CN-122014855-A - Novel shaft seal

Abstract

The invention discloses a novel shaft seal, which belongs to the technical field of shaft seals, and particularly relates to a novel shaft seal, comprising a main framework, wherein an auxiliary framework is arranged on the inner wall of the main framework, a separation frame is arranged on the auxiliary framework, a first sealing lip is arranged between the auxiliary framework and the separation frame, a spring is arranged in an inner cavity of the first sealing lip, a second sealing lip is arranged between the separation frame and the main framework, and a sealing gasket is arranged between the second sealing lip and the main framework. The shaft seal realizes multiple sealing protection by optimizing the integral structural design and adopting a composite sealing structure of double sealing lips matched with spring pretension, integrated framework support and auxiliary sealing gasket, improves sealing reliability, optimizes the structural form of the sealing lips and the framework, ensures the fitting precision and stability of the sealing lips, increases the stability of the sealing redundancy of the shaft seal, reduces friction and abrasion, prevents the high-temperature setting of the shaft seal, influences the sealing performance of the shaft seal, prolongs the service life, and is suitable for shaft end sealing scenes under various complex working conditions.

Inventors

• JING YONGWEI

Assignees

• 邢台宁硕机械配件有限公司

Dates

Publication Date

20260512

Application Date

20260212

Claims (6)

1. 1. A novel shaft seal is characterized by comprising a main framework (100); Be provided with auxiliary skeleton (110) on the inner wall of main skeleton (100), install on auxiliary skeleton (110) and separate frame (120), install first seal lip (130) between auxiliary skeleton (110) and separate frame (120), spring (150) are installed to first seal lip (130) inner chamber, install second seal lip (140) between separate frame (120) and main skeleton (100), install sealed pad (160) between second seal lip (140) and main skeleton (100).
2. 2. The novel shaft seal according to claim 1, wherein the cross sections of the main framework (100) and the auxiliary framework (110) are L-shaped structures, and the auxiliary framework (110) and the main framework (100) are integrated.
3. 3. The novel shaft seal of claim 1 wherein said spacer (120) is of annular configuration and said first and second sealing lips (130, 140) are positioned at the bottom and top of the spacer (120), respectively.
4. 4. The novel shaft seal of claim 1, wherein a hollow cavity is formed in the middle of the first sealing lip (130), and the spring (150) is located in the hollow cavity.
5. 5. The novel shaft seal according to claim 1, wherein the sealing gasket (160) is of an annular structure, and the sealing gasket (160) is fixedly connected with the second sealing lip (140) and the main framework (100).
6. 6. The novel shaft seal according to claim 1, wherein the inner sides of the first sealing lip (130) and the second sealing lip (140) are bent downwards, and the bent parts are arc-shaped.

Description

Novel shaft seal Technical Field The invention relates to the technical field of shaft seals, in particular to a novel shaft seal. Background The traditional skeleton oil seal can only work under the working condition of lubrication, and is easy to wear and age when no lubrication or a small amount of lubrication is encountered. The traditional tetrafluoro shaft seal is easy to be unstable in redundancy caused by temperature difference change, and the seal is easy to deform, so that medium leakage is caused, and the normal operation of equipment is influenced. Secondly, traditional oil blanket structural design is unreasonable, and lip and axle contact surface are little, and the requirement is high for the axle runout, and under equipment vibrations for a long time, high temperature and alternating load effect, easily lead to sealing lip pretension uneven distribution, sealing face laminating precision decline, and the axiality deviation easily appears, and then aggravates sealing lip's wearing and tearing, shortens oil blanket life. Aiming at the defects existing in the prior art, the development of a novel shaft seal with reasonable structural design, reliable sealing performance, strong bearing capacity and long service life is urgently needed to solve the problems of unstable sealing redundancy, lubrication-free and easy aging, quick abrasion of a sealing lip, easy leakage and the like of the conventional shaft seal and meet the sealing requirements of various mechanical equipment under complex working conditions. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The present invention has been made in view of the problems existing in the existing shaft seals. Therefore, the invention aims to overcome the defects of poor sealing performance, easy abrasion of a sealing lip, short service life and the like of the shaft seal in the prior art and provides a novel shaft seal. The shaft seal realizes multiple sealing protection by optimizing the integral structural design and adopting a composite sealing structure of double sealing lips matched with spring pretension, integrated framework support and auxiliary sealing gasket, improves sealing reliability, optimizes the structural form of the sealing lips and the framework, ensures the fitting precision and stability of the sealing lips, increases the stability of the sealing redundancy of the shaft seal, reduces friction and abrasion, prevents the high-temperature setting of the shaft seal, influences the sealing performance of the shaft seal, prolongs the service life, and is suitable for shaft end sealing scenes under various complex working conditions. In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided: A novel shaft seal, which comprises a main framework; The inner wall of the main framework is provided with an auxiliary framework, the auxiliary framework is provided with a separation frame, a first sealing lip is arranged between the auxiliary framework and the separation frame, a spring is arranged in an inner cavity of the first sealing lip, a second sealing lip is arranged between the separation frame and the main framework, and a sealing gasket is arranged between the second sealing lip and the main framework. As a preferable scheme of the novel shaft seal, the cross sections of the main framework and the auxiliary framework are L-shaped structures, and the auxiliary framework and the main framework are integrated. As a preferable scheme of the novel shaft seal, the partition frame is of an annular structure, and the first sealing lip and the second sealing lip are respectively positioned at the bottom and the top of the partition frame. As a preferable scheme of the novel shaft seal, a hollow cavity is formed in the middle of the first sealing lip, and the spring is located in the hollow cavity. As a preferable scheme of the novel shaft seal, the sealing gasket is of an annular structure and is fixedly connected with the second sealing lip and the main framework. As a preferable scheme of the novel shaft seal, the inner sides of the first sealing lip and the second sealing lip are bent downwards, and the bent parts are arc-shaped. Compared with the prior art, the invention has the beneficial effects that: 1. Compared with the traditional rubber shaft seal, the sealing performance is excellent, a double sealing barrier is formed by adopting a composite sealing structure of the first sealing lip, the second sealing lip and the sealing gasket, and the sealing reliability is greatly improved by matching with the pre-tightening force action of the spring.