CN202418025U - Hydraulic model for boiler feed pump for 150 to 350-MW thermal generator set - Google Patents
Hydraulic model for boiler feed pump for 150 to 350-MW thermal generator set Download PDFInfo
- Publication number
- CN202418025U CN202418025U CN2012200054915U CN201220005491U CN202418025U CN 202418025 U CN202418025 U CN 202418025U CN 2012200054915 U CN2012200054915 U CN 2012200054915U CN 201220005491 U CN201220005491 U CN 201220005491U CN 202418025 U CN202418025 U CN 202418025U
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- China
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- main shaft
- cylindrical shell
- impeller
- hydraulic model
- bearing part
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Abstract
The utility model relates to a hydraulic model for a boiler feed pump, in particular to the hydraulic model for the boiler feed pump for a 150 to 350-MW thermal generator set. The hydraulic model comprises a main shaft, a cylinder body, multiple stages of impellers, middle sections, a pump cover, a rear cover, a drive side bearing part, and a non-drive side bearing part, wherein the cylinder body is sleeved on the main shaft; multiple stages of impellers which are sleeved on the main shaft are arranged in the cylinder body; each stage of impeller corresponds to one guide blade; the middle section is arranged between the two adjacent stages of impellers; two ends of the main shaft are connected with the drive side bearing part and the non-drive side bearing part respectively; two sides of the cylinder body are provided with sealing boxes which are sleeved on the main shaft; the drive side bearing part is fixedly connected with one side of the cylinder body; the non-drive side bearing part is connected with the other side of the cylinder body through the pump cover and the rear cover; and a water inlet pipe and a water outlet pipe which are arranged on the cylinder body are positioned on two sides of each of the stages of the impellers. By the hydraulic model, the pressure of a pipeline system behind a valve can be effectively reduced, and manufacturing cost of engineering can be reduced; and a new hydraulic model is provided for equipment choices.
Description
Technical field
The utility model relates to the hydraulic model of boiler feed pump, and a kind of specifically 150MW～350MW thermal power generation unit boiler feed pump is used hydraulic model.
Background technique
The boiler feed pump that the thermal power generation unit is used is one of great subsidiary engine of fired power generating unit.At present, the high pressure water feeding pump for boiler that 150MW～350MW thermal power generation unit is used adopts foreign technology and hydraulic model more, exists efficient narrow range, and performance curve changes problems such as unexpected.
The model utility content
The purpose of the utility model is to provide a kind of 150MW～350MW thermal power generation unit boiler feed pump that satisfies technical specification and usage requirement fully to use hydraulic model.
The purpose of the utility model realizes through following technological scheme:
The utility model comprises main shaft, cylindrical shell, multi-stage impeller, stage casing, pump cover, bonnet, inboard bearing parts and non-drive side bearing part; Wherein barrel jacket is on main shaft; Be provided with the multistage impeller that is set on the main shaft in the cylindrical shell; Every grade of all corresponding stator of impeller is the stage casing between the adjacent both stage impellers; Said balance set is installed on the bonnet through balancing drum; The two ends of main shaft are connected with inboard bearing parts and non-drive side bearing part respectively; The both sides of said cylindrical shell are separately installed with the sealed letter body that is enclosed within on the main shaft; The inboard bearing parts are fixed in a side of cylindrical shell, and the non-drive side bearing part links to each other with the opposite side of cylindrical shell through pump cover, bonnet; The both sides that lay respectively at impellers at different levels are taken in water inlet adapter of offering on the said cylindrical shell and water outlet.
Wherein: water inlet adapter of offering on the said cylindrical shell and water outlet are taken over and are positioned at the same side of cylindrical shell, and are parallel to each other;
The impeller channel of chopped-off head and secondary impeller channel opening area all enlarge 5～10% in the said multi-stage impeller; The gate vane channel opening area of said stator enlarges 5～10%; 3～5mm is widened in space between said adjacent two stage casings.
Advantage of the utility model and good effect are:
1. the utlity model has high pressure, at a high speed, characteristics of high efficiency, have efficient wide ranges and pump performance curve from maximum duty point to outlet valve close close point change mild, no hump.Impeller hydraulic model and the spatial guide blade that is complementary with it have lift that outlet valve closes close point and raise and be not higher than 25% characteristic of declared working condition point lift, have reached the basic usability requirement of system to pump.
2. under the identical situation of rotating speed, the lift that outlet valve cuts out operating mode descends than prototype.Under the situation of pump discharge lift unanimity, efficiently putting flow increases, efficient wide ranges.
3. the utility model can be installed in the cylindrical shell of former pump, and installation dimension is consistent with prototype.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Wherein: 1 is main shaft, and 2 is impeller, and 3 is balancing drum, and 4 is thrust disc, and 5 is cylindrical shell, and 6 is pump cover, and 7 is the stage casing, and 8 is stator, and 9 is balance set, and 10 is bonnet, and 11 is the sealed letter body, and 12 is the inboard bearing parts, and 13 is the non-drive side bearing part;
Fig. 2 A is that chopped-off head suction wheel shaft contrasts schematic representation to runner;
Wherein: 14 is the utility model first stage impeller, and 15 is prototype first stage impeller (dotted line), and 16 is that the chopped-off head impeller shaft is to runner;
Fig. 2 B is secondary impeller shaft orientation flowing channel contrast schematic representation;
Wherein: 17 is the secondary impeller of the utility model, and 18 is the secondary impeller of prototype (dotted line), and 19 is secondary impeller shaft orientation flowing channel;
Fig. 3 A is a return guide vane runner axial width contrast schematic representation;
Wherein: 20 is the utility model stator, and 21 is the prototype stator, and 23 is the guide vane runner;
Fig. 3 B is a guide vane runner axial width contrast schematic representation;
Wherein: 20 is the utility model stator, and 21 is the prototype stator, and 22 is the guide vane runner;
Fig. 3 C opens the contrast schematic representation for the gate vane channel people;
Wherein: 24 the utility model gate vane channels, 25 prototype gate vane channels (dotted line) for expansion for expansion;
Fig. 4 is stage casing contrast schematic representation;
Wherein: 26 is the utility model stage casing, and 27 is the prototype stage casing;
Fig. 5 installs the contrast schematic representation for the utility model hydraulic part;
Wherein: 1 is main shaft, and 20 is the utility model stator, and 21 is prototype stator (dotted line), and 26 is the utility model stage casing, and 27 is prototype stage casing (dotted line), and 28 is the utility model impeller, and 29 is prototype impeller (dotted line), and 30 is impeller ring, and 31 is the stator cover.
Fig. 6 is the performance curve contrast of the utility model hydraulic model and prototype.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to detail.
As shown in Figure 1; The utility model comprises main shaft 1, cylindrical shell 5, multi-stage impeller 2, stage casing 7, pump cover 6, bonnet 10, inboard bearing parts 12 and non-drive side bearing part 13; Its middle cylinder body 5 is enclosed within on the main shaft 1; Be provided with the multistage impeller 2 that is set on the main shaft 1 in the cylindrical shell 5, every grade of all corresponding stator 8 of impeller is stage casing 7 between the adjacent both stage impellers; Said balance set 9 is installed on the bonnet 10 through balancing drum 3; The two ends of main shaft 1 are connected with inboard bearing parts 12 and non-drive side bearing part 13 respectively; The both sides of said cylindrical shell 5 are separately installed with the sealed letter body 11 that is enclosed within on the main shaft 1; Inboard bearing parts 12 are fixed in a side of cylindrical shell 5, and non-drive side bearing part 13 links to each other with the opposite side of cylindrical shell 5 through pump cover 6, bonnet 10; Suction port of offering on the said cylindrical shell 5 and air outlet lay respectively at the both sides of impellers 2 at different levels, and water inlet adapter of offering on the cylindrical shell 5 and water outlet are taken over and be positioned at the same side of cylindrical shell 5, and are parallel to each other.
Shown in Fig. 2 A, Fig. 2 B, the impeller channel opening of the impeller channel of prototype first stage impeller and secondary impeller is 20mm, and the impeller channel of the impeller channel of the utility model first stage impeller 14 and secondary impeller 17 broadens, and opening area all enlarges 5～10%; Impeller outer diameter, front and back seal ring and axial dimension are identical with prototype.
Shown in Fig. 3 A, Fig. 3 B and Fig. 3 C, the opening of prototype gate vane channel is 24mm, and the utility model guide vane runner 22 is widened increasing, and return guide vane runner 23 is widened, and the gate vane channel opening area all enlarges 5～10%.
As shown in Figure 4,3～5mm is widened in the space of the utility model between adjacent two stage casings 7, but axially, radially installation dimension is identical with prototype.
Generally speaking, channel size changes, and installation dimension is constant to be the key character of the utility model.
