Motor scroll integrated rotating scroll compressor

Abstract

The application discloses a motor scroll disc integrated self-rotation scroll compressor and relates to the technical field of compressors. The compressor comprises an outer shell, two compression mechanisms and two driving mechanisms. The compression mechanisms and the driving mechanisms are installed in the outer shell. The two driving mechanisms are arranged in the upper and lower positions in the outer shell. Each driving mechanism is connected with a compression mechanism. Each driving mechanism drives the corresponding compression mechanism to rotate. The two compression mechanisms are oppositely arranged and located between the two driving mechanisms. The compression mechanism comprises scroll teeth. The two scroll teeth are of the same structure and have eccentric distances. The two scroll teeth are assembled together and have the same rotating speed. An air inlet is formed in the side wall of the outer shell. The side wall of each driving mechanism is provided with a vent hole. An exhaust cavity is arranged in one of the driving mechanisms. The upper end of the driving mechanism is provided with a communication hole which is communicated with the exhaust cavity. The application can effectively reduce the vibration and noise of the compressor and prolong the service life of the compressor.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a self-rotating scroll compressor with integrated motor and scroll plate. Background Technology

[0002] Scroll compressors have advantages such as simple structure, stable operation, low noise, high mechanical efficiency, and high volumetric efficiency, and are widely used in industrial and domestic fields. The basic compression component of a scroll compressor consists of two scroll teeth spaced 180 degrees apart and arranged eccentrically to form a crescent-shaped compression chamber. The working fluid undergoes three processes—intake, compression, and exhaust—within the crescent-shaped working chamber, which undergoes periodic volume changes, to complete the compression process.

[0003] Compared to rotary compressors, self-rotating compressors are smaller, have a higher pressure ratio, lower noise, and higher efficiency. Self-rotating compressors typically use transmission mechanisms such as cross-rings to transmit driving force between the two discs. However, in high-speed, high-pressure applications, mechanical transmission mechanisms inevitably lead to power loss and friction wear during operation, affecting the compressor's lifespan and operating temperature, increasing vibration and noise, and in severe cases, causing compressor failure. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated motor-scroll compressor to solve the problems existing in the prior art, effectively reduce compressor vibration and noise, and improve compressor life.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides an integrated motor-scroll compressor, comprising a housing, two compression mechanisms, and two drive mechanisms. The compression mechanisms and drive mechanisms are all installed within the housing. The two drive mechanisms are arranged vertically within the housing, and each drive mechanism is connected to one of the compression mechanisms. Each drive mechanism drives the corresponding compression mechanism to rotate. The two compression mechanisms are positioned opposite each other and between the two drive mechanisms. Each compression mechanism includes scroll teeth, and the two scroll teeth have identical structures and an eccentricity. The two scroll teeth are cross-assembled together and rotate at the same speed. An air inlet is provided on the side wall of the housing, and vent holes are provided on the side walls of both drive mechanisms. One of the drive mechanisms has an exhaust cavity inside, and a connecting hole communicating with the exhaust cavity is provided at the upper end of the drive mechanism.

[0007] Preferably, the outer casing includes an outlet-side compressor housing, an intermediate connecting compressor housing, and an inlet-side compressor housing arranged in sequence. The outlet-side compressor housing and the intermediate connecting compressor housing are connected by a plurality of circumferentially arranged bolts, and the intermediate connecting compressor housing and the inlet-side compressor housing are connected by a plurality of circumferentially arranged bolts. An air inlet is provided on the side wall of both the outlet-side compressor housing and the inlet-side compressor housing.

[0008] Preferably, the outer casing further includes a compressor exhaust end cover, which is installed on the upper end of the compressor housing on the outlet side by circumferentially arranged bolts. The compressor housing on the outlet side is hollow inside and has an exhaust port at the upper end.

[0009] Preferably, the drive mechanism located within the outlet-side compressor housing includes an outlet-side motor housing, an outlet-side motor stator, an outlet-side stator fixing shaft, and an outlet-side motor rotor. The outlet-side stator fixing shaft is fixed within the outlet-side compressor housing. The outlet-side motor stator is mounted on the outer periphery of the outlet-side stator fixing shaft. The outlet-side motor rotor is circumferentially mounted on the inner wall of the outlet-side motor housing and rotatably connected to the outer periphery of the outlet-side motor stator. The outlet-side stator fixing shaft extends out of the outlet-side motor housing. The drive mechanism located within the intake-side compressor housing includes an intake-side motor housing, an intake-side motor stator, an intake-side stator fixing shaft, and an intake-side motor rotor. The intake-side stator fixing shaft is fixed within the intake-side compressor housing. The intake-side motor stator is mounted on the outer periphery of the intake-side stator fixing shaft. The intake-side motor rotor is circumferentially mounted on the inner wall of the intake-side motor housing and is rotatably connected to the outer periphery of the intake-side motor stator. The intake-side stator fixing shaft extends out of the intake-side motor housing.

[0010] Preferably, the stator fixing shaft on the exhaust side has an exhaust channel inside.

[0011] Preferably, deep groove ball bearings are installed at both ends of the outlet-side stator fixing shaft and both ends of the inlet-side stator fixing shaft.

[0012] Preferably, the vortex teeth located in the compressor housing on the outlet side are outlet-side vortex teeth, and the vortex teeth located in the compressor housing on the inlet side are inlet-side vortex teeth.

[0013] Preferably, the eccentricity between the two vortex teeth is the gyration radius of the vortex teeth.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] 1. In this invention, the integrated motor scroll plate composed of the drive mechanism and the compression mechanism is a self-rotating scroll plate, which reduces the imbalance generated during operation, reduces the vibration and noise generated during operation, and at the same time, the imbalance generated by the rotating parts in the entire shaft system is small, which can achieve operation at high working speed.

[0016] 2. Compared with the revolution-type scroll compressor, the integrated motor-scroll compressor of the present invention has the scroll tooth walls on both sides of the compression chamber moving during operation, which can reduce the friction loss between the working fluid and the compression chamber and improve the working efficiency of the scroll compressor.

[0017] 3. This invention uses two motors to drive two scroll gears respectively, replacing the mechanical transmission mechanism in the traditional self-rotating compressor structure. This avoids the negative impact of friction in the transmission mechanism in high-speed application environments while ensuring the synchronous operation of the two scroll gears.

[0018] 4. In this invention, one end of the vortex tooth is fitted with a fixed motor housing via a deep groove ball bearing, so that the axial clearance of the two vortex teeth is maintained reasonably, preventing the tooth tips and bottoms of the two vortex teeth from colliding with each other during operation