阅读说明：本技术 一种复合型破壁机油封 (Compound broken wall machine oil blanket ) 是由 卢木清 于 2020-07-23 设计创作，主要内容包括：本发明涉及电机轴油封技术领域,具体公开了一种复合型破壁机油封。该油封由外油封和内油封复合而成,其中外油封包括外骨架、外橡胶密封体,外橡胶密封体向内并斜向上延伸有副唇,所述内油封包括内骨架、内橡胶密封体,内橡胶密封体向内并斜向上延伸有主唇,所述内橡胶密封体和外橡胶密封体紧密接触配合,所述主唇和副唇的唇口部为聚四氟乙烯层。本发明在常规的密封唇的接触面上增加了薄的聚四氟乙烯层,使油封兼具了追随性强,密封性能好,耐磨性强的优点。(The invention relates to the technical field of motor shaft oil seals, and particularly discloses a composite wall breaking machine oil seal. This oil blanket is formed by outer oil blanket and interior oil blanket complex, and wherein outer oil blanket includes outer skeleton, outer rubber seal, and the inside and slant of outer rubber seal extend upward has vice lip, interior oil blanket includes inner skeleton, interior rubber seal, and the inside and slant of interior rubber seal extends upward has main lip, interior rubber seal and the cooperation of outer rubber seal in close contact with, the lip oral area of main lip and vice lip is the polytetrafluoroethylene layer. According to the invention, the thin polytetrafluoroethylene layer is added on the contact surface of the conventional sealing lip, so that the oil seal has the advantages of strong following performance, good sealing performance and strong wear resistance.)

1. The utility model provides a compound broken wall machine oil blanket which characterized in that: form by outer oil blanket (1) and interior oil blanket (2) complex, wherein outer oil blanket (1) includes outer skeleton (11), outer rubber seal (12), and outer rubber seal (12) inwards and upwards extend to one side has vice lip (13), interior oil blanket (2) are including inner skeleton (21), interior rubber seal (22), and interior rubber seal (22) inwards and upwards extend to one side has main lip (23), interior rubber seal (22) and outer rubber seal (12) in close contact with cooperation, the lip portion of main lip (23) and vice lip (13) is polytetrafluoroethylene layer (3).

2. The oil seal of the composite wall breaking machine according to claim 1, characterized in that: the inner diameter of a sealing opening formed by the main lip (23) is smaller than that of a sealing opening formed by the auxiliary lip (13).

3. The oil seal of the composite wall breaking machine according to claim 1, characterized in that: the outer frame (11) is L-shaped, the inner frame (21) is inverted L-shaped, and the main lip (23) and the auxiliary lip (13) extend out of the end portion of the L-shaped frame.

4. The oil seal of the composite wall breaking machine according to claim 1, characterized in that: the outer side surface of the outer rubber sealing body (12) is provided with a plurality of annular convex patterns (14).

5. The oil seal of the composite wall breaking machine according to claim 1, characterized in that: the outer side surface of the inner rubber sealing body (22) is provided with a plurality of annular convex patterns (14).

6. The oil seal of the composite wall breaking machine according to claim 1, characterized in that: and chamfers (4) are arranged at the upper end and the lower end of the outer side surface of the outer rubber sealing body (12).

Technical Field

The invention relates to the technical field of motor shaft oil seals, in particular to a composite wall breaking machine oil seal.

Background

The oil seal is a mechanical element for sealing oil, and separates a part needing lubrication in a transmission part from a force-applying part, so that the lubricating oil is prevented from leaking. The seal of the oil seal is formed by interference fit between a flexible sealing element (leather, rubber, polytetrafluoroethylene, polychlorotrifluoroethylene, polyimide, or the like) and the rotating shaft.

The main shaft of the wall breaking machine has ultrahigh rotating speed (more than 22000 rpm), can instantaneously break the cell walls of the vegetables and the fruits and can effectively extract phytochemicals. And the ultrahigh rotating speed puts higher requirements on the oil seal. In the prior art, when a common oil seal is used, a lubricant is generally needed, the problems of poor wear resistance and large friction force exist during use, and the following performance of pure Teflon (polytetrafluoroethylene and PTFE) is poor, so that a lot of limitations are caused in the use process, the requirements of rotating speed and dry grinding performance cannot be met, and particularly, when the oil seal is subjected to dry grinding, serious failure of the oil seal is easily caused.

Disclosure of Invention

The invention solves the problems that: broken wall machine oil blanket sealed effect is not good among the prior art, and is wear-resisting poor, provides one kind and has the strong and compound broken wall machine oil blanket of dry grinding resistant of following performance concurrently.

The invention is realized by the following technical scheme that the composite wall breaking machine oil seal is formed by compounding an outer oil seal and an inner oil seal, wherein the outer oil seal comprises an outer framework and an outer rubber sealing body, the outer rubber sealing body inwards and obliquely upwards extends to form an auxiliary lip, the inner oil seal comprises an inner framework and an inner rubber sealing body, the inner rubber sealing body inwards and obliquely upwards extends to form a main lip, the inner rubber sealing body is tightly contacted and matched with the outer rubber sealing body, and lip openings of the main lip and the auxiliary lip are polytetrafluoroethylene layers.

Further, the inner diameter of a sealing opening formed by the main lip is smaller than that of a sealing opening formed by the auxiliary lip.

Further, a broken wall machine oil blanket, its characterized in that: the outer skeleton is L shape, the inner frame is the shape of falling L, main lip and vice lip all extend out from the tip of L shape skeleton.

Furthermore, a plurality of annular convex patterns are arranged on the outer side surface of the outer rubber sealing body.

Furthermore, a plurality of annular convex patterns are arranged on the outer side surface of the inner rubber sealing body.

Furthermore, the upper end and the lower end of the outer side surface of the outer rubber sealing body are provided with chamfers.

The invention has the beneficial effects that:

1. the invention adopts double-lip design and has different inner diameters, and can adapt to deflection under different high-speed rotation working conditions so as to ensure the sealing effect.

2. The lip part is made of polytetrafluoroethylene, has excellent weather resistance, high and low temperature resistance and low friction coefficient, and can adapt to the working condition of high-rotating-speed dry grinding of a wall breaking machine.

3. The lip base material of the invention adopts conventional rubber, which does not affect the following performance and ensures the sealing effect.

4. The invention adopts a composite structure, is divided into an outer oil seal and an inner oil seal, is provided with frameworks, is beneficial to production and installation, keeps stable and increases the structural rigidity.

Drawings

Fig. 1 is a schematic structural diagram of a composite wall breaking machine oil seal according to the invention.

In the figure: 1. an outer oil seal; 11. an outer skeleton; 12. an outer rubber seal body; 13. the minor lip; 14. an annular relief; 2. an inner oil seal; 21. an inner skeleton; 22. an inner rubber seal body; 23. a main lip; 3. a polytetrafluoroethylene layer; 4. and (6) chamfering.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, a composite wall-breaking machine oil seal is formed by compounding an outer oil seal 1 and an inner oil seal 2, wherein the outer oil seal 1 comprises an outer framework 11 and an outer rubber sealing body 12, the outer rubber sealing body 12 extends inwards and upwards obliquely to form a secondary lip 13, the inner oil seal 2 comprises an inner framework 21 and an inner rubber sealing body 22, the inner rubber sealing body 22 extends inwards and upwards obliquely to form a main lip 23, the inner rubber sealing body 22 and the outer rubber sealing body 12 are in close contact fit, the sealing effect can be enhanced by adopting a double-lip design, lip parts of the main lip 23 and the secondary lip 13 are polytetrafluoroethylene layers 3, the main lip 23 and the secondary lip 13 adopt conventional materials as base materials, such as NBR (nitrile butadiene rubber), ACM (acrylate rubber), FKM (fluorine rubber), MVQ (methyl vinyl silicone rubber), EPDM (ethylene propylene diene monomer) and the like, better following performance is kept, and meanwhile, a polytetrafluoroethylene layer is arranged at a sealing surface of the lip part, the polytetrafluoroethylene has excellent chemical resistance, high and low temperature resistance and low friction, makes up for the defects of the conventional lip material, and can adapt to the use environment with extremely high rotating speed.

In practical application, the inner diameter of the sealing opening formed by the main lip 23 is smaller than that formed by the auxiliary lip 13, so that the shaft can adapt to deflection under different high-rotation-speed working conditions, and the sealing effect is ensured.

In practical application, a broken wall machine oil blanket, its characterized in that: the outer frame 11 is L-shaped, the inner frame 21 is inverted L-shaped, the main lip 23 and the auxiliary lip 13 extend out from the end part of the L-shaped frame, the structural stability is guaranteed, and the structural rigidity is increased.

In practical application, the lateral surface of outer rubber seal 12 is equipped with a plurality of cyclic annular wales 14, and each ring of cyclic annular wale 14 all with mounting hole in close contact with during the installation, forms multichannel sealing, is favorable to the oil blanket installation, and the leakproofness is good, is particularly suitable for high thermal expansion material pilot hole and uses under high temperature environment.

In practical application, the outer side surface of the inner rubber sealing body 22 is provided with a plurality of annular convex patterns 14, so that the sealing performance of the combination of the inner oil seal 2 and the outer oil seal 1 is better.

In practical application, chamfers 4 are arranged at the upper end and the lower end of the outer side surface of the outer rubber sealing body 12, so that oil sealing is convenient to install.

The working principle of the invention is as follows:

after the assembly is completed, the main lip 23 and the auxiliary lip 13 are in interference fit with the shaft, the contact surface of the lip and the shaft is the polytetrafluoroethylene layer 3, the low-friction performance is achieved, the high-speed rotation dry grinding of the shaft can be resisted, meanwhile, the polytetrafluoroethylene layer 3 is thinner, the base material is made of conventional rubber materials, the follow-up performance is better under the condition of shaft deflection, the inner diameter of the main lip 23 is slightly smaller than that of the auxiliary lip 13, the oil seal can adapt to deflection under different working conditions, and the sealing effect is ensured.

In conclusion, the composite wall-breaking engine oil seal disclosed by the invention has the advantages of strong following performance, good sealing performance and strong wear resistance.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical spirit and features of the present invention, and the present invention is not limited thereto but may be implemented by those skilled in the art.