CN206582166U - Novel sealing ring applied to single-stage double-suction centrifugal pump - Google Patents
Novel sealing ring applied to single-stage double-suction centrifugal pump Download PDFInfo
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- CN206582166U CN206582166U CN201720186273.9U CN201720186273U CN206582166U CN 206582166 U CN206582166 U CN 206582166U CN 201720186273 U CN201720186273 U CN 201720186273U CN 206582166 U CN206582166 U CN 206582166U
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- wedge
- stationary plane
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Abstract
The utility model discloses a kind of novel sealing ring applied to single-stage double-suction centrifugal pump, including upper stationary plane, locating slot, first straight sealing surface, first water guide arc surface, first wedge sealing surface, lower stationary plane, positioning bar, second water guide circular arc, second wedge sealing surface, second straight sealing surface, seal ring body, upper stationary plane is located at the upper and lower ends of sealing ring body with lower stationary plane respectively, locating slot is located on upper stationary plane, first straight sealing surface is located between locating slot and the first wedge sealing surface, first water guide arc surface is located at the side-lower of the first wedge sealing surface, positioning bar is located on lower stationary plane, second straight sealing surface is located between lower stationary plane and the second wedge sealing surface, second water guide circular arc is located above the side of the second wedge sealing surface.The utility model can improve the efficiency of double entry pump, reach energy-efficient purpose.
Description
Technical field
The utility model is related to a kind of sealing ring, more particularly to a kind of novel seal applied to single-stage double-suction centrifugal pump
Ring.
Background technology
For general double suction pump seal rings design, to meet molten error without influenceing pump assembling, or in order to add
Work is convenient, impeller port ring and sealing ring is all processed as into flat type, gap is generally 0.25 ~ 0.5mm；And sealing ring is to prevent
The device that liquid stream flows from pump high pressure chest to low pressure chamber, in the design should reach sealing property most preferably preferably this is required
The leakage rate of sealing ring is reduced, show that reduction leakage rate is most directly that to reduce mating surface gap, increase sealing surface long from theory
Degree, increased ebb interval and damps these three measures；Due to reducing sealing surface gap pump rotor can be made to occur mechanical friction, increase is set
Standby fault rate, so as to be empirically 0.25 ~ 0.5mm, small inadvisable from reliability consideration；Increase sealing surface length, just
Accordingly to increase pump shaft axial length, can so increase the amount of deflection of axle, also increase the installing space of pump, from economic considerations can not
Take；Amount of leakage can be reduced for theory preferably by increasing ebb interval damping, but often room for promotion is limited.Seal simultaneously
Low pressure chamber corresponding to ring is impeller inlet, and the highly pressurised liquid and impeller inlet for flowing through sealing surface carry out flowing liquid collision, to liquid stream
Flowing produces interference, contributes to whirlpool to be formed, is unfavorable for fluid flow in impeller, can accordingly cause hydraulic efficiency to reduce, this two
Person has considerable influence for the efficiency of pump, also more difficult to change.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of novel seal applied to single-stage double-suction centrifugal pump
Ring, it can improve the efficiency of double entry pump, reach energy-efficient purpose.
To solve the technical problem, the utility model provides a kind of novel seal applied to single-stage double-suction centrifugal pump
Ring, it is characterised in that the novel sealing ring applied to single-stage double-suction centrifugal pump includes upper stationary plane, locating slot, first straight
Sealing surface, the first water guide arc surface, the first wedge sealing surface, lower stationary plane, positioning bar, the second water guide circular arc, the second wedge are close
Front cover, the second straight sealing surface, sealing ring body, upper stationary plane are located at the upper and lower ends of sealing ring body with lower stationary plane respectively,
Locating slot is located on upper stationary plane, and the first straight sealing surface is located between locating slot and the first wedge sealing surface, the first water guide circular arc
Face be located at the first wedge sealing surface side-lower, positioning bar be located at lower stationary plane on, the second straight sealing surface be located at lower stationary plane and
Between second wedge sealing surface, the second water guide circular arc is located above the side of the second wedge sealing surface.
Preferably, the described first straight sealing surface and the first wedge sealing surface collectively form first group of sealing surface, and second is straight close
Front cover and the second wedge sealing surface collectively form second group of sealing surface.
Preferably, the locating slot is cast recess.
Preferably, between the first wedge sealing surface and the first straight sealing surface gap, the second wedge sealing surface and
Gap between two straight sealing surfaces is all 0.25 ~ 0.5mm.
Preferably, fixed face coordinates with a pump cover, and lower stationary plane and a pump housing coordinate, and positioning bar is embedded in
In one pump housing.
Preferably, the pump cover, the novel sealing ring applied to single-stage double-suction centrifugal pump, impeller, the pump housing, a pump
Axle, front shroud, back shroud, a rotor constitute single-stage double-suction centrifugal pump, and pump cover is with being applied to single-stage double-entry centrifugal
The novel sealing ring of pump is connected, and the novel sealing ring applied to single-stage double-suction centrifugal pump is located at the top of leaf, and the pump housing is located at impeller
Outside, front shroud is connected with back shroud, and pump shaft is located between pump cover and back shroud, and rotor is connected with pump cover.
