High-temperature self-lubricating bearing and method for manufacturing same

Abstract

The application discloses a high-temperature self-lubricating bearing and a preparation method thereof, and belongs to the technical field of bearings. The bearing comprises an outer ring and an inner ring. The inner wall of the outer ring and the outer wall of the inner ring are provided with grooves, and rolling bodies are jointly assembled in the two grooves. Lubricating blocks are embedded on the inner walls of the two grooves through embedding grooves. The top of the outer ring is provided with an oil storage groove for storing lubricating oil. The dynamic lubricating film regeneration mechanism is realized through the oil storage groove, the lubricating blocks, an oil outlet assembly and an oil amount adjusting assembly. The lubricating blocks release microparticles to form a lubricating film in the process of friction. The lubricating oil stored in the oil storage groove is sprayed to the surface of the lubricating blocks through the capillary channel group, so that the dynamic cycle of "oil film rupture-regeneration repair" is realized, the long-term lubricating performance is maintained, the friction coefficient is reduced, and the direct contact wear of metal is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearings, in particular to a high-temperature self-lubricating bearing and a preparation method thereof. BACKGROUND

[0002] A bearing is a component that fixes and reduces the coefficient of friction of load in the process of mechanical transmission, or can be said to be a component that fixes the center position of the shaft and reduces the coefficient of friction in the process of power transmission when other machine parts move relative to each other on the shaft, and its lubrication performance directly affects the service life and operation stability of the equipment.

[0003] In a high-temperature industrial scene, the traditional bearing lubrication faces multiple challenges: first, the conventional lubricating oil is easy to oxidize and decompose in a high-temperature environment, resulting in failure of the lubricating film, causing metal direct contact friction and accelerating bearing wear; second, although solid lubricants (such as graphite) can release microparticles to form a lubricating film through interlayer sliding or thermal expansion, the lubrication performance is easy to decrease due to water loss in a high-temperature dry environment. SUMMARY

[0004] The purpose of the present application is to solve the problem that the conventional lubricating oil is easy to oxidize and decompose in a high-temperature environment, resulting in failure of the lubricating film, causing metal direct contact friction and accelerating bearing wear, and a high-temperature self-lubricating bearing and a preparation method thereof are proposed.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A high-temperature self-lubricating bearing, comprising an outer ring and an inner ring, the inner wall of the outer ring and the outer wall of the inner ring are both provided with a groove, and a rolling body is jointly assembled in the two grooves, a lubricating block is embedded on the inner wall of the two grooves through an embedded groove, and the top of the outer ring is provided with a lubricating oil storage groove;

[0007] An oil outlet assembly is assembled on the inner wall of the oil storage groove through an oil outlet groove, the lubricating oil entering the oil outlet groove is sprayed to the surface of the lubricating block through a capillary channel group formed in the outer ring to supplement the lubricating film;

[0008] An oil amount adjusting assembly is assembled on the outer wall of the outer ring, the oil amount adjusting assembly comprises a memory spring assembled on both sides of the outer ring, and the position of the valve plate is adjusted through a guide piece assembled on one end of the memory spring to control the communication state between the capillary channel group and the inner cavity of the oil outlet groove in high-temperature and low-temperature environments.

[0009] Further description of the above technical scheme:

[0010] The middle part of the inner wall of the oil outlet groove is fixed with a partition plate, the inner cavity of the oil outlet groove is sequentially divided into a left cavity and a right cavity from left to right through the partition plate, and the two valve plates are respectively slidably assembled in the left cavity and the right cavity.

[0011] As a further description of the above technical solution:

[0012] The capillary channel group includes two groups of upper capillary channels and two groups of lower capillary channels, the upper capillary channels and the lower capillary channels are evenly divided into two groups, and are respectively distributed on both sides of the outer ring, and the upper capillary channels and the lower capillary channels are communicated with the oil outlet groove.

[0013] As a further description of the above technical solution:

[0014] The top and the bottom of the two side walls of the inlay groove are respectively provided with a first spraying channel and a second spraying channel communicated with the upper capillary channel and the lower capillary channel.

[0015] As a further description of the above technical solution:

[0016] The two sides of the outer wall of the outer ring are provided with assembly holes, the memory spring is mounted in the assembly hole, one end of the assembly hole and the top of the oil storage groove are respectively fixed with a side sealing block and an upper sealing plate, and the middle part of the outer wall of the outer ring, the side sealing block and the upper sealing plate are provided with guide grooves, and the guide grooves are provided with sealing rings.

[0017] As a further description of the above technical solution:

[0018] The guide includes a guide block slidably mounted in the assembly hole, one end of the guide block is fixed with a guide rope, one end of the guide rope is sequentially penetrated through the side sealing block and the upper sealing plate and connected with the valve plate.

[0019] As a further description of the above technical solution:

[0020] The pulling force generated by the memory spring in the compressed state on the guide block is greater than the gravity of the lubricating oil in the oil storage groove on the valve plate to drive it to move downward.

[0021] A preparation method of a high-temperature self-lubricating bearing, comprising the following steps:

[0022] Step one, outer ring and inner ring processing: a ring-shaped groove is opened in the inner wall of the outer ring and the outer wall of the inner ring by using a precision machining process, and an inlay groove is opened in the inner wall of the groove by laser engraving;

[0023] Step two, lubrication system construction: an oil storage groove is opened at the top of the outer ring, and an oil outlet groove is opened in the inner bottom wall of the oil storage groove, the bottom of the oil outlet groove is communicated with the first spraying channel and the second spraying channel at the top of the inlay groove through a capillary channel group;

[0024] The double valve plate assembly is assembled in the oil outlet groove, the valve plate is vertically slidably sealed through the limiting sliding groove, and it is ensured that the lubricating oil only flows into the capillary channel set when the valve plate moves downward;

[0025] Step three, oil amount adjusting assembly assembly: assembly holes are formed on both sides of the outer ring, memory springs are installed in the assembly holes, the memory springs need to be pre-trained for high temperature phase change, it is ensured that the memory springs are in a compressed state at normal temperature and gradually recover to push the guide blocks to move at high temperature;

[0026] The end of the memory spring is connected with the top of the valve plate through the guide, the guide rope needs to be made of high-temperature-resistant fiber material, and it is ensured that the guide rope does not melt or deform at a temperature above ℃;

[0027] Step four, overall assembly: the outer ring, the inner ring and the rolling body and the retainer are assembled to form a bearing, and a sealing element is assembled to ensure the sealing property of the bearing.

[0028] As described above, the beneficial effects of the present application are as follows:

[0029] The oil storage groove, the lubricating block, the oil outlet assembly and the oil amount adjusting assembly are arranged, the dynamic lubricating film regeneration mechanism is realized, the lubricating block releases particles to form a lubricating film in friction, the lubricating oil stored in the oil storage groove is sprayed to the surface of the lubricating block through the capillary channel set, the dynamic cycle of 'oil film rupture-repair' is realized, the long-term lubricating property is maintained, the friction coefficient is reduced, and the direct contact wear of metal is reduced;

[0030] Meanwhile, the memory spring automatically adjusts the position of the valve plate according to temperature change, the memory spring gradually contracts and tightens the guide at low temperature, the valve plate is gradually closed to reduce the spraying amount of lubricating oil or stop spraying to reduce the starting resistance, the memory spring restores and relaxes the guide at high temperature, the valve plate moves downward to gradually open the upper capillary channel and the lower capillary channel, the spraying amount of lubricating oil is increased, the lubricating film is supplemented, and the high-temperature oxidation wear is reduced;

[0031] The memory springs are independently assembled on both sides of the outer ring, the temperature difference on both sides is adapted, the dynamic adjustment of the oil outlet amount on both sides is realized through the difference between the expansion and contraction degrees of the memory springs on both sides, and the excessive wear of the lubricating block on one side is avoided;

[0032] In combination, the lubricating oil replaces the moisture to provide a lubricating medium in a high-temperature dry environment, the dependence of the lubricating block on the environmental humidity is reduced, and the lubricating property is maintained stable. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The structure of the outer ring after being partially cut open is shown;

[0034] Figure 2 The structure of the outer ring after being partially cut open is shown; Figure 1 The enlarged view of A in the outer ring is shown;

[0035] Figure 3 A position distribution diagram of the capillary channel group is shown according to an embodiment of the present application;

[0036] Figure 4 A structure diagram of the capillary channel group is shown according to an embodiment of the present application; Figure 3 An enlarged view of B in the middle;

[0037] Figure 5 A structure diagram of the outer ring after being split in half is shown according to an embodiment of the present application;

[0038] Figure 6 An enlarged view of C in the middle is shown according to an embodiment of the present application; Figure 5 An enlarged view of C in the middle is shown according to an embodiment of the present application;

[0039] Figure 7 An enlarged view of D in the middle is shown according to an embodiment of the present application; Figure 5 An enlarged view of D in the middle is shown according to an embodiment of the present application;

[0040] Figure 8 A structure diagram of the whole after being split is shown according to an embodiment of the present application;

[0041] Figure 9 An enlarged view of E in the middle is shown according to an embodiment of the present application; Figure 8 An enlarged view of E in the middle is shown according to an embodiment of the present application;

[0042] Figure 10 A whole diagram is shown according to an embodiment of the present application;

[0043] Figure 11 A partial split diagram is shown according to an embodiment of the present application.

[0044] Legend:

[0045] 10, outer ring; 11, inner ring; 12, groove; 13, rolling body; 14, oil storage groove; 15, oil outlet groove;

[0046] 20, lubricating block;

[0047] 30, oil outlet assembly; 31, valve plate; 32, capillary channel group; 321, upper capillary channel; 322, lower capillary channel; 323, first spraying channel; 324, second spraying channel; 33, partition plate;

[0048] 40, oil amount adjusting assembly; 41, assembly hole; 42, memory spring; 43, guide; 431, guide block; 432, guide rope; 44, sealing ring. DETAILED DESCRIPTION

[0049] With reference to the drawings and embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0050] As shown in Figure 1 , Figure 11 The present application provides:

[0051] A high-temperature self-lubricating bearing, comprising an outer ring 10 and an inner ring 11, the inner wall of the outer ring 10 and the outer wall of the inner ring 11 are both provided with a groove 12, and a rolling element 13 is assembled in the two grooves 12, preferably, a retainer is assembled on the rolling element 13, and a sealing element is assembled in the inner cavity formed between the outer ring 10 and the inner ring 11, for sealing the outer ring 10 and the inner ring 11, to prevent external particulate matter from entering the inside of the bearing during operation, and a lubricating block 20 is embedded on the inner wall of each of the two grooves 12 by opening an inlay groove, preferably, the lubricating block 20 is a graphite solid lubricant, which releases microparticles by interlayer sliding or thermal expansion during friction, and the microparticles are transferred to the surface of the rolling element 13 to form a low-shear-strength solid lubrication film, which isolates metal direct contact and reduces the friction coefficient, and during the movement of the rolling element 13, the lubricating block 20 continuously supplements the lubrication film to form a dynamic cycle of "oil film rupture-repair", thereby maintaining long-term lubrication performance, and the top of the outer ring 10 is provided with an oil storage groove 14 for storing lubricating oil.

[0052] As shown in Figure 1 , Figure 2 and Figure 9 , an oil outlet assembly 30 is assembled on the inner wall of the oil storage groove 14 by opening an oil outlet groove 15, the oil outlet assembly 30 comprises two valve plates 31, and the lubricating oil entering the oil outlet groove 15 is sprayed onto the surface of the lubricating block 20 through the capillary channel group 32 formed in the outer ring 10 to supplement the lubrication film;

[0053] A partition plate 33 is fixed to the middle of the inner wall of the oil outlet groove 15, the inner cavity of the oil outlet groove 15 is divided into a left chamber and a right chamber from left to right by the partition plate 33, and the two valve plates 31 are slidingly assembled in the left chamber and the right chamber, respectively, specifically, a limiting sliding groove is opened on both sides of the partition plate 33, and a limiting sliding block is arranged on the outer wall of the valve plate 31 to match the limiting sliding groove, so that the valve plate 31 can only slide up and down along the limiting sliding groove, and it is worth noting that the inner walls of the left chamber and the right chamber, the valve plate 31 and the limiting sliding block are in a sealed state, but the up and down sliding of the valve plate 31 is not affected.

[0054] As shown in Figure 2 , Figure 3 and Figure 4As shown, the capillary channel group 32 includes two groups of upper capillary channels 321 and two groups of lower capillary channels 322, the upper capillary channels 321 and the lower capillary channels 322 are evenly divided into two groups and are distributed on both sides of the outer ring 10, and the upper capillary channels 321 and the lower capillary channels 322 are connected with the oil outlet groove 15;

[0055] The top and bottom of the two side walls of the inlaid groove are respectively provided with a first spraying channel 323 and a second spraying channel 324 connected with the upper capillary channel 321 and the lower capillary channel 322, preferably, a one-way valve is arranged in the outlet end of the first spraying channel 323 and the second spraying channel 324, which is used to ensure one-way spraying of lubricating oil and prevent external contaminants from entering, in particular, the positions corresponding to the first spraying channel 323 and the second spraying channel 324 of the lubricating block 20 are concave inward, but the degree of concave is small, only to ensure that the lubricating block 20 has a slight gap between the two side walls of the inlaid groove in this area, so that the lubricating oil can be smoothly sprayed out through the spraying channel.

[0056] As shown in Figure 1 , Figure 5 , Figure 6 and Figure 7 , the outer wall of the outer ring 10 is provided with an oil amount adjusting assembly 40, the oil amount adjusting assembly 40 includes memory springs 42 arranged on both sides of the outer ring 10, in particular, the memory springs 42 are made of shape memory alloy, and the memory springs 42 gradually contract at low temperature (room temperature) and gradually recover at high temperature, the position of the valve plate 31 is adjusted by a guide 43 arranged at one end of the memory spring 42, so as to control the connection state between the capillary channel group 32 and the inner cavity of the oil outlet groove 15 in high and low temperature environments;

[0057] Both sides of the outer wall of the outer ring 10 are provided with assembly holes 41, the memory springs 42 are installed in the assembly holes 41, one end of the assembly hole 41 and the top of the oil storage groove 14 are respectively fixed with a side sealing block and an upper sealing plate, and the middle part of the outer wall of the outer ring 10, the side sealing block and the upper sealing plate are provided with guide grooves, and the guide grooves are sleeved with sealing rings 44.

[0058] As shown in Figure 6 , Figure 7 and Figure 9 , the guide 43 includes a guide block 431 slidingly installed in the assembly hole 41, one end of the guide block 431 is fixed with a guide rope 432, one end of the guide rope 432 penetrates the side sealing block and the upper sealing plate in sequence and is connected with the valve plate 31, in particular, the middle part of the inner wall of the sealing ring 44 is provided with a ring groove corresponding to the guide rope 432, through the ring groove, the guide rope 432 can be limited between the guide groove and the sealing ring 44, and at the same time, the ring groove can ensure that the guide rope 432 can move smoothly without affecting it;

[0059] The pulling force generated by the memory spring 42 in the compressed state on the guide block 431 is greater than the gravity of the lubricating oil in the oil storage groove 14 on the valve plate 31 to drive it to move downward. Specifically, when the memory spring 42 is in the compressed state, the valve plate 31 is at the top of the inner cavity of the oil outlet groove 15. In this state, the lubricating oil does not enter the oil outlet groove 15. When the temperature gradually rises, the memory spring 42 gradually expands and recovers. During this process, the end of the memory spring 42 gradually pushes the guide block 431 to move outward, thereby gradually relaxing the guide rope 432. Under the action of the gravity of the lubricating oil in the oil storage groove 14 and the gravity of the valve plate 31 itself, the valve plate 31 gradually moves downward during the process, gradually exposing the inlet of the upper capillary channel 321. At this time, the lubricating oil entering the oil outlet groove 15 will enter the upper capillary channel 321, and then be sprayed onto the lubricating block 20 in the outer ring 10 through the first spraying channel 323 (the lubricating oil sprayed under the rolling of the rolling body 13 will gradually act on the lubricating block 20 on the inner ring 11), and then cooperate with the lubricating block 20 to realize double lubrication of the rolling body 13, and avoid the lack of water in the lubricating block 20 after the temperature rises, which leads to lubrication failure. During the process, the lubricating oil can replace the water to provide lubricating medium, reducing the dependence of the lubricating block 20 on the environmental humidity;

[0060] At the same time, after the temperature continues to rise, the memory spring 42 completely expands and recovers, which further relaxes the guide rope 432. At this time, the lubricating block 20 will further move downward to expose the inlet of the lower capillary channel 322. At this time, the lubricating oil will be sprayed through the upper capillary channel 321 and the lower capillary channel 322 to increase the oil amount under high temperature. Through the solid-liquid complementary lubrication mechanism: the lubricating block provides basic friction reduction protection, and the lubricating oil forms a stable oil film under high temperature to inhibit the secondary wear of graphite wear particles;

[0061] The dynamic oil spraying can maintain the thickness of the lubricating film, reduce the oxidation wear under high temperature and the starting resistance under low temperature (the lubricating block 20 may be oxidized or the lubricating film may be thinned under high temperature environment, at which time increasing the amount of lubricating oil sprayed can supplement the lubricating film to reduce friction and wear; reducing the amount of oil sprayed under low temperature environment can avoid the influence of lubricating oil on starting), and at the same time, due to the different proximity of the two sides of the outer ring 10 to the heat source, a temperature difference will occur between the two sides. Under this condition, the memory springs 42 on both sides expand or contract to different degrees, so that the oil outlet amounts on both sides are different, and then the lubricating blocks 20 on both sides of the outer ring 10 are sprayed to different degrees to realize dynamic oil spraying on both sides, so as to avoid the different wear degrees of the lubricating blocks 20 on both sides.

[0062] Specifically, the high-temperature self-lubricating bearing in the working / using state:

[0063] 1. Installation and initial setting: Assemble the outer ring 10, inner ring 11, lubricating block 20, rolling body 13 and retainer, ensure that the seal effectively seals the inner cavity between the outer ring 10 and the inner ring 11, and inject an appropriate amount of lubricating oil into the oil storage groove 14;

[0064] 2. Low temperature environment operation: At low temperature, the memory spring 42 is in a contracted state, the valve plate 31 is pulled to the top of the oil outlet groove 15 through the guide 43 (including the guide block 431 and the guide rope 432), the upper capillary passage 321 and the lower capillary passage 322 are closed, and no oil spraying is performed in this state. When the temperature rises slightly, the valve plate 31 gradually moves downward to partially open the upper capillary passage 321, and at this time the amount of lubricating oil sprayed is small;

[0065] 3. High temperature environment operation: During the temperature rise process, the memory spring 42 gradually recovers, the guide rope 432 is relaxed, and the valve plate 31 moves downward under the action of the gravity of the lubricating oil and its own gravity. First, the upper capillary passage 321 is completely opened, the lubricating oil is sprayed to the lubricating block 20 of the outer ring 10 through the first spraying passage 323, and is rolled to the lubricating block 20 of the inner ring 11 through the rolling body 13, forming double lubrication. When the temperature continues to rise, the valve plate 31 further moves downward to gradually open the lower capillary passage 322, increase the amount of lubricating oil sprayed, and maintain the thickness of the lubricating film;

[0066] 4. Temperature difference adaptive adjustment: When there is a temperature difference between the two sides of the outer ring 10, the memory springs 42 on the two sides expand / contract to different degrees, the positions of the valve plates 31 on the two sides are independently adjusted through the guide 43, the difference in oil outlet amount on the two sides is realized, and uneven lubrication is avoided;

[0067] 5. Daily maintenance: Regularly check the sealing performance of the seal to ensure that external particulate matter does not invade; monitor the amount of lubricating oil in the oil storage groove 14 and supplement it in time; and observe the wear condition of the lubricating block 20 and replace it if necessary.

[0068] A preparation method of a high-temperature self-lubricating bearing, comprising the following steps:

[0069] Step one, outer ring 10 and inner ring 11 processing: using precision machining process to open annular groove 12 on the inner wall of outer ring 10 and the outer wall of inner ring 11, and opening inlay groove on the inner wall of groove 12 by laser engraving;

[0070] Step two, lubricating system construction: opening oil storage groove 14 on the top of outer ring 10, and opening oil outlet groove 15 on the inner bottom wall of oil storage groove 14, and the bottom of oil outlet groove 15 is communicated with the first spraying passage 323 and the second spraying passage 324 at the top of inlay groove through capillary passage group 32;

[0071] Assembling double valve plate 31 assembly in oil outlet groove 15, valve plate 31 realizes vertical sliding sealing through limiting sliding groove, ensuring that lubricating oil only flows into capillary passage group 32 when valve plate 31 moves downward;

[0072] Step three, oil volume adjusting assembly 40 assembly: two sides of the outer ring 10 opening assembly hole 41, the installation of shape memory alloy memory spring 42 in the assembly hole 41, memory spring 42 need to be pre high temperature phase change training, ensure that at room temperature in the compressed state, high temperature gradually restored to push the guide block 431 movement;

[0073] The end of the memory spring 42 is connected to the top of the valve plate 31 through the guide 43, and the guide rope 432 needs to be made of high-temperature-resistant fiber material to ensure that it does not melt or deform at a high temperature above 200°C;

[0074] Step four, overall assembly: the outer ring 10, the inner ring 11 and the rolling body 13, the retainer are assembled to form a bearing, and the sealing element is assembled to ensure the sealing property of the bearing.

[0075] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high-temperature self-lubricating bearing comprising an outer ring (10) and an inner ring (11), the inner wall of the outer ring (10) and the outer wall of the inner ring (11) are each provided with a groove (12), and a rolling element (13) is jointly fitted in the two grooves (12), characterized in that, Two inner walls of the grooves (12) are embedded with lubricating blocks (20) through embedding grooves, and the top of the outer ring (10) is stored with lubricating oil through oil storage grooves (14); An oil outlet assembly (30) is assembled on the inner wall of the oil storage groove (14) through an oil outlet groove (15), the oil outlet assembly (30) comprises two valve plates (31), and the lubricating oil entering the oil outlet groove (15) is sprayed to the surface of the lubricating block (20) through the capillary channel group (32) formed in the outer ring (10) to supplement the lubricating film; An oil amount adjusting assembly (40) is assembled on the outer wall of the outer ring (10), the oil amount adjusting assembly (40) comprises memory springs (42) assembled on both sides of the outer ring (10), and the position of the valve plate (31) is adjusted through a guide (43) assembled on one end of the memory spring (42) to control the communication state between the capillary channel group (32) and the inner cavity of the oil outlet groove (15) in high and low temperature environments.

2. A high temperature self-lubricating bearing according to claim 1, wherein The middle part of the inner wall of the oil outlet groove (15) is fixed with a partition plate (33), the inner cavity of the oil outlet groove (15) is sequentially divided into a left chamber and a right chamber through the partition plate (33) from left to right, and the two valve plates (31) are respectively slidingly assembled in the left chamber and the right chamber.

3. A high temperature self-lubricating bearing according to claim 1, wherein The capillary channel group (32) comprises two groups of upper capillary channels (321) and two groups of lower capillary channels (322), the upper capillary channels (321) and the lower capillary channels (322) are equally divided into two groups and are respectively distributed on both sides of the outer ring (10), and the upper capillary channels (321) and the lower capillary channels (322) are communicated with the oil outlet groove (15).

4. A high temperature self-lubricating bearing according to claim 3, wherein The top and the bottom of the two side walls of the embedding groove are respectively provided with a first spraying channel (323) and a second spraying channel (324) communicated with the upper capillary channel (321) and the lower capillary channel (322).

5. The high temperature self-lubricating bearing of claim 1, wherein, Both sides of the outer wall of the outer ring (10) are provided with assembly holes (41), the memory springs (42) are installed in the assembly holes (41), one end of the assembly hole (41) and the top of the oil storage groove (14) are respectively fixed with a side sealing block and an upper sealing plate, and the middle part of the outer wall of the outer ring (10), the side sealing block and the upper sealing plate is provided with a guide groove, and a sealing ring (44) is sleeved in the guide groove.

6. A high temperature self-lubricating bearing according to claim 5, wherein, The guide (43) comprises a guide block (431) slidingly installed in the assembly hole (41), one end of the guide block (431) is fixed with a guide rope (432), and one end of the guide rope (432) is connected with the valve plate (31) after penetrating the side sealing block and the upper sealing plate in sequence.

7. A high temperature self-lubricating bearing according to claim 6, wherein The pulling force generated by the memory spring (42) on the guide block (431) in the compressed state is greater than the gravity of the lubricating oil in the oil storage groove (14) on the valve plate (31) to drive it to move downward.

8. A method of producing a high-temperature self-lubricating bearing according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: Step one, outer ring (10) and inner ring (11) processing: adopting a precise machining process to open annular grooves (12) on the inner wall of the outer ring (10) and the outer wall of the inner ring (11), and opening embedding grooves on the inner wall of the groove (12) through laser engraving; Step two, lubrication system construction: the top of the outer ring (10) is provided with an oil storage groove (14), and an oil outlet groove (15) is formed in the bottom wall of the oil storage groove (14), and the bottom of the oil outlet groove (15) is communicated with the first spray channel (323) and the second spray channel (324) at the top of the inlay groove through the capillary channel group (32); The double valve plate (31) assembly is assembled in the oil outlet groove (15), the valve plate (31) is vertically slidably sealed through the limiting sliding groove, so that the lubricating oil only flows into the capillary channel group (32) when the valve plate (31) moves downward; Step three, oil amount adjusting assembly (40) assembly: assembly holes (41) are formed on both sides of the outer ring (10), and shape memory alloy memory springs (42) are installed in the assembly holes (41), the memory springs (42) need to be pre-trained at high temperature to ensure that they are in a compressed state at room temperature and gradually recover to push the guide block (431) to move at high temperature; The end of the memory spring (42) is connected with the top of the valve plate (31) through the guide (43), and the guide rope (432) is made of high-temperature resistant fiber material to ensure that it does not melt or deform at a temperature above 200 DEG C; Step four, overall assembly: the outer ring (10), the inner ring (11) and the rolling body (13) and the retainer are assembled to form a bearing, and a sealing element is assembled to ensure the sealing property of the bearing.

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