CN204851745U - There is stove water pump of holding up positive axial to hold pump end high -temperature region - Google Patents
There is stove water pump of holding up positive axial to hold pump end high -temperature region Download PDFInfo
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- CN204851745U CN204851745U CN201520503640.4U CN201520503640U CN204851745U CN 204851745 U CN204851745 U CN 204851745U CN 201520503640 U CN201520503640 U CN 201520503640U CN 204851745 U CN204851745 U CN 204851745U
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- pump
- guide shoe
- temperature zone
- bearing
- pump housing
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Abstract
The utility model belongs to thermal power auxiliary assembly, in particular to a to there is stove water pump of holding up positive axial to hold pump end high -temperature region, the motor and the pump body including the coaxial setting of integral type, be equipped with the hot neck that is used for reducing heat conduction between the pump body and the motor, motor spindle passes the centre bore of hot neck, and extends to be connected with synchronous rotation of the impeller of the pump body in the inner chamber of the pump body, pump body inner chamber is close to promptly to the one end of hot neck one end still is equipped with and is used for extending the section to the main shaft and carries out the high -temperature region bearing supported, the high -temperature region bearing is made by wear -resisting, high temperature resistant metal material. The utility model discloses it establishes the high -temperature region bearing to add in the pump body of stove water pump for overhang section to motor spindle is supported, has avoided the problem of motor spindle because of the great oscillation generation of degree of disturbing, the stability and the security of the stove water pump of improvement.
Description
Technical field
The utility model belongs to thermal power generation supplementary equipment, is related specifically to a kind of stove water pump being applied to large turbine-generator set boiler.
Background technique.
Stove water pump is mounted in for carrying the visual plant of High Temperature High Pressure stove water in large turbine-generator set boiler main pipe-line system, and boiler pump motor is the drive motor of boiler water circulating pump.Working medium due to boiler water circulating pump conveying is the stove water of more than 300 DEG C High Temperature High Pressure, and the technology that the connecting portion between pump case and drive motor is just current, can't effectively seal.Therefore the connecting portion between the pump housing of stove water pump both domestic and external and boiler pump motor all adopts the structure of no-arbitrary pricing letter, and stove water pump pump case and boiler pump motor shell connect into a seal chamber interconnected.Utilize the incompressibility of water to seal, boiler pump motor need adopt wet stator structure.Stove water pump vane is arranged on the top of rotor axis of electric, coaxial with rotor.In prior art, adopt the insulating material of the motor winding in wet stator structure boiler pump motor cannot tolerate more than 100 DEG C high temperature, therefore the stator of boiler pump motor and winding thereof must directly sealing be arranged on temperature and will remain in less than 60 DEG C water.The upper and lower cooling water of boiler pump motor adopts closed cycle mode cooling by the heat exchanger being contained in motor side for this reason, keeps the temperature of water to be no more than 60 DEG C.For alleviating the burden of heat exchanger, more than 300 DEG C, between high temperature pump case and the drive motor body of less than 60 DEG C, being provided with the thermoscreen section of trap heat, being commonly referred to hot neck.Along with the progress of generation technology, large turbine-generator set is to overcritical, ultra supercritical development, and the temperature of boiler water brings up to 400 DEG C, even up to 500 DEG C from current 320 DEG C.In order to the requirement of satisfied heat radiation, reduce heat transmission to motor part from the pump case position of high temperature, thermoscreen section needs to lengthen, and the shaft extension section of rotor shaft need lengthen thereupon for this reason, and therefore rotor shaft degree of disturbing increases, and is unfavorable for the safe operation of unit.
Model utility content
The purpose of this utility model is to provide the good stove water pump of a kind of main shaft stability.
For achieving the above object, the utility model provides following technological scheme: a kind of stove water pump, comprise motor and the pump housing of integrated coaxial setting, the transition section shell for reducing heat conduction is provided with between the described pump housing and the housing of motor, this transition section shell is called hot neck, and described hot neck is the tubular structure coaxial with the main shaft of motor; Described main shaft adopts the bearing at two motor two ends that are placed in be arranged in motor cavity, and main shaft is through the center hole of hot neck, and extend in the inner chamber of the described pump housing and be connected with the impeller synchronous axial system of the pump housing, be Spielpassung between described main shaft and hot neck center hole, described hot neck is also provided with the high-temperature zone bearing for helping main shaft extension near one end of the pump housing, and described high-temperature zone bearing is made up of wear-resisting, exotic material.
Technique effect of the present utility model is: the utility model adds high-temperature zone bearing in the pump housing of stove water pump, for helping the overhanging section of electric machine main shaft, and high-temperature zone bearing main material is metal, avoid the brittle fracture of the high-temperature bearing that the materials such as pottery make, it also avoid electric machine main shaft because of the larger and vibrative problem of degree of disturbing, the stability of the stove water pump of raising and Security.
Accompanying drawing explanation
Fig. 1 is sectional view of the present utility model;
Fig. 2 is the I partial enlarged view of Fig. 1.
Embodiment
As shown in Figure 1, a kind of stove water pump, comprise motor 10 and the pump housing 20 of integrated coaxial setting, the transition section shell for reducing heat conduction is provided with between the described pump housing 20 and the housing of motor 10, this transition section shell is called hot neck 30, and described hot neck 30 is tubular structures coaxial with the main shaft 11 of motor 10; Described main shaft 11 adopts the bearing 12 at two motor 10 two ends that are placed in be arranged in motor 10 inner chamber, and main shaft 11 is through the center hole of hot neck 30, and extend in the inner chamber of the described pump housing 20 and be connected with impeller 21 synchronous axial system of the pump housing 20, be Spielpassung between described main shaft 11 and hot neck 30 center hole, described hot neck 30 is also provided with the high-temperature zone bearing 22 for helping main shaft 11 extension near one end of the pump housing 20, and described high-temperature zone bearing 22 is made up of wear-resisting, refractory metal material.The utility model adds high-temperature zone bearing 22 in the pump housing 20 of stove water pump, and the overhanging section for the main shaft 11 to motor 10 is helped, and avoids main shaft 11 because of the larger and vibrative problem of degree of disturbing, the stability of the stove water pump of raising and Security.
Further, as shown in Figure 2, described hot neck 30 is provided with near one end of the pump housing 20 vertically to the tubulose guide shoe 31 that the pump housing 20 inner chamber extends, described guide shoe 31 is coaxial and the center hole of guide shoe 31 is shoulder hole with hot neck 30, described high-temperature zone bearing 22 is arranged in the shoulder hole of this guide shoe 31, and the shoulder that the end face of high-temperature zone bearing 22 is resisted against this shoulder hole realizes axial limiting.Be arranged on by high-temperature zone bearing in guide shoe 31, guide shoe 31 protrudes out to direction, impeller 21 place, can ensure high-temperature zone bearing 22 to greatest extent close to impeller 21, to greatest extent improve main shaft 11 stability.
Further, as shown in Figure 2, labyrinth ring 23 is also provided with between described high-temperature zone bearing 22 and pump housing impeller 21, described labyrinth ring 23 is connected with described main shaft 11 synchronous axial system, described labyrinth ring 23 is also positioned at the shoulder hole of guide shoe 31, and the outer ring surface of described labyrinth ring 23 and the hole wall of guide shoe 31 shoulder hole form Spielpassung.Because high-temperature zone bearing 22 is very near apart from impeller 21, therefore the high-temperature liquid cognition in pump 20 intracoelomic cavity produces violent impact to the direction at high-temperature zone bearing 22 place, add labyrinth ring 23 and can provide certain damping and buffering for this high temperature, high pressure liquid stream, reduce the impact to high-temperature zone bearing 22, and then improve the working life of bearing.
Further, as shown in Figure 2, the top of described guide shoe 31 is provided with Flange-shaped Parts flange 311, and the outer ring surface of described flange 311 and the inner walls of the pump housing 20 form Spielpassung.
Further, as shown in Figure 2, the side end face that described impeller 21 is relative with guide shoe 31 is provided with bulge loop 211, and described bulge loop 211 extends in the shoulder hole of guide shoe 31, and the hole wall of the outer ring surface of described bulge loop 211 and the shoulder hole of guide shoe 31 forms Spielpassung.Gap between bulge loop 22 and guide shoe 31 can reduce the impact of working solution to high-temperature zone bearing 22 further.
Further, as shown in Figure 2, the housing of the described pump housing 20 is provided with detect aperture 24 with guide shoe 31 corresponding position, the end face of described guide shoe 31, flange 311, hot neck 30 and the inner walls of the pump housing 20 enclose an annular water chamber jointly, described detect aperture 24 the inner is communicated with this annular water chamber, described detect aperture 24 outer termination pressure gauge and/or thermometer.Working solution flow velocity in the pump housing 20 inner chamber is very fast, not easily detects, but, after working solution enters the static annular water chamber in four sides by gap, just become relatively stable, be conducive to gathering temperature, pressure and other parameters.
Claims (6)
1. there is the stove water pump of alignment bearing a pump end high-temperature zone, comprise motor (10) and the pump housing (20) of integrated coaxial setting, the transition section shell for reducing heat conduction is provided with between the housing of the described pump housing (20) and motor (10), this transition section shell is called hot neck (30), and described hot neck (30) is the tubular structure coaxial with the main shaft of motor (10) (11), described main shaft (11) adopts the bearing (12) at two motor that is placed in (10) two ends to be arranged in motor (10) inner chamber, and main shaft (11) is through the center hole of hot neck (30), and extend in the inner chamber of the described pump housing (20) and be connected with impeller (21) synchronous axial system of the pump housing (20), be Spielpassung between described main shaft (11) and hot neck (30) center hole, it is characterized in that: the upper one end near the pump housing (20) of described hot neck (30) is also provided with the high-temperature zone bearing (22) for helping main shaft (11) extension, described high-temperature zone bearing (22) is by wear-resisting, exotic material is made.
2. there is the stove water pump of alignment bearing pump end high-temperature zone according to claim 1, it is characterized in that: the upper one end near the pump housing (20) of described hot neck (30) is provided with vertically to the tubulose guide shoe (31) that the pump housing (20) inner chamber extends, described guide shoe (31) is coaxial and the center hole of guide shoe (31) is shoulder hole with hot neck (30), described high-temperature zone bearing (22) is arranged in the shoulder hole of this guide shoe (31), and the shoulder that the end face of high-temperature zone bearing (22) is resisted against this shoulder hole realizes axial limiting.
3. there is the stove water pump of alignment bearing pump end high-temperature zone according to claim 2, it is characterized in that: between described high-temperature zone bearing (22) and pump housing impeller (21), be also provided with labyrinth ring (23), described labyrinth ring (23) is connected with described main shaft (11) synchronous axial system, described labyrinth ring (23) is also positioned at the shoulder hole of guide shoe (31), and the outer ring surface of described labyrinth ring (23) and the hole wall of guide shoe (31) shoulder hole form Spielpassung.
4. there is the stove water pump of alignment bearing pump end high-temperature zone according to claim 3, it is characterized in that: the top of described guide shoe (31) is provided with Flange-shaped Parts flange (311), the outer ring surface of described flange (311) and the inner walls of the pump housing (20) form Spielpassung.
5. there is the stove water pump of alignment bearing pump end high-temperature zone according to claim 4, it is characterized in that: the side end face that described impeller (21) is relative with guide shoe (31) is provided with bulge loop (211), described bulge loop (211) extends in the shoulder hole of guide shoe (31), and the hole wall of the outer ring surface of described bulge loop (211) and the shoulder hole of guide shoe (31) forms Spielpassung.
6. there is the stove water pump of alignment bearing pump end high-temperature zone according to claim 5, it is characterized in that: the housing of the described pump housing (20) is provided with detect aperture (24) with guide shoe (31) corresponding position, the end face of described guide shoe (31), flange (311), hot neck (30) and the inner walls of the pump housing (20) enclose an annular water chamber jointly, described detect aperture (24) the inner is communicated with this annular water chamber, described detect aperture (24) outer termination pressure gauge and/or thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520503640.4U CN204851745U (en) | 2015-07-10 | 2015-07-10 | There is stove water pump of holding up positive axial to hold pump end high -temperature region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520503640.4U CN204851745U (en) | 2015-07-10 | 2015-07-10 | There is stove water pump of holding up positive axial to hold pump end high -temperature region |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204851745U true CN204851745U (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520503640.4U Active CN204851745U (en) | 2015-07-10 | 2015-07-10 | There is stove water pump of holding up positive axial to hold pump end high -temperature region |
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| Country | Link |
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| CN (1) | CN204851745U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038957A (en) * | 2017-06-11 | 2018-12-18 | 何巨堂 | The shield electric machine and its shielded electric pump of cold house outside electric machine casing inner stator half way |
| CN109209908A (en) * | 2018-07-27 | 2019-01-15 | 合肥皖化电机技术开发有限责任公司 | A kind of shaft auxiliary device for furnace water pump |
-
2015
- 2015-07-10 CN CN201520503640.4U patent/CN204851745U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038957A (en) * | 2017-06-11 | 2018-12-18 | 何巨堂 | The shield electric machine and its shielded electric pump of cold house outside electric machine casing inner stator half way |
| CN109038957B (en) * | 2017-06-11 | 2020-12-25 | 何巨堂 | Shielded motor of half-stroke external cooling chamber for motor shell internal stator and shielded electric pump thereof |
| CN109209908A (en) * | 2018-07-27 | 2019-01-15 | 合肥皖化电机技术开发有限责任公司 | A kind of shaft auxiliary device for furnace water pump |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |