The impact resistant copper tile sliding bearing seat is a bearing support structure composed of a copper alloy bearing shell (referred to as "copper tile") as the core component of the sliding friction pair, combined with a seat body made of cast iron, cast steel, and other materials. It is mainly suitable for low-speed, heavy-duty, and high requirements for shock absorption and noise reduction working conditions. The following provides a detailed explanation from two aspects: core features and typical applications:

1、 Core characteristics of copper tile sliding bearing seat

1. Good friction and wear performance (core advantage)

Copper tiles (commonly made of tin bronze, lead bronze, aluminum bronze, etc.) themselves have good anti friction and wear resistance:

Tin bronze (such as ZCuSn10Pb1) contains tin and lead elements, and its surface is prone to forming a lubricating film, which can reduce dry friction between the shaft and the tile. Even if there is insufficient lubrication in the short term, it is not easy to "burn the tile";

Aluminum bronze (such as ZCuAl10Fe3) has higher hardness (Brinell hardness ≥ 110HB), strong wear resistance, and is suitable for long-term operation under heavy loads;

Compared to cast iron bearings, copper bearings have a lower coefficient of friction (usually 0.01~0.03, while cast iron bearings are about 0.03~0.05), generate less heat during operation, and reduce wear and tear on the shaft and bearings.

2. Strong load-bearing capacity, suitable for heavy-duty working conditions

Copper alloys have high compressive strength (tin bronze compressive strength ≥ 200MPa, aluminum bronze ≥ 500MPa), and when combined with the rigid seat body of sliding bearings (mostly gray cast iron HT250, cast steel ZG230-450), they can withstand extremely large radial loads (up to thousands of kN) and allow for certain impact loads (such as load fluctuations at the moment of start-up). Especially suitable for heavy-duty equipment with large shaft diameter and low speed (such as large motors and rolling mills), it will not cause deformation of the bearing or cracking of the seat due to excessive load.

3. Good shock absorption and noise reduction effect

The sliding friction structure itself has less vibration than rolling bearings, and the material toughness of copper tiles is better than that of cast iron, which can absorb the impact vibration during equipment operation (such as periodic vibration of crushers and ball mills), reducing the amplitude of vibration transmission to the frame; At the same time, the contact area between the copper tile and the shaft is large, and the friction noise is low (the operating noise is usually ≤ 65dB, lower than that of rolling bearings under the same working conditions), which is suitable for noise sensitive scenarios (such as large fans in the workshop).

4. Stability adapted to harsh working conditions

Good temperature resistance: Copper tiles have a wide working temperature range (-30 ℃~250 ℃, and some high-temperature bronzes can reach over 300 ℃), and strong thermal conductivity (copper's thermal conductivity is about 401W/(m · K), which is three times that of cast iron), which can quickly transfer the heat generated by friction to the seat and avoid local overheating damage;

Strong anti pollution ability: The clearance of sliding bearings is larger than that of rolling bearings. After a small amount of dust and impurities enter, the soft characteristics of copper tiles (relative to the steel material of the shaft) can reduce the scratches of impurities on the shaft, and it is not easy to get stuck due to impurities. It is suitable for environments with more dust (such as cement mills and mine crushers).

5. The structure can be customized to fit large-sized shaft systems

Copper tiles can be made into different shapes (such as cylindrical, elliptical, and multi oil wedge-shaped) through casting and cutting, suitable for different shaft diameters (from tens of millimeters to several meters of large shafts); The bearing seat can also be customized according to the equipment structure as a whole, split type (convenient for installation and disassembly), flange type, etc., especially suitable for supporting large diameter shaft systems of large equipment (such as large motor rotors, rolling mill rolls), and the size and bearing capacity of rolling bearings in such scenarios are often difficult to match.

6. Maintenance costs are controllable, but regular lubrication is required

The initial procurement cost of copper tile sliding bearing seats is higher than that of rolling bearing seats of the same specification, but the service life of copper tiles is long (up to 5-10 years under normal lubrication), and after wear, they can be repaired by "scraping" (reprocessing the contact surface of the bearing shell) without the need for overall replacement, reducing long-term maintenance costs; However, it is necessary to regularly replenish lubricating oil (such as industrial gear oil, hydraulic oil) to ensure the formation of a stable oil film between the friction pairs and avoid dry friction damage.

2、 Typical application scenarios of copper tile sliding bearing seat

Based on the core adaptability of "heavy load, low speed, impact resistance, and shock absorption", its application is concentrated in the fields of large heavy industrial equipment and low-speed heavy load machinery. The specific scenarios are as follows:

1. Metallurgical industry

Rolling mill: The rolling mill support part of a hot rolling mill or a cold rolling mill needs to withstand rolling loads of thousands of kN, and the rolling mill speed is low (usually ≤ 100r/min). The copper tile sliding bearing seat can ensure stable operation of the rolling mill through strong load-bearing capacity and shock absorption, avoiding steel plate precision deviation caused by vibration;

Continuous casting machine: crystallizer vibration device, roller shaft support of straightening machine, impact resistance of copper tiles can adapt to load fluctuations during continuous casting process, and the low noise characteristics meet the environmental protection requirements of the workshop.

2. Mining and building materials industry

Ball mill and rod mill: These types of equipment have a large simplified shaft diameter (up to 1-3 meters), low speed (15-30r/min), and impact loads during operation. The copper tile sliding bearing seat can withstand the huge radial load of the simplified body, and has strong resistance to dust pollution, reducing failures caused by impurities;

Cement rotary kiln: The supporting part of the supporting wheel of the rotary kiln needs to bear the weight of the kiln body (several hundred tons) and high temperature (the surface temperature of the kiln body is about 300 ℃). The temperature resistance and strong bearing capacity of the copper tile can ensure the smooth rotation of the kiln body and avoid axis deviation.

3. Heavy Machinery and Power Industry

Large motors/generators: rotor shaft support for high-power synchronous motors and hydro generators (with a shaft diameter of over 1 meter), low speed (≤ 300r/min) and high load. The low friction and high thermal conductivity of copper tiles can reduce motor heating and ensure long-term stable operation;

Crusher (jaw type, cone type): When crushing materials, strong impact loads are generated. The shock absorption of the copper tile sliding bearing seat can absorb the impact, protect the shaft system from damage, and the anti pollution ability is suitable for mining dust environment.

4. Other large-scale equipment fields

Ship propulsion system: The main shaft support of large cargo ships and engineering ships needs to withstand the axial and radial loads of propellers, and the working environment is humid. The corrosion resistance and strong bearing capacity of copper tiles (such as tin bronze) can adapt to marine conditions;

Large scale fans/pumps: Large centrifugal fans and circulating water pumps in power plants and chemical plants, with large shaft diameter (≥ 200mm) and medium speed (300-1500r/min). The low noise and long service life characteristics of copper tiles can reduce equipment maintenance frequency and lower operating costs.

3、 Selection and usage precautions

Copper tile material matching: choose aluminum bronze (high hardness) for heavy-duty and impact applications; Low speed, requiring friction reducing properties, choose tin bronze (easy to form oil film); Choose lead bronze or special high-temperature bronze for high-temperature working conditions;

Lubrication method adaptation: manual oil injection is optional for light load and low speed; Heavy loads and high speeds require a mandatory lubrication system (such as oil pump circulation supply) to ensure stable oil film;

Installation accuracy control: When installing the split type copper tile bearing seat, it is necessary to ensure the fit between the upper and lower tiles (clearance ≤ 0.05mm) to avoid local wear caused by uneven clearance;

Regular maintenance focus: Regularly check the lubricating oil level and quality, and replace deteriorated lubricating oil in a timely manner; Check the wear of copper tiles every 1-2 years and repair them with scraping if necessary to extend their service life.