Bearings for high temperature environments and their manufacturing process

Abstract

The present invention discloses a bearing for high-temperature environments and a manufacturing process thereof, which relates to the field of bearing manufacturing. The bearing comprises an outer ring, an inner ring, and a steel column retaining frame structure. A through groove and a cooling groove are provided inside the outer ring. A sliding block is slidably provided on the inner wall of the through groove. A positioning hole is provided on the top of the sliding block. A metal strip is rotatably connected to one side of the sliding block. The present invention provides a through groove and a cooling groove inside the outer ring. When the temperature inside the bearing rises, the metal strip deforms and arches, dragging the sliding block along the through groove. The positioning hole and the whistle hole are mutually positioned. Since the interior of the through groove is initially in a sealed state, the air inside will expand rapidly under high temperature conditions. When the positioning hole and the whistle hole are aligned and positioned, the expanded air will be discharged from the whistle hole. The airflow will drive the whistle inside the whistle hole to sound, thereby alerting the staff.

Description

Technical Field

[0001] The present invention relates to the field of bearing manufacturing, and in particular to a bearing for high-temperature environments and a manufacturing process thereof. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. There are many types of bearings according to different classification standards. For example, according to the type of rolling element, they are divided into ball bearings and roller bearings; according to whether they can be aligning, they are divided into aligning bearings and non-aligning bearings; according to the number of rows of rolling elements, they are divided into single-row bearings, double-row bearings and multi-row bearings; according to whether the components can be separated, they are divided into separable bearings and non-separable bearings.

[0003] Bearings used in high-temperature environments are called high-temperature bearings. They are usually made of some high-temperature resistant materials, such as stainless steel and ceramics. In addition, high-temperature bearings also require special lubrication methods, such as high-temperature grease lubrication, solid lubrication and material surface treatment lubrication, to ensure the normal operation of the bearings in high-temperature environments.

[0004] However, high-temperature bearings also have a certain tolerance range in high-temperature environments. Once the critical point is exceeded, the bearing performance may be degraded, the life may be shortened, or even damaged, such as material performance degradation, lubrication failure, thermal expansion, etc. However, there are few temperature monitoring of bearings. When the bearings produce various performance degradations, the situation is often irreversible. At this time, the cooling effect is also difficult to restore the bearings to their original working state. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a bearing for high temperature environment and a manufacturing process thereof, so as to solve the technical problem that general bearings lack temperature monitoring.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a bearing for high-temperature environments, comprising an outer ring, an inner ring and a steel column retaining frame structure, a through groove and a cooling groove being provided inside the outer ring, a sliding block being slidingly provided on the inner wall of the through groove, a positioning hole being provided on the top of the sliding block, a metal bar being rotatably connected to one side of the sliding block, the other end of the metal bar being rotatably connected to the inner bottom wall of the through groove, a slider being connected to the outer wall of one side of the sliding block, a water-permeable hole being provided on the top of the slider, a plurality of whistle holes and connecting holes being respectively provided on the outer wall of the outer ring, the apertures of the whistle holes being arranged from large to small, and a one-way air intake valve being provided on the outer wall of the outer ring.

[0007] The present invention is further configured such that the whistle holes are arranged along the circumference of the outer ring.

[0008] The present invention is further configured such that the metal strip is an arc-shaped structure and is composed of a double layer of metal.

[0009] The present invention is further configured such that the double metal layers of the metal strip are aluminum and steel, and the double metal layers are bonded to each other.

[0010] The present invention is further configured such that a sliding groove is provided on the inner wall of the through groove, and one end of the sliding block is inserted into the interior of the sliding groove.

[0011] The present invention is further configured such that one end of the connecting hole extends to the interior of the cooling tank, the other end of the connecting hole is connected to an external cooling water mechanism, and a water outlet hole is provided on the outer wall of the outer ring.

[0012] The present invention is further configured such that a sealing cover is provided on the surface of the outer ring, and the sealing cover seals the through groove.

[0013] The present invention is further configured such that the inner wall of the cooling groove is provided with a plurality of support bars.

[0014] A manufacturing process for a bearing for a high temperature environment comprises the following steps:

[0015] S1: Prepare molds for outer rings, inner rings, steel column cage structures, sealing covers and other related components, and prepare related components based on the molds. The outer rings, inner rings, steel column cage structures and sealing covers are mainly made of high-temperature bearing steel and are processed through forging, heat treatment, grinding and other processes.

[0016] S2: The horizontal surface of the outer ring is milled with a through groove, a slide groove and a cooling groove using a milling machine. The whistle hole and the connection hole are drilled on the arc surface of the outer ring. The connection hole penetrates into the interior of the cooling groove. The sliding block and the slider are welded and fixed. The positioning hole and the water outlet hole are drilled on the sliding block and the slider respectively. Finally, the installation hole for the one-way air intake valve is drilled on the outer ring.

[0017] S3: Install the welded sliding block and slider into the through groove and the slide groove respectively, install the metal strip, and rotatably connect the two ends of the metal strip to the sliding block and the inner wall of the through groove, weld multiple support strips on the inner wall of the cooling groove, and install the one-way air intake valve;

[0018] S4: Weld the sealing cover to seal the through groove, and assemble the outer ring, inner ring, and steel column cage structure.

[0019] In summary, the present invention mainly has the following beneficial effects: the present invention opens a through groove and a cooling groove inside the outer ring. When the temperature inside the bearing rises, the metal strip deforms and arches, and drags the sliding block to move along the through groove, and is positioned relative to each other by the positioning hole and the whistle hole. Since the inside of the through groove is initially in a sealed state, the internal air will expand rapidly under high temperature conditions. When the positioning hole and the whistle hole are aligned and positioned, the expanded air will be discharged from the whistle hole, and the airflow will push the whistle inside the whistle hole to make a sound, thereby reminding the staff. Moreover, since the aperture of the whistle hole changes from large to small, the sound will become louder and louder as the temperature rises. When the temperature reaches a certain level, the sliding block will push the slider to move, so that the connecting hole is connected, and the cooling water flows into the cooling groove for cooling, thereby preventing the bearing from overheating and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the internal structure of the present invention;

[0022] Figure 3 For the present invention Figure 3 Front view of

[0023] Figure 4 For the present invention Figure 2 A magnified view of the structure at point A;

[0024] Figure 5 For the present invention Figure 2 A magnified view of the structure at point B;

[0025] Figure 6 For the present invention Figure 3 A magnified view of the structure at point C;

[0026] Figure 7 For the present invention Figure 3 Enlarged view of the structure at point D.

[0027] In the figure: 1. Outer ring; 2. Inner ring; 3. Steel column retaining frame structure; 4. Through groove; 5. Sliding block; 6. Positioning hole; 7. Whistle hole; 8. Metal strip; 9. Slide groove; 10. Slider; 11. Water hole; 12. Connecting hole; 13. Cooling groove; 14. Support bar; 15. Water outlet; 16. Sealing cover; 17. One-way air valve. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0029] A bearing for high temperature environment, such as Figure 1-7 As shown, it includes an outer ring 1, an inner ring 2 and a steel column retaining frame structure 3. A through groove 4 is provided inside the outer ring 1. A sliding block 5 is slidingly provided on the inner wall of the through groove 4. A positioning hole 6 is provided on the top of the sliding block 5. The contact surface between the sliding block 5 and the through groove 4 is provided with a high-temperature resistant sealing material. A metal strip 8 is rotatably connected to one side of the sliding block 5, and the other end of the metal strip 8 is rotatably connected to the inner bottom wall of the through groove 4. A plurality of whistle holes 7 are respectively provided on the outer wall of the outer ring 1.

[0030] The metal strip 8 is an arc-shaped structure and is made of a double layer of metal, such as aluminum and steel. The active layer has a larger expansion coefficient and the passive layer has a smaller expansion coefficient. When subjected to temperature, the active layer has a larger expansion coefficient than the passive layer, and the two materials are firmly bonded to each other. Therefore, the free elongation of the active layer is restrained by the passive layer, and the free elongation of the passive layer is stretched by the active layer. The resulting combined torque causes the metal strip 8 to bend. Therefore, when the temperature rises, the metal strip 8 will arch upward and pull the sliding block 5 to move along the through groove 4 until the positioning hole 6 is aligned with the whistle hole 7, and the air inside is discharged.

[0031] Since the outer wall of the outer ring 1 is provided with a one-way air intake valve 17, air can only enter the interior of the through groove 4 in one direction. At this time, when the temperature rises, the air inside the through groove 4 expands due to the heat. Since the internal volume of the through groove 4 remains unchanged, the internal pressure becomes larger. When the positioning hole 6 is aligned with the whistle hole 7, the through groove 4 is connected to the outside world, and the air is instantly ejected from the whistle hole 7. The inside of the whistle hole 7 is provided with a common whistle structure. When the air circulates rapidly, the whistle hole 7 will make a sound, thereby reminding the staff that the temperature inside the surface bearing has risen.

[0032] Furthermore, the apertures of the four whistle holes 7 are arranged from large to small and along the circumference of the outer ring 1. The higher the temperature, the longer the movement distance of the sliding block 5, the smaller the aperture of the whistle hole 7 positioned by the positioning hole 6, and the louder the sound. At this time, in addition to reminding the staff, the inside of the bearing also needs to be cooled down quickly.

[0033] A cooling groove 13 is provided inside the outer ring 1, and a connecting hole 12 is provided on the outer wall of the outer ring 1. One end of the connecting hole 12 extends to the inside of the cooling groove 13, and the other end of the connecting hole 12 is connected to the external cooling water mechanism. A water outlet 15 is provided on the outer wall of the outer ring 1, and a slide groove 9 is provided on the inner wall of the through groove 4. One end of the slider 10 is inserted into the inside of the slide groove 9. The contact surface between the slider 10 and the through groove 4 is provided with a high-temperature resistant sealing material. In the initial state, the connecting hole 12 is sealed and blocked by the slider 10 connected to the outer wall of one side of the sliding block 5, and the cooling water cannot enter the interior of the cooling groove 13 through the connecting hole 12. When the temperature rises further, the movement of the sliding block 5 will push the slider 10 to move synchronously along the slide groove 9, so that the water permeable hole 11 is aligned with the connecting hole 12. At this time, the cooling water can enter the cooling groove 13 to cool the inside of the bearing, and the cooling water circulates with the external cooling water mechanism through the water outlet 15.

[0034] On the basis of the above structure, the water permeable hole 11 is an oblong hole structure. When the positioning hole 6 is aligned with the two larger whistle holes 7, the water permeable hole 11 will connect the connecting hole 12 to supply cooling water.

[0035] As the cooling water enters, the temperature inside the bearing gradually decreases. At this time, the air temperature inside the through groove 4 gradually decreases, the air volume gradually decreases, and the metal bar 8 gradually recovers from the arched state, pushing the sliding block 5 and the slider 10 to reset, and the outside air re-enters the interior of the through groove 4 under the action of pressure.

[0036] A sealing cover 16 is provided on the surface of the outer ring 1 , and the sealing cover 16 seals the through groove 4 .

[0037] The inner wall of the cooling groove 13 is provided with a plurality of support bars 14 , which can effectively enhance the strength of the cooling groove 13 and improve the strength of the bearing.

[0038] A manufacturing process for a bearing for a high temperature environment comprises the following steps:

[0039] S1: Prepare molds for related components such as the outer ring 1, inner ring 2, steel column cage structure 3, and sealing cover 16, and prepare related components based on the molds. The outer ring 1, inner ring 2, steel column cage structure 3, and sealing cover 16 are made of high-temperature bearing steel as the main material and are processed through forging, heat treatment, grinding, and other processes.

[0040] S2: A through groove 4, a slide groove 9, and a cooling groove 13 are milled out on the horizontal surface of the outer ring 1 using a milling machine. A whistle hole 7 and a connecting hole 12 are drilled on the curved surface of the outer ring 1. The connecting hole 12 extends into the interior of the cooling groove 13. The sliding block 5 and the slider 10 are welded and fixed. A positioning hole 6 and a water outlet hole 15 are drilled on the sliding block 5 and the slider 10, respectively. Finally, a mounting hole for installing the one-way air intake valve 17 is drilled on the outer ring 1.

[0041] S3: Install the welded sliding block 5 and slider 10 into the through groove 4 and the slide groove 9 respectively, install the metal bar 8, and rotatably connect the two ends of the metal bar 8 to the sliding block 5 and the inner wall of the through groove 4. Weld multiple support bars 14 to the inner wall of the cooling groove 13, and install the one-way air intake valve;

[0042] S4: Weld and seal the through groove 4 with the sealing cover 16, and assemble the outer ring 1, the inner ring 2, and the steel column retainer structure 3.

[0043] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A bearing for use in a high temperature environment, comprising an outer ring (1), an inner ring (2) and a steel column retainer structure (3), characterized in that: The outer ring (1) is provided with a through groove (4) and a cooling groove (13), the inner wall of the through groove (4) is provided with a sliding block (5) for sliding sliding, the top of the sliding block (5) is provided with a positioning hole (6), one side of the sliding block (5) is rotatably connected to a metal strip (8), the other end of the metal strip (8) is rotatably connected to the inner bottom wall of the through groove (4), the outer wall of one side of the sliding block (5) is connected to a slider (10), the top of the slider (10) is provided with a water-permeable hole (11), the outer wall of the outer ring (1) is provided with a plurality of whistle holes (7) and connecting holes (12), the apertures of the whistle holes (7) are arranged from large to small and are arranged along the circumference of the outer ring (1), the higher the temperature, the longer the movement distance of the sliding block (5), and the aperture of the whistle hole (7) positioned by the positioning hole (6) becomes smaller and smaller; The outer wall of the outer ring (1) is provided with a one-way air intake valve (17); The metal strip (8) is an arc-shaped structure, and the metal strip (8) is composed of a double layer of metal; The double-layer metal of the metal strip (8) is aluminum and steel, and the double-layer metal is bonded to each other.

2. A bearing for high temperature environment according to claim 1, characterized in that: A sliding groove (9) is provided on the inner wall of the through groove (4), and one end of the sliding block (10) is inserted into the interior of the sliding groove (9).

3. A bearing for high temperature environment according to claim 2, characterized in that: One end of the connecting hole (12) extends to the interior of the cooling groove (13), and the other end of the connecting hole (12) is connected to an external cooling water mechanism. A water outlet hole (15) is provided on the outer wall of the outer ring (1).

4. A bearing for high temperature environment according to claim 3, characterized in that: A sealing cover (16) is provided on the surface of the outer ring (1), and the sealing cover (16) seals the through groove (4).

5. The bearing for high temperature environment according to claim 4, characterized in that: The inner wall of the cooling groove (13) is provided with a plurality of support bars (14).

6. A manufacturing process for a bearing for a high temperature environment, applied to a bearing for a high temperature environment as claimed in claim 5, characterized in that: The following steps are involved: S1: preparing a mold of the outer ring (1), the inner ring (2), the steel column retainer structure (3) and the sealing cover (16), and preparing related components according to the mold. The outer ring (1), the inner ring (2), the steel column retainer structure (3) and the sealing cover (16) are made of high-temperature bearing steel as the main material, and are processed through forging, heat treatment and grinding processes; S2: The horizontal surface of the outer ring (1) is milled with a through groove (4), a slide groove (9) and a cooling groove (13). The whistle hole (7) and the connecting hole (12) are drilled on the arc surface of the outer ring (1). The connecting hole (12) passes through the interior of the cooling groove (13). The sliding block (5) and the slider (10) are welded and fixed. The positioning hole (6) and the water outlet hole (15) are drilled on the sliding block (5) and the slider (10) respectively. Finally, the mounting hole for mounting the one-way air intake valve (17) is drilled on the outer ring (1); S3: Install the welded sliding block (5) and slider (10) into the through groove (4) and the slide groove (9) respectively, install the metal strip (8), the two ends of the metal strip (8) are rotatably connected to the inner wall of the sliding block (5) and the through groove (4), and weld a plurality of support strips (14) to the inner wall of the cooling groove (13), and install the one-way air intake valve; S4: Weld the sealing cover (16) to the through groove (4) and assemble the outer ring (1), the inner ring (2) and the steel column retainer structure (3).

Images