CN203051766U - Floating oil seal component and mechanical device with same - Google Patents
Floating oil seal component and mechanical device with same Download PDFInfo
- Publication number
- CN203051766U CN203051766U CN 201220717584 CN201220717584U CN203051766U CN 203051766 U CN203051766 U CN 203051766U CN 201220717584 CN201220717584 CN 201220717584 CN 201220717584 U CN201220717584 U CN 201220717584U CN 203051766 U CN203051766 U CN 203051766U
- Authority
- CN
- China
- Prior art keywords
- seal
- ring
- floating sealing
- floating
- float grease
- 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 - Lifetime
Links
Images
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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Mechanical Sealing (AREA)
Abstract
The utility model relates to a floating oil seal component which comprises a first seal component and a second seal component. The first seal component comprises a first floating seal ring, a first floating seal seat and a first elastic seal piece. The first elastic seal piece is arranged inside a seal cavity formed by the first floating seal ring and a first floating seal seat in a pressed mode, and the first floating seal seat defines a containing cavity used for receiving the second seal component. The second seal component comprises a seal seat, a seal ring and a second elastic seal piece. The seal seat defines a bearing face which faces towards the first floating seal ring along the axial direction and a boss which extends from the bearing face to the first floating seal ring along the axial direction, the second elastic seal piece and the seal ring are arranged on the outer periphery of the boss along the radial direction, the seal ring and the boss are at least partly located inside the containing cavity in the axial direction, and the second elastic seal piece is located inside a seal cavity formed by the bearing face, the boss and the seal ring in a pressed mode. In the state of assembling, the seal ring of the second seal component and the first floating seal ring abut against each other to form a seal end face.
Description
Technical field
The utility model belongs to the end face seal technical field, is specifically related to a kind of float grease seal assembly, and this float grease seal assembly is used for the end face seal of tight space.Related to the mechanical device that adopts described float grease seal assembly in addition.
Background technique
In order to prevent that the lubricant oil pollutants such as stoping outside silt, sandy soil simultaneously that leaks from invading device interior, between two component of mechanical structure, can adopt end face seal usually as required.For example, in, low-speed heave-load abominable in operating conditions, serious wear, the engineering machinery field that is not easy to safeguard, float grease seal is widely used in bearing seal or other dynamic and static sealing occasion as a kind of end face seal.
Fig. 1 shows the basic structure of traditional float grease seal assembly in a simplified manner.This float grease seal assembly comprises a pair of floating sealing ring 10,40 substantially, and floating sealing ring is to be saddle-shaped annulus by the axial cross section that wear-resistant metal material is made.Floating sealing ring uses in pairs, a ring rotation, and another encircles transfixion.Floating sealing ring is sealing surface near the end face that nominal outside diameter seals; A pair of floating sealing base 30,60 contains conical surface inner chamber, and the part that floating envelope also can be adjusted the floating sealing ring impacting force is installed.One cover is floating to be encapsulated in two shape symmetries, the identical floating sealing base of the size chamber; Pair of O shape circle 20,50 is contained between the inner conical surface of the male cone (strobilus masculinus) of floating sealing ring 10 or 40 and floating sealing base 30 or 60, plays the static seal effect.Simultaneously, be installed in respectively by in the Seal cage that floating sealing base and floating sealing ring were surrounded with extruded state, make the sealing surface of floating sealing ring 10 and 40 keep certain axial compressive force and form sealing contact surface (being also referred to as bright band) by its compressive strain.The sealing contact surface of each floating sealing ring is processed by grinding and abrasive process and is obtained higher surface roughness.Behind the float grease seal assembly installation in position, rely on the compressive strain of O shape circle 20,50 between the floating sealing ring 10,40 and the axial compressive force that produces, keep good fit and play nose balance and seal action.
Traditional float grease seal is usually as the extensive processed and applied of standard piece quilt that becomes series in the engineering machinery field.This traditional float grease seal has standardized Dimensions, symmetrical configuration, uses in pairs in assembling.
In the mechanical device that uses traditional float grease seal assembly, because the modular size specification of float grease seal is reserved enough big installing space so be necessary for float grease seal.But, in some occasion, for the consideration of structural requirement, in mechanical device, can't design the float grease seal that enough big installing space is installed this standard size.Therefore, how to realize in tight space that end face seal becomes a problem demanding prompt solution.
Publication No. is that the Chinese invention patent of CN102155540A discloses a kind of float grease seal for end surface mechanical sealing, wherein adopted special-shaped O shape circle on the basis of traditional float grease seal structure, described special-shaped O shape circle stretches between the floating sealing base when assembling or the gap of floating sealing ring and floating sealing base seals.Though can effectively solving silt, this structure coheres influence for float grease seal, and material and Section Design by the special-shaped O shape circle sealing surface pressure that reaches constant floating sealing ring, thereby the working life of improving float grease seal.Yet above construction package still can't solve problem how to hold the float grease seal assembly under the tight space situation.
The model utility content
In order to solve the end face seal problem that under the limited situation of installing space, realizes in the mechanical device, this float grease seal assembly the utility model proposes a kind of float grease seal assembly, even can guarantee also still can satisfy the requirement of mechanical seal under the end face of needs sealings or space surface is narrow and small mutually situation.
For achieving the above object, the utility model has adopted following technological scheme: a kind of float grease seal assembly is provided, comprises:
First black box and second black box, wherein first black box comprises first floating sealing ring, first floating sealing base and first elastomer seal, be arranged in the Seal cage of first floating sealing ring and first floating sealing base formation described first elastomer seal pressurized,
Described first floating sealing base limits for the cavity volume that receives described second black box;
Second black box comprises sealing seat, seal ring and second elastomer seal, described sealing seat limits vertically towards the supporting surface of described first floating sealing ring and the boss that is extended towards described first floating sealing ring vertically by described supporting surface, described second elastomer seal and described seal ring radially are located at the periphery of described boss, described seal ring and described boss are positioned at described cavity volume in the axial direction at least in part, and the described second elastomer seal pressurized ground is positioned at described supporting surface, in the Seal cage that boss and seal ring form, in the state of assembling, the seal ring of second black box and first floating sealing ring compress the formation seal face mutually.
Preferably, described first elastomer seal and second elastomer seal are respectively the elastic ring around described first floating sealing ring and the setting of described sealing seat.
Preferably, described elastic ring is that the cross section is circular O shape circle.
Preferably, described seal ring has taper, stepped shape or circular arc surface of contact, to contact with described second elastomer seal.
Preferably, described seal ring is flat face towards the face of described first floating sealing ring.
As alternative scheme, described seal ring is inner conical surface towards the face of described first floating sealing ring.
Preferably, described supporting surface vertically and the outer surface of described boss radially contact with described second elastomer seal simultaneously.
According to another aspect of the present utility model, a kind of mechanical device also is provided, this mechanical device is equipped with float grease seal assembly as described above.
The technical solution of the utility model is improved at the structure of existing float grease seal, mainly be to use asymmetrical structure to replace traditional float grease seal structure, wherein an end of float grease seal assembly still adopts the traditional oils seal structure based on the motive sealing principle, and the other end adopts the O shape coil structures based on the static seal principle.With respect to scheme of the prior art, the utility model has been cancelled second floating sealing base in traditional float grease seal structure, thereby has reduced traditional float grease seal structure greatly to the restriction of mechanical cavity volume, makes that the float grease seal assembly is used easily at tight space.
Description of drawings
Next in the mode that reaches specific embodiment by reference to the accompanying drawings the utility model is further described, wherein:
Fig. 1 is the axial cross section structural representation according to prior art tradition float grease seal;
Fig. 2 is the axial cross section structural representation according to the float grease seal assembly of the utility model one preferred embodiment;
Fig. 3 is the axial cross section schematic representation of first floating sealing ring.
Fig. 4 is the axial cross section schematic representation of seal ring.