Preferably, the novel sealing ring applied to single-stage double-suction centrifugal pump is connected with a pump cover, applied to single-stage
The novel sealing ring of double suction centrifugal pump is located at the top of an impeller, and a pump housing is located at outside impeller, a front shroud and one
Individual back shroud is connected, and a pump shaft is located between pump cover and back shroud, and a rotor is connected with pump cover.
Preferably, the gap of the wedge sealing surface is 0.25 ~ 0.5mm.
Positive effect of the present utility model is：
First, pump volumetric efficiency can be improved；
2nd, the flow regime of pump lower-capacity point can be improved, the efficiency of lower-capacity point is improved, widen high efficient district scope；
3rd, the import whirlpool situation in whole range of flow can be improved, the efficiency in the whole range of flow of pump is improved；
4th, it is simple to manufacture, install convenient；
5th, to pump original structure without modification, sealing ring need to be only changed, impeller inlet machining inclination angle, application is processed
It is in extensive range.
Brief description of the drawings
Fig. 1 is the structural representation for the novel sealing ring that the utility model is applied to single-stage double-suction centrifugal pump；
Fig. 2 is the use state figure for the novel sealing ring that the utility model is applied to single-stage double-suction centrifugal pump；
Fig. 3 is the mounting structure figure for the novel sealing ring that the utility model is applied to single-stage double-suction centrifugal pump.
Embodiment
Name preferred embodiment, and become apparent from intactly illustrating the utility model with reference to accompanying drawing.
As shown in Figure 1 to Figure 3, the utility model includes upper fixation applied to the novel sealing ring 12 of single-stage double-suction centrifugal pump
Face 1, locating slot 2, the first straight sealing surface 3, the first water guide arc surface 4, the first wedge sealing surface 5, lower stationary plane 6, positioning bar 7,
Second water guide circular arc 8, the second wedge sealing surface 9, the second straight sealing surface 10, sealing ring body 23, upper stationary plane 1 and lower stationary plane
6 are located at the upper and lower ends of sealing ring body 23 respectively, and locating slot 2 is located on upper stationary plane 1, and the first straight sealing surface 3 is located at positioning
Between the wedge sealing surface 5 of groove 2 and first, the first water guide arc surface 4 is located at the side-lower of the first wedge sealing surface 5, positioning bar 7
In on lower stationary plane 6, the second straight sealing surface 10 is located between the lower wedge sealing surface 9 of stationary plane 6 and second, the second water guide circular arc 8
Above the side of the second wedge sealing surface 9.
Locating slot 2 is cast recess, it is to avoid long mating surface.
First water guide arc surface and the second water guide arc surface, which flow into impeller to liquid stream, the effect of guiding left and right, the first straight sealing
Face and the first wedge sealing surface collectively form first group of sealing surface, and the second straight sealing surface and the second wedge sealing surface collectively form
Two groups of sealing surfaces, are engaged with impeller seals face, increase sealing surface length.Because liquid stream is from the first straight sealing surface to the first wedge
Sealing surface need to turn over certain angle, the second straight sealing surface need to turn over certain angle to the second wedge sealing surface, and this will increase close
Front cover damped coefficient, so as to improve the volumetric efficiency of pump.Wedge sealing surface has guide effect to the liquid stream flowed through, advantageously reduces
The vortex of impeller inlet, improves traffic flow state, improves the high efficient district scope of pump.The first wedge sealing surface and first straight
The gap between gap, the second wedge sealing surface and the second straight sealing surface between sealing surface 3 is all 0.25 ~ 0.5mm, so close
Seal effect best.
As shown in Figures 2 and 3, upper stationary plane coordinates with a pump cover 11, and lower stationary plane coordinates with a pump housing 14, positioning
Muscle is embedded in a pump housing, effectively prevents sealing ring from rotating.Pump cover 11, the novel sealing ring applied to single-stage double-suction centrifugal pump
12nd, impeller 13, the pump housing 14, pump shaft 15, front shroud 16, back shroud 17, a rotor 18 constitute single-stage
Double suction centrifugal pump, pump cover 11 is connected with the novel sealing ring 12 applied to single-stage double-suction centrifugal pump, applied to single-stage double-entry centrifugal
The novel sealing ring 12 of pump is located at the top of impeller 13, and the pump housing 14 is located at outside impeller 13, and front shroud 16 is connected with back shroud 17,
Pump shaft 15 is located between pump cover 11 and back shroud 17, and rotor 18 is connected with pump cover 11.
After the utility model single-stage double-suction centrifugal pump is designed, die sinking casting matches somebody with somebody car in processing by impeller inlet inclination angle,
Ensure pump shaft axial movement space, be together lifted on rotor part on the pump housing, fixation pushed down finally by pump cover, not with impeller
Rotate.
Theoretical foundation：Sealing ring leakage calculation formula such as formula（1）:
q=(2πR1b(2gHm)^0.5)/((1+0.5η+λL/(2b))^0.5)……………(1)
Wherein：Q represents sealing ring amount of leakage；π/g represents constant；R1 represents to seal ring diameter；B represents that sealing surface coordinates
Gap；Hm represents gap pressure at two ends drop；η represents fillet coefficient；λ represents frictional resistant coefficient；L represents to seal mating surface
Length.
As seen from the above equation, after the utility model is changed to, L is relative to be increased, and η fillets coefficient also becomes big, remaining parameter constant,
Sealing ring leakage rate is reduced, pump volumetric efficiency increase；When pump discharge is less than design discharge, pump inlet liquid stream is due to by centrifugal force
Effect, majority, which is concentrated at back shroud, to be flowed through, and whirlpool area is formed so at front shroud, as shown in Figure 1.It is new by this practicality
Type can improve impeller inlet flowing whirlpool, reduce backflow, increase pump hydraulic efficiency, improve the efficiency of pump and to widen low discharge efficient
Area.
Although the foregoing describing embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, on the premise of without departing substantially from principle of the present utility model and essence, and these embodiments can be done
Go out various changes or modifications.Therefore, protection domain of the present utility model is defined by the appended claims.
Claims (6)
1. a kind of novel sealing ring applied to single-stage double-suction centrifugal pump, it is characterised in that described to be applied to single-stage double-entry centrifugal
The novel sealing ring of pump include upper stationary plane, locating slot, the first straight sealing surface, the first water guide arc surface, the first wedge sealing surface,
Lower stationary plane, positioning bar, the second water guide circular arc, the second wedge sealing surface, the second straight sealing surface, sealing ring body, upper stationary plane
It is located at the upper and lower ends of sealing ring body respectively with lower stationary plane, locating slot is located on upper stationary plane, and the first straight sealing surface is located at
Between locating slot and the first wedge sealing surface, the first water guide arc surface is located at the side-lower of the first wedge sealing surface, positioning bar position
In on lower stationary plane, the second straight sealing surface is located between lower stationary plane and the second wedge sealing surface, and the second water guide circular arc is located at the
Above the side of two wedge sealing surfaces.
2. the novel sealing ring of single-stage double-suction centrifugal pump is applied to as claimed in claim 1, it is characterised in that described first is straight
Sealing surface and the first wedge sealing surface collectively form first group of sealing surface, the second straight sealing surface and the second common structure of wedge sealing surface
Into second group of sealing surface.
3. the novel sealing ring of single-stage double-suction centrifugal pump is applied to as claimed in claim 1, it is characterised in that the locating slot
For cast recess.
4. the novel sealing ring of single-stage double-suction centrifugal pump is applied to as claimed in claim 1, it is characterised in that first contract
The gap between gap, the second wedge sealing surface and the second straight sealing surface between shape sealing surface and the first straight sealing surface is all
0.25~0.5mm。
5. the novel sealing ring of single-stage double-suction centrifugal pump is applied to as claimed in claim 1, it is characterised in that fixed
Face coordinates with a pump cover, and lower stationary plane and a pump housing coordinate, and positioning bar is embedded in a pump housing.
6. the novel sealing ring of single-stage double-suction centrifugal pump is applied to as claimed in claim 5, it is characterised in that the pump cover,
Novel sealing ring, impeller, the pump housing, pump shaft, front shroud, a bonnet applied to single-stage double-suction centrifugal pump
Plate, a rotor constitute single-stage double-suction centrifugal pump, and pump cover is connected with the novel sealing ring applied to single-stage double-suction centrifugal pump, applies
It is located at the top of leaf in the novel sealing ring of single-stage double-suction centrifugal pump, the pump housing is located at outside impeller, and front shroud is connected with back shroud,
Pump shaft is located between pump cover and back shroud, and rotor is connected with pump cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186273.9U CN206582166U (en) | 2017-02-28 | 2017-02-28 | Novel sealing ring applied to single-stage double-suction centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186273.9U CN206582166U (en) | 2017-02-28 | 2017-02-28 | Novel sealing ring applied to single-stage double-suction centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206582166U true CN206582166U (en) | 2017-10-24 |
Family
ID=60091591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720186273.9U Active CN206582166U (en) | 2017-02-28 | 2017-02-28 | Novel sealing ring applied to single-stage double-suction centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206582166U (en) |
-
2017
- 2017-02-28 CN CN201720186273.9U patent/CN206582166U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200120 room 103, Pujian Road, Pudong New Area, Shanghai, 103 Patentee after: Shanghai Rui Chen environmental protection Polytron Technologies Inc Address before: 200120 room 103, Pujian Road, Pudong New Area, Shanghai, 103 Patentee before: Shanghai Richen Environmental Technology Co., Ltd. |