CN109296512B - Hydraulic end structure with labyrinth seal in high-pressure reciprocating pump - Google Patents
Hydraulic end structure with labyrinth seal in high-pressure reciprocating pump Download PDFInfo
- Publication number
- CN109296512B CN109296512B CN201811477970.5A CN201811477970A CN109296512B CN 109296512 B CN109296512 B CN 109296512B CN 201811477970 A CN201811477970 A CN 201811477970A CN 109296512 B CN109296512 B CN 109296512B
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- Prior art keywords
- sealing
- sleeve
- plunger
- pressure
- ring
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- 238000007789 sealing Methods 0.000 claims abstract description 131
- 239000002184 metal Substances 0.000 claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000004677 Nylon Substances 0.000 claims description 9
- 229920001778 nylon Polymers 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 230000006872 improvement Effects 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
-
- 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
-
- 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
-
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a hydraulic end structure with labyrinth seal in a high-pressure reciprocating pump, which is characterized in that a metal sealing sleeve is arranged in a plunger and a high-pressure cylinder sleeve, annular sealing grooves are axially arranged at intervals on the inner side of the metal sealing sleeve and form labyrinth seal with the outer side of the plunger, so that the sealing between the plunger and the metal sealing sleeve is realized.
Description
Technical Field
The invention discloses the technical field of high-pressure reciprocating pumps, in particular to a hydraulic end structure with labyrinth seal in a high-pressure reciprocating pump.
Background
The high-pressure reciprocating pump unit consists of a prime motor, a coupling, a driving end, a hydraulic end, a public base and other parts. When the hydraulic end pump valve works specifically, the prime motor drives the crankshaft to rotate through the transmission mechanism, the crankshaft is connected with the connecting rod, the connecting rod is pushed to be connected with the medium rod through the cross head, the medium rod is pushed to drive the plunger to do linear reciprocating motion relative to the high-pressure cylinder sleeve, the purpose of liquid suction and discharge is achieved under the opening and closing action of the hydraulic end pump valve, in order to achieve high-pressure water discharge of the reciprocating pump, pressure relief is avoided, and tightness between the plunger and the high-pressure cylinder sleeve is important.
In the prior art, the plunger seal mainly adopts contact type seal, namely, a filler is placed between a high-pressure cylinder sleeve and a plunger, and the plunger seal is realized by tightly contacting the outer surface of the plunger and the inner surface of the high-pressure cylinder sleeve respectively by means of a compression filler. When the water pressure entering from the high-pressure cylinder sleeve is large, the packing cannot realize effective sealing due to the limitation of strength and rigidity of the packing, and the pressure relief phenomenon occurs, so that the normal operation of the high-pressure reciprocating pump is influenced.
Therefore, how to develop a new sealing form to solve the above-mentioned problems is a urgent problem to be solved.
Disclosure of Invention
In view of the above, the invention discloses a hydraulic end structure with labyrinth seal in a high-pressure reciprocating pump, which at least solves the problems that the existing high-pressure reciprocating pump cannot bear high pressure and pressure relief exists due to the adoption of packing seal.
The technical scheme provided by the invention is that the hydraulic end structure with labyrinth seal in the high-pressure reciprocating pump comprises: the device comprises a plunger 1, a medium rod 2, a corrugated pipe 3, a metal sealing sleeve 4, a high-pressure cylinder sleeve 5 and a low-pressure sealing joint 6;
the upper end of the medium rod 2 is fixedly connected with the lower end of the plunger 1;
The corrugated pipe 3 is fixedly sleeved outside the medium rod 2;
annular sealing grooves 411 are formed in the inner wall of the metal sealing sleeve 4 at intervals along the axial direction, the metal sealing sleeve 4 is sleeved outside the plunger 1, and labyrinth sealing is formed between the metal sealing sleeve and the plunger 1 through the annular sealing grooves 411;
The high-pressure cylinder sleeve 5 is fixedly sleeved outside the metal sealing sleeve 4;
The low-pressure sealing joint 6 is arranged above the intermediate rod 2 and the corrugated pipe 3, sleeved outside the metal sealing sleeve 4 and the plunger 1, and the upper end face of the low-pressure sealing joint 6 is in sealing connection with the lower end face of the high-pressure cylinder sleeve 5.
