CN203272216U - Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system - Google Patents
Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system Download PDFInfo
- Publication number
- CN203272216U CN203272216U CN 201320302545 CN201320302545U CN203272216U CN 203272216 U CN203272216 U CN 203272216U CN 201320302545 CN201320302545 CN 201320302545 CN 201320302545 U CN201320302545 U CN 201320302545U CN 203272216 U CN203272216 U CN 203272216U
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- CN
- China
- Prior art keywords
- static
- main pump
- lubricating oil
- bezel ring
- labyrinth seal
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- Expired - Fee Related
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Abstract
The utility model relates to a mechanical labyrinth seal of a nuclear main pump bidirectional thrust bearing circulation lubricating oil system. According to the structure, a rotary sealing sleeve is fixed on a motor shaft, a stationary cover ring is fixed on an upper bearing housing, and a mechanical labyrinth seal structure is formed. When operation is stable, leakage of circulation lubricating oil is prevented, and the situation that the circulation lubricating oil dissipates to pollute the environment after gasifying due to the high temperature can also be avoided. The mechanical labyrinth seal of the nuclear main pump bidirectional thrust bearing circulation lubricating oil system is simple in structure, convenient to disassemble and assemble, good in applicability, and applicable to sealing of bidirectional thrust bearing circulation lubricating oil systems of nuclear main pump units with different scales.
Description
Technical field: the utility model relates to the labyrinth seal of core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula.
Background technique: the labyrinth seal of core main pump doubledirection thrust bearing recycle oil system mechanics formula is that the core main pump is lubricated, the cool cycles lubricating oil system also keeps one of key link of stability operation, is directly connected to the safe and reliable operation of core main pump in the power station.If oil leak occurs in sealing, leakage rate acquires a certain degree, and will cause the reactor shutdown, brings huge economic loss to the power station, and oil gas directly pollutes environment in reactor, very easily the potential safety hazard such as initiation fire.The exploitation of main pump doubledirection thrust bearing recycle oil system mechanics formula labyrinth seal will provide powerful guarantee for the production domesticization of doubledirection thrust bearing.
Summary of the invention:
The purpose of this utility model be disclose a kind of contactless, easy accessibility, core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula labyrinth seal applied widely.The technical solution of the utility model is: the labyrinth seal of a kind of core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula, rotary seal sleeve (3) forms the mechanical type labyrinth seal with static bezel ring, (4), rotary seal sleeve (3) by socket head screw (5) being incorporated on motor shaft (1), static bezel ring, (4) is installed on thrust-bearing chamber (2), and by hexagon head bolt (6) tightly, form the seal action gap after rotary seal sleeve (3) and static bezel ring, (4) assembling.Rotary seal sleeve (3) outer surface built-up welding Babbitt increases wear resistance; Static bezel ring, (4) is offered spreading grooves (7), reduce medium kinetic energy, static bezel ring, (4) internal surface offers 36 even distribution levoform otch (8), lead of screw 445mm, otch (8) offer and consider as far as possible periodically to grind under the sealing medium rotation status inhibition effect and medium along the otch backflow effeet; According to main pump rotor radial vibration actual conditions, rotary seal sleeve (3) and static bezel ring, (4) fit up gap reservation 0.3mm.
The utility model can be used for the sealing of the different heap type core main pump doubledirection thrust bearing circulating lubrication oil systems such as ACP1000MW, CPR1000MW.
The beneficial effects of the utility model are:
(1) the utility model forms the mechanical type labyrinth seal by rotary seal sleeve and static bezel ring,, after lubricant oil passes through thrust-bearing chamber strike the oil equipment pressurization, flow into the labyrinth seal cavity after lubricated, cooling bearing indoor assembly, and press down oil sump tank in the back pressure effect of labyrinth seal, form oil circulation system, finally realize the controlled low pressure " zero leakage " of lubricant oil.
(2) the mechanical type labyrinth seal is comprised of rotary seal sleeve and static bezel ring,, when the rotary seal sleeve rotates with motor shaft, form reverse extrusion with the left-handed thread blade of static bezel ring,, the oil gas that enters in Seal cage is pressed along with the variation of seal clearance is lost gradually.
(3) on structure, rotary seal sleeve and static bezel ring, gap vibrate much larger than rotor radial, avoid dry friction occurs and working life of reducing sealing.
(4) rotary seal sleeve outer surface heap babbitlining, improve the sealing surface wear resistance.
The utility model working principle: structural feature of the present utility model is contactless, and rotary seal sleeve outer surface built-up welding Babbitt increases wear resistance; Static slip ring internal surface is offered 36 even distribution levoform otch.Rotation the offering of otch taken into full account lubricant oil and has been in frictional resistance effect, a fluid stream blockage effect, thermomechanical effect and pumping effect under liquid state, gaseous state two-phase operating mode at 80 ° of C.Under operating conditions, the lubricant oil (temperature is 80 ° of C approximately, and pressure is 1.5bar approximately, and flow is 0.45L/s approximately) that flows out after cooling, lubricating bearings chamber interior assembly enters seal chamber, through the labyrinth seal step-down, gas-liquid mixed oil gas returns to the bearing lubrication oil circulating system with zero leakage at last.
Description of drawings
Fig. 1 is the static bezel ring, sectional arrangement drawing of core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula labyrinth seal
Fig. 2 is core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula labyrinth seal rotary seal sleeve sectional arrangement drawing
Fig. 3 is rotary seal sleeve and static bezel ring, fit up gap partial enlarged drawing
Fig. 4 is rotary seal sleeve sectional view
Fig. 5 is static bezel ring, sectional view
Embodiment
As shown in Figure 1, the labyrinth seal of a kind of core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula, rotary seal sleeve 3 forms the mechanical type labyrinth seal with static bezel ring, 4, as shown in Figure 2, being incorporated on motor shaft 1, static bezel ring, 4 is installed on thrust-bearing chamber 2 rotary seal sleeve 3 by socket head screw 5, and by hexagon head bolt 6 tight, as shown in Figure 3, formation seal action gap after rotary seal sleeve 3 assembles with static bezel ring, 4.As shown in Figure 4, rotary seal sleeve 3 outer surface built-up welding Babbitts increase wear resistance; Static bezel ring, 4 is offered spreading grooves 7, reduce medium kinetic energy, as shown in Figure 5, static bezel ring, 4 internal surfaces offer 36 even distribution levoform otch 8, lead of screw 445mm, otch 8 offer and consider as far as possible periodically to grind under the sealing medium rotation status inhibition effect and medium along the otch backflow effeet; According to main pump rotor radial vibration actual conditions, rotary seal sleeve 3 and static bezel ring, 4 fit up gaps reservation 0.3mm.
The utility model spiral chute is opened on static bezel ring,, and axle sleeve is smooth, and helix length is short, is sealed with larger difference with conventional helical; By the checking of core main pump full flow test, oil seal is stable, and test result is desirable, neither exists oil to leak, also not visible liquefaction oil droplet;
The utility model is contactless, and easy accessibility is applied widely, can be used for the different heap type core main pumps such as ACP1000MW, CPR1000MW, and is convenient to safeguard, reliable, the safe handling degree is high.
Claims (1)
1. core main pump doubledirection thrust bearing circulating lubricating oil system mechanics formula labyrinth seal, it is characterized in that: rotary seal sleeve (3) forms the mechanical type labyrinth seal with static bezel ring, (4), rotary seal sleeve (3) by socket head screw (5) being incorporated on motor shaft (1), static bezel ring, (4) is installed on thrust-bearing chamber (2), and by hexagon head bolt (6) tightly, form the seal action gap after rotary seal sleeve (3) and static bezel ring, (4) assembling.Rotary seal sleeve (3) outer surface built-up welding Babbitt increases wear resistance; Static bezel ring, (4) is offered spreading grooves (7), reduce medium kinetic energy, static bezel ring, (4) internal surface offers 36 even distribution levoform otch (8), lead of screw 445mm, otch (8) offer and consider as far as possible periodically to grind under the sealing medium rotation status inhibition effect and medium along the otch backflow effeet; According to main pump rotor radial vibration actual conditions, rotary seal sleeve (3) and static bezel ring, (4) fit up gap reservation 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320302545 CN203272216U (en) | 2013-05-30 | 2013-05-30 | Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320302545 CN203272216U (en) | 2013-05-30 | 2013-05-30 | Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203272216U true CN203272216U (en) | 2013-11-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320302545 Expired - Fee Related CN203272216U (en) | 2013-05-30 | 2013-05-30 | Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203272216U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593938A (en) * | 2016-12-16 | 2017-04-26 | 哈尔滨电气动力装备有限公司 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
| CN108760156A (en) * | 2018-07-25 | 2018-11-06 | 哈尔滨电气动力装备有限公司 | The experimental rig of core main pump self-loopa oil pump and oily mechanical sealing performance |
| CN112139986A (en) * | 2020-09-29 | 2020-12-29 | 宁波贝仕利机电技术有限公司 | High leakproofness electricity main shaft |
-
2013
- 2013-05-30 CN CN 201320302545 patent/CN203272216U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593938A (en) * | 2016-12-16 | 2017-04-26 | 哈尔滨电气动力装备有限公司 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
| CN108760156A (en) * | 2018-07-25 | 2018-11-06 | 哈尔滨电气动力装备有限公司 | The experimental rig of core main pump self-loopa oil pump and oily mechanical sealing performance |
| CN108760156B (en) * | 2018-07-25 | 2023-12-26 | 哈尔滨电气动力装备有限公司 | Nuclear self-circulation oil pump and oil mechanical sealing performance test device for main pump |
| CN112139986A (en) * | 2020-09-29 | 2020-12-29 | 宁波贝仕利机电技术有限公司 | High leakproofness electricity main shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |