CN108953213A - A kind of 1000MW fired power generating unit fore pump - Google Patents
A kind of 1000MW fired power generating unit fore pump Download PDFInfo
- Publication number
- CN108953213A CN108953213A CN201710384814.3A CN201710384814A CN108953213A CN 108953213 A CN108953213 A CN 108953213A CN 201710384814 A CN201710384814 A CN 201710384814A CN 108953213 A CN108953213 A CN 108953213A
- Authority
- CN
- China
- Prior art keywords
- pump
- power generating
- generating unit
- main shaft
- pump case
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of 1000MW fired power generating unit fore pumps, including bearing chamber, cooling chamber, main shaft and impeller, main shaft is connected through bearing chamber and by mechanical seal with cooling chamber, impeller is fixedly mounted on the middle part of main shaft, fore pump includes two detachable ends and a U-shaped pump case unit, and when installation, two end caps are symmetrically mounted on the two sides of bearing chamber, the line of two end cap centrals is vertical with main shaft, and the both ends of pump case unit are fixedly connected with two end caps respectively.Compared with prior art, the present invention is by designing new fore pump split mechanical seals structure, using O-ring, guarantee the sealing effect of sealing surface, it has saved pump and has repaired the time, improved the working efficiency that pump is repaired, save the operating cost of power plant, the service life for improving pump simultaneously guarantees that the operation steady in a long-term of Power Plant all has great importance.
Description
Technical field
The present invention relates to preposition pump technical fields, and in particular to a kind of sealing structure of 1000MW fired power generating unit fore pump.
Background technique
Power plant's high temperature and pressure pump group belongs to high-end precision rotation machinery, is made of fore pump and main pump.Steam turbine drives
The rotation of deceleration gear case drives fore pump main axis by gear-box slow-speed shaft.In general, fore pump is midsplit type,
Wheel cylinder lid and pump seat, are fastened by bolts, and seal split with fish paper.Traditional midsplit type sealing structure is due to contact surface
Section in entire, sealing area is big, therefore more difficulty is fully sealed, with the increase of running time, the fish paper of sealing surface
It can be impregnated and soften by high-temperature high-pressure boiler water, cause sealing surface leak serious, this is that the midsplit type structure of fore pump determines.One
As power plant can by dismantle the pump housing, replace fish paper, reinstall pump cover sealing split.It does so, needs entire system of power plant
System is stopped transport, and maintenance cost is higher, and in maintenance process, needs to dismantle entire pump cover, after installing, has one in certain time
Fixed sealing effect, but need to dismantle again after long-time, this has detrimental effect for the operation steady in a long-term of entire power plant.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of long service life, fortune
The 1000MW fired power generating unit fore pump of row stabilization, good airproof performance.
The purpose of the present invention can be achieved through the following technical solutions: a kind of 1000MW fired power generating unit fore pump, described
Fore pump includes bearing chamber, cooling chamber, main shaft and impeller, and the main shaft is through bearing chamber and passes through mechanical seal and cooling chamber phase
Even, the impeller is fixedly mounted on the middle part of main shaft, and the fore pump includes that two detachable ends and one are U-shaped
Pump case unit, when installation, two end caps are symmetrically mounted on the two sides of bearing chamber, and the line of two end cap centrals is vertical with main shaft,
The both ends of the pump case unit are fixedly connected with two end caps respectively.
The present invention uses impeller and other bearing arrangements same as the prior art, the difference lies in that bearing of the invention
Room be it is integrally formed, sealing problem is not present, end cap and pump case unit are installed in the two sides of bearing chamber, i.e., using radial subdivision
The preposition pump configuration of formula, in dismounting, present invention only requires end cap and pump case is disassembled, then by the indoor core packet of bearing
Removal haves no need to change entire pipeline, and pump is repaired efficiency and greatly improved, and reduces pump and accomplishes this, reduce sealing area, improves
Sealing performance, the pump for increasing fore pump are repaired interval time, and then guarantee the operation steady in a long-term of entire Power Plant.
Described two end caps are in tubbiness, and one end inwardly is fixedly connected with bearing chamber, and one end outwardly is along the circumferential direction
Equipped with multiple screw holes.
