CN206377014U - A kind of highly pressurised liquid plunger pair based on gas barrier - Google Patents
A kind of highly pressurised liquid plunger pair based on gas barrier Download PDFInfo
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- CN206377014U CN206377014U CN201621462060.6U CN201621462060U CN206377014U CN 206377014 U CN206377014 U CN 206377014U CN 201621462060 U CN201621462060 U CN 201621462060U CN 206377014 U CN206377014 U CN 206377014U
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- plunger
- cylinder body
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- annular seal
- seal space
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Abstract
The utility model discloses a kind of highly pressurised liquid plunger pair based on gas barrier, including the big plunger that the cylinder body that inside is hollow structure and inside are hollow structure；Big plunger is arranged on cylinder interior, and external wall of upper portion is slidably matched with cylinder body, and first annular seal space is formed between bottom outer wall and inboard wall of cylinder block；Bottom is provided with fluid chamber, fluid chamber and the separate cavities that UNICOM's first annular seal space is provided between big plunger lower surface in cylinder body；Also it is arranged on including bottom between the small plunger that big plunger body is slidably matched with its inwall, big plunger body and small plunger lower surface and forms the second annular seal space；Pass through at least one damping hole UNICOM between second annular seal space and first annular seal space；Huge pillar is connected with spring beyond the Great Wall between side and cylinder body；The utility model prevents impurity engaging friction pair by high pressure air film fluid partitioning medium and sealing ring, improves the plunger pair life-span and liquid medium can be avoided to leak, while avoiding corrosion of the working media to plunger and seal.
Description
Technical field
The utility model is related to a kind of plunger pair, and in particular to a kind of highly pressurised liquid plunger pair based on gas barrier.
Background technology
Water pump is widely used in the industries such as urban water supply, metallurgy, petrochemical industry, electric power, coalification, industry cleaning link and papermaking；Centrifugation
Pump, membrane pump and plunger pump are main water pump forms, and the above two pressure are relatively low, the latter's volume is larger；Solid particle in water
The seal failure of pump is easily lead to sewage etc., its service behaviour and service life is substantially reduced；Centrifugal pump and membrane pump by
The raising of its operating pressure is limited in the reason for structural principle and material, plunger-type structure is the ideal form of high-pressure hydraulic pump；
Plunger secondary sealing is all to use forming seal, typically passes through sealing ring spacer medium；For high-pressure hydraulic pump, the high pressure of itself and
The presence of impurities in water will accelerate the abrasion of sealing ring and plunger, cause plunger pump seal failure, cause leakage；The one of plunger pump
Part wears are unreasonable from what is designed and assemble, and an also most important part comes from sealing ring in addition；Due to metallurgical, electric power
More and be much sewage with the aqueous medium impurity of the industry such as cleaning, the life-span of plunger pair and its seal is relatively low, significantly shadow
The development of the field high-pressure hydraulic pump is rung；Industrial sealing uses contact seal and non-contact mechanical seal mostly；Its
Middle non-contact mechanical seal includes the hydrodynamic seal of circumferential arc groove, thunder row step surface and spiral groove face, also by them
It is referred to as dry gas seals；Dry gas seals are main to be sealed in centrifugal compressor and screw shaft of ship forward end gas, mixed using dynamic and static pressure
Close support concept and the realization sealing of pressure air film is provided；Air film, and can not be in liquid capacity cavity volume change procedure than relatively thin
Realize automatic pressure compensation and regulation, it is impossible to the structure for plunger pair suction liquid.
Utility model content
The utility model provides a kind of safe and reliable, long working life highly pressurised liquid plunger pair based on gas barrier.
The technical solution adopted in the utility model is：A kind of highly pressurised liquid plunger pair based on gas barrier, including inside
Cylinder body and inside for hollow structure are the big plunger of hollow structure；Big plunger is arranged on cylinder interior, external wall of upper portion and cylinder body
It is slidably matched, first annular seal space is formed between bottom outer wall and inboard wall of cylinder block；Bottom is provided with fluid chamber in cylinder body, fluid chamber and
The separate cavities of UNICOM's first annular seal space are provided between big plunger lower surface；Also big plunger body and its are arranged on including bottom
The small plunger that inwall is slidably matched, small plunger top is arranged on huge pillar portion beyond the Great Wall；Big plunger bottom is provided with the platform caved inward
Rank；The second annular seal space is formed between plunger body and small plunger lower surface greatly；Pass through between second annular seal space and first annular seal space
At least one damping hole UNICOM；Huge pillar is connected with spring beyond the Great Wall between side and cylinder body.
Further, the small plunger is provided with the first sealing ring with the big plunger place of being slidably matched.
Further, between the big plunger and cylinder body, first annular seal space top is provided with least one second sealing ring.
Further, the small plunger upper end exceeds cylinder body upper surface.
Further, surface is provided with cover plate to the huge pillar beyond the Great Wall.
Further, the cylinder body upper surface is provided with cylinder body cover plate.
Further, the cylinder body top and the bottom contacted with fluid chamber use Split type structure.
The beneficial effects of the utility model are：
（1）The utility model forms one layer of stable high pressure air film by the compression of small plunger, is isolated by high pressure air film
Liquid medium and sealing ring, prevent impurity engaging friction pair, improve the plunger pair life-span and liquid medium can be avoided to leak；
（2）High pressure air film in the utility model can meet the requirement of plunger High Pressure Drain, utilize high pressure air film cavity volume
Rapid expanding make larger, the stable vacuum of its generation, it is ensured that plunger pair smoothly absorbs water；
（3）The utility model is provided with damping hole, true when air film dynamic generation when being conducive to high pressure sealing and imbibition
The holding of reciprocal of duty cycle；
（4）The utility model is by setting spring to realize place during position assurance small plunger compressed gas and expanding gas
In static, reach that gas pressure control is realized after requiring with small plunger common mobile.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
In figure：1- springs, the sealing rings of 2- first, 3- cylinder bodies, the sealing rings of 4- second, 5- damping holes, 6- fluid chambers, 7- every
From chamber, 8- first annular seal spaces, the big plungers of 9-, the annular seal spaces of 10- second, 11- small plungers, 12- cover plates, 13- cylinder body cover plates.
Embodiment
The utility model is described further with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of highly pressurised liquid plunger pair based on gas barrier, including the internal cylinder body 3 for hollow structure
With the internal big plunger 9 for hollow structure；Big plunger 9 is arranged on inside cylinder body 3, and external wall of upper portion is slidably matched with cylinder body 3, bottom
First annular seal space 8 is formed between outer wall and the inwall of cylinder body 3；Bottom is provided with fluid chamber 6 in cylinder body 3, fluid chamber 6 and with big plunger
The separate cavities 7 of UNICOM's first annular seal space 8 are provided between 9 lower surfaces；Also the big inside of plunger 9 and its inwall are arranged on including bottom
The small plunger 11 being slidably matched, the top of small plunger 11 is arranged on outside big plunger 9；The big bottom of plunger 9 is provided with what is caved inward
Step；The second annular seal space 10 is formed between the big inside of plunger 9 and the lower surface of small plunger 11；Second annular seal space 10 and first annular seal space
Pass through at least one UNICOM of damping hole 5 between 8；Spring 1 is connected between the big top of plunger 9 and cylinder body 3.
Further, the small plunger 11 is provided with the first sealing ring 2 with the big place of being slidably matched of plunger 9；First sealing ring 2
Using O-ring seal, for preventing the gas in the second annular seal space 10 from leaking.
Further, between the big plunger 9 and cylinder body 3, the top of first annular seal space 8 is provided with least one second sealing
Circle 4；O-ring seal can be used, for preventing the gas in first annular seal space 8 from leaking.
Further, the upper end of small plunger 11 exceeds the upper surface of cylinder body 3.
Further, the upper surface of big plunger 9 is provided with cover plate 12.
Further, the upper surface of cylinder body 3 is provided with cylinder body cover plate 13.
Further, the top of the cylinder body 1 and the bottom that is contacted with fluid chamber 6 are Split type structure；Contacted with fluid chamber 6
The material of lower cylinders 1 generally select anticorrosion material, it is necessary to meet liquid corrosivity requirement, no required precision；On cylinder body 1
Ordinary metallic material may be selected in the material in portion, and required precision is relatively low.
In use, small plunger 11 connects drive mechanism, moved back and forth along the big inwall of plunger 9；Small plunger 11 is quick downwards to be transported
It is dynamic, the gas formation gases at high pressure in the second annular seal space 10 of compression, gases at high pressure are by four damping holes 5 full of the first sealing
Chamber 8；Gases at high pressure in first annular seal space 8 enter separate cavities 7 by the gap between big plunger 9 and cylinder body 3, due to high pressure gas
A floor height is formed in the entrance of body, separate cavities 7 to calm the anger film；High pressure air film can discharge the water in fluid chamber 6, complete high pressure
Water, while the big plunger 9 of isolation and water can be played a part of；Small plunger 11 after draining is completed overhanging, when small plunger 11 and huge pillar
When the cover plate 12 for filling in 9 upper ends is contacted, big plunger 9 and small plunger 11 are simultaneously and rapidly overhanging, and compression spring 1, one end of spring 1 is fixed on
On cover plate 12, the other end is fixed on cylinder body cover plate 13, with synchronous overhanging, the body of separate cavities 7 of the small plunger 11 with big plunger 9
Product increases sharply；Due to the presence in gap between damping hole 5, big plunger 9 and cylinder body 3, the annular seal space of first annular seal space 8 and second
Gas in 10 fails to form vacuum in timely compensation, separate cavities 7, plunger pair can be made smoothly to absorb water.
Small plunger 11 is used to compress and expanding gas, when high_voltage isolation sealing air film is provided during for draining and ensureing imbibition
Prevent separation gas filled vacuum region；Small plunger 11 connects drive mechanism, can be moved back and forth along the big inwall of plunger 9；Huge pillar
Fill in 9 bottoms and be provided with the step caved inward, it is possible to achieve it is spacing that small plunger 11 is moved so that small plunger 11 is in gas compression
The big remains stationary of plunger 9 during with the expansion stage；When small plunger 11 is moved at the big lower step of plunger 9, big plunger 9 is driven
Liquid discharge opeing in compressed liquid chamber 6, when moving at the cover plate 12 of the big plunger 9 in top, drives big plunger 9 to move upwards, real
Existing imbibition；By at least one UNICOM of damping hole 5 between second annular seal space 10 and first annular seal space 8, damping hole 5 is arranged on
On big plunger 9, vacuum when air film dynamic generation during high pressure sealing and imbibition is conducive to keep；Big plunger 9 utilizes spring 1
Positioning is realized with the step of its underpart, it is ensured that in static during the compressed gas of small plunger 11 and expanding gas.
The utility model is the sealing Current Situation for fluid plunger pump friction pairs such as water pumps, and the one kind proposed is used for
Plunger pump based on the sealed plunger pair of gas barrier；One layer of stable high pressure air film is formed in the plunger pair course of work, is led to
Excess pressure air film separates liquid medium and sealing ring, prevents impurity or corrosive liquids engaging friction pair, is improving the plunger pair longevity
Liquid medium is avoided to leak while life；The utility model can reduce material requirements and the requirement on machining accuracy of plunger pair, make
Obtain plunger pair and be easier dismounting and change, reduce maintenance difficulties；The utility model realizes that gas barrier is close by the design of structure
Envelope, according to the property and thermodynamical equilibrium equation of gas, gas has good compression and expansion characteristics, and pressure exists quantitative with volume
Relation；It ensure that and be not filled with the true of liquid medium when compression stage produces the air film for meeting operating pressure requirement and expansion
Dead zone；Small plunger 11 is up moved from bottom, the gas expansion in separate cavities 6, and pressure is down to atm higher, and small plunger 11 is arrived
Up to after the position of cover plate 12 of big plunger 9, the common motion upwards of big plunger 9 is driven, vacuum is formed above liquid；It is small due to damping
The effect in hole 5 and the less reason of gas density prevent gas from the vacuum area above timely liquid filling body, so that real
Existing imbibition process；When small plunger 11 is moved downward, 6 form high pressure sealing air film in separate cavities, realize discharge opeing process；In suction
In liquid process, remain that gas is blocked between sealing ring and liquid working medium, while realizing plunger pair just
Normal liquid sucking-discharging；The utility model is based on gas barrier thought, it is proposed that obstruct working media and friction pair using pressure air
Directly contact, it is to avoid impurity, which is entered in plunger auxiliary air gap, occurs plunger clamping abrasion, while avoid working media to plunger
With the corrosion of seal, the working life of product is substantially increased.
Claims (7)
1. a kind of highly pressurised liquid plunger pair based on gas barrier, it is characterised in that：Including the internal cylinder body (3) for hollow structure
With the internal big plunger (9) for hollow structure；Big plunger (9) is arranged on cylinder body (3) inside, and external wall of upper portion is slided with cylinder body (3)
Coordinate, first annular seal space (8) is formed between bottom outer wall and cylinder body (3) inwall；Cylinder body (3) interior bottom is provided with fluid chamber (6),
Fluid chamber (6) and the separate cavities (7) that UNICOM's first annular seal space (8) are provided between big plunger (9) lower surface；Also include bottom
The internal small plunger (11) being slidably matched with its inwall of big plunger (9) is arranged on, small plunger (11) top is arranged on big plunger (9)
It is outside；Big plunger (9) bottom is provided with the step caved inward；The big internal shape between small plunger (11) lower surface of plunger (9)
Into the second annular seal space (10)；Joined between second annular seal space (10) and first annular seal space (8) by least one damping hole (5)
It is logical；Above big plunger (9) spring (1) is connected between cylinder body (3).
2. a kind of highly pressurised liquid plunger pair based on gas barrier according to claim 1, it is characterised in that：The pillar
Plug (11) is provided with the first sealing ring (2) with big plunger (9) place of being slidably matched.
3. a kind of highly pressurised liquid plunger pair based on gas barrier according to claim 1, it is characterised in that：The huge pillar
Fill between (9) and cylinder body (3), first annular seal space (8) top is provided with least one second sealing ring (4).
4. a kind of highly pressurised liquid plunger pair based on gas barrier according to claim 1, it is characterised in that：The pillar
Fill in (11) upper end and exceed cylinder body (3) upper surface.
5. a kind of highly pressurised liquid plunger pair based on gas barrier according to claim 1, it is characterised in that：The huge pillar
Plug (9) upper surface is provided with cover plate (12).
6. a kind of highly pressurised liquid plunger pair based on gas barrier according to claim 1, it is characterised in that：The cylinder body
(3) upper surface is provided with cylinder body cover plate (13).
7. a kind of highly pressurised liquid plunger pair based on gas barrier according to claim 1, it is characterised in that：The cylinder body
(1) top and the bottom contacted with fluid chamber (6) are Split type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621462060.6U CN206377014U (en) | 2016-12-29 | 2016-12-29 | A kind of highly pressurised liquid plunger pair based on gas barrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621462060.6U CN206377014U (en) | 2016-12-29 | 2016-12-29 | A kind of highly pressurised liquid plunger pair based on gas barrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206377014U true CN206377014U (en) | 2017-08-04 |
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ID=59408244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621462060.6U Withdrawn - After Issue CN206377014U (en) | 2016-12-29 | 2016-12-29 | A kind of highly pressurised liquid plunger pair based on gas barrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206377014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762600A (en) * | 2016-12-29 | 2017-05-31 | 西南交通大学 | A kind of highly pressurised liquid plunger pair based on gas barrier |
-
2016
- 2016-12-29 CN CN201621462060.6U patent/CN206377014U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762600A (en) * | 2016-12-29 | 2017-05-31 | 西南交通大学 | A kind of highly pressurised liquid plunger pair based on gas barrier |
| CN106762600B (en) * | 2016-12-29 | 2018-07-31 | 西南交通大学 | A kind of highly pressurised liquid plunger pair based on gas barrier |
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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 |
Granted publication date: 20170804 Effective date of abandoning: 20180731 |