CN106499824A - A kind of reciprocating magnetic liquid self-circulation lubricating sealing device - Google Patents
A kind of reciprocating magnetic liquid self-circulation lubricating sealing device Download PDFInfo
- Publication number
- CN106499824A CN106499824A CN201710012909.2A CN201710012909A CN106499824A CN 106499824 A CN106499824 A CN 106499824A CN 201710012909 A CN201710012909 A CN 201710012909A CN 106499824 A CN106499824 A CN 106499824A
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- piston
- cylinder
- pistons end
- ring
- annular magnet
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- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910003145 α-Fe2O3 Inorganic materials 0.000 description 2
- 101100118236 Candida albicans (strain SC5314 / ATCC MYA-2876) EFH1 gene Proteins 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention relates to a kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including annular magnet, piston and cylinder etc., it is spindle, middle part and end junction formation angle α in the middle part of piston, middle part is provided with annular groove, is provided with O-ring seals and piston ring in annular groove；Annular magnet is placed on the outside of cylinder, positioned at the midpoint of piston back-and-forth movement.Present configuration is compact, can meet the working condition of high-voltage high-speed, can effectively reduce and prevent the leakage and loss of lubricant, improves service life and the sealing effectiveness of piston ring；And to piston movement direction without particular/special requirement.
Description
Technical field
The invention belongs to reciprocating mechanical field, and in particular to a kind of reciprocating magnetic liquid self-circulation lubricating sealing
Device, can be used for the reciprocating machines such as internal combustion engine, air conditioning system, heavy-duty machinery bearing.
Background technology
The soliquid that magnetic liquid is made up of nano magnetic particle, base load liquid and three part of surfactant, be
Have the functional fluid of magnetic and mobility concurrently.Due to the peculiar property of magnetic liquid, magnetic liquid is widely used as in sealing
Agent and lubricant, these application major parts are to achieve static sealing or rotatory sealing by magnetic liquid, are such as applied to true
Empty sealing and rotation motor etc.；It is less that magnetic liquid is applied to reciprocating frame for movement, and most of magnetic fluid sealing
Structure can not realize that the self-loopa of magnetic liquid is utilized.
The reciprocating machine of different structure and size is widely used in industry and domestic appliance, and typical example has：Interior
Reciprocal bearing in combustion engine, air conditioning system and heavy-duty machinery.Traditional reciprocating machine is reached to pumping chamber by piston ring
Sealing effectiveness is arrived, and adds oils and fatss series lubricant agent.For continuous back and forth movement machinery, during the back and forth movement of piston, lubrication
Agent or sealant can be thrown off the zone of action under inertia force effect；If not supplementing in time, bleeding of lubricant may make device
Break down and security threat is brought to staff.There is provided enough lubricants to ensure between reciprocating shaft and its surrounding structure
Do not lose lubrication and be always the technological difficulties that reciprocating machine faces.
Content of the invention
In order to overcome the shortcoming of prior art, the present invention to provide one kind and can effectively reduce and prevent lubricant from being lost in and leak
Reciprocating magnetic liquid self-circulation lubricating sealing device.
The technical solution used in the present invention is as follows：
A kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including piston shaft 1, magnetic liquid lubrication agent 3, annular magnet
5th, piston 8 and cylinder 9；
Piston 8 includes 8a in the middle part of piston, II 8c of I 8b of pistons end and pistons end；In the middle part of piston, 8a is spindle, and interlude is straight
Footpath is maximum and cylindrical, and interlude accounts for the ratio of 8a overall lengths in the middle part of piston more than 25%, less than 100%, the 8a two toward in the middle part of piston
End diameter is gradually reduced；In the middle part of piston, 8a two ends are connected with I 8b of pistons end and II 8c of pistons end respectively, and junction forms angle
90 ° of α, α ＜；I 8b of pistons end is connected with piston shaft 1；
Piston 8 is placed in inside cylinder 9, is provided with least one annular groove 4, is provided with O shapes in annular groove 4 in the middle part of piston in the middle part of 8a
Sealing ring 7,7 overcoat ring plugging 6 of O-ring seals, piston ring 6 are contacted with 9 inwall of cylinder, and magnetic liquid lubrication agent 3 is being lived
Lubricant liquid film is formed between 9 inwall of plug ring 6 and cylinder；Gap 2 is formed in the middle part of piston between 9 inwall of 8a two ends and cylinder；Piston
I 8b of end and II 8c of pistons end is smaller than 0.143mm with 9 inwall of cylinder；
Annular magnet 5 is placed on the outside of cylinder 9 and is combined closely with its outer surface, and annular magnet 5 is located in 8 back and forth movement of piston
Point, piston 8 remain that in motor process I 8b of pistons end and II 8c of pistons end are respectively at the corresponding position of annular magnet 5
The both sides that puts；Radially, magnetic blow out centre regional magnetic field intensity is more than 1.5kA/m to the magnetizing direction of annular magnet 5.
The quantity of annular magnet 5 is more than one；Annular magnet 5 is permanent magnet, can be a complete entirety, also may be used
To be made up of polylith Magnet.
Operation principle of the present invention：
Below so that piston moves horizontally in cylinder as an example, its operation principle is illustrated, but in actual applications, to work
The plug direction of motion can be used for level, vertical or other any directions without particular/special requirement.
Under the magneticaction that annular magnet 5 is produced, magnetic liquid lubrication agent 3 can be adsorbed to the corresponding position of annular magnet 5
On 9 inwall of cylinder that puts；Piston 8 is moved reciprocatingly under the drive of piston shaft 1 in cylinder 9, and piston ring 6 is produced with 9 inwall of cylinder
Raw mutually slip, magnetic liquid lubrication agent 3 form lubricant liquid film between 9 inwall of piston ring 6 and cylinder（Also serve as simultaneously close
Envelope agent）.
When piston 8 is turned right from high order end to be accelerated, a small amount of magnetic liquid lubrication agent 3 can be stagnant under inertia force effect
After the motion of piston 8, the gap on the left of piston ring 6 is flowed to, remaining magnetic liquid lubrication agent 3 continues in piston ring 6 and cylinder 9
Lubricating liquid film is formed between inwall, lubrication is played；When piston ring 6, behind midpoint, piston 8 will do to the right retarded motion, used
Property power effect under a small amount of magnetic liquid lubrication agent 3 can flow to 6 right side gap of piston ring；As shown in Fig. 2 now as piston 8 connects
Terminal on the right side of nearly stroke, annular magnet 5 are located above the gap on the left of piston ring 6, and now, piston 8 is accelerated from left to right
When be thrown off the magnetic liquid lubrication agent 3 of piston ring 6 and will be adsorbed to the gas with 5 corresponding position of annular magnet under magneticaction
On 9 inwall of cylinder；
Piston 8 starts to turn left from the right side after moving to right side terminal to do and first accelerates the return that slows down afterwards to move, when piston ring 6 is through ring
During shape 5 underface of Magnet, can scrape and take away the magnetic liquid lubrication agent 3 for being adsorbed in 5 corresponding position of annular magnet, continuously form lubrication thin
Film.As shown in figure 3, piston movement is to the terminal of left side, annular magnet 5 is located above the gap on the right side of piston ring 6, got rid of to
Magnetic liquid lubrication agent 3 herein is adsorbed on 9 inwall of cylinder of 5 corresponding position of annular magnet under magneticaction, treats piston 8
When moving across again, the magnetic liquid lubrication agent 3 that is adsorbed in herein will be scraped by piston ring 6 and be taken away, and continuously form lubricating liquid film.
As described above, can achieve the self-loopa of lubricant, the leakage and loss of lubricant is effectively reduced and prevents.
In the middle part of piston, 8a can be limited in magnetic liquid lubrication agent 3 in gap 2 using spindle-type α-Fe2O3, I 8b of pistons end
Minimum with the gap of 9 inwall of cylinder with II 8c of pistons end, can effectively prevent the leakage of lubricant；8 center of piston is provided with ring
Connected in star 4 is conducive to for magnetic liquid lubrication agent 3 being limited in piston ring 6 and nearby reaches sealing effectiveness.
Beneficial effects of the present invention：
1st, the present invention applies magnetic field by annular magnet, it is achieved that lubricant in reciprocating machine using magnetic liquid property
Self-loopa is utilized, and can effectively reduce and prevent lubricant leakage, improves the service life of piston ring；
2nd, sealing lubricating arrangement of the invention can meet higher operating pressure and movement velocity；
3rd, lubricating system of the invention can be used for level, vertical or other any directions to piston movement direction without particular/special requirement；
4th, annular groove is provided with the middle of piston, be conducive to lubricant is limited near piston ring；
5th, piston adopts spindle-type α-Fe2O3, is conducive to lubricant is limited in the gap between piston and cylinder, further subtracts
The leakage of few lubricant.
Description of the drawings
Structural representations of the Fig. 1 for apparatus of the present invention；
Fig. 2 is the fundamental diagram that apparatus of the present invention piston 8 moves to terminal on the right side of stroke；
Fig. 3 is the fundamental diagram that apparatus of the present invention piston 8 moves to terminal on the left of stroke；
Fig. 4 is the apparatus structure schematic diagram described in embodiment 2；
Fig. 5 is the apparatus structure schematic diagram described in embodiment 3；
Fig. 6 is the apparatus structure schematic diagram described in embodiment 4；
Fig. 7 is the apparatus structure schematic diagram described in embodiment 5；
Fig. 8 is the annular magnet structural representation that 6 described device of embodiment is adopted.
In figure：1- piston rods, 2- gaps, 3- magnetic liquid lubrication agent, 4- annular grooves, 5- annular magnets, 6- piston rings,
7-O shape sealing rings, 8- pistons, in the middle part of 8a- pistons, 8b- pistons ends I, 8c- pistons ends II, 9- cylinders.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples, but present disclosure be not limited to embodiment and
Shown in accompanying drawing.
Embodiment 1
As shown in figure 1, a kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including piston shaft 1, magnetic liquid lubrication agent
3rd, annular magnet 5, piston 8 and cylinder 9；
Piston 8 includes 8a in the middle part of piston, II 8c of I 8b of pistons end and pistons end；In the middle part of piston, 8a is spindle, and interlude is straight
Footpath is maximum and cylindrical, and interlude accounts for 30% of 8a overall lengths in the middle part of piston, and toward in the middle part of piston, 8a two ends diameter is gradually reduced；Living
Plug middle part 8a two ends are connected with I 8b of pistons end and II 8c of pistons end respectively, and it is 70 ° that junction forms angle α；Pistons end I
8b is connected with piston shaft 1；
Piston 8 is placed in inside cylinder 9, and 9 internal diameter of cylinder is 16mm, is provided with the ring of a 2.65 × 2.65mm in the middle part of piston in the middle part of 8a
It is provided with the O-ring seals 7 that specification is 15 × 2.65 in connected in star 4, annular groove 4,7 overcoat ring plugging 6 of O-ring seals,
Piston ring 6 is contacted with 9 inwall of cylinder, and magnetic liquid lubrication agent 3 forms lubricant liquid film between 9 inwall of piston ring 6 and cylinder；
Gap 2 is formed in the middle part of piston between 9 inwall of 8a two ends and cylinder；Between 9 inwall of I 8b of pistons end and II 8c of pistons end and cylinder
Gap is less than 0.143mm；Magnetic liquid lubrication agent 3 is the Oil-based magnetic liquid of 20mL models EFH1, and its saturation magnetization is
11kA/m；
Annular magnet 5 is neodymium iron boron annular permanent magnet, and rectangular cross-section, magnetic blow out centre regional magnetic field intensity are put more than 1.5kA/m
Combine closely on the outside of cylinder 9 and with its outer surface, annular magnet 5 is located at the midpoint of 8 back and forth movement of piston, 8 stroke of piston is
30mm, it is corresponding that piston 8 remains that in motor process I 8b of pistons end and II 8c of pistons end are respectively at annular magnet 5
The both sides of position；The magnetizing direction of annular magnet 5 is radially.
Embodiment 2
With reference to the structure of embodiment 1, the present embodiment is different from embodiment 1 to be, isosceles of 5 section of annular magnet for 120 ° of drift angle
Triangle, in the middle part of Magnet, magnetic field intensity is more than both sides, and 3 drop of magnetic liquid lubrication agent being scattered is inhaled from both sides after being caught by Magnet
Center is attached to, as shown in Figure 4.
Embodiment 3
With reference to the structure of embodiment 1, the present embodiment is different from embodiment 1 to be, 8a and I 8b of pistons end and piston in the middle part of piston
The angle α of II 8c junctions of end is 45 °, and I 8b of pistons end and II 8c of pistons end is projected to form wedge angle near 2 side of gap,
As shown in figure 5, reducing angle [alpha] can more effectively prevent the leakage of lubricant.
Embodiment 4
With reference to the structure of embodiment 1, the present embodiment is different from embodiment 1 to be, is provided with three annulars recessed in the middle part of piston in the middle of 8a
Groove 4, is equipped with O-ring seals 7 and piston ring 6 in each annular groove 4, as shown in Figure 6.This structure is more beneficial for lubricant
It is limited near piston ring 6, and can further improves device bearing capacity and operation stability.
