A friction reducing structure of compressor, compressor and air conditioner

Abstract

The present disclosure provides a friction reduction structure of a compressor, a compressor and an air conditioner, wherein the friction reduction structure of the compressor comprises: a crankshaft, a movable scroll and a first bracket, wherein the movable scroll comprises an eccentric portion of the movable scroll, and the crankshaft comprises an eccentric portion of the crankshaft; a first intermediate cavity is formed between the outer peripheral surface of the eccentric portion of the movable scroll and the first bracket in the radial direction, and a second intermediate cavity is formed between the axial end of the eccentric portion of the movable scroll and the first bracket; a partition component is arranged between the axial end of the eccentric portion of the movable scroll and the first bracket, and when the compressor is running, the partition component can separate the first intermediate cavity from the second intermediate cavity, so that the second intermediate cavity is not connected to the first intermediate cavity. According to the present disclosure, the back pressure on the movable scroll toward the fixed scroll can be reduced, the friction between the movable and fixed scrolls can be reduced, and the reliability of the scroll compressor can be improved; the overturning of the movable scroll can be reduced; the overturning moment of the movable scroll can be balanced; and the power consumption loss caused by rotating oil stirring can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a friction reducing structure of a compressor, a compressor and an air conditioner. Background Art

[0002] Scroll compressors are widely used in air conditioning and heat pump systems due to their high efficiency, small size and smooth operation. Generally speaking, a scroll compressor consists of a closed tube shell, a movable scroll, a stationary scroll, a frame, a crankshaft, an anti-rotation slip ring, a motor and a friction-reducing structure. The reliability of scroll compressors is a common concern in the industry, among which the wear and breakage of the movable and stationary disks are a major problem in reliability issues. The wear is mainly caused by two factors: one is lack of oil, and the other is excessive bearing capacity leading to oil film rupture. Therefore, how to reduce the back pressure of the movable scroll, make the scroll run more smoothly, and ensure the reliability of the scroll compressor needs to be solved urgently.

[0003] Since the scroll compressor in the prior art has a high back pressure of the movable scroll, the friction between the movable and static disks is large, resulting in serious friction power consumption, which affects the reliability of the compressor operation; and the high back pressure of the movable scroll can also cause the movable scroll to overturn; since the eccentric part of the movable scroll is in high-pressure oil, it will produce a large oil stirring resistance during rotation, resulting in increased useless power consumption; since the high-pressure oil enters the middle cavity between the movable scroll and the bracket, the oil return speed is slow, and the oil pool at the bottom of the compressor is prone to oil shortage and other technical problems, the present invention studies and designs a compressor friction reduction structure, a compressor and an air conditioner. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the scroll compressor in the prior art that the back pressure of the movable scroll plate is relatively high, resulting in a large friction force between the movable and static plates, causing serious friction power consumption and affecting the operating reliability of the compressor, thereby providing a compressor friction reduction structure, a compressor and an air conditioner.

[0005] In order to solve the above problems, the present invention provides a friction reducing structure of a compressor, which comprises:

[0006] A crankshaft, a movable scroll and a first bracket, wherein the movable scroll comprises an eccentric portion of the movable scroll, the crankshaft comprises an eccentric portion of the crankshaft, and the eccentric portion of the movable scroll can be sleeved on the eccentric portion of the crankshaft and driven to move by the eccentric portion of the crankshaft;

[0007] A first intermediate cavity is formed between the outer peripheral surface of the movable disc eccentric portion and the first bracket in the radial direction, and a second intermediate cavity is formed between the axial end of the movable disc eccentric portion and the first bracket;

[0008] The friction reduction structure also includes a partition component, which is arranged between the axial end of the eccentric portion of the movable plate and the first bracket, and when the compressor is running, the partition component can separate the first intermediate cavity from the second intermediate cavity, so that the second intermediate cavity is not connected to the first intermediate cavity.

[0009] In some embodiments, the partition component includes an annular plate and an annular ring, the annular plate includes a radial inner wall and a radial outer wall, the radial inner wall forms a circular hole, and the partition component is sleeved on the eccentric portion of the crankshaft through the circular hole, the annular ring is connected to the radial outer wall and extends along the axial direction of the partition component, the annular plate can abut against the eccentric portion of the moving plate, and the annular ring can abut against the first bracket.

[0010] In some embodiments, a gap is formed between the radial inner wall of the annular plate and the outer peripheral wall of the crankshaft eccentric portion, so that the circular hole forms a first flow channel at the gap, which enables the oil and / or gas between the outer peripheral wall of the crankshaft eccentric portion and the inner peripheral wall of the movable plate eccentric portion to enter the second intermediate cavity through the first flow channel, so as to generate a force on the partition component toward the eccentric portion of the movable plate, so that the partition component abuts against the eccentric portion of the movable plate.

[0011] In some embodiments, the radial inner wall of the annular plate is located between the radial inner peripheral wall and the radial outer peripheral wall of the eccentric portion of the movable plate.

[0012] In some embodiments, an oil hole is provided through the ring in a radial direction, and a connecting channel is provided on the first bracket. The oil hole can be connected with the connecting channel to guide the oil in the second intermediate cavity to the outside of the first bracket.

[0013] In some embodiments, the communication channel is opened along the radial direction of the first bracket.

[0014] In some embodiments, an annular oil groove is further provided on the first bracket, one end of the annular oil groove can be connected to the oil hole, and the other end of the annular oil groove can be connected to the connecting channel.

[0015] In some embodiments, the friction reducing structure further includes an oil return pipe, one end of which is inserted into the communication channel to communicate with the communication channel, and the other end of which is communicated to the outside of the first bracket.

[0016] In some embodiments, the movable scroll includes a base plate and a scroll tooth, the eccentric portion of the movable scroll is connected to one axial side of the base plate, the scroll tooth is connected to the other axial side of the base plate, and an air flow channel is also opened on the base plate at a position opposite to the first intermediate cavity, one end of the air flow channel is connected to the first intermediate cavity, and the other end is connected to the cavity surrounded by the scroll tooth.

[0017] In some embodiments, the cavity surrounded by the vortex teeth that is axially opposite to the first intermediate cavity is a medium-pressure cavity, the cavity surrounded by the vortex teeth that is axially opposite to the eccentric portion of the crankshaft is a high-pressure cavity, and the cavity surrounded by the vortex teeth that is radially opposite to the outer side of the first intermediate cavity is a low-pressure cavity.

[0018] In some embodiments, the partition member can move in the axial direction between the axial end of the eccentric portion of the movable plate and the first bracket;

[0019] When the compressor is not started, the second axial end of the partition member axially facing the first bracket is connected to the first bracket, and there is a gap between the first axial end of the partition member axially facing the eccentric portion of the movable plate and the eccentric portion of the movable plate;

[0020] When the compressor is started, the gas in the compressor housing enters the second intermediate cavity through the communicating passage and the oil hole to push the partition component, so that the axial first end of the partition component axially facing the eccentric portion of the movable plate abuts against the eccentric portion of the movable plate, and a gap exists between the axial second end of the partition component axially facing the first bracket and the first bracket;

[0021] After the compressor runs for a preset time, the oil and / or gas between the outer peripheral wall of the crankshaft eccentric part and the inner peripheral wall of the moving plate eccentric part enters the second intermediate cavity through the circular hole, and the gas in the second intermediate cavity is discharged to the outside of the first bracket along the oil hole and the connecting channel. The oil and / or gas entering the second intermediate cavity can push the partition component, so that the axial first end of the partition component axially facing the moving plate eccentric part abuts against the moving plate eccentric part, and there is a gap between the axial second end of the partition component axially facing the first bracket and the first bracket.

[0022] In some embodiments, a groove is further provided on the first bracket at a position opposite to the second axial end of the partition member, so that the second axial end can be clamped in the groove;

[0023] When the axial second end is clamped in the groove, there is a gap between the axial first end of the partition component and the eccentric portion of the movable plate;

[0024] When air and / or oil is introduced into the second intermediate cavity, the partition component is pushed to move axially toward the eccentric portion of the movable plate until it abuts against the eccentric portion of the movable plate, and the second axial end escapes from the groove.

[0025] In some embodiments, the partition member is capable of self-rotation.

[0026] The present invention also provides a compressor, comprising the friction reducing structure of the compressor as described in any of the preceding items, wherein the compressor is a scroll compressor.

[0027] The present invention also provides an air conditioner, comprising the compressor as described in any of the preceding items.

[0028] The friction reduction structure of a compressor, the compressor and the air conditioner provided by the present invention have the following beneficial effects:

[0029] 1. The present invention can effectively separate the first intermediate cavity and the second intermediate cavity when the compressor is running by setting a partition component between the axial end of the eccentric part of the movable disk and the first bracket, so that the first intermediate cavity and the second intermediate cavity are not connected, so that the high-pressure oil and / or gas from the oil groove inside the crankshaft can be effectively prevented from entering the first intermediate cavity, and the high-pressure gas from the inside of the compressor housing can also not enter the first intermediate cavity, thereby effectively reducing the back pressure on the movable scroll toward the fixed scroll, thereby reducing the friction between the movable and fixed scrolls, reducing wear, reducing friction power consumption, and improving the vortex The reliability of the compressor is improved; since the pressure in the first intermediate cavity is reduced, the pressure of the first intermediate cavity acting on the corresponding position of the movable scroll is reduced, thereby reducing the torque of the movable and fixed scrolls that causes unstable operation and reduces the possibility of the movable scroll tipping over; at the same time, the lubricating oil in the second intermediate cavity can play a buffering role, balancing the tipping torque of the movable scroll and reducing the friction and wear caused by rigid contact; since the high-pressure oil will not enter the first intermediate cavity and the eccentric part of the movable disk is not placed in the high-pressure oil cavity, the stirring resistance of the eccentric part of the movable disk is effectively reduced, and the power consumption loss caused by the rotating stirring oil is reduced;

[0030] 2. The present invention can also effectively introduce the medium-pressure gas in the compression operation process into the first intermediate cavity through the air flow channel opened at the position opposite to the first intermediate cavity on the movable scroll, so that the medium-pressure gas pressure acts on the position opposite to the first intermediate cavity, and the bottom of the partition component is high-pressure oil and / or gas, so the partition component is driven by the pressure difference to press against the axial end of the eccentric part of the movable disk, thereby realizing the separation between the gas phase of the second intermediate cavity and the liquid phase of the first intermediate cavity; and the eccentric part of the movable disk is accommodated in the gas phase environment of the first intermediate cavity, compared with the original high-pressure oil environment, the resistance of the movable scroll during rotation is effectively reduced; and through the separation effect of the partition component, the first intermediate cavity is filled with gas, and the lubricating oil will not enter the first intermediate cavity, so that the speed of returning oil from the second intermediate cavity to the bottom of the compressor casing is faster, ensuring that there is no shortage of oil at the bottom of the oil pool, thereby improving the reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is an internal structure diagram of a scroll compressor of the present invention;

[0032] Figure 2 yes Figure 1 A partial enlarged view of part A of the scroll compressor before starting;

[0033] Figure 3 yes Figure 1 A partial enlarged view of part A of the scroll compressor during startup;

[0034] Figure 4 yes Figure 1 A partial enlarged view of part A of the scroll compressor after it has been running for a period of time;

[0035] Figure 5 yes Figure 4 Schematic diagram of the flow of lubricating oil in;

[0036] Figure 6a is a three-dimensional structural diagram of the partition member of the present invention (seen from above);

[0037] Figure 6b is a three-dimensional structural diagram of the partition member of the present invention (seen from below);

[0038] Figure 6c It is a front cross-sectional view of the partition member of the present invention.

[0039] The reference numerals are as follows:

[0040] 1. Intake pipe; 2. Compressor upper cover; 3. Shell; 4. Support structure; 41. First intermediate cavity; 42. Second intermediate cavity; 5. Muffler; 6. Stationary scroll; 7. Second bracket; 8. First bracket; 81. Connecting channel; 82. Annular oil groove; 83. Groove; 9. Moving scroll; 91. Moving disk eccentric part; 92. Base plate; 93. Scroll gear; 94. Air flow channel; 95. High pressure cavity; 96. Medium pressure cavity; 97. Low pressure cavity; 10. Oil return pipe; 11. Motor stator; 12. Motor rotor; 13. Compressor exhaust pipe; 14. Oil pump; 15. Crankshaft; 151. Crankshaft eccentric part; 16. Partition component; 161. Annular plate; 162. Ring; 163. Radial inner wall; 164. Radial outer wall; 165. Circular hole; 166. Oil through hole. DETAILED DESCRIPTION

[0041] like Figure 1-6c As shown, the present invention provides a friction reducing structure of a compressor, which comprises:

[0042] A crankshaft 15, a movable scroll 9 and a first bracket 8, wherein the movable scroll 9 includes a movable scroll eccentric portion 91, and the crankshaft includes a crankshaft eccentric portion 151, wherein the movable scroll 91 can be sleeved on the crankshaft eccentric portion 151 and driven to move by the crankshaft eccentric portion 151;

[0043] A first intermediate cavity 41 is formed between the outer circumferential surface of the movable disc eccentric portion 91 and the first bracket 8 in the radial direction, and a second intermediate cavity 42 is formed between the axial end of the movable disc eccentric portion 91 and the first bracket 8 (preferably in the axial direction);

[0044] The friction reduction structure further includes a partition member 16, which is disposed between the axial end of the movable disk eccentric portion 91 and the first bracket 8, and when the compressor is running, the partition member 16 can separate (seal) the first intermediate cavity 41 and the second intermediate cavity 42, so that the second intermediate cavity 42 is not connected to the first intermediate cavity 41. This reduces the pressure of the first intermediate cavity 41 and the second intermediate cavity 42 acting on the movable scroll 9.

[0045] The present invention can effectively separate the first intermediate cavity and the second intermediate cavity when the compressor is running by providing a partition component between the axial end of the eccentric portion of the movable disk and the first bracket, so that the first intermediate cavity and the second intermediate cavity are not connected, thereby effectively preventing the high-pressure oil and / or gas from the oil groove inside the crankshaft from entering the first intermediate cavity, and preventing the high-pressure gas from inside the compressor housing from entering the first intermediate cavity, thereby effectively reducing the back pressure on the movable scroll toward the fixed scroll, thereby reducing the friction between the movable and fixed scrolls, reducing wear, reducing friction power consumption, and improving the vortex pressure. The reliability of the compressor is improved; since the pressure in the first intermediate chamber is reduced, the pressure of the first intermediate chamber acting on the corresponding position of the movable scroll is reduced, thereby reducing the torque of the movable and static scrolls that causes unstable operation and reduces the possibility of the movable scroll overturning; at the same time, the lubricating oil in the second intermediate chamber can play a buffering role, balance the overturning torque of the movable scroll, and reduce the friction and wear caused by rigid contact; since the high-pressure oil will not enter the first intermediate chamber and the eccentric part of the movable disk is not placed in the high-pressure oil chamber, the stirring oil resistance of the eccentric part of the movable disk is effectively reduced, and the power consumption loss caused by the rotating stirring oil is reduced.

[0046] The present invention provides a scroll compressor pressure-driven splitting mechanism, which is placed on a scroll compressor bracket, and a certain gap is formed between the partition component and the moving disk. When the scroll compressor is started, due to the pressure difference between the exhaust high-pressure chamber and the compression medium-pressure chamber, the partition component floats up and is close to the moving scroll disk, and the pressure splitting and oil-gas splitting are completed with the chamber where the eccentric part is located, thereby reducing the power consumption of the eccentric part rotation and the contact friction power consumption of the moving and static disks. The partition component is not connected to the moving scroll disk, which has the advantage that the moving disk may overturn when the scroll compressor is running, and the lubricating oil under the partition component can play a buffering role, balancing the overturning moment of the moving scroll disk and avoiding the friction wear caused by rigid contact.

[0047] The significant reduction in compressor power consumption is due to two reasons: first, the fluid environment of the eccentric part is changed from lubricating oil to refrigerant, which reduces the stirring wind resistance; second, the back pressure of the movable scroll is reduced, thereby reducing the friction between the movable and static disks. At the same time, the friction and wear of the movable and static disks are reduced, the compressor returns oil more quickly, and the reliability of the scroll compressor is improved.

[0048] In some embodiments, the partition component 16 includes an annular plate 161 and an annular ring 162, the annular plate 161 includes a radial inner wall 163 and a radial outer wall 164, the radial inner wall 163 forms a circular hole 165, and the partition component 16 is sleeved on the crankshaft eccentric portion 151 through the circular hole 165, the annular ring 162 is connected to the radial outer wall 164 and extends along the axial direction of the partition component 16, the annular plate 161 can abut against the moving plate eccentric portion 91, and the annular ring 162 can abut against the first bracket 8. This is the preferred structural form of the partition component of the present invention, through the annular plate can abut against the axial end of the eccentric portion of the movable scroll plate at the upper end, the ring can abut against the bracket at the lower end, the circular hole and the cavity (second cavity) below the circular hole can enter high-pressure oil and / or gas, pushing the partition component to move upward, realizing the function of automatically driving the partition component to move according to the compression process to separate the first and second cavities, thereby achieving the effect of reducing the friction between the movable and static disks, reducing the overturning moment and reducing the oil stirring resistance.

[0049] In some embodiments, a gap is formed between the radial inner wall 163 of the annular plate 161 and the outer peripheral wall of the crankshaft eccentric portion 151, so that the circular hole 165 forms a first circulation channel at the gap, which enables the oil and / or gas between the outer peripheral wall of the crankshaft eccentric portion 151 and the inner peripheral wall of the movable disc eccentric portion 91 to enter the second intermediate cavity 42 through the first circulation channel, so as to generate a force toward the movable disc eccentric portion 91 on the partition member 16, so that the partition member 16 abuts against the movable disc eccentric portion 91. A first circulation channel (located at the position of the circular hole) is formed between the radial inner wall and the radial outer wall of the annular plate, so that the high-pressure oil flowing over the crankshaft enters the second intermediate cavity through the first circulation channel, thereby pushing the annular plate to move upward and abut against the movable disc eccentric portion, thereby achieving the effect of sealing and separating the first and second intermediate cavities.

[0050] In some embodiments, the radial inner wall 163 of the annular plate 161 is located between the radial inner peripheral wall and the radial outer peripheral wall of the movable disc eccentric portion 91. This is a preferred structural form of the annular plate of the present invention, which can ensure that the high-pressure oil at the circular hole position will not leak into the first intermediate cavity when the annular plate abuts against the movable disc eccentric portion, thereby effectively ensuring the sealing and separation between the first and second intermediate cavities.

[0051] In some embodiments, the ring 162 is provided with an oil hole 166 in the radial direction, and the first bracket 8 is provided with a connecting channel 81, and the oil hole 166 can be connected with the connecting channel 81 to introduce the oil in the second intermediate cavity 42 to the outside of the first bracket 8. The present invention can also effectively introduce the oil in the inner cavity of the ring (the second intermediate cavity) through the oil hole to the connecting channel on the first bracket through the oil hole, and finally to the outside of the first bracket through the connecting channel, and enter the oil pool at the bottom of the compressor housing, so as to effectively complete the recovery of the oil.

[0052] In some embodiments, the communication channel 81 is opened along the radial direction of the first bracket 8. This is a preferred opening mode of the communication channel of the present invention. The radially opened communication channel can effectively and quickly guide the oil inside the partition component to the outside of the first bracket.

[0053] In some embodiments, the first bracket 8 is further provided with an annular oil groove 82, one end of which can be connected to the oil hole 166, and the other end of which can be connected to the connecting channel 81. The present invention also provides the annular oil groove so that the oil in the oil hole first reaches the annular oil groove, and then the annular oil groove is connected to the connecting channel, and finally the lubricating oil is discharged.

[0054] In some embodiments, the friction reducing structure further includes an oil return pipe 10, one end of which is inserted into the communication channel 81 to communicate with the communication channel 81, and the other end of which is communicated to the outside of the first bracket 8. The present invention can also effectively guide the oil in the communication channel of the first bracket to the oil pool at the bottom of the compressor housing outside the first bracket through the provision of the oil return pipe.

[0055] In some embodiments, the movable scroll plate 9 includes a base plate 92 and a scroll tooth 93, the movable disk eccentric portion 91 is connected to one axial side of the base plate 92, the scroll tooth 93 is connected to the other axial side of the base plate 92, and an air flow channel 94 is also opened on the base plate 92 at a position opposite to the first intermediate cavity 41, one end of the air flow channel 94 is connected to the first intermediate cavity 41, and the other end is connected to the cavity surrounded by the scroll tooth 93.

[0056] The present invention can also effectively introduce the medium-pressure gas in the compression operation process into the first intermediate cavity through an air flow channel opened at a position on the movable scroll relative to the first intermediate cavity, so that the medium-pressure gas pressure acts on the position of the movable scroll relative to the first intermediate cavity. The bottom of the partition component is high-pressure oil and / or gas, so the partition component is driven by the pressure difference to press against the axial end of the eccentric portion of the movable disk, thereby realizing the separation between the gas phase of the second intermediate cavity and the liquid phase of the first intermediate cavity; and the eccentric portion of the movable disk is accommodated in the gas phase environment of the first intermediate cavity, which effectively reduces the resistance of the movable scroll during rotation compared with the original high-pressure oil environment; and through the separation effect of the partition component, the first intermediate cavity is filled with gas, and the lubricating oil will not enter the first intermediate cavity, so that the speed of returning oil from the second intermediate cavity to the bottom of the compressor casing is faster, ensuring that there is no shortage of oil at the bottom of the oil pool, thereby improving the reliability of the compressor.

[0057] In some embodiments, the cavity surrounded by the volute 93 in the axially opposite portion of the first intermediate cavity 41 is a medium pressure cavity 96, the cavity surrounded by the volute 93 in the axially opposite portion of the crankshaft eccentric portion 151 is a high pressure cavity 95, and the cavity surrounded by the volute 93 in the radially opposite portion of the first intermediate cavity 41 is a low pressure cavity 97. This is a preferred structural form of the movable scroll portion of the present invention. Since the gas is sucked from the radially outer side of the movable scroll into a low pressure cavity and moves toward the vortex center along the spiral direction of the volute, its pressure gradually increases, while the cavity opposite to the first intermediate cavity is a medium pressure cavity, and the portion opposite to the vortex center is a high pressure cavity, and is finally discharged from the vortex center, and the gas in the medium pressure cavity is connected to the first intermediate cavity through the air flow channel, so that a medium pressure can be formed at the upper end of the partition component, and a high pressure of high pressure oil and / or gas can be formed at the lower end of the partition component, and then during the operation of the compressor, the partition component is pushed upward by the pressure difference to abut against the eccentric portion of the movable scroll, thereby achieving effective separation between the first and second intermediate cavities.

[0058] In some embodiments, the partition member 16 can move in the axial direction between the axial end of the movable plate eccentric portion 91 and the first bracket 8;

[0059] When the compressor is not started, the second axial end of the partition member 16 axially facing the first bracket 8 is connected to the first bracket 8, and there is a gap between the first axial end of the partition member 16 axially facing the movable plate eccentric portion 91 and the movable plate eccentric portion 91;

[0060] When the compressor is started, the gas in the compressor housing enters the second intermediate cavity 42 through the communicating passage 81 and the oil through hole 166 to push the partition member 16, so that the first axial end of the partition member 16 axially facing the movable plate eccentric portion 91 abuts against the movable plate eccentric portion 91, and a gap exists between the second axial end of the partition member 16 axially facing the first bracket 8 and the first bracket 8;

[0061] After the compressor runs for a preset time, the oil and / or gas between the outer circumferential wall of the crankshaft eccentric portion 151 and the inner circumferential wall of the movable plate eccentric portion 91 enters the second intermediate chamber 42 through the circular hole 165, and the gas in the second intermediate chamber 42 is discharged to the outside of the first bracket 8 along the oil hole 166 and the connecting channel 81. The oil and / or gas entering the second intermediate chamber 42 can push the partition component 16, so that the axial first end of the partition component 16 axially facing the movable plate eccentric portion 91 abuts against the movable plate eccentric portion 91, and there is a gap between the axial second end of the partition component 16 axially facing the first bracket 8 and the first bracket 8.

[0062] This is the automatic movement mode of the partition member of the present invention under several different working conditions. When the compressor is not started, there is no gas in the compressor housing and the crankshaft does not rotate. Therefore, there is no gas in the first intermediate cavity at the upper end of the partition member and no pressure in the second intermediate cavity at the lower end. Therefore, at this time, the partition member is connected to the upper bracket at its lower end due to the action of gravity.

[0063] When the compressor is just started, the compressed high-pressure gas enters the compressor housing, and enters the second intermediate cavity through the oil return pipe, the connecting channel, and the oil hole. At this time, the compressed gas pushes the partition member upward to abut against the eccentric part of the moving plate. When the compressor is started, the first and second intermediate cavities can be automatically separated, reducing the friction force of the moving and static plates, reducing the overturning moment, and reducing the oil stirring resistance.

[0064] After the compressor has been running for a period of time, the crankshaft drives the oil in the bottom oil pool to enter between the eccentric part of the crankshaft and the eccentric part of the moving plate, and enters the second intermediate cavity through the circular hole (first flow channel) of the partition component. The oil and / or gas entering the second intermediate cavity 42 can push the partition component 16, so that the axial first end of the partition component 16 axially toward the eccentric part 91 of the moving plate abuts against the eccentric part 91 of the moving plate. After the compressor has been running for a period of time, the separation effect of the first and second intermediate cavities can be automatically formed, reducing the friction between the moving and static plates, reducing the overturning moment and reducing the oil stirring resistance; and the lubricating oil in the second intermediate cavity can play a buffering role, balancing the overturning moment of the moving scroll plate, and reducing the friction and wear caused by rigid contact.

[0065] In some embodiments, a groove 83 is further provided on the first bracket 8 at a position opposite to the second axial end of the partition member 16, so that the second axial end can be clamped in the groove 83;

[0066] When the axial second end is clamped in the groove 83, there is a gap between the axial first end of the partition member 16 and the eccentric portion 91 of the movable plate;

[0067] When air and / or oil is introduced into the second intermediate cavity 42 , the partition member 16 is pushed to move axially toward the movable disc eccentric portion 91 until it abuts against the movable disc eccentric portion 91 , and the second axial end is released from the groove 83 .

[0068] This is a further preferred structural form of the present invention. The groove provided on the first bracket of the channel can enable the partition component to be inserted into the groove at the second axial end facing the first bracket. At this time, there is a gap between the upper end of the partition component and the eccentric part of the moving plate. When the pressure in the second intermediate chamber increases, the upper end of the partition component can be pushed to abut against the eccentric part of the moving plate, forming a sealed separation for the first and second intermediate chambers, so that the partition component can float in the axial direction; and when the second intermediate chamber is filled with high-pressure oil, the partition component is lifted up by the high-pressure oil, so that the lower end of the eccentric part of the moving plate is supported by the lubricating oil, which plays a buffering role and can balance the overturning moment.

[0069] In some embodiments, the partition member 16 can rotate on its own. The partition member can rotate on its own or not, and when it rotates on its own, the oil hole on it is always connected with the annular oil groove on the first bracket, ensuring that the oil can be continuously supplied from the partition member to the bottom oil pool outside the bracket.

[0070] The present invention also provides a compressor, comprising the friction reducing structure of the compressor as described in any of the preceding items, wherein the compressor is a scroll compressor.

[0071] The existing scroll compressor compresses the gas step by step through the moving and static scroll plates. The low-pressure side of the suction and the high-pressure side of the exhaust cause the moving and static scroll plates to produce an unstable running torque, causing the scroll plates to overturn and the contact surface of the scroll plates to suffer severe friction and wear due to the gas force, which may cause additional friction power consumption problems at the least and seriously affect the reliability of the scroll compressor at the worst. At the same time, since the crankshaft and the eccentric part of the moving plate are placed in the high-pressure oil chamber, the rotating stirring of the oil will cause huge power consumption losses.

[0072] The present invention introduces a high-pressure floating separation mechanism, and after the compressor is running, by establishing a high-low pressure difference, the eccentric part of the crankshaft and the moving plate changes from the original high-pressure area to the medium-pressure area, and the liquid phase and the gas phase are separated.

[0073] Problem Solving 1. The introduction of the partition component reduces the pressure at the bottom of the orbiting scroll, reduces the pressure difference between the contact surface of the orbiting scroll and the fixed scroll to reduce wear and improve the reliability of the scroll compressor;

[0074] Solution 2: The introduction of the partition component places the eccentric part in the gas phase, reducing the oil stirring resistance during rotation. According to the rotation windage power formula, C in the formula P为 is the resistance coefficient, H is the stirring height, f is the operating frequency, r 2 is the outer diameter, r 1 is the inner diameter, ρ is the density, the density of oil and gas differs by nearly 10 times, and the wind resistance of the eccentric part is greatly reduced;

[0075] Solution to problem 3: Due to the introduction of the oil baffle, the middle eccentric rotating chamber is filled with gas, the lubricating oil will not be wasted in the middle chamber, the oil return is faster, ensuring that there is no shortage of oil at the bottom of the oil pool, thereby improving the reliability of the compressor.

[0076] The present invention provides a scroll compressor pressure-driven splitting mechanism, which is placed on a scroll compressor bracket, and a certain gap is formed between the partition component and the moving disk. When the scroll compressor is started, due to the pressure difference between the exhaust high-pressure chamber and the compression medium-pressure chamber, the partition component floats up and is close to the moving scroll disk, and the pressure splitting and oil-gas splitting are completed with the chamber where the eccentric part is located, thereby reducing the power consumption of the eccentric part rotation and the contact friction power consumption of the moving and static disks. The partition component is not connected to the moving scroll disk, which has the advantage that the moving disk may overturn when the scroll compressor is running, and the lubricating oil under the partition component can play a buffering role, balancing the overturning moment of the moving scroll disk and avoiding the friction wear caused by rigid contact.

[0077] The significant reduction in compressor power consumption is due to two reasons: first, the fluid environment of the eccentric part is changed from lubricating oil to refrigerant, which reduces the stirring wind resistance; second, the back pressure of the movable scroll is reduced, thereby reducing the friction between the movable and static disks. At the same time, the friction and wear of the movable and static disks are reduced, the compressor returns oil more quickly, and the reliability of the scroll compressor is improved.

[0078] The present invention also provides an air conditioner, which comprises the aforementioned compressor.

[0079] like Figure 1As shown, the scroll compressor is mainly composed of a fixed scroll 6, a movable scroll 9, a crankshaft 15, an oil return pipe 10, a first bracket 8 (upper bracket), a muffler 5, a motor stator 11, a motor rotor 12, etc. The motor stator 11 and the first bracket 8 are fixed on the housing 3. The movable scroll 9 and the fixed scroll 6 are oppositely installed on the upper bracket support plate with a phase angle difference of 180 degrees. The movable scroll 9 moves under the drive of the crankshaft 15 and meshes with the fixed scroll 6 to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes. When the compressor is running, the rotor drives the crankshaft 15 to rotate, and the crank section of the crankshaft 15 is installed with an eccentric sleeve with radial flexibility. The eccentric sleeve drives the movable scroll 9 to move. Under the anti-rotation restriction of the cross slip ring, the movable scroll 9 performs translational motion around the center of the crankshaft with a fixed radius. The refrigerant entering from outside the compressor is sucked into the crescent-shaped suction chamber formed by the orbiting scroll 9 and the fixed scroll 6, and is discharged from the exhaust hole of the fixed scroll 6 after being compressed.

[0080] The crankshaft 15, the eccentric part of the movable scroll 9 and the partition member 16 are placed in the middle oil chamber, and the partition member is stationary in the groove of the first bracket 8, such as Figure 2 As shown. When the scroll compressor is started, the high-pressure gas is continuously compressed and discharged into the chamber where the motor stator 11 is located. This part of the high-pressure gas flows through the oil return pipe 10 to the lower part of the partition component 16. Since the lower part of the partition component 16 is the high-pressure side and the upper part is the low-pressure side, and under the action of the oil pump 14, the high-pressure lubricating oil at the bottom of the oil pool is pumped into the middle oil chamber through the central oil hole of the crankshaft 15. A small hole is opened in the medium-pressure chamber of the movable scroll to connect the eccentric cavity so that the eccentric part is filled with medium pressure. The pressure difference (high pressure and medium pressure) makes the baffle float and close to the lower end surface of the movable scroll 9 as shown. Figure 3 At this time, all the lubricating oil pumped by the oil pump flows out through the oil return hole of the partition component to the oil return pipe to complete an oil cycle, as shown in the figure below. Figure 5 As shown; the partition component 16 completes the high and low pressure separation of the intermediate oil chamber, the oil and gas separation, and the three functions of vibration reduction and noise reduction. The specific mechanism is as follows Figure 4 As shown. The partition component is shown in FIG6 , and its structure is similar to a flat plate with a flange, and the flange has an oil return hole connected to the oil return pipe 10 to return the lubricating oil pumped by the oil pump to the oil pool to complete the oil circulation. The partition component can be set to a self-transforming type or a non-self-transforming type. Since it has no effect on the high and low pressure separation and the oil and gas separation, the present embodiment is a self-transforming type. The lubricating oil flows along the oil hole to the flange to the annular oil groove 82 to the oil return pipe 10, and flows along the oil return pipe to the oil pool. At the same time, a keyway can be opened on the inner wall of the baffle flange to complete the anti-self-rotation design of the baffle.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A friction reducing structure for a compressor, Features: include: A crankshaft (15), a movable scroll (9) and a first bracket (8), wherein the movable scroll (9) comprises a movable scroll eccentric portion (91), and the crankshaft comprises a crankshaft eccentric portion (151), and the movable scroll eccentric portion (91) can be sleeved on the crankshaft eccentric portion (151) and driven to move by the crankshaft eccentric portion (151); A first intermediate cavity (41) is formed between the outer peripheral surface of the movable disc eccentric portion (91) and the first bracket (8) in the radial direction, and a second intermediate cavity (42) is formed between the axial end of the movable disc eccentric portion (91) and the first bracket (8); The friction reducing structure further comprises a partition component (16), the partition component (16) being arranged between an axial end of the eccentric portion (91) of the movable plate and the first bracket (8), and the partition component (16) being capable of separating the first intermediate cavity (41) from the second intermediate cavity (42) when the compressor is running, so that the second intermediate cavity (42) is not connected to the first intermediate cavity (41); The partition component (16) comprises an annular plate (161) and an annular ring (162); the annular plate (161) comprises a radial inner wall (163) and a radial outer wall (164); the radial inner wall (163) forms a circular hole (165); the partition component (16) is sleeved on the crankshaft eccentric portion (151) through the circular hole (165); the annular ring (162) is connected to the radial outer wall (164) and extends along the axial direction of the partition component (16); the annular plate (161) can abut against the movable plate eccentric portion (91); the annular ring (162) can abut against the first bracket (8); the partition component can float in the axial direction; and the first bracket (8) is also provided with an annular oil groove (82).

2. The friction reducing structure of the compressor according to claim 1, Features: A gap is formed between the radial inner wall (163) of the annular plate (161) and the outer peripheral wall of the crankshaft eccentric portion (151), so that the circular hole (165) forms a first flow channel at the gap, which enables oil and / or gas between the outer peripheral wall of the crankshaft eccentric portion (151) and the inner peripheral wall of the movable plate eccentric portion (91) to enter the second intermediate cavity (42) through the first flow channel, so as to generate a force on the partition component (16) in the direction of the movable plate eccentric portion (91), so that the partition component (16) abuts against the movable plate eccentric portion (91).

3. The friction reducing structure of the compressor according to claim 1, Features: The radial inner wall (163) of the annular plate (161) is located between the radial inner peripheral wall and the radial outer peripheral wall of the eccentric portion (91) of the movable disc.

4. The friction reducing structure of the compressor according to claim 1, Features: An oil through hole (166) is provided on the ring (162) in a radial direction, and a connecting channel (81) is provided on the first bracket (8). The oil through hole (166) can be connected to the connecting channel (81) to guide the oil in the second intermediate cavity (42) to the outside of the first bracket (8).

5. The friction reducing structure of the compressor according to claim 4, Features: The communication channel (81) is opened along the radial direction of the first bracket (8).

6. The friction reducing structure of the compressor according to claim 4, Features: One end of the annular oil groove (82) can be connected to the oil through hole (166), and the other end can be connected to the connecting channel (81).

7. The friction reducing structure of the compressor according to claim 4, Features: The friction reducing structure further comprises an oil return pipe (10), one end of the oil return pipe (10) being inserted into the communication channel (81) to communicate with the communication channel (81), and the other end of the oil return pipe (10) being communicated with the outside of the first bracket (8).

8. The friction reducing structure of the compressor according to any one of claims 1 to 4, Features: The movable scroll (9) comprises a base plate (92) and a scroll tooth (93); the movable scroll eccentric portion (91) is connected to one axial side of the base plate (92); the scroll tooth (93) is connected to the other axial side of the base plate (92); and an air flow channel (94) is provided at a position on the base plate (92) opposite to the first intermediate cavity (41); one end of the air flow channel (94) is connected to the first intermediate cavity (41); and the other end is connected to a cavity surrounded by the scroll tooth (93).

9. The friction reducing structure of the compressor according to claim 8, Features: The cavity enclosed by the swirl teeth (93) at a portion axially opposite to the first intermediate cavity (41) is a medium-pressure cavity (96), the cavity enclosed by the swirl teeth (93) at a portion axially opposite to the crankshaft eccentric portion (151) is a high-pressure cavity (95), and the cavity enclosed by the swirl teeth (93) at a portion radially opposite to the outer side of the first intermediate cavity (41) is a low-pressure cavity (97).

10. The friction reducing structure of the compressor according to claim 4, Features: The partition component (16) is capable of moving in an axial direction between an axial end of the moving disc eccentric portion (91) and the first bracket (8); When the compressor is not started, the axial second end of the partition component (16) axially facing the first bracket (8) is connected to the first bracket (8), and a gap exists between the axial first end of the partition component (16) axially facing the movable disc eccentric portion (91) and the movable disc eccentric portion (91); When the compressor is started, the gas in the compressor housing enters the second intermediate chamber (42) through the connecting passage (81) and the oil hole (166) to push the partition component (16), so that the axial first end of the partition component (16) axially facing the movable plate eccentric portion (91) abuts against the movable plate eccentric portion (91), and a gap exists between the axial second end of the partition component (16) axially facing the first bracket (8) and the first bracket (8); After the compressor has been running for a preset time, oil and / or gas between the outer peripheral wall of the crankshaft eccentric portion (151) and the inner peripheral wall of the movable plate eccentric portion (91) enters the second intermediate chamber (42) through the circular hole (165), and the gas in the second intermediate chamber (42) is discharged to the outside of the first bracket (8) along the oil through hole (166) and the connecting channel (81). The oil and / or gas entering the second intermediate chamber (42) can push the partition component (16), so that the axial first end of the partition component (16) axially facing the movable plate eccentric portion (91) abuts against the movable plate eccentric portion (91), and a gap exists between the axial second end of the partition component (16) axially facing the first bracket (8) and the first bracket (8).

11. The friction reducing structure of the compressor according to claim 10, Features: A groove (83) is also provided on the first bracket (8) at a position opposite to the axial second end of the partition component (16), so that the axial second end can be clamped in the groove (83); When the axial second end is clamped in the groove (83), a gap exists between the axial first end of the partition component (16) and the eccentric portion (91) of the movable disc; When air and / or oil is introduced into the second intermediate cavity (42), the partition component (16) is pushed to move in an axial direction toward the eccentric portion (91) of the movable disc until it abuts against the eccentric portion (91) of the movable disc, and at the same time, the second axial end escapes from the groove (83).

12. The friction reducing structure of the compressor according to claim 10, Features: The partition member (16) is capable of self-rotation.

13. A compressor, Features: The invention comprises a friction reducing structure of a compressor according to any one of claims 1 to 12, wherein the compressor is a scroll compressor.

14. An air conditioner, Features: Comprising the compressor as claimed in claim 13.

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