Scroll compressor

Abstract

The invention discloses a scroll compressor, and relates to the field of compressors, the scroll compressor comprises a shell, and a scroll compression mechanism, a driving mechanism, a hollow sleeve and a screw rotor body which are arranged in the shell, two ends of the shell are respectively provided with an oil pool and the scroll compression mechanism, and the scroll compression mechanism is provided with a lubricating liquid inlet; a hollow rotor shaft of the driving mechanism is arranged between the scroll compression mechanism and the oil pool; the hollow sleeve is fixedly connected with the end, close to the oil pool, of the shell and arranged in the end, close to the oil pool, of the hollow rotor shaft in a sleeved mode. The screw rotor body is sleeved with the hollow sleeve and connected with the hollow rotor shaft, and the driving mechanism drives the screw rotor body to rotate around the axis of the screw rotor body through the hollow rotor shaft. When the screw rotor body rotates, lubricating liquid in the oil pool can be pumped into the inner cavity of the hollow sleeve and enters the lubricating liquid inlet through the inner cavity of the hollow rotor shaft, so that the vortex compression mechanism is lubricated. The self-lubricating compressor can be self-lubricated along with work of the compressor, and is compact in structure, high in integration level and good in lubricating effect.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a scroll compressor. Background Art

[0002] Scroll compressors have the advantages of simple structure, smooth operation, low noise, high mechanical efficiency and high volumetric efficiency, and are widely used in various fields such as industry and life. Among them, the basic compression component of the scroll compressor is composed of two scroll plates with a phase difference of 180° and eccentric arrangement. During the rotation of the two scroll plates, a crescent-shaped compression chamber can be formed. The volume of the compression chamber will change periodically, so that the working medium in the compression chamber undergoes three processes of suction, compression and exhaust, and then completes the compression.

[0003] Scroll compressors include autorotating compressors and orbiting compressors. Autorotating compressors have advantages over orbiting compressors, such as small size, high pressure ratio, low noise, and high efficiency. Autorotating scroll compressors can transmit driving force between the active scroll and the driven scroll through transmission components or transmission pins. However, in high-speed and high-pressure application environments, the mechanical transmission structure of the autorotating compressor will produce large power loss and friction wear during contact friction, resulting in an increase in the operating temperature of the compressor, increased vibration and noise during operation of the compressor, and even failure of the compressor, affecting the service life of the compressor.

[0004] Existing scroll compressors mostly use splash lubrication or differential pressure oil supply to provide lubricating oil to the lubricating parts. This lubrication method has problems such as uncontrollable oil supply and unstable lubrication effect. Although some models use independent oil pumps for oil supply, they require additional control systems, which increases system complexity and cost, and has a low overall integration. Summary of the invention

[0005] The object of the present invention is to provide a scroll compressor to solve the problems existing in the above-mentioned prior art. It does not require additional control and can self-lubricate as the scroll compressor works. It has a compact structure and a high degree of integration. It can adaptively adjust the lubricating oil supply amount, thereby improving the lubricating oil supply effect.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a scroll compressor, comprising a housing and a scroll compression mechanism, a driving mechanism, a hollow sleeve and a screw rotor body arranged in the housing, wherein:

[0008] An oil pool is provided at one end of the housing;

[0009] The scroll compression mechanism is arranged at the other end of the housing, and the scroll compression mechanism has a lubricating liquid inlet;

[0010] The driving mechanism comprises a hollow rotor shaft, the hollow rotor shaft is arranged between the scroll compression mechanism and the oil pool, and the hollow rotor shaft is connected to the scroll compression mechanism;

[0011] One end of the hollow sleeve is fixedly connected to one end of the housing close to the oil pool, and the other end of the hollow sleeve is sleeved inside one end of the hollow rotor shaft close to the oil pool;

[0012] The screw rotor body is sleeved in the hollow sleeve, and the screw rotor body is connected to the hollow rotor shaft. The driving mechanism can drive the screw rotor body to rotate around its own axis through the hollow rotor shaft; the screw rotor body can pump the lubricating fluid in the oil pool into the inner cavity of the hollow sleeve and enter the lubricating fluid inlet through the inner cavity of the hollow rotor shaft by rotating around its own axis, so as to lubricate the scroll compression mechanism.

[0013] Preferably, the screw rotor body includes a threaded core shaft and at least one impeller, the outer side wall of the threaded core shaft is provided with a thread, the threaded core shaft is sleeved in the hollow sleeve, the threaded core shaft is fixedly connected to the hollow rotor shaft, and the driving mechanism can drive the threaded core shaft to rotate around its own axis through the hollow rotor shaft; each impeller is fixedly connected to one end of the threaded core shaft close to the oil pool.

[0014] Preferably, at least one oil inlet channel is provided on the outer wall of one end of the hollow sleeve close to the oil pool, the oil inlet channel is communicated with the inner cavity of the hollow sleeve, and the inner cavity of the hollow sleeve is communicated with the inner cavity of the hollow rotor shaft.

[0015] Preferably, both inner side walls of each of the oil inlet channels are curved surfaces, and there is only one oil inlet channel.

[0016] Preferably, it also includes a connecting seat, which is provided with a mounting hole; the hollow sleeve includes a hollow tube body and a flow guide body, the flow guide body has the oil inlet channel connected to the inner cavity of the hollow tube body, and the inner cavity of the hollow tube body is connected to the inner cavity of the hollow rotor shaft; one end of the hollow rotor shaft close to the oil pool is sleeved in the mounting hole and rotatably connected to the connecting seat, one end of the hollow tube body is fixedly connected to one end of the flow guide body, the other end of the hollow tube body passes through the mounting hole and is sleeved in the hollow rotor shaft, the connecting seat is fixedly connected to one end of the outer shell close to the oil pool, the flow guide body is arranged between the connecting seat and the outer shell, and the connecting seat can press the flow guide body against the outer shell.

[0017] Preferably, the threaded core shaft extends from one end away from the impeller to one end close to the scroll compression mechanism.

[0018] Preferably, the scroll compression mechanism includes an active scroll, a transmission component and a driven scroll, the active scroll and the driven scroll are both connected to the transmission component, the active scroll is connected to the hollow rotor shaft, the hollow rotor shaft can drive the active scroll to rotate around the central rotation axis of the active scroll, and the active scroll can drive the driven scroll to rotate around the central rotation axis of the driven scroll through the transmission component; the active scroll is provided with at least one first guide hole and at least one second guide hole, the axis of each of the first guide holes is aligned with the axis of the hollow rotor shaft The axes are perpendicular to each other, and the axes of the second guide holes are parallel to the axis of the hollow rotor shaft; the first guide holes are communicated with the inner cavity of the hollow rotor shaft, and the second guide holes are communicated with the first guide holes, and the second guide holes penetrate the end surface of the active scroll close to the transmission component and the end surface away from the transmission component; the lubricating fluid can enter the first guide holes from the inner cavity of the hollow rotor shaft and enter between the active scroll and the driven scroll through the second guide holes, and the lubricating fluid can return to the oil pool through the second guide holes under the action of gravity.

[0019] Preferably, the transmission component is a transmission slip ring or a transmission pin assembly.

[0020] Preferably, the scroll compression mechanism also includes a hollow air intake end cover, which is fixedly connected to the outer shell and divides the inner cavity of the outer shell into an upper cavity and a lower cavity, the scroll compression mechanism and the driving mechanism are respectively arranged in the upper cavity and the lower cavity, the hollow rotor shaft is rotatably connected to the air intake end cover, and the inner cavity of the hollow rotor shaft, the inner cavity of the air intake end cover and the first guide hole can be connected in sequence; at least one through hole is provided on the air intake end cover, and both ends of each through hole are connected to the upper cavity and the lower cavity, the lubricating fluid can enter the driving mechanism through the second guide hole and the through hole under the action of gravity, and the lubricating fluid can return to the oil pool through the second guide hole and the through hole under the action of gravity.

[0021] Preferably, the scroll compression mechanism also includes an exhaust end cover and a hollow driven shaft, the exhaust end cover is fixedly connected to the outer shell and divides the upper cavity into an exhaust chamber and a compression chamber, the scroll compression mechanism is arranged in the compression chamber, the driven shaft is rotatably connected to the exhaust end cover, and the driven scroll plate is fixedly connected to the driven shaft; the driven scroll plate is provided with a compression chamber exhaust port, and the compression chamber exhaust port, the inner cavity of the driven shaft and the exhaust chamber are connected in sequence.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention provides a scroll compressor, comprising an outer shell and a scroll compression mechanism, a driving mechanism, a hollow sleeve and a screw rotor body arranged in the outer shell, one end of the hollow sleeve is fixedly connected to one end of the outer shell close to the oil pool, and the other end of the hollow sleeve is sleeved inside one end of a hollow rotor shaft close to the oil pool; the screw rotor body is sleeved in the hollow sleeve, the screw rotor body is connected to the hollow rotor shaft, and the driving mechanism can drive the screw rotor body to rotate around its own axis through the hollow rotor shaft; the screw rotor body can pump the lubricating fluid in the oil pool to the inner cavity of the hollow sleeve and allow the lubricating fluid to enter the lubricating fluid inlet through the inner cavity of the hollow rotor shaft by rotating around its own axis, so as to lubricate the scroll compression mechanism.

[0024] The screw rotor body rotates in the hollow sleeve, and the lubricating liquid can be pumped into the inner cavity of the hollow sleeve, and then the lubricating liquid enters the lubricating liquid inlet along the inner cavity of the hollow rotor shaft, so as to realize the lubrication of the scroll compression mechanism. By integrating the screw rotor body and the hollow sleeve into the hollow rotor shaft, the volume occupied in the radial and axial space is extremely small, which is conducive to the compact scroll compressor structure and the reduction of the volume of the whole machine. When the scroll compressor starts to work, the screw rotor body can be driven to rotate, and self-lubrication can be realized synchronously, and continuous lubrication can be performed when the scroll compressor is working. The lubricating oil supply is stable and reliable, and no additional control is required, and the integration is high. The screw rotor body and the scroll compression mechanism are both driven by a driving mechanism, and the rotation speed of the screw rotor body and the working speed of the scroll compression mechanism can be automatically matched, that is, when the scroll compression mechanism works at high speed, the screw rotor body rotates at high speed to realize a large lubricating oil supply. On the contrary, when the scroll compression mechanism works at low speed, the lubricating oil supply of the screw rotor body is less, and the lubricating oil supply amount can be adaptively adjusted, thereby improving the lubricating oil supply effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of the scroll compressor provided in Example 2;

[0027] Figure 2 A schematic diagram of the structure of the hollow sleeve provided by the present invention;

[0028] Figure 3 A schematic diagram of the structure of the transmission component provided in Example 2;

[0029] Figure 4 A schematic diagram of the structure of the screw rotor body provided by the present invention;

[0030] Figure 5 A schematic diagram of the structure of the active scroll provided in Example 2;

[0031] Figure 6 A schematic diagram of the lubricating oil circuit of the scroll compressor provided in Example 2;

[0032] Figure 7 A schematic diagram of the structure of a scroll compressor provided in Example 3;

[0033] Figure 8 A schematic diagram of the structure of the active scroll provided in Example 3;

[0034] Fig. 9 A schematic diagram of the structure of the driven scroll provided in Example 3;

[0035] Fig.10 A schematic diagram of the lubricating oil circuit of the scroll compressor provided in Example 3;

[0036] In the figure: 100, scroll compressor; 1, exhaust shell; 101, exhaust port; 2, intake shell; 3, base shell; 4, exhaust end cover; 5, driven scroll; 501, compression chamber exhaust port; 502, transmission pin groove; 6, active scroll; 601, first guide hole; 602, second guide hole; 603, first keyway; 604, pin fixing hole; 7, driving shaft; 8, intake end cover; 801, through hole; 9, hollow rotor shaft; 10, threaded core shaft; 1001, impeller; 1002, threaded structure; 11, hollow sleeve; 1101, guide body; 1102, oil inlet channel; 12, rotor; 13, transmission component; 1301, first protrusion; 1302, second protrusion; 14, driven shaft; 15, stator; 16, motor housing; 17, bearing seat. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The object of the present invention is to provide a scroll compressor to solve the problems existing in the above-mentioned prior art. It does not require additional control and can self-lubricate as the scroll compressor works. It has a compact structure and a high degree of integration. It can adaptively adjust the lubricating oil supply amount, thereby improving the lubricating oil supply effect.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] like Figures 1 to 10 As shown, this embodiment provides a scroll compressor 100, including a housing and a scroll compression mechanism, a driving mechanism, a hollow sleeve 11 and a screw rotor body arranged in the housing, wherein:

[0042] An oil pool is provided at one end of the housing;

[0043] The scroll compression mechanism is arranged at the other end of the housing, and the scroll compression mechanism has a lubricating liquid inlet;

[0044] The driving mechanism includes a hollow rotor shaft 9, which is disposed between the scroll compression mechanism and the oil pool, and is connected to the scroll compression mechanism;

[0045] One end of the hollow sleeve 11 is fixedly connected to one end of the housing close to the oil pool, and the other end of the hollow sleeve 11 is sleeved inside one end of the hollow rotor shaft 9 close to the oil pool;

[0046] The screw rotor body is sleeved in the hollow sleeve 11, and the screw rotor body is connected to the hollow rotor shaft 9. The driving mechanism can drive the screw rotor body to rotate around its own axis through the hollow rotor shaft 9; the screw rotor body can pump the lubricating fluid in the oil pool into the inner cavity of the hollow sleeve 11 and allow the lubricating fluid to enter the lubricating fluid inlet through the inner cavity of the hollow rotor shaft 9 to lubricate the scroll compression mechanism.

[0047] The screw rotor body rotates in the hollow sleeve 11, and can pump the lubricating liquid into the inner cavity of the hollow sleeve 11, and then the lubricating liquid enters the lubricating liquid inlet along the inner cavity of the hollow rotor shaft 9, so as to achieve lubrication of the scroll compression mechanism. By integrating the screw rotor body and the hollow sleeve 11 into the hollow rotor shaft 9, the volume occupied in the radial space is very small, which is conducive to the compact structure of the scroll compressor 100 and reduces the volume of the whole machine. When the driving mechanism is working, when the scroll compressor 100 starts working, it drives the screw rotor body to rotate, lubricates synchronously, and continuously lubricates when the scroll compressor 100 is working. The lubricating oil supply is stable and reliable, and no additional control is required, and the integration is high. The screw rotor body and the scroll compression mechanism are both driven by the driving mechanism. The rotation speed of the screw rotor body and the working speed of the scroll compression mechanism 100 can be automatically matched, that is, when the scroll compression mechanism 100 works at high speed, the screw rotor body rotates at high speed to achieve a larger lubricating oil supply. Conversely, when the scroll compression mechanism 100 works at low speed, the lubricating oil supply of the screw rotor body is less, thereby improving the lubricating oil supply effect.

[0048] In this embodiment, the screw rotor body includes a threaded core shaft 10 and at least one impeller 1001. The outer wall of the threaded core shaft 10 is provided with threads. The threaded core shaft 10 is sleeved in a hollow sleeve 11. The threaded core shaft 10 is fixedly connected to the hollow rotor shaft 9. The driving mechanism can drive the threaded core shaft 10 to rotate around its own axis through the hollow rotor shaft 9. Each impeller 1001 is fixedly connected to one end of the threaded core shaft 10 close to the oil pool. The hollow sleeve 11 is connected to the oil pool. The impeller 1001 rotates in the hollow sleeve 11, thereby pumping the lubricating liquid into the gap between the fixed sleeve and the threaded core shaft 10. The threaded core shaft 10 and the hollow sleeve 11 rotate relative to each other, and the two cooperate to form a screw pump structure, so that the lubricating liquid can better enter the lubricating liquid inlet through the inner cavity of the hollow sleeve 11 and the inner cavity of the hollow rotor shaft 9.

[0049] In this embodiment, at least one oil inlet channel 1102 is provided on the outer wall of the end of the hollow sleeve 11 close to the oil pool, and the oil inlet channel 1102 is communicated with the inner cavity of the hollow sleeve 11, and the inner cavity of the hollow sleeve 11 is communicated with the inner cavity of the hollow rotor shaft 9. The lubricating liquid can enter the hollow sleeve 11 through the oil inlet channel 1102, and then enter the lubricating liquid inlet.

[0050] In this embodiment, the hollow sleeve 11 includes a hollow tube body and a flow guide 1101. At least a portion of the hollow tube body is sleeved in the hollow rotor shaft 9. The flow guide 1101 is fixedly connected to one end of the hollow tube body close to the oil pool. The hollow tube body is provided with a first channel extending along the length direction of the hollow tube body. The flow guide 1101 is provided with at least one oil inlet channel 1102 connected to the first channel. One end of the flow guide 1101 away from the hollow tube body is in contact with the inner bottom wall of the outer shell.

[0051] In this embodiment, both inner side walls of each oil inlet channel 1102 are curved surfaces. There is preferably only one oil inlet channel 1102, which can minimize the oil inlet area, is conducive to forming negative pressure in the first channel, and enhances the oil pumping effect.

[0052] In this embodiment, the end of the threaded mandrel 10 away from the impeller 1001 extends to the end of the hollow rotor shaft 9 close to the scroll compression mechanism. The threads on the threaded mandrel 10 have a flow guiding effect, which is beneficial to improving the oil pumping effect.

[0053] In this embodiment, a connecting seat is also included, and the connecting seat is provided with a mounting hole; the hollow sleeve 11 includes a hollow tube body and a flow guide 1101, and the flow guide 1101 has an oil inlet channel 1102 connected to the inner cavity of the hollow tube body, and the inner cavity of the hollow tube body is connected to the inner cavity of the hollow rotor shaft 9; the end of the hollow rotor shaft 9 close to the oil pool is sleeved in the mounting hole and rotatably connected to the connecting seat, one end of the hollow tube body is fixedly connected to one end of the flow guide 1101, and the other end of the hollow tube body passes through the mounting hole and is sleeved in the hollow rotor shaft 9, the connecting seat is fixedly connected to the end of the shell close to the oil pool, and the flow guide 1101 is arranged between the connecting seat and the shell, and the connecting seat can press the flow guide 1101 onto the shell. The hollow sleeve 11 is connected to the shell through the pressing effect of the connecting seat, which simplifies the structure.

[0054] In this embodiment, the scroll compression mechanism includes an active scroll 6, a transmission component 13 and a driven scroll 5. The active scroll 6 and the driven scroll 5 are both connected to the transmission component 13. The active scroll 6 is connected to the hollow rotor shaft 9. The hollow rotor shaft 9 can drive the active scroll 6 to rotate around the central axis of the active scroll 6. The active scroll 6 can drive the driven scroll 5 to rotate around the central axis of the driven scroll 5 through the transmission component 13. The active scroll 6 is provided with at least one first guide hole 601 and at least one second guide hole 602. The axis of each first guide hole 601 is aligned with the hollow rotor shaft 9. The axes of the second guide holes 602 are perpendicular to each other, and the axes of the second guide holes 602 are parallel to the axis of the hollow rotor shaft 9; the first guide holes 601 are connected to the inner cavity of the hollow rotor shaft 9, and the second guide holes 602 are connected to the first guide holes 601, and the second guide holes 602 penetrate the end surface of the active scroll 6 close to the transmission component 13 and the end surface away from the transmission component 13; the lubricating liquid can enter the first guide holes 601 from the inner cavity of the hollow rotor shaft 9 and enter between the active scroll 6 and the driven scroll 5 through the second guide holes 602, and the lubricating liquid can return to the oil pool through the second guide holes 602 under the action of gravity. The lubricating fluid entering the first guide hole 601 can enter the second guide hole 602 under the action of the centrifugal force generated by the rotation of the active worm wheel, and a part of the lubricating fluid enters between the active scroll 6 and the driven scroll 5 along the second guide hole 602 to lubricate the friction pair of the scroll compression mechanism, and a part of the lubricating oil can flow back to the oil pool along the second guide hole 602 under the action of gravity to achieve recycling.

[0055] In this embodiment, the scroll compression mechanism also includes a hollow air intake end cover 8, which is fixedly connected to the outer shell and divides the inner cavity of the outer shell into an upper cavity and a lower cavity. The scroll compression mechanism and the driving mechanism are respectively arranged in the upper cavity and the lower cavity. The hollow rotor shaft 9 is rotatably connected to the air intake end cover 8, and the inner cavity of the hollow rotor shaft 9, the inner cavity of the air intake end cover 8 and the first guide hole 601 can be connected in sequence; at least one through hole 801 is provided on the air intake end cover 8, and both ends of each through hole 801 are connected to the upper cavity and the lower cavity. The lubricating fluid can enter the driving mechanism through the second guide hole 602 and the through hole 801 under the action of gravity, and the lubricating fluid can return to the oil pool through the second guide hole 602 and the through hole 801 under the action of gravity.

[0056] In this embodiment, the scroll compression mechanism also includes an exhaust end cover 4 and a hollow driven shaft 14. The exhaust end cover 4 is fixedly connected to the housing and divides the upper cavity into an exhaust cavity and a compression cavity. The scroll compression mechanism is arranged in the compression cavity. The driven shaft 14 is connected to the exhaust end cover 4 through a bearing. The driven scroll plate 5 is fixedly connected to the driven shaft 14. The driven scroll plate 5 is provided with a compression cavity exhaust port 501. The compression cavity exhaust port 501, the inner cavity of the driven shaft 14 and the exhaust cavity are connected in sequence. The lubricating oil can enter the upper end of the driven shaft 14 through the compression cavity exhaust port 501 and the inner cavity of the driven shaft 14, and move to between the driven shaft 14 and the exhaust end cover 4 under the action of centrifugal force, thereby lubricating the rotating pair between the driven shaft 14 and the exhaust end cover 4.

[0057] In this embodiment, the central rotation axes of the active scroll 6 and the driven scroll 5 have a fixed eccentricity, and the eccentricity is the designed rotation radius of the scroll. The active scroll 6 and the driven scroll 5 can form a compression working chamber.

[0058] In this embodiment, a hollow driving shaft 7 is also included. The active scroll 6 is connected and fixed to the driving shaft 7 by bolts through a flange structure, and a sealing ring is provided between the flange structure and the driving shaft 7. The driving shaft 7 is connected and fixed to the hollow rotor shaft 9 through a transmission key, and the driving shaft 7 is rotatably connected to the intake end cover 8. The hollow rotor shaft 9 is connected to the base housing 3 through a bearing and is connected and fixed to the rotor 12. When the rotor 12 rotates, it drives the hollow rotor shaft 9 and the driving shaft 7 to rotate, and the driving shaft 7 drives the active scroll 6 to rotate, and then drives the driven scroll 5 to rotate.

[0059] In this embodiment, the connecting seat is a bearing seat 17, the hollow rotor shaft 9 is connected to the bearing seat 17 through a bearing, the bearing seat 17 is fixedly connected to the base shell 3 through bolts, and the bearing seat 17 can press and fix the hollow sleeve 11 on the base shell 3. During the operation of the compressor, the hollow sleeve 11 and the base shell 3 are relatively stationary, the threaded core shaft 10 and the hollow sleeve 11 rotate relatively, the threaded structure 1002 on the threaded core shaft 10 cooperates with the hollow sleeve 11 to form a screw pump structure, and the impeller 1001 is arranged on the threaded core shaft 10, and the two are interference fit and remain relatively stationary. The oil inlet channel 1102 is connected to the oil pool, and the impeller 1001 on the threaded core shaft 10 rotates in the guide body 1101 on the hollow sleeve 11, and the two cooperate to form an oil pump structure, so as to pump the lubricating liquid in the oil pool to the inner cavity of the hollow sleeve 11.

[0060] In this embodiment, the hollow rotor shaft 9 is of variable diameter design, with a larger inner diameter at one end close to the oil pool and a smaller inner diameter at one end close to the scroll compression mechanism. The threaded core shaft 10 is interference fit with the hollow rotor shaft 9 through the thread structure 1002. The inner diameter of the hollow sleeve 11 is of variable diameter design, and its inner diameter gradually increases from bottom to top.

[0061] In this embodiment, the driving mechanism further includes a motor housing 16 and a stator 15 and a rotor 12 disposed in the motor housing 16. The stator 15 is connected to the motor housing 16. The rotor 12 is sleeved in the stator 15 and can generate relative rotation with the stator 15 under the action of the stator 15.

[0062] In this embodiment, the housing includes an exhaust housing 1, an air intake housing 2, and a base housing 3 which are fixedly connected in sequence from top to bottom. The bottom of the base housing 3 protrudes outward to form an oil pool. The exhaust housing 1 and the exhaust end cover 4 form an exhaust cavity, and the exhaust end cover 4, the air intake housing 2, and the air intake end cover 8 form a compression cavity, and the lower cavity is a motor cavity.

[0063] In this embodiment, the scroll compressor 100 adopts a working medium cooling motor, and the working medium enters through the air inlet hole set on the air inlet housing 2, flows through the driving mechanism, and enters the compression working chamber through the through hole 801 set on the air inlet end cover 8. After the compression is completed, the working medium flows into the hollow driven shaft 14 through the compression chamber exhaust port 501 set on the driven scroll plate 5, and finally is discharged through the exhaust port 101 on the exhaust housing 1.

[0064] The scroll compressor 100 provided in this embodiment is a self-rotating scroll compressor 100, and the active scroll 6 and the driven scroll 5 rotate at the same speed and in the same direction during operation, and there is an eccentric distance between the rotation centers of the two. Since the two scrolls of the self-rotating scroll compressor 100 rotate, the side wall of the compression chamber only has a strong shear acceleration motion on the working fluid in the near-wall area, and the disturbance to the working fluid in the mainstream area is small; the orbital translation of the scroll teeth of the orbiting scroll compressor 100 causes the working fluid in the mainstream area inside the compression chamber to generate strong disturbance kinetic energy. In comparison, the self-rotating scroll compressor 100 has a small pressure energy loss and a higher compression efficiency.

[0065] The scroll compressor 100 uses lubricating oil to cool and lubricate the scroll compression mechanism and the driving mechanism, and its working process is as follows:

[0066] The lubricating oil is stored in the oil pool formed by the base shell 3; when the compressor is working, the lubricating oil flows into the central area of ​​the base shell 3 through the oil inlet channel 1102 of the guide body 1101 on the fixed sleeve; the threaded core shaft 10 drives the impeller 1001 to rotate and cooperates with the guide body 1101 to form an oil pump structure, and the lubricating oil is pumped into the threaded structure 1002 area set on the threaded core shaft 10; the threaded structure 1002 of the threaded core shaft 10 and the fixed sleeve form a screw pump structure, so that the lubricating oil moves toward the compression chamber and enters the scroll compressor 100 mechanism through the first guide hole 601 and the second guide hole 602 set on the hollow rotor shaft 9, the driving shaft 7, and the active scroll plate 6, so as to achieve lubrication and cooling of the mechanical structure in the scroll compressor 100 mechanism; the lubricating oil can enter the driving mechanism below through the second guide hole 602 and the through hole 801 set on the intake end cover 8, so as to achieve lubrication and cooling of the driving mechanism, and finally return to the oil pool in the base shell 3.

[0067] Example 2

[0068] This embodiment provides a scroll compressor 100, in which the transmission component 13 is a transmission slip ring.

[0069] In this embodiment, two first protrusions 1301 and two second protrusions 1302 are arranged on one end face of the transmission slip ring, the two first protrusions 1301 are arranged opposite to each other in the radial direction of the transmission slip ring, and the two second protrusions 1302 are arranged opposite to each other in the radial direction of the transmission slip ring, and two first key grooves 603 and two second key grooves are arranged on the active scroll 6 and the driven scroll 5 respectively; the two first protrusions 1301 are arranged in the two first key grooves 603 respectively, and cooperate with the two first key grooves 603 respectively, so that the active scroll 6 and the transmission slip ring move relative to each other during the working process, and the relative movement is a translation with a relative displacement changing in a sine curve; the two second protrusions 1302 are arranged in the two second key grooves respectively, and cooperate with the two second key grooves respectively, so that the driven scroll 5 and the transmission slip ring move relative to each other during the working process, and the relative movement is a translation with a relative displacement changing in a sine curve. The connecting line of the two first key grooves 603 and the connecting line of the two second key grooves are perpendicular to each other. During the operation of the compressor, the active scroll 6 drives the driven scroll 5 to move through the transmission slip ring, and the two rotate at the same speed and there is a certain eccentricity at the center of rotation, which is the designed rotation radius of the scroll. The lubricating fluid can lubricate the friction pair between the transmission slip ring, the driven scroll 5 and the active scroll 6.

[0070] The other structures and connection relationships of this embodiment are the same as those of Embodiment 1.

[0071] Example 3

[0072] This embodiment provides a scroll compressor 100, in which the transmission component 13 is a transmission pin assembly.

[0073] In this embodiment, the transmission pin assembly includes a plurality of transmission pins, preferably 6, and the driven scroll 5 is provided with a plurality of transmission pin grooves 502 in the radial direction, preferably 6, one end of each transmission pin is fixedly connected to the active scroll 6, and the other end of each transmission pin is arranged in a transmission pin groove 502. The driven scroll 5 cooperates with the transmission pin through the transmission pin groove 502, and the relative motion between the driven scroll 5 and the transmission pin during the working process is a circular motion along the transmission pin groove 502. The active scroll 6 is provided with 6 pin fixing holes 604 in the radial direction, and the active scroll 6 and the transmission pin are interference fit through the pin fixing holes 604, and the active scroll 6 and the transmission pin are relatively stationary during the working process. During the working process of the compressor, the active scroll 6 drives the driven scroll 5 to move through the transmission pin, and the active scroll 6 and the driven scroll 5 perform self-rotation motion at a constant speed and there is a certain eccentricity at the rotation center, and the eccentricity is the designed rotation radius of the scroll. The lubricating liquid can lubricate the friction pair between the transmission pin and the transmission pin groove 502 .

[0074] The other structures and connection relationships of this embodiment are the same as those of Embodiment 1.

[0075] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A scroll compressor, characterized in that: It comprises a housing and a scroll compression mechanism, a driving mechanism, a hollow sleeve and a screw rotor body arranged in the housing, wherein: An oil pool is provided at one end of the housing; The scroll compression mechanism is arranged at the other end of the housing, and the scroll compression mechanism has a lubricating liquid inlet; The driving mechanism comprises a hollow rotor shaft, the hollow rotor shaft is arranged between the scroll compression mechanism and the oil pool, and the hollow rotor shaft is connected to the scroll compression mechanism; One end of the hollow sleeve is fixedly connected to one end of the housing close to the oil pool, and the other end of the hollow sleeve is sleeved inside one end of the hollow rotor shaft close to the oil pool; The screw rotor body is sleeved in the hollow sleeve, and the screw rotor body is connected to the hollow rotor shaft. The driving mechanism can drive the screw rotor body to rotate around its own axis through the hollow rotor shaft; the screw rotor body can pump the lubricating fluid in the oil pool into the inner cavity of the hollow sleeve and enter the lubricating fluid inlet through the inner cavity of the hollow rotor shaft by rotating around its own axis, so as to lubricate the scroll compression mechanism.

2. The scroll compressor according to claim 1, characterized in that: The screw rotor body includes a threaded core shaft and at least one impeller, the outer wall of the threaded core shaft is provided with threads, the threaded core shaft is sleeved in the hollow sleeve, the threaded core shaft is fixedly connected to the hollow rotor shaft, and the driving mechanism can drive the threaded core shaft to rotate around its own axis through the hollow rotor shaft; each impeller is fixedly connected to one end of the threaded core shaft close to the oil pool.

3. The scroll compressor according to claim 1, characterized in that: At least one oil inlet channel is provided on the outer wall of one end of the hollow sleeve close to the oil pool, and the oil inlet channel is communicated with the inner cavity of the hollow sleeve, and the inner cavity of the hollow sleeve is communicated with the inner cavity of the hollow rotor shaft.

4. The scroll compressor according to claim 3, characterized in that: Both inner side walls of each of the oil inlet channels are curved surfaces, and there is only one oil inlet channel.

5. The scroll compressor according to claim 3, characterized in that: It also includes a connecting seat, which is provided with a mounting hole; the hollow sleeve includes a hollow tube body and a flow guide body, the flow guide body has the oil inlet channel connected to the inner cavity of the hollow tube body, and the inner cavity of the hollow tube body is connected to the inner cavity of the hollow rotor shaft; one end of the hollow rotor shaft close to the oil pool is sleeved in the mounting hole and rotatably connected to the connecting seat, one end of the hollow tube body is fixedly connected to one end of the flow guide body, the other end of the hollow tube body passes through the mounting hole and is sleeved in the hollow rotor shaft, the connecting seat is fixedly connected to one end of the shell close to the oil pool, the flow guide body is arranged between the connecting seat and the shell, and the connecting seat can press the flow guide body against the shell.

6. The scroll compressor according to claim 2, characterized in that: The threaded core shaft extends from one end away from the impeller to one end close to the scroll compression mechanism.

7. The scroll compressor according to claim 1, characterized in that: The scroll compression mechanism includes an active scroll, a transmission component and a driven scroll, wherein the active scroll and the driven scroll are both connected to the transmission component, the active scroll is connected to the hollow rotor shaft, the hollow rotor shaft can drive the active scroll to rotate around the central rotation axis of the active scroll, and the active scroll can drive the driven scroll to rotate around the central rotation axis of the driven scroll through the transmission component; the active scroll is provided with at least one first guide hole and at least one second guide hole, and the axis of each of the first guide holes is aligned with the axis of the hollow rotor shaft The second guide holes are perpendicular to each other, and the axis of each second guide hole is parallel to the axis of the hollow rotor shaft; each first guide hole is connected to the inner cavity of the hollow rotor shaft, and each second guide hole is connected to the first guide hole, and each second guide hole passes through the end surface of the active scroll close to the transmission component and the end surface away from the transmission component; the lubricating fluid can enter each first guide hole from the inner cavity of the hollow rotor shaft and enter between the active scroll and the driven scroll through the second guide hole, and the lubricating fluid can return to the oil pool through the second guide hole under the action of gravity.

8. The scroll compressor according to claim 7, characterized in that: The transmission component is a transmission slip ring or a transmission pin assembly.

9. The scroll compressor according to claim 7 or 8, characterized in that: The scroll compression mechanism also includes a hollow air intake end cover, which is fixedly connected to the shell and divides the inner cavity of the shell into an upper cavity and a lower cavity. The scroll compression mechanism and the driving mechanism are respectively arranged in the upper cavity and the lower cavity. The hollow rotor shaft is rotatably connected to the air intake end cover, and the inner cavity of the hollow rotor shaft, the inner cavity of the air intake end cover and the first guide hole can be connected in sequence; at least one through hole is provided on the air intake end cover, and both ends of each through hole are connected to the upper cavity and the lower cavity. The lubricating fluid can enter the driving mechanism through the second guide hole and the through hole under the action of gravity, and the lubricating fluid can return to the oil pool through the second guide hole and the through hole under the action of gravity.

10. The scroll compressor according to claim 9, characterized in that: The scroll compression mechanism also includes an exhaust end cover and a hollow driven shaft. The exhaust end cover is fixedly connected to the outer shell and divides the upper cavity into an exhaust chamber and a compression chamber. The scroll compression mechanism is arranged in the compression chamber. The driven shaft is rotatably connected to the exhaust end cover, and the driven scroll plate is fixedly connected to the driven shaft. The driven scroll plate is provided with a compression chamber exhaust port, and the compression chamber exhaust port, the inner cavity of the driven shaft and the exhaust chamber are connected in sequence.

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