Embodiment 5
With reference to the structure of embodiment 1, the present embodiment is different from embodiment 1 to be, during in the present embodiment, piston is by multiple embodiments 1
Described piston 8 is constituted, the corresponding annular magnet 5 of each piston 8, forms multistage lubrication sealing structure as shown in Figure 7,
Can meet that piston stroke is longer, seal pressure is higher, the working condition high to piston movement stability requirement.
Embodiment 6
With reference to the structure of embodiment 1, the present embodiment is different from embodiment 1 to be, annular magnet 5 adopts polylith（Even number）N, S level
Contrary sector electromagnet alternative splicing is formed, as shown in figure 8, this magnet arrangement can produce higher ladder on 9 internal face of cylinder
The magnetic field of degree, increases the magnetic volume power suffered by magnetic liquid.
Claims (8)
1. a kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including piston shaft（1）, magnetic liquid lubrication agent（3）, ring
Shape Magnet（5）, piston（8）And cylinder（9）；
Piston（8）In the middle part of piston（8a）, pistons end I（8b）With pistons end II（8c）；In the middle part of piston（8a）For spindle
Shape, interlude diameter are maximum and cylindrical, toward in the middle part of piston（8a）Two ends diameter is gradually reduced；In the middle part of piston（8a）Two ends point
Not with pistons end I（8b）With pistons end II（8c）Connection, junction form angle α；Pistons end I（8b）With piston shaft（1）
Connection；
Piston（8）It is placed in cylinder（9）Inside, in the middle part of piston（8a）Middle part is provided with least one annular groove（4）, annular groove
（4）O-ring seals are inside provided with（7）, O-ring seals（7）Overcoat ring plugging（6）, piston ring（6）With cylinder（9）Inwall connects
Touch, magnetic liquid lubrication agent（3）In piston ring（6）With cylinder（9）Lubricant liquid film is formed between inwall；In the middle part of piston（8a）Two
End and cylinder（9）Gap is formed between inwall（2）；
Annular magnet（5）It is placed in cylinder（9）Outside is simultaneously combined closely with its outer surface, annular magnet（5）It is located at piston（8）Come and go
The midpoint of motion, piston（8）Pistons end I is remained in motor process（8b）With pistons end II（8c）It is respectively at ring
Shape Magnet（5）The both sides of correspondence position.
2. device according to claim 1, it is characterised in that in the middle part of piston（8a）Cylindrical interlude is accounted in piston
Portion（8a）The ratio of overall length is more than 25%, less than 100%.
3. device according to claim 1, it is characterised in that in the middle part of piston（8a）Two ends respectively with pistons end I（8b）
With pistons end II（8c）90 ° of the angle α ＜ that junction is formed.
4. device according to claim 1, it is characterised in that pistons end I（8b）With pistons end II（8c）With cylinder
（9）Inwall is smaller than 0.143mm.
5. device according to claim 1, it is characterised in that annular magnet（5）Magnetizing direction radially, its center
Domain magnetic field intensity is more than 1.5kA/m.
6. device according to claim 1, it is characterised in that annular magnet（5）Quantity be more than one.
7. device according to claim 1, it is characterised in that annular magnet（5）For permanent magnet.
8. device according to claim 1, it is characterised in that annular magnet（5）For an entirety, or by polylith group of magnets
Into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012909.2A CN106499824B (en) | 2017-01-09 | 2017-01-09 | A kind of reciprocating magnetic liquid self-circulation lubricating sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012909.2A CN106499824B (en) | 2017-01-09 | 2017-01-09 | A kind of reciprocating magnetic liquid self-circulation lubricating sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106499824A true CN106499824A (en) | 2017-03-15 |
| CN106499824B CN106499824B (en) | 2018-08-10 |
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| CN201710012909.2A Active CN106499824B (en) | 2017-01-09 | 2017-01-09 | A kind of reciprocating magnetic liquid self-circulation lubricating sealing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906147A (en) * | 2019-12-04 | 2020-03-24 | 王伟 | Riveting machine maintenance equipment by utilizing friction force change |
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2017
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|---|---|---|---|---|
| CN1319722A (en) * | 2001-01-03 | 2001-10-31 | 彭德恩 | Internal combustion engine cylinder and piston magnetofluid seal structure |
| CN101260941A (en) * | 2006-11-03 | 2008-09-10 | 通用电气公司 | Mechanical sealing system and method for rotary machines |
| US20110215533A1 (en) * | 2010-03-08 | 2011-09-08 | Beijing Jiaotong University | Reciprocating shaft's sealing apparatus combined a ferrofluid seal with a c-slip-ring and a yx-seal-ring |
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| CN106499824B (en) | 2018-08-10 |
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