SPROCKET OF NON-METALLIC SLUDGE COLLECTOR

SAV Hybrid Sprockets

I. SAV Hybrid Sprockets from Hitachi, Japan

Chain Flight's **Sprocket** is generally manufactured with teeth and bosses integrated into one piece.

However, when using stainless steel chains or metal chains in the past, to reduce sprocket wear, Hybrid type sprocket that combines two or more materials so that only the teeth can be replaced separately.This was developed.

In MAXCO Chain’s catalog,

**It refers to “SAV715 Hybrid Replaceable Tooth Sprocket”**,

**“Individual replaceable teeth”**

**It is stated that “hardened stainless steel (e.g. 410 stainless steel) teeth”** are applied.

International Patent (US20110136606A1 – Chain Sprocket Mechanism – HITACHI)

II. Replicas of SAV Hybrid Sprockets

Afterwards, this technology DEWA, Finlandby Non-metallic chain flight systembegan to be applied.

However, Hitachi's circular structure

• The teeth are hardened metal,

• **Sprocket boss is also made of steel**

• It was a structure that could sufficiently withstand the load and contact pressure of the chain.

On the other hand, the tooth shape Changed to non-metallic material,

Due to repetitive **buckling load**

From tooth profile Cracks and damage occur repeatedlyA problem appeared.

Products with the same structure It is sold in Korea by domestic company T in the same form as Finnish DEWA products.

III. The reason for the development of SAV Hybrid Sprockets is...

The fundamental reasons for the development of these products are as follows.

the load on the chain Wearing the sprocket by digging into the teethorder,

Teeth type Wears in the form of an undercutAs it becomes

chain Breakage phenomenon occurs repeatedly.Because it does.

This is a phenomenon that occurs repeatedly in a **Single Life**,

To solve this problem in Japan, Another type of chain sprocket systemThis was developed.

Japan uses **Acetal** as a chain material.

This is This is because environmental regulations on chain materials have been applied due to the strengthening of sludge recycling regulations.It is.

But The elongation of high-stiffness POM (Acetal) is approximately 15-30%.By,

chain Stretching (elongation) occurs very significantlyThere is a problem with

to replace this Patent concentration on new chain and sprocket technologiesThis appears.

IV. Notch Chain and sprocket device

Another type of technology developed in Japan is the **“Notch chain and sprocket device”**.

This technology is used on existing chains Form a notchAnd

The head sprocket has pins and rollers that make direct contact with the notches in the chain.So

chain Contact pins and rollers first, not teethIt is a structure that allows you to do so.

This method Significantly reduces tooth wearIt has a purpose.

However, due to compatibility issues with ASME products, which are international standards, Applies only within Japanbecome galapagus technologyIt is.

​

V. A fundamental solution to notch chain and sprocket devices

This problem can be solved by applying the following two techniques: It is fundamentally possible to solve it.

1. High-rigidity chain material that significantly reduces chain tension (stretching)

2. ASME standard sprocket with SAVE RIM structure applied to the sprocket

​

ASME sprocket with SAVE RIM structure

Japan or Hitachi Even if technology with complex and anomalous structures is not applied,,

Maintains like-new teeth even after operating for more than 12 years at the Busan Gangbyeon Sewage Treatment PlantAnd

Demonstrative case in which no abnormal wear occurred at allexists.

That is, The SAVE RIM structure itself can fundamentally solve all existing wear and tear problems.It has been proven that

​

The application and development of technology requires an accurate understanding of the characteristics and principles of the product, so that long-term and continuous product development is possible.

"Based on scientific thinking,

Safe for public health,

Through sustainable technology development,

Customers satisfy their needs,

Aiming at customer satisfaction as the highest goal,

This is Rincon Technology."