CN205618669U - Flexible oil blanket structure - Google Patents

Abstract

The utility model discloses a flexible oil blanket structure, it includes the annular supporter of circle, lies in the seal lip of supporter and arrange the flexible body between the inner wall of seal lip and supporter, the primary seal lip of position in the middle part of the seal lip includes the vertical connecting portion of being connected one end and flexible body bottom and is located vertical connecting portion inner wall, the back is arranged in the flexible body slope form first regulation recess between supporter and the flexible body. Through the flexible body that the slope was arranged, can follow radial stretching out and drawing back, realize elastic deformation to the off -centre or the unbalance loading of automatic compensation axle also can compensate because of the off -centre of flange or end cover leads to the clearance of contracting and producing with the decentraction of axle, realize good sealed effect, the deformation that is the flexible body through first regulation recess provides effective space, realizes effectual elastic expansion.

Description

A flexible oil seal structure

technical field

The utility model relates to a sealing element in the field of mechanical seal research, in particular to a flexible oil seal structure.

Background technique

The rotating shaft lip seal is called oil seal for short. It is the most commonly used sealing element in various mechanical equipment. important role. The domestic rotary shaft lip seal structure is specified in GB/T 9877--2008.

In all kinds of oil seals currently used, the shaft is generally not allowed to have too much runout, so as to achieve a good sealing effect; when the equipment itself is installed eccentrically, the oil seal and the shaft will have a problem of misalignment after installation; at the same time When there is an eccentric load or excessive jump during the operation of the equipment, the current ordinary oil seals cannot meet the requirements of the working conditions.

Utility model content

The purpose of this utility model is to provide a flexible oil seal structure. When there is eccentricity or eccentric load on the shaft, the flexible body can automatically compensate the value of eccentricity or eccentric load to prevent the gap between the sealing lip and the shaft, thereby effectively ensuring a good sealing effect .

The solution of the utility model to solve the technical problem is: a flexible oil seal structure, which includes an annular support body, a sealing lip located in the support body, and a flexible body arranged between the sealing lip and the inner wall of the support body. The sealing lip includes a vertical connection part connected to the bottom of the flexible body at one end and a main sealing lip located in the middle of the inner wall of the vertical connection part. After the flexible body is arranged obliquely, a first adjustment recess is formed between the support body and the flexible body. groove.

As a further improvement of the above technical solution, an obliquely arranged secondary sealing lip is provided on the inner wall of the vertical connecting portion.

As a further improvement of the above technical solution, at least one annular boss is arranged on the end surface of the support body close to the main sealing lip.

As a further improvement of the above technical solution, a second adjustment groove is arranged between the flexible body and the vertical connection part.

As a further improvement of the above technical solution, a pre-tension spring is installed on the outer wall of the vertical connection portion, and the pre-tension spring is opposite to the main sealing lip.

As a further improvement of the above technical solution, the support body is a plastic material component or a metal material component.

As a further improvement of the above technical solution, the cross section of the first adjustment groove is U-shaped or V-shaped.

The beneficial effects of the utility model are: the utility model can expand and contract in the radial direction through the flexible body arranged obliquely, and realize elastic deformation, so as to automatically compensate the eccentricity or eccentric load of the shaft, and can also compensate for the eccentricity of the flange or the end cover. The gap generated by the non-concentric contraction with the shaft achieves a good sealing effect; the first adjustment groove provides an effective space for the deformation of the flexible body to achieve effective elastic expansion and contraction.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following will briefly describe the accompanying drawings that are used in the description of the embodiments. Apparently, the drawings described are only some embodiments of the utility model, not all embodiments, and those skilled in the art can also obtain other designs and drawings according to these drawings without creative work.

Fig. 1 is a sectional view of the utility model.

detailed description

The idea, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present utility model. Apparently, the described embodiments are only some of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without paying creative efforts, All belong to the protection scope of the utility model. In addition, all the connection/connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

Referring to Fig. 1 , a flexible oil seal structure includes an annular support body 1, a sealing lip located in the support body 1, and a flexible body 2 arranged between the sealing lip and the inner wall of the support body 1, the sealing lip It includes a vertical connection part 4 connected to the bottom of the flexible body 2 at one end and a main sealing lip 3 located in the middle of the inner wall of the vertical connection part 4. The other end of the vertical connection part 4 is a free end, and the main sealing lip 3 is close to the vertical connection The free end of the part 4, the first adjustment groove 6 is formed between the support body 1 and the flexible body 2 after the flexible body 2 is arranged obliquely.

The flexible body 2 arranged obliquely can expand and contract in the radial direction to achieve elastic deformation, thereby automatically compensating for the eccentricity or eccentric load of the shaft, and can also compensate for the gap caused by the non-concentric shrinkage of the flange or end cover caused by the eccentricity of the flange or end cover. , to achieve a good sealing effect; through the first adjustment groove 6 to provide an effective space for the deformation of the flexible body 2, to achieve effective elastic expansion and contraction.

As a further preferred embodiment, the inner wall of the vertical connecting portion 4 is provided with an obliquely arranged auxiliary sealing lip 5 . The supporting body 1 and the annular boss 7 are installed in the flange cover, and the main sealing lip 3 and the auxiliary sealing lip 5 are installed on the shaft or the shaft sleeve. The main sealing lip 3 acts as an oil seal to prevent leakage of the lubricating medium inside the bearing; the auxiliary sealing lip 5 acts as a dust-proof function to prevent external impurities and dust from entering the sealing system. The flexible body 2, the primary sealing lip 3 and the secondary sealing lip 5 are made of rubber and plastic materials, preferably NBR. The flexible body 2 , the main sealing lip 3 , the vertical connection portion 4 and the secondary sealing lip 5 are integrated and connected to the supporting body 1 through the flexible body 2 .

As a further preferred embodiment, at least one annular boss 7 is arranged on the end surface of the support body 1 close to the main sealing lip 3 . The annular boss 7 acts as a seal on the end face to prevent the lubricating medium from leaking from the plane through the outer circle. There can be one, two or more annular bosses 7 .

Further as a preferred embodiment, a second adjustment groove 9 is arranged between the flexible body 2 and the vertical connecting portion 4 . The second adjustment groove 9 provides an effective space for the micro-deformation of the flexible body 2 to achieve effective elastic expansion and contraction. The first adjustment groove 6, the second adjustment groove 9 and the pre-tension spring 8 ensure that the main sealing lip 3 is tightly connected to the shaft snug fit for a good seal.

Further as a preferred embodiment, a pre-tension spring 8 is installed on the outer wall of the vertical connection portion 4 , and the pre-tension spring 8 is opposite to the main sealing lip 3 . The pre-tightening spring 8 provides pre-tightening force for the main sealing lip 3 to ensure that the main sealing lip 3 fits closely with the shaft to achieve a good sealing effect. Preload spring 8 adopts spring steel material, preferably stainless steel.

As a further preferred embodiment, the support body 1 is a plastic material member or a metal material member. The plastic material components can be ABS components or PP components, and the metal material components can be copper components, copper alloy components or aluminum alloy components. The support piece can also be a cotton member, and the support piece mainly plays a supporting and fixing role, which is convenient for installation.

As a further preferred embodiment, the cross-section of the first adjustment groove 6 is U-shaped or V-shaped, and the cross-section of the second adjustment groove 9 is also U-shaped or V-shaped. Of course, the cross-sections of the first adjusting groove 6 and the second adjusting groove 9 can also be designed in other shapes according to actual needs.

The above is a specific description of the preferred embodiments of the present utility model, but the invention is not limited to the described embodiments, those skilled in the art can also make various equivalent modifications without violating the spirit of the present utility model Or replacement, these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims (7)

1. a flexible oil seal structure, it is characterized in that: it includes circular supporter, sealing lip in supporter and the flexible body being arranged between sealing lip and the inwall of supporter, described sealing lip includes one end and the vertical connecting portion being connected bottom flexible body and the primary seal lip being positioned at vertical connecting portion inwall medium position, and described flexible body forms the first adjusting grooves between described supporter and flexible body after being in tilted layout.

Flexible oil seal structure the most according to claim 1, it is characterised in that: it is provided with the secondary sealing lip being in tilted layout on the inwall of described vertical connecting portion.

Flexible oil seal structure the most according to claim 1 and 2, it is characterised in that: described supporter arranges at least one annular boss on the end face of primary seal lip.

Flexible oil seal structure the most according to claim 1 and 2, it is characterised in that: it is disposed with the second adjusting grooves between described flexible body and vertically connecting portion.

Flexible oil seal structure the most according to claim 1 and 2, it is characterised in that: the outer wall of described vertical connecting portion is provided with preloading spring, and described preloading spring is relative with described primary seal lip.

Flexible oil seal structure the most according to claim 1 and 2, it is characterised in that: described supporter is plastic material component or metallic material components.

Flexible oil seal structure the most according to claim 1 and 2, it is characterised in that: the U-shaped profile of described first adjusting grooves or V-arrangement.