A water-cooled bearing seat for roller hearth furnace and cooling method thereof

Abstract

The present invention provides a water-cooled bearing seat for a roller hearth furnace and a cooling method thereof. The water-cooled bearing seat comprises: a seat body, in which a bearing position and a hole for a shaft to pass are arranged; a connecting flange fixed at both ends of the seat body in the axial direction; an oil injection channel arranged on the outer wall of the seat body; and a cooling pipe sleeved outside the seat body and located between the connecting flanges. The outer wall of the seat body, the outer wall of the connecting flange, the outer wall of the oil injection channel, and the inner wall of the cooling pipe form a sealed water cooling channel. The seat body comprises a first connecting part provided with a bearing position, and a second connecting part connected to the head of the first connecting part. A water inlet and a water outlet are arranged on the cooling pipe. The present invention also provides a corresponding cooling method, including supplying oil through the oil injection channel, monitoring the temperature, and adjusting the cooling water flow rate. The device has a compact structure, good cooling effect, and is easy to install and maintain.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, and in particular to a water-cooled bearing seat of a roller hearth furnace and a cooling method thereof. Background Art

[0002] Roller-hearth furnaces are commonly used heating equipment in the metallurgical industry. The roller bearing seats inside them work in a high-temperature environment and require a good cooling system to ensure their normal operation. Air-cooled bearing seats are commonly used in the prior art for cooling. However, with the improvement of process requirements, the temperature inside the furnace continues to rise, and traditional air-cooled bearing seats can no longer meet the demand for rapid cooling. This causes the bearing seats to overheat easily, affecting the service life of the bearings and may even cause equipment failure. In addition, the existing bearing seats have a complex structure, are inconvenient to install and maintain, and lack an automated control system, making it impossible to achieve intelligent management. Summary of the invention

[0003] The object of the present invention is to provide a water-cooled bearing seat for a roller hearth furnace and a cooling method thereof, so as to solve the problems existing in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] In a first aspect, the present invention provides a water-cooled bearing seat for a roller hearth furnace, comprising:

[0006] A seat body, wherein a bearing seat for accommodating the bearing and a hole for the shaft to pass through are provided in the seat body;

[0007] Connecting flanges are fixed at both ends of the seat body in the axial direction;

[0008] An oil injection channel is provided on the outer wall of the seat body and is used to supply lubricating oil to the bearing position;

[0009] The cooling pipe is sleeved outside the base body and is located between the connecting flanges;

[0010] The outer wall of the seat body, the outer wall of the connecting flange, the outer wall of the oil injection channel and the inner wall of the cooling pipe form a sealed water cooling channel; the cooling pipe is provided with a water inlet for connecting to external cooling water and a water outlet for discharging water to the outside.

[0011] In some optional embodiments of the present invention, the seat body includes a first connection part provided with the bearing position, and a second connection part whose tail is connected to the head of the first connection part; the shaft passes through the second connection part.

[0012] Preferably, the oil injection channel is arranged on the outer wall of the first connecting part.

[0013] Further preferably, the oil injection channel is arranged along the radial direction of the first connecting portion.

[0014] Preferably, the first connecting portion and the second connecting portion are connected by welding.

[0015] In some optional embodiments of the present invention, a connecting flange is respectively provided at the tail of the first connecting part and the head of the second connecting part.

[0016] Preferably, the connecting flanges are all welded to the seat body.

[0017] In some optional embodiments of the present invention, the water inlet and the water outlet are both arranged along the radial direction of the cooling pipe.

[0018] Preferably, the water outlet is located below the bearing position.

[0019] In a second aspect, the present invention provides a method for cooling a water-cooled bearing seat of a roller hearth furnace, comprising the following steps:

[0020] Supply lubricating oil to the bearing position through the oil injection channel;

[0021] Monitor the bearing seat temperature, cool the bearing seat through the water cooling channel, and adjust the cooling water flow according to the bearing seat temperature.

[0022] In some optional embodiments of the present invention, the step of supplying lubricating oil to the bearing position through the oil injection channel includes: manual oiling or automatic oiling through a centralized dry oil lubrication system.

[0023] Beneficial effects of the present invention:

[0024] 1. Water cooling is used instead of traditional air cooling, which significantly improves the cooling effect;

[0025] 2. Simple and reasonable structure, easy installation and maintenance;

[0026] 3. Realize intelligent control and improve the automation level of equipment;

[0027] 4. Extend the service life of bearings and improve equipment reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present invention.

[0029] Figure 1 It is a structural schematic diagram of a water-cooled bearing seat for a roller hearth furnace of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, the water-cooled bearing seat for the roller hearth furnace designed in this embodiment includes: a seat body 1, a connecting flange 2, an oil injection channel 3 and a cooling pipe 4.

[0033] The seat body 1 has good mechanical strength and heat resistance. The seat body 1 is divided into two main parts: the first connection part 1.1 and the second connection part 1.2. The first connection part 1.1 has a precise bearing seat 1.11 processed inside, with a surface roughness of Ra0.8 and a cylindrical error of no more than 0.02mm, to ensure the accuracy of bearing installation. The second connection part 1.2 is cylindrical, and the outer diameter of the second connection part 1.2 is smaller than the inner diameter of the first connection part 1.1, for the passage of the shaft.

[0034] The connecting flange 2 is made of the same material, and multiple bolt holes are evenly arranged on the flange, and a reliable connection is achieved through high-strength bolts. An automated welding process is used between the connecting flange 2 and the seat body 1 to ensure the quality of the weld. The weld adopts a V-shaped groove, and X-ray flaw detection is performed after welding.

[0035] The oil injection channel 3 is arranged along the radial direction of the first connecting part 1.1 and can be matched with a standard oil injection nozzle. A one-way valve structure is designed inside the oil injection channel 3 to prevent the lubricating oil from flowing back. The inner wall of the channel is chrome-plated to improve wear resistance and corrosion resistance.

[0036] An annular water cooling channel 5 is formed between the cooling pipe 4 and the seat body 1. The water inlet 4.1 and the water outlet 4.2 adopt standard interfaces, and the water inlet 4.1 is located at the top, and the water outlet 4.2 is located just below the bearing position 1.11 to ensure sufficient circulation of cooling water.

[0037] Example 2: Sealing structure optimization example

[0038] This embodiment focuses on optimizing the sealing structure of the water cooling channel. A double sealing structure is used between the seat body and the cooling pipe, and between the connecting flange and the cooling pipe:

[0039] Main seal: Fluororubber O-ring with a shore hardness of 75 degrees and a temperature resistance range of -20°C to 200°C. The design of the O-ring groove follows standard specifications, with a groove depth of 75% of the O-ring cross-sectional diameter and a groove width of 130% of the cross-sectional diameter.

[0040] Auxiliary seal: A labyrinth seal structure is designed on the outside of the O-ring, consisting of three concentric ring grooves with a groove depth of 2mm and a groove width of 1.5mm, which can effectively prevent cooling water leakage.

[0041] Sealing surface treatment: The sealing mating surface is ground, the surface roughness reaches Ra0.4, and the flatness is controlled within 0.02mm.

[0042] Example 3

[0043] In this embodiment, the water-cooled bearing seat device is equipped with an intelligent control system. The system mainly includes a PLC controller, a temperature sensor and a flow control valve. The temperature sensor is installed on the surface of the bearing seat body to monitor the bearing seat temperature in real time. When the temperature exceeds the set threshold (for example, 60°C), the PLC controller automatically adjusts the flow control valve to increase the cooling water flow.

[0044] The centralized dry oil lubrication system is intelligently controlled through the PLC controller. The system automatically adjusts the lubrication cycle and oil supply according to the equipment operating conditions. Under standard conditions, the lubrication cycle is set to once every 8 hours, and the single oil supply time is 30 seconds. When the equipment is in a high-load operation state, the system will automatically shorten the lubrication cycle to once every 4 hours.

[0045] Example 4

[0046] This embodiment provides a complete water-cooled bearing seat cooling method. The method includes the following specific steps:

[0047] 1. System initialization:

[0048] Start the PLC control system, check the status of each sensor, and confirm the pressure of the cooling water system (the standard working pressure is 0.3MPa);

[0049] 2. Operation control:

[0050] Start the cooling water circulation, set the initial flow rate to 20L / min, start the temperature monitoring system, activate the lubrication system, and set the initial lubrication parameters;

[0051] 3. Intelligent adjustment:

[0052] Monitor the bearing seat temperature in real time, automatically adjust the cooling water flow according to temperature changes, and dynamically adjust the lubrication cycle and oil supply;

[0053] 4. Security protection:

[0054] Set the temperature alarm threshold (70°C), configure the abnormal flow alarm function, and establish a lubrication system fault diagnosis mechanism.

[0055] Embodiment 5:

[0056] Application optimization for different working conditions:

[0057] 1. Low temperature conditions (furnace temperature <800℃):

[0058] Cooling water flow: 15L / min, lubrication cycle: 12 hours, temperature alarm threshold: 55°C;

[0059] 2. Medium temperature conditions (furnace temperature 800-1000℃):

[0060] Cooling water flow: 20L / min, lubrication cycle: 8 hours, temperature alarm threshold: 65℃;

[0061] 3. High temperature conditions (furnace temperature>1000℃):

[0062] Cooling water flow: 25L / min, lubrication cycle: 4 hours, temperature alarm threshold: 70℃.

[0063] The water-cooled bearing seat device of the present invention realizes effective cooling and lubrication of roller hearth furnace bearings through optimized structural design and intelligent control system. Practical application shows that the device can control the bearing seat temperature within a safe range, significantly prolong the service life of the bearing, and improve the reliability and automation level of the equipment. At the same time, the design of the quick installation interface greatly simplifies the installation and maintenance work and reduces the maintenance cost. The device has been successfully applied in multiple roller hearth furnace projects and achieved good results.

[0064] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A water-cooled bearing seat for a roller hearth furnace, characterized in that: include: A seat body, wherein a bearing seat for accommodating the bearing and a hole for the shaft to pass through are provided in the seat body; Connecting flanges are fixed at both ends of the seat body in the axial direction; An oil injection channel is provided on the outer wall of the seat body and is used to supply lubricating oil to the bearing position; The cooling pipe is sleeved outside the base body and is located between the connecting flanges; The outer wall of the base body, the outer wall of the connecting flange, the outer wall of the oil injection channel and the inner wall of the cooling pipe form a sealed water cooling channel; the cooling pipe is provided with a water inlet for connecting to external cooling water and a water outlet for discharging water to the outside.

2. The water-cooled bearing seat for a roller hearth furnace according to claim 1, characterized in that: The seat body comprises: a first connection part provided with the bearing position, a second connection part whose tail is connected to the head of the first connection part; and a shaft passes through the second connection part.

3. The water-cooled bearing seat for a roller hearth furnace according to claim 2, characterized in that: The oil injection channel is arranged on the outer wall of the first connecting part.

4. The water-cooled bearing seat for a roller hearth furnace according to claim 3, characterized in that: The oil injection channel is arranged along a radial direction of the first connecting portion.

5. The water-cooled bearing seat for a roller hearth furnace according to claim 2, 3 or 4, characterized in that: The first connection portion and the second connection portion are connected by welding.

6. The water-cooled bearing seat for a roller hearth furnace according to claim 2, 3 or 4, characterized in that: A connecting flange is respectively arranged at the tail of the first connecting part and the head of the second connecting part.

7. The water-cooled bearing seat for a roller hearth furnace according to claim 6, characterized in that: The connecting flanges are all welded on the seat body.

8. The water-cooled bearing seat for a roller hearth furnace according to claim 1, characterized in that: The water inlet and the water outlet are both arranged along the radial direction of the cooling pipe.

9. The water-cooled bearing seat for a roller hearth furnace according to claim 8, characterized in that: The water outlet is located below the bearing position.

10. A cooling method for a water-cooled bearing seat of a roller hearth furnace according to any one of claims 1 to 9, characterized in that: The following steps are involved: Supply lubricating oil to the bearing position through the oil injection channel; Monitor the bearing seat temperature, cool the bearing seat through the water cooling channel, and adjust the cooling water flow according to the bearing seat temperature.

Images