CN201560928U - Oil cooler for bearing of coolant pump of reactor core - Google Patents
Oil cooler for bearing of coolant pump of reactor core Download PDFInfo
- Publication number
- CN201560928U CN201560928U CN200920134185XU CN200920134185U CN201560928U CN 201560928 U CN201560928 U CN 201560928U CN 200920134185X U CN200920134185X U CN 200920134185XU CN 200920134185 U CN200920134185 U CN 200920134185U CN 201560928 U CN201560928 U CN 201560928U
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- CN
- China
- Prior art keywords
- peep hole
- oil cooler
- oil
- middle splint
- reactor core
- 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 provides an oil cooler for bearing of coolant pump of reactor core, which comprises a pipe bundle, a middle housing flange, a middle splint and a lower housing flange. A first clearance for sealing the cooling oil is provided between the pipe bundle and the middle housing flange. A second clearance for sealing the cooling water is provided between the pipe bundle and the lower housing flange. A first sealing ring is provided between the middle housing flange and the middle splint. A second sealing ring is provided between the lower housing flange and the middle splint. An observation hole is provided on the middle splint. A plug member is sealed at the outer port of the observation hole. After the plug member is sealed at the port of the observation hole, the cooling oil in the first clearance flows into the observation hole from the first sealing ring. Because of the blocking function of the plug member, the cooling oil retains in the observation hole for preventing the overflowing from the observation hole to outside of the oil cooler thereby effectively preventing the leakage of oil cooler, ensuring the safe and normal operation of the device, and preventing large economic loss which may be caused by the stoppage because of oil leakage defect.
Description
Technical field
The utility model belongs to the nuclear power station motor device, relates in particular to a kind of reactor core coolant pump bearing oil cooler.
Background technique
Nuclear power station reactor core coolant pump motor bearings consists of the following components: a combined bidirectional Charles Kingsbury type thrust-bearing and upper and lower two radial bearings.Wherein the motor upper bearing (metal) by a cover up and down thrust bearing shoe valve assembly and 8 blocks of lining Babbitts carbon steel radially bearing shell constitute, cool off with lubricated by the lubricant oil in upper bearing (metal) grease chamber and the oil cooler.Normal operation period drives lubricant oil by the viscosity oil pump and circulates between upper bearing (metal) grease chamber, vertical oil cooler and bearing shell.
The coolant pump motor finds that in use oil leakage appears in oil cooler, and makes main pump motor upper bearing (metal) oil level low, and this can cause the bearing bush temperature abnormal ascending to jump the serious risk of pump and nuclear island fire.Confirm the lower flange place of leakage of oil position at oil cooler through the scene.
Oil cooler lower flange place is positioned at the bottommost of motor upper bearing (metal) grease chamber, as shown in Figure 1, a kind of oil cooler that prior art provides comprises tube bank 1, middle casing flange 2, middle splint 3 and lower shell body flange 4, and is wherein fastening and be compressed with first seal ring 5 and second seal ring 6 by bolt 32 between middle splint 3, middle casing flange 2, the lower shell body flange 4.In the tube bank 1 is cooling water, is sealed with cold oil in first gap 21 between tube bank 1 and the middle casing flange 2, is sealed with cooling water in second gap 22 between tube bank 1 and the lower shell body flange 4.Offer peep hole 31 on the middle splint 3, be used for observing between turn(a)round the situation of oily side and the bulge test of water side.
The structural feature of leak source position, oil leak flow and the oil cooler lower seal of finding according to leakage detection in the reactor building can be judged as due to first seal ring, 5 defectives (as joint breaking) of oil cooler lower flange oil side.Cold oil is by behind the fault location of first seal ring 5, enters peep hole 31 and flows to the outside of oil cooler, thereby caused the leakage of cold oil.
The model utility content
Technical problem to be solved in the utility model is, a kind of reactor core coolant pump bearing oil cooler is provided, and can suppress the cooler leakage of oil.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of reactor core coolant pump bearing oil cooler, comprise tube bank, the middle casing flange, middle splint and lower shell body flange, first gap that has the sealing cold oil between described tube bank and the middle casing flange, second gap that has the sealing cooling water between described tube bank and the lower shell body flange, be provided with first seal ring between described middle casing flange and the middle splint, be provided with second seal ring between described lower shell body flange and the middle splint, described middle splint is provided with peep hole, and the outside port of described peep hole is sealed with plug spare.
More specifically, described plug spare comprises plug head and the joint that is complementary with described peep hole shape, and described plug head is connected with described joint, and described joint is arranged in the described peep hole, and described plug head is positioned at the outer side wall of described oil cooler.
More specifically, described middle splint is provided with at least one peep hole, all is sealed with described plug spare in the described peep hole.
More specifically, described middle splint is provided with at least two peep holes, and one of them described peep hole is circumscribed with balance tube, is sealed with described plug spare in remaining described peep hole.
More specifically, described middle splint is provided with four peep holes, and wherein three described peep holes are sealed by described plug spare, and another described peep hole is circumscribed with balance tube.
Behind the port sealing plug spare of peep hole; cold oil in first gap flows into peep hole from first seal ring; because the plugging action of plug spare; cold oil can be stranded in the peep hole; prevent that it is spilled over to the oil cooler outside from peep hole; thereby suppressed the oil cooler leakage effectively, guaranteed that the safety of equipment is normally moved, avoided shutting down the tremendous economic loss that may cause because of the leakage of oil defective.
Description of drawings
Fig. 1 is the structural representation of a kind of reactor core coolant pump bearing oil cooler of providing of prior art;
Fig. 2 is the structural representation of a kind of reactor core coolant pump bearing oil cooler of providing of the utility model embodiment;
Fig. 3 is the structural representation of plug spare among Fig. 2.
Embodiment
In order to make technical problem to be solved in the utility model, technological scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also Fig. 2, the utility model embodiment provides a kind of reactor core coolant pump bearing oil cooler, at the lower flange place, comprises tube bank 1, middle casing flange 2, middle splint 3 and lower shell body flange 4.First gap 21 that has the sealing cold oil between tube bank 1 and the middle casing flange 2 has second gap 22 that seals cooling water between tube bank 1 and the lower shell body flange 4.Be provided with first seal ring 5 between middle casing flange 2 and the middle splint 3, be provided with second seal ring 6 between lower shell body flange 4 and the middle splint 3, middle splint 3 is provided with peep hole 31, and the outside port of peep hole 31 is sealed with plug spare 7.
Particularly, in the present embodiment, oil cooler in lower flange place profile ringwise, so middle casing flange 2, middle splint 3 and lower shell body flange 4 be annular, and make first, second seal ring 5,6 be annular ring.Above-mentioned peep hole 31 radially through between the interior outer side wall of annular middle splint 3, is provided with a peep hole 31 in middle splint 3.
As shown in Figure 3, above-mentioned plug spare 7 comprises plug head 71 and the joint 72 that is complementary with peep hole 31 shapes, and plug head 71 is connected with joint 72, and joint 72 is arranged in the peep hole 31, and plug head 71 is positioned at the outer side wall of oil cooler.Plug head 71 and peep hole 31 all are column, and the diameter of plug head 71 conveniently provides tight power by plug head 71 for joint 72 greater than the diameter of joint 72.Joint 72 can block peep hole 31 after being arranged in the peep hole 31, has prevented that cold oil from leaking from peep hole 31.Peep hole 31 on the middle splint 3 all can prevent leakage of oil by 7 sealings of plug spare.Certainly, middle splint 3 can be provided with at least one peep hole 31, and each peep hole 31 is all by 7 sealings of plug spare.
If middle splint 3 is provided with at least two peep holes 31, a peep hole 31 is circumscribed with the balance tube (not shown) therein, and sealing filament blocking piece 7 in remaining peep hole 31.Plug spare 7 causes eminence with balance tube after blocking peep hole 31, and the cold oil that leaks is formed the static seal balanced action, and can play the effect of sealing equally.In the present embodiment, be evenly equipped with four peep holes 31 on the middle splint 3, wherein three peep holes 31 are by 7 sealings of plug spare, and another peep hole 31 is circumscribed with above-mentioned balance tube.
In addition, because middle casing flange 2, fastening between middle splint 3 and the lower shell body flange 4 by bolt 32, after above-mentioned shutoff, cold oil is discharged by the direction by two metal junction planes behind first Sealing, 5 fault locations, between junction plane in the process of exosmosis, can overflow downwards by clamping bolt 32 places, but this process is because the pretightening force existence of bolt 32, it or not the flow resistance that the screw thread of accurately machined junction plane and bolt 32 all can increase cold oil, inside and outside differential pressure is strengthened, this just is equivalent to the process of throttling step-down, therefore can significantly reduce the discharge rate of oil.
Through the simulation test surface, 6 droplets/minute have been reduced to after the shutoff by 98 droplets/minute of leakage of oil amounts before peep hole 31 shutoff, therefore can clearly see in peep hole 31 leakage of oils place and implement all can obviously reduce leakage of oil speed after the online local leak stopping of plug-hole or balance tube plug-hole, successfully suppress the leakage of cold oil.
Therefore, the utility model embodiment is behind the port sealing plug spare 7 of peep hole 31, cold oil in first gap 21 flows into peep hole 31 from first seal ring 5, because the plugging action of plug spare 7, cold oil can be stranded in the peep hole 31, prevent that it is spilled over to the oil cooler outside from peep hole 31, thereby suppressed the oil cooler leakage effectively, guaranteed that the safety of equipment is normally moved.
In the analysing and processing process that main pump motor upper bearing (metal) oil cooler leaks, fully analyzed the device structure characteristics, effectively utilized oil cooler building blocks of function principle, successful implementation online local leak stopping, guaranteed the safe operation of motor, avoided shutting down maintenance.1) eliminated the risk of device damage: after online local leak stopping was implemented, continuous monitoring main pump motor oil level and the no any variation of oil temperature had effectively been controlled equipment deficiency, have guaranteed that the safety of equipment is normally moved; 2) eliminated the risk of fire: control effectively and eliminated owing to lubricant oil continues to leak the potential fire risk that causes; 3) avoided the shutdown that causes because of the oil cooler leakage of oil.
And after the employing the technical program; the fault of main pump motor upper bearing (metal) oil cooler leakage of oil is effectively addressed; successfully control and eliminated the potential device damage and the risk of fire; guaranteed the normal operation of unit; the shutdown of having avoided causing owing to leakage of oil is overhauled, and has avoided the power station to shut down the tremendous economic loss that may cause because of the leakage of oil defective.Therefore the technical program has the meaning of applying in the similar fault treatment of main pump motor.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. reactor core coolant pump bearing oil cooler, comprise tube bank, the middle casing flange, middle splint and lower shell body flange, first gap that has the sealing cold oil between described tube bank and the middle casing flange, second gap that has the sealing cooling water between described tube bank and the lower shell body flange, be provided with first seal ring between described middle casing flange and the middle splint, be provided with second seal ring between described lower shell body flange and the middle splint, described middle splint is provided with peep hole, it is characterized in that: the outside port of described peep hole is sealed with plug spare.
2. reactor core coolant pump bearing oil cooler as claimed in claim 1, it is characterized in that: described plug spare comprises plug head and the joint that is complementary with described peep hole shape, described plug head is connected with described joint, described joint is arranged in the described peep hole, and described plug head is positioned at the outer side wall of described oil cooler.
3. reactor core coolant pump bearing oil cooler as claimed in claim 1 or 2, it is characterized in that: described middle splint is provided with at least one peep hole, all is sealed with described plug spare in the described peep hole.
4. reactor core coolant pump bearing oil cooler as claimed in claim 1 or 2, it is characterized in that: described middle splint is provided with at least two peep holes, one of them described peep hole is circumscribed with balance tube, is sealed with described plug spare in remaining described peep hole.
5. reactor core coolant pump bearing oil cooler as claimed in claim 4, it is characterized in that: described middle splint is provided with four peep holes, and wherein three described peep holes are sealed by described plug spare, and another described peep hole is circumscribed with balance tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920134185XU CN201560928U (en) | 2009-07-22 | 2009-07-22 | Oil cooler for bearing of coolant pump of reactor core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920134185XU CN201560928U (en) | 2009-07-22 | 2009-07-22 | Oil cooler for bearing of coolant pump of reactor core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201560928U true CN201560928U (en) | 2010-08-25 |
Family
ID=42626074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920134185XU Expired - Lifetime CN201560928U (en) | 2009-07-22 | 2009-07-22 | Oil cooler for bearing of coolant pump of reactor core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201560928U (en) |
-
2009
- 2009-07-22 CN CN200920134185XU patent/CN201560928U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangdong Nuclear Power Joint Venture Co., Ltd Assignor: China Guangdong Nuclear Power Group Co., Ltd.|Daya Bay Nuclear Power Operation and Management Co., Ltd Contract record no.: 2011440020358 Denomination of utility model: Oil cooler for bearing of coolant pump of reactor core Granted publication date: 20100825 License type: Exclusive License Record date: 20111009 |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHINA GENERAL NUCLEAR GROUP CO., LTD. Free format text: FORMER NAME: CHINA GUANGDONG NUCLEAR POWER GROUP CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city in Guangdong province 518031 17-19 floor Patentee after: China General Nuclear Power Corporation Patentee after: Dayawan Nuclear Power Running Management Co., Ltd. Address before: Shenzhen science and technology building, No. 1001 Futian District Road, Shenzhen city in Guangdong province 518031 17-19 floor Patentee before: China Guangdong Nuclear Power Group Co., Ltd. Patentee before: Dayawan Nuclear Power Running Management Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100825 |