The each several part mark is as follows in the accompanying drawing: 1,10 is first floating sealing ring; 2,20 is O shape circle; 3,30 is first floating sealing base; 40 is second floating sealing ring; 5,50 is the 2nd O shape circle; 60 is second floating sealing base; 4 is cavity volume; 7 is sealing seat; 7a is the supporting surface that sealing seat limits; 7b is boss; 7c is the outer surface of boss; 8 is seal ring; 8a is the surface that seal ring contacts with the 2nd O shape circle; 8b, 8c are respectively the surface that seal ring contacts with sealing seat; 9 is seal face; 11 is straight part; 12 is lug boss; 13 for supporting lip; A is become cone angle by the back of the straight part of first floating sealing ring with horizontal plane.
Embodiment
Below in conjunction with specific embodiment the technical solution of the utility model is described further.Each accompanying drawing of the present utility model is not to draw in the mode of equal proportion, and thereby does not mean that the utility model content required for protection is done any restriction.
Fig. 2 shows according to float grease seal assembly of the present utility model.This float grease seal assembly comprises first black box and second black box.First black box comprises first floating sealing ring 1, first floating sealing base 3 and O shape circle 2.The one O shape circle 2 arranges in the Seal cage of first floating sealing ring 1 and 3 formation of first floating sealing base.First floating sealing base 3 has also limited the cavity volume 4 that is used for holding second black box.Second black box comprises sealing seat 7, seal ring 8 and the 2nd O shape circle 5, and wherein sealing seat 7 has limited vertically towards the supporting surface 7a of first floating sealing ring 1 and the boss 7b that is extended towards first floating sealing ring 1 vertically by supporting surface 7a.The 2nd O shape circle 5 and seal ring 8 radially are located at the periphery of boss 7b.Seal ring 8 is positioned at the cavity volume 4 that first floating sealing base 3 limits in the axial direction at least in part with boss 7b.
Particularly, above-mentioned each parts all are set to solid of rotation.First floating sealing ring 1 in first black box, O shape circle 2 and first floating sealing base 3 for example can adopt the standard piece configuration of float grease seal.
Second black box is pressed to first floating sealing base 3 as a whole so that the peripheral part of first floating sealing ring 1 with the peripheral part of seal ring 8 mutually against, thereby form seal face 9.First floating sealing ring 1 and seal ring 8 can adopt the processing mode of the float grease seal of standard series of the prior art, are processed to form so-called bright band by grinding and abrasive process respectively, form sealing end face 9 with this.
The situation that is used for the bearing seal of mechanical device for float grease seal assembly of the present utility model, after assembling, first black box and second black box can be respectively as one group of swivel assembly with respect to another group stationary components with the plane of rotating shaft direct cross in rotate.Second black box was stationary components when namely first black box was swivel assembly, and first black box when being stationary components second black box be swivel assembly.
When producing relative rotation between first floating sealing ring 1 and the seal ring 8, the one O shape circle the 2 and the 2nd O shape circle 5 is compressed in Seal cage separately and causes resiliently deformable, the axial force that produces make win floating sealing ring 1 and seal ring 8 in separately peripheral part closely against, this moment, seal face 9 produced certain face pressure under the resilient force of O shape circle, formed and maintenance one deck oil film at seal face 9.When seal face 9 with between first floating sealing ring 1 and the seal ring 8 relatively rotate and when producing relative slip, this oil film plays the effect of sealing.
In addition, thus O shape circle the 2 and the 2nd O shape enclose 5 resiliently deformable can also be respectively to providing static seal to realize the seal request of whole sealing system with first floating sealing ring 1, first floating sealing base 3 and with the contact surface of sealing seat 7, seal ring 8.In addition, because the axial force elastic compensating scope that resiliently deformable produces is big, can ignore certain assembly error, therefore can be along with the increase of seal face 9 wearing and tearing of first floating sealing ring 1 and seal ring 8 realize nose balance automatically by the mode that discharges self elastic force, thus realize non-maintaining effect.
Along with the increase of seal face 9 wearing and tearing, the phenomenon that can occur moving in the bright band, namely seal face 9 is moved inward along internal diameter direction by the part in initial outer week gradually, and this moment, sealing effect was better.