The working principle of the utility model is:
The utility model is to improve to receded disk impeller and with the runner of the open type stator of its coupling; When impeller channel is widened; Its hydraulic loss under big flow reduces; Equally, be responsible for the open type stator of energy recovery and inlet, the discharge area of the runner that the stage casing is formed and strengthen the energy loss that also plays under the big flow of reduction.On the contrary, hydraulic loss strengthened when such improvement caused small flow, thereby reached the purpose that reduces the lift when closing the pump discharge valve, promptly made the flow lift curve decline of this pump slow down.The performance curve contrast is as shown in Figure 6.
As can be seen from Figure 6, under the identical situation of rotating speed, the lift that outlet valve cuts out operating mode has descended 5% than prototype.Under the situation of pump discharge lift unanimity, efficiently putting flow has increased by 15%.Effectively reduce the pressure of pipe-line system behind the valve, help reducing the cost of engineering, simultaneously, the new model that also provides for the type selecting of equipment.
The utility model is except the part that is marked, and all the other each parts are all general with former pump, that is to say that only on hydraulic part, having carried out new design both can reach the increase design discharge, pipe-line system pressure behind the reduction valve, the purpose in the efficient district of broadening.
The utility model is applicable to the high pressure water feeding pump for boiler of subcritical fired power generating unit of 150MW～350MW and identical parameters.
Claims (5)
1. 150MW～350MW thermal power generation unit boiler feed pump is used hydraulic model; It is characterized in that: comprise main shaft (1), cylindrical shell (5), multi-stage impeller (2), stage casing (7), pump cover (6), bonnet (10), inboard bearing parts (12) and non-drive side bearing part (13); Its middle cylinder body (5) is enclosed within on the main shaft (1); Be provided with the multistage impeller (2) that is set on the main shaft (1) in the cylindrical shell (5), every grade of all corresponding stator (8) of impeller is stage casing (7) between the adjacent both stage impellers; Said balance set (9) is installed on the bonnet (10) through balancing drum (3); The two ends of main shaft (1) are connected with inboard bearing parts (12) and non-drive side bearing part (13) respectively; The both sides of said cylindrical shell (5) are separately installed with the sealed letter body (11) that is enclosed within on the main shaft (1); Inboard bearing parts (12) are fixed in a side of cylindrical shell (5), and non-drive side bearing part (13) links to each other with the opposite side of cylindrical shell (5) through pump cover (6), bonnet (10); The both sides that lay respectively at impellers at different levels (2) are taken in water inlet adapter of offering on the said cylindrical shell (5) and water outlet.
2. use hydraulic model, it is characterized in that by the described 150MW of claim 1～350MW thermal power generation unit boiler feed pump: water inlet adapter of offering on the said cylindrical shell (5) and water outlet are taken over and are positioned at the same side of cylindrical shell (5), and are parallel to each other.
3. use hydraulic model, it is characterized in that by claim 1 or 2 described 150MW～350MW thermal power generation unit boiler feed pump: the impeller channel of chopped-off head and secondary impeller channel opening area all enlarge 5～10% in the said multi-stage impeller.
4. use hydraulic model, it is characterized in that by claim 1 or 2 described 150MW～350MW thermal power generation unit boiler feed pump: the gate vane channel opening area of said stator (8) enlarges 5～10%.
5. use hydraulic model, it is characterized in that by claim 1 or 2 described 150MW～350MW thermal power generation unit boiler feed pump: 3～5mm is widened in the space between said adjacent two stage casings (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200054915U CN202418025U (en) | 2012-01-06 | 2012-01-06 | Hydraulic model for boiler feed pump for 150 to 350-MW thermal generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200054915U CN202418025U (en) | 2012-01-06 | 2012-01-06 | Hydraulic model for boiler feed pump for 150 to 350-MW thermal generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202418025U true CN202418025U (en) | 2012-09-05 |
Family
ID=46742795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200054915U Expired - Lifetime CN202418025U (en) | 2012-01-06 | 2012-01-06 | Hydraulic model for boiler feed pump for 150 to 350-MW thermal generator set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202418025U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159595A (en) * | 2019-05-29 | 2019-08-23 | 江苏大学 | A kind of multistage pump return guide vane increasing runner and runner increase method |
-
2012
- 2012-01-06 CN CN2012200054915U patent/CN202418025U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159595A (en) * | 2019-05-29 | 2019-08-23 | 江苏大学 | A kind of multistage pump return guide vane increasing runner and runner increase method |
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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 |
Granted publication date: 20120905 |
|
| CX01 | Expiry of patent term |