Views: 0 Author: Site Editor Publish Time: 2026-07-21 Origin: Site
Embedded Rotary Joint for Continuous Casting Machines Product Selection Guide
Product Overview
The Embedded Rotary Joint is a core cooling component specifically designed for modern steel continuous casting equipment. It is also suitable for other rotating machinery with limited installation space. Most of the joint body is embedded inside the roller, with only the external pipe connection elbow exposed. This design significantly saves space and protects the joint from external mechanical damage.
This product is widely used in the roller cooling systems of continuous casting machines. It primarily solves the challenge of delivering cooling water or coolant to low rotating rollers under harsh conditions including high temperature, heavy dust, and vibration.
Core Structure and Advantages
1. Space-Saving Embedded Design
Over 70% of the joint body is embedded within the roller, substantially reducing the spacing between rollers and optimizing fluid pipeline layout. This design not only improves aesthetics but also enables more compact equipment configurations.
2. Stable and Reliable Balanced Mechanical Seal
The joint employs a balanced mechanical seal with stable sealing face pressure, effectively resisting the effects of medium pressure and vibration. The sealing pair is typically made of high-strength materials such as silicon carbide, tungsten carbide, and impregnated graphite, which can tolerate industrial circulating water containing minor impurities, thereby extending service life.
3. Flexible Installation and Maintenance
External fixation is typically achieved using a half-flange design, allowing for convenient disassembly and maintenance without removing the entire roller. This structure also automatically compensates for axial displacement (typically up to 10 mm) and minor angular deviations (≤0.1°) caused by thermal expansion and contraction of the roller.
4. Reliable Leakage Prevention Design
A drain hole return structure channels minor seal leakage back into the system, preventing coolant from escaping and contaminating the working environment.
Key Selection Parameters
The following core technical parameters serve as a reference for product selection based on industry standards:
Parameter Category | Typical Range | Remarks |
|---|---|---|
Applicable Media | Industrial circulating water, coolants (may contain minor impurities) | Customizable for water-glycol and other media upon request |
Working Pressure | 1.2 – 1.5 MPa | High-pressure versions available up to 2.0 MPa for special applications |
Maximum Temperature | ≤120°C | High-temperature models available with heat resistance up to 180°C or even 230°C using special materials |
Maximum Rotational Speed | ≤60 RPM | Designed for low-speed, heavy-load conditions typical of continuous casting rollers |
Bore Diameter | DN15 – DN32 (G1/2” – G1 1/4”) | Customizable up to DN50 depending on roller diameter and cooling flow requirements |
Body Material | Brass, stainless steel, carbon steel | Some components are made of stainless steel; brass offers excellent thermal conductivity |
Product Series Classification
Based on function and flow path design, embedded rotary joints are generally categorized into the following types:
Single-Flow Type (e.g., MD Series, YHN-S Series) – Single-direction media flow with a relatively simple structure, suitable for basic cooling requirements.
Dual-Flow Type (e.g., MS Series, YHMS Series, BDTS Series) – Features a dual-passage design with a fixed inner pipe and rotating outer pipe, enabling forced circulation of coolant for higher cooling efficiency. This is the current mainstream configuration.
High-Pressure / Heavy-Duty Type (e.g., YHN-D Series) – Designed with reinforced structures for high-pressure cooling systems.
Installation and Maintenance Guidelines
Installation Notes
After installation, it is essential to conduct low-speed adjustments to ensure that the rotational center of the joint remains concentric with the rotational center of the equipment. The anti-rotation mechanism on the joint housing must be flexible to avoid rigid constraints that could damage the sealing components.
Routine Maintenance
Regularly inspect seal wear and connection tightness. If leakage occurs after prolonged use, the equipment should be shut down promptly for seal replacement. The bearings are typically pre-lubricated with grease and are maintenance-free for life. However, routine cleaning of external dust accumulation helps improve heat dissipation.
Summary
Selecting the appropriate embedded rotary joint for continuous casting machines requires comprehensive consideration of medium type, temperature, pressure, installation space, and specific cooling circulation methods. Choosing the correct model and material combination ensures long-term, stable operation under the demanding conditions of continuous casting production.