With reference to Fig. 2 and shown in Figure 3, be bright band at first floating sealing ring 1 from described seal face 9() adopt inner conical surface formula (inclined-plane) design to the zone of internal diameter, in order in the zone that first floating sealing ring 1 does not contact with seal ring 8, form wedge gap.Correspondingly, seal ring 8, also can adopt with first floating sealing ring, 1 similar inner conical surface formula design (demonstration herein) except adopting flat face design as shown in Figure 2 towards the face of first floating sealing ring 1.
In the mechanical device running, be in by capillarity and the rotation centrifugal action that produce of the lubricant oil in first floating sealing ring 1, sealing seat 7 and the seal ring 8 formed chambers by radially and radially go up along wedge gap and enter and arrive the seal face 9 that the bright band of first floating sealing ring 1 and seal ring 8 forms, thus sufficient lubrication and the cooling of seal face 9 when between seal face 9, forming thin oil film and moving with assurance seal ring 8 relative first floating sealing rings 1.
With reference to shown in Figure 3, the axial cross section of first floating sealing ring 1 is the saddle type that has comprised straight part 11, lug boss 12 and supported lip 13, thereby the design of wherein supporting lip 13 is to break away from first floating sealing ring 1 in order to prevent that O shape circle 2 rolls at the back of the lug boss 12 of first floating sealing ring 1 conical surface in assembly process.The back of lug boss 12 and substantially horizontal form a cone angle A, and this cone angle A preferred value is 20 °.The design that cone angle is 20 ° can make the seal face 9 between first floating sealing ring 1 and the seal ring 8 obtain bigger specific contact pressure, to tackle higher built-in function pressure and to prevent the environmental contaminants intrusion.
As shown in Figure 2, in this preferred embodiment, the surperficial 8a of seal ring 8 is processed into taper shape and contacts with the 2nd O shape circle 5, and it is more simple and convenient that such design makes the processing of seal ring 8 compare traditional floating sealing ring structure.
As alternative scheme, the surperficial 8a of seal ring 8 also can be processed into other shapes according to the needs of practical structures.Shown in Fig. 4 a, Sealing 8 can be processed with the 2nd O shape circle 5 surperficial 8a that contact and be divided into two part 8a-I and 8a-II, and these two contact surface parts can be orthogonal, and this moment is L-shaped when seal ring 8 is watched in axial, cross-sectional view.Should be understood that according to the actual requirements, contact surface part 8a-I also can become an obtuse angle with angle between the 8a-II.As an alternative, shown in Fig. 4 b, Sealing 8 becomes to be when watching circular arc with the surface Machining that the 2nd O shape circle 5 contacts in axial, cross-sectional view.
In above preferred embodiment, first elastomer seal and second elastomer seal have been selected the O shape circle that arranges around described first floating sealing ring 1 and described sealing seat 7 respectively for use.Should be understood that, be that can also select the cross section for use was other shapes such as L shaped elastic ring circular O shape was enclosed except selecting the cross section for use.
In addition, the cross section of first elastomer seal and second elastomer seal is set to circle substantially for needs easy to process.But should be noted that, though this type of setting can be satisfied the sealing needs of most of operating mode, but change and make the operating mode that float grease seal lost efficacy for easily entering pressure that earth silt etc. causes the floatability of float grease seal and seal face in the Seal cage, as alternative technological scheme, any shape that is complementary can be made according to the Seal cage shape between first floating sealing ring 1 and first floating sealing base 3 in the cross section of described first elastomer seal, seals with the gap of first elastomer seal being stretched into first floating sealing ring 1 and first floating sealing base 3 when assembling.Any shape that is complementary can be made according to the Seal cage shape between sealing seat 7 and the seal ring 8 in the cross section of second elastomer seal in addition, seals with the gap of second elastomer seal being stretched into sealing seat 7 and seal ring 8 when assembling.The design of this matched shape can solve silt and cohere influence to float grease seal, thereby improves the working life of float grease seal.
