CN201925237U - Chemical addition agent mixing pump for nuclear power station - Google Patents
Chemical addition agent mixing pump for nuclear power station Download PDFInfo
- Publication number
- CN201925237U CN201925237U CN 201020689709 CN201020689709U CN201925237U CN 201925237 U CN201925237 U CN 201925237U CN 201020689709 CN201020689709 CN 201020689709 CN 201020689709 U CN201020689709 U CN 201020689709U CN 201925237 U CN201925237 U CN 201925237U
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- Prior art keywords
- bearing
- pump
- cover
- impeller
- ball
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- Expired - Lifetime
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- 238000002156 mixing Methods 0.000 title claims abstract description 23
- 239000000126 substance Substances 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000000654 additive Substances 0.000 claims description 19
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 45
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000010687 lubricating oil Substances 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000008676 import Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a chemical addition agent mixing pump for a nuclear power station. In the utility model, a straight-conical water-sucking chamber is adopted, so that liquid can flow in a straight-conical constricted pipe, the flow velocity is gradually increased, the water distribution is uniform, the hydraulic loss is small, and a uniform velocity field is ensured at the inlet of an impeller; the locking structure of the impeller and a pump shaft is locked by the way that the external thread of a special locking bolt and the internal thread of the shaft end of the pump shaft are matched, the spherical surface of the locking bolt fully conforms to the shape of the hydraulic force of the impeller, so that the locking bolt after being arranged and the streamline shape of the impeller are integrated into a whole body, the water flow at the inlet of the impeller can be furthest ensured not to be affected, and simultaneously, the diameter of the pump shaft and the specification of a bearing can be enlarged; with a greater bearing, the chemical addition agent mixing pump can prolong service life and bear greater load; the pump body and a pump cover are connected by the way that the pump cover is directly pressed between the pump body and the bearing body, so that the whole axial dimension of the pump can be shortened; and a bearing oil seal device adopting labyrinth type seal achieves an ideal sealing effect; during an 400-hour endurance test, no lubricating oil leakage is caused.
Description
Technical field
The utility model relates to a kind of pump, is specifically related to a kind of chemical additives mixing pump that is used for nuclear power station.
Background technique
Chemical additives mixing pump safety class is RCC-P 3 (examining three grades), and making grade is RCC-M 3, belongs to EAS system (containment spray system), in the fuel factory building of position in nuclear island of nuclear power station.
The nuclear power station normal operation period, the operation that the chemical additives mixing pump is interrupted, operation in per 8 hours 20 minutes is so that chemistry adds the NaOH solution homogenization in the case; Wherein partial discharge is used for preventing that the sparger suction pipe that is submerged in NaOH solution from stopping up.
There is following defective in the existing chemical additives mixing pump that is used for nuclear power station:
1. the suction chamber of the pump housing is the straight-run of pipe formula, and hydraulic loss is bigger, and is even inadequately in the waterpower velocity field at impeller inlet place, can make the efficient of pump lower;
2. the locking mechanism of impeller is that the axle head of pump shaft stretches out from the perforation of impeller hub, outside thread by the impeller end of the internal thread of impeller nut and pump shaft locks impeller, this locking mechanism makes the diameter of axle of pump shaft be subjected to the restriction of impeller hub, and then the key on the pump shaft and the size of bearing also are restricted, the moment of torsion that key transmits is less, the load-carrying ability of bearing is restricted, and makes pump safety reliability at work not high enough; In addition, the position of impeller nut is more outstanding, enter fully in the pump housing suction chamber, and volume is also bigger, and the distance of stretching out is longer, can agitating vane the current of import, the hydraulic performance of impeller inlet is had certain influence.
