CN1079901C - Forced-sealing oil ring - Google Patents
Forced-sealing oil ring Download PDFInfo
- Publication number
- CN1079901C CN1079901C CN97101788A CN97101788A CN1079901C CN 1079901 C CN1079901 C CN 1079901C CN 97101788 A CN97101788 A CN 97101788A CN 97101788 A CN97101788 A CN 97101788A CN 1079901 C CN1079901 C CN 1079901C
- Authority
- CN
- China
- Prior art keywords
- ring
- scraping blade
- arc
- groove
- basic ring
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Sealing Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention relates to a piston ring, particularly to an oil ring arranged on a piston in an internal combustion engine or an air compressor. The oil ring is a forcedly-sealed oil ring in the piston ring. The oil ring can eliminate leakage and oil blowby caused by the jump of a ring opening and a ring shaft; the contact area of the external circular surface of the ring and a cylinder sleeve is small, so the frictional force can be reduced, the fuel and the lubricating oil can be saved, and the service life of the piston ring is prolonged. The present invention is characterized in that grooves are arranged on the upper surfaces of both ends of the opening end of a base ring; an arc-section scraping sheet and a section of arc scraping sheet are arranged at the positions of the grooves; the inner circle surface of the base ring is provided with a spring expansion ring to form a forcedly-sealed oil ring without an opening.
Description
The present invention relates to a kind of seal oil ring, relate in particular to one forced sealing oil ring that is used on internal-combustion engine or the aerostatic press piston.
At present, the oil ring in the piston ring that the reciprocating piston seal arrangement uses, can be divided into following several: a kind of is that cylindrical has a raised line face (promptly outer ladder) oil ring; Second kind is slotted oil control ring, i.e. two raised line face oil rings; The third is the steel disc combined oil ring, promptly scrapes loop and one lining spring by two and forms.More than the common drawback of three kinds of oil rings be, at work because of encircling the wearing and tearing of periphery and cylinder sleeve surface of contact, collar extension is just magnified, ring has axial runout in annular groove, thereby produce gas leakage and scurry oil, and the area of contact of piston ring excircle face and cylinder sleeve inner headed face is big, and mechanical friction power is many, causes shorten the working life of piston ring.
The purpose of this invention is to provide a kind of forced sealing oil ring, to solve that existing oil ring collar extension is magnified and the axial runout that encircles and the gas leakage that produces and scurry oil, and the area of contact of ring periphery and cylinder sleeve inner headed face and mechanical friction power are reduced, prolong the working life of oil ring.
The present invention is achieved in that its scheme is as follows:
The sealing oil ring comprises a basic ring (the basic ring structure shape can be outer ladder and just twisting oil ring) that is provided with opening, the basic ring inner circumferential surface is provided with circumferential ring expander, the external peripheral surface top of basic ring has the convex annular eaves (sliding shoulder) that radially outward protrudes, locate at the two end part of basic ring opening end upper surface (comprising protruding eaves upper surface), be provided with the symmetrical perforation groove 4 that radially extends along basic ring, 5, interior circular arc place on groove 4 bottom planes upwards is provided with a narrow scraping blade 7 of segmental arc with connecting, an end face of the narrow scraping blade 7 of described segmental arc is concordant with ring (basic ring) mouthful end face at groove 4 places, and the perpendicular side of its another end face and groove 4 coincide.Interior circular arc place on groove 5 bottom planes upwards is provided with a narrow scraping blade 6 of segmental arc with connecting, an end face of the narrow scraping blade 6 of described segmental arc is concordant with the collar extension end face at groove 5 places, the perpendicular side of its another end face and groove 5 coincide, the interior arc-shaped surface of the narrow scraping blade 6,7 of described segmental arc is concordant with the inner circumferential surface of basic ring, its upper surface is concordant with the upper surface of basic ring, outside the external arc surface of the narrow scraping blade 6,7 of segmental arc, one section arc scraping blade 8 is set.
The internal and external circumference surface or the arc-shaped surface of described basic ring, protruding eaves, one section arc scraping blade, the narrow scraping blade of segmental arc, it all is a concentric shafts, one section arc equates with the radius on the external arc surface of the narrow scraping blade of segmental arc to the interior arc-shaped surface radius of sheet, the radius on the external arc surface of one section arc scraping blade, equate that with the external peripheral surface radius of protruding eaves the thickness of one section arc scraping blade is led the depth of groove that basic ring mouth end establishes and equated.
For the ease of making, the narrow scraping blade of one section arc scraping blade and segmental arc 6 is as a whole, and links together with the surface of contact of groove 5 bottom planes, for example can be bonding or welds together.
In order to adorn the convenience in when ring, the surface of contact of one section arc scraping blade and groove 5 bottom planes link together (can be and bond together).
For the upper side that makes above-mentioned seal oil ring and the tight contact seal of upper side of piston ring groove, axial lining spring is set in contact at the basic ring lower surface.
Convenience for when making or adorn ring is provided with a radially outer convex annular eaves in the bottom of basic ring external peripheral surface.
For the reliability of using, described basic ring inner circumference top is the cylndrical surface, and basic ring lower surface excircle place is axial downward annular boss, and the boss inner circumferential surface is a conical surface, the angle α of described conical surface and horizontal plane is 30 ° to 80 °, is provided with circumferential ring expander in contact in the conical surface bottom.
Because the present invention is provided with groove in basic ring mouth end, and on connection ground, the interior circular arc place of groove bottom plane sentence, be provided with the narrow scraping blade of segmental arc, and set one section arc scraping blade, the radial direction at collar extension place and the leakage way of axial direction have been eliminated, formed the seal oil ring of no leakage hole, even if the basic ring opening is because wearing and tearing become big, can not make yet and scurry the oil increase, because the distortion action of basic ring, and add and be provided with axial lining spring under the basic ring, or the conical surface on the basic ring cooperates the effect of the axial thrust load that produces with circumferential ring expander, thereby makes mandatory tight contact of seal oil ring upper side and piston ring groove upper side.So not only seal oil ring axially can not beated, having eliminated ring beats in piston ring groove to the wearing and tearing of annular groove, and has a function of sealing gas, especially the seal oil ring that has only a protruding eaves (sliding shoulder) to contact on the basic ring with the cylinder sleeve inner headed face, ring is little with the area of contact of cylinder sleeve, can reduce the friction of motor.So seal oil ring of the present invention can be saved fuel oil and lubricant oil, and the operational safety and the durability of raising seal oil ring
Below in conjunction with accompanying drawing specific embodiments of the invention are described.
Fig. 1 is the basic ring plan view in the forced sealing oil ring;
Fig. 2 is an embodiment's of forced sealing oil ring a plan view;
Fig. 3 is the A-A sectional drawing of Fig. 2;
Fig. 4 is the B-B sectional drawing of Fig. 2;
Fig. 5 is on embodiment basis shown in Figure 2 but basic ring 2 and narrow scraping blade 6, the 7 as a whole elements of segmental arc, and forms mouth end place's partial top view (schematic representation) of an embodiment;
Fig. 6 is the A-A sectional drawing of Fig. 5;
Fig. 7 is on embodiment basis shown in Figure 2 but the narrow scraping blade 6 of segmental arc and one section arc scraping blade 8 are as a whole and link together with groove 5 surface of contact, and forms mouth end place's partial top view (schematic representation) of an embodiment;
Fig. 8 is the A-A sectional drawing of Fig. 7;
Fig. 9 is the plan view of one section arc scraping blade 8 shape;
Figure 10 be the A of Fig. 9 to schematic representation, promptly one section arc scraping blade 8 two ends are the schematic representation of microwave shape wave;
Figure 11 only increases axially lining spring 10 at basic ring 2 lower surfaces on embodiment basis shown in Figure 2, and forms schematic cross-section in mouth end of an embodiment;
Figure 12 only increases axially lining spring 10 at basic ring 2 lower surfaces on embodiment basis shown in Figure 5, and forms schematic cross-section in mouth end of an embodiment;
Figure 13 only increases a convex annular eaves 15 in basic ring external peripheral surface bottom on embodiment basis shown in Figure 2, and form schematic cross-section in mouth end of an embodiment;
Figure 14 is the mouth end cross-sectional schematic representation of another embodiment's forced sealing oil ring;
Figure 15 only is provided with a shape gasket ring 13 below circumferential ring expander 9 on embodiment basis shown in Figure 14, and form schematic cross-section in mouth end of an embodiment;
Figure 16 is the plan view that axially serves as a contrast spring 10;
Figure 17 is the schematic representation of the A-A section of Figure 16;
Figure 18 is the schematic representation that an end place of one section arc scraping blade 8 is the microwave shape wave.
As shown in Figure 2, according to seal oil ring of the present invention, comprise a basic ring 2 that is provided with opening, basic ring 2 is seen shown in Fig. 1, top shown in the basic ring 2 external peripheral surface figure, have the convex annular eaves 1 (sliding shoulder) that is provided with described basic ring concentric shafts, the upper surface of protruding eaves 1 is concordant with the upper surface of basic ring 2, and basic ring 2 and protruding eaves 1 are as a whole.The middle part of basic ring 2 is provided with draining hole 3.Two end part upper surface (comprising protruding eaves 1 upper surface) at basic ring 2 opening ends is located, be provided with the symmetrical perforation groove 4,5 that radially extends along basic ring 2, interior circular arc place on groove 4 bottom planes connects ground (for example can be bonding or welding) a narrow scraping blade 7 of segmental arc upwards is set, an end face of the narrow scraping blade 7 of described segmental arc is concordant with the collar extension end face at groove 4 places, the perpendicular side of its another end face and groove 4 coincide (can be bonding, must not breathe freely).Interior circular arc place on groove 5 bottom planes connects ground (can be bonding or welding) a narrow scraping blade 6 of segmental arc upwards is set, an end face of the narrow scraping blade 6 of described segmental arc is concordant with the collar extension end face at groove 5 places, the perpendicular side of its another end face and groove 5 coincide (can be bonding, but must not breathe freely).The structure shape of the narrow scraping blade 6,7 of described segmental arc can be the scraping blade (radial dimension of scraping blade can be suitably narrower) in the present steel disc combined oil ring and the structure shape of blocking into the shaping thing after the plurality of sections.The interior arc-shaped surface of the narrow scraping blade 6,7 of described segmental arc is concordant with the inner circumferential surface of basic ring 2, and its upper surface is concordant with the upper surface of basic ring 2, outside the external arc surface of the narrow random sheet 6,7 of segmental arc, one section arc scraping blade 8 is set.The structure shape of described one section arc scraping blade 8 can be the scraping blade in the present steel disc combined oil ring and the structure shape of shaping thing after blocking into plurality of sections (its arc length approximates 6,7 two arc length sums of the narrow scraping blade of segmental arc).Basic ring 2 shown in the figure is flexible annulus that suitable elastic force arranged and opening is arranged, and this is identical with prior art.According to seal oil ring of the present invention, it is semicircular groove that the middle part of basic ring 2 inner circumferential surfaces is provided with a cross section, and this groove is used to hold circumferential ring expander 9, and this structure is with of the prior art identical.Circumferential ring expander 9 is set in the groove of basic ring 2 inner circumferential surfaces, and described circumferential ring expander 9 can be helical spring packing of the prior art.
The internal and external circumference surface or the arc-shaped surface of above-mentioned basic ring 2, protruding eaves 1, one section arc scraping blade 8, the narrow scraping blade 6,7 of segmental arc, it all is a concentric shafts, the radius of one section arc scraping blade 8 interior arc-shaped surface equates with the radius on the external arc surface of the narrow scraping blade 6,7 of segmental arc, the radius on one section arc scraping blade 8 external arc surface, equate groove 4,5 deep equalities that the axial thickness of one section arc scraping blade 8 and basic ring mouth end are established with the radius of the external peripheral surface of protruding eaves 1.
Fig. 5 is mouth end place's partial top view (schematic representation) of an embodiment of formation on embodiment basis shown in Figure 2 and after improving.The shape of basic ring 2 among Fig. 5 and the narrow scraping blade 6,7 of segmental arc with interconnect shown in Fig. 2 embodiment after shape identical.But forced sealing oil ring embodiment illustrated in fig. 5 is with difference embodiment illustrated in fig. 2: the basic ring 2 and narrow scraping blade 6, the 7 as a whole elements of segmental arc shown in Fig. 5.And basic ring 2 and the narrow scraping blade 6,7 of segmental arc are that three independent components link together through bonding or welding in the embodiment shown in Figure 2.Except that difference herein, the embodiment shown in Fig. 5 is identical with other parts of the embodiment shown in Fig. 2, and this does not give unnecessary details.
