CN102734207A - High-temperature boiler feed pump - Google Patents
High-temperature boiler feed pump Download PDFInfo
- Publication number
- CN102734207A CN102734207A CN2012102079362A CN201210207936A CN102734207A CN 102734207 A CN102734207 A CN 102734207A CN 2012102079362 A CN2012102079362 A CN 2012102079362A CN 201210207936 A CN201210207936 A CN 201210207936A CN 102734207 A CN102734207 A CN 102734207A
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- sealing
- boiler feed
- cooling chamber
- temperature boiler
- temperature
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- 238000007789 sealing Methods 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000013016 damping Methods 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims description 24
- 230000037431 insertion Effects 0.000 claims description 24
- 210000004907 gland Anatomy 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
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Abstract
The invention discloses a high-temperature boiler feed pump and belongs to the technical field of water pumps. The high-temperature boiler feed pump comprises an axial suction part, a first-stage impeller, an impeller, a guide blade, a middle section, a water outlet section, a rotation shaft and a shaft sealing structure; a sealing device, an inner cooling chamber and an outer sealing chamber are arranged in the shaft sealing structure; the sealing device comprises a packing seal combination piece; a sealing sleeve is arranged in the packing seal combination piece; and the inner cooling chamber which is communicated with the outer sealing chamber is arranged on the outer circumference of the sealing sleeve. According to the high-temperature boiler feed pump, a sealing structure and a cooling structure are organically combined, the high temperature and high pressure-resisting sealing structure is simplified, the sealing reliability and the cooling effect are improved by means of throttling damping pressure reducing sealing of the sealing sleeve, packing ring combined sealing and containerized mechanical sealing; and meanwhile, the service life of the high temperature and high pressure resisting sealing is obviously prolonged by the containerized mechanical sealing capable of adjusting the tightness of combined packing; and the cavitation performance of a product is improved obviously, the product is low in manufacturing and maintenance cost and long is service life.
Description
Technical field
The invention belongs to the water pump field; Be particularly related in the pipeline or loop that is applied in metallurgy, electric power, light textile, petrochemical industry, chemical industry, rubber, building materials, heating UTILIZATION OF VESIDUAL HEAT IN and the condensed water in high temperature recycling system, carry the boiler feed pump of HTHP hot water or liquid medium.
Background technique
In the water-heating boiler feedwater in metallurgy, electric power, light textile, petrochemical industry, chemical industry, rubber, building materials, heating UTILIZATION OF VESIDUAL HEAT IN and condensed water in high temperature recycling system; Usually adopt two kinds of forms of low temperature boiler feed water and high-temperature boiler feedwater; Adopt its heat energy utilization rate of low temperature boiler feed water lower; Adopt its heat energy utilization rate of high-temperature boiler feedwater than higher, can reach 50～70% usually.Great majority adopt the form of low temperature boiler feed water at home and abroad; The temperature of feedwater generally about 50～100 ℃, so lower to the serviceability temperature requirement of boiler feed pump, usually all below 110 ℃; Its inlet pressure is smaller or equal to 0.2Mpa; Cavitation performance to pump is less demanding, and is lower to the axle envelope requirement of pump, just can satisfy the technological process requirement.And adopting high-temperature boiler feedwater form, generally about 150～265 ℃, pressure is at 0.5～5.5Mpa for its hot water temperature.Feed temperature is high more, and its heat energy utilization rate is just high more, and just high more to the usage requirement of boiler feed pump, the serviceability temperature that requires boiler feed pump usually is about 160～280 ℃, and its inlet pressure reaches 1.0～6.4Mpa.The boiler feed pump of present domestic use, its cavitation performance is poor, the sealing of rotating shaft or employing packing seal combination; Or bellows mechanical seal adds external cooler combination, and these two kinds of schemes are all very unreasonable, and the former serviceability temperature is low relatively; Poor sealing performance, when 110 ℃ of serviceability temperatures, leak the hot water that comes out reach the 10-15 liter/minute; The high-temperature-hot-water that leaks becomes steam and is full of whole workshop, and boiler feed pump just can't proper functioning; The latter is under the operating conditions of HTHP, axial float; Be prone to produce bigger friction and impact force between the dynamic and static ring of mechanical seal; Add that external cooler and outer cooling chamber cooling effect are poor; Sealing very easily weares and teares or damages, and causes sealing reliability to reduce (or forfeiture), and working life is not long.