3. the primary seal of the pump housing and pump cover adopts the structure of O-ring seals, and the sealing structure can not seal the processing lines that the pump housing and pump cover sealing surface produce owing to machining effectively;
4. the whole erection structure adopts and earlier pump cover is fixed on the pump housing by double-screw bolt, the bearing support support is fixed on the pump cover by double-screw bolt again, therefore causes the axial dimension of entire pump bigger;
5. the mechanical seal Intermediate shaft sleeve of pump cover is right after impeller, axle sleeve is cooperated with impeller, between centers be easy to generate the size interference;
6. no mechanical seal vents on the pump cover, can not effectively discharge the gas of mechanical seal place, bubble is damaged the seal face of mechanical seal, and because the characteristic of fed sheet of a media, the air in the drain pump mechanical seal chamber can not cause the crystalline polamer of medium and cause mechanical seal to be lost efficacy;
7. common outside framework oil seal is adopted in bearing seal, spring force in the outside framework oil seal is easy to generate the seize phenomenon when excessive, cause outside framework oil seal and pump shaft to rub, cause the pump shaft heating, and spring force can cause the excesssive gap between outside framework oil seal and pump shaft when not enough, and lubricant oil is leaked;
8. bearing support is made of with bearing bracket intermediate support and is connected by bolt, and in manufacturing, intermediate support and bearing bracket are processed respectively, and the coaxality of each part can not be definitely consistent, and is higher to the required precision of manufacturing, and also complicated when assembling.
The model utility content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of chemical additives mixing pump that is used for nuclear power station to be provided, and it helps the long-term operation of pump and prolongs the bearing maintenance cycle, can effectively improve the efficient of pump.
The technological scheme that realizes above-mentioned purpose is: a kind of chemical additives mixing pump that is used for nuclear power station, comprise stator module, rotor assembly, bearing unit and gland seal assembly, described stator module comprises that a pump housing, has the pump cover and a casing ring of mechanical seal chamber; Described rotor assembly comprises a pump shaft, an impeller and an axle sleeve; Described bearing unit comprises an intermediate support, bearing bracket, bearing, two oil baffle discs and bearing (ball) cover; Described gland seal assembly comprises mechanical seal device and bearing enclosure device, and wherein, the described pump housing comprises suction flange connected horizontally, suction chamber and spiral case, and described suction chamber is pre-large post-small straight-tapered; The end face that the described pump housing cooperates with described pump cover is a low outer high step surface in; Offer a tapped blind hole on the end face of the impeller end of described pump shaft, this impeller end is plugged in the wheelboss inner hole of described impeller and by a sphere hook bolt described impeller is locked; Described intermediate support and bearing bracket are the solid box body, and the end face that this bearing support cooperates with described pump cover is a high outside and low outside step surface, and this bearing support is fixedly mounted on described pump cover on the end face of the described pump housing by some main double-screw bolts and nut; Described pump cover is to be installed in described bearing support and locating stud on the described pump cover fitting surface by one to be positioned between end face that the described pump housing cooperates with described pump cover and described bearing support and the end face that described pump cover cooperates; Described bearing comprises that one is enclosed within on the anti-drive end of described pump shaft, and be installed in the roller bearing in the non-driven-end bearing chamber of bearing support and a pair ofly arrange back-to-back and be installed on the drive end of described pump shaft, and be installed in the drive end bearing chamber of bearing support 8; Described two bearings end cap is enclosed within on the described pump shaft and lays respectively at the impeller side of described roller bearing and the motor side of described angular contact ball bearing; Described two oil baffle discs be enclosed within on the described pump shaft and lay respectively at described roller bearing and described bearing (ball) cover between and between described angular contact ball bearing and the described bearing (ball) cover; Described mechanical seal device is an integrated mechanical sealing device, and it is installed on the described pump shaft and is arranged in the mechanical seal chamber of described pump cover; Described bearing enclosure device is labyrinth seal structure and is made of described bearing (ball) cover, described oil baffle disc and O-ring seals.
The above-mentioned chemical additives mixing pump that is used for nuclear power station, wherein, the block plate that described oil baffle disc comprises a bit of axle sleeve and radially extends on the outer surface of this axle sleeve, the edge of this block plate is that 14 °～16 ° mode bends cover on one side with the angle with its axis laterally, and described oil baffle disc is fixed on the described pump shaft and near described bearing; Described bearing (ball) cover comprises enclosing cover and encircles in axially extended towards the bearing side on the inner peripheral end surfaces of this enclosing cover, should radially extend a flange by the interior free end that encircles, the inner cavity surface of described bearing (ball) cover is provided with some labyrinth sealing grooves, the inner ring sleeve of described bearing (ball) cover is on the axle sleeve of described oil baffle disc, so that described labyrinth sealing groove is facing to the axle sleeve of described oil baffle disc; Described O-ring seals is located between the axle sleeve internal surface and described pump shaft of described oil baffle disc; Axle sleeve external diameter on the internal diameter of described bearing (ball) cover and the described oil baffle disc is a Spielpassung; Limit cover on flange on the described bearing (ball) cover and the described oil baffle disc is for Spielpassung, so that the limit enclosure on the described oil baffle disc is outside the flange of bearing (ball) cover.
The above-mentioned chemical additives mixing pump that is used for nuclear power station, wherein, described mechanical seal device comprises that one is enclosed within the gland that the outer machine envelope axle sleeve and of described axle sleeve is connected described pump cover upper end, the outer circumferential face of this machine envelope axle sleeve is up-small and down-big stepped shaft cylndrical surface, this machine envelope axle sleeve is sleeved on the described pump shaft and its underpart is enclosed within the wheel hub top of described impeller, and the length that machine envelope axle sleeve is enclosed within the wheel hub top of impeller accounts for the 35%-45% of whole machine envelope sleeve length.
The above-mentioned chemical additives mixing pump that is used for nuclear power station wherein, is provided with a slice metal gasket between the inner ring surface of described pump cover and described pump housing end face.
The above-mentioned chemical additives mixing pump that is used for nuclear power station, wherein, an exhaust port is offered in the upper end of the mechanical seal chamber of described pump cover.
The technological scheme that is used for the chemical additives mixing pump of nuclear power station of the present utility model adopts the straight-tapered suction chamber, and liquid is flowed in the straight-tapered collapsible tube, flow velocity is cumulative, is evenly distributed, and hydraulic loss is little, guarantee that impeller inlet has the even velocity field, can effectively improve the efficient of pump; The locking mechanism of impeller and pump shaft has been cancelled impeller nut, and the axle head of pump shaft does not need to stretch out the wheel hub end face of impeller, only lock with the screw-internal thread fit of the impeller end of the outside thread of a special lock bolt and pump shaft, the spherical surface of lock bolt meets the waterpower shape of impeller fully, not only volume is little, its excircle dimension is fully within the wheel hub of impeller, the shape that makes lock bolt that back and impeller are installed combines together, can the ground assurance of maximum performance the import current of impeller not exerted an influence, make the diameter of axle and the bearing of pump shaft can become big, bigger bearing can make the life-span prolong and can bear bigger load, helps the long-term operation of pump and prolongs the bearing maintenance cycle.The primary seal of the pump housing and pump cover adopts the metallic shim sealing, and under the coupling mechanism force effect of kingbolt, metallic shim can seal the pump housing effectively and the pump cover sealing surface is surperficial because the processing lines that machining produces has played splendid sealing effect; The pump housing has been cancelled the double-screw bolt connection with being connected of pump cover, adopt the pump housing to be connected with the main double-screw bolt of bearing support by 12 M12, again pump cover directly is pressed between the pump housing and the bearing support, can not only shortens the whole axial dimension of pump, and nearly 12 main double-screw bolts can make the margin of safety of primary seal higher.Bearing enclosure has adopted labyrinth sealing to reach desirable sealing effect, in 400 hours endurance test, does not have the leakage of lubricant oil.
Description of drawings
Fig. 1 is the structural representation that is used for the chemical additives mixing pump of nuclear power station of the present utility model;
Fig. 2 is the structural representation of mixing pump middle (center) bearing oil sealing seal apparatus of the present utility model;
Fig. 3 is the structural representation of the oil baffle disc in the bearing enclosure device of the present utility model;
Fig. 4 is the structural representation of the bearing (ball) cover in the bearing enclosure device of the present utility model.
