CN105201895A - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
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- CN105201895A CN105201895A CN201510560203.0A CN201510560203A CN105201895A CN 105201895 A CN105201895 A CN 105201895A CN 201510560203 A CN201510560203 A CN 201510560203A CN 105201895 A CN105201895 A CN 105201895A
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- pump
- bearing
- impeller
- cover
- seal
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Abstract
The invention discloses a centrifugal pump comprising a pump body, an impeller, a pump cover and a pump shaft. The centrifugal pump is characterized in that an outlet flange is arranged at the top of the pump body, an inlet flange is arranged on the side wall of the pump body, the pump cover and the pump body form a sealed cavity, the impeller is arranged in the cavity, the pump shaft penetrates through the pump cover to be connected with the impeller, a mechanical seal is arranged between the pump shaft and the pump cover, the pump shaft is covered with a bearing suspension connected with the pump cover, a baffle is arranged in the bearing suspension, a front rolling bearing is arranged between a bearing and the bearing suspension, a back rolling bearing is arranged between the bearing and the baffle, a sealing ring is arranged on the contact surface of the impeller with the pump cover and the pump body, and the contact surface of the pump shaft and the impeller adopts a conical structure.
Description
Technical field
The present invention relates to pump production field, particularly a kind of centrifugal pump.
Background technique
In prior art and the following description of the present invention, centrifugal pump and impeller thereof come into question as an example.Drive about it, there is the centrifugal pump of two kinds of fundamental types.Traditional type is so-called " length couples " centrifugal pump, and wherein the axle of drive motor is couple to the axle of centrifugal pump by coupling device.Another type is so-called " closely coupling " centrifugal pump, this means that centrifugal pump and motor use identical axle and identical bearing, and nature, the latter is preferred selection in today, and this is owing to needing less parts in pump-motor combination.
Therefore, length couples centrifugal pump and has the axle be supported on himself bearing, and drive motor has the axle of self on the spring bearing of himself.Usually, the bearing of centrifugal pump has been arranged such that one in all bearings is designed to tackle thrust load, this means in practice, on the one hand, this bearing must can process thrust load, and the bearer ring of bearing on the other hand, processing thrust load to be immovably fastened on axle and in bearing case.Nature, the bearing of carrying thrust load also must carry radial load.Another bearing only carrying radial load is immovably fastened on axle, but or bearing self allow between bearer ring axial motion (such as, sliding bearing), or external bearings ring can slide axially in bearing case.
Reach is to the bearing unit with radial load, and namely thrust-bearing is the most normally formed by a pair angular contact ball bearing arranged with back-to-back structure.Replace angular contact ball bearing, also use tapered roller bearing.Typically, bearing unit is arranged near coupling device, namely near the end of the axle relative with the rotor of flowing machine.The bearing only carrying radial load typically is single ball bearing or roller bearing or sliding bearing, and is typically arranged on the axle closer to rotor.By thrust bearing assembly, the main cause be arranged to further from rotor is, by that way, the radial force affecting thrust bearing assembly is less, and by that way, this bearing so high strength is not subject to the stress that power causes in two dimensions.Therefore, be arranged to can be designed closer to the bearing of rotor and select to be used for only absorbing radial load.
CN2447239Y discusses a kind of belt drives pump, and the axle of this pump is supported on and bearing makes the bearing closer to pump impeller be the carrying ball bearing of thrust load and the bearing further from impeller is the roller bearing only carrying thrust load.This Chinese document combined axis discusses four spot contact bearings to spring bearing (that is, thrust-bearing), and this means to have an inner loop substantially, the common ball bearing of an external rings and bearing ball therebetween.Groove type in inside and outside ring becomes and makes them be essentially V-arrangement, and ball runs along the circular path on the face of v-depression thus.This structure makes it possible to this bearing to be called four spot contact bearings.But according to this Chinese document, the interior grooves of bearing is machined in axle surface, and the assembly of this Chinese bearing only allows the ball of limited quantity to be inserted between inside and outside ring, and the load carrying capacity of bearing is restricted thus.But traditional bearing arranges to have some shortcomings, and this makes the manufacture of centrifugal pump, assembling, operation and maintenance is complicated.
