Bearing heater cabinet based on low pressure industrial steam

Abstract

The utility model relates to the heating before bearing assembly, concretely relates to a bearing heating heat preservation box based on low pressure industrial steam, including cylinder, the bottom end of cylinder is closed, the top of cylinder is equipped with the end cover that can open, the cylinder includes the inner cylinder and intermediate cylinder of together cover, and the closed heat conduction cavity is formed between the inner cylinder and intermediate cylinder, and the heat conduction cavity connects steam input pipe and steam output pipe, be equipped with a plurality of heat conduction module on the cylinder, and each heat conduction module includes a plurality of heat conduction rod that passes through the inner cylinder, intermediate cylinder and heat conduction cavity, and the one end of heat conduction rod in the cylinder is connected to the vertical heat conduction block in common, heat conduction rod can move axially, to heat conduction block can drive the direction of moving towards or away from the center of cylinder. The utility model passes through heat conduction rod and heat conduction block and directly with bearing outer wall contact heat transfer, compared with non-contact type steam heating, has improved heat transfer efficiency greatly, has shortened heating time.

Description

Technical Field

[0001] This utility model relates to heating before bearing assembly, specifically to a bearing heating and insulation box based on low-pressure industrial steam. Background Technology

[0002] In the field of machinery manufacturing, the assembly of rolling bearings is very common. To ensure assembly accuracy, improve work efficiency, and reduce the burden on operators, the industry often adopts a heat-fitting process, which involves preheating the bearing before installation. However, the heating temperature must be strictly controlled to not exceed 120℃, as exceeding this critical value may cause changes in the microstructure of the bearing material, resulting in irreversible deformation, which in turn affects the bearing's performance and fitting accuracy.

[0003] Common bearing heating methods include electric heating and high-temperature oil bath heating. High-temperature oil bath heating is messy and the bearing is easily contaminated; electric heating has high energy consumption and high cost. Therefore, a steam heat transfer bearing heater with publication number "CN210756183U" and a steam rolling bearing heater with publication number "CN201685077U" adopt steam heating.

[0004] To avoid bearing corrosion, the steam-type rolling bearing heater with publication number "CN201685077U" adopts non-contact heating, that is, steam is introduced into the jacket layer of the heater body, the bearing is located in the heater body, but the bearing does not contact the jacket layer, resulting in low heat transfer efficiency, long heating time, and insufficient utilization of steam thermal energy.

[0005] The steam heat transfer bearing heater disclosed in CN210756183U injects machine oil into the shell to improve heat transfer efficiency and uses oil to conduct heat. Although this improves heat transfer efficiency, it has the drawbacks of conventional oil bath heating. Utility Model Content

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a bearing heating and insulation box based on low-pressure industrial steam to solve the above problems.

[0007] The bearing heating and insulation box based on low-pressure industrial steam of this utility model includes a cylindrical body with a closed bottom and an openable end cap at the top. The cylindrical body includes an inner cylinder and an intermediate cylinder nested together, forming a closed heat-conducting cavity between them. The heat-conducting cavity is connected to a steam input pipe and a steam output pipe. The cylindrical body is provided with multiple heat-conducting modules, each including several heat-conducting rods that penetrate the inner cylinder, the intermediate cylinder, and the heat-conducting cavity. One end of each heat-conducting rod is connected to a vertical heat-conducting block. The heat-conducting rods can move axially, thereby driving the heat-conducting block to move towards or away from the center of the cylindrical body.

[0008] The bearing to be heated is placed inside the cylinder, and the heat-conducting rod is pushed, causing the inner side of the heat-conducting block to press tightly against the outer wall of the bearing. Steam enters the heat-conducting cavity between the inner cylinder and the intermediate cylinder, heating the heat-conducting rod. The heat-conducting rod then transfers heat to the bearing through the heat-conducting block, thus heating the bearing. Compared to non-contact methods, this significantly improves heat transfer efficiency and shortens heating time.

[0009] Preferably, both the inner cylinder and the intermediate cylinder are cylindrical and are coaxially fitted together.

[0010] Preferably, the inner surface of the heat-conducting block is an arc shape that matches the outer circular surface of the bearing to improve heat conduction efficiency.

[0011] Furthermore, the end of the heat-conducting rod located outside the intermediate cylinder is connected to a vertical connecting rod, which in turn connects to a horizontal push-pull rod for the circumferential movement of the heat-conducting rod.

[0012] Furthermore, an outer cylinder is fitted over the intermediate cylinder, forming a closed, insulated cavity between the outer cylinder and the intermediate cylinder. The connecting rod is located inside the insulated cavity, and one end of the push-pull rod extends out of the outer cylinder. This prevents the heat-conducting rod from transferring heat to the outside of the cylinder, thus improving the thermal energy utilization rate of the steam.

[0013] Preferably, the end of the push-pull rod extending out of the outer cylinder is provided with a heat insulation sleeve.

[0014] The advantages of this utility model compared with the prior art are:

[0015] 1) Improved heat transfer efficiency: This utility model directly contacts the outer wall of the bearing with the heat-conducting rod and heat-conducting block for heat transfer. Compared with non-contact steam heating, it greatly improves the heat transfer efficiency, shortens the heating time, and makes fuller use of steam heat energy. It effectively solves the problems of low heat transfer efficiency and long heating time of existing non-contact steam heating.

[0016] 2) Avoid bearing contamination: Low-pressure industrial steam is used as a heat source, which avoids the problem of bearing contamination that occurs when heating with a high-temperature oil bath, thus ensuring the cleanliness of the bearing.

[0017] 3) Reduced energy consumption and costs: Compared with electric heating, waste low-pressure industrial steam can be used for heating, which consumes less energy and costs less, saving production costs for enterprises.

[0018] 4) Improve thermal energy utilization: The intermediate cylinder is surrounded by an outer cylinder to form an insulation cavity. The connecting rod is located inside the insulation cavity, which can prevent the heat-conducting rod from transferring heat to the outside of the cylinder, reduce heat loss, and improve the thermal energy utilization of steam.

[0019] 5) Easy to operate: The heat-conducting rod and heat-conducting block are moved by the push-pull rod and connecting rod, so as to achieve the tightness and separation of the heat-conducting block with the outer wall of the bearing. The operation is simple and convenient and easy for workers to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Steam inlet pipe; 2. End cap; 3. Inner cylinder; 4. Intermediate cylinder; 5. Outer cylinder; 6. Heat-conducting cavity; 7. Insulation cavity; 8. Heat-conducting rod; 9. Mechanical seal kit; 10. Connecting rod; 11. Push-pull rod; 12. Heat insulation sleeve; 13. Heat-conducting block; 14. Steam outlet pipe; 15. Steam trap; 16. Bearing. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0024] like Figure 1 As shown, this embodiment is achieved through the following technical solution: a bearing heating and insulation box based on low-pressure industrial steam, comprising a cylinder, the bottom of which is closed, and an openable end cap 2 at the top of which is provided. Insulation material is provided on the outermost layer of the cylinder and inside the end cap 2.

[0025] The cylinder body includes an inner cylinder 3, an intermediate cylinder 4, and an outer cylinder 5. The inner cylinder 3, intermediate cylinder 4, and outer cylinder 5 are all cylindrical and coaxially nested together. A closed heat-conducting cavity 6 is formed between the inner cylinder 3 and the intermediate cylinder 4, and a closed heat-insulating cavity 7 is formed between the outer cylinder 5 and the intermediate cylinder 4. The heat-conducting cavity 6 is connected to a steam inlet pipe 1 and a steam outlet pipe 14, and a steam trap 15 is provided on the steam outlet pipe 14.

[0026] The cylinder is equipped with multiple heat-conducting modules. Each heat-conducting module includes several heat-conducting rods 8 that penetrate the inner cylinder 3, the intermediate cylinder 4, and the heat-conducting cavity 6. The ends of the heat-conducting rods 8 located inside the cylinder are connected to the vertical heat-conducting block 13. The inner surface of the heat-conducting block 13 is an arc shape that matches the outer circular surface of the bearing 16.

[0027] The heat-conducting rod 8 is axially movable, thereby driving the heat-conducting block 13 to move towards or away from the center of the cylinder. Mechanical seals 9 are provided at the sliding contact points between the heat-conducting rod 8 and the inner cylinder 3 and intermediate cylinder 4 to prevent steam leakage. One end of the heat-conducting rod 8 outside the intermediate cylinder 4 is connected to a vertical connecting rod 10, which in turn connects to a horizontal push-pull rod 11. The connecting rod 10 is located inside the insulation cavity 7, and one end of the push-pull rod 11 extends out of the outer cylinder 5. A heat-insulating sleeve 12 is provided at the end of the push-pull rod 11 extending out of the outer cylinder 5.

[0028] In this embodiment, the heat-conducting rod 8 and the heat-conducting block 13 are made of metal with high thermal conductivity; the connecting rod 10, the push-pull rod 11 and the heat insulation sleeve 12 are made of materials with low thermal conductivity.

[0029] In use, the bearings 16 to be heated are stacked inside the cylinder. Pushing the push-pull rod 11 moves the heat-conducting block 13 through the connecting rod 10 and the heat-conducting rod 8, so that its inner side is pressed tightly against the outer wall of the bearing 16. Steam enters the heat-conducting cavity 6 between the inner cylinder 3 and the intermediate cylinder 4, heating the multiple heat-conducting rods 8. The multiple heat-conducting rods 8 transfer heat to the bearings 16 through the heat-conducting block 13, thus heating the bearings.

[0030] After the set heating time is reached, pull or use a tool to push the lever 11 (because the temperature of the lever 11 is high at this time) to move the heat-conducting block 13 outward and separate it from the bearing 16, and then remove the bearing 16.

[0031] Compared with non-contact heating, this invention can greatly improve heat transfer efficiency and shorten heating time.

[0032] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A low pressure industrial steam based bearing heating oven comprising a cylindrical body, the bottom end of the cylindrical body is closed, the top end of the cylindrical body is provided with an openable end cover (2), characterized in that, The cylinder includes an inner cylinder (3) and an intermediate cylinder (4) nested together. A closed heat-conducting cavity (6) is formed between the inner cylinder (3) and the intermediate cylinder (4). The heat-conducting cavity (6) is connected to the steam input pipe (1) and the steam output pipe (14). The cylinder is provided with multiple heat-conducting modules. Each heat-conducting module includes several heat-conducting rods (8) that penetrate the inner cylinder (3), the intermediate cylinder (4), and the heat-conducting cavity (6). The heat-conducting rods (8) are located at one end inside the cylinder and are connected to a vertical heat-conducting block (13). The heat-conducting rods (8) can move axially, thereby driving the heat-conducting block (13) to move toward or away from the center of the cylinder.

2. The low pressure industrial steam based bearing heating incubator of claim 1, wherein, The inner cylinder (3) and the intermediate cylinder (4) are both cylindrical and are coaxially fitted together.

3. The low pressure industrial steam based bearing heating incubator of claim 1, wherein, The inner surface of the heat-conducting block (13) is an arc shape that matches the outer circular surface of the bearing (16).

4. The low pressure industrial steam based bearing heating incubator of claim 1, wherein, The end of the heat-conducting rod (8) located outside the intermediate cylinder (4) is connected to the vertical connecting rod (10), and the connecting rod (10) is connected to the horizontal push-pull rod (11).

5. The low pressure industrial steam based bearing heating incubator of claim 4, wherein, An outer cylinder (5) is also fitted outside the intermediate cylinder (4), and a closed heat-insulating cavity (7) is formed between the outer cylinder (5) and the intermediate cylinder (4). The connecting rod (10) is located inside the heat-insulating cavity (7), and one end of the push-pull rod (11) extends out of the outer cylinder (5).

6. The low pressure industrial steam based bearing heating incubator of claim 5, wherein, The end of the push-pull rod (11) extending out of the outer cylinder (5) is provided with a heat insulation sleeve (12).

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