The pump case unit includes two pump cases disposed in parallel and the interconnecting piece that connect with two pump cases, two pumps
The internal diameter of one end is identical outwardly with two end caps respectively for the size of shell, and the side of pump case is equipped with multiple installations to match with screw hole
Hole, when installation, bolt passes through screw hole and mounting hole, and pump case is connect with end cap.
The quantity fallen through on the end cap is identical with the quantity of pump case upper installing hole, >=2.
When installation, the contact surface of the pump case and end cap is equipped with O-ring seal.
When installation, O-shaped groove is equipped in the pump case, the O-ring seal is placed in the O-shaped groove, and O-shaped sealing
The height of circle is slightly larger than the depth of O-shaped groove.It can guarantee that O-ring seal is in compressive state during installation, guarantees close in this way
Feng Xing.
Compared with prior art, the beneficial effects of the present invention are embodied in: by designing new fore pump split mechanical seals structure,
Using O-ring, guarantee the sealing effect of sealing surface, saved pump and repaired the time, improves the working efficiency that pump is repaired, save power plant
Operating cost, while the service life of pump is improved, guarantee that the operation steady in a long-term of Power Plant all has great importance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 is bearing chamber, and 2 be main shaft, and 3 be pump case, and 4 be O-ring seal, and 5 be end cap, and 6 be cooling chamber, and 7 be machinery
Sealing structure, 8 be bolt, and 9 be impeller.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
A kind of 1000MW fired power generating unit fore pump, structure is as shown in Figure 1, include bearing chamber 1, cooling chamber 6,2 and of main shaft
Impeller 9, main shaft 2 are connected through bearing chamber 1 and by mechanical seal 7 with cooling chamber 6, and impeller 9 is fixedly mounted in main shaft 2
Portion, fore pump further include two detachable ends 5 and a U-shaped pump case unit, and when installation, two end caps 5 are symmetrical
The two sides of bearing chamber 1 are mounted on, the line at two 5 centers of end cap is vertical with main shaft 2, and the both ends of pump case unit are held with two respectively
Lid 5 is fixedly connected.
The bearing chamber 1 of the fore pump be it is integrally formed, be not present sealing problem, bearing chamber 1 two sides install end cap 5
And pump case unit, that is, the preposition pump configuration of radially split type is used, in dismounting, present invention only requires tear end cap 5 and pump case 3 open
It unloads down, then removes the core packet in bearing chamber 1, have no need to change entire pipeline, pump is repaired efficiency and greatly improved, and reduces
Pump accomplishes this, reduces sealing area, improves sealing performance, and the pump that increases fore pump is repaired interval time, and then guarantees entire
The operation steady in a long-term of Power Plant.
Two end caps 5 are in tubbiness, and one end inwardly is fixedly connected with bearing chamber 1, and one end outwardly is along the circumferential direction set
There are multiple screw holes.
Pump case unit includes two pump cases 3 disposed in parallel and the interconnecting piece that connect with two pump cases 3, two pump cases 3
Size the internal diameter of one end is identical outwardly with two end caps 5 respectively, the side of pump case 3 is equipped with multiple installations to match with screw hole
Hole, when installation, bolt 8 passes through screw hole and mounting hole, and pump case 3 is connect with end cap 5.
The quantity fallen through on end cap 5 is identical with the quantity of 3 upper installing hole of pump case, >=2.
When installation, the contact surface of pump case 3 and end cap 5 is equipped with O-ring seal 4.
When installation, O-shaped groove is equipped in pump case 3, O-ring seal 4 is placed in the O-shaped groove, and O-ring seal 4
Height is slightly larger than the depth of O-shaped groove.It can guarantee that O-ring seal 4 is in compressive state during installation, guarantees sealing in this way
Property.
Claims (6)
1. a kind of 1000MW fired power generating unit fore pump, the fore pump includes bearing chamber, cooling chamber, main shaft and impeller, the master
Axis is connected through bearing chamber and by mechanical seal with cooling chamber, and the impeller is fixedly mounted on the middle part of main shaft, and feature exists
It include two detachable ends and a U-shaped pump case unit in, the fore pump, when installation, two end caps are symmetrical
Be mounted on the two sides of bearing chamber, the line of two end cap centrals is vertical with main shaft, the both ends of the pump case unit respectively with two
End cap is fixedly connected.
2. a kind of 1000MW fired power generating unit fore pump according to claim 1, which is characterized in that described two end caps are in bucket
Shape, one end inwardly are fixedly connected with bearing chamber, and one end outwardly is along the circumferential direction equipped with multiple screw holes.
3. a kind of 1000MW fired power generating unit fore pump according to claim 2, which is characterized in that the pump case unit packet
The interconnecting piece for including two pump cases disposed in parallel and being connect with two pump cases, the size of two pump cases respectively with two end cap courts
The internal diameter of outer one end is identical, and the side of pump case is equipped with multiple mounting holes to match with screw hole, when installation, bolt pass through screw hole and
Pump case is connect by mounting hole with end cap.
4. a kind of 1000MW fired power generating unit fore pump according to claim 3, which is characterized in that fall through on the end cap
Quantity is identical with the quantity of pump case upper installing hole, >=2.
5. a kind of 1000MW fired power generating unit fore pump according to claim 3, which is characterized in that when installation, the pump case
O-ring seal is equipped with the contact surface of end cap.
6. a kind of 1000MW fired power generating unit fore pump according to claim 5, which is characterized in that when installation, the pump case
Interior to be equipped with O-shaped groove, the O-ring seal is placed in the O-shaped groove, and the height of O-ring seal is slightly larger than O-shaped groove
Depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384814.3A CN108953213A (en) | 2017-05-26 | 2017-05-26 | A kind of 1000MW fired power generating unit fore pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384814.3A CN108953213A (en) | 2017-05-26 | 2017-05-26 | A kind of 1000MW fired power generating unit fore pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108953213A true CN108953213A (en) | 2018-12-07 |
Family
ID=64494630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710384814.3A Pending CN108953213A (en) | 2017-05-26 | 2017-05-26 | A kind of 1000MW fired power generating unit fore pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108953213A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247245Y (en) * | 1995-05-18 | 1997-02-12 | 薛铭 | Axle open type double-suction centrifugal pump |
| CN2299952Y (en) * | 1997-03-10 | 1998-12-09 | 无锡市鹏程水泵厂 | Double-sucking centrifugal pump |
| CN2307938Y (en) * | 1997-04-30 | 1999-02-17 | 薛铭 | Axial separated type double-sucking centrifugal pump |
| US6048168A (en) * | 1998-02-19 | 2000-04-11 | Goulds Pumps, Incorporated | Lubricated ceramic/hybrid anti-friction bearing centrifugal pump |
| CN201090490Y (en) * | 2007-09-29 | 2008-07-23 | 上海凯士比泵有限公司 | Fore pump with improved structure |
| CN205663626U (en) * | 2016-05-20 | 2016-10-26 | 洪莲 | Double suction centrifugal pump is driven to horizontal axle |
-
2017
- 2017-05-26 CN CN201710384814.3A patent/CN108953213A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247245Y (en) * | 1995-05-18 | 1997-02-12 | 薛铭 | Axle open type double-suction centrifugal pump |
| CN2299952Y (en) * | 1997-03-10 | 1998-12-09 | 无锡市鹏程水泵厂 | Double-sucking centrifugal pump |
| CN2307938Y (en) * | 1997-04-30 | 1999-02-17 | 薛铭 | Axial separated type double-sucking centrifugal pump |
| US6048168A (en) * | 1998-02-19 | 2000-04-11 | Goulds Pumps, Incorporated | Lubricated ceramic/hybrid anti-friction bearing centrifugal pump |
| CN201090490Y (en) * | 2007-09-29 | 2008-07-23 | 上海凯士比泵有限公司 | Fore pump with improved structure |
| CN205663626U (en) * | 2016-05-20 | 2016-10-26 | 洪莲 | Double suction centrifugal pump is driven to horizontal axle |
Non-Patent Citations (2)
| Title |
|---|
| 刘军营: "《液压与气压传动》", 31 August 2014, 西安电子科技大学出版社 * |
| 钱同一: "《机械制造工艺基础》", 30 June 2004, 冶金工业出版社 * |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181207 |
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| WD01 | Invention patent application deemed withdrawn after publication |