CN203257754U - Heat shield structure for main water-feeding pump - Google Patents
Heat shield structure for main water-feeding pump Download PDFInfo
- Publication number
- CN203257754U CN203257754U CN 201320182291 CN201320182291U CN203257754U CN 203257754 U CN203257754 U CN 203257754U CN 201320182291 CN201320182291 CN 201320182291 CN 201320182291 U CN201320182291 U CN 201320182291U CN 203257754 U CN203257754 U CN 203257754U
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- CN
- China
- Prior art keywords
- coolant jacket
- pump
- cooling chamber
- shield structure
- heat shield
- 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 discloses a heat shield structure for a main water-feeding pump in the field of nuclear power equipment. The heat shield structure is connected with a pump shaft of the main water-feeding pump in a sleeved mode and comprises a pump cover, a cooling cavity gland and a cooling sleeve. The cooling cavity gland is fixed on the front end face of the pump cover, the cooling sleeve is located on the inner side of the cooling cavity gland, the inner periphery of the cooling sleeve is connected with the pump shaft in a sleeved mode, the outer periphery of the cooling sleeve is fixed to the inner periphery of the cooling cavity gland and the inner periphery of the pump cover simultaneously, a cooling cavity is defined by the inner periphery of the cooling cavity gland, the front end face of the pump cover and the outer periphery of the cooling sleeve in an enclosed mode, and the cooling cavity is connected with a heat exchanger through a water inlet through hole and a water outlet through hole which are located in the pump cover. The heat shield structure has the advantages that before high-pressure liquid water conveyed by the main water-feeding pump washes a mechanical seal, the temperature of the high-pressure liquid water is decreased below 80 DEG C, and therefore effectiveness of the mechanical seal is guaranteed.
Description
Technical field
The utility model relates to a kind of heat shield structure for main feed pump in nuclear power equipment field.
Background technique
Main feed pump is non-nuclear level pump, the major function of main feed pump is in pressurized-water reactor nuclear power plant: the water that comes to oxygen-eliminating device pressurizes, then the water that comes of oxygen-eliminating device enters high-pressure heater and steam generator, makes the steam generator generating steam go to drive the main steam turbine generating of nuclear power station.And in the stage in period of a loop reactor shutdown, what the waste heat in the heap also can make main feed pump gives water generates steam, and the heat of a loop medium is derived, and plays the effect in cooling one loop.Moreover be when the accident conditionses such as the unexpected removal of load of main steam turbine or generating steam pipeline breaking, main feed pump also can play the effect that unnecessary heat is derived.Therefore, the operational reliability of main feed pump is very important.
Main feed pump is provided with mechanical seal.Because main feed pump moves under high pressure conditions, so the described high-pressure liquid water that send of main feed pump, nearly 180 ℃ of its temperature.In order to guarantee the validity of mechanical seal, to carrying out in the mechanical seal when washing, how the temperature of high-pressure liquid water can not greater than 80 ℃, therefore carry out before flushing at the shaft seal end face to gland seal device.The temperature that fully reduces high-pressure liquid water also is a technological difficulties problem in the main feed pump design.
The model utility content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of heat shield structure for main feed pump is provided, before it can wash mechanical seal at the high-pressure liquid water that main feed pump is carried, the temperature of high-pressure liquid water is fully reduced, thereby guarantee the validity of mechanical seal
A kind of technological scheme that realizes above-mentioned purpose is: a kind of heat shield structure for main feed pump on the pump shaft of this heat shield structure socket main feed pump, comprises pump cover, cooling chamber gland and coolant jacket;
Described cooling chamber gland is fixed on the front-end face of described pump cover, it is inboard that described coolant jacket is positioned at described cooling chamber gland, the inner circumference of described coolant jacket and the socket of described pump shaft, the inner circumference of the excircle of described coolant jacket and described cooling chamber gland, and the inner circumference of described pump cover is fixing simultaneously, the excircle of the inner circumference of described cooling chamber gland, the front-end face of described pump cover and described coolant jacket surrounds a cooling chamber, and this cooling chamber is connected with heat exchanger with the water outlet through hole by the water inlet through hole that is positioned on the described pump cover.
Further, the excircle of described coolant jacket is provided with the choked flow groove of some annulars, described choked flow groove axially being arranged in order along described coolant jacket.
Further, the front-end face of the front-end face of described cooling chamber gland and described coolant jacket is fixed by the coolant jacket nut.
Adopt the technological scheme of a kind of heat shield structure for main feed pump of the present utility model, namely set up a cooling chamber at the front end of pump cover, the technological scheme that this cooling chamber is connected with heat exchanger by the water inlet through hole on the pump cover and water outlet through hole.Its technique effect is: it can carry out mechanical seal at the high-pressure liquid water that main feed pump is carried before flushing the temperature of high-pressure liquid water being reduced to below 80 ℃, thereby guarantees the validity of mechanical seal.
Description of drawings
Fig. 1 is the structural representation of a kind of heat shield structure for main feed pump of the present utility model.
Embodiment
See also Fig. 1, inventor of the present utility model be in order to understand the technical solution of the utility model better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
See also Fig. 1, a kind of heat shield structure for main feed pump of the present utility model, be used for carrying out to the mechanical seal (not shown) before flushing at the high-pressure liquid water that main feed pump is carried with self, high-pressure liquid water is lowered the temperature fully, make below the drop in temperature to 80 ℃ of the high-pressure liquid water that mechanical seal is washed.Be connected with supporting heat exchanger (not shown) on this heat shield structure.
A kind of heat shield structure for main feed pump of the present utility model comprises pump cover 1, cooling chamber gland 2 and coolant jacket 3.
Simultaneously, the excircle of coolant jacket 3 is provided with the choked flow groove 31 of some annulars, and choked flow groove 31 axially is arranged in order along coolant jacket 3.Choked flow groove 31 increases the heat exchange area of coolant jacket 3, make in the radial clearance between pump shaft 10 and the coolant jacket 3 high-pressure liquid water can with cooling chamber 100 in cooling water carry out more sufficient heat exchange, described gland seal device is carried out oneself temperature when washing with the radial clearance mesohigh liquid water between further reduction pump shaft 10 and the coolant jacket 3.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the utility model, and be not to be used as restriction 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 (4)
1. a heat shield structure that is used for main feed pump on the pump shaft (10) of this heat shield structure socket main feed pump, comprises pump cover (1), cooling chamber gland (2) and coolant jacket (3); It is characterized in that:
Described cooling chamber gland (2) is fixed on the front-end face of described pump cover (1), described coolant jacket (3) is positioned at described cooling chamber gland (2) inboard, the inner circumference of described coolant jacket (3) and described pump shaft (10) socket, the inner circumference of the excircle of described coolant jacket (3) and described cooling chamber gland (2), and the inner circumference of described pump cover (1) is fixing simultaneously, the inner circumference of described cooling chamber gland (2), the excircle of the front-end face of described pump cover (1) and described coolant jacket (3) surrounds a cooling chamber (100), and this cooling chamber (100) is connected with heat exchanger with the water outlet through hole by the water inlet through hole that is positioned on the described pump cover (1).
2. a kind of heat shield structure for main feed pump according to claim 1 is characterized in that: the inner circumference of described coolant jacket (3) and described pump shaft (10) radially between be provided with the nockbush (4) that is socketed on the described pump shaft (10).
3. a kind of heat shield structure for main feed pump according to claim 1, it is characterized in that: the excircle of described coolant jacket (3) is provided with the choked flow groove (31) of some annulars, described choked flow groove (31) axially being arranged in order along described coolant jacket (3).
4. a kind of heat shield structure for main feed pump according to claim 1 is characterized in that: the front-end face of the front-end face of described cooling chamber gland (2) and described coolant jacket (3) is fixing by coolant jacket nut (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320182291 CN203257754U (en) | 2013-04-12 | 2013-04-12 | Heat shield structure for main water-feeding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320182291 CN203257754U (en) | 2013-04-12 | 2013-04-12 | Heat shield structure for main water-feeding pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257754U true CN203257754U (en) | 2013-10-30 |
Family
ID=49470323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320182291 Expired - Lifetime CN203257754U (en) | 2013-04-12 | 2013-04-12 | Heat shield structure for main water-feeding pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257754U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930979A (en) * | 2015-12-29 | 2017-07-07 | 杭州三花家电热管理系统有限公司 | Fluid pump and household electrical appliance |
-
2013
- 2013-04-12 CN CN 201320182291 patent/CN203257754U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930979A (en) * | 2015-12-29 | 2017-07-07 | 杭州三花家电热管理系统有限公司 | Fluid pump and household electrical appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |