CN102410242B - 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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- CN102410242B CN102410242B CN201010290588.0A CN201010290588A CN102410242B CN 102410242 B CN102410242 B CN 102410242B CN 201010290588 A CN201010290588 A CN 201010290588A CN 102410242 B CN102410242 B CN 102410242B
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- bearing shell
- bearing
- mounting hole
- backlash compensation
- excircle
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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 backlash compensation structure thereof.
Background technique
Magnetic drive pump is widely used in the industries such as chemical industry, oil, printing and dyeing, medicine, food, plating, in order to the liquid such as transfer oil and chemical mediator, the various characteristics of comprehensive these media, just requires magnetic drive pump corrosion-resistant, high temperature resistant, high pressure resistant, and has the sealing of zero leakage.The impeller shaft of existing magnetic drive pump adopts sliding bearing location more, and the axle bush sleeve of sliding bearing is located at 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, is this kind of structure.This traditional Magnetic Drive Pump Sliding Bearing, its bearing shell is generally all designed to circular shape, bearing shell and bearing support are interference fit, be limited to the characteristic of magnetic drive pump Environmental Conditions, fed sheet of a media, bearing support adopts metal material more, and bush material generally adopts nonmetallic material, these nonmetallic material mostly are brittle material.In actual applications, traditional Magnetic Drive Pump Sliding Bearing some shortcomings part: one, when mounted, because bearing shell and bearing support are interference fit, bearing shell is pressed into the assembling of bearing support, generally will be by 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, in the time of operation, the bearing shell of unlike material and bearing support, magnitude of interference between the two varies with temperature and constantly changes, especially in the time of temperature rise, magnitude of interference can become large, bearing support rises for the pressure stress of bearing shell thereupon, and too high pressure stress causes bearing shell to be easy to break inactivation, makes magnetic drive pump generation operation troubles; Its three, in the time of maintenance maintenance, because sliding bearing is interference fit, bearing shell is difficult to pull down replacing, firmly strikes bearing shell and also probably fitting surface is destroyed, after fitting surface is impaired, both be difficult to install new bearing shell, and caused thus again new bearing shell to coordinate with bearing support not good, and caused magnetic drive pump operation bad; Its four, when operating temperature is lower, between bearing shell and bearing support, coordinate the situation that may occur interference deficiency, when interference is 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 bearing support.
Summary of the invention
Main purpose of the present invention is to provide 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 effectively avoid bearing shell can produce the phenomenon of transfer impeller shaft.
Another object of the present invention is to provide a kind of backlash compensation structure of Magnetic Drive Pump Sliding Bearing, and it is provided with backlash compensation circle between bearing shell and bearing support; When gap between bearing shell and bearing support changes, make instant dynamic compensation by backlash compensation circle, make bearing shell in bearing support, keep Shaft alignment state; Compared to traditional over-surplus fit structure, this structure is easily installed, is dismantled, and is at high temperature also difficult for break inactivation.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of limit structure of Magnetic Drive Pump Sliding Bearing, comprise the bearing shell being sheathed on impeller shaft, and adaptive and be connected in the bearing support of the pump housing with this bearing shell, on described bearing shell excircle, be at least provided with one for preventing the limit dais of its rotation, this limit dais is platform or boss, is provided with platform or groove with limit dais adaptation in the bearing shell mounting hole on bearing support.
By the cooperation of bearing shell mounting hole, bearing shell is circumferentially located by the arc surface on circumference, limit dais forms circumferentially spacing, can overcome thus the circumferential friction torque that impeller shaft High Rotation Speed brings, bearing shell can not produced relative rotation in bearing support, the phenomenon of the bearing shell of having avoided conventional construction transfer in the time that interference is not enough, also with regard to the bearing support of having avoided transfer phenomenon the to cause situation about losing efficacy of grinding away.
A backlash compensation structure for Magnetic Drive Pump Sliding Bearing, comprises the bearing shell being sheathed on impeller shaft, and the bearing support of this bearing shell is installed, and the diameter of described bearing shell excircle is less than the diameter of the bearing shell mounting hole on bearing support; Between bearing shell and bearing support, be provided with backlash compensation circle, the elastomer that this backlash compensation circle is collapsible distortion, in it, outside is resisted against respectively bearing shell periphery, bearing shell mounting hole inwall.
Bearing shell excircle diameter is less than the bearing shell mounting hole diameter on bearing support, make to form clearance for expansion between bearing shell and mounting hole, clearance for expansion provides the space of expanded by heating for bearing shell and bearing support mounting hole, avoid the thermal expansion distortion to form excessive pressure stress to bearing shell, thereby overcome conventional construction bearing shell in the time of temperature rise and be easy to the problem of break inactivation; In addition, thisly establish gapped structure, make the assembling of bearing shell and change operation simpler, easily, bearing shell can not push impaired in assembly process.
The backlash compensation circle of collapsible distortion, is filled between bearing shell and bearing shell mounting hole, and its elastic force is applied on bearing shell circumference; No matter operating temperature raises or reduces, and under the elastic force effect of backlash compensation circle, bearing shell keeps coaxial with bearing shell mounting hole all the time; Therefore, the structure of backlash compensation circle is set, as long as control the elastic force of backlash compensation circle well, just make bearing shell there is the ability of automatic centering, that is bearing bush center remains at and the supercentral ability of bearing shell mounting hole.In addition; backlash compensation circle has certain elasticity; play good cushioning effect magnetic drive pump is in service; improve the ability of the anti-vibrating and impact of bearing shell; bearing shell is played a protective role; especially the bearing shell that brittle material is made, this cushioning effect can significantly improve integrally-built impact resistance.
In the time that operating temperature raises, bearing shell and bearing support temperature distortion, bearing shell external diameter expands, and bearing shell mounting hole on bearing support shrinks, and two is superimposed, and easily and between bearing support, form larger magnitude of interference, excessive magnitude of interference easily makes bearing shell impaired to bearing shell; For avoiding this kind of situation, as preferably, the diameter of described 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 while being equivalent to maximum operation temperature.This structure, at high temperature, can not form interference fit between bearing shell and bearing support, or 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, described limit dais is 2-6, is evenly distributed on bearing shell excircle.The equally distributed structure of limit dais, can prevent that bearing shell circumference is stressed irregular and produce stress raisers phenomenons, make part that bearing shell is relevant not reason bear too high stress and deformed damaged.
As preferably, the material of described bearing shell is for being graphite or pottery or Tungsten carbite or silicon carbide.These nonmetallic material, corrosion-resistant, high temperature resistant, easily to make moulding, and there is good wear-resisting property, the bearing shell that these materials are made, in the time carrying the medium of high temperature, high burn into high pressure, has longer working life.
The size of magnetic drive pump has plurality of specifications, and bearing shell also has the plurality of specifications varying in size; As preferably, the transverse section of described backlash compensation circle is circle or ellipse or bar shaped.Transverse section is the backlash compensation circle of strip structure, has larger area of contact with bearing shell, and larger elastic force also can be provided; In practical application, can select according to concrete condition.
For further improving the concentricity of bearing shell and bearing shell mounting hole, as preferably, described bearing shell two ends are respectively provided with 1-3 backlash compensation circle.
As preferably, on described bearing shell outer surface, be circumferentially with groove, described backlash compensation circle is located in this groove.This structure, can prevent that backlash compensation circle from moving axially along bearing shell surface, and making that bearing shell two ends are stressed can disequilibrium.
As preferably, described backlash compensation circle and bearing shell are integrated the overall structure of making.This integrative-structure, makes the assembling of bearing shell easier, also more effectively prevents that backlash compensation circle from moving on bearing shell.
Therefore, the present invention has following beneficial effect:
1, on bearing shell circumference, arrange limit dais and with formation circumferentially spacing, circumferentially located by the arc surface on circumference, no matter how operating temperature changes, bearing shell all can be fixed in bearing support reliably, has effectively avoided conventional construction in the time of temperature variation, to occur that interference deficiency causes the phenomenon of bearing shell transfer.
2, between bearing shell and bearing shell mounting hole, clearance for expansion is set, clearance for expansion provides the space of expanded by heating for bearing shell and bearing support mounting hole, avoids thermal expansion distortion to form excessive pressure stress to bearing shell; Thisly establish gapped structure, make the assembling of bearing shell and change operation simpler, easily, bearing shell can not push impaired in assembly process;
3, the backlash compensation circle of collapsible distortion, in the time of the variation of operating temperature, both can make bearing shell locate from centering, again bearing shell had been played to good protective action.
Brief description of the drawings
Accompanying drawing 1 is a kind of structural representation of a kind of Magnetic Drive Pump Sliding Bearing of the present invention and backlash compensation structure thereof;
Accompanying drawing 2 is the I place enlarged diagrams in accompanying drawing 1;
Accompanying drawing 3 is the II place enlarged diagrams in 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
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment: the present invention is as shown in accompanying drawing 1, accompanying drawing 2, comprise the bearing shell 4 being sheathed on impeller shaft 8, and this bearing shell 4 is installed, is connected in the bearing support 3 of the pump housing 1, on bearing shell 4 excircles, be at least provided with one for preventing the limit dais 41 of its rotation, this limit dais 41 is platform or boss, is provided with platform or groove with limit dais 41 adaptations in the bearing shell mounting hole on bearing support 3.
As 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.
As shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, the diameter of bearing shell 4 excircles is less than the diameter of the bearing shell mounting hole on bearing support 3, makes to form clearance for expansion between bearing shell 4 and mounting hole, and clearance for expansion provides the space of expanded by heating for bearing shell 4 and mounting hole.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 while being equivalent to maximum operation temperature.
Between bearing shell 4 and bearing support 3, be provided with backlash compensation circle 7, the elastomer that this backlash compensation circle 7 is collapsible distortion, in it, outside is resisted against respectively the inwall of bearing shell 4 peripheries, bearing shell mounting hole.
The transverse section of backlash compensation circle 7 is circle or ellipse or bar shaped.
Bearing shell 4 two ends are respectively provided with 1-3 backlash compensation circle 7.On bearing shell 4 outer surfaces, be circumferentially with groove, backlash compensation circle 7 is located in this groove.Backlash compensation circle 7 and bearing shell 4 are integrated the overall structure of making.
Backlash compensation circle 7 is overall structure, around comprising on bearing shell 4 outer circumferential faces of limit dais 41; Also can be segmental structure, be only located on the circumferential surface of bearing shell 4, and do not arrange on limit dais 41, now, as the preferably plan of establishment, is that each section is located on same circumference symmetrically, thereby to ensure that the stressed harmony of bearing shell 4 keeps preferably from centering ability.
While installing and using, bearing support 3 one end are fixedly connected on the pump housing 1, and the bearing shell mounting hole two ends on bearing support 3 respectively arrange a secondary bearing shell 4, and bearing shell 4 is set on impeller shaft 8.
For being connected of bearing shell 4 and impeller shaft 8, can be bearing shell 4 and the direct contact form of impeller shaft 8, the mediate contact form of axle sleeve is also set between the two, axle sleeve is fixed on impeller shaft 8, and excircle and bearing shell 4 inner peripheral surfaces formations are slidably matched.
Claims (3)
1. a Magnetic Drive Pump Sliding Bearing, comprise the bearing shell (4) being sheathed on 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: on described bearing shell (4) excircle, be at least provided with one for preventing the limit dais (41) of its rotation, 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 bearing support (3); The diameter of described bearing shell (4) excircle is less than the diameter of the bearing shell mounting hole on bearing support (3), the diameter of bearing shell (4) excircle and bearing shell mounting hole inner circumference poor, (4) excircle of bearing shell while equaling maximum operation temperature and bearing shell mounting hole inner circumference radial heat distortion amount sum; Between bearing shell (4) and bearing support (3), be provided with backlash compensation circle (7), the elastomer that this backlash compensation circle (7) is collapsible distortion, in it, outside is resisted against respectively bearing shell (4) periphery, bearing shell mounting hole inwall, on described bearing shell (4) outer surface, be circumferentially with groove, backlash compensation circle (7) is located in this groove, and the transverse section of backlash compensation circle (7) is circle or ellipse or bar shaped; Backlash compensation circle (7) and bearing shell (4) are integrated the overall structure of making.
2. a kind of Magnetic Drive Pump Sliding Bearing according to claim 1, is characterized in that: described limit dais (41), for 1-6, is evenly distributed on bearing shell (4) excircle.
3. a kind of Magnetic Drive Pump Sliding Bearing according to claim 1 and 2, is characterized in that: described bearing shell (4) two ends are respectively provided with 2-3 backlash compensation circle (7), and the material of bearing shell (4) is graphite or pottery or Tungsten carbite or silicon carbide.
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 |
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| CN102410242A CN102410242A (en) | 2012-04-11 |
| CN102410242B true 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) |
Families Citing this family (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 |
| CN104314859B (en) * | 2014-08-27 | 2016-05-25 | 天津中环电子照明科技有限公司 | A kind of impeller localization method of miniature rotating machinery pump |
| CN106555765A (en) * | 2015-09-30 | 2017-04-05 | 杭州三花研究院有限公司 | Electric drive pump |
| CN112392759B (en) * | 2020-11-23 | 2022-06-21 | 安徽信成泵阀有限公司 | Magnetic drive pump sliding bearing and clearance compensation structure thereof |
| CN113266567B (en) * | 2021-06-18 | 2022-11-04 | 台州市浙兴真空设备制造有限公司 | Slide valve type vacuum pump |
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| IT995494B (en) * | 1972-09-26 | 1975-11-10 | Lucas Aerospace Ltd | AIR BEARING |
| EP1713159A1 (en) * | 2005-04-11 | 2006-10-18 | Askoll Holding S.r.l. | Variable speed synchronous electric motor with rotor immersed in a fluid particularly for pumps |
| JP2010007642A (en) * | 2008-06-30 | 2010-01-14 | Nidec Sankyo Corp | Pump device |
| US7780424B2 (en) * | 2008-10-21 | 2010-08-24 | Baker Hughes Incorporated | Self leveling dynamically stable radial bearing |
| JP5270329B2 (en) * | 2008-12-25 | 2013-08-21 | 株式会社荏原製作所 | Thrust slide bearing and pump equipped with the thrust slide bearing |
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| CN201090488Y (en) * | 2007-08-16 | 2008-07-23 | 上海连成（集团）有限公司 | Novel slide bearing for water pump |
| CN201250847Y (en) * | 2008-09-01 | 2009-06-03 | 潮州市汇能电机有限公司 | Radial thrust block type bearing |
| CN201363281Y (en) * | 2008-12-30 | 2009-12-16 | 上海凯泉泵业（集团）有限公司 | Water guide bearing structure for horizontal or diagonal flow pump |
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