CN206903925U - A kind of contactless shaft seal structure of high-pressure pump - Google Patents
A kind of contactless shaft seal structure of high-pressure pump Download PDFInfo
- Publication number
- CN206903925U CN206903925U CN201720877954.XU CN201720877954U CN206903925U CN 206903925 U CN206903925 U CN 206903925U CN 201720877954 U CN201720877954 U CN 201720877954U CN 206903925 U CN206903925 U CN 206903925U
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- Prior art keywords
- pressure side
- low
- axle sleeve
- pressure
- side sealing
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a kind of high-pressure pump with contactless shaft seal structure, including the pump housing and main shaft, the main shaft is adapted with the pump housing, the circumferentially arranged collecting chamber for having annular of the mating surface of the pump housing and main shaft, and conduction hole is provided with the pump housing in the collecting chamber；The pump housing of collecting chamber both sides includes high-pressure side seal cartridge and high-pressure side sealing axle sleeve with main shaft seal, high-pressure side sealing pair respectively by high-pressure side sealing pair and low-pressure side sealing pair, and the high-pressure side seal cartridge internal diameter is adapted with high-pressure side sealing axle sleeve external diameter；Low-pressure side sealing pair includes low-pressure side seal cartridge and low-pressure side sealing axle sleeve, and the low-pressure side seal cartridge internal diameter is adapted with low-pressure side sealing axle sleeve external diameter；Partial high pressure side medium flows into collecting chamber after the throttling of high-pressure side sealing pair, and the medium in the collecting chamber flows out collecting chamber through conduction hole.This structure can reduce the leakage rate between main shaft and the pump housing under high pressure differential state, make low-pressure side zero leakage.
Description
Technical field
High-pressure pump shaft seal structure is the utility model is related to, is specifically related to a kind of high-pressure pump with contactless shaft seal structure.
Background technology
Non-contacting sealing structure is commonly used between the pump housing and main shaft of high pressure centrifugal pump at present, in conveying containing a small amount of solid
, can be close using the labyrinth seal in non-contacting sealing structure or helixseal mode, labyrinth between the pump housing and main shaft during medium
Envelope and the mode of helixseal are relatively low to part processing precision and installation requirement, and service life length, usually maintenance load is few, makes
With relatively broad.
During using labyrinth seal, medium high-pressure side can have a small amount of leakage in the both sides in labyrinth with low-pressure side.Using spiral shell
During rotation sealing, by processing helicla flute on axle or axle sleeve, when axle rotates, pumping effect forms pressure difference as caused by helicla flute,
The sealing leak amount of high-pressure side and low-pressure side is determined by the restriction loss between linear loss and adjacent members of the fluid along helicla flute
It is fixed, the effect of No leakage can be produced when its pump discharge exceedes leakage rate, its sealing formation condition is：Helicla flute pump flow
Amount >=sealing leak amount；But when the pressure differential of high-pressure side and low-pressure side is very big, because helicla flute flows for insertion, it is along journey
When loss is insufficiently resistant to amount of leakage caused by High Pressure Difference, sealing will fail.
Utility model content
For deficiencies of the prior art, the purpose of this utility model is to propose a kind of high-pressure pump with contactless
Shaft seal structure, this structure can be reduced in the state of high-pressure side and low-pressure side have under high pressure differential main shaft and the pump housing it
Between leakage rate, make low-pressure side zero leakage.
To achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of contactless shaft seal structure of high-pressure pump, including the pump housing and main shaft, the main shaft are adapted with the pump housing, institute
State the sealing secondary sealing being made up of between the pump housing and main shaft seal cartridge and sealing axle sleeve；The seal cartridge is consolidated with the pump housing
Fixed, the sealing axle sleeve is fixed with main shaft, and the sealing axle sleeve external diameter is adapted with the seal cartridge internal diameter；Its feature exists
In：The mating surface of the pump housing and main shaft is circumferentially arranged a collecting chamber of annular, is provided with the pump housing in the collecting chamber
Conduction hole；The sealing pair includes high-pressure side sealing pair and low-pressure side sealing pair, and the pump housing of the collecting chamber both sides passes through high pressure
Side seal is secondary to include high-pressure side seal cartridge and high pressure with main shaft seal, the high-pressure side sealing pair respectively with low-pressure side sealing pair
Side seal axle sleeve, the low-pressure side sealing pair include low-pressure side seal cartridge and low-pressure side sealing axle sleeve, partial high pressure side medium
Collecting chamber is flowed into after the throttling of high-pressure side sealing pair, and the medium in the collecting chamber flows out collecting chamber through conduction hole.
This high-pressure pump is with contactless shaft seal structure, and after being throttled by high-pressure side sealing pair, only a small amount of medium flows into
Collecting chamber, when the pressure medium in collecting chamber is larger, medium is flow to by conduction hole outside the pump housing or the suction inlet of pump, it is ensured that
Collecting chamber and the pressure difference of low-pressure side in rational scope, make the pumpability of low-pressure side sealing pair be more than sealing leak all the time
Amount, reach the effect of low-pressure side zero leakage；By rationally setting the parameter of high-pressure side sealing pair and the parameter of low-pressure side sealing pair,
Under the cooperation of collecting chamber and conduction hole, reduce and lead in the state of can having in high-pressure side and low-pressure side under high pressure differential
Leakage rate between axle and the pump housing.
Further, it is close using labyrinth between high-pressure side sealing axle sleeve and high-pressure side seal cartridge described in the utility model
Envelope.High-pressure side sealing pair is main sealing pair, the labyrinth seal structure that can be taken various forms, such as through type, dioptric type, ladder
Formula, honeycomb fashion etc..
Further, it is close using spiral between low-pressure side sealing axle sleeve and low-pressure side seal cartridge described in the utility model
Envelope.Helixseal can use the helixseal mode of single line or multi start thread, draw by the decompression of high-pressure side sealing pair and conduction hole
After stream decompression, low-pressure side zero leakage is realized by helicla flute pumping effect.
Further, high-pressure side seal cartridge described in the utility model is structure as a whole with low-pressure side seal cartridge.
Further, high-pressure side seal cartridge described in the utility model and low-pressure side seal cartridge are some sections.
Further, high-pressure side sealing axle sleeve described in the utility model is structure as a whole with low-pressure side sealing axle sleeve.
Further, high-pressure side sealing axle sleeve described in the utility model and low-pressure side sealing axle sleeve are some sections.
Compared with prior art, the beneficial effects of the utility model are mainly reflected in：The contactless shaft seal structure of this high-pressure pump
In, after being throttled by high-pressure side sealing pair, only a small amount of medium flows into collecting chamber, when the pressure medium in collecting chamber is larger
When, medium is flow to by conduction hole outside the pump housing or the suction inlet of pump, it is ensured that collecting chamber and the pressure difference of low-pressure side are all the time reasonable
In the range of, the pumpability of low-pressure side sealing pair is more than sealing leak amount, reach the effect of low-pressure side zero leakage；Pass through conjunction
Reason sets the parameter of high-pressure side sealing pair and the parameter of low-pressure side sealing pair, under the cooperation of collecting chamber and conduction hole, Ke Yi
High-pressure side and low-pressure side reduce the leakage rate between main shaft and the pump housing in the state of having under high pressure differential.
Brief description of the drawings
Fig. 1 is the high-pressure pump of the utility model embodiment with contactless shaft seal structure schematic diagram.
In accompanying drawing, the 1- pump housings；2- main shafts；3- collecting chambers；4- conduction holes；5- high-pressure sides sealing pair；6- low-pressure side sealing pairs；
51- high-pressure sides seal cartridge；52- high-pressure sides sealing axle sleeve；61- low pressure stage seal cartridges；62- low-pressure side seal shafts
Set.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, the contactless shaft seal structure of the high-pressure pump of the present embodiment, including the pump housing 1 and main shaft 2, the main shaft 2
It is adapted with the pump housing 1, the circumferentially arranged collecting chamber 3 for having annular of mating surface of the pump housing 1 and main shaft 2, the collection
Conduction hole 4 is provided with the pump housing 1 in chamber 3；The pump housing 1 of the both sides of collecting chamber 3 passes through high-pressure side sealing pair 5 and low-pressure side sealing pair
6 seal with main shaft 2 respectively, partial high pressure side medium inflow collecting chamber 3 after the throttling of high-pressure side sealing pair 5, in the collecting chamber 3
Medium through conduction hole 4 flow out collecting chamber 3.
As shown in figure 1, high-pressure side sealing pair 5 includes high-pressure side seal cartridge 51 and high-pressure side sealing axle sleeve 52, high-pressure side
Seal cartridge 51 is fixed on the high-pressure side pump housing 1, and high-pressure side sealing axle sleeve 52 is fixed on main shaft 2, high-pressure side sealing axle sleeve 52
External diameter is adapted with the internal diameter of high-pressure side seal cartridge 51.In the present embodiment, high-pressure side sealing pair 5 is main sealing pair, and high-pressure side is close
The mode of the labyrinth seal taken various forms between envelope axle sleeve 52 and high-pressure side seal cartridge 51, such as through type, dioptric type, rank
Ladder type, honeycomb fashion etc..Specifically, can also be substituted in practical application with other sealing means, as long as meeting requirement.
As shown in figure 1, low-pressure side sealing pair 6 includes low-pressure side seal cartridge 61 and low-pressure side sealing axle sleeve 62, low-pressure side
Seal cartridge 61 is fixed on the low-pressure side pump housing 1, and low-pressure side sealing axle sleeve 62 is fixed on main shaft 2, low-pressure side sealing axle sleeve 62
External diameter is adapted with low-pressure side seal cartridge 61.In the present embodiment, low-pressure side sealing axle sleeve 62 and high-pressure side seal cartridge 61 it
Between by the way of helixseal, on low-pressure side sealing axle sleeve 62 with set helicla flute.Helixseal can use single line or more
The helixseal mode of line screw thread, after the decompression of high-pressure side sealing pair 5 and the decompression drainage of conduction hole 4, pumped and imitated by helicla flute
Low-pressure side zero leakage should be realized.Specifically, can also be substituted in practical application with other sealing means, labyrinth seal groove or spiral
Groove can be opened up only on axle sleeve or bushing, can also be opened up simultaneously on axle sleeve or bushing, as long as meeting requirement.
As shown in figure 1, this high-pressure pump passes through high-pressure side sealing pair 5 with contactless shaft seal structure（Labyrinth seal）Throttling
Afterwards, only a small amount of medium flows into collecting chamber 3, and when in collecting chamber 3 pressure is larger, medium flow to the pump housing 1 by conduction hole 4
Outer or pump suction inlet, this structure will ensure that the pressure difference of collecting chamber 3 and low-pressure side in rational scope, makes low-pressure side all the time
Sealing pair 6（Helixseal）Pumpability be more than sealing leak amount, reach the effect of low-pressure side zero leakage.By rationally setting
High-pressure side sealing pair 5（Labyrinth seal）Parameter and low-pressure side sealing pair 6（Helixseal）Parameter, collecting chamber 3 with drainage
Under the cooperation in hole 4, this structure uses in the state of can having in high-pressure side and low-pressure side under high pressure differential and reduces master
Leakage rate between axle 2 and the pump housing 1（When using the sealing means of labyrinth structure merely, in the state of pressure ratio is constant, increase is close
When sealing segment length leakage rate change is little, this structural change pressure ratio of labyrinth structure high-pressure side and low-pressure side, improves labyrinth
Sealing effectiveness）.
As shown in figure 1, in the present embodiment, high-pressure side seal cartridge 51 is divided into two sections of settings with low-pressure side seal cartridge 61,
High-pressure side sealing axle sleeve 52 is divided into two sections of settings, high-pressure side seal cartridge 51 and high-pressure side seal shaft with low-pressure side sealing axle sleeve 62
52 correspondences are covered, low-pressure side seal cartridge 61 is corresponding with low-pressure side sealing axle sleeve 62.In practical operation, high-pressure side seal cartridge 51,
Low-pressure side seal cartridge 61, high-pressure side sealing axle sleeve 52 and low-pressure side sealing axle sleeve 62 can be arranged to multistage；High-pressure side is close
Envelope bushing 51 can set into a single integrated structure, high-pressure side sealing axle sleeve 52 and low-pressure side sealing axle sleeve with low-pressure side seal cartridge 61
62 can also set it is into a single integrated structure, but to ensure high-pressure side medium through high-pressure side sealing pair 5 decompression after can flow into collecting chamber 3 and
Do not influence to install and use.
It is last it should be noted that above example is only unrestricted to illustrate the technical solution of the utility model, to the greatest extent
The utility model is described in detail with reference to preferred embodiment by pipe applicant, and one of ordinary skill in the art should manage
Solution, modifies or equivalent substitution to the technical solution of the utility model, without departing from the objective and scope of the technical program,
It all should cover among right of the present utility model.
Claims (7)
1. a kind of contactless shaft seal structure of high-pressure pump, including the pump housing and main shaft, the main shaft is adapted with the pump housing, described
The sealing secondary sealing being made up of between the pump housing and main shaft seal cartridge and sealing axle sleeve；The seal cartridge is fixed with the pump housing,
The sealing axle sleeve is fixed with main shaft, and the sealing axle sleeve external diameter is adapted with the seal cartridge internal diameter；It is characterized in that：Institute
State the circumferentially arranged collecting chamber for having annular of mating surface of the pump housing and main shaft, drainage is provided with the pump housing in the collecting chamber
Hole；The sealing pair includes high-pressure side sealing pair and low-pressure side sealing pair, and the pump housing of the collecting chamber both sides is close by high-pressure side
Envelope is secondary close including high-pressure side seal cartridge and high-pressure side with main shaft seal, the high-pressure side sealing pair respectively with low-pressure side sealing pair
Axle sleeve is sealed, the low-pressure side sealing pair includes low-pressure side seal cartridge and low-pressure side sealing axle sleeve, and partial high pressure side medium is through height
Collecting chamber is flowed into after pressure side seal chromaffin body stream, and the medium in the collecting chamber flows out collecting chamber through conduction hole.
2. the contactless shaft seal structure of high-pressure pump according to claim 1, it is characterised in that：The high-pressure side sealing axle sleeve
Labyrinth seal is used between the seal cartridge of high-pressure side.
3. the contactless shaft seal structure of high-pressure pump according to claim 1 or 2, it is characterised in that：The low pressure side seal
Helixseal is used between axle sleeve and low-pressure side seal cartridge.
4. the contactless shaft seal structure of high-pressure pump according to claim 1, it is characterised in that：The high-pressure side seal cartridge
It is structure as a whole with low-pressure side seal cartridge.
5. the contactless shaft seal structure of high-pressure pump according to claim 1, it is characterised in that：The high-pressure side seal cartridge
It it is some sections with low-pressure side seal cartridge.
6. the contactless shaft seal structure of high-pressure pump according to claim 1, it is characterised in that：The high-pressure side sealing axle sleeve
It is structure as a whole with low-pressure side sealing axle sleeve.
7. the contactless shaft seal structure of high-pressure pump according to claim 1, it is characterised in that：The high-pressure side sealing axle sleeve
It it is some sections with low-pressure side sealing axle sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720877954.XU CN206903925U (en) | 2017-07-19 | 2017-07-19 | A kind of contactless shaft seal structure of high-pressure pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720877954.XU CN206903925U (en) | 2017-07-19 | 2017-07-19 | A kind of contactless shaft seal structure of high-pressure pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206903925U true CN206903925U (en) | 2018-01-19 |
Family
ID=61313228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720877954.XU Withdrawn - After Issue CN206903925U (en) | 2017-07-19 | 2017-07-19 | A kind of contactless shaft seal structure of high-pressure pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206903925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143517A (en) * | 2017-07-19 | 2017-09-08 | 重庆水泵厂有限责任公司 | The contactless shaft seal structure of high-pressure pump |
-
2017
- 2017-07-19 CN CN201720877954.XU patent/CN206903925U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143517A (en) * | 2017-07-19 | 2017-09-08 | 重庆水泵厂有限责任公司 | The contactless shaft seal structure of high-pressure pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180119 Effective date of abandoning: 20230414 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180119 Effective date of abandoning: 20230414 |