Fig. 7 is on example basis shown in Figure 2 and mouth end place's partial top view (schematic representation) of an embodiment who forms after improving.But the narrow scraping blade 6 of a segmental arc shown in Fig. 7 and one section arc scraping blade 8 as a whole element, and the surface of contact of groove 5 bottom planes of establishing with 2 mouthfuls of ends of basic ring is mutually bonding or welding interconnects.Except that herein with have any different shown in Fig. 2, the embodiment shown in Fig. 7 is identical with other parts of the embodiment shown in Fig. 2.
Shown in Figure 11 is the mouth end place cross section cut-away view of the forced sealing oil ring of an alternative embodiment of the invention.The embodiment that Figure 11 represents is on embodiment basis shown in Figure 2, has only set up axial lining spring 10 at basic ring 2 lower surfaces, and other parts are with shown in Figure 2 identical.
Shown in Figure 12 is the mouth end place cross section cut-away view of the forced sealing oil ring of an alternative embodiment of the invention.The embodiment that Figure 12 represents is on embodiment's shown in Figure 5 basis, has only set up axial lining spring 10 at basic ring 2 lower surfaces, and other parts are with shown in Figure 5 identical.
In Figure 11 or embodiment shown in Figure 12, when making one section arc scraping blade 8, the degree of depth that the steel disc axial thickness of one section arc scraping blade 8 is established groove 4,5 less than 2 mouthfuls of ends of (or equaling) basic ring place, place, described one section arc scraping blade 8 two ends is the microwave shape wave and (sees Figure 10, Figure 10 is that the A of Fig. 9 is to schematic representation), the straight section 16 that is connected for summit in the middle of it.Its place, two ends wave number can be determined as required, can be a ripple to several ripples.One section arc scraping blade 8 after being shaped on waveform, the axial dimension (highly) between the crest upper surface of its free state and the low-lying surface of ripple, than the depth dimensions of groove 4,5 more greatly.The manufacturing tolerances that groove 4,5 is cooperated with one section arc scraping blade 8 is suitably big, is beneficial to production in enormous quantities.Simultaneously because one section arc scraping blade 8 waviness, when making this forced sealing oil ring pack initial in the bad groove of piston into, one section arc scraping blade 8 waveform is deformed and stored elastic force.One section arc leans on the elastic force that itself has in sheet 8 work afterwards, its crest upper surface contacts with the surface of contact of piston ring groove upper side with straight section 16 upper surfaces, the magnetic that connects of the set groove of 2 mouthfuls of low-lying surface of its ripple and basic rings end 4,5 bottom planes touches, axial runout and gas leakage takes place and scurry oil when preventing 8 work of one section arc scraping blade.
Above-mentioned axial lining spring 10 is seen Figure 16, Figure 17, and Figure 17 is the A-A generalized section of Figure 16.Axially the structure shape of lining spring 10 can be identical with the structure shape of axial grommet in the present steel disc combined oil ring.Axially the upper surface of lining spring 10 contacts with the lower surface of basic ring 2, its lower surface contacts with the surface of contact of the downside of piston ring groove, axially lining spring 10 axially is compressed distortion when mounted, form axial elastic force, all the time make the tight contact seal of upper side of the upper surface and the piston ring groove of basic ring 2, axially serve as a contrast spring 10 and have the effect of letting out grease channel simultaneously.Be equiped with axial lining spring 10 in this forced sealing oil ring, then can not establish draining hole 3 on the basic ring 2.Because the axially axial elastic force effect of lining spring 10, make basic ring 2 one section arc scraping blade 8 of extruding and make it have elastic force, the crest upper surface of one section arc scraping blade 8 is closely contacted with the surface of contact of piston ring groove upper side with straight section 16 upper surfaces, and the low-lying surface of its ripple closely contacts with the surface of contact of groove 4,5 bottom planes.
Shown in Figure 13 is the sealing oil collar extension end place cross sectional view of an alternative embodiment of the invention.The structure of this seal oil ring and shown in Figure 2 basic identical, but only be that a radially outer convex annular eaves 15 is set in the bottom of basic ring 2 external peripheral surfaces.
Described one section arc scraping blade 8 bonds together with the surface of contact of groove 5 bottom planes.During this situation, the arc length of groove 5 can be lacked, and groove 4 and 5 can be asymmetric.At this moment one section selected arc scraping blade 8 can be an end place and is the microwave shape wave, and its centre and the other end are straight section 16, and its shape is seen Figure 18.For example one section arc scraping blade, 8 right-hand member straight sections, 16 lower surfaces among Figure 18 are mutually bonding with the surface of contact of groove 5 bottom planes.
Shown in Figure 14 is that the sealing oil collar extension end place cross section of an alternative embodiment of the invention is scraped view.Being provided with the embodiment among Fig. 2 of basic ring 2 among this embodiment, protruding eaves 1,4,5, one sections arc scraping blades 8 of groove, the narrow scraping blade 6,7 of segmental arc is identical.But, wherein basic ring 2 inner circumferential surfaces and lower surface change to some extent, be that its inner circumferential surface top is the cylndrical surface, its lower surface excircle place is provided with axially downward annular boss 11, described boss 11 is as a whole with basic ring 2, the inner circumferential surface of boss 11 is a conical surface 12, described conical surface 12 is 30 ° to 80 ° with the angle α of horizontal plane, bottom at described conical surface 12 is provided with circumferential ring expander 9 with it in contact, described circumferential ring expander 9 can be the helical spring packing, and this is identical with prior art.
Shown in Figure 15 is the mouth end place cross section view of the forced sealing oil ring of an alternative embodiment of the invention.The embodiment that Figure 15 represents has only set up at circumferential ring expander 9 lower surfaces on embodiment's shown in Figure 14 basis
Shape gasket ring 13.Described cross section is
The gasket ring 13 of shape also for being provided with the annulus of opening, can be steel disc and makes.Described
Have sliding shoulder 14 on the excircle of shape gasket ring, described sliding shoulder 14 can be made for not wear-resisting material, the sliding shoulder 14 that forms as plastics or rubber and with
The shape ring is bonded together.
Claims (9)
1, a kind of forced sealing oil ring, comprise a basic ring [2] that is provided with opening, basic ring [2] inner circumferential surface is provided with circumferential ring expander [9], it is characterized in that: the external peripheral surface top of basic ring [2] has the convex annular eaves [1] that radially outward protrudes, two end part upper surface (comprising protruding eaves upper surface) at basic ring [2] opening end is located, be provided with the symmetrical perforation groove [4] that radially extends along basic ring [2], [5], interior circular arc place on groove [4] bottom plane upwards is provided with a narrow scraping blade of segmental arc [7] with connecting, an end face of the narrow scraping blade of described segmental arc [7] is concordant with the collar extension end face at groove [4] place, the perpendicular side of its another end face and groove [4] coincide, interior circular arc place on groove [5] bottom plane upwards is provided with a narrow scraping blade of segmental arc [6] with connecting, an end face of the narrow scraping blade of described segmental arc [6] is concordant with the collar extension end face at groove [5] place, the perpendicular side of its other end and groove [5] coincide, the narrow scraping blade of described segmental arc [6], [7] interior arc-shaped surface is concordant with the inner circumferential surface of basic ring [2], its upper surface is concordant with the upper surface of basic ring [2], at the narrow scraping blade of segmental arc [6], [7] outside the external arc surface, one section arc scraping blade [8] is set.
2, seal oil ring according to claim 1 is characterized in that: basic ring [2] and the narrow scraping blade of segmental arc [6], [7] as a whole element.
3, seal oil ring according to claim 1 is characterized in that: one section arc scraping blade [8] and a narrow scraping blade of segmental arc [6] are as a whole, and link together with the surface of contact of groove [5] bottom plane.
4, seal oil ring according to claim 1 and 2 is characterized in that: one section arc scraping blade [8] links together with the surface of contact of groove [5] bottom plane.
5, seal oil ring according to claim 1 and 2 is characterized in that: at basic ring [2] lower surface axial lining spring [10] is set in contact.
6, seal oil ring according to claim 1 and 2 is characterized in that: the bottom at basic ring [2] external peripheral surface is provided with a radially outer convex annular eaves [15].
7, seal oil ring according to claim 1 and 2 is characterized in that: place, one section arc scraping blade [8] two ends is the microwave shape wave.
8, seal oil ring according to claim 1 and 2, it is characterized in that: described basic ring [2] inner circumference top is the cylndrical surface, basic ring [2] lower surface excircle place is axial downward annular boss [11], boss [11] inner circumferential surface is conical surface [12], described conical surface [12] is 30 ° to 80 ° with the angle α of horizontal plane, is provided with circumferential ring expander [9] in contact in conical surface [12] bottom.
9, seal oil ring according to claim 8 is characterized in that: set up at circumferential ring expander [9] lower surface
Shape gasket ring [13].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97101788A CN1079901C (en) | 1997-03-06 | 1997-03-06 | Forced-sealing oil ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97101788A CN1079901C (en) | 1997-03-06 | 1997-03-06 | Forced-sealing oil ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1193073A CN1193073A (en) | 1998-09-16 |
| CN1079901C true CN1079901C (en) | 2002-02-27 |
Family
ID=5165993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97101788A Expired - Fee Related CN1079901C (en) | 1997-03-06 | 1997-03-06 | Forced-sealing oil ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1079901C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007073684A1 (en) * | 2005-12-25 | 2007-07-05 | Xiuming Yu | Sealing oil ring |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108056B (en) * | 2021-02-22 | 2023-04-11 | 安庆帝伯格茨活塞环有限公司 | Three-combination piston oil ring with constant surface pressure and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089089U (en) * | 1991-05-03 | 1991-11-20 | 上海开源电器厂 | Oil ring |
| JPH04300466A (en) * | 1991-03-27 | 1992-10-23 | Hino Motors Ltd | Hollow abrasion-resistant ring for engine piston |
| CN2203362Y (en) * | 1994-11-04 | 1995-07-12 | 王召华 | High-elastic piston ring for IC engine |
-
1997
- 1997-03-06 CN CN97101788A patent/CN1079901C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04300466A (en) * | 1991-03-27 | 1992-10-23 | Hino Motors Ltd | Hollow abrasion-resistant ring for engine piston |
| CN2089089U (en) * | 1991-05-03 | 1991-11-20 | 上海开源电器厂 | Oil ring |
| CN2203362Y (en) * | 1994-11-04 | 1995-07-12 | 王召华 | High-elastic piston ring for IC engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007073684A1 (en) * | 2005-12-25 | 2007-07-05 | Xiuming Yu | Sealing oil ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1193073A (en) | 1998-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101529139B (en) | Radial seal and method of making | |
| EP1099069B1 (en) | Unitized oil seal and method of manufacture | |
| EP1677033B1 (en) | Gasket ring with sharp peaks | |
| CN1256506C (en) | Self lubricated non-sealed piston ring for IC engine fastener driving tool | |
| CN1083052C (en) | Quick operating and/or sealing range high temp. turbomachine contact sealing device | |
| CN1014444B (en) | Oil seal with anti-rotation convex rib | |
| CN103210245B (en) | Fluid seal assemblies | |
| JPS6065959A (en) | Seal ring for piston rod | |
| JPH08219294A (en) | Flexible fluid seal and journal seal assembly | |
| KR101446988B1 (en) | Radial Seal and Manufacturing Method Thereof | |
| CA1093111A (en) | Low friction balanced piston ring | |
| JPH05502712A (en) | Annular support for seals for tilt pistons | |
| CN1079901C (en) | Forced-sealing oil ring | |
| CN1098427C (en) | Mechanical seal system | |
| JPH0531328Y2 (en) | ||
| US6419234B1 (en) | Oil sealing ring | |
| CN2189668Y (en) | Air ring for sealing opener | |
| CN1102210C (en) | Enforced seal oil ring | |
| CN213655696U (en) | Piston ring and piston assembly | |
| US3967359A (en) | Loading device for installation of rotary engine oil sealing rings | |
| CN1239200A (en) | Oil ring with forced sealing | |
| CN1073669C (en) | Forceful sealing oil ring | |
| CN101310133B (en) | Sealing device for internal combustion engine piston | |
| CN221120134U (en) | Piston ring and internal combustion engine | |
| CN2325532Y (en) | Piston ring associated with piston crown with an overlapped connection section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |