1. A rubber oil seal is provided with an annular oil seal assembly (1), wherein the whole oil seal assembly (1) is made of rubber;

the method is characterized in that: the inner fringe face of oil blanket assembly (1) inlays and is equipped with annular seal (2), and oil blanket assembly (1) inner edge inlays and establishes the position of annular seal (2) and has seted up seal assembly groove (201), oil blanket assembly (1) wraps up in the outer fringe face that covers in annular seal (2), the outer fringe face structure of oil blanket assembly (1) has outer wall (101) of butt mounted position, and the inner fringe face bottom of oil blanket assembly (1) has and is annular lip limit (102), be equipped with the skeleton texture of control lip limit (102) to oil blanket assembly (1) axle center direction deformation degree in oil blanket assembly (1).

2. A rubber oil seal according to claim 1, wherein: a group of cavities for installing a framework structure are arranged in the oil seal assembly (1), and the framework structure is any one of a composite framework (3) or a first spring (4).

3. A rubber oil seal according to claim 2, wherein: in the group of chambers, the chamber for installing the composite framework (3) is positioned in the oil seal assembly (1) and is provided with a groove for connecting the upper inclined plane of the lip edge (102); the cavity for mounting the first spring (4) is positioned at the bottom end of the oil seal assembly (1), and a reduced funnel-shaped stoma for limiting the first spring (4) is arranged.

4. A rubber oil seal according to claim 2, wherein: the framework structure that sets up in oil blanket assembly (1) is composite framework (3), the material of annular seal (2) is polytetrafluoroethylene.

5. A rubber oil seal according to claim 2, wherein: the framework structure that sets up in oil blanket assembly (1) is spring one (4), the material of annular seal circle (2) is unanimous with the rubber material that oil blanket assembly (1) adopted.

6. A rubber oil seal according to claim 1, wherein: the oil seal assembly (1) is made of a wear-resistant and ageing-resistant rubber material, and the rubber material is composed of the following raw materials in parts by weight:

100-120 parts of acrylate rubber, 70-90 parts of nitrile rubber, 3-5 parts of silane coupling agent, 2-3 parts of dicumyl peroxide, 6-8 parts of nano silicon carbide, 5-7 parts of nano zinc oxide, 5-6 parts of nano titanium dioxide, 2-3 parts of alumina fiber, 3-5 parts of graphite powder, 1-2 parts of stearic acid and 1-2 parts of sulfur powder.

7. A rubber oil seal according to claim 6, wherein: the grain size of the nano silicon carbide is 30-50nm, the grain size of the nano zinc oxide is 40-50nm, and the grain size of the nano titanium dioxide is 20-40 nm; the diameter of the alumina fiber is 5-7um, and the length of the monofilament is 40-80 mm.

8. A press seal device for a rubber oil seal according to any one of claims 1 to 7, comprising a press seal disk (7) fitted to one side of the oil seal assembly (1), characterized in that: the pressure seal dish (7) have the multiunit towards one side of oil blanket assembly (1) and press and cover in oil blanket assembly (1) keep away from butt joint piece (9) of lip limit (102) structure position one side, multiunit butt joint piece (9) are the annular array setting around the axle center of pressing seal dish (7), still be equipped with in the pressure seal dish (7) and apply oblique pressure and pressure adjustable to butt joint piece (9) and press and cover mechanism (8).

9. Press-sealing device according to claim 8, characterised in that said pressing means (8) comprise:

an axial positioning outer tube (801) obliquely embedded in the abutting block (9) and used for positioning the elastic pressure direction of the inner structure;

an adjustable inner shaft (802), wherein the adjustable inner shaft (802) is installed in the axial positioning outer pipe (801) in a sliding mode, and the end portion of the adjustable inner shaft (802) is connected with the abutting block (9);

a second spring (803), wherein the second spring (803) is installed in the axial positioning outer tube (801) and is positioned on one side, far away from the abutting block (9), of the adjustable inner shaft (802);

the knob (804) is adjustably mounted at the end of the axial positioning outer tube (801), the knob (804) is provided with an adjustable extension part which is communicated into the axial positioning outer tube (801), and the adjustable extension part controls the second spring (803) to apply dynamic deformation when the knob (804) and the axial positioning outer tube (801) are adjusted in relative displacement.

10. A press seal arrangement as claimed in claim 9, wherein: a screw structure is arranged at the position where the abutting block (9) is connected with the adjustable inner shaft (802), a thread connecting groove (80201) matched with the screw structure is formed in one end, connected with the abutting block (9), of the adjustable inner shaft (802), and a mosaic type transmission recess (80202) for butt joint of a screwdriver is formed in one end, facing the second spring (803), of the adjustable inner shaft (802).

Background

An oil seal (oil seal) is a common name of a general seal, and simply called a seal of lubricating oil. The oil seal is a mechanical element for sealing grease (oil is the most common liquid substance in a transmission system and also refers to the general liquid substance), separates parts needing to be lubricated in a transmission part from a force output part, prevents fluid or solid particles from leaking from a combination part of the device, prevents external impurities such as dust, moisture, oil stain and the like from invading parts of internal parts of mechanical equipment, is used for separating an oil cavity from the outside, seals oil in the oil cavity, prevents dust from the outside, and is widely applied to various industries such as household appliances, automobile transmitters, chemical engineering and the like. The oil seal is mostly made of rubber materials, and mainly comprises nitrile rubber, fluororubber, silicone rubber, acrylate rubber and the like.

When the existing rubber oil seal is used for sealing the structure, the seal lip of the oil seal is abraded after long-term use to influence the protection effect of the oil seal, so that part of the oil seal has an elastic structure capable of moving centripetally (towards the axis direction) to ensure the sealing property of the lip position. However, during assembly, the oil seal lacks adaptive centripetal pressure adjustment (i.e., part of the shaft structure needs to flexibly rotate to reduce friction between the seal lip and the outer edge of the shaft, and part of the shaft structure needs to ensure the sealing performance and does not need to consider the influence caused by friction).

Disclosure of Invention

The invention aims to provide a rubber oil seal and a press sealing device thereof, which are used for solving the problem of the prior art that the oil seal lacks adaptability and centripetal pressure adjustment.

In order to achieve the purpose, the invention provides the following technical scheme: a rubber oil seal is provided with an annular oil seal assembly, and the whole oil seal assembly is made of rubber;

the inner edge surface of the oil seal assembly is embedded with an annular seal ring, a seal ring assembly groove is formed in the position where the annular seal ring is embedded in the inner edge of the oil seal assembly, the oil seal assembly is wrapped on the outer edge surface of the annular seal ring, the outer edge surface of the oil seal assembly is constructed to be abutted to the outer wall of the installation position, the bottom end of the inner edge surface of the oil seal assembly is provided with an annular lip edge, and a framework structure for controlling the deformation degree of the lip edge to the axis direction of the oil seal assembly is arranged in the oil seal assembly.

As a further preferable scheme, a group of cavities for installing a framework structure are arranged in the oil seal assembly, and the framework structure is any one of a composite framework or a first spring.

As a further preferred scheme, in the group of chambers, the chamber for installing the composite framework is positioned in the oil seal assembly and is provided with a groove for connecting the upper inclined plane of the lip edge; the chamber for installing the first spring is positioned at the bottom end of the oil seal assembly, and a reduced funnel-shaped stoma for limiting the first spring is arranged.

As a further preferable scheme, a framework structure arranged in the oil seal assembly is a composite framework, and the annular seal ring is made of polytetrafluoroethylene.

As a further preferred scheme, a framework structure arranged in the oil seal assembly is a first spring, and the material of the annular sealing ring is consistent with that of rubber used by the oil seal assembly.

The oil seal assembly (1) is made of a wear-resistant and ageing-resistant rubber material, and the rubber material is composed of the following raw materials in parts by weight: :

100-120 parts of acrylate rubber, 70-90 parts of nitrile rubber, 3-5 parts of silane coupling agent, 2-3 parts of dicumyl peroxide, 6-8 parts of nano silicon carbide, 5-7 parts of nano zinc oxide, 5-6 parts of nano titanium dioxide, 2-3 parts of alumina fiber, 3-5 parts of graphite powder, 1-2 parts of stearic acid and 1-2 parts of sulfur powder.

The grain size of the nano silicon carbide is 30-50nm, the grain size of the nano zinc oxide is 40-50nm, and the grain size of the nano titanium dioxide is 20-40 nm;

the nano titanium dioxide and the nano zinc oxide have good weather resistance and a certain antibacterial effect, and the rubber oil seal material realizes the self-cleaning function of the rubber oil seal by introducing the nano titanium dioxide and the nano zinc oxide, so that the cleaning of the rubber oil seal can be reduced, and the service life of the rubber oil seal is further prolonged.

The main chain of the acrylate rubber is a saturated carbon chain, the side group of the acrylate rubber is a polar ester group, the acrylate rubber has heat resistance, aging resistance, oil resistance and the like, the mechanical property and the processing property of the acrylate rubber are superior to those of fluororubber and silicone rubber, and the heat resistance, the aging resistance and the oil resistance of the acrylate rubber are superior to those of nitrile rubber; the nitrile rubber has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force. The disadvantages are poor low temperature resistance, ozone resistance, poor insulating property and slightly low elasticity; the addition of the nitrile rubber further improves the oil resistance, the wear resistance and the heat resistance of the acrylate rubber.

The diameter of the alumina fiber is 5-7um, and the length of the monofilament is 40-80 mm; the alumina fiber has low thermal conductivity, heating shrinkage and heat capacity, good heat-resistant stability, can be used in acid environment, oxidizing atmosphere, reducing atmosphere and vacuum condition, and has certain corrosion resistance to alkaline environment. The alumina fiber is added into the rubber component, so that not only is the thermal stability of the rubber enhanced, but also the wear resistance of the rubber is increased. The addition of graphite further improves the surface smoothness, reduces the friction coefficient and improves the resilience and mechanical property of the graphite.

The preparation method of the rubber material comprises the following steps:

1. putting 100-120 parts of acrylate rubber, 70-90 parts of nitrile rubber, 3-5 parts of silane coupling agent, 2-3 parts of dicumyl peroxide, 6-8 parts of nano silicon carbide, 5-7 parts of nano zinc oxide, 5-6 parts of nano titanium dioxide, 2-3 parts of alumina fiber, 3-5 parts of graphite powder, 1-2 parts of stearic acid and 1-2 parts of sulfur powder into an internal mixer for internal mixing to prepare the rubber material; banburying time is 10-30 minutes, and banburying temperature is 70-120 ℃;

2. and (3) putting the rubber material obtained by banburying in the step (1) into an extruder for extrusion molding to obtain the rubber material.

The pressure sealing device comprises a pressure sealing disc assembled on one side of an oil seal assembly, wherein one side of the pressure sealing disc facing the oil seal assembly is provided with a plurality of groups of abutting blocks pressed on one side of the oil seal assembly far away from the lip edge structure position, the plurality of groups of abutting blocks are arranged in an annular array around the axis of the pressure sealing disc, and a pressure covering mechanism which applies oblique pressure to the abutting blocks and is adjustable in pressure is further arranged in the pressure sealing disc.

As a further preferable aspect, the pressing mechanism includes:

the axial positioning outer pipe is obliquely embedded into the abutting block and is used for positioning the elastic pressure direction of the inner side structure;

the adjustable inner shaft is slidably arranged in the axial positioning outer pipe, and the end part of the adjustable inner shaft is connected with the abutting block;

the second spring is arranged in the axial positioning outer tube and is positioned on one side, far away from the abutting block, of the adjustable inner shaft;

the knob is adjustably arranged at the end part of the axial positioning outer tube and is provided with an adjustable extension part which is introduced into the axial positioning outer tube, and the adjustable extension part controls the second spring to apply dynamic deformation when the relative displacement of the knob and the axial positioning outer tube is adjusted.

In a further preferred embodiment, a screw structure is provided at a position where the abutment block connects with the adjustable inner shaft, one end of the adjustable inner shaft connecting abutment block is provided with a thread connecting groove adapted to the screw structure, and one end of the adjustable inner shaft facing the spring ii is provided with a tabling type transmission recess for butt joint of a screwdriver.

The invention has the technical effects and advantages that: the rubber oil seal and the press sealing device thereof benefit from the framework structure arranged in the oil seal assembly, when the framework structure is a composite framework, the selected annular sealing ring is made of rubber which is made of the same material as the oil seal assembly, and the composite framework is used as the framework structure to provide a relatively stable connecting gap, so that the rubber oil seal and the press sealing device are suitable for a shaft structure considering friction influence; when the framework structure is a spring, the lip edge moves towards the axis direction under the action of a centripetal elastic force of the spring, a cavity in which the composite framework is installed provides a space for the lip edge to elastically deform and extend, and the centripetal pressure is adjusted along with the pressure deformation brought by the abutting block at the top of the oil seal assembly, so that the composite framework is suitable for a shaft structure without considering friction influence.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the oil seal assembly of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic structural view showing an installation state of the present invention;

FIG. 5 is an enlarged schematic view of the structure of FIG. 4 at B in accordance with the present invention;

FIG. 6 is a cut-away view of the capping mechanism of the present invention.

In the figure: 1 oil seal assembly, 101 outer wall, 102 lip, 10201 annular limiting edge, 2 annular sealing ring, 201 sealing ring assembling groove, 3 composite framework, 4 spring I, 5 shaft rod, 6 assembling coordination interface, 7 press sealing disc, 701 sealing ring, 8 press covering mechanism, 801 axial positioning outer pipe, 802 adjustable inner shaft, 80201 threaded connection groove, 80202 embedded transmission recess, 803 spring II, 804 knob and 9 abutting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The invention provides a rubber oil seal as shown in figures 1, 2 and 3, which is provided with an annular oil seal assembly 1, wherein the oil seal assembly 1 is made of rubber material;

the inner edge surface of the oil seal assembly 1 is embedded with an annular seal ring 2, the position of the inner edge of the oil seal assembly 1 embedded with the annular seal ring 2 is provided with a seal ring assembly groove 201, the oil seal assembly 1 is wrapped on the outer edge surface of the annular seal ring 2, the outer edge surface of the oil seal assembly 1 is constructed with an outer wall 101 abutted to a mounting position, the bottom end of the inner edge surface of the oil seal assembly 1 is provided with an annular lip edge 102, a framework structure for controlling the deformation degree of the lip edge 102 to the axis direction of the oil seal assembly 1 is arranged in the oil seal assembly 1, wherein the lip edge 102 is provided with an annular limiting edge 10201 for controlling the extension limit of the lip edge 102, namely when the annular limiting edge 10201 is clamped in the groove, the lip edge 102 is in the extension state of the limit.

The invention provides a press sealing device as shown in fig. 4, 5 and 6, which comprises a press sealing disc 7 assembled on one side of an oil seal assembly 1, wherein one side of the press sealing disc 7 facing the oil seal assembly 1 is provided with a plurality of groups of abutting blocks 9 pressed on one side of the oil seal assembly 1 away from the lip edge 102 structural position, the plurality of groups of abutting blocks 9 are arranged in an annular array around the axis of the press sealing disc 7, a press covering mechanism 8 which applies oblique pressure to the abutting blocks 9 and has adjustable pressure is also arranged in the press sealing disc 7, during specific installation, the shaft structure for marking adaptation is a shaft lever 5, the installation position of the adaptation shaft lever 5 is an assembly position interface 6, and when the installation is carried out, one side of the press sealing disc 7 facing the assembly position interface 6 is additionally provided with a sealing ring 701.

The pressing mechanism 8 includes an axial positioning outer tube 801 obliquely embedded in the abutting block 9, an adjustable inner shaft 802, a second spring 803, and a knob 804, the positioning outer tube 801 is used for positioning the elastic pressure direction of the inner structure, the adjustable inner shaft 802 is slidably mounted in the axial positioning outer tube 801, and the end portion of the adjustable inner shaft 802 is connected with the abutting block 9, the second spring 803 is mounted in the axial positioning outer tube 801 and is located on one side of the adjustable inner shaft 802 away from the abutting block 9, the knob 804 is adjustably mounted at the end portion of the axial positioning outer tube 801, the knob 804 has an adjustable extension portion which is introduced into the axial positioning outer tube 801, and the adjustable extension portion controls the second spring 803 to apply a dynamic deformation when the knob 804 and the axial positioning outer tube 801 are.

A screw structure is arranged at the position where the abutting block 9 is connected with the adjustable inner shaft 802, a thread connecting groove 80201 matched with the screw structure is formed in one end, connected with the abutting block 9, of the adjustable inner shaft 802, and a mosaic type transmission recess 80202 for butting of a screwdriver is formed in one end, facing the second spring 803, of the adjustable inner shaft 802.

When the rubber oil seal is mounted by adapting to different shaft structures, the rubber oil seal also has two different mounting modes based on the structure, and the following modes are listed:

example I, combine FIG. 4

Set up a set of cavity that supplies framework structure to install in the oil blanket assembly 1, framework structure is compound skeleton 3 (for hard material like partial working of plastics or metalwork), the cavity that supplies compound skeleton 3 to install is located oil blanket assembly 1, and have the groove of connection lip limit 102 upper inclined plane (the groove of here is used for the dismouting of compound skeleton 3), benefit from the framework structure that sets up in the oil blanket assembly 1, when framework structure is compound skeleton 3, the annular seal ring 2 of chooseing for use is the rubber with the same material of oil blanket assembly 1, because of it provides a relatively stable connecting gap as framework structure by compound skeleton 3, be suitable for the axial construction of considering friction influence.

Example two, combine fig. 4, fig. 5 and fig. 6

The oil seal assembly 1 is internally provided with a group of cavities for installing the framework structure, the framework structure is a spring I4, the cavity for installing the spring I4 is positioned at the bottom end of the oil seal assembly 1, a reducing funnel-shaped opening (the opening is formed in the position) for limiting the spring I4 is arranged, when the framework structure is the spring I4, the lip edge 102 is displaced towards the axis direction under the action of centripetal elasticity of the spring I4, the cavity for installing the composite framework 3 provides a space for elastic deformation and extension of the lip edge 102, and the pressure deformation brought by the abutting block 9 at the top of the oil seal assembly 1 is accompanied, the adjustment of centripetal pressure is realized, and the axial structure without considering friction influence is suitable.

Example 3

The oil seal assembly (1) is made of a wear-resistant and ageing-resistant rubber material, and the rubber material is composed of the following raw materials in parts by weight: :

100 parts of acrylate rubber, 70 parts of nitrile rubber, 3 parts of a silane coupling agent, 2 parts of dicumyl peroxide, 6 parts of nano silicon carbide, 5 parts of nano zinc oxide, 5 parts of nano titanium dioxide, 2 parts of alumina fiber, 3 parts of graphite powder, 1 part of stearic acid and 1 part of sulfur powder.

The grain size of the nano silicon carbide is 30nm, the grain size of the nano zinc oxide is 40nm, and the grain size of the nano titanium dioxide is 20 nm; the diameter of the alumina fiber is 5um, and the length of the monofilament is 40 mm;

the preparation method of the rubber material comprises the following steps:

1. 100 parts of acrylate rubber, 70 parts of nitrile rubber, 3 parts of a silane coupling agent, 2 parts of dicumyl peroxide, 6 parts of nano silicon carbide, 5 parts of nano zinc oxide, 5 parts of nano titanium dioxide, 2 parts of alumina fiber, 3 parts of graphite powder, 1 part of stearic acid and 1 part of sulfur powder are put into an internal mixer for internal mixing to prepare the rubber material; banburying time is 10 minutes, and banburying temperature is 70 ℃;

2. and (3) putting the rubber material obtained by banburying in the step (1) into an extruder for extrusion molding to obtain the rubber material.

Comparative example 1

The difference between comparative example 1 and example 3 is that the silicon carbide, zinc oxide and titanium dioxide used are fischer-tropsch nanomaterials;

comparative example 2

Comparative example 2 and example 3 differ in that the same parts by weight of acrylate rubber are used instead of nitrile rubber;

comparative example 3

Comparative example 3 and example 3 differ in that the same parts by weight of nitrile rubber are used instead of acrylate rubber;

comparative example 4

Comparative example 4 is a common rubber oil seal material sold on the market;

the performance comparison of the rubber oil seal materials of example 3 of the invention and comparative examples 1 to 4 is as follows:

and (4) testing standard: HG/T2811-2008;

finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.