CN109026660A - A kind of dual-seal circle - Google Patents
A kind of dual-seal circle Download PDFInfo
- Publication number
- CN109026660A CN109026660A CN201810906282.XA CN201810906282A CN109026660A CN 109026660 A CN109026660 A CN 109026660A CN 201810906282 A CN201810906282 A CN 201810906282A CN 109026660 A CN109026660 A CN 109026660A
- Authority
- CN
- China
- Prior art keywords
- ring body
- lip
- seal ring
- seal
- circular arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 60
- 238000005516 engineering process Methods 0.000 abstract description 4
- 210000004907 gland Anatomy 0.000 description 39
- 238000009434 installation Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and pistons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The present invention discloses a kind of dual-seal circle, it is related to plunger pump technical field of sealing technology, including lip seal ring body, circular arc seal ring body and O-ring, lip seal ring body and circular arc seal ring body are coaxially connected, an annular groove is provided on the outer end face of lip seal ring body, O-ring is embedded in annular groove, lip seal ring body positioned at ring slot outside forms external seal lip, lip seal ring body on the inside of annular groove forms interior seal lip, the lateral wall of circular arc seal ring body is set as external arc lug boss, Inner arc recessed portion is provided in the middle part of the inner sidewall of circular arc seal ring body, the lateral wall junction of lip seal ring body and circular arc seal ring body forms outer recessed portion, the inner sidewall junction of lip seal ring body and circular arc seal ring body forms indent concave portion.Dual-seal circle of the invention increases area in sealing contact, and sealing performance is reliable, high pressure resistant, long service life, simple and reasonable, is quickly and expediently installed.
Description
Technical field
The present invention relates to plunger pump technical field of sealing technology, more particularly to a kind of dual-seal circle.
Background technique
Hydraulic end of plunger pump assembly is easily worn part indispensable on fracturing unit truck, and valve box structure is complicated, mainly there is plunger, packing
The composition such as seal assembly, valve valve assembly, gland, pressure cap, gland packing element.Hydraulic end of plunger pump assembly is in the construction process
Failure rate 90% is caused by seal failure.There are two kinds of forms of dynamic sealing and static sealing in fluid end assembly, dynamic is close
Envelope is to seal mutually to do relative motion with matching piece and seal up pressure in the case where external pressure not leak, packing assemblies
Exactly belong to this kind of sealing；It is to seal under stationary state that static sealing, which is sealing element with matching piece, gland sealing be exactly belong to it is quiet
State sealing, static seal plays in fluid end assembly seals up the function that the pressure of each port does not leak.Traditional fluid power
End assembly sealing structure includes clack box, and gland is equipped in clack box, and gland is equipped with pressure cap, and the outside of gland is sealed equipped with gland
Slot, the cooperation of both retaining ring and the sealing of lip formula are set in gland seal groove, are interference fitted when installation, utilize with the sealing hole of clack box
Plunger moves back and forth in clack box generates alternation hyperpressure, and the lip portion that pressure moment seals lip formula is opened, played
Seal pressure maintaining effect.
Nowadays the topography and geomorphology of each elephant, oil reservoirs are deeper and deeper, about in 4000~7000 meters of depths, exploit difficulty and get over
It is more difficult to, exploitation fracturing unit pressure is higher and higher, by original routine 50~80MPa of frac pressure, the pressure base of present pressure break
This is in 80~135MPa；When hydraulic end of plunger pump assembly frac pressure is pressurized to 100MPa or more, due to the sealing of lip formula
The size and magnitude of interference at lip position are less than normal, and the retaining ring of lip formula sealing is supported to have 20 ° of installation notch, gland seal assembly
Moment makes a spurt when by hyperpressure fluid, and leaks along retaining ring joint-cutting, and hydraulic end of plunger pump assembly is caused to be unable to normal supercharging
Operation.Therefore a kind of sealing element high pressure resistant, with long service life is researched and developed, is current urgent problem to be solved.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of dual-seal circle, increases area in sealing contact, sealing performance
Reliably, high pressure resistant, long service life is simple and reasonable, is quickly and expediently installed.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of dual-seal circle, including lip seal ring body, circular arc seal ring body and O-ring, the lip
Mouth seal ring body and the circular arc seal ring body are coaxially connected, and an annular is provided on the outer end face of the lip seal ring body
Slot is embedded with the O-ring in the annular groove, and the lip seal ring body positioned at the ring slot outside forms external seal
Lip, the lip seal ring body on the inside of the annular groove form interior seal lip, the circular arc seal ring body it is outer
Side wall is set as external arc lug boss, and Inner arc recessed portion is provided in the middle part of the inner sidewall of the circular arc seal ring body, described
The lateral wall junction of lip seal ring body and the circular arc seal ring body forms outer recessed portion, the lip seal ring body and institute
The inner sidewall junction for stating circular arc seal ring body forms indent concave portion.
