CN202597198U - Bearing oil seal mechanism for coolant drain tank pump - Google Patents
Bearing oil seal mechanism for coolant drain tank pump Download PDFInfo
- Publication number
- CN202597198U CN202597198U CN 201220118788 CN201220118788U CN202597198U CN 202597198 U CN202597198 U CN 202597198U CN 201220118788 CN201220118788 CN 201220118788 CN 201220118788 U CN201220118788 U CN 201220118788U CN 202597198 U CN202597198 U CN 202597198U
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- China
- Prior art keywords
- bearing
- oil seal
- drain tank
- ring
- pump
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- 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 oil seal mechanism for a coolant drain tank pump, wherein the bearing oil seal mechanism comprises a bearing body, a bearing gland connected to the upper end of the bearing body and a skeleton oil seal installed in the sealing cavity of the bearing body, the inside diameter of the bearing gland is in clearance fit with the diameter of a pump shaft, and a labyrinth type sealing groove is arranged on the inner circumferential surface of the bearing gland; the skeleton oil seal comprises an L-shaped metal skeleton, a rubber body and a spring ring, the spring ring is provided with an inner ring, an outer ring and a bottom wall connecting the inner ring with the outer ring, the cross section of the spring ring is U-shaped, the outer ring and the bottom wall are wrapped at the periphery of the metal skeleton, the inner ring is a sealing lip, and the spring ring is clamped on the outer circumferential surface of the sealing lip. The bearing oil seal mechanism for coolant drain tank pump disclosed by the utility model can prevent the medium in the holding cavity from leaking and isolate the invasion of dirt, dust, water and impurities outside the holding cavity, and also guarantee minimal mechanical friction force on the pump shaft without affecting the efficiency of the pump.
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 enclosure mechanism 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.
What existing freezing mixture drain tank pump adopted is vertical structure; Lubricating grease in temperature rising bearing body cavity may be thinning; Lubricating grease can be leaked in the mechanical seal along pump shaft, causes the job insecurity of mechanical seal, also must prevent lubricating grease in addition because pressure overflows in the bearing body cavity.Oil sealing is to adopt common wool felt sealing on the bearing at present, guaranteeing under the good situation of sealing effect pump shaft also to be produced mechanical friction power, therefore can influence the efficient of pump.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology; A kind of bearing enclosure mechanism that is used for freezing mixture drain tank pump is provided; Its good seal performance and guaranteeing under the good situation of sealing effect mechanical friction power also to be accomplished minimum can not influence the efficient of pump.
The technological scheme that realizes above-mentioned purpose is: a kind of bearing enclosure mechanism that is used for freezing mixture drain tank pump, and comprise bearing support, be connected the bearing gland of bearing support upper end and be installed in the outside framework oil seal in the Seal cage of bearing support, wherein,
The internal diameter of said bearing gland and the diameter of pump shaft are Spielpassung, and the labyrinth sealing groove is set on the inner peripheral surface of bearing gland;
Said outside framework oil seal comprises L shaped metal frame, rubber body and spring ring; Said rubber body has the diapire and the cross section that encircle in interior ring, outer shroud and the connection with outer shroud and takes the shape of the letter U; Outer shroud and diapire are coated on the periphery of said metal frame; Interior ring is sealing lip, and said spring ring is installed on the outer circumferential face of said sealing lip.
The above-mentioned bearing enclosure mechanism that is used for freezing mixture drain tank pump, wherein, the gap between the internal diameter of said bearing gland and the diameter of said pump shaft is 0.24～0.26mm.
The above-mentioned bearing enclosure mechanism that is used for freezing mixture drain tank pump, wherein, the interior ring of said rubber body is the hypotenuse that tilts to the inside.
The above-mentioned bearing enclosure mechanism that is used for freezing mixture drain tank pump, wherein, the material of said rubber body is an ethylene propylene diene rubber.
The technological scheme of the bearing enclosure mechanism that is used for freezing mixture drain tank pump of the utility model; Adopt obstructed sealing means up and down, last oil sealing is adopted as contactless labyrinth seal, promptly in the inner peripheral surface and the pump shaft Spielpassung of bearing gland and the labyrinth sealing groove is set; Can increase the leakage damping; Prevent that effectively lubricating grease from leaking outside, can also reduce and pump shaft between friction, prevent that friction from generating more heat.Following oil sealing adopts the contact-type outside framework oil seal, and prevent the interior dielectric leakage of bearing bore and separate the outer dirt of bearing bore, dust, water and impurity are invaded, so sealability is better.
Description of drawings
Fig. 1 is the structural representation of the bearing enclosure mechanism that is used for freezing mixture drain tank pump of the utility model.
Embodiment
In order to understand the technological scheme of the utility model better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1, a kind of bearing enclosure mechanism that is used for freezing mixture drain tank pump of the utility model comprises bearing support 1, is connected the bearing gland 2 of bearing support 1 upper end and is installed in the outside framework oil seal 3 in the Seal cage of bearing support 1, wherein:
The inner chamber of bearing support 1 is up big and down small stepped shaft cylndrical surface, and the top inner chamber of this bearing support 1 is the bearing bore that is used to hold bearing 4, and lower lumen is the Seal cage that is used to hold outside framework oil seal 3;
Gap L between the diameter of the internal diameter of bearing gland 2 and pump shaft 5=0.24～0.26mm, can reduce and pump shaft 6 between friction, prevent that friction from generating more heat;
Outside framework oil seal 3 comprises L shaped metal frame (not shown), rubber body 31 and spring ring 32; The material of rubber body 31 is the ethylene propylene diene rubber of ability irradiation; The interior ring 311 of ring 311, outer shroud 312 and connection took the shape of the letter U with the diapire and the cross section of outer shroud 312 in rubber body 31 had; Outer shroud 312 and diapire are coated on the periphery of metal frame, and interior ring 311 tilts to the inside and as sealing lip, spring ring 32 is installed on the outer circumferential face of sealing lip.
A kind of bearing enclosure mechanism that is used for freezing mixture drain tank pump of the utility model, when the temperature rising, the thinning one side of lubricating grease meeting in the bearing bore produces axial flow and drains in the machine seal apparatus; On the other hand can be owing to pressure overflows bearing gland 2; Mazy type maze trough 20 tortuous circuitous gaps through bearing gland 2 stop, reduce pressure because multichannel is multiple, and leakage rate is effectively suppressed; Leakage rate is minimum, has effectively guaranteed the normal use of bearing 4.And external dust and other impurities will stop through the multiple of labyrinth sealing groove 20 on the bearing gland 2 equally, the trend that has stoped dust and other impurities to get into bearing bore.And be installed in the Seal cage of bearing support 1 outside framework oil seal 3 since sealing lip be arranged to hypotenuse and the spring ring effect on the sealing lip arranged; Make sealing lip can be fitted on the pump shaft 5 fully; Can prevent in the bearing bore of bearing support 1 dielectric leakage with separate the outer dirt of bearing bore; Dust, water and impurity are invaded.The oil sealing outer layer rubber has the effect of anti-pressure and abrasion-proof, anti-oil and water most, makes the oil sealing longer service life, and the wearing and tearing of minimizing and pump shaft 5 reduce the wastage.Metal frame in this outside framework oil seal plays the setting effect, makes rubber body aging for a long time, and through in rubber, being surrounded by metal frame, has slowed down the deformation time of rubber body.
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. bearing enclosure mechanism that is used for freezing mixture drain tank pump comprises bearing support, is connected the bearing gland of bearing support upper end and is installed in the outside framework oil seal in the Seal cage of bearing support, it is characterized in that,
The internal diameter of said bearing gland and the diameter of pump shaft are Spielpassung, and the labyrinth sealing groove is set on the inner peripheral surface of bearing gland;
Said outside framework oil seal comprises L shaped metal frame, rubber body and spring ring; Said rubber body has the diapire and the cross section that encircle in interior ring, outer shroud and the connection with outer shroud and takes the shape of the letter U; Outer shroud and diapire are coated on the periphery of said metal frame; Interior ring is sealing lip, and said spring ring is installed on the outer circumferential face of said sealing lip.
2. the bearing enclosure mechanism that is used for freezing mixture drain tank pump according to claim 1 is characterized in that the gap between the internal diameter of said bearing gland and the diameter of said pump shaft is 0.24～0.26mm.
3. the bearing enclosure mechanism that is used for freezing mixture drain tank pump according to claim 1 is characterized in that, the interior ring of said rubber body is the hypotenuse that tilts to the inside.
4. according to claim 1 or the 3 described bearing enclosure mechanisms that are used for freezing mixture drain tank pump, it is characterized in that the material of said rubber body is an ethylene propylene diene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118788 CN202597198U (en) | 2012-03-27 | 2012-03-27 | Bearing oil seal mechanism for coolant drain tank pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118788 CN202597198U (en) | 2012-03-27 | 2012-03-27 | Bearing oil seal mechanism for coolant drain tank pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597198U true CN202597198U (en) | 2012-12-12 |
Family
ID=47314745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220118788 Expired - Lifetime CN202597198U (en) | 2012-03-27 | 2012-03-27 | Bearing oil seal mechanism for coolant drain tank pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597198U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606516A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Bearing oil seal mechanism for coolant drain tank pump |
-
2012
- 2012-03-27 CN CN 201220118788 patent/CN202597198U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606516A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Bearing oil seal mechanism 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 |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |