An adjustable eccentric rubber seal device

Abstract

The application belongs to the technical field of rotary shaft sealing, and particularly relates to a rubber sealing device with adjustable eccentricity, which comprises a third mounting hole formed in a mounting shell, the large end of the third mounting hole being away from the inner cavity of the mounting shell, an outer diameter component coaxially mounted in the large end of the third mounting hole, the outer diameter component being provided with a first mounting hole, an inner hole component coaxially mounted in the first mounting hole, the inner hole component being provided with a second mounting hole, a sealing lip being arranged at the inner edge of the second mounting hole, and a rotary shaft coaxially mounted in the second mounting hole and in interference fit with the sealing lip, the end surface of the outer diameter component being provided with a first scale, and the end surface of the inner hole component being provided with a second scale. By arranging the eccentric outer diameter component and inner hole component, the eccentricity of the application can be adjusted by rotating the direction of the inner hole component, the eccentricity of the rotary shaft and the third mounting hole can be adapted, and thus the sealing effect of the sealing device is improved and the service life of the sealing device is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rotary shaft sealing, and particularly relates to a rubber sealing device with adjustable eccentricity. BACKGROUND

[0002] Rotary shaft sealing leakage problems occur in the market from time to time, one of the reasons is that the installation eccentricity of the equipment is too large to cause leakage. Some large equipment is difficult to guarantee the machining precision, and the eccentricity is usually large during assembly, and the deformation of the bearing and the shell caused by the equipment operation increases the installation eccentricity of the rubber sealing. The rubber sealing on the market usually increases the interference amount of the lip to meet the installation eccentricity of the rotary shaft, but the increase of the interference amount will cause the increase of the lip holding force, thereby causing the increase of the lip contact stress and accelerating the lip wear, and shortening the service life of the rubber sealing. SUMMARY

[0003] The application aims to provide a rubber sealing device with adjustable eccentricity to solve the above problems.

[0004] To achieve the above-mentioned purpose, the application provides the following scheme:

[0005] A rubber sealing device with adjustable eccentricity comprises:

[0006] A mounting shell, a third mounting hole is formed in the mounting shell, and a large end of the third mounting hole is away from an inner cavity of the mounting shell;

[0007] An outer diameter component is coaxially mounted in the large end of the third mounting hole, a first mounting hole is formed in the outer diameter component, and the first mounting hole is eccentrically arranged with the outer diameter component;

[0008] An inner hole component is coaxially mounted in the first mounting hole, a second mounting hole is formed in the inner hole component, the second mounting hole is eccentrically arranged with the inner hole component, and a sealing lip is arranged at an inner edge of the second mounting hole;

[0009] A rotary shaft is coaxially mounted in the second mounting hole and is in interference fit with the sealing lip;

[0010] A first scale is formed on an exposed end face of the outer diameter component, a second scale is formed on an exposed end face of the inner hole component, and the eccentricity of the rotary shaft is adjusted by adjusting the relative positions of the first scale and the second scale.

[0011] Preferably, the outer diameter component comprises an outer ring rubber, the outer ring rubber is mounted in the large end of the third mounting hole, the outer ring rubber is in interference fit with the large end of the third mounting hole, and the first mounting hole is formed in the outer ring rubber and is eccentrically arranged with the outer ring rubber.

[0012] Preferably, the outer ring rubber is internally circumferentially provided with an outer ring metal skeleton.

[0013] Preferably, the inner hole component comprises an inner ring rubber, the inner ring rubber is mounted in the first mounting hole, the inner ring rubber is in interference fit with the first mounting hole, the second mounting hole is provided on the inner ring rubber and is eccentric to the inner ring rubber, the sealing lip is fixed at the inner edge of the second mounting hole and faces the inner cavity of the mounting shell, the rotating shaft is arranged in the sealing lip and is in interference fit with the sealing lip.

[0014] Preferably, the sealing lip comprises a sealing lip which is circumferentially fixed at the inner edge of the second mounting hole, the rotating shaft is arranged in the sealing lip and is in interference fit with the sealing lip.

[0015] Preferably, the inner ring rubber is internally circumferentially provided with an inner ring metal skeleton.

[0016] Preferably, the second mounting hole is circumferentially fixed with a dust lip which faces the outside of the mounting shell, the rotating shaft is arranged in the dust lip and is in interference fit with the dust lip.

[0017] Preferably, the outer edge of the sealing lip is circumferentially provided with a spring groove, and the spring groove is circumferentially provided with a spring.

[0018] Compared with the prior art, the present application has the following advantages and technical effects:

[0019] In use, first fix the dial gauge on the rotating shaft, the measuring end of the dial gauge is in sliding contact with the inner wall of the large end of the third mounting hole, rotate the rotating shaft and read the dial gauge, obtain the maximum and minimum values of the dial gauge reading, the difference between the maximum and minimum values is twice the eccentricity, thus the eccentricity of the rotating shaft is obtained, and the position of the maximum value of the dial gauge reading is marked on the third mounting hole;

[0020] Rotate the inner hole component, align the value equal to the eccentricity on the inner hole component and the value equal to the eccentricity on the outer diameter component, at this time the eccentricities of the inner hole component and the outer diameter component are the eccentricity of the rotating shaft, install the device of the present application in the large end of the third mounting hole, align the scale line on the device of the present application with the mark on the third mounting hole, at this time the eccentricity of the rotating shaft and the second mounting hole of the inner hole component is zero.

[0021] The present application adjusts the eccentricity of the present application by rotating the direction of the inner hole component, adapts the eccentricity of the rotating shaft and the third mounting hole, thus improves the sealing effect of the sealing device and prolongs the service life of the sealing device. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 It is an installation schematic diagram of the present application.

[0024] Figure 2 It is a front view of the present application.

[0025] Figure 3 It is a structural schematic diagram of the embodiment of the present application.

[0026] Figure 4 It is a structural schematic diagram of the second embodiment of the present application.

[0027] Figure 5 It is a structural schematic diagram of the third embodiment of the present application.

[0028] Figure 6 It is a structural schematic diagram of the fourth embodiment of the present application.

[0029] Wherein, 1, installation shell; 2, rotating shaft; 3, outer ring metal framework; 4, outer ring rubber; 5, inner ring metal framework; 6, inner ring rubber; 7, spring; 8, sealing lip; 9, dust lip. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Embodiment one

[0033] With reference to Figures 1 to 3 The present embodiment discloses an adjustable eccentric rubber sealing device, comprising:

[0034] The installation shell 1 is provided with a third mounting hole, and the large end of the third mounting hole is away from the inner cavity of the installation shell 1.

[0035] The outer diameter part is coaxially installed in the large end of the third mounting hole, and a first mounting hole is formed in the outer diameter part and is eccentric to the outer diameter part;

[0036] The inner hole part is coaxially installed in the first mounting hole, and a second mounting hole is formed in the inner hole part and is eccentric to the inner hole part, and a sealing lip is arranged at the inner edge of the second mounting hole;

[0037] The rotating shaft 2 is coaxially installed in the second mounting hole and is in interference fit with the sealing lip;

[0038] A first scale is formed on the exposed end face of the outer diameter part, a second scale is formed on the exposed end face of the inner hole part, and the eccentricity of the rotating shaft 2 is adjusted by adjusting the relative positions of the first scale and the second scale.

[0039] In use, first fix the dial gauge on the rotating shaft 2, the measuring end of the dial gauge is in sliding contact with the inner wall of the large end of the third mounting hole, rotate the rotating shaft 2 and read the dial gauge, get the maximum and minimum values of the dial gauge reading, the difference between the maximum and minimum values of the dial gauge reading is twice the eccentricity, so as to obtain the eccentricity of the rotating shaft, and mark the position of the maximum value of the dial gauge reading on the third mounting hole;

[0040] Rotate the inner hole part, align the value equal to the eccentricity on the inner hole part with the value equal to the eccentricity on the outer diameter part, at this time the eccentricity of the inner hole part and the outer diameter part is the eccentricity of the rotating shaft 2, install the device in the large end of the third mounting hole, align the scale line on the device with the mark on the third mounting hole, at this time the eccentricity of the rotating shaft 2 and the second mounting hole of the inner hole part is zero.

[0041] For example, the difference between the maximum and minimum values of the dial gauge reading is 1.6mm, the eccentricity of the rotating shaft 2 is 0.8mm, and the position of the maximum reading is marked on the third mounting hole; rotate the inner hole part, align the eccentric scale value 0.8 on the surface of the inner hole part with the corresponding scale value 0.8 of the outer diameter part, at this time the eccentricity of the inner hole and the outer diameter of the product is 0.8mm. Install the product in the direction of the 0.8 scale mark of the mounting hole, so that the inner hole of the sealing device and the rotating shaft can keep 0 eccentricity, thereby improving the sealing performance and service life.

[0042] The device adjusts the eccentricity of the device by rotating the direction of the inner hole part, adapts to the eccentricity of the rotating shaft and the third mounting hole, thereby improving the sealing effect of the sealing device and prolonging the service life of the sealing device.

[0043] Further optimization scheme, the outer diameter part includes an outer ring rubber 4, the outer ring rubber 4 is installed in the large end of the third mounting hole, the outer ring rubber 4 is in interference fit with the large end of the third mounting hole, and the first mounting hole is arranged on the outer ring rubber 4 and is eccentric to the outer ring rubber 4.

[0044] The outer ring rubber 4 is in interference fit with the large end of the third mounting hole, so that the sealing performance of the device is improved.

[0045] Further optimization scheme, the outer ring rubber 4 is internally circumferentially provided with an outer ring metal skeleton 3.

[0046] In this way, the structural strength of the outer ring rubber 4 is improved.

[0047] Further optimization scheme, the inner hole part includes an inner ring rubber 6, the inner ring rubber 6 is installed in the first mounting hole, the inner ring rubber 6 is in interference fit with the first mounting hole, the second mounting hole is arranged on the inner ring rubber 6 and is eccentric to the inner ring rubber 6, the sealing lip is fixedly connected at the inner edge of the second mounting hole and faces the inner cavity of the mounting shell 1, the rotating shaft 2 is arranged in the sealing lip and is in interference fit with the sealing lip.

[0048] Further optimization scheme, the sealing lip includes a sealing lip 8 circumferentially fixedly connected at the inner edge of the second mounting hole, and the rotating shaft 2 is arranged in the sealing lip 8 and is in interference fit with the sealing lip 8. The rotating shaft 2 is in interference fit with the sealing lip 8, so that the sealing performance of the sealing lip 8 is improved.

[0049] Further optimization scheme, the inner ring rubber 6 is internally circumferentially provided with an inner ring metal skeleton 5.

[0050] In this way, the structural strength of the inner ring rubber 6 is improved.

[0051] Example two

[0052] Reference Figure 4 The difference between the embodiment and the embodiment one is that the second mounting hole is circumferentially fixedly connected with a dustproof lip 9 in the embodiment, the dustproof lip 9 faces the outer side of the mounting shell 1, the rotating shaft 2 is arranged in the dustproof lip 9 and is in interference fit with the dustproof lip 9. In this way, dust is prevented from entering between the rotating shaft 2 and the inner ring rubber 6.

[0053] Example three

[0054] Reference Figure 5 The difference between the embodiment and the embodiment one is that the outer edge of the sealing lip 8 is circumferentially provided with a spring groove in the embodiment, and the spring groove is circumferentially provided with a spring 7.

[0055] In this way, the sealing performance between the sealing lip 8 and the rotating shaft 2 is improved.

[0056] Example four

[0057] Referring to Figure 6 Different from the embodiment one, the embodiment two and the embodiment three, the embodiment sets the dustproof lip 9 and the spring 7.

[0058] In the description of the present application, it needs to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0059] The above-described embodiments are only to describe the preferred modes of the present application, and not to limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. An adjustable eccentric rubber seal device, characterized by, The utility model relates to a kind of eccentricity adjustable rotary shafts, including: Mounting shell (1), third mounting hole is opened on the mounting shell (1), the large end of the third mounting hole is away from the inner cavity of the mounting shell (1); Outer diameter component, coaxially installed in the large end of the third mounting hole, first mounting hole is opened on the outer diameter component, the first mounting hole is eccentric with the outer diameter component; Inner hole component, coaxially installed in the first mounting hole, second mounting hole is opened on the inner hole component, the second mounting hole is eccentric with the inner hole component, sealing lip is provided at the inner edge of the second mounting hole; Rotary shaft (2), coaxially installed in the second mounting hole and with the sealing lip interference fit; The end surface of the outer diameter component is opened with first scale, the end surface of the inner hole component is opened with second scale, the eccentricity of the rotary shaft (2) is adjusted by adjusting the relative position of the first scale and the second scale; The outer diameter component includes outer ring rubber (4), the outer ring rubber (4) is installed in the large end of the third mounting hole, the outer ring rubber (4) is interference fit with the large end of the third mounting hole, the first mounting hole is opened on the outer ring rubber (4) and is eccentric with the outer ring rubber (4); The inner hole component includes inner ring rubber (6), the inner ring rubber (6) is installed in the first mounting hole, the inner ring rubber (6) is interference fit with the first mounting hole, the second mounting hole is opened on the inner ring rubber (6) and is eccentric with the inner ring rubber (6), the sealing lip is fixed at the inner edge of the second mounting hole and towards the inner cavity of the mounting shell (1), the rotary shaft (2) is threaded in the sealing lip, and the rotary shaft (2) is interference fit with the sealing lip.

2. An adjustable eccentric rubber seal device as claimed in claim 1, wherein: The inner circumference of the outer ring rubber (4) is provided with an outer ring metal skeleton (3).

3. An adjustable eccentric rubber seal device as claimed in claim 1, wherein: The sealing lip includes a sealing lip (8) fixed circumferentially on the inner edge of the second mounting hole, and the rotary shaft (2) is threaded in the sealing lip (8) and interference fit with the sealing lip (8).

4. An adjustable eccentric rubber seal device as defined in claim 1, wherein: The inner circumference of the inner ring rubber (6) is provided with an inner ring metal skeleton (5).

5. An adjustable eccentric rubber seal device as defined in claim 1, wherein: The second mounting hole is circumferentially fixed with a dust lip (9), the dust lip (9) faces the outside of the mounting shell (1), the rotary shaft (2) is threaded in the dust lip (9), and the rotary shaft (2) is interference fit with the dust lip (9).

6. An adjustable eccentric rubber seal device as defined in claim 3, wherein: The outer edge of the sealing lip (8) is circumferentially provided with a spring groove, and the spring groove is circumferentially provided with a spring (7).

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