Preferably, the lateral wall of the external seal lip is cambered surface, and the inner sidewall of the interior seal lip is cambered surface.
Preferably, the maximum outside diameter phase of the maximum outside diameter of the lateral wall of the external seal lip and the external arc lug boss
Together.
Preferably, the difference of the minimum outer diameter of the maximum outside diameter of the lateral wall of the external seal lip and the outer recessed portion is
2-4mm。
Preferably, the inner sidewall of the indent concave portion is cambered surface.
Preferably, the external port of the inner sidewall of the circular arc seal ring body is set as chamfering structure.
Preferably, the lip seal ring body and the circular arc seal ring body are an integral structure.
The present invention achieves following technical effect compared with the existing technology:
Dual-seal circle of the invention, including connected lip seal ring body and circular arc seal ring body, outside dual-seal circle
Side includes external seal lip and external arc lug boss and then forms double sealing, and dual-seal circle struts with hand to be inserted in gland close
In sealing groove, the gland for assembling dual-seal circle is placed in the gland sealing hole of clack box, makes the outer seal lip of dual-seal circle
The gland sealing hole of mouth and external arc lug boss and clack box forms double sealing interference fit, has double sealing knot by setting
The dual-seal circle of structure changes sealing means, increases area in sealing contact, so that sealing performance is relatively reliable, substantially increases
Sealing element service life in a high voltage state, increases the service efficiency of sealing element and reduces production cost, structure is simply closed
It manages and is quickly and expediently installed.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that traditional hydraulic end of plunger pump assembly sap cavity gland seals scheme of installation；
Fig. 2 is the cross-sectional view that traditional lip formula seals；
Fig. 3 is the partial enlarged view that traditional lip formula seals；
Fig. 4 is the scale diagrams that traditional lip formula seals；
Fig. 5 is the scheme of installation of dual-seal circle of the present invention；
Fig. 6 is the structural schematic diagram of dual-seal circle of the present invention；
Fig. 7 is the scale diagrams of dual-seal circle of the present invention；
Fig. 8 is the partial enlargement scale diagrams of dual-seal circle of the present invention.
Description of symbols: 1, clack box；2, pressure cap；3, gland；4, retaining ring；5, lip formula seals；6, dual-seal circle；
61, external seal lip；62, interior seal lip；63, O-ring；64, external arc lug boss；65, Inner arc recessed portion；66, outer recessed
Concave portion；67, indent concave portion.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of dual-seal circle, increases area in sealing contact, and sealing performance is reliable, high pressure resistant, uses the longevity
Life length, it is simple and reasonable, it is quickly and expediently installed.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
As shown in figs 6-8, the present embodiment provides a kind of dual-seal circles 6, including lip seal ring body, circular arc seal ring body
With O-ring 63, lip seal ring body and circular arc seal ring body are coaxially connected, and a ring is provided on the outer end face of lip seal ring body
Shape slot is embedded with O-ring 63 in annular groove, and the lip seal ring body positioned at ring slot outside forms external seal lip 61, is located at
Lip seal ring body on the inside of annular groove forms interior seal lip 62, and the lateral wall of circular arc seal ring body is set as external arc protrusion
Portion 64 is provided with Inner arc recessed portion 65, lip seal ring body and circular arc sealing ring in the middle part of the inner sidewall of circular arc seal ring body
The lateral wall junction of body forms outer recessed portion 66, in the inner sidewall junction of lip seal ring body and circular arc seal ring body is formed
Recessed portion 67.
It is cambered surface by the lateral wall of external seal lip 61 in order to enable being not easy to be destroyed and be easily installed when assembly, it is interior close
The inner sidewall for sealing lip 62 is cambered surface, and globoidal structure has guiding role, interior when dual-seal circle 6 is assemblied in gland seal groove
The cambered surface inner sidewall of seal lip 62 plays guiding role, so that dual-seal circle 6 is convenient for assembly, and avoids interior seal lip 62
It is trimmed destruction；External seal lip 61 when the gland 3 for installing dual-seal circle 6 is assemblied in the gland sealing hole of clack box 1
Cambered surface lateral wall plays guiding role, so that gland 3 is convenient for assembly, and external seal lip 61 is avoided to be trimmed destruction.
The maximum outside diameter of the lateral wall of external seal lip 61 is identical as the maximum outside diameter of external arc lug boss 64, by external seal
The difference of the minimum outer diameter of the maximum outside diameter of the lateral wall of lip 61 and outer recessed portion 66 is set as 2-4mm, so that dual-seal circle 6
The magnitude of interference of the gland sealing hole of external seal lip 61 and external arc lug boss 64 and clack box 1 is unilateral 1-2mm, is increased dual close
The magnitude of interference of seal 6, and then lift-off seal performance.In this specific embodiment, the external seal lip 61 of dual-seal circle 6 and outer
The magnitude of interference of the gland sealing hole of circular arc lug boss 64 and clack box 1 is unilateral 1.5mm.
The inner sidewall of indent concave portion 67 is cambered surface, and Inner arc recess is provided in the middle part of the inner sidewall of circular arc seal ring body
Portion 65, it is seen then that setting is there are two cambered surface recessed portion on the inner sidewall of dual-seal circle 6, when to be assemblied in gland close for dual-seal circle 6
When sealing groove, made between the inner sidewall of dual-seal circle 6 and the lateral wall of gland seal groove by the way that two cambered surface recessed portions are arranged
It is mounted so as to even closer secured.
In this specific embodiment, the external port of the inner sidewall of circular arc seal ring body is set as chamfering structure.Lip seal
Ring body and circular arc seal ring body are an integral structure.
As shown in figure 5, being the scheme of installation of dual-seal circle 6, when installation, first the seal groove of gland 3 is cleaned, cleaning
Spot and dirt uniformly smear lubricating grease, then clear up 6 surface blot of dual-seal circle, dirt and uniformly smear lubricating grease, will
Dual-seal circle 6 is strutted with hand to be inserted in gland seal groove, matches 6 internal diameter of dual-seal circle with gland seal groove outer diameter interference
It closes, diameter magnitude of interference is 3mm.It clears up the gland sealing hole surface blot of clack box 1, dirt and uniformly smears lubricating grease, will assemble
The gland 3 of good dual-seal circle 6 is placed in the gland sealing hole of clack box 1, makes the external seal lip 61 and outer circle of dual-seal circle 6
The gland sealing hole of arc lug boss 64 and clack box 1 forms double sealing interference fit, and magnitude of interference is unilateral 1.5mm.Use 3400N
Torque wrench by pressure cap 3 screw in 1 pressure cap hole of clack box in, so that 2 inner plane of pressure cap is pressed 3 medial plane of gland, make its fastening, no
It loosens.
As shown in Figure 1, traditional hydraulic end of plunger pump assembly sealing structure includes clack box 1, gland 3, pressure are equipped in clack box 1
Lid 3 is equipped with pressure cap 2, and the outside of gland 3 is equipped with gland seal groove, and it is close that the cooperation of both retaining ring 4 and lip formula sealing 5 is set to gland
It in sealing groove, is interference fitted with the gland sealing hole of clack box 1 when installation, is moved back and forth in clack box 1 using plunger and generate alternation and surpass
High pressure, pressure moment make lip formula seal 5 lip portions opening, play sealing pressure maintaining effect.
As in Figure 2-4, it is convex to be set as triangle for the lateral wall and inner sidewall at the lip position of traditional lip formula sealing 5
The portion of rising, when installation, are easily trimmed destruction.The lateral wall maximum outside diameter of lip formula sealing 5 and the difference of inner sidewall minimum diameter are 14mm
Left and right, under same use environment, the maximum outside diameter of the lateral wall of the present embodiment China and foreign countries seal lip 61 and interior seal lip 62
The difference of minimum diameter of inner sidewall be 17mm, that is, increase the thickness of lip seal ring body, and then keep its stronger durable.Lip
Mouth formula sealing 5 and the magnitude of interference of the gland sealing hole of clack box 1 are unilateral 0.6mm or so, and magnitude of interference is lower than dual-seal circle 6
Magnitude of interference.As it can be seen that the size and magnitude of interference at the lip position of lip formula sealing 5 are less than normal, and support the retaining ring 4 of lip formula sealing 5
With 20 ° of installation notch, moment makes a spurt when gland seal assembly is by hyperpressure fluid, and leaks along 4 joint-cutting of retaining ring, causes
Hydraulic end of plunger pump assembly is unable to normal supercharging operation.
It follows that having when dual-seal circle 6 assembles in the present embodiment compared with gland seal assembly in the prior art
There is guiding role, be easily installed and be not easy to be trimmed destruction, thickness increase keeps its stronger durable, has two pass by setting
Sealing structure changes sealing means, increases area in sealing contact, so that sealing performance is relatively reliable, substantially increases sealing element
Service life in a high voltage state increases the service efficiency of sealing element and reduces production cost, simple and reasonable and peace
It fills efficient and convenient.
Apply that a specific example illustrates the principle and implementation of the invention in this specification, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (7)
1. a kind of dual-seal circle, which is characterized in that including lip seal ring body, circular arc seal ring body and O-ring, the lip
Seal ring body and the circular arc seal ring body are coaxially connected, are provided with an annular groove on the outer end face of the lip seal ring body,
The O-ring is embedded in the annular groove, the lip seal ring body positioned at the ring slot outside forms outer seal lip
Mouthful, the lip seal ring body on the inside of the annular groove forms interior seal lip, the outside of the circular arc seal ring body
Wall is set as external arc lug boss, and Inner arc recessed portion, the lip are provided in the middle part of the inner sidewall of the circular arc seal ring body
The lateral wall junction of mouthful seal ring body and the circular arc seal ring body forms outer recessed portion, the lip seal ring body and described
The inner sidewall junction of circular arc seal ring body forms indent concave portion.
2. dual-seal circle according to claim 1, which is characterized in that the lateral wall of the external seal lip is cambered surface,
The inner sidewall of the interior seal lip is cambered surface.
3. dual-seal circle according to claim 1, which is characterized in that the maximum of the lateral wall of the external seal lip is outer
Diameter is identical as the maximum outside diameter of the external arc lug boss.
4. dual-seal circle according to claim 3, which is characterized in that the maximum of the lateral wall of the external seal lip is outer
The difference of the minimum outer diameter of diameter and the outer recessed portion is 2-4mm.
5. dual-seal circle according to claim 1, which is characterized in that the inner sidewall of the indent concave portion is cambered surface.
6. dual-seal circle according to claim 1, which is characterized in that the outer end of the inner sidewall of the circular arc seal ring body
Mouth is set as chamfering structure.
7. dual-seal circle according to claim 1, which is characterized in that the lip seal ring body and circular arc sealing
Ring body is an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906282.XA CN109026660A (en) | 2018-08-10 | 2018-08-10 | A kind of dual-seal circle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906282.XA CN109026660A (en) | 2018-08-10 | 2018-08-10 | A kind of dual-seal circle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026660A true CN109026660A (en) | 2018-12-18 |
Family
ID=64633545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810906282.XA Pending CN109026660A (en) | 2018-08-10 | 2018-08-10 | A kind of dual-seal circle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026660A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438213A (en) * | 2013-08-22 | 2013-12-11 | 上海清河机械有限公司 | Sealing piece structure |
| CN206738569U (en) * | 2017-04-27 | 2017-12-12 | 上海唯万密封科技有限公司 | Seal, pressing device and pressure break Five-cylinder piston pump |
| CN208793206U (en) * | 2018-08-10 | 2019-04-26 | 上海清河机械有限公司 | A kind of dual-seal circle |
-
2018
- 2018-08-10 CN CN201810906282.XA patent/CN109026660A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438213A (en) * | 2013-08-22 | 2013-12-11 | 上海清河机械有限公司 | Sealing piece structure |
| CN206738569U (en) * | 2017-04-27 | 2017-12-12 | 上海唯万密封科技有限公司 | Seal, pressing device and pressure break Five-cylinder piston pump |
| CN208793206U (en) * | 2018-08-10 | 2019-04-26 | 上海清河机械有限公司 | A kind of dual-seal circle |
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| CB03 | Change of inventor or designer information |
Inventor after: Lu Yixin Inventor after: Wang He Inventor after: Li Yang Inventor after: Fan Pinhui Inventor after: Zhu Zhengyu Inventor after: Feng Haikun Inventor before: Wang He Inventor before: Li Yang Inventor before: Fan Pinhui Inventor before: Zhu Zhengyu Inventor before: Feng Haikun |
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