Embedded solid lubrication bearing and preparation method thereof

Abstract

The invention discloses an embedded solid lubrication bearing and a preparation method thereof, and relates to the field of bearings, the embedded solid lubrication bearing comprises a base body and a solid lubricant, an outer sleeve is arranged on the outer wall of the base body, an oil supplementing mechanism is arranged in the outer sleeve, an extrusion groove is formed in the outer sleeve, the oil supplementing mechanism is communicated with the extrusion groove, and the solid lubricant is arranged in the extrusion groove. Mounting grooves are formed in the base body and the outer sleeve and used for insertion of a solid lubricant. The outer sleeve is arranged on the outer side of the base body, the oil supplementing mechanism is arranged in the outer sleeve, the oil supplementing mechanism squeezes lubricating oil into the squeezing groove along with temperature rise of the base body, the lubricating oil enters the positioning groove communicating with the squeezing groove, a solid lubricant is squeezed forwards, and it is guaranteed that the solid lubricant can make contact with a friction surface; the solid lubrication bearing has a lubrication function all the time, and after the solid lubricant is completely consumed, the lubricating oil enters the friction surface to carry out emergency lubrication, so that the situation that the solid lubrication bearing loses efficacy in lubrication is prevented.

Description

Technical Field

[0001] The present invention relates to the field of bearings, and specifically to an inlaid solid lubricating bearing and a preparation method thereof. Background Art

[0002] The inlaid solid lubricating bearing is a high-performance solid lubricating product in which graphite or MoS2 solid lubricant is inlaid on the matrix of high-strength brass (CuZn24AL6). It breaks through the limitation of general bearings relying on oil film lubrication. During use, through frictional heat, the solid lubricant rubs against the shaft, forming excellent lubrication conditions with both oil and powder coexisting.

[0003] As the friction process continues, the solid lubricating material embedded in the solid lubricating bearing can continuously replenish the friction surface, enabling the lubrication performance to be continuously maintained. Even under continuous operation or extremely poor lubrication conditions, a stable lubrication effect can be maintained.

[0004] However, the solid lubricating material will be consumed during the friction process. And in some working environments with large loads, the faster the lubricant is extruded, the consumption rate will increase significantly, and ultimately it may lead to a deterioration or even failure of the lubrication effect of the inlaid solid lubricating bearing. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide an inlaid solid lubricating bearing and a preparation method thereof to solve the technical problem that the lubrication effect of a general inlaid solid lubricating bearing may deteriorate or even fail after long-term operation.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An inlaid solid lubricating bearing, including a matrix and a solid lubricant. An outer sleeve is provided on the outer wall of the matrix. An oil replenishing mechanism is provided inside the outer sleeve. An extrusion groove is opened inside the outer sleeve. The oil replenishing mechanism is communicated with the extrusion groove. Installation grooves are opened inside both the matrix and the outer sleeve for inserting the solid lubricant. A positioning groove is opened at one end of the installation groove on the inner wall of the extrusion groove.

[0007] The present invention is further provided that the oil replenishing mechanism includes a lubricating oil groove, an expansion oil groove, an elastic membrane, and a connecting column. A lubricating oil groove and an expansion oil groove are opened inside the outer sleeve. The lubricating oil groove and the expansion oil groove are separated by an elastic membrane. The lubricating oil groove is communicated with the extrusion groove through a connecting column.

[0008] The present invention is further provided that an oil outlet hole is opened at one end of the connecting column, and a one-way oil valve is installed at the other end of the connecting column.

[0009] The present invention is further provided that the contact inner wall between the outer sleeve and the matrix is brass.

[0010] The present invention is further configured such that a plurality of air grooves are provided inside the outer sleeve. The air grooves are located between the oil replenishing mechanism and the extrusion groove. A plurality of one-way air valves are installed at one end of the outer sleeve. The one-way air valves communicate the air grooves with the outside. A plurality of air bags are provided on the inner wall of the air grooves close to the base body.

[0011] The present invention is further configured such that a pressure sensor is installed inside the extrusion groove.

[0012] The present invention is further configured such that the inner parts of the lubricating oil groove and the expansion oil groove are filled with lubricating oil and expansion oil respectively, and the inside of the extrusion groove is filled with lubricating oil.

[0013] A preparation method of an inlaid solid lubricating bearing includes the following steps:

[0014] Step 1: Prepare a base body using high-strength brass and an outer sleeve using bearing steel. The inner wall of the outer sleeve is made by welding brass and low-carbon steel.

[0015] Step 2: Punch and set an extrusion groove, a mounting groove, a positioning groove, and air grooves inside the outer sleeve by welding, separate the lubricating oil groove and the expansion oil groove with an elastic membrane, install air bags inside the air grooves, and install one-way air valves at the connection between the air grooves and the outside.

[0016] Step 3: Prepare a connecting column using bearing steel, punch a hole at one end and install a one-way oil valve at the other end, insert the connecting column into the outer sleeve, connect the lubricating oil groove and the extrusion groove, and install a pressure sensor inside the extrusion groove.

[0017] Step 4: Complete the installation by welding and combining the outer sleeve and the base body.

[0018] In summary, the present invention mainly has the following beneficial effects: By providing an outer sleeve outside the base body and an oil replenishing mechanism inside the outer sleeve, the present invention squeezes the lubricating oil into the extrusion groove as the temperature of the base body rises, and the lubricating oil enters the positioning groove connected to the extrusion groove, squeezing the solid lubricant forward to ensure that the solid lubricant can contact the friction surface, so that the solid lubricating bearing always has a lubricating function. And after the solid lubricant is consumed, the lubricating oil will enter the friction surface for emergency lubrication to prevent the lubrication failure of the solid lubricating bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is a first cross-sectional view of the present invention;

[0021] Figure 3 is a second cross-sectional view of the present invention;

[0022] Figure 4The third cross-sectional view of the present invention;

[0023] Figure 5 For the present invention Figure 3 Enlarged view of the structure at position A.

[0024] In the figure: 1, matrix; 2, solid lubricant; 3, outer sleeve; 4, mounting groove; 5, lubricating oil groove; 6, expansion oil groove; 7, elastic membrane; 8, connecting column; 9, one-way oil valve; 10, oil outlet hole; 11, extrusion groove; 12, air groove; 13, one-way air valve; 14, airbag; 15, positioning groove. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0026] An inlaid solid lubricating bearing and a preparation method thereof, as Figures 1-5 shown, including a matrix 1 and a solid lubricant 2. A plurality of mounting grooves 4 are formed in the matrix 1, and the solid lubricant 2 is inserted into the inside of the mounting groove 4. When the matrix 1 is installed, the solid lubricant 2 will come into contact with the friction surface for lubrication work.

[0027] The inside of the outer sleeve 3 is provided with an oil replenishing mechanism. An extrusion groove 11 is formed inside the outer sleeve 3. The oil replenishing mechanism is communicated with the extrusion groove 11. Installation grooves 4 are formed inside both the base body 1 and the outer sleeve 3 for inserting the solid lubricant 2. A positioning groove 15 is formed at one end of the inner wall of the extrusion groove 11 corresponding to the installation groove 4. The oil replenishing mechanism includes a lubricating oil groove 5 and an expansion oil groove 6. The lubricating oil groove 5 and the expansion oil groove 6 are formed inside the outer sleeve 3 and are separated by an elastic membrane 7. The lubricating oil groove 5 is communicated with the extrusion groove 11 through a connecting column 8. Lubricating oil and expansion oil are filled in the lubricating oil groove 5 and the expansion oil groove 6 respectively. Lubricating oil is filled in the extrusion groove 11. The operation of the oil replenishing mechanism is realized by temperature. When the base body 1 is working and the temperature rises due to increased friction, it indicates that the lubricating effect of the solid lubricant 2 on the friction surface becomes poor, possibly because the solid lubricant 2 fails to be replenished to the friction surface in time. At this time, the temperature is conducted to the inside of the expansion oil groove 6, causing the expansion oil to expand. The expanding oil with a changed volume will squeeze the elastic membrane 7, causing the elastic membrane 7 to deform. The deformed elastic membrane 7 will squeeze the lubricating oil groove 5, squeezing the lubricating oil inside the lubricating oil groove 5 into the connecting column 8. Since the connecting column 8 is communicated with the extrusion groove 11, the lubricating oil will enter the extrusion groove 11 through the connecting column 8. Since the extrusion groove 11 is filled with lubricating oil, the lubricating oil entering the extrusion groove 11 will squeeze the original lubricating oil into the positioning groove 15 and the installation groove 4, and push the solid lubricant 2 in the installation groove 4 forward, enabling it to contact the friction surface and lubricate the friction surface. The lubricating oil serves to push the solid lubricant 2 forward.

[0028] Furthermore, when the solid lubricant 2 is consumed due to use, the temperature of the friction surface rises. The lubricating oil will still squeeze the original lubricating oil into the positioning groove 15 and the installation groove 4, but at this time, the lubricating oil will directly enter the friction surface to lubricate the friction surface emergently.

[0029] Meanwhile, an oil outlet hole 10 is formed at one end of the connecting column 8, and a one-way oil valve 9 is installed at the other end of the connecting column 8. Therefore, the lubricating oil entering the connecting column 8 only exits from the one-way oil valve 9 and through the oil outlet hole 10 and cannot return to the lubricating oil groove 5. A pressure sensor is installed inside the extrusion groove 11. In the initial state, the inside of the extrusion groove 11 is filled with lubricating oil, and the pressure value of the pressure sensor remains unchanged. When the lubricating oil enters the extrusion groove 11, the pressure value increases. When the lubricating oil has entered the friction surface for lubrication, the pressure will gradually decrease. At this time, the pressure sensor sends a signal indicating that the embedded solid lubricating bearing is about to fail, and the staff can replace it.

[0030] A plurality of air grooves 12 are formed inside the outer sleeve 3. The air grooves 12 are located between the oil replenishing mechanism and the extrusion groove 11. A plurality of one-way air valves 13 are installed at one end of the outer sleeve 3. The one-way air valves 13 connect the air grooves 12 with the outside. A plurality of air bags 14 are arranged on the inner wall of the air grooves 12 close to the base body 1. When the lubricating oil in the lubricating oil tank 5 enters the extrusion groove 11, the amount of lubricating oil in the lubricating oil tank 5 decreases. And due to the existence of the one-way oil valve 9, the atmospheric pressure changes. The outside air enters the air grooves 12 through the one-way air valves 13 and inflates the air bags 14. After the air bags 14 are inflated, they expand in the lubricating oil tank 5 and fill the lubricating oil tank 5. When the lubricating oil in the lubricating oil tank 5 decreases, if the temperature of the base body 1 rises, the expanded oil and the elastic membrane 7 will first squeeze the air bags 14. Only when the temperature continues to rise and the expanded oil expands in volume, the expanded oil and the elastic membrane 7 will squeeze the lubricating oil and squeeze the lubricating oil into the connecting column 8. This design can effectively reduce the situation that the device starts due to small-range temperature changes and squeezes the lubricating oil into the connecting column 8.

[0031] The inner contact wall between the outer sleeve 3 and the base body 1 is made of brass, which can effectively conduct the heat generated during the operation of the base body 1 to the expansion oil tank 6.

[0032] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A mosaic solid lubrication bearing, comprising a matrix (1) and a solid lubricant (2), characterized in that: An outer sleeve (3) is provided on the outer wall of the substrate (1). An oil replenishing mechanism is provided inside the outer sleeve (3). An extrusion groove (11) is formed inside the outer sleeve (3). The oil replenishing mechanism is communicated with the extrusion groove (11). Installation grooves (4) are formed inside both the substrate (1) and the outer sleeve (3) for inserting a solid lubricant (2). A positioning groove (15) is formed in the inner wall of the extrusion groove (11) at one end of the installation groove (4).

2. The inlaid solid lubricating bearing according to claim 1, characterized in that: The oil replenishing mechanism includes a lubricating oil groove (5), an expansion oil groove (6), an elastic membrane (7) and a connecting column (8). A lubricating oil groove (5) and an expansion oil groove (6) are formed inside the outer sleeve (3). The lubricating oil groove (5) and the expansion oil groove (6) are separated by the elastic membrane (7). The lubricating oil groove (5) is communicated with the extrusion groove (11) through the connecting column (8).

3. The inlaid solid lubricating bearing according to claim 2, wherein: An oil outlet hole (10) is formed at one end of the connecting column (8), and a one-way oil valve (9) is installed at the other end of the connecting column (8).

4. The inlaid solid lubricating bearing according to claim 1, wherein: The inner contact wall of the outer sleeve (3) and the substrate (1) is brass.

5. The inlaid solid lubricating bearing according to claim 1, characterized in that: A plurality of air grooves (12) are formed inside the outer sleeve (3). The air grooves (12) are located between the oil replenishing mechanism and the extrusion groove (11). A plurality of one-way air valves (13) are installed at one end of the outer sleeve (3). The one-way air valves (13) communicate the air grooves (12) with the outside. A plurality of air bags (14) are arranged on the inner wall of the air grooves (12) close to the substrate (1).

6. The inlaid solid lubricating bearing according to claim 1, wherein: A pressure sensor is installed inside the extrusion groove (11).

7. The inlaid solid lubricating bearing according to claim 2, characterized in that: The inner parts of the lubricating oil groove (5) and the expansion oil groove (6) are filled with lubricating oil and expansion oil respectively, and the inside of the extrusion groove (11) is filled with lubricating oil.

8. A preparation method of an inlaid solid lubrication bearing, which is applied to an inlaid solid lubrication bearing according to any one of claims 1-7, and is characterized in that: It includes the following steps: Step 1: Prepare the substrate (1) using high-strength brass, drill installation grooves (4) on the surface of the substrate (1), prepare the outer sleeve (3) using bearing steel, and the inner wall of the outer sleeve (3) is made by welding brass and low-carbon steel; Step 2: Set the extrusion groove (11), installation groove (4), positioning groove (15), air groove (12) inside the outer sleeve (3) by welding and drilling, separate the lubricating oil groove (5) and the expansion oil groove (6) with the elastic membrane (7), install air bags inside the air groove (12), and install one-way air valves (13) at the connection of the air groove (12) and the outside; Step 3: Prepare the connecting column (8) using bearing steel, drill a hole at one end, install a one-way oil valve (9) at the other end, insert the connecting column (8) into the outer sleeve (3), connect the lubricating oil groove (5) and the extrusion groove (11), and install a pressure sensor inside the extrusion groove (11); Step 4: Supplement the lubricating oil groove (5) and the expansion oil groove (6), and complete the installation after the welding combination of the outer sleeve (3) and the substrate (1).

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