First, when thrust bearing assembly is in comparatively distal portion (that is, relative with rotor) of axle, heats this axle when pumping or mixed heat medium and cause this axle to expand vertically, cause the axially displaced of rotor.Particularly importantly it should be noted that in centrifugal pump, the gap between pump casing and impeller must be designed to may being shifted of the position considering impeller.
The second, depend on the requirement of the application using centrifugal pump, the load that bearing is subject to can change a lot.This means in practice, the radial direction that is subject to of centrifugal pump and/or thrust load can be the two or three times of the load that the similar pump in Another Application with same configuration is subject in some applications.Such load changes and means that the bearing with high load carrying capacity is for too heavy the pump being subject to lighter load.In other words, this bearing must be changed to mate load-up condition.But, when using angular contact ball bearing, move on to from the bearing being designed to have high load carrying capacity the reduction (assuming that the maintenance of this axle is identical) that the bearing with low load carrying capacity means size (i.e. the outer diameter of bearing and axial length).This means that pump manufacturer has two selections in practice, or be the different bearing case of different bearing mnanufacture at least two, or manufacture packing, less bearing can be assembled in the bearing case being designed to the heaviest load (that is, for having the bearing of high load carrying capacity) by this packing.Either way mean the manufacture cost of increase.
3rd, the essential structure of conventional centrifugal pump has made bearing case directly not be attached to pump casing, but has used middle cage construction.In practice, first this mean and performed two kinds of different casting operations, and secondly mean owing to there are two parts be separated, assembling spended time, and the small danger do not lined up increases.
4th, angular contact ball bearing they self there is their shortcoming, this is because, when deployed, they tend to lubricant oil to be pumped into its opposite side from the side of bearing.When two this bearings are located with back-to-back structure, especially true.The pumping of oil proposes high requirement to the shaft sealing at the side place of bearing and the circulation canal that makes oil turn back to grease chamber.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of centrifugal pump, improves the sealing of centrifugal pump, to solve the above-mentioned multinomial defect caused in prior art.
For achieving the above object, the invention provides following technological scheme: a kind of centrifugal pump, comprise the pump housing, impeller, pump cover and pump shaft, the top of the described pump housing is provided with outlet(discharge) flange, the sidewall of the pump housing is provided with suction flange, pump cover and the pump housing form seal chamber, described, impeller is arranged in cavity, described pump shaft is connected with impeller through pump cover, mechanical seal is provided with between pump shaft and pump cover, pump shaft is wrapped with bearing suspension, bearing suspension is connected with pump cover, dividing plate is provided with in bearing suspension, bearing and bearing suspension are provided with front roll bearing, rear rolling bearing is provided with between bearing and dividing plate, the surface of contact of impeller and pump cover and the pump housing is provided with seal ring, the surface of contact of pump shaft and impeller is cone structure.
Preferably, described mechanical seal comprises the seal rack being arranged on both sides, and between seal rack, side is provided with the first seal ring, the second seal ring and the 3rd seal ring, and the 3rd seal ring is Z-type structure, and the 3rd is provided with spring between seal ring and seal rack.
Preferably, the sidewall of described bearing suspension is provided with through hole between dividing plate and end.
Preferably, described bearing suspension is provided with locating cover in the inner side of dividing plate, and described pump shaft is through locating cover.
Preferably, the bottom of the described pump housing is provided with base.
Preferably, the end of described bearing suspension is provided with supporting bracket.
The beneficial effect of above technological scheme is adopted to be: the centrifugal pump of structure of the present invention, the pump shaft place of centrifugal pump is provided with bearing, by bearing suspension, bearing is fixed, prevent bearing from shaking, improve the stability of centrifugal pump, the surface of contact of impeller and pump cover and the pump housing is provided with seal ring, improve sealing, the surface of contact of pump shaft and impeller is that cone structure increases stickiness, the sidewall of bearing suspension is provided with through hole between dividing plate and end, be convenient to heat radiation, improve the life-span of pump shaft, the bottom of the described pump housing is provided with base, the end of described bearing suspension is provided with supporting bracket, ensure whole centrifugal pump stability operationally, mechanical seal is provided with between pump shaft and pump cover, improve sealing, spring is provided with between mechanical seal simultaneously, the effect of buffering is played in the process of impeller operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram of mechanical seal structure.
Wherein, 1--outlet(discharge) flange, the 2--pump housing, 3--suction flange, 4--impeller, 5--base, 6--through hole, 7--locating cover, 8--supporting bracket, 9--front roll bearing, 10--pump shaft, 11--bearing suspension, 12--rear rolling bearing, 13--pump cover, 14--seal ring, 15--mechanical seal, 16--seal rack, 17--first seal ring, 18--second seal ring, 19--the 3rd seal ring, 20--spring.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 shows the specific embodiment of the present invention: a kind of centrifugal pump, comprise the pump housing 2, impeller 4, pump cover 13 and pump shaft 10, the top of the described pump housing 2 is provided with outlet(discharge) flange 1, the sidewall of the pump housing 2 is provided with suction flange 3, pump cover 13 and the pump housing 2 form seal chamber, described, impeller 4 is arranged in cavity, described pump shaft 10 is connected with impeller 4 through pump cover 13, mechanical seal 15 is provided with between pump shaft 10 and pump cover 13, pump shaft 10 is wrapped with bearing suspension 11, bearing suspension 11 is connected with pump cover 13, dividing plate is provided with in bearing suspension 11, bearing and bearing suspension 11 are provided with front roll bearing 9, rear rolling bearing 12 is provided with between bearing and dividing plate, impeller 4 is provided with seal ring 14 with the surface of contact of pump cover 13 and the pump housing 2, pump shaft 10 is cone structure with the surface of contact of impeller 4, the sidewall of bearing suspension 11 is provided with through hole 6 between dividing plate and end, bearing suspension 11 is provided with locating cover 7 in the inner side of dividing plate, described pump shaft 10 is through locating cover 7, the bottom of the pump housing 2 is provided with base 5, the end of bearing suspension 11 is provided with supporting bracket 8.
Mechanical seal 15 comprises the seal rack 16 being arranged on both sides, and between seal rack 16, side is provided with the first seal ring 17, second seal ring 17 and the 3rd seal ring the 19, three seal ring 19 is Z-type structure, is provided with spring 20 between the 3rd seal ring 19 and seal rack 16.
The centrifugal pump of structure of the present invention, the pump shaft place of centrifugal pump is provided with bearing, by bearing suspension, bearing is fixed, prevent bearing from shaking, improve the stability of centrifugal pump, the surface of contact of impeller and pump cover and the pump housing is provided with seal ring, improve sealing, the surface of contact of pump shaft and impeller is that cone structure increases stickiness, the sidewall of bearing suspension is provided with through hole between dividing plate and end, be convenient to heat radiation, improve the life-span of pump shaft, the bottom of the described pump housing is provided with base, the end of described bearing suspension is provided with supporting bracket, ensure whole centrifugal pump stability operationally, mechanical seal is provided with between pump shaft and pump cover, improve sealing, spring is provided with between mechanical seal simultaneously, the effect of buffering is played in the process of impeller operation.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (6)
1. a centrifugal pump, comprise the pump housing, impeller, pump cover and pump shaft, it is characterized in that, the top of the described pump housing is provided with outlet(discharge) flange, the sidewall of the pump housing is provided with suction flange, pump cover and the pump housing form seal chamber, described, impeller is arranged in cavity, described pump shaft is connected with impeller through pump cover, mechanical seal is provided with between pump shaft and pump cover, pump shaft is wrapped with bearing suspension, bearing suspension is connected with pump cover, dividing plate is provided with in bearing suspension, bearing and bearing suspension are provided with front roll bearing, rear rolling bearing is provided with between bearing and dividing plate, the surface of contact of impeller and pump cover and the pump housing is provided with seal ring, the surface of contact of pump shaft and impeller is cone structure.
2. centrifugal pump according to claim 1, it is characterized in that, described mechanical seal comprises the seal rack being arranged on both sides, and between seal rack, side is provided with the first seal ring, the second seal ring and the 3rd seal ring, 3rd seal ring is Z-type structure, and the 3rd is provided with spring between seal ring and seal rack.
3. centrifugal pump according to claim 1, is characterized in that, the sidewall of described bearing suspension is provided with through hole between dividing plate and end.
4. centrifugal pump according to claim 1, is characterized in that, described bearing suspension is provided with locating cover in the inner side of dividing plate, and described pump shaft is through locating cover.
5. centrifugal pump according to claim 1, is characterized in that, the bottom of the described pump housing is provided with base.
6. centrifugal pump according to claim 1, is characterized in that, the end of described bearing suspension is provided with supporting bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510560203.0A CN105201895A (en) | 2015-09-06 | 2015-09-06 | Centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510560203.0A CN105201895A (en) | 2015-09-06 | 2015-09-06 | Centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105201895A true CN105201895A (en) | 2015-12-30 |
Family
ID=54949773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510560203.0A Pending CN105201895A (en) | 2015-09-06 | 2015-09-06 | Centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105201895A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939896A (en) * | 2017-05-04 | 2017-07-11 | 项光辉 | A kind of digital metering non-return centrifugal pump of high leakproofness |
| CN106949066A (en) * | 2017-05-11 | 2017-07-14 | 江苏斯别特制泵有限公司 | A kind of high-power centrifugal pump body |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB337683A (en) * | 1930-01-14 | 1930-11-06 | Albert Saunders | Improvements in and relating to centrifugal pumps |
| GB1451968A (en) * | 1972-11-06 | 1976-10-06 | Klaus F | Centrifugal pumps apparatus for converting information present in digital form to a form capable of being perceived by people |
| CN202732359U (en) * | 2012-06-25 | 2013-02-13 | 王友宏 | Sludge pump |
| CN202811527U (en) * | 2012-09-13 | 2013-03-20 | 芜湖长江泵业有限公司 | Suction-type centrifugal pump |
| CN203430843U (en) * | 2013-06-20 | 2014-02-12 | 自贡东联泵阀制造有限公司 | Three-stage sealed type special coal-washing pump |
| CN204419683U (en) * | 2015-01-26 | 2015-06-24 | 四川大禹机械密封件制造有限公司 | A kind of marine mechanical sealing device with protective gear |
-
2015
- 2015-09-06 CN CN201510560203.0A patent/CN105201895A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB337683A (en) * | 1930-01-14 | 1930-11-06 | Albert Saunders | Improvements in and relating to centrifugal pumps |
| GB1451968A (en) * | 1972-11-06 | 1976-10-06 | Klaus F | Centrifugal pumps apparatus for converting information present in digital form to a form capable of being perceived by people |
| CN202732359U (en) * | 2012-06-25 | 2013-02-13 | 王友宏 | Sludge pump |
| CN202811527U (en) * | 2012-09-13 | 2013-03-20 | 芜湖长江泵业有限公司 | Suction-type centrifugal pump |
| CN203430843U (en) * | 2013-06-20 | 2014-02-12 | 自贡东联泵阀制造有限公司 | Three-stage sealed type special coal-washing pump |
| CN204419683U (en) * | 2015-01-26 | 2015-06-24 | 四川大禹机械密封件制造有限公司 | A kind of marine mechanical sealing device with protective gear |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939896A (en) * | 2017-05-04 | 2017-07-11 | 项光辉 | A kind of digital metering non-return centrifugal pump of high leakproofness |
| CN106949066A (en) * | 2017-05-11 | 2017-07-14 | 江苏斯别特制泵有限公司 | A kind of high-power centrifugal pump body |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |
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| RJ01 | Rejection of invention patent application after publication |