Embodiment
In order to understand the technical solution of the utility model better, below by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
See also Fig. 1, the chemical additives mixing pump that is used for nuclear power station of the present utility model comprises stator module, rotor assembly, bearing unit and gland seal assembly.Stator module comprises the pump housing 1, a pump cover 3 and the casing ring 2 with mechanical seal chamber; Rotor assembly comprises a pump shaft 4, an impeller 5 and an axle sleeve 7; Bearing unit comprises a bearing support 8, bearing, two oil baffle discs 17 and two bearing (ball) covers 16; Gland seal assembly comprises mechanical seal device 18 and bearing enclosure device, wherein:
The pump housing 1 comprises suction flange 11, suction chamber 12 and the spiral case 13 of horizontal arrangement, and suction chamber 12 is taper from large to small; Use the advantage of straight-tapered suction chamber 12 to be: liquid flows in the straight-tapered collapsible tube, and flow velocity is cumulative, is evenly distributed, and hydraulic loss is little, guarantees that impeller 5 imports have the even velocity field, can effectively improve the working efficiency of pump; The end face that the pump housing 1 cooperates with pump cover 3 is a low outer high step surface in;
The effect of casing ring 2 is the return loss that reduce pump, and the seal ring by high-abrasive material is made is set on the pump housing 1 by screw;
The impeller end of pump shaft 4 is offered a tapped blind hole, and the impeller end of pump shaft 4 is plugged in the wheelboss inner hole of impeller 5 and makes the end of pump shaft 4 not stretch out impeller 5, is connected with impeller 5 by a sphere hook bolt 6 again; The advantage of the locking mechanism between this pump shaft 4 and the impeller 5 shows as: at first, impeller hub needn't be stretched out in the end of pump shaft 4, so the diameter of pump shaft 4 will not be subjected to the restriction of impeller hub, the pump shaft diameter of prior art can be increased 8～10mm, because the increase of the diameter of pump shaft 4, the size of key also becomes big accordingly on the pump shaft 4, and the moment of torsion that can transmit has also become greatly, makes pump more safe and reliable at work; Secondly, the sphere head of lock bolt 6 meets the waterpower shape of impeller 5 fully, and not only volume is little, and its excircle dimension is fully within impeller hub, the shape that makes lock bolt 6 that back and impeller 5 are installed combines together, can guarantee to greatest extent not the import current of impeller 5 are exerted an influence; In addition, because the increase of pump shaft 4 diameters, it is big to make that the size of bearing also is able to the phase strain, bigger bearing can make bearing life prolong and the load that can bear bigger, help the long-term operation of pump and prolong the maintenance period of bearing;
The outer rim of pump cover 3 is installed between the inner ring surface that locating stud 30 on the inner ring surface of bearing support 8 lower ends is positioned at the inner ring surface of the pump housing 1 upper end and bearing support 8 lower ends by one, be provided with the primary seal of a metallic shim 31 as 3 of the pump housing 1 and pump covers between the inner ring surface of pump cover 3 and the pump housing 1 upper end, bearing support 8 is fixedly mounted on the rear end of the pump housing 1 by 12 main double-screw bolts 9 and nut 10; Because pump cover 3 directly is pressed between the pump housing 1 and the bearing support 8, both made things convenient for the installation between the pump housing 1 and pump cover 3 and the bearing support 8, can shorten the axial dimension of pump again, and nearly 12 main double-screw bolt 9 makes that the margin of safety of primary seal is higher; Metallic shim 31 can seal the sealing surface of the pump housing 1 and pump cover 3 under the coupling mechanism force effect of main double-screw bolt 9 effectively because the processing lines that machining produces has played splendid sealing effect;
Bearing comprises a roller bearing 14 and a pair of angular contact ball bearing 15; Roller bearing 14 is enclosed within on the anti-drive end of pump shaft 4 and is installed in the bearing bore of anti-drive end of bearing support 8; A pair of angular contact ball bearing 15 is arranged on the drive end of pump shaft 4 back-to-back and is installed in the bearing bore of drive end of bearing support 8;
Two bearing (ball) covers 16 are enclosed within and also are installed on the impeller side of roller bearing 14 and the motor side of angular contact ball bearing 15 on the pump shaft 4 respectively;
Two oil baffle discs 17 be enclosed within on the pump shaft 4 and lay respectively at roller bearing 14 and bearing (ball) cover 17 between and between angular contact ball bearing 15 and the bearing (ball) cover 17;
An exhaust port 32 is offered in the lower end of the mechanical seal chamber of pump cover 3, before the firm startup of pump has not also reached normal operation, can effectively discharge the gas of mechanical seal chamber, the destruction of having avoided bubble to cause to the seal face of mechanical seal device 18, and because the characteristic of fed sheet of a media, the air in the drain pump mechanical seal chamber can not cause the crystalline polamer of medium and cause mechanical seal to be lost efficacy;
See also Fig. 2 to Fig. 4 again, the bearing enclosure device is made of bearing (ball) cover 16 and oil baffle disc 17, wherein:
Bearing (ball) cover 16 comprise enclosing cover 161 and on the inner peripheral end surfaces of this enclosing cover 161 towards the bearing side axially extended in ring 162, encircle 162 free end in this and radially extend a flange 163, the inner cavity surface of bearing (ball) cover 16 is provided with twice labyrinth sealing groove 164; The interior ring 162 of bearing (ball) cover 16 is enclosed within outside the axle sleeve 171 of oil baffle disc 17, so that labyrinth sealing groove 164 is facing to the axle sleeve 171 of oil baffle disc 17;
It is Spielpassung that flange 163 on the bearing (ball) cover 16 covers 173 with the limit on the oil baffle disc 17, so that the cover of the limit on the oil baffle disc 17 173 is enclosed within outside the flange 163 of bearing (ball) cover 16; Gap L between the ear end face of the flange 163 on the bearing (ball) cover 16 and the front-end face of the block plate 172 on the oil baffle disc 17 is 1～1.5mm;
The outer surface of the flange 163 on the bearing (ball) cover 16 is a conical surface, and the internal surface of limit on the oil baffle disc 17 cover 173 is the adaptive conical surface of tapering with the outer surface of this flange 163;
Be provided with O-ring seals 40 between axle sleeve 171 internal surfaces of oil baffle disc 17 and the pump shaft 4;
Also can be provided with locking nut 21 and packing ring 22 between oil baffle disc 17 and a pair of angular contact ball bearing 15.
The centrifugal force that in the pump operation process, produces, when making bearing oil produce axial flow, (level height is higher in the bearing support oil pocket, bearing lower end roller 2/3 in flooded lubrication oil), be provided with O-ring seals 40 between the internal surface of oil baffle disc 17 and the pump shaft 4, guaranteed between oil baffle disc 17 and the pump shaft 4 oil-proof, and at first be subjected to the stopping of block plate 172 of oil baffle disc 17, under the action of centrifugal force of block plate 172, force lubricant oil to change the former direction that axially flows, be thrown toward very soon block plate 172 around, and the limit at block plate 172 edges cover 173 can make the lubricant oil that splashes block plate 172 enter the space 165 interior (oil circuit collection cavity) of bearing (ball) cover 16 along the tangent direction of limit cover 173, labyrinth sealing groove 164 on the bearing (ball) cover 16 can make lubricant oil before flowing out bearing (ball) cover 16 in the oil-return groove 166 of bearing (ball) cover 16 bottoms the (see figure 2) of inflow bearing support 8, thereby reached desirable sealing effect, in 400 hours endurance test, there is not the leakage of lubricant oil.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.
Claims (5)
1. a chemical additives mixing pump that is used for nuclear power station comprises stator module, rotor assembly, bearing unit and gland seal assembly, and described stator module comprises that a pump housing, has the pump cover and a casing ring of mechanical seal chamber; Described rotor assembly comprises a pump shaft, an impeller and an axle sleeve; Described bearing unit comprises an intermediate support, bearing bracket, bearing, two oil baffle discs and bearing (ball) cover; Described gland seal assembly comprises mechanical seal device and bearing enclosure device, it is characterized in that,
The described pump housing comprises suction flange connected horizontally, suction chamber and spiral case, and described suction chamber is pre-large post-small straight-tapered; The end face that the described pump housing cooperates with described pump cover is a low outer high step surface in;
Offer a tapped blind hole on the end face of the impeller end of described pump shaft, this impeller end is plugged in the wheelboss inner hole of described impeller and by a sphere hook bolt described impeller is locked;
Described intermediate support and bearing bracket are the solid box body, and the end face that this bearing support cooperates with described pump cover is a high outside and low outside step surface, and this bearing support is fixedly mounted on described pump cover on the end face of the described pump housing by some main double-screw bolts and nut;
Described pump cover is to be installed in described bearing support and locating stud on the described pump cover fitting surface by one to be positioned between end face that the described pump housing cooperates with described pump cover and described bearing support and the end face that described pump cover cooperates;
Described bearing comprises that one is enclosed within on the anti-drive end of described pump shaft, and be installed in the roller bearing in the non-driven-end bearing chamber of bearing support and a pair ofly arrange back-to-back and be installed on the drive end of described pump shaft, and be installed in the drive end bearing chamber of bearing support (8);
Described two bearings end cap is enclosed within on the described pump shaft and lays respectively at the impeller side of described roller bearing and the motor side of described angular contact ball bearing;
Described two oil baffle discs be enclosed within on the described pump shaft and lay respectively at described roller bearing and described bearing (ball) cover between and between described angular contact ball bearing and the described bearing (ball) cover;
Described mechanical seal device is an integrated mechanical sealing device, and it is installed on the described pump shaft and is arranged in the mechanical seal chamber of described pump cover;
Described bearing enclosure device is labyrinth seal structure and is made of described bearing (ball) cover, described oil baffle disc and O-ring seals.
2. the chemical additives mixing pump that is used for nuclear power station according to claim 1, it is characterized in that, the block plate that described oil baffle disc comprises a bit of axle sleeve and radially extends on the outer surface of this axle sleeve, the edge of this block plate is that 14 °～16 ° mode bends cover on one side with the angle with its axis laterally, and described oil baffle disc is fixed on the described pump shaft and near described bearing;
Described bearing (ball) cover comprises enclosing cover and encircles in axially extended towards the bearing side on the inner peripheral end surfaces of this enclosing cover, should radially extend a flange by the interior free end that encircles, the inner cavity surface of described bearing (ball) cover is provided with some labyrinth sealing grooves, the inner ring sleeve of described bearing (ball) cover is on the axle sleeve of described oil baffle disc, so that described labyrinth sealing groove is facing to the axle sleeve of described oil baffle disc;
Described O-ring seals is located between the axle sleeve internal surface and described pump shaft of described oil baffle disc;
Axle sleeve external diameter on the internal diameter of described bearing (ball) cover and the described oil baffle disc is a Spielpassung;
Limit cover on flange on the described bearing (ball) cover and the described oil baffle disc is for Spielpassung, so that the limit enclosure on the described oil baffle disc is outside the flange of bearing (ball) cover.
3. the chemical additives mixing pump that is used for nuclear power station according to claim 1, it is characterized in that, described mechanical seal device comprises that one is enclosed within the gland that the outer machine envelope axle sleeve and of described axle sleeve is connected described pump cover upper end, the outer circumferential face of this machine envelope axle sleeve is up-small and down-big stepped shaft cylndrical surface, this machine envelope axle sleeve is sleeved on the described pump shaft and its underpart is enclosed within the wheel hub top of described impeller, and the length that machine envelope axle sleeve is enclosed within the wheel hub top of impeller accounts for the 35%-45% of whole machine envelope sleeve length.
4. the chemical additives mixing pump that is used for nuclear power station according to claim 1 is characterized in that, is provided with a slice metal gasket between the inner ring surface of described pump cover and described pump housing end face.
5. the chemical additives mixing pump that is used for nuclear power station according to claim 1 is characterized in that an exhaust port is offered in the upper end of the mechanical seal chamber of described pump cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020689709 CN201925237U (en) | 2010-12-30 | 2010-12-30 | Chemical addition agent mixing pump for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020689709 CN201925237U (en) | 2010-12-30 | 2010-12-30 | Chemical addition agent mixing pump for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201925237U true CN201925237U (en) | 2011-08-10 |
Family
ID=44429088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020689709 Expired - Lifetime CN201925237U (en) | 2010-12-30 | 2010-12-30 | Chemical addition agent mixing pump for nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201925237U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146936A (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Chemical additive mixing pump for nuclear power station |
| CN105317730A (en) * | 2015-10-19 | 2016-02-10 | 季裕成 | Bearing box device of tangent flow pump |
| CN113153765A (en) * | 2021-05-26 | 2021-07-23 | 苏州沃达园林机械有限公司 | High sealing performance immersible pump |
-
2010
- 2010-12-30 CN CN 201020689709 patent/CN201925237U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146936A (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Chemical additive mixing pump for nuclear power station |
| CN102146936B (en) * | 2010-12-30 | 2012-07-04 | 上海阿波罗机械股份有限公司 | Chemical additive mixing pump for nuclear power station |
| CN105317730A (en) * | 2015-10-19 | 2016-02-10 | 季裕成 | Bearing box device of tangent flow pump |
| CN113153765A (en) * | 2021-05-26 | 2021-07-23 | 苏州沃达园林机械有限公司 | High sealing performance immersible pump |
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