Further preferably, the metal sealing sleeve 4 comprises: the plunger copper sleeve 41 and the steel sleeve 42, the steel sleeve 42 is fixedly sleeved outside the lower end of the plunger copper sleeve 41.
Further preferably, the outer side surface of the upper end of the metal sealing sleeve 4 is a slope.
Further preferably, the cross section of the annular sealing groove 411 is a right trapezoid, and the inclined waist of the right trapezoid forms an angle of 30 ° with the outer side surface of the plunger 1.
Further preferably, a spiral groove 412 is further provided on the inner wall of the metal sealing sleeve 4, and the spiral groove 412 is located below the annular sealing groove 411.
Still preferably, an annular sealing groove 61 recessed along a radial direction is provided on an inner wall of the low pressure sealing joint 6, a sealing ring guiding copper ring 611, an O-shaped sealing ring 612 and a sealing ring guiding nylon ring 613 are installed in the annular sealing groove 61, the sealing ring guiding copper ring 611, the O-shaped sealing ring 612 and the sealing ring guiding nylon ring 613 are all sleeved outside the plunger 1, and the O-shaped sealing ring 612 is clamped between the sealing ring guiding copper ring 611 and the sealing ring guiding nylon ring 613.
Further preferably, the high-pressure reciprocating pump has a labyrinth seal fluid end structure, and further comprises: the throat hoop 7 is sleeved outside the medium rod 2 and is positioned above the corrugated pipe 3, and the lower end face of the throat hoop 7 is fixedly connected with the upper end face of the corrugated pipe 3.
Further preferably, the upper end of the intermediate rod 2 is fixedly connected with the lower end of the plunger 1 through a snap ring 8.
The hydraulic end structure of the labyrinth seal is characterized in that the metal sealing sleeves are arranged in the plunger and the high-pressure cylinder sleeve, annular sealing grooves are formed in the inner side of the metal sealing sleeves along the axial direction at intervals and form labyrinth seal with the outer side of the plunger, so that sealing between the metal sealing sleeves and the plunger is realized.
The high-pressure reciprocating pump provided by the invention has the hydraulic end structure of labyrinth seal, and has the advantages of simple structure, reasonable design, convenience in use, good sealing performance, good supercharging effect and the like.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic illustration of a fluid end structure with labyrinth seals in a high pressure reciprocating pump according to an embodiment of the present disclosure;
FIG. 2 is an enlarged view of a portion of the area a of FIG. 1;
fig. 3 is a partial enlarged view of the region b in fig. 1.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus consistent with aspects of the invention as detailed in the accompanying claims.
In view of the problems of the prior art that a packing seal is adopted between a plunger and a high-pressure cylinder liner, this embodiment provides a fluid end structure with labyrinth seal in a high-pressure reciprocating pump, referring to fig. 1, the fluid end structure mainly comprises a plunger 1, a medium rod 2, a bellows 3, a metal sealing sleeve 4, a high-pressure cylinder liner 5 and a low-pressure sealing joint 6, wherein the upper end of the medium rod 2 is fixedly connected with the lower end of the plunger 1 through a clamping ring 8, the plunger 1 can reciprocate up and down under the driving of the medium rod 2, the bellows 3 is fixedly sleeved outside the medium rod 2, referring to fig. 1 and 3, an annular sealing groove 411 is arranged on the inner wall of the metal sealing sleeve 4 at intervals along the axial direction, the metal sealing sleeve 4 is sleeved outside the plunger 1, and can form labyrinth seal with the outer side of the plunger 1 through the design of the annular sealing groove 411, the high-pressure cylinder liner 5 is prevented from being fixedly sleeved outside the metal sealing sleeve 4, the low-pressure sealing joint 6 is positioned above the medium rod 2 and the bellows 3, the high-pressure sealing joint 6 is positioned above the medium rod 2 and the bellows 3, the outer end face of the metal sealing sleeve 4 and the lower end face of the high-pressure sealing joint 5 is fixedly sleeved outside the high-pressure sealing joint 5.
When the hydraulic end structure in the embodiment specifically works, the medium rod is connected with the crankshaft in the reciprocating high-pressure pump through the cross head and the connecting rod and driven by the crankshaft, the crankshaft is connected with the speed reducer, the crankshaft is driven by the speed reducer to drive the medium rod to move, and the medium rod drives the plunger to reciprocate to perform linear motion at the same time, so that liquid inlet/liquid discharge of the high-pressure reciprocating pump is realized, and as shown in fig. 1, the annular sealing grooves are axially arranged at intervals on the inner side of the metal sealing sleeve, high-pressure water entering a gap between the metal sealing sleeve and the plunger through the upper part of the high-pressure cylinder sleeve can generate pressure drop after labyrinth sealing, so that potential energy of the high-pressure water is balanced by the labyrinth sealing, and the pressure release is prevented.
The sealing device for the plunger in the hydraulic end structure is a metal sealing sleeve, the sleeve body made of metal materials is firstly proposed in the scheme to serve as the sealing of the plunger, the metal materials have higher strength and hardness compared with the existing filling materials, the impact of high-pressure water can be born, meanwhile, the sealing device is matched with the annular sealing grooves on the inner side of the metal sealing sleeve, when the high-pressure water enters between the plunger and the metal sealing sleeve, the high-pressure water can be gradually throttled by the annular sealing grooves arranged at intervals, so that extremely large pressure drop is formed, and the high-pressure water is prevented from flowing out of the plunger and the metal sealing sleeve rapidly, so that pressure relief is caused.
In fig. 1, specifically, the metal seal sleeve 4 is composed of a plunger copper sleeve 41 and a steel sleeve 42, wherein the steel sleeve 42 is fixedly sleeved outside the lower end of the plunger copper sleeve 41, the plunger copper sleeve 41 and the steel sleeve 42 are fixedly connected together in a hot-pressing mode, the lower end face of the steel sleeve 42 and the lower end face of the plunger copper sleeve 41 are on the same plane, the steel sleeve 42 is arranged outside the lower end of the plunger copper sleeve 41, considering that the elastic modulus of copper alloy is low relative to steel, and when the reciprocating high-pressure pump operates, the plunger copper sleeve is excessively deformed under the extrusion action of the high-pressure cylinder sleeve 5 and the low-pressure seal joint 6, and the plunger 1 is locked to move, so that the steel sleeve with large elastic modulus is fixedly sleeved outside the lower end of the plunger copper sleeve for bearing force.
In order to further improve the sealing performance between the metal sealing sleeve and the plunger, as an improvement of the technical scheme, referring to fig. 1, the outer side surface of the upper end of the metal sealing sleeve 4 is designed to be a slope, after the structural design is adopted, when high-pressure water entering from the high-pressure cylinder sleeve acts on the upper part of the metal sealing sleeve, due to the slope bevel design of the outer side surface of the upper end of the metal sealing sleeve, the pressure acting on the outer side of the metal sealing sleeve is larger than the pressure acting between the metal sealing sleeve and the plunger, so that a pressure difference is formed, the deformation of the upper end of the metal sealing sleeve is increased, the gap between the upper end of the metal sealing sleeve and the plunger is converged, the flow of water is reduced, and the sealing effect is further improved.
As an improvement of the technical scheme, the cross section of the annular sealing groove 411 is a right trapezoid, the included angle between the inclined waist of the right trapezoid and the outer side surface of the plunger 1 is 30 degrees, and the pressure reducing effect is better than that of a rectangular cross section through calculation simulation.
Even if the tightness between the plunger and the metal sealing sleeve is strong, part of water flow still leaks between the plunger and the metal sealing sleeve, in order to facilitate the extraction of low-pressure water, as an improvement of the technical scheme, a spiral groove 412 is further arranged on the inner wall of the metal sealing sleeve 4, the spiral groove 412 is positioned below the annular sealing groove 411 and is extracted by the spiral groove, wherein the design of the spiral groove can ensure that the leakage water at any radial position of the plunger can be extracted through the groove.
As a sealing supplement of the metal sealing sleeve, as an improvement of the technical scheme, an annular sealing groove 61 which is recessed along the radial direction is arranged on the inner wall of the low-pressure sealing joint 6, a sealing ring guiding copper ring 611, an O-shaped sealing ring 612 and a sealing ring guiding nylon ring 613 are arranged in the annular sealing groove 61, the sealing ring guiding copper ring 611, the O-shaped sealing ring 612 and the sealing ring guiding nylon ring 613 are sleeved outside the plunger 1, and the O-shaped sealing ring 612 is clamped between the sealing ring guiding copper ring 611 and the sealing ring guiding nylon ring 613.
In order to realize that the water leaked from the clearance between the plunger and the metal sealing sleeve is isolated from the lubricating oil in the corrugated pipe, so as to prevent the lubricating oil from losing efficacy, as an improvement of the technical scheme, referring to fig. 1, a throat hoop 7 is further designed in the hydraulic end structure, the throat hoop 7 is sleeved outside the medium rod 2 and is positioned above the corrugated pipe 3, and the lower end face of the throat hoop 7 is fixedly connected with the upper end face of the corrugated pipe 3.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (4)
1. A fluid end structure having a labyrinth seal in a high pressure reciprocating pump, comprising: the sealing device comprises a plunger (1), a medium rod (2), a corrugated pipe (3), a metal sealing sleeve (4), a high-pressure cylinder sleeve (5) and a low-pressure sealing joint (6);
The upper end of the medium rod (2) is fixedly connected with the lower end of the plunger (1);
The corrugated pipe (3) is fixedly sleeved outside the medium rod (2);
Annular sealing grooves (411) are formed in the inner wall of the metal sealing sleeve (4) at intervals along the axial direction, the metal sealing sleeve (4) is sleeved outside the plunger (1), and labyrinth sealing is formed between the metal sealing sleeve and the plunger (1) through the annular sealing grooves (411); the cross section of the annular sealing groove (411) is a right trapezoid, and the included angle between the inclined waist of the right trapezoid and the outer side surface of the plunger (1) is 30 degrees;
A spiral groove (412) is further formed in the inner wall of the metal sealing sleeve (4), and the spiral groove (412) is located below the annular sealing groove (411);
the high-pressure cylinder sleeve (5) is fixedly sleeved outside the metal sealing sleeve (4);
The low-pressure sealing joint (6) is arranged above the medium rod (2) and the corrugated pipe (3), sleeved outside the metal sealing sleeve (4) and the plunger (1), and the upper end face of the low-pressure sealing joint (6) is in sealing connection with the lower end face of the high-pressure cylinder sleeve (5);
The metal sealing sleeve (4) comprises: the plunger copper sleeve (41) and the steel sleeve (42), wherein the steel sleeve (42) is fixedly sleeved outside the lower end of the plunger copper sleeve (41);
The low-pressure sealing joint is characterized in that an annular sealing groove (61) recessed along the radial direction is formed in the inner wall of the low-pressure sealing joint (6), a sealing ring guiding copper ring (611), an O-shaped sealing ring (612) and a sealing ring guiding nylon ring (613) are arranged in the annular sealing groove (61), the sealing ring guiding copper ring (611), the O-shaped sealing ring (612) and the sealing ring guiding nylon ring (613) are sleeved outside the plunger (1), and the O-shaped sealing ring (612) is clamped between the sealing ring guiding copper ring (611) and the sealing ring guiding nylon ring (613).
2. A fluid end structure with labyrinth seal in a high pressure reciprocating pump according to claim 1, characterized in that the upper outer side of the metal sealing sleeve (4) is a sloping surface.
3. The fluid end structure with labyrinth seal in a high pressure reciprocating pump as claimed in claim 1, further comprising: the throat hoop (7), throat hoop (7) suit in the outside of mediating pole (2), be located the top of bellows (3), just the lower extreme terminal surface of throat hoop (7) with the upper end terminal surface fixed connection of bellows (3).
4. The fluid end structure with labyrinth seal in the high-pressure reciprocating pump according to claim 1, characterized in that the upper end of the intermediate rod (2) is fixedly connected with the lower end of the plunger (1) through a snap ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477970.5A CN109296512B (en) | 2018-12-05 | 2018-12-05 | Hydraulic end structure with labyrinth seal in high-pressure reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477970.5A CN109296512B (en) | 2018-12-05 | 2018-12-05 | Hydraulic end structure with labyrinth seal in high-pressure reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109296512A CN109296512A (en) | 2019-02-01 |
| CN109296512B true CN109296512B (en) | 2024-07-19 |
Family
ID=65141509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811477970.5A Active CN109296512B (en) | 2018-12-05 | 2018-12-05 | Hydraulic end structure with labyrinth seal in high-pressure reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109296512B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200316U (en) * | 1988-01-21 | 1988-09-21 | 石油部勘探开发研究院机械所 | Plunger type high-pressure high-efficiency well drilling slush pump |
| CN101223390A (en) * | 2005-07-15 | 2008-07-16 | 克赖奥迈科股份有限公司 | Piston rod seal on pumps for cryogenic media |
| CN209278067U (en) * | 2018-12-05 | 2019-08-20 | 河南伯淼水处理有限公司 | With the fluid end structure of labyrinth seal in a kind of high pressure reciprocating pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0842452A (en) * | 1994-08-01 | 1996-02-13 | Sanyo Electric Co Ltd | Multi-stage compressor |
| CN2359494Y (en) * | 1999-01-11 | 2000-01-19 | 中国石化集团管道储运公司襄樊输油公司 | Labyrinth spiral seal device for D-shaped fuel dilivery pump |
| RU78278U1 (en) * | 2007-06-13 | 2008-11-20 | Государственное образовательное учреждение высшего профессионального образования Нижегородский государственный технический университет (ГОУВПО НГТУ) | SCREW LABYRINTH-SCREW PUMP |
| CN101551017A (en) * | 2008-10-22 | 2009-10-07 | 水山机械(嘉兴)有限公司 | Novel labyrinth seal structure for hydraulic element |
| CN201344261Y (en) * | 2008-11-17 | 2009-11-11 | 水山机械(嘉兴)有限公司 | Labyrinth sealing structure with auricle-shaped groove |
| CN201368014Y (en) * | 2009-03-13 | 2009-12-23 | 上海电气压缩机泵业有限公司 | Oil-free lubrication self-sealing box-split sealing structure of high-pressure plunger pump |
| CN202228341U (en) * | 2011-07-07 | 2012-05-23 | 北京工业大学 | Plunger with function of clearance automatic compensation |
| CN202971976U (en) * | 2012-12-04 | 2013-06-05 | 湖北赛文控制阀有限公司 | Double-orientation maze type high pressure difference adjustment control valve |
| CN202991461U (en) * | 2012-12-25 | 2013-06-12 | 上海清河机械有限公司 | Fluid end assembly of plunger pump |
-
2018
- 2018-12-05 CN CN201811477970.5A patent/CN109296512B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200316U (en) * | 1988-01-21 | 1988-09-21 | 石油部勘探开发研究院机械所 | Plunger type high-pressure high-efficiency well drilling slush pump |
| CN101223390A (en) * | 2005-07-15 | 2008-07-16 | 克赖奥迈科股份有限公司 | Piston rod seal on pumps for cryogenic media |
| CN209278067U (en) * | 2018-12-05 | 2019-08-20 | 河南伯淼水处理有限公司 | With the fluid end structure of labyrinth seal in a kind of high pressure reciprocating pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109296512A (en) | 2019-02-01 |
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