CN1439809A - Multistage segmental centrifugal pump - Google Patents
Multistage segmental centrifugal pump Download PDFInfo
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- CN1439809A CN1439809A CN 02114681 CN02114681A CN1439809A CN 1439809 A CN1439809 A CN 1439809A CN 02114681 CN02114681 CN 02114681 CN 02114681 A CN02114681 A CN 02114681A CN 1439809 A CN1439809 A CN 1439809A
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- impeller
- rear portion
- anterior
- progression
- centrifugal pump
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Abstract
A multi-stage segmental centrifugal pump is composed of front and back single-suction multi-stage segmental centrifugal pumps, which have a common mainshaft and opposite inlets. The final-stage vane wheel of said front unit has a back sealing ring and an unloading tube is installed to the unloading hole in the range of back sealing ring.
Description
Technical field
The invention is the single suction multistage segmental centrifugal pump that hop count is more, is divided into front and rear, forms the novel sectional type multistage centrifugal pump that hop count doubles by two less single suction multistage segmental centrifugal pumps of hop count independent of each other.
Technical background
In the prior art, all impellers of single suction multistage segmental centrifugal pump are installed on the pump shaft equidirectionally, and impeller at different levels has only preceding seal ring, come balancing axial thrust with Balance disc or balancing drum always.The scroll casing type multistage pump adopts the method for impeller symmetric arrangement to eliminate and acts on epitrochanterian axial force, when progression i is even number, all impellers are single suction formulas, when i was odd number, first order impeller was a double-sucking type, and progression is many more, structure is complicated more, manufacturability is poor more, therefore, only is applicable to the multistage pump that hop count is less.In recent years, there is the method that on every grade of impeller of single suction multistage segmental centrifugal pump, installs increasing back sealing ring or back blade additional that total axial force of multistage pump is tended to balance, residual axial force is born by thrust-bearing, but these methods still only are applicable to the single suction multistage segmental centrifugal pump that hop count is less.
Summary of the invention
The present invention is a kind of multistage segmental centrifugal pump, comprise another group single suction multistage segmental centrifugal pump of arranging fore one group of single suction multistage segmental centrifugal pump and being arranged in the rear portion, it is characterized in that the front portion, the shared rotating shaft in rear portion, the importer of all anterior impellers is to an end that points to rotating shaft, the water intake direction of all impellers at rear portion is pointed to the other end of rotating shaft, anterior linkage section with the rear portion is equipped with rolling bearing, anterior impeller is equipped with increasing back sealing ring, forwardly the increasing back sealing ring scope that extrudes section is to open unloading hole on the interior pump housing, and the off-load pipe is installed on the unloading hole.
According to above-described multistage segmental centrifugal pump, it is characterized in that: when progression i is odd number, the span of i is 5-19, the anterior progression of installing is (i+1)/2 grade, the progression that install at the rear portion is (i-1)/2 grade, the water intake direction of all anterior impellers is pointed to driving end, except that impeller, be provided with stator behind first stage impeller and other impeller outlets at different levels, impeller is contained in the volute pumping chamber, and the water intake of rear portion impeller points to anterior opposite, and the rear portion is except that impeller, be provided with stator behind first stage impeller and other impeller outlets at different levels, impeller is contained in the volute pumping chamber.The cooling jacket of the rolling bearing on the linkage section at anterior and rear portion is connected with the cooling jacket of front and rear portions stuffing box and rolling bearing.
According to above-described multistage segmental centrifugal pump, it is characterized in that: when total progression i is even number, the span of i is 4-20, anterior, the progression that install at the rear portion respectively is the i/2 level, the impeller intake of its middle front part points to driving end, be provided with stator behind first stage impeller and other impeller outlets at different levels, impeller is contained in the volute pumping chamber, be provided with stator behind the first stage impeller at rear portion and other impeller outlets at different levels, the impeller at rear portion is contained in the volute pumping chamber, on the impeller back shroud of rear portion back blade is installed, anterior impeller is equipped with increasing back sealing ring and has the off-load pipe to adjust the increasing back sealing ring scope with interior pressure, on the linkage section at anterior and rear portion the cooling jacket of rolling bearing with before, the cooling jacket of rear portion stuffing box and rolling bearing interconnects.
According to above-described multistage segmental centrifugal pump, it is characterized in that: when total progression i is odd number, the span of i is 5-19, anterior progression can be (i-1)/2 grade, the progression at rear portion is (i+1)/2 grade, the location swap of the front portion when the above i is odd number, the impeller at rear portion and extrusion section, the off-load pipe is installed in the rear portion.
According to above-described multistage segmental centrifugal pump, it is characterized in that: when total progression i is even number, the span of i is 4-20, anterior progression is the i/2 level, the progression at rear portion is the i/2 level, the not level impeller at the front portion when the above i is even number, rear portion and the location swap of extrusion section, the off-load pipe is installed in the rear portion.
Description of drawings
Fig. 1 is the scheme of erection of single suction multistage segmental centrifugal pump in the prior art, is to come balancing axial thrust with Balance disc.Fig. 2 is the scheme of erection of scroll casing type multistage centrifugal pump in the prior art, and Fig. 3 is several structures of 6 grades of scroll casing type multistage pump impeller symmetric arrangement.Fig. 4 is first a kind of embodiment's of the present invention erection drawing.Fig. 5 is second a kind of embodiment's of the present invention erection drawing.Fig. 6 is the third an embodiment's of the present invention erection drawing.Fig. 7 is the 4th a kind of embodiment's of the present invention erection drawing.
Specific implementation
As shown in Figure 4, it is first kind of embodiment's of the present invention erection drawing, when total progression i is odd number, the span of i is 5-19, and anterior 1 progression is installed be (i+1)/2 grade, and rear portion 2 installation progression are (i-1)/2 grade, the water intake of all single suction impellers of its middle front part 1 all points to driving end, except that impeller 1-3, be provided with stator after first stage impeller 1-1 and other impeller 1-2 outlets at different levels, impeller 1-3 is contained in the volute pumping chamber.The water intake of rear portion 2 impellers points to anterior opposite.The rear portion is provided with stator after first stage impeller 2-1 and other impeller 2-2 outlets at different levels except that impeller 2-3, impeller 2-3 is contained in the volute pumping chamber.Anterior impeller 1-3 is equipped with increasing back sealing ring 1-4, and off-load pipe 4 is adjusted the increasing back sealing ring scope with interior pressure, and the axial force of whole pump goes to zero when making design conditions.The cooling jacket of front and rear portions linkage section 3 rolling bearings is connected with the cooling jacket of front and rear portions stuffing box and rolling bearing.
As shown in Figure 5, it is second kind of embodiment's of the present invention erection drawing, when total progression i is even number, the span of i is 4-20, front and rear portions respectively has the i/2 level, the impeller intake of its middle front part 1 all points to driving end, is provided with stator after first stage impeller 1-1 and other impeller 1-2 outlets at different levels, and impeller 1-3 is contained in the volute pumping chamber.Be provided with stator after rear portion first stage impeller 2-1 and other impeller 2-2 outlets at different levels, rear portion impeller 2-3 is contained in the volute pumping chamber.Rear portion impeller 2-3 back shroud is installed back blade 2-4.Anterior impeller 1-3 is equipped with increasing back sealing ring 1-4 and has off-load pipe 4 to adjust increasing back sealing ring 1-4 scope with interior pressure, and total axial force of whole pump goes to zero when making design conditions.The cooling jacket of front and rear portions linkage section 3 rolling bearings and the cooling jacket of front and rear portions stuffing box and rolling bearing interconnect.
As shown in Figure 6, it is the third embodiment's of the present invention erection drawing, when total progression i is odd number, the span of i is 5-19, anterior progression is (i-1)/2 grade, rear portion progression is (i+1)/2 grade, compares just the front and rear portions impeller with Fig. 4 and extrudes the location swap of section, and the off-load pipe is installed in the rear portion.
When total progression i of the 4th kind of embodiment of the present invention was even number, the span of i was 4-20, and anterior progression is i/2, and rear portion progression is the i/2 level, compared just the front and rear portions impeller with Fig. 5 and extruded the location swap of section, and the off-load pipe is installed in the rear portion.
The invention based on centrifugal pump axial force when back blade and increasing back sealing ring are arranged with the various quantitative recognitions that the related parameter Changing Pattern is arranged, take into account scroll casing type multistage pump and sectional type multistage pump advantage separately, make high hop count multistage pump axial for going to zero when design conditions, when the off-design operating mode and seal ring when wearing and tearing take place the value of axial force also very little, bear by thrust-bearing, thereby no axial float in service, running state is very steady, operational reliability increases, be applicable to the upright of the more all size model of progression, horizontal type multi-stage pump, the progression of multistage pump might further be increased, and efficient is than Fig. 1, Fig. 2, multistage pump shown in Figure 3 has tangible raising.
Claims (5)
1, the present invention is a kind of multistage segmental centrifugal pump, comprise another group single suction multistage segmental centrifugal pump that is arranged in one group of single suction multistage segmental centrifugal pump of anterior 1 and is arranged in rear portion 2, it is characterized in that anterior 1, rear portion 2 shared rotating shafts, the importer of all impellers of anterior 1 is to an end that points to rotating shaft, the water intake direction of all impellers at rear portion 2 is pointed to the other end of rotating shaft, front portion 1 is equipped with rolling bearing 3-1 with the linkage section 3 at rear portion 2, anterior 1 impeller 1-3 is equipped with increasing back sealing ring 1-4, forwardly the 1 increasing back sealing ring 1-4 scope that extrudes section is to open unloading hole on the interior pump housing, and off-load pipe 4 is installed on the unloading hole.
2, multistage segmental centrifugal pump according to claim 1, it is characterized in that: when progression i is odd number, the span of i is 5-19, anterior 1 progression of installing is (i+1)/2 grade, the progression that install at rear portion 2 is (i-1)/2 grade, the water intake direction of all impellers of anterior 1 is pointed to driving end, except that impeller 1-3, be provided with stator after first stage impeller 1-1 and other impeller 1-2 outlets at different levels, impeller 1-3 is contained in the volute pumping chamber, the water intake of rear portion 2 impellers points to opposite with anterior 1, rear portion 2 is except that impeller 2-3, be provided with stator after first stage impeller 2-1 and other impeller 2-2 outlets at different levels, impeller 2-3 is contained in the volute pumping chamber.Anterior 1 with the linkage section 3 at rear portion 2 on the cooling jacket of rolling bearing 3-1 be connected with the cooling jacket of front and rear portions stuffing box and rolling bearing.
3, multistage segmental centrifugal pump according to claim 1, it is characterized in that: when total progression i is even number, the span of i is 4-20, anterior 1, the progression that install at rear portion 2 respectively is the i/2 level, the impeller intake of its middle front part 1 points to driving end, be provided with stator after first stage impeller 1-1 and other impeller 1-2 outlets at different levels, impeller 1-3 is contained in the volute pumping chamber, be provided with stator after the first stage impeller 2-1 at rear portion 2 and other impeller 2-2 outlets at different levels, the impeller 2-3 at rear portion 2 is contained in the volute pumping chamber, back blade 2-4 is installed on the impeller 2-3 back shroud of rear portion, anterior 1 impeller 1-3 is equipped with increasing back sealing ring 1-4 and has off-load pipe 4 to adjust increasing back sealing ring 1-4 scopes with interior pressure, anterior 1 with the linkage section 3 at rear portion 2 on rolling bearing 3-1 cooling jacket with before, the cooling jacket of rear portion stuffing box and rolling bearing interconnects.
4, multistage segmental centrifugal pump according to claim 1, it is characterized in that: when total progression i is odd number, the span of i is 5-19, anterior progression can be (i-1)/2 grade, the progression at rear portion is (i+1)/2 grade, with the impeller at the described front portion of claim 2, rear portion and the location swap of extrusion section, off-load pipe 4 is installed in the rear portion.
5, multistage segmental centrifugal pump according to claim 1, it is characterized in that: when total progression i is even number, the span of i is 4-20, anterior progression is the i/2 level, the progression at rear portion is the i/2 level, with the not level impeller at the described front portion of claim 3, rear portion and the location swap of extrusion section, off-load pipe 4 is installed in the rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114681 CN1439809A (en) | 2002-07-10 | 2002-07-10 | Multistage segmental centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114681 CN1439809A (en) | 2002-07-10 | 2002-07-10 | Multistage segmental centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1439809A true CN1439809A (en) | 2003-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02114681 Pending CN1439809A (en) | 2002-07-10 | 2002-07-10 | Multistage segmental centrifugal pump |
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| CN (1) | CN1439809A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455815C (en) * | 2005-01-30 | 2009-01-28 | 陆雄 | Dynamic regulation method of axial force in multi-stage centrifugal pump with symmetrically configured vane wheel |
| CN106837806A (en) * | 2017-02-10 | 2017-06-13 | 长沙佳能通用泵业有限公司 | A kind of sectional type parallel connection multistage pump |
-
2002
- 2002-07-10 CN CN 02114681 patent/CN1439809A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455815C (en) * | 2005-01-30 | 2009-01-28 | 陆雄 | Dynamic regulation method of axial force in multi-stage centrifugal pump with symmetrically configured vane wheel |
| CN106837806A (en) * | 2017-02-10 | 2017-06-13 | 长沙佳能通用泵业有限公司 | A kind of sectional type parallel connection multistage pump |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |