Long life oil-free scroll compressor

Abstract

This utility model belongs to the field of compressors, specifically relating to a long-life oil-free scroll compressor, comprising: a frame, on which a stationary disc is mounted; a moving disc, mounted on one side of the stationary disc; a bushing, on which a moving main bearing is disposed, and a main crankshaft is also disposed on the bushing, the moving main bearing being sleeved on the main crankshaft, and a gasket being disposed on the inner side of the moving main bearing; the bushing is provided with a grease discharge component, a grease filling component, and a one-way valve. The inner ring of the moving main bearing uses a gasket, installed on the opposite side of the force, i.e., the loose side, increasing the diameter of the outer circle on this side, thereby reducing the clearance on this side. During operation, after thermal expansion, the clearance of the entire bearing is essentially zero or slightly excessive, allowing the rollers to roll fully, preventing slippage, and significantly increasing the bearing's bearing area, reducing raceway stress, and maximizing the overall bearing life.

Description

Technical Field

[0001] This utility model belongs to the field of compressors, specifically relating to a long-life oil-free scroll compressor. Background Technology

[0002] The main bearing design of existing oil-free scroll compressors has the following key problems:

[0003] 1. Bearing selection and installation defects

[0004] The main bearing uses cylindrical roller bearings (which can be installed separately). Although they have a high load-bearing capacity, the grease is prone to failure due to the high temperature of the compressor, especially when the bearing is large or at high speed.

[0005] When deep groove ball bearings are used as the main bearing, the installation clearance (inner or outer ring not locked) can cause slippage and temperature rise, further shortening their lifespan.

[0006] 2. Defects in the lubrication system

[0007] Specialized greases are expensive and have a short lifespan. The grease filling holes are complex to machine (requiring long oil holes for connection), and the grease drain port is located in the middle of the moving plate. Disassembling the stationary plate can easily damage precision and contaminate the oil-free environment. The machine main bearing is a sealed design, making grease replacement impossible, and its lifespan is insufficient at high temperatures.

[0008] 3. Thermal management and uneven load distribution

[0009] The main bearing is subjected to centrifugal force on one side, which exacerbates wear due to roller slippage; the difference in thermal expansion (between the bushing and the frame) leads to additional load and localized deterioration of lubrication.

[0010] Poor heat dissipation caused the bearing temperature to exceed 70°C, and the grease life decreased significantly with increasing temperature (halved for every 15°C).

[0011] 4. Structural design contradictions

[0012] Weight reduction of the main balance weight requires drilling compensation and enlarging its size; the grease application operation requires precise alignment, which is impractical.

[0013] In summary, existing technologies suffer from low reliability and difficult maintenance due to deficiencies in bearing selection, lubrication design, and thermal management. Utility Model Content

[0014] To overcome the shortcomings of existing technologies, this utility model provides a long-life oil-free scroll compressor. It solves the problems of the main bearing not using cylindrical roller bearings and being able to be installed separately. Although the load-bearing capacity is high, the grease is prone to high-temperature failure due to the high temperature of the compressor, especially when the size is large or the speed is high. Deep groove ball bearings slip and heat up due to installation clearance, which further shortens their life. Special grease is expensive and has a short life. The grease filling hole is complicated to process and requires long oil hole connection. The grease discharge port is designed in the middle of the moving plate. Disassembling and assembling the stationary plate can easily damage the precision and pollute the oil-free environment. The main bearing is a sealed design and the grease cannot be replaced. The grease life is insufficient at high temperatures.

[0015] This utility model provides a long-life oil-free scroll compressor, comprising:

[0016] A rack on which a static disk is mounted;

[0017] A movable plate, which is mounted on one side of the stationary plate and is located between the stationary plate and the frame;

[0018] A bushing is provided, which is installed on the side of the moving disc away from the stationary disc. A moving main bearing is provided on the bushing, and a main crankshaft is also provided on the bushing. The moving main bearing is sleeved on the main crankshaft. A gasket is provided on the inner side of the moving main bearing, and the gasket is located between the moving main bearing and the main crankshaft. A first bearing cover is provided on the bushing, and the first bearing cover is sleeved on the main crankshaft. A moving main bearing seat is provided on the bushing, and the moving main bearing is located inside the moving main bearing seat.

[0019] The bushing is provided with a grease discharge component, a grease filling component and a one-way valve, wherein the one-way valve is used to discharge the gas and grease generated by pressure when the bearing is heated;

[0020] The main crankshaft is equipped with solar heat sinks;

[0021] The main crankshaft is provided with a heat conduction channel for introducing coolant.

[0022] As an optimization of the above solution, the bushing is provided with at least three circumferentially distributed moving pair bearing seats, which are fixedly mounted on the bushing.

[0023] As an optimization of the above solution, the bushing is provided with at least three unloading grooves, which are located between the moving main bearing seat and the moving secondary bearing seat, or in the hole of the moving secondary bearing seat, and have an arc notch on the side near the center.

[0024] As an optimization of the above solution, the bushing and the moving pair bearing housing are designed separately. The moving pair bearing housing has two second planes and a second arc surface that serves as a transition between the two second planes. The two second planes are mirror images of the coaxial surface formed by the axis of the bushing and the axis of the moving pair bearing housing. The bushing has a first plane that mates with the second planes and a first arc surface that mates with the second arc surface. The moving pair bearing housing is fitted onto the bushing, and the moving pair bearing housing is provided with a moving pair bearing and a small crankshaft. The moving pair bearing is fitted onto the small crankshaft. The space between the second arc surface and the first arc surface is filled with compensating material to withstand a certain radial force. The second plane and the first plane are used to prevent rotation. When the bushing expands and contracts due to heat, the moving pair bearing housing can only move radially within the gap between it and the bushing. This design compensates for the displacement of the moving pair bearing housing when the bushing and the moving disc expand due to heat, or eliminates the deformation load caused by the expansion of the parts on the moving pair bearing housing. The bottom of the moving pair bearing housing is in contact with the bottom of the bearing hole of the bushing.

[0025] As an optimization of the above solution, the frame is provided with a frame air inlet and a frame air outlet, which are used to cool the main balance block. The frame is provided with a moving plate air inlet for the moving plate to enter the moving plate and a moving plate air outlet for the moving plate to exit the moving plate.

[0026] The static plate is provided with a static plate air inlet and a static plate air outlet.

[0027] A heat dissipation air inlet is provided on one side of the frame, which is used to dissipate heat from the solar heat sink.

[0028] The air inlet of the rack, the air inlet of the moving plate, the air inlet of the stationary plate, and the air inlet of the heat dissipation are all connected to the air inlet duct.

[0029] As an optimization of the above solution, the frame is provided with auxiliary bearings of the same number as the small crankshafts. The auxiliary bearings are sleeved on the end of the small crankshaft away from the moving bearing. The frame is also provided with a third bearing cover of the same number as the auxiliary bearings. The third bearing cover is sleeved on the small crankshaft. Bearing baffles are provided at both ends of the main bearing.

[0030] The frame is provided with a grease filling channel, which is connected to the main bearing and located between the two bearing baffles. A grease filling nozzle is provided on the grease filling channel.

[0031] The frame is provided with a grease draining channel, which is connected to the main bearing of the machine, and a grease draining plug is provided on the grease draining channel.

[0032] As an optimization of the above solution, a fan housing is installed on the frame, the fan housing is located on one side of the frame, the air inlet is located on one side of the fan housing, and the air inlet is detachably connected to the fan housing and the frame. A fan blade is installed on the main crankshaft, and the fan blade is located inside the fan housing.

[0033] The long-life oil-free scroll compressor provided by the above technical solution has the following beneficial effects:

[0034] 1. When the main bearing is located close to the center of the heat source of the moving disc, the bearing operates at high temperatures. Furthermore, grease lubrication makes precision difficult to guarantee. Existing cylindrical roller bearings suffer from high roller friction resistance, resulting in localized high temperatures in the grease-lubricated rollers. This makes both the grease and the bearing prone to damage. Ordinary greases cannot be used indiscriminately; even with special greases, the expected lifespan is often not achieved, affecting machine reliability. This invention uses ball bearings. Considering the load capacity, double-row angular contact ball bearings are preferred. This reduces friction, minimizes the impact on lubrication, and offers high adaptability to high temperatures, effectively ensuring the lifespan of both the grease and the bearing, guaranteeing machine reliability, reducing the overall machine failure rate, and allowing for a wider range of grease selection. The requirements for bearings are not as stringent as in the past when special bearings were used, providing a broader selection.

[0035] 2. The original cylindrical bearing of the main bearing has been replaced with a non-separable spherical bearing, such as a deep groove or angular contact bearing. The main bearing and the machine main bearing can be installed and used with interference fit on both the inner and outer rings.

[0036] 3. The inner and outer rings of the moving main bearing and the machine main bearing are simultaneously interference-fitted, which not only allows for installation but also reduces clearance and improves transmission precision.

[0037] 4. The main bearing of the machine adopts cylindrical bearings, which allows the shaft to extend or shorten to the right end when it expands or contracts with heat, ensuring that it does not extend or shorten to the moving side. This effectively ensures that the moving plate is not affected by external forces when heated or cooled, thus preventing issues with its force or accuracy.

[0038] 5. Ball bearings produce less noise and have better vibration resistance, especially in the smooth swing motion of the moving disc, where there is eccentric force or circumferential force, the effect is better.

[0039] 6. The main bearing adopts a convenient grease filling and grease draining design, which does not require disassembling the stationary plate or applying grease to the window and main balance block. Only the air duct needs to be disassembled, so that ordinary customers can operate and maintain it. The difficulty is not high, and the machine's accuracy will not be affected by the operator's skill level.

[0040] 7. Regarding the difficulty of adding and removing grease, ordinary grease can be used, but now it is possible to shorten the grease addition time and replace the lubricating grease, which is more conducive to ensuring the reliability of the machine.

[0041] 8. The grease replacement method involves feeding the grease from one end of the bearing and expelling it from the other end. This maximizes the application of new grease throughout the bearing and maximizes the removal of old grease. This method is far more effective than the previous method of expelling old grease from the bearing simultaneously. It ensures that the bearing is fully or almost entirely covered with new grease, thus extending the grease's lifespan and ultimately guaranteeing the bearing's lifespan.

[0042] 9. Instead of machining oil holes and oil passages on the main balance, the main balance is hollowed out, reducing the weight of the main balance block. This leads to an increase in the size of the main balance block to compensate for the weight loss from drilling.

[0043] 10. The inner ring of the main bearing uses shims, feeler gauges, etc., installed on the side opposite to the force direction, i.e. the loose side, so that the outer diameter of the inner ring increases on this side, thereby reducing the clearance on this side. When working, after thermal expansion, the clearance of the entire bearing is basically 0 or slightly interference, allowing the rollers to roll fully and avoiding slippage. The bearing's force-bearing area is greatly increased, the raceway stress is reduced, and the overall bearing life is maximized. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0046] Figure 2 This is a schematic diagram showing the installation of the fat-removing component and the fat-adding component of this utility model;

[0047] Figure 3 for Figure 2 A partial cross-sectional structural diagram of CC;

[0048] Figure 4 for Figure 2 Schematic diagram of the partial cross-sectional structure of DD;

[0049] Figure 5 This is a schematic diagram showing the installation position of the unloading slot of this utility model;

[0050] Figure 6 This is a schematic diagram of the frame structure of this utility model;

[0051] Figure 7This is a schematic diagram of the structure of the moving pair bearing housing of this utility model;

[0052] Figure 8 This is a schematic diagram of the installation of the moving pair bearing housing of this utility model;

[0053] Figure 9 This is a schematic diagram illustrating the installation of the grease plug and grease nozzle of this utility model;

[0054] Figure 10 This is a partial cross-sectional view of the structure of this utility model;

[0055] Figure 11 This is a schematic diagram of the installation of the gasket of this utility model;

[0056] Figure 12 This is a partial structural assembly diagram of the present invention;

[0057] Figure 13 This is a side view of the solar heat sink of this utility model.

[0058] Figure 14 This is a schematic diagram showing the positions of the air inlet and the first air outlet of this utility model.

[0059] Figure 15 This is a cross-sectional view of the heat conduction channel of this utility model.

[0060] The markings in the diagram are explained as follows:

[0061] 100. Rack; 101. Rack air inlet; 102. Rack air outlet; 103. Heat dissipation air inlet; 104. Bearing housing window;

[0062] 110. Static plate; 111. Static plate air inlet; 112. Static plate air outlet;

[0063] 200. Moving plate; 210. Moving plate air inlet; 220. Moving plate air outlet;

[0064] 300, bushing; 301, moving main bearing; 302, first plane; 303, first arc surface; 304, moving main bearing housing;

[0065] 310. Main crankshaft; 311. Main balance weight;

[0066] 320. Gasket; 330. First bearing cap;

[0067] 340. Fat removal component; 350. Fat filling component; 360. One-way valve;

[0068] 370. Unloading slot;

[0069] 380. Moving pair bearing housing; 381. Second plane; 382. Second arc surface; 383. Second bearing cap;

[0070] 390. Moving pair bearing; 391. Small crankshaft;

[0071] 400. Main bearing; 410. Bearing baffle; 420. Secondary bearing; 430. Third bearing cover; 450. Rear bearing;

[0072] 500, fat-adding channel; 510, fat-adding nozzle;

[0073] 600. Grease drainage channel; 610. Grease drainage plug;

[0074] 700. Fan casing; 710. Air inlet duct; 720. Fan blades;

[0075] 800. Solar heat sink; 810. Heat exchanger groove; 820. Seal;

[0076] 900, heat conduction channel; 910, heat conduction hole; 920, plug. Detailed Implementation

[0077] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0078] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0079] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0080] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0081] Combination Figures 1 to 12 As shown, one embodiment of this utility model provides a long-life oil-free scroll compressor, comprising:

[0082] A rack 100, on which a stationary disk 110 is mounted;

[0083] A movable plate 200 is mounted on one side of the stationary plate 110 and is located between the stationary plate 110 and the frame 100.

[0084] A bushing 300 is installed on the side of the moving disk 200 away from the stationary disk 110. A moving main bearing 301 is provided on the bushing 300. A main crankshaft 310 is also provided on the bushing 300. The moving main bearing 301 is sleeved on the main crankshaft 310. A gasket 320 is provided on the inner side of the moving main bearing 301. The gasket 320 is located between the moving main bearing 301 and the main crankshaft 310. A first bearing cover 330 is provided on the bushing 300 and is sleeved on the main crankshaft 310. A moving main bearing seat 304 is provided on the bushing 300, and the moving main bearing 301 is located inside the moving main bearing seat 304.

[0085] The bushing 300 is provided with a grease discharge component 340, a grease filling component 350 and a one-way valve 360, wherein the one-way valve 360 ​​is used to discharge the gas and grease generated by pressure when the bearing is heated.

[0086] A solar heat sink 800 is provided on the main crankshaft 310;

[0087] The main crankshaft 310 is provided with a heat conduction channel 900, which is used to introduce coolant.

[0088] In this embodiment, the inner ring of the moving main bearing 301 uses a shim 320, which is installed on the side opposite to the force direction, i.e. the loose side, so that the outer circle of the inner side increases in diameter on this side, thereby reducing the loose clearance on this side. When working, after thermal expansion, the clearance of the entire bearing is basically 0 or slightly interference, so that the rollers can roll fully and avoid slippage. The bearing's force-bearing area is greatly increased, the bearing raceway stress is reduced, and the overall bearing life is maximized.

[0089] It should be noted that due to the heat generated during machine operation, the gas inside the bearing cavity expands due to heat, and the pressure inside the cavity increases. At this time, the gas overflows through the one-way valve 360. Also, when the customer replaces the grease, the amount added may be inaccurate due to inaccurate control, which may lead to an increase in pressure. When the vent is blocked, the machine continues to run, causing excessive bearing heating and increased pressure inside the cavity. At this time, the excess grease or pressure is automatically discharged through the one-way valve 360. This ensures that the bearing is not damaged due to excessive heating of the grease, or that the grease does not overflow from the oil seal on the first bearing cover 330. When the pressure reaches a certain level, the one-way valve 360 ​​opens and closes after the gas is discharged, or other valve components that can control the flow of gas may be used. This is not the only one specified here.

[0090] Furthermore, the heat transferred from the moving main bearing 301 and the main bearing 400 to the main crankshaft 310 is absorbed by the solar heat sink 800 and dissipated by airflow generated by rotation. The hot air is discharged from the bearing housing window 104, further cooling the heat on the main crankshaft 310, thereby reducing the temperature of the moving main bearing 301 and the main bearing 400 and their grease, and extending the life of the bearings and grease. This is an extended solution. It is explained here that the heat conduction channel 900 guides the heat from the moving main bearing 301 and the main bearing 400 to the solar heat sink 800 for heat dissipation, and introduces coolant to reduce the temperature of the main bearing 301 and the main bearing 400. The coolant is heat transfer oil or refrigerant.

[0091] In one embodiment, the bushing 300 is provided with at least three circumferentially distributed moving pair bearing seats 380, and the moving pair bearing seats 380 are fixedly disposed on the bushing 300.

[0092] In this embodiment, one option is that the moving pair bearing housing 380 is directly fixed to the bushing 300, which will be described here.

[0093] In one embodiment, the bushing 300 is provided with at least three unloading grooves 370, which are located between the moving main bearing seat 304 and the moving auxiliary bearing seat 380, or in the hole of the moving auxiliary bearing seat 380, and have an arc notch on the center side.

[0094] In this embodiment, the unloading groove 370 is used to solve the problem that the temperature rise of the materials between the three moving bearings 390 and the moving main bearing housing 304 of the bushing 300 is different after startup, and the temperature rise of the materials between the auxiliary bearing 420 and the main bearing 400 of the frame 100 is also different. The bushing 300 is close to the heat source in the center of the moving disk 200 and has contact heat transfer, so the temperature rise of the bushing 300 is often greater than that of the frame 100. Due to factors such as these, different thermal expansion elongation occurs, resulting in different distances L1\L2\L3 on the three parallel axes of the bushing 300 (e.g., ...). Figure 5 (As shown) and the distances L21\L22\L23 from the parallel axis on the frame 100 (as shown) Figure 6The parallel distances on the bushings 300 and 300 are different, and the parallel distances on the bushings 300 are greater than the parallel distances on the frame 100. This causes the moving bearing 390 to be subjected to thermal expansion, resulting in an additional load increase. The reaction force of the moving bearing 390 is transmitted to the moving main bearing 301 through the bushings 300, which leads to an increase in the load on the moving main bearing 301. Moreover, the increase in load on the moving main bearing 301 is uneven. The increase in local load will cause the grease in this bearing to heat up, the oil film to become thinner, the lubrication effect to be reduced, and friction or wear to be increased. Raceway wear is likely to occur, and the grease is likely to deteriorate, resulting in a shorter life of the bearing and grease, and easy damage to the machine. The above technical problems are solved by disconnecting the radial elongation through the unloading groove 370 and providing deformation buffer.

[0095] It should be noted that the unloading groove 370 is located between the moving main bearing housing 304 and the moving secondary bearing housing 380, or inside the moving secondary bearing housing 380. Its width is not less than the area covered by the center of the bushing 300 and the two tangents of the moving secondary bearing housing 380, and it has an arc-shaped notch on the side near the center, the range of which is less than 180 degrees, and its depth is unlimited.

[0096] In one embodiment, the bushing 300 and the moving pair bearing housing 380 are designed separately. The moving pair bearing housing 380 has two second planes 381 and a second arc surface 382 serving as a transition between the two second planes 381. The two second planes 381 are mirror images of the coaxial surface formed by the axis of the bushing 300 and the axis of the moving pair bearing housing 380. The bushing 300 has a first plane 302 that mates with the second planes 381 and a first arc surface 303 that mates with the second arc surface 382. The moving pair bearing housing 380 is fitted onto the bushing 300, and a moving pair bearing 3 is provided on the moving pair bearing housing 380. 90 and small crankshaft 391, the moving pair bearing 390 is sleeved on the small crankshaft 391, the second arc surface 382 and the first arc surface 303 are used to fill the gap with compensation material to bear a certain radial force, the second plane 381 and the first plane 302 are used to stop rotation, when the bushing 300 expands and contracts with heat, the moving pair bearing seat 380 can only move radially in the gap between it and the bushing 300; to compensate for the displacement of the moving pair bearing seat 380 when the bushing 300 and the moving disk 200 are heated and expanded, or to eliminate the deformation load caused by the expansion of the parts on the moving pair bearing seat 380, the bottom of the moving pair bearing seat 380 is in contact with the bottom of the bearing hole of the bushing 300.

[0097] In one embodiment, the frame 100 is provided with a frame air inlet 101 and a frame air outlet 102, which are used to cool the main balance block 311. The frame 100 is provided with a moving plate air inlet 210 for air intake of the moving plate 200 and a moving plate air outlet 220 for air exhaust of the moving plate 200.

[0098] The static plate 110 is provided with a static plate air inlet 111 and a static plate air outlet 112;

[0099] A heat dissipation air inlet 103 is provided on one side of the frame 100, which is used to dissipate heat from the solar heat sink 800.

[0100] The rack air inlet 101, moving plate air inlet 210, stationary plate air inlet 111, and heat dissipation air inlet 103 are all connected to the air inlet duct 710.

[0101] In this embodiment, the cooling principle of the moving main bearing 301 and the main bearing 400 is as follows: the cold air generated by the fan blade 720 enters the space where the main balance block 311 is located through the air inlet 710 and the frame air inlet 101 and cools it. When the cold air enters between the moving main bearing 301 and the main bearing 400, it transfers the heat generated by the inner rings of the two bearings to the bearing housing, oil seal cover, main balance block 311 and main crankshaft 310. The surface of the above parts is cooled by the cold air, thereby reducing the temperature of the moving main bearing 301 and the main bearing 400 and their grease, thus extending the life of the bearings and grease. The hot air generated by the heat exchange is discharged through the frame air outlet 102. At the same time, the cold air generated by the fan blade 720 is blown towards the solar heat sink 800 through the air inlet 710 and the heat dissipation air inlet 103 for heat dissipation.

[0102] The grease-draining component 340 and the grease-adding component 350 on the bushing 300 are located on one side of the air inlet duct 710, so as to facilitate the grease-adding and grease-draining operations to be completed in the same position.

[0103] It should be noted that the solar heat sink 800 can be installed between the main bearing 400 and the rear bearing 450. The heat transferred from the moving main bearing 301 and the main bearing 400 to the main crankshaft 310 is absorbed and dissipated by the solar heat sink 800. Under the action of airflow generated by rotation, the hot air is discharged from the bearing seat window 104, further cooling the heat on the main crankshaft 310, thereby reducing the temperature of the moving main bearing 301 and the main bearing 400 and their grease, and extending the life of the bearings and grease.

[0104] Furthermore, one end of the heat conduction channel 900 is provided with a heat conduction hole 910, and the other end is provided with a plug 920. The inner side of the solar heat sink 800 is provided with a heat exchange groove 810, and the heat conduction hole 910 is connected to the heat exchange groove 810. Sealing elements 820 are provided at both ends of the inner side of the solar heat sink 800 to prevent coolant from flowing out of the heat exchange groove 810. The heat conduction channel 900 transfers the heat generated by the main bearing 301 and the main bearing 400 to the solar heat sink 800 through the coolant, thereby further improving the heat dissipation effect.

[0105] The frame 100 is provided with a number of auxiliary bearings 420 equal to the number of small crankshafts 391. The auxiliary bearings 420 are sleeved on the end of the small crankshaft 391 away from the moving bearing 390. The frame 100 is also provided with a number of third bearing covers 430 equal to the number of auxiliary bearings 420. The third bearing covers 430 are sleeved on the small crankshaft 391. The main bearing 400 is provided with bearing baffles 410 at both ends.

[0106] The frame 100 is provided with a grease filling channel 500, which is connected to the main bearing 400 and located between the two bearing baffles 410. A grease filling nozzle 510 is provided on the grease filling channel 500.

[0107] The frame 100 is provided with a grease draining channel 600, which is connected to the main bearing 400. A grease draining plug 610 is provided on the grease draining channel 600.

[0108] A fan housing 700 is mounted on the frame 100, the fan housing 700 is located on one side of the frame 100, the air inlet duct 710 is located on one side of the fan housing 700, and the air inlet duct 710 is detachably connected to the fan housing 700. The air inlet duct 710 is detachably connected to the frame 100, and a fan blade 720 is mounted on the main crankshaft 310, the fan blade 720 is located inside the fan housing 700.

[0109] In this embodiment, the present invention provides a solution that allows for grease filling and grease discharge opening at the same location. By disassembling the air inlet duct 710, processing and grease discharge can be carried out simultaneously at the side window of the frame 100. The grease enters from one end of the bearing and exits from the other end, which is the optimal grease filling solution (the grease filling steps have been clearly defined above and will not be elaborated further here). This solution effectively ensures that new grease passes through the entire bearing and that all old grease is discharged. The operation is simple and can be repeated frequently. Due to its ease of operation, it is more convenient to add grease, effectively ensuring the reliability of the machine. The main bearing 400 can be greased and the grease discharge plug can be opened at the same location, facilitating simple and repeatable operations. Due to its ease of operation, it is more convenient to add grease, effectively ensuring the reliability of the machine.

[0110] In this embodiment, a method for simultaneously lubricating and draining the same bearing at a single location is provided. When lubricating and draining the moving main bearing 301, the air inlet duct 710 is first removed. At the same side of the frame 100, the moving main bearing 301 is lubricated through the lubrication component 350 and drained through the grease discharge component 340 at the other end of the moving main bearing 301. This effectively ensures that new grease passes through the entire bearing and that all old grease is discharged. The operation is simple and can be repeated frequently. When lubricating and draining the main bearing 400, the main bearing 400 is lubricated through the lubrication channel 500 at the exposed top of the frame 100, and drained through the grease discharge channel 600 at the same location. The above lubrication and draining method can be performed on the same bearing at the same location, making grease application more convenient and effectively ensuring the reliability of the machine.

[0111] It should be noted that, Figure 12 for Figure 1 The schematic diagram of the middle part of the structure, which is assembled from the moving plate assembly 2000 and the frame assembly 1000, is described here.

[0112] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made using the paper parts and drawings of the present utility model under the inventive concept of the present utility model, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A long-life oil-free scroll compressor, characterized in that, include: A rack (100) on which a stationary disk (110) is mounted. A movable disk (200) is mounted on one side of the stationary disk (110) and is located between the stationary disk (110) and the frame (100); A bushing (300) is installed on the side of the moving disc (200) away from the stationary disc (110). A moving main bearing (301) is provided on the bushing (300). A main crankshaft (310) is also provided on the bushing (300). The moving main bearing (301) is sleeved on the main crankshaft (310). A gasket (320) is provided on the inner side of the moving main bearing (301). The gasket (320) is located between the moving main bearing (301) and the main crankshaft (310). A first bearing cover (330) is provided on the bushing (300) and is sleeved on the main crankshaft (310). A moving main bearing seat (304) is provided on the bushing (300). The moving main bearing (301) is located inside the moving main bearing seat (304). The bushing (300) is provided with a grease discharge component (340), a grease filling component (350) and a one-way valve (360), wherein the one-way valve (360) is used to discharge the gas and grease generated by pressure when the bearing is heated; A solar heat sink (800) is provided on the main crankshaft (310). A heat conduction channel (900) is provided on the main crankshaft (310), and the heat conduction channel (900) is used to introduce coolant.

2. The long-life oil-free scroll compressor as described in claim 1, characterized in that, The bushing (300) is provided with at least three circumferentially distributed moving pair bearing seats (380), and the moving pair bearing seats (380) are fixedly disposed on the bushing (300).

3. A long-life oil-free scroll compressor as described in claim 2, characterized in that, The bushing (300) is provided with at least three unloading grooves (370), which are located between the moving main bearing seat (304) and the moving auxiliary bearing seat (380), or in the hole of the moving auxiliary bearing seat (380), and have an arc notch on the side near the center.

4. A long-life oil-free scroll compressor as described in claim 2, characterized in that, The bushing (300) and the moving pair bearing housing (380) are designed separately. The moving pair bearing housing (380) has two second planes (381) and a second arc surface (382) that serves as a transition between the two second planes (381). The two second planes (381) are mirror images of the coaxial surface formed by the axis of the bushing (300) and the axis of the moving pair bearing housing (380). The bushing (300) has a first plane (302) that mates with the second planes (381) and a first arc surface (303) that mates with the second arc surface (382). The moving pair bearing housing (380) is fitted onto the bushing (300), and a moving pair bearing (390) is provided on the moving pair bearing housing (380). The moving pair bearing (390) is sleeved on the small crankshaft (391). The second arc surface (382) and the first arc surface (303) are filled with compensation material to bear a certain radial force. The second plane (381) and the first plane (302) are used to stop rotation. When the bushing (300) expands and contracts with heat, the moving pair bearing seat (380) can only move radially in the gap between it and the bushing (300). When the bushing (300) and the moving disk (200) are heated and expanded, the moving pair bearing seat (380) is pushed to compensate for displacement, or to eliminate the deformation load caused by the expansion of the parts on the moving pair bearing seat (380). The bottom of the moving pair bearing seat (380) is in contact with the bottom of the bearing hole of the bushing (300).

5. A long-life oil-free scroll compressor as described in claim 4, characterized in that, The frame (100) is provided with a frame air inlet (101) and a frame air outlet (102), which are used to cool the main balance block (311). The frame (100) is provided with a moving plate air inlet (210) for air intake of the moving plate (200) and a moving plate air outlet (220) for air exhaust of the moving plate (200). The stationary plate (110) is provided with a stationary plate air inlet (111) and a stationary plate air outlet (112). A heat dissipation air inlet (103) is provided on one side of the frame (100), and the heat dissipation air inlet (103) is used to dissipate heat from the solar heat sink (800). The rack air inlet (101), moving plate air inlet (210), stationary plate air inlet (111), and heat dissipation air inlet (103) are all connected to the air inlet duct (710).

6. A long-life oil-free scroll compressor as described in claim 5, characterized in that, The frame (100) is provided with a number of auxiliary bearings (420) equal to the number of small crankshafts (391). The auxiliary bearings (420) are sleeved on the end of the small crankshaft (391) away from the moving bearing (390). The frame (100) is also provided with a number of third bearing covers (430) equal to the number of auxiliary bearings (420). The third bearing covers (430) are sleeved on the small crankshaft (391). Bearing baffles (410) are provided at both ends of the main bearing (400). The frame (100) is provided with a grease filling channel (500), which is connected to the main bearing (400) and located between the two bearing baffles (410). The grease filling channel (500) is provided with a grease filling nozzle (510). The frame (100) is provided with a grease discharge channel (600), which is connected to the main bearing (400). A grease discharge plug (610) is provided on the grease discharge channel (600).

7. A long-life oil-free scroll compressor as described in claim 6, characterized in that, A fan housing (700) is installed on the frame (100), the fan housing (700) is located on one side of the frame (100), the air inlet (710) is located on one side of the fan housing (700), and the air inlet (710) is detachably connected to the fan housing (700). The air inlet (710) is detachably connected to the frame (100), and a fan blade (720) is installed on the main crankshaft (310), the fan blade (720) is located inside the fan housing (700).

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