CN205533265U - Centrifugal pump is supported at second grade or tertiary radial subdivision both ends - Google Patents
Centrifugal pump is supported at second grade or tertiary radial subdivision both ends Download PDFInfo
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- CN205533265U CN205533265U CN201620322121.2U CN201620322121U CN205533265U CN 205533265 U CN205533265 U CN 205533265U CN 201620322121 U CN201620322121 U CN 201620322121U CN 205533265 U CN205533265 U CN 205533265U
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Abstract
The utility model relates to a centrifugal pump equipment especially relates to one kind and is applicable to transport high temperature, entry high pressure, the low net positive suction head medium of entry. The utility model discloses a centrifugal pump is supported at second grade or tertiary radial subdivision both ends, including the pump body, drive end pump cover, non - drive end pump cover, axle, impeller, drive end bearing parts, non - drive end bearing parts, balance pipe, seal part and transition runner, the impeller includes chopped -off head impeller and 1~2 secondary impeller, and the transition runner lies in between two impellers, and the chopped -off head impeller is for singly inhaling or the double suction structure, and secondary impeller is for singly inhaling the structure, and all weld on the pump body at the both ends of balance pipe. The utility model has the characteristics of stable high efficiency, compact structure, low in cost, dependable performance, installation easy maintenance, long service life etc, be applicable to and carry high temperature, entry high pressure, the low net positive suction head medium of entry.
Description
Technical field
This utility model relates to a kind of centrifugal pumping apparatus, particularly relates to one and is applicable to carry high temperature, inlet high pressure, entrance low net positive suction head medium.
Background technology
Currently used two grades or three grades radially subdivision two ends support centrifugal pump balance pipe apparatus and be one end and be welded on the other end on the pump housing and be welded on pump cover, on in-site installation, dismounting extremely inconvenience and increase leakage point and affect the stability of Site for Unit operation；Additionally, the transition runner between impeller is unfavorable for the uniform diffusion of medium, hydraulic blow can cause unit vibration, affects the stable operation of unit.
Summary of the invention
Two grades or the three grades radial direction subdivision two ends that the purpose of this utility model is to provide the dismounting of a kind of in-site installation convenient, stable, safe and reliable support centrifugal pump.
This utility model is realized by following technical proposals: a kind of two grades or three grades radial direction subdivision two ends support centrifugal pump, including the pump housing, drive end pump cover, anti-drive end pump cover, axle, impeller, drive end bearing parts, non-driven-end bearing parts, balance pipe, seal member and transition runner, described impeller includes first stage impeller and 1～2 secondary impeller, transition runner is between two impellers, first stage impeller is single suction or double suction structure, secondary impeller is single suction structure, and the two ends of balance pipe are all welded on the pump housing.
The exit of described transition runner is provided with the internal liner that back outer surface is curved surface, is welded with liquid separatnig plate at the curved surface of internal liner.
Described transition runner is " Tai Ji type " runner.
This utility model has the feature such as in-site installation convenient disassembly, stable, length in service life, is embodied in:
(1) use " Tai Ji type " area of passage diffusion gradual change form novel transition runner between both stage impellers, reduce transition runner axially and radial dimension, make homogeneous media spread；
(2) balance pipe two ends are all welded on the pump housing, can be disintegrated by pump on the premise of not dismantling balance pipe, and inside metal wound gasket, pressure medium reduces, and reduce outlet side annular seal space pressure, and sealing reliability improves, it is ensured that the stable operation of unit；
(3) using hydraulic blow leading method to reduce vibration, be embodied as transition runner outlet and set up discrete type liquid separatnig plate, decay secondary sucks the mutual shock of waterpower, reduces the unit vibration that waterpower pulse causes.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model；
Fig. 2 is balance pipe schematic diagram of the present utility model；
Fig. 3 is partial enlarged drawing at I in Fig. 1；
Fig. 4 is " Tai Ji type " of the present utility model transition runner schematic diagram；
Fig. 5 is partial enlarged drawing at II in Fig. 1.
Detailed description of the invention
With reference to the accompanying drawings this utility model is described in detail.
Embodiment 1:
The radially subdivision two ends of two grades as shown in Figure 1 support centrifugal pump, including: the pump housing 4, drive end pump cover 2, anti-drive end pump cover 11, axle 14,5, secondary impeller 9 of first stage impeller, drive end bearing parts 1, non-driven-end bearing parts 13, choma 6, drive end lining 3, internal liner 7, anti-drive end lining 10, seal member 12 and securing member.Wherein, first stage impeller 5 is double suction structure, and secondary impeller 9 is single suction structure, and the back outer surface of internal liner 7 is curved surface, is welded with liquid separatnig plate 8 at the curved surface of internal liner 7.
As in figure 2 it is shown, balance pipe 15 both sides are directly welded on the pump housing 4, without dismantling balance pipe when pump disintegrates, it is simple to in-site installation and dismounting.
As it is shown on figure 3, balance pipe 15 is opened on the pump housing 4, makes annular chamber 17 connect with pump intake, reduce pressure medium inside metal wound gasket 16, make pump operation more safe and reliable.
As shown in Figure 4, the transition runner between first stage impeller 5 and secondary impeller 9 is " Tai Ji type " runner, and its cross sectional shape is similar to Tai Ji." Tai Ji type " transition runner decreases axially and radial dimension, change the turning rapidly of transition runner commonly used in the prior art into even transition, medium flows through transition runner by the suction inlet being delivered to secondary impeller 9 of homogeneous media after first stage impeller 5 throws away, it is to avoid the unit vibration caused because waterpower is clashed into.
As it is shown in figure 5, internal liner 7 back outer surface surface blending, medium, after transition runner, is buffered by curved surface, is gradually reduced hydraulic blow, slows down and stablizes flow velocity.Medium is shunted, it is ensured that secondary impeller 9 suction inlet obtains the most stable suction condition to reduce unit vibration by welding liquid separatnig plate 8.
Embodiment 2:
It is essentially identical with structure in embodiment 1 that in the present embodiment two grades radially subdivision two ends support centrifugal pump, and difference is, first stage impeller uses single suction structure.
Embodiment 3:
In the present embodiment three grades radially subdivision two ends support centrifugal pump two secondary impeller, first stage impeller is double suction or single suction structure, two secondary impeller are single suction structure, and the transition runner between first stage impeller and secondary impeller and between the first secondary impeller and second subprime impeller is " Tai Ji type " runner.Other structures are essentially identical with the centrifugal pump structure in embodiment 1.
Claims (3)
1. two grades or three grades radial direction subdivision two ends support centrifugal pump, including the pump housing, drive end pump cover, anti-drive end pump cover, axle, impeller, drive end bearing parts, non-driven-end bearing parts, balance pipe, seal member and transition runner, described impeller includes first stage impeller and 1～2 secondary impeller, transition runner is between two impellers, it is characterized in that: first stage impeller is single suction or double suction structure, secondary impeller is single suction structure, and the two ends of balance pipe are all welded on the pump housing.
Two grades or three grades radial direction subdivision two ends the most according to claim 1 support centrifugal pump, it is characterised in that: the exit of described transition runner is provided with the internal liner that back outer surface is curved surface, is welded with liquid separatnig plate at the curved surface of internal liner.
Two grades or three grades radial direction subdivision two ends the most according to claim 1 and 2 support centrifugal pump, it is characterised in that: described transition runner is " Tai Ji type " runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620322121.2U CN205533265U (en) | 2016-04-18 | 2016-04-18 | Centrifugal pump is supported at second grade or tertiary radial subdivision both ends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620322121.2U CN205533265U (en) | 2016-04-18 | 2016-04-18 | Centrifugal pump is supported at second grade or tertiary radial subdivision both ends |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205533265U true CN205533265U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620322121.2U Active CN205533265U (en) | 2016-04-18 | 2016-04-18 | Centrifugal pump is supported at second grade or tertiary radial subdivision both ends |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205533265U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542669A (en) * | 2017-10-20 | 2018-01-05 | 项达章 | A kind of single-stage double-suction radial direction subdivision centrifugal pump |
| CN111237196A (en) * | 2020-01-02 | 2020-06-05 | 浙江理工大学 | Novel two-end supporting low-vibration efficient double-suction rotary shell pump |
-
2016
- 2016-04-18 CN CN201620322121.2U patent/CN205533265U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542669A (en) * | 2017-10-20 | 2018-01-05 | 项达章 | A kind of single-stage double-suction radial direction subdivision centrifugal pump |
| CN111237196A (en) * | 2020-01-02 | 2020-06-05 | 浙江理工大学 | Novel two-end supporting low-vibration efficient double-suction rotary shell pump |
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