CN214578834U

CN214578834U - Combined mechanical seal for high-speed transmission in complex external environment

Info

Publication number: CN214578834U
Application number: CN202023182870.5U
Authority: CN
Inventors: 杨龙; 王鑫; 王志强; 龚境一; 岳彦炯; 汤鱼
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-11-02
Anticipated expiration: 2030-12-25

Abstract

An object of the utility model is to provide a combination formula mechanical seal for high-speed transmission under complicated external environment, including sealed lid, the profile of tooth is sealed, the sealing ring support, float ring sealing ring, spiral seal, the profile of tooth is sealed, the sealing ring support, spiral seal is installed epaxial by outer and interior in proper order, float ring sealing ring installs on the sealing ring support, sealed lid is installed at the profile of tooth and is sealed, float ring sealing ring, spiral seal's outside, sets up back oil chamber in the sealed lid, sealed covering sets up back oil pipe, returns oil pipe intercommunication back oil chamber, it is outside that back oil chamber is located the profile of tooth and seals. The utility model discloses a four heavy combination mechanical seal forms of spiral seal, floating ring seal, profile of tooth are sealed and sealed lid fender oil structure have very high integrated nature, and the sealing reliability is high, and all be non-contact mechanical seal, and characteristics through different sealings are used, can realize high rotational speed, complicated service environment's reliable sealing, and the security is high.

Description

Combined mechanical seal for high-speed transmission in complex external environment

Technical Field

The utility model relates to a seal structure, specifically speaking are high-speed rotary mechanism's seal structure.

Background

With the gradual improvement of the technological level, power equipment develops towards the direction of integration, high speed, high reliability and high power density, and the development trend of the power transmission industry in the future is high rotating speed, high reliability, safety and environmental adaptability. The power transmission equipment realizes power transmission in a mechanical transmission mode, and in order to realize high rotating speed and high reliability of the power transmission equipment, an internal rotor, a meshing gear and a bearing must be forcibly lubricated, most of lubricating oil returns to a lubricating oil tank through gravity return oil, but part of lubricating oil flows out along an input shaft and an output shaft due to high-speed rotation inside the equipment and oil supply leakage of a shaft end supporting bearing, so that on one hand, the lubricating oil loss is caused in order to ensure that the lubricating oil inside the equipment does not leak, and on the other hand, in order to avoid safety accidents caused by the lubricating oil leakage in an external operation environment of the equipment, the shaft end of the power transmission equipment must be sealed through a reliable sealing device. Partial power equipment operation's external environment is abominable simultaneously, for example the marine facilities generally need operate under the great environment of ambient humidity, the steel factory is with the outside dust particulate matter of equipment more, for guaranteeing equipment operation safety, external environment steam also must be avoided, the dust particulate matter, this just needs the operation axle head to have reliable sealed, have to outer steam, good effect to the internal seal oil, simultaneously sealing member and operation axle must be non-contact sealed under the high rotational speed, in order to prevent that the operation from bumping and grinding and causing the potential safety hazard of equipment, this just provides very high requirement to the axle head seal under the high rotational speed.

Disclosure of Invention

An object of the utility model is to provide a lubricating oil, prevent that the lubricating oil from leaking in the internal shutoff equipment, the external shutoff aqueous vapor, dust particulate matter etc. get into the equipment inside one kind be used for high-speed driven combination formula mechanical seal under the complicated external environment.

The purpose of the utility model is realized like this:

the utility model relates to a high-speed driven combination formula mechanical seal under being used for complicated external environment, characterized by: the oil return device comprises a sealing cover, a tooth-shaped seal, a sealing ring support, a floating ring sealing ring and a spiral seal, wherein the tooth-shaped seal, the sealing ring support and the spiral seal are sequentially arranged on a shaft from outside to inside, the floating ring sealing ring is arranged on the sealing ring support, the sealing cover is arranged outside the tooth-shaped seal, the floating ring sealing ring and the spiral seal, an oil return cavity is arranged in the sealing cover, an oil return pipe is arranged on the sealing cover, the oil return pipe is communicated with the oil return cavity, and the oil return cavity is positioned outside the tooth-shaped seal.

The utility model discloses can also include:

1. still set up middle chamber, inner chamber in the sealed lid, the inner chamber is located the sealed outside of spiral, and middle chamber is located the sealed space of enclosing city jointly with sealed lid of spiral inboard.

2. The spiral seal rotates along with the shaft, internal lubricating oil is sucked, the internal lubricating oil is subjected to first heavy plugging, the seal ring support rotates along with the shaft, the floating ring seal ring performs radial and end face sealing in the rotating process, the lubricating oil is subjected to second heavy plugging, the tooth-shaped seal rotates along with the shaft, the tooth-shaped seal is combined with the seal cover for plugging, the lubricating oil subjected to second heavy plugging is blocked into the oil return cavity, and the leaked lubricating oil flows into the collecting box through the oil return pipe after the second heavy plugging.

The utility model has the advantages that: the utility model discloses a four heavy combination mechanical seal forms of spiral seal, floating ring seal, profile of tooth are sealed and sealed lid fender oil structure have very high integrated nature, and the sealing reliability is high, and all be non-contact mechanical seal, and characteristics through different sealings are used, can realize high rotational speed, complicated service environment's reliable sealing, and the security is high.

Drawings

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

Detailed Description

The invention will be described in more detail below by way of example with reference to the accompanying drawings:

combine fig. 1, the utility model discloses a sealed lid 1, the profile of tooth is sealed 2, sealing ring support 3, float ring sealing ring 4, spiral seal 5, return oil pipe 7 and constitute, and the profile of tooth is sealed 2, sealing ring support 3, spiral seal 5 and installs on axle 6, rotates along with the axle, and sealed lid 1 is installed on the box, and the transfixion returns oil pipe 7 and installs on sealed lid 1, and sealing ring 4 installs on sealing ring support 3. The internal lubricating oil of the equipment is sealed internally in a four-combined mechanical sealing mode of a spiral sealing structure, a floating ring sealing structure, a tooth-shaped sealing structure and an oil blocking structure of the sealing cover, so that the lubricating oil is prevented from leaking, and external plugging water vapor, dust particles and the like enter the equipment.

The spiral seal 5 is installed on the shaft 6 and rotates along with the shaft, the spiral seal rotating direction is selected according to the rotating direction of the shaft, lubricating oil in the equipment is sucked into the equipment, and the lubricating oil in the equipment is subjected to first reclosing. The floating ring sealing ring 4 is installed on the sealing ring support 3, the sealing ring support 3 is installed on the shaft 6 and rotates along with the shaft, the floating ring sealing ring is radially sealed on the end face in the rotating process, the lubricating oil in the equipment is secondarily sealed, and meanwhile, moisture, dust particles and the like in the external work environment are externally sealed and enter the equipment. The tooth-shaped seal 2 is arranged on the shaft 6, rotates along with the shaft, is combined with the seal cover 1 for plugging, internally blocks lubricating oil subjected to double sealing into the seal cover oil return cavity, and externally plugs moisture, dust particles and the like in an external working environment to enter equipment. Sealed lid 1 design keeps off oily structure, designs back oil chamber simultaneously, and back oil pipe 7 is installed on sealed lid 1, can pass through the pipeline with the inside a small amount of lubricating oil that leaks after dual blockking to and the outside through the sealed material such as a small amount of water that gets into after blockking of profile of tooth, prevent to cause the damage to equipment, avoid lubricating oil to leak and pollute operational environment.

Claims

1. A combined mechanical seal for high-speed transmission in a complex external environment is characterized in that: the oil return device comprises a sealing cover, a tooth-shaped seal, a sealing ring support, a floating ring sealing ring and a spiral seal, wherein the tooth-shaped seal, the sealing ring support and the spiral seal are sequentially arranged on a shaft from outside to inside, the floating ring sealing ring is arranged on the sealing ring support, the sealing cover is arranged outside the tooth-shaped seal, the floating ring sealing ring and the spiral seal, an oil return cavity is arranged in the sealing cover, an oil return pipe is arranged on the sealing cover, the oil return pipe is communicated with the oil return cavity, and the oil return cavity is positioned outside the tooth-shaped seal.

2. The modular mechanical seal of claim 1 for high speed drive in complex external environments, wherein: still set up middle chamber, inner chamber in the sealed lid, the inner chamber is located the sealed outside of spiral, and middle chamber is located the sealed space of enclosing city jointly with sealed lid of spiral inboard.

3. The combined mechanical seal for high speed transmission in complex external environment of claim 2, wherein: the spiral seal rotates along with the shaft, internal lubricating oil is sucked, the internal lubricating oil is subjected to first heavy plugging, the seal ring support rotates along with the shaft, the floating ring seal ring performs radial and end face sealing in the rotating process, the lubricating oil is subjected to second heavy plugging, the tooth-shaped seal rotates along with the shaft, the tooth-shaped seal is combined with the seal cover for plugging, the lubricating oil subjected to second heavy plugging is blocked into the oil return cavity, and the leaked lubricating oil flows into the collecting box through the oil return pipe after the second heavy plugging.