Mechanical sealing device for pump

A mechanical seal device and a technology for pumps, which are applied to the sealing of engines, mechanical equipment, and parts of pumping devices for elastic fluids, etc., can solve the problems of inconvenient parts replacement and maintenance, increased production and production costs, It is difficult to identify and judge problems in maintenance, so as to achieve the effects of easy replacement and maintenance, low production and assembly costs, and simple structure

Inactive Publication Date: 2015-10-21
NINGBO DONGLIAN MECHANICAL SEAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of mechanical seals for pumps, and the models are different, and its maintenance is also difficult to distinguish and judge.
[0003] Traditional mechanical seals for pumps, such as the invention with the authorized announcement number CN 2014696339 U, disclose a light-duty cartridge mechanical seal for pumps, including a seal sleeve directly sleeved on the bearing, and the seal sleeve is provided with Moving ring grinding block and static ring grinding block, the front end of the moving ring grinding block is in contact with the rear end of the static ring grinding block, the rear end of the moving ring grinding block is connected with a moving ring bellows, and a moving ring skeleton is arranged outside the moving ring bellows , the moving ring frame is all provided with a spring pressing device, the front end of the static ring grinding block is provided with a static ring rubber frame, and the static ring rubber frame is arranged on the sealing bushing. This mechanical seal device has the following problems: 1. Due to the harsh working environment and the defects of the machine itself, mechanical seals for pumps have large parts loss and are easily damaged. However, this kind of mechanical seal has many parts, complicated structure, and troublesome disassembly and assembly. It is inconvenient to replace and maintain; 2. Due to the complex structure, the precision requirements of each component of the mechanical seal are high during production and installation. In order to reduce the occurrence of unqualified products, higher precision processing equipment is required, resulting in processing costs 3. Due to the large number of parts, its production and production costs are greatly increased, and the replacement and maintenance of parts also increase its subsequent costs, and its production efficiency is also low

Method used

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  • Mechanical sealing device for pump
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] When the solid particle content of the medium is less than 5wt%, the moving ring is made of hard material, and the static ring is made of soft material.

[0048] The preparation process of the moving ring is as follows: Weigh 100 parts of silicon carbide powder with a particle size of 0.1-0.3 μm in parts by weight, 8 parts of carbon fiber and 12 parts of silicon carbide fiber are mixed to form reinforcing fibers, and sintering aids composed of B and C 3 parts of agent, wherein B accounts for 10%. The silicon carbide powder is first chemically purified to remove silicon and silicon oxide. At the same time, the reinforcing fibers are subjected to surface oxidation treatment. Then the raw materials are mixed evenly, and other processing aids can be added according to the prior art during mixing to obtain slurry. Then the slurry is spray-dried to form 80-100 mesh particles, and then the particles are pressed into a green body, and finally high-temperature sintering is car...

Embodiment 2

[0051] When the solid particle content of the medium is less than 5%, the moving ring is made of hard material, and the static ring is made of soft material.

[0052] The preparation process of the moving ring is as follows: Weigh 100 parts of silicon carbide powder with a particle size of 0.3-0.5 μm in parts by weight, 10 parts of carbon fiber and 15 parts of silicon carbide fiber are mixed to form the reinforcing fiber, and the sintering aid composed of B and C 4 parts of agent, wherein B accounts for 10%. The silicon carbide powder is first chemically purified to remove silicon and silicon oxide. At the same time, the reinforcing fibers are subjected to surface oxidation treatment. Then the raw materials are mixed evenly, and other processing aids can be added according to the prior art during mixing to obtain slurry. Then the slurry is spray-dried to form 80-100 mesh particles, and then the particles are pressed into a green body, and finally high-temperature sintering i...

Embodiment 3

[0055] When the solid particle content of the medium is less than 5%, the moving ring is made of hard material, and the static ring is made of soft material.

[0056] The preparation process of the moving ring is as follows: Weigh 100 parts of silicon carbide powder with a particle size of 0.5-0.8 μm in parts by weight, 11.2 parts of carbon fiber and 16.8 parts of reinforcing fiber made of silicon carbide fiber, sintering aid composed of B and C 3.5 parts of agent, wherein B accounts for 10%. The silicon carbide powder is first chemically purified to remove silicon and silicon oxide. At the same time, the reinforcing fibers are subjected to surface oxidation treatment. Then the raw materials are mixed evenly, and other processing aids can be added according to the prior art during mixing to obtain slurry. Then the slurry is spray-dried to form 80-100 mesh particles, and then the particles are pressed into a green body, and finally high-temperature sintering is carried out at...

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PUM

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Abstract

The invention provides a mechanical sealing device for a pump. The mechanical sealing device comprises a rotary shaft, wherein a static ring and a dynamic ring are arranged on the rotary shaft; one end of the dynamic ring is resisted against the static ring; a dynamic ring base and a transmission ring are further arranged on the rotary shaft; the transmission ring is fixedly connected with the rotary shaft; the front end of the dynamic ring base is connected with the dynamic ring; a first ring-shaped pit is formed in the rear end of the dynamic ring base; a spring is arranged on the outer surface of the rotary shaft is a surrounding mode; the spring is positioned in the first ring-shaped pit; one end of the spring is resisted against the first ring-shaped pit; the other end of the spring is resisted against the transmission ring; a tightening plate is axially arranged at one side of the transmission ring; the tightening plate is resisted against the dynamic ring base; a tightening bolt is arranged on the tightening plate; and the tightening bolt penetrates through the tightening plate and the transmission ring and then is resisted against the rotary shaft. The mechanical sealing device is optimized in structure, relatively convenient to dismount due to reduction of parts, and low in processing precision requirement. Moreover, the dynamic ring is made of a hard material and the static ring is made of a hard or soft material, so that fitting-up effect between the dynamic ring and the static ring is improved, the sealing reliability is guaranteed, and the service lives of the dynamic ring and the static ring are prolonged.

Description

technical field [0001] The invention belongs to the technical field of sealing systems, and relates to a mechanical sealing device for pumps. Background technique [0002] Mechanical seals for pumps are one of the basic components of machinery with precision and complex structures, and are key components of pump machinery. Its sealing performance and service life depend on many factors, such as type selection, machine precision, correct installation and use, etc. There are many kinds of mechanical seals for pumps with different models, and its maintenance is also difficult to distinguish and judge. [0003] Traditional mechanical seals for pumps, such as the invention with the authorized announcement number CN 2014696339 U, disclose a light-duty cartridge mechanical seal for pumps, including a seal sleeve directly sleeved on the bearing, and the seal sleeve is provided with Moving ring grinding block and static ring grinding block, the front end of the moving ring grinding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/34F04B53/00
CPCF16J15/3452F04B53/00
Inventor 李友宝励永平
Owner NINGBO DONGLIAN MECHANICAL SEAL
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