In the course of working of float grease seal assembly, at first determine the size of sealing seat 7 according to the size of first floating sealing base 3 and then determine to hold seal ring 8 and size that the 2nd O shape is enclosed 5 spaces.Structure by adjusting seal ring 8 and the size of the 2nd O shape circle 5 can change the space of Seal cage between sealing seat 7 and the seal ring 8.According to the mode identical with traditional float grease seal first black box is installed during installation, then the 2nd O shape circle 5 and seal ring 8 are inserted in sealing seat 7 successively and form second black box, then the relative end of the second black box integral body from first black box is pressed into, make second black box enter at least in part in first floating sealing base 3, simultaneously by be arranged on the running shaft bounding means for example spacing collar sealing seat 7 relative rotation axis are fixed, thereby 7 pairs of the 2nd O shapes of sealing seat circle 5 plays the spacing effect of supporting.
In above each embodiment, first elastomer seal and second elastomer seal can adopt nitrile butadiene rubber (NBR), fluorine rubber (FPM) or its combination to make according to temperature, sealing medium, environmental corrosion situation and the equipment operating conditions of application to the requirement of mechanical strength, heat resistance and oil resistance.
Contrast by Figure of description 1 and 2 as can be known, the technical solution of the utility model adopts the structure of asymmetric to replace traditional float grease seal structure.Different with traditional float grease seal structure, second black box of the present utility model partly enters in first floating sealing base in the axial direction, so reduced float grease seal assembly installation dimension in the axial direction, thereby even in mechanical device structure, only existed the installing space of relative compact also can realize end face seal.Simultaneously, the part of float grease seal assembly of the present utility model is present available standard size oil sealing, so manufacture cost reduces greatly.
Below by reference to the accompanying drawings embodiment of the present utility model has been done detailed explanation, it must be noted that, above-mentioned explanation and diagram only are exemplary.The utility model is not limited to above preferred implementation, in the ken that those of ordinary skills possess, and all equivalent transformation or modifications of doing according to the utility model spirit essence, it all belongs to protection domain of the present utility model.
Claims (8)
1. float grease seal assembly comprises:
First black box and second black box, wherein first black box comprises first floating sealing ring, first floating sealing base and first elastomer seal, be arranged in the Seal cage of first floating sealing ring and first floating sealing base formation described first elastomer seal pressurized, it is characterized in that
Described first floating sealing base limits for the cavity volume that receives described second black box;
Second black box comprises sealing seat, seal ring and second elastomer seal, described sealing seat limits vertically towards the supporting surface of described first floating sealing ring and the boss that is extended towards described first floating sealing ring vertically by described supporting surface, described second elastomer seal and described seal ring radially are located at the periphery of described boss, described seal ring and described boss are positioned at described cavity volume in the axial direction at least in part, and the described second elastomer seal pressurized ground is positioned at described supporting surface, in the Seal cage that boss and seal ring form, in the state of assembling, the seal ring of second black box and first floating sealing ring compress the formation seal face mutually.
2. float grease seal assembly as claimed in claim 1 is characterized in that, described first elastomer seal and second elastomer seal are respectively the elastic ring around described first floating sealing ring and the setting of described sealing seat.
3. float grease seal assembly as claimed in claim 2 is characterized in that, described elastic ring is that the cross section is circular O shape circle.
4. as each described float grease seal assembly of claim 1 to 3, it is characterized in that described seal ring has taper, stepped shape or circular arc surface of contact, to contact with described second elastomer seal.
5. float grease seal assembly as claimed in claim 4 is characterized in that, described seal ring is flat face towards the face of described first floating sealing ring.
6. float grease seal assembly as claimed in claim 4 is characterized in that, described seal ring is inner conical surface towards the face of described first floating sealing ring.
7. as each described float grease seal assembly of claim 1 to 3, it is characterized in that, described supporting surface vertically and the outer surface of described boss radially contact with described second elastomer seal simultaneously.
8. a mechanical device is characterized in that, described mechanical device has according to each described float grease seal assembly of aforementioned claim.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220717584 CN203051766U (en) | 2012-12-21 | 2012-12-21 | Floating oil seal component and mechanical device with same |
| DE201310225713 DE102013225713A1 (en) | 2012-12-21 | 2013-12-12 | floating oil seal assembly and mechanical device with the oil seal assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220717584 CN203051766U (en) | 2012-12-21 | 2012-12-21 | Floating oil seal component and mechanical device with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051766U true CN203051766U (en) | 2013-07-10 |
Family
ID=48734720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220717584 Expired - Lifetime CN203051766U (en) | 2012-12-21 | 2012-12-21 | Floating oil seal component and mechanical device with same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203051766U (en) |
| DE (1) | DE102013225713A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943936A (en) * | 2019-12-11 | 2021-06-11 | 股份公司摩拓乐 | Floating seal assembly |
| CN114110168A (en) * | 2021-11-29 | 2022-03-01 | 徐州徐工履带底盘有限公司 | Matching design method for assembling relation of thrust wheels |
| CN114136193A (en) * | 2021-11-29 | 2022-03-04 | 徐州徐工履带底盘有限公司 | Method for acquiring deformation of sealing element in floating sealing structure |
| CN116222887A (en) * | 2022-12-30 | 2023-06-06 | 天地上海采掘装备科技有限公司 | Multi-bit state testing device and testing method for floating oil seal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747037B (en) * | 2019-10-31 | 2023-04-07 | 新疆金风科技股份有限公司 | Shafting structure, sealing assembly and wind generating set |
-
2012
- 2012-12-21 CN CN 201220717584 patent/CN203051766U/en not_active Expired - Lifetime
-
2013
- 2013-12-12 DE DE201310225713 patent/DE102013225713A1/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943936A (en) * | 2019-12-11 | 2021-06-11 | 股份公司摩拓乐 | Floating seal assembly |
| CN114110168A (en) * | 2021-11-29 | 2022-03-01 | 徐州徐工履带底盘有限公司 | Matching design method for assembling relation of thrust wheels |
| CN114136193A (en) * | 2021-11-29 | 2022-03-04 | 徐州徐工履带底盘有限公司 | Method for acquiring deformation of sealing element in floating sealing structure |
| CN116222887A (en) * | 2022-12-30 | 2023-06-06 | 天地上海采掘装备科技有限公司 | Multi-bit state testing device and testing method for floating oil seal |
| CN116222887B (en) * | 2022-12-30 | 2023-09-22 | 天地上海采掘装备科技有限公司 | Multi-bit state testing device and testing method for floating oil seal |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013225713A1 (en) | 2014-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203051766U (en) | Floating oil seal component and mechanical device with same | |
| CN202091519U (en) | Magnetic liquid rotating sealing device | |
| CN102182830A (en) | Rotary sealing device for magnetic liquid | |
| CN105464882A (en) | Main shaft seal device and axial flow turbine with same | |
| CN202946020U (en) | Cone bit bearing assembly with monometallic sealing system and floating bearing system combined | |
| CN103629357B (en) | The sealing mechanism of vane type rotary valve | |
| CN201651328U (en) | Mechanical seal device convenient to disassemble and assemble | |
| CN201661608U (en) | Bearing seal assembly for rolling mills | |
| CN207470779U (en) | A kind of elastic floating ring oil sealing of journal bearing | |
| CN105465338A (en) | Axial-limiting antifriction structure | |
| CN205330867U (en) | Shaft seal device and have device's axial flow turbine | |
| CN204437073U (en) | A kind of combination-inlaying formula self oiling bearing | |
| CN104747723A (en) | Efficient shaft sealing structure of screw compressor | |
| CN104712659A (en) | Thrust ball bearing | |
| CN104295749A (en) | Bearing sealing device | |
| CN102506178B (en) | Mechanical sealing part | |
| CN102116307A (en) | Labyrinth-type sealing device for bearing on centrifugal pump | |
| CN201651040U (en) | Bearing with iron space ring | |
| CN207018350U (en) | It is a kind of from pretension four-point contact ball | |
| CN104964035A (en) | Sealing ring and rotary sealing device thereof | |
| CN204677489U (en) | Mechanical seal device | |
| CN219221055U (en) | IP67 bearing isolator | |
| CN208431283U (en) | A kind of pivoting support of high pressure resistant environment | |
| CN102200138B (en) | Seal special for thick oil pump | |
| CN202811314U (en) | Tandem type mechanical seal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |