A new type of seal device for a slurry pump

By using silicon carbide material and a specially designed media-side thrust ring, the problem of unstable lifespan of slurry pump sealing devices under strong corrosion and abrasion conditions has been solved, achieving stability and reliability of the sealing device, adapting to operation under different water pressure conditions, and supporting PLAN54/PLAN55 auxiliary systems.

CN224352134UActive Publication Date: 2026-06-12CHENGDU XINDE SEAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU XINDE SEAL CO LTD
Filing Date
2025-06-03
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing slurry pump sealing devices are prone to wear and corrosion under strong corrosive and abrasive conditions, resulting in unstable seal life. In particular, the sealing end face is prone to opening when starting under low water pressure conditions, leading to unstable equipment operation.

⚗Method used

The medium contact part of the sealing device is made of silicon carbide material, and a specially designed medium-side push ring is used to achieve positive balance and reverse unbalance functions, increasing the sealing closing force. Combined with the compact design of the atmospheric side sealing structure, multiple sealing rings are used to reduce water pressure requirements.

🎯Benefits of technology

It extends the life of sealing components, reduces the frequency of wear and corrosion, improves the stability and reliability of the seal under complex working conditions, adapts to different water pressure conditions, supports PLAN54/PLAN55 auxiliary systems, and has a compact structure for easy installation and heat exchange.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a novel slurry pump sealing device relates to mechanical seal technical field, including rotating part and stationary part: rotating part is by medium side dynamic ring, shaft sleeve and pump shaft, and medium side dynamic ring is through the pin peg and is equipped with in the outer of shaft sleeve, and shaft sleeve is pressed in the impeller end face through the hug ring, stationary part contains medium side static ring, medium side push ring and atmospheric side gland, and medium side static ring is connected with push ring through the pin peg, and push ring is axially connected with atmospheric side gland through transmission pin, and atmospheric side gland is fixed in the pump cover. The spring is arranged between atmospheric side gland and medium side push ring, and medium side dynamic ring and static ring are pushed and abut tightly and seal. Medium side dynamic ring diameter D1 is less than medium side push ring diameter D4, and greater than medium side static ring diameter D3, forms positive balance - reverse unbalanced structure, and increases the closed force, and atmospheric side seal is established between stationary part and shaft sleeve, and contains atmospheric side dynamic ring seal that rotates with shaft sleeve, atmospheric side static ring seal that is fixed in atmospheric side gland, compact structure, saves the space.
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