Summary of the invention
The object of the present invention is to provide a kind of novel axial to suck the high-temperature boiler feed water pump of sectional type multistage pump structure and sealing configuration.For this reason; Following technological scheme is adopted in this practicality invention: comprise axial suction casing, first stage impeller, impeller, stator, stage casing, water exit end, rotating shaft, and the sealing configuration of axle, be provided with seal arrangement and inside and outside cooling chamber in the axle sealing structure; Said seal arrangement comprises stuffing box gland; The stuffing box gland internal diameter is the two-stage stepped form, and leading portion internal diameter and axle sleeve are provided with the insertion ring combination movingly in the cavity that back segment internal diameter and shaft room form; The outer circumferential side of stuffing box gland is formed with the interior cooling chamber that is communicated with outer cooling chamber, and the rear is provided with the cooling water ring;
In above-mentioned a kind of a kind of high-temperature boiler feed water pump, wherein, described axial suction sections is the multistage centrifugal pump structure, and stuffing box gland leading portion outer circumferential side is provided with radiating fin;
In above-mentioned a kind of a kind of high-temperature boiler feed water pump; Wherein, Combined mechanical sealing comprises anterior throttling damping sealing, insertion ring combination seal and rear portion integrated mechanical sealing, and insertion ring combination forwardly and rear portion integrated mechanical sealing are provided with the adjustment sleeve that the cooling water ring that communicates with interior cooling chamber and insertion ring make up degree of tightness;
In above-mentioned a kind of a kind of high-temperature boiler feed water pump, wherein, described anterior insertion ring combination is formed by expanded graphite circle, high-carbon fibrous loop stacked combination; Simultaneously, the flow of cooling water route is a cooling chamber outside the cooling chamber of bearing housing is extremely said, cooling chamber in getting into again, and through cooling water ring, discharge then.
Owing to adopt above technological scheme; The present invention organically combines sealing configuration and cooling structure; Simplified the high temperature high voltage resistant sealing configuration; Through the means of stuffing box gland throttling damping step-down sealing, insertion ring combination seal and integrated mechanical sealing, improve sealing reliability and cooling effect, adopt the integrated mechanical sealing of can regulate insertion ring combination degree of tightness at last; Make the serviceability temperature of high-temperature boiler feed water pump reach 280 ℃, inlet pressure and reach 6.4Mpa, simultaneously, sealing does not have and leaks; Needed cooling water pressure is merely 1.0～3.0MPa, and cooling water inflow is merely the industrial water of Q=1.5～2.5m3/h; Significantly improve the working life of high temperature high voltage resistant seal arrangement.And, adopting technological scheme of the present invention, the cavitation performance of product significantly improves (net positive suction head NPSHr value reduces more than 50%), and the manufacture cost of product and maintenance cost are all lower, long service life.
Description of drawings
Fig. 1 is the generalized section of an embodiment of the present invention.
Fig. 2 is the partial enlarged drawing at A place among Fig. 1.
Fig. 3 is the schematic representation of stuffing box gland of the present invention.
Embodiment
With reference to accompanying drawing 1 to Fig. 3; The present invention includes axial suction casing 1, first stage impeller 2, impeller 3, stator 4, stage casing 5, water exit end 6, rotating shaft 7, seal 15; And the sealing configuration of axle, being provided with outer cooling chamber 8, interior cooling chamber 11 and seal arrangement in the sealing configuration, seal arrangement comprises stuffing box gland 9; The stuffing box gland internal diameter is the two-stage stepped form; Be provided with insertion ring combination 10 in the cavity of leading portion internal diameter 91, back segment internal diameter and 71 formation of axle sleeve, the outer circumferential side of stuffing box gland is formed with the interior cooling chamber 11 that is communicated with outer cooling chamber, and the rear is provided with cooling water ring 12; Rear at cooling water ring 12 is provided with integrated mechanical sealing 14, before integrated mechanical sealing 14, is provided with the adjustment sleeve 13 of regulating insertion ring combination degree of tightness.
Described in the present invention " rear ", " rear end " are meant the direction that deviates from impeller.
Seal assembly comprises stuffing box gland 9 and axle sleeve 71, insertion ring combination 10, cooling water ring 12, adjustment sleeve 13, integrated mechanical sealing 14.Stuffing box gland leading portion internal diameter 91 forms throttling damping step-down sealing movingly with axle sleeve 71; Reduce the heat hydraulic pressure; Simultaneously; 11 pairs of hot water that flow between stuffing box gland leading portion internal diameter 91 and the axle sleeve of the interior cooling chamber of stuffing box gland leading portion outer circumferential side are directly lowered the temperature, and the cooling-down effect of the outer cooling chamber of its effect mechanical seal more in the past is far better, has prevented that the hot water after the step-down from becoming steam.
In order to improve cooling effect, also can be provided with radiating fin 92 at the leading portion outer circumferential side of stuffing box gland, simultaneously, radiating fin 92 can strengthen the rigidity of stuffing box gland, thereby can reduce the wall thickness of stuffing box gland as best one can, improves cooling effect.
As illustrated in fig. 1 and 2, interior cooling chamber 11 is to be formed by the inboard of stuffing box gland with outer cooling chamber 8, the hole 81 of cooling chamber 11 in the madial wall of cooling chamber 8 is provided with and is communicated with outside.
Combined mechanical sealing comprises stuffing box gland 9 anterior throttling damping step-down sealings, insertion ring combination 10 sealing and rear portion integrated mechanical sealings 14; After the selfsealings cover leading portion throttling damping step-down; For the heat hydraulic pressure is further reduced; Anterior insertion ring combination is played HTHP hot water is forced plugging action
Pressure shutoff through the insertion ring combination; The leakage rate of hot water is very little; In order further to improve sealing effect and cooling effect; Anterior insertion ring combination 10 and 14 of rear portion integrated mechanical sealings can be provided with the cooling water ring 12 that communicates with interior cooling chamber 11, and it communicates with interior cooling chamber 11, and the hot water that is made up after 10 shutoff by anterior insertion ring meets with cooling water in cooling off water ring; Cool off water ring 12 not only recyclable micro-leakage hot water but also can play the effect of cooling off rotating shaft, and discharge with cooling water; Make only shutoff cooling water of rear portion integrated mechanical sealing 14; In order further to improve the sealing effect and the working life of insertion ring combination 10; Be provided with the filler adjustment sleeve 13 of can regulate insertion ring combination degree of tightness between cooling water ring 12 and the integrated mechanical sealing 14, the reliability and the working life of having improved high-temperature and high-pressure sealing device; Thereby guaranteed the normal operation of high-temperature boiler feed water pump.
Said anterior insertion ring combination 10 is formed by expanded graphite circle 101, high-carbon fibrous loop 102 stacked combination.Like this, improved the reliability of insertion ring combination high temperature high voltage resistant sealing, increased the service life.
Flow of cooling water route of the present invention is cooling chamber 17 cooling chamber 8 outside said from bearing housing, and from the interior cooling chamber 11 of water inlet 81 entering of seal 15, the cooling water ring 12 of flowing through is then discharged from the tap hole 82 of seal 15.
The above only is the preferred embodiment for the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (6)
1. high-temperature boiler feed water pump comprises the sealing configuration of axial suction casing, first stage impeller, impeller, stator, stage casing, water exit end, rotating shaft and axle, wherein; Be provided with seal arrangement and inside and outside cooling chamber in the described axle sealing structure; It is characterized in that said seal arrangement comprises the packing seal assembly parts, be provided with stuffing box gland in the said packing seal assembly parts; The stuffing box gland internal diameter is the two-stage stepped form; Described leading portion internal diameter and axle sleeve are provided with the insertion ring combination movingly in the cavity that described back segment internal diameter and shaft room form, the outer circumferential side of stuffing box gland is provided with the interior cooling chamber that is communicated with outer cooling chamber.
2. a kind of high-temperature boiler feed water pump as claimed in claim 1 is characterized in that, described axial suction sections is the multistage centrifugal pump structure.
3. a kind of high-temperature boiler feed water pump as claimed in claim 1 is characterized in that, described stuffing box gland leading portion outer circumferential side is provided with radiating fin.
4. a kind of high-temperature boiler feed water pump as claimed in claim 1; It is characterized in that; Combined mechanical sealing comprises anterior throttling damping sealing, insertion ring combination seal and rear portion integrated mechanical sealing, and insertion ring combination forwardly and rear portion integrated mechanical sealing are provided with the adjustment sleeve that the cooling water ring that communicates with interior cooling chamber and insertion ring make up degree of tightness.
5. a kind of high-temperature boiler feed water pump as claimed in claim 4 is characterized in that, described anterior insertion ring combination is formed by expanded graphite circle, high-carbon fibrous loop stacked combination.
6. like claim 3 or 4 described a kind of high-temperature boiler feed water pumps, it is characterized in that the flow of cooling water route is a cooling chamber outside the cooling chamber of bearing housing is extremely said, cooling chamber in getting into again, and through cooling water ring, discharge then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102079362A CN102734207A (en) | 2012-06-21 | 2012-06-21 | High-temperature boiler feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102079362A CN102734207A (en) | 2012-06-21 | 2012-06-21 | High-temperature boiler feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102734207A true CN102734207A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102079362A Pending CN102734207A (en) | 2012-06-21 | 2012-06-21 | High-temperature boiler feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102734207A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511324A (en) * | 2012-06-26 | 2014-01-15 | 浙江水泵总厂有限公司 | High-temperature and high-pressure combined-type mechanical sealing structure |
| CN108457865A (en) * | 2018-03-21 | 2018-08-28 | 浙江南元泵业有限公司 | High-temperature resistant pump and its cooling structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095293U (en) * | 1991-06-12 | 1992-02-05 | 机械电子工业部合肥通用机械研究所 | Multi-stage overhanging centrifugal pump |
| JPH07305691A (en) * | 1994-05-10 | 1995-11-21 | Hitachi Ltd | Fluid machine |
| CN2281431Y (en) * | 1996-03-01 | 1998-05-13 | 沈阳水泵厂 | Water supplying pump for pressure boiler |
| CN2288299Y (en) * | 1996-07-17 | 1998-08-19 | 中国石化洛阳石油化工总厂 | Combined sealing shaft sleeve |
| CN2503234Y (en) * | 2001-09-18 | 2002-07-31 | 张家港市威尔化工机械设备有限公司 | Cantilever multi-stage contrifugal pump |
| CN1828064A (en) * | 2006-04-14 | 2006-09-06 | 浙江水泵总厂有限公司 | Sealing packing ring combination for high temperature high pressure hot-water circulating pump |
-
2012
- 2012-06-21 CN CN2012102079362A patent/CN102734207A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095293U (en) * | 1991-06-12 | 1992-02-05 | 机械电子工业部合肥通用机械研究所 | Multi-stage overhanging centrifugal pump |
| JPH07305691A (en) * | 1994-05-10 | 1995-11-21 | Hitachi Ltd | Fluid machine |
| CN2281431Y (en) * | 1996-03-01 | 1998-05-13 | 沈阳水泵厂 | Water supplying pump for pressure boiler |
| CN2288299Y (en) * | 1996-07-17 | 1998-08-19 | 中国石化洛阳石油化工总厂 | Combined sealing shaft sleeve |
| CN2503234Y (en) * | 2001-09-18 | 2002-07-31 | 张家港市威尔化工机械设备有限公司 | Cantilever multi-stage contrifugal pump |
| CN1828064A (en) * | 2006-04-14 | 2006-09-06 | 浙江水泵总厂有限公司 | Sealing packing ring combination for high temperature high pressure hot-water circulating pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511324A (en) * | 2012-06-26 | 2014-01-15 | 浙江水泵总厂有限公司 | High-temperature and high-pressure combined-type mechanical sealing structure |
| CN108457865A (en) * | 2018-03-21 | 2018-08-28 | 浙江南元泵业有限公司 | High-temperature resistant pump and its cooling structure |
| CN108457865B (en) * | 2018-03-21 | 2024-03-08 | 南元泵业有限公司 | High temperature resistant pump and cooling structure thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121017 |