CN202597184U - Bearing part for coolant drain tank pump - Google Patents
Bearing part for coolant drain tank pump Download PDFInfo
- Publication number
- CN202597184U CN202597184U CN 201220118786 CN201220118786U CN202597184U CN 202597184 U CN202597184 U CN 202597184U CN 201220118786 CN201220118786 CN 201220118786 CN 201220118786 U CN201220118786 U CN 201220118786U CN 202597184 U CN202597184 U CN 202597184U
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- CN
- China
- Prior art keywords
- bearing
- pump
- drain tank
- chamber
- freezing mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a bearing part for a coolant drain tank pump, which comprises an upper end bearing and a lower end bearing, wherein the upper end bearing is arranged at the upper part of a pump shaft, the lower end bearing is arranged at the lower part of the pump shaft, the upper end bearing is a opposite-angular contact bearing and is arranged in an inner cavity of a bearing body in a back-to-back way, the lower end bearing is a guide bearing which is arranged in an inner cavity of a pump body, the guide bearing comprises a metal outer cover and a sliding lining which is embedded in an inner cavity of the metal outer cover in an interference fit way, a cover plate is arranged on the upper end of the metal outer cover, a plurality of installing holes are uniformly formed in the cover plate, and the sliding lining is made of engineering rubber. According to the bearing part for the coolant drain tank pump, radial force and axial force of a rotor part can be well balanced, and the structure of a pump group can be relatively simple.
Description
Technical field
The utility model relates to a kind of reactor with freezing mixture drain tank pump, is specifically related to a kind of bearing part that is used for freezing mixture drain tank pump.
Background technique
The function of reactor coolant drain tank pump (abbreviation main pump) is to make freezing mixture form forced circulation, thereby is sent to steam generator to the heat energy that produces in the reactor, to produce steam, the driving steam turbine acting.Basic demand to it is:
1) can under the unmanned maintenance condition, work safely and reliably for a long time; Be convenient to maintenance, auxiliary system is simple;
2) Runner assembly should be able to provide enough rotary inertias, so that under the station blackout situation, utilizes the running down of main pump that enough flows are provided, and makes reactor core obtain suitable cooling;
3) to lack with the leakage rate of radioactive freezing mixture.
Existing nuclear power plant reactor freezing mixture drain tank pump is a vertical structure; Rotor part comprises pump shaft and the impeller that is installed in the pump shaft lower end; The weight of rotor part is the principal element that constitutes axial force; And the generation of radial force is the moment of pump in startup and shutdown, makes pump shaft and impeller can produce rigid deformation.
Present freezing mixture drain tank pump adopts a deep groove ball bearing and a biserial angular contact ball bearing to come the bear rotor parts on the top of pump shaft axial force; So complex structure, and bearing of radial force is to adopt guide bearing in the bottom of pump shaft, this guide bearing is only made by a kind of tetrafluoro rubber material; Because impeller is installed in the lower end of pump shaft; Therefore to radially wobble amplitude bigger in the bottom of pump shaft, thus very fast to the wearing and tearing of guide bearing, if things go on like this not only do not have the effect of bearing radial force; Wearing and tearing between impeller and the seal ring are also strengthened, and then the leakage rate of pumping chamber has also been strengthened.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology, a kind of bearing part that is used for freezing mixture drain tank pump to be provided, and it can make the radial force of rotor part and axial force all obtain good balance, and makes the structure of pump group simpler.
The technological scheme that realizes above-mentioned purpose is: a kind of bearing part that is used for freezing mixture drain tank pump; Comprise upper end bearing that is installed in pump shaft top and the bottom end bearing that is installed in the pump shaft bottom; Wherein, said upper end bearing is a pair of angular contact ball bearing and leans against in the inner chamber that is installed in bearing support privately; Said bottom end bearing is a guide bearing and is installed in the inner chamber of the pump housing; This guide bearing is inlaid in the slide bushing in the inner chamber of metal-coating with comprising metal-coating and interference fit; The upper end of said metal-coating has cover plate; Be provided with some mounting holes on this cover plate in uniform way, the material of said slide bushing is an engineering rubber.
The above-mentioned bearing part that is used for freezing mixture drain tank pump wherein, also is provided with the axle sleeve that is solidly set on the pump shaft between said pump shaft and the said guide bearing, is Spielpassung between the internal diameter of the slide bushing of said guide bearing and the external diameter of said axle sleeve.
The above-mentioned bearing part that is used for freezing mixture drain tank pump; Wherein, The inner chamber of said bearing support comprises bearing bore and the oil sealing chamber of bottom and the big up and small down one-level stepped shaft cylindrical cavity on top, and said upper end bearing is installed in the said bearing bore also fastening through locking nut.
The above-mentioned bearing part that is used for freezing mixture drain tank pump; Wherein, The inner chamber of the said pump housing comprise the bottom pumping chamber, middle part closed chamber and top bearing chamber and be up-small and down-big secondary stepped shaft cylindrical cavity, said guide bearing be installed in the said bearing chamber and through some screw on the said pump housing.
The technological scheme of the bearing part that is used for freezing mixture drain tank pump of the utility model; The radial force that the guide bearing that bottom end bearing adopts two kinds of materials to process comes the bear rotor parts; The upper end bearing adopts a pair of angular contact ball bearing of installing back-to-back to come the axial force and the radial force of bearing remnants of balancing rotor parts, and remaining axial force is to be born by high-intensity bearing support.The bearing part that is used for freezing mixture drain tank pump of the utility model makes the radial force of entire pump and axial force all obtain good balance, and sound construction also makes the structure of pump group simpler.
Description of drawings
Fig. 1 is the structural representation of the bearing part that is used for freezing mixture drain tank pump of the utility model.
Embodiment
See also Fig. 1, a kind of bearing part that is used for freezing mixture drain tank pump of the utility model comprises pump shaft 1, upper end bearing 2, bearing support 3, bottom end bearing 4 and the pump housing 5, wherein:
The inner chamber of bearing support 3 comprises bearing bore and the oil sealing chamber of bottom and the big up and small down one-level stepped shaft cylindrical cavity on top; The oil sealing chamber is used to install outside framework oil seal 6;
The inner chamber of the pump housing 5 comprise the bottom pumping chamber, middle part closed chamber and top bearing chamber and be up-small and down-big secondary stepped shaft cylindrical cavity, pumping chamber is used to hold impeller 7, closed chamber is used to install seal ring 8;
Pump shaft 1 overlaps an axle sleeve 9 admittedly at the position of the bearing chamber that is positioned at the pump housing 5, and this axle sleeve 9 is that hot jacket is being fixed on the pump shaft 1 on the pump shaft 1 and through the impeller 7 and the shaft shoulder;
Upper end bearing 2 is used for the axial force of bear rotor parts; This upper end bearing 2 is made up of a pair of angular contact ball bearing; This a pair of angular contact ball bearing leans against the top that is installed in pump shaft 1 privately and is arranged in the bearing bore of bearing support 3, and this a pair of angular contact ball bearing is fastening through locking nut 20;
Bottom end bearing 4 is used for the radial force of bear rotor parts, this bottom end bearing 4 be a guide bearing and Spielpassung be installed on the axle sleeve 9; This guide bearing comprises metal-coating 41 and slide bushing 42; The material of this slide bushing 42 be engineering rubber and interference fit be inlaid in the inner chamber of metal-coating 41; The upper end of metal-coating 41 has cover plate, is provided with some mounting holes on this cover plate in uniform way, and this guide bearing is fixed on the pump housing 5 through some screws 40.
Gap between the external diameter of internal diameter and axle sleeve 9 through control slide bushing 42; Can control the amplitude that radially wobble of rotor part in the moment that starts and shut down; And then can dwindle the gap between impeller 7 and the seal ring 8; Reduce the wearing and tearing of seal ring 8, make seal ring 8 obtain the longer life-span and reduce the leakage rate of pumping chamber.
The bearing part that is used for freezing mixture drain tank pump of the utility model; Because the slide bushing 42 of guide bearing is the WR300 engineering rubber that adopts U.S. Greene Tweed company, this project rubber is that a kind of long carbon fiber adds polyether-ether-ketone resin to strengthen pressing mold made.Polyether-ether-ketone resin has added intensity, stability and the thermal diffusivity of having strengthened material behind the long carbon fiber; And the thermoplastic engineering plastic that has surmounted other kind; The wear resistance of slide bushing 42 is strengthened; Pump is in operation can not take place seize to cause the phenomenon of pump shaft fracture, but bearing radial force well.Guide bearing also adopts the branch body structure, after slide bushing 42 wearing and tearing, can be convenient for changing.Adopt a pair of angular contact ball bearing of installing back-to-back as the upper end bearing, axial force that can the bear rotor parts can make the designs simplification of pump group.Because guide bearing can not bear whole radial forces sometimes, the upper end bearing can also bear remaining radial force.Axle sleeve 9 also can avoid pump shaft 1 directly relative with guide bearing in addition, plays the effect of protection pump shaft 1.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not with the qualification of doing the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model the above embodiment's variation, modification.
Claims (4)
1. a bearing part that is used for freezing mixture drain tank pump comprises it is characterized in that upper end bearing that is installed in pump shaft top and the bottom end bearing that is installed in the pump shaft bottom,
Said upper end bearing is a pair of angular contact ball bearing and leans against in the inner chamber that is installed in bearing support privately;
Said bottom end bearing is a guide bearing and is installed in the inner chamber of the pump housing; This guide bearing is inlaid in the slide bushing in the inner chamber of metal-coating with comprising metal-coating and interference fit; The upper end of said metal-coating has cover plate; Be provided with some mounting holes on this cover plate in uniform way, the material of said slide bushing is an engineering rubber.
2. the bearing part that is used for freezing mixture drain tank pump according to claim 1; It is characterized in that; Also being provided with the axle sleeve that is solidly set on the pump shaft between said pump shaft and the said guide bearing, is Spielpassung between the internal diameter of the slide bushing of said guide bearing and the external diameter of said axle sleeve.
3. the bearing part that is used for freezing mixture drain tank pump according to claim 1; It is characterized in that; The inner chamber of said bearing support comprises bearing bore and the oil sealing chamber of bottom and the big up and small down one-level stepped shaft cylindrical cavity on top, and said upper end bearing is installed in the said bearing bore also fastening through locking nut.
4. the bearing part that is used for freezing mixture drain tank pump according to claim 1; It is characterized in that; The inner chamber of the said pump housing comprise the bottom pumping chamber, middle part closed chamber and top bearing chamber and be up-small and down-big secondary stepped shaft cylindrical cavity, said guide bearing be installed in the said bearing chamber and through some screw on the said pump housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118786 CN202597184U (en) | 2012-03-27 | 2012-03-27 | Bearing part for coolant drain tank pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118786 CN202597184U (en) | 2012-03-27 | 2012-03-27 | Bearing part for coolant drain tank pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597184U true CN202597184U (en) | 2012-12-12 |
Family
ID=47314731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220118786 Expired - Lifetime CN202597184U (en) | 2012-03-27 | 2012-03-27 | Bearing part for coolant drain tank pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597184U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606514A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Bearing component for coolant drain tank pump |
-
2012
- 2012-03-27 CN CN 201220118786 patent/CN202597184U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606514A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Bearing component for coolant drain tank pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |