CN210920110U

CN210920110U - Double-lip combined skeleton shaft seal

Info

Publication number: CN210920110U
Application number: CN201921813327.5U
Authority: CN
Inventors: 徐海林; 杨栋
Original assignee: Wuxi Interpump Weifu Hydraulics Company Ltd
Current assignee: Wuxi Interpump Weifu Hydraulics Company Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-03
Anticipated expiration: 2029-10-25

Abstract

The utility model belongs to the technical field of the sealing member, a two lips mouth combination skeleton bearing seal is related to, including the exoskeleton, the internal frame that the compaction was provided with the emission in order in the mounting groove that the exoskeleton formed, gasket one, internal frame two, gasket two and seal ring, the surface of internal frame one supports to lean on the binding off portion internal surface that forms in exoskeleton axial one end, and seal ring tight fit sets up between the axial skeleton baffle that gasket two and exoskeleton axial other end formed, the radial inner of gasket one, gasket two forms the lip of buckling the extension towards the axial respectively. The framework shaft seal can achieve a good sealing effect and can bear high pressure and high rotating speed.

Description

Double-lip combined skeleton shaft seal

Technical Field

The utility model belongs to the technical field of the sealing member, a lip combination skeleton bearing seal is related to.

Background

Skeletal shaft seals are a typical representation of shaft seals, and are generally referred to as skeletal shaft seals. The function of the shaft seal is generally to prevent leakage of hydraulic oil. The framework acts as a reinforcement for the steel bars inside the concrete member and allows the shaft seal to maintain shape and tension. According to the structure, the single-lip framework shaft seal and the double-lip framework shaft seal can be separated. The vice lip of two lip skeleton bearing seals plays dustproof effect, prevents inside external dust, impurity etc. get into the machine, and partial two lips are two the spring in addition, can 2 directions simultaneously sealed. The framework type shaft seal can be divided into an inner-wrapped framework shaft seal, an exposed framework shaft seal and an assembled shaft seal. It can be divided into rotary frame shaft seal and reciprocating frame shaft seal according to working conditions. The crankshaft is used for gasoline engines, diesel engines, gearboxes, differentials, shock absorbers, engines, gear pumps, plunger pumps, axles and the like.

Disclosure of Invention

The utility model provides a to above-mentioned problem, a lip combination skeleton bearing seal is provided, this skeleton bearing seal can play better sealed effect, can bear higher pressure and rotational speed.

According to the technical scheme of the utility model: a kind of double lip makes the skeleton shaft seal up, characterized by that: including the exoskeleton, the internal frame that the pressure was provided with in the mounting groove that the exoskeleton formed in order was provided with first, gasket one, second, gasket two and seal ring, and the surface of internal frame one supports and leans on the binding off portion internal surface that forms in exoskeleton axial one end, and seal ring tight fit sets up between the axial skeleton baffle that second and exoskeleton axial other end formed, the radial inner of gasket one, gasket two forms the lip of buckling the extension towards the axial respectively.

As a further improvement of the utility model, the lip is in a conical shape.

As a further improvement of the utility model, the inner diameters of the sealing washer, the inner frame II and the inner frame III are consistent.

As a further improvement of the utility model, the width of the inner frame II is larger than that of the inner frame I.

As a further improvement of the utility model, the lip of the first gasket extends axially and the far end is on the same horizontal plane with the outer surface of the first inner frame.

As a further improvement of the utility model, the vertex angle of the outer skeleton is in circular arc transition.

As a further improvement, the inner diameter of the axial framework baffle plate of the outer framework close to one end of the sealing washer is smaller than the inner diameter of the inner framework I.

As a further improvement of the utility model, the specifications of the first gasket and the second gasket are consistent.

The technical effects of the utility model reside in that: the shaft seal of the product structure of the utility model can bear higher pressure than the common shaft seal and can resist pressure to 2.5 Mpa; two seals are arranged in one direction, so that the sealing effect is better guaranteed; the PV value of the oil seal can reach 10 Mpa.m/s; the PTFE has low lip friction coefficient and can be applied under the conditions of-160 ℃ to 250 ℃.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In fig. 1, the gasket comprises a second inner frame 1, a sealing gasket 2, an outer frame 3, a lip 4, a second gasket 5, a first inner frame 6, a first gasket 7 and the like.

As shown in fig. 1, the utility model relates to a two lips combination skeleton bearing seal, including exoskeleton 3, compress tightly in the mounting groove that exoskeleton 3 formed and be provided with one 6 of the inner frame, gasket one 7, two 1 of the inner frame, two 5 of gasket and seal ring 2 that discharge in order, the surface of one 6 of the inner frame supports to lean on the binding off portion internal surface that forms in 3 axial one ends of exoskeleton, seal ring 2 tight fit sets up between the axial skeleton baffle that 3 axial other ends of gasket two 5 and exoskeleton formed, the radial inner of gasket one 7, two 5 forms respectively towards the lip 4 that the axial was buckled and is extended.

Lip 4 is the toper form, and in the concrete design, lip 4 is the circular arc transition with the discoid part of gasket, and seal ring 2, inner frame two 1, inner frame 6 three internal diameter are unanimous.

The width of the inner framework II 1 is larger than that of the inner framework I6.

The far end of the lip of the first gasket 7, which extends along the axial direction, is on the same horizontal plane with the outer surface of the first inner framework 6.

The vertex angle of the outer framework 3 is in circular arc transition, and the inner diameter of the axial framework baffle plate at one end, close to the sealing washer 2, of the outer framework 3 is smaller than that of the inner framework I6.

The specifications of the first gasket 7 and the second gasket 5 are consistent, and the first gasket 7 and the second gasket 5 are made of polytetrafluoroethylene materials. The utility model discloses outer skeleton 3 in the product includes the circular ring form closing part end plate and the circular ring form axial skeleton baffle and is used for the cylindric portion that is connected closing part end plate and axial skeleton baffle. The minimum inner diameter of the lip 4 is smaller than the inner diameter of the exoskeleton 3.

The utility model discloses the intensity of bearing seal itself has not only been strengthened to inner frame 6, inner frame two 1 and exoskeleton 3 in the product, and the sealed effect of ideal can be played to lip 4 and seal ring 2 simultaneously, and seal ring 2 is fluororubber seal ring. In addition, the bearing can bear higher pressure than the common single-lip single-spring shaft seal and the double-lip double-spring shaft seal during operation. In addition, the gasket I7 and the gasket II 5 are made of polytetrafluoroethylene materials, the friction coefficient is extremely small, the high and low temperature resistance range is wide, the gasket can be used at the temperature of minus 190-260 ℃, and the polytetrafluoroethylene gasket used as the lip 4 not only has various advantages of sealing the shaft seal, but also can prolong the service life of the shaft seal.

Claims

1. A kind of double lip makes the skeleton shaft seal up, characterized by that: including exoskeleton (3), compress tightly in the mounting groove that exoskeleton (3) formed and be provided with inner frame (6), gasket (7), inner frame two (1), gasket two (5) and seal ring (2) that discharge in order, the surface of inner frame (6) supports and leans on the binding off portion internal surface that forms in exoskeleton (3) axial one end, seal ring (2) tight fit sets up between the axial skeleton baffle that forms of gasket two (5) and exoskeleton (3) axial other end, the radial inner of gasket one (7), gasket two (5) forms lip (4) towards the axial extension of buckling respectively.

2. The shaft seal of claim 1, wherein: the lip (4) is in a conical shape.

3. The shaft seal of claim 1, wherein: the inner diameters of the sealing washer (2), the inner framework II (1) and the inner framework I (6) are consistent.

4. The shaft seal of claim 1, wherein: the width of the inner framework II (1) is larger than that of the inner framework I (6).

5. The shaft seal of claim 1, wherein: the far end of the lip of the first gasket (7) extending along the axial direction is on the same horizontal plane with the outer surface of the first inner framework (6).

6. The shaft seal of claim 1, wherein: the vertex angle of the outer framework (3) is in circular arc transition.

7. The shaft seal of claim 1, wherein: the inner diameter of the axial framework baffle plate at one end, close to the sealing washer (2), of the outer framework (3) is smaller than that of the inner framework I (6).

8. The shaft seal of claim 1, wherein: the specifications of the first gasket (7) and the second gasket (5) are consistent.