A bearing housing structure for high-frequency hydraulic breakers with expandable heat dissipation area

Abstract

This utility model discloses a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area, comprising: an end cover with several circumferentially arranged first mounting holes on its edge, the end cover being fixedly mounted on a vibrating chamber by first bolts, the first bolts being disposed within the first mounting holes, and a groove on the surface of the end cover containing several annular heat dissipation fins; a flange disposed on the inner side of the end cover, the flange being inserted into the vibrating chamber using a liquid nitrogen cold assembly process, oil holes being provided on one opposite sidewall of the flange, the positions of the oil holes corresponding to the lubricating oil flow channels on the vibrating chamber, and several circumferentially arranged longitudinal oil grooves being provided on the inner sidewall of the flange; wherein, a spirally arranged oil guide groove is also provided on the inner wall of the flange, the oil guide groove connecting to the longitudinal oil grooves. Compared with the prior art, this utility model solves the problems of insufficient heat dissipation area and poor cooling effect of existing bearing cover surfaces.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency hydraulic breaker technology, and in particular to a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area. Background Technology

[0002] A high-frequency hydraulic breaker is a crushing device driven by a hydraulic motor and utilizing centrifugal force to generate excitation force. When the high-frequency hydraulic breaker is working, the hydraulic energy of the tunneling equipment is transmitted to the hydraulic motor, which drives the eccentric gear in the vibratory box to rotate, thereby generating a centrifugal force F. Its vertical component is a periodically changing disturbance force, which causes the shaft to generate radial forced vibration pressure. The vibration is then transmitted to the bucket teeth by the vibrator housing for crushing operations.

[0003] When a high-frequency shield rock machine tunnels using a high-frequency breaker hammer, the high-speed, high-load operation of the bucket teeth causes the bearings to rotate at high speed and the temperature to rise. Therefore, oil needs to be introduced for lubrication and heat dissipation to ensure the long-term stable operation of the bearings.

[0004] In the existing bearing lubrication and cooling system of high-frequency hydraulic breakers, the bearing cover is fixedly installed on the machine body, forming a sealed space to accommodate the bearing. Lubricating oil is circulated through inlet and outlet ports on the bearing cover, thereby cooling the bearing. However, the existing bearing cover has insufficient heat dissipation area and low heat dissipation efficiency, resulting in poor bearing cooling performance. Utility Model Content

[0005] The purpose of this invention is to provide a bearing housing structure for high-frequency hydraulic breakers with an expandable heat dissipation area, so as to solve the problems of insufficient heat dissipation area and poor cooling effect of existing bearing cover surfaces.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area, comprising:

[0007] The end cap has several first mounting holes arranged circumferentially on its edge. The end cap is fixed to the vibration box body by first bolts. The first bolts are set in the first mounting holes. The surface of the end cap has a groove, and several ring-shaped heat dissipation fins are arranged in the groove. The several ring-shaped heat dissipation fins are arranged concentrically.

[0008] The flange is located on the inner side of the end cap. The flange is inserted into the vibration box body through liquid nitrogen cold assembly process. Oil holes are provided on one opposite side wall of the flange. The position of the oil holes corresponds to the lubricating oil flow channel on the vibration box body. Several longitudinal oil grooves are arranged circumferentially on the inner side wall of the flange. The longitudinal oil grooves are arranged along the axial direction of the flange. One end of the oil hole extends to the bottom surface of the longitudinal oil groove.

[0009] The inner wall of the flange is also provided with spirally arranged oil guide grooves, which are connected to the longitudinal oil grooves.

[0010] As a further description of the above technical solution:

[0011] The end cover is also provided with several second mounting holes arranged circumferentially, the positions of which correspond to the outer ring of the bearing.

[0012] As a further description of the above technical solution:

[0013] A groove is provided on the inner side of the end cap.

[0014] As a further description of the above technical solution:

[0015] A nano-oleophobic coating is provided on the inner wall of the flange.

[0016] As a further description of the above technical solution:

[0017] The cross-section of the oil guide groove is arc-shaped.

[0018] As a further description of the above technical solution:

[0019] Four longitudinal oil grooves are arranged circumferentially on the inner sidewall of the flange.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] 1. In this utility model, the high-frequency breaker utilizes lubricating oil to cool and lubricate the bearing housing. Several ring-shaped heat dissipation fins on the outer side of the end cover create an uneven surface on the end cover, increasing the heat dissipation area by more than 30%, effectively improving the heat exchange effect of the end cover and increasing the cooling efficiency.

[0022] 2. In this utility model, after the lubricating oil enters the inner side of the flange of the bearing housing through the oil hole on one side, the longitudinal oil groove makes the oil hole and the bearing surface a certain distance apart, preventing the lubricating oil from directly impacting the bearing surface and facilitating the entry of the lubricating oil. At the same time, the spirally arranged oil guide groove on the inner wall of the flange can guide the flow of the lubricating oil, guide the oil to evenly cover the bearing surface, increase the heat exchange effect between the lubricating oil and the bearing, and further improve the cooling and heat dissipation effect of the bearing.

[0023] 3. In this utility model, the bearing housing includes an end cover and a flange, and the end cover and flange are integrally formed metal shells. The flange of the bearing housing achieves an interference fit with the vibration chamber through a liquid nitrogen cold assembly process, effectively preventing lubricating oil leakage. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the installation of a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area. Figure 1 .

[0026] Figure 2 A schematic diagram of the installation of a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area. Figure 2 .

[0027] Figure 3 A schematic diagram of a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area. Figure 1 .

[0028] Figure 4 A schematic diagram of a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area. Figure 2 .

[0029] Figure 5 This is a cross-sectional view of a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area.

[0030] Legend:

[0031] 1. End cap; 11. First mounting hole; 12. Annular heat dissipation fins; 13. Second mounting hole; 14. Groove; 2. Flange; 21. Oil hole; 22. Longitudinal oil groove; 23. Oil guide groove; 9. Vibration box. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0033] Please see Figure 1-5 This utility model provides a technical solution: a bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area, comprising:

[0034] The end cover 1 has several first mounting holes 11 arranged circumferentially on its edge. The end cover 1 is fixedly mounted on the vibration box 9 by a first bolt. The first bolt is set in the first mounting hole 11. The surface of the end cover 1 is provided with a groove. Several ring-shaped heat dissipation fins 12 are provided in the groove. The ring-shaped heat dissipation fins 12 are arranged concentrically.

[0035] Flange 2 is located on the inner side of end cap 1. Flange 2 is inserted into vibration box 9 by liquid nitrogen cold assembly process. Oil hole 21 is provided on one opposite side wall of flange 2. The position of oil hole 21 corresponds to the lubricating oil flow channel on vibration box 9. Several longitudinal oil grooves 22 are arranged circumferentially on the inner side wall of flange 2. The longitudinal oil grooves 22 are arranged along the axial direction of flange 2. One end of oil hole 21 extends to the bottom surface of longitudinal oil groove 22.

[0036] Among them, the inner wall of the flange 2 is also provided with a spirally arranged oil guide groove 23, which is connected to the longitudinal oil groove 22.

[0037] When the high-frequency hydraulic breaker uses lubricating oil to cool and lubricate the bearing housing, the several ring-shaped heat dissipation fins 12 on the outer side of the end cover 1 make the end cover 1 form an uneven surface, increasing the heat dissipation area by more than 30%, effectively improving the heat exchange effect of the end cover 1 and improving the cooling efficiency.

[0038] After the lubricating oil enters the inner side of the flange 2 of the bearing housing through the oil hole 21 on one side, the longitudinal oil groove 22 keeps the oil hole 21 at a certain distance from the bearing surface, preventing the lubricating oil from directly impacting the bearing surface and facilitating the entry of the lubricating oil. At the same time, the spirally arranged oil guide groove 23 on the inner wall of the flange 2 can guide the flow of the lubricating oil, guide the oil to evenly cover the bearing surface, increase the heat exchange effect between the lubricating oil and the bearing, and further improve the cooling and heat dissipation effect of the bearing.

[0039] The end cover 1 is also provided with several circumferentially arranged second mounting holes 13, the positions of which correspond to the outer ring of the bearing. The side wall of the outer ring of the bearing can seal the second mounting holes 13 to prevent lubricating oil leakage.

[0040] A groove 14 is provided on the inner side of the end cover 1 to reduce the contact between the inner side of the end cover 1 and the bearing and avoid friction.

[0041] Four longitudinal oil grooves 22 are arranged circumferentially on the inner wall of the flange 2. The four longitudinal oil grooves 22 are spaced 90° apart to temporarily store the lubricating oil and ensure the supply of lubricating oil.

[0042] Working principle: The bearing housing includes an end cover 1 and a flange 2, which are integrally formed metal shells. The flange 2 of the bearing housing is cold-assembled with liquid nitrogen (-270℃) to achieve an interference fit with the vibratory chamber 9, effectively preventing lubricating oil leakage. When the high-frequency breaker is working, the lubricating oil in the lubricating oil channel (oil inlet channel) on one side of the flange 2 inside the vibratory chamber 9 flows into the bearing housing through the oil hole 21. After contacting the bearing, the lubricating oil flows out through the oil hole 21 on the other side of the flange 2 and enters another lubricating oil channel (oil return channel) inside the vibratory chamber 9 to achieve oil circulation. Example 2

[0043] Based on the above embodiments, this embodiment further improves upon the following technical solution: a nano-oleophobic coating is provided on the inner wall of the flange 2, which effectively reduces oil residue on the surface during disassembly and cleaning of the bearing housing, making it easier to clean. Example 3

[0044] Based on the above embodiments, this embodiment further improves upon the following technical solution: the cross-section of the oil guide groove 23 is arc-shaped, which facilitates cleaning and effectively avoids oil residue.

[0045] Similarly, the longitudinal oil groove 22 also has a circular arc cross-section.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bearing housing structure for a high-frequency demolition hammer, which is capable of expanding a heat dissipation area, characterized by, include: The end cap has several first mounting holes arranged circumferentially on its edge. The end cap is fixedly mounted on the vibration box by first bolts. The first bolts are set in the first mounting holes. The surface of the end cap has a groove. Several rings of annular heat dissipation fins are arranged in the groove. The rings of annular heat dissipation fins are arranged concentrically. A flange is provided on the inner side of the end cap. The flange is inserted into the vibration box body by liquid nitrogen cold assembly process. An oil hole is provided on one opposite side wall of the flange. The position of the oil hole corresponds to the lubricating oil flow channel on the vibration box body. A plurality of longitudinal oil grooves are provided on the inner side wall of the flange. The longitudinal oil grooves are arranged along the axial direction of the flange. One end of the oil hole extends to the bottom surface of the longitudinal oil groove. The inner wall of the flange is provided with a spirally arranged oil guide groove, which is connected to the longitudinal oil groove.

2. The bearing housing structure for a high-frequency demolition hammer according to claim 1, wherein The end cap is also provided with a plurality of second mounting holes arranged circumferentially, the positions of which correspond to the outer ring of the bearing.

3. The bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area according to claim 1, characterized in that, A groove is provided on the inner side of the end cap.

4. The bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area according to claim 1, characterized in that, The inner wall of the flange is provided with a nano-oleophobic coating.

5. The bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area according to claim 1, characterized in that, The cross-section of the oil guide groove is arc-shaped.

6. The bearing housing structure for a high-frequency hydraulic breaker with expandable heat dissipation area according to claim 1, characterized in that, The inner wall of the flange is provided with four longitudinal oil grooves arranged in a circumferential direction.

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