-26 | 浙江三花汽车零部件有限公司 | Rotor assembly and electrically driven pump |
| CN112392759A (en) * | 2020-11-23 | 2021-02-23 | 安徽信成泵阀有限公司 | Magnetic drive pump sliding bearing and clearance compensation structure thereof |
| CN113266567A (en) * | 2021-06-18 | 2021-08-17 | 台州市浙兴真空设备制造有限公司 | Slide valve type vacuum pump |
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| CN102410242B (en) | 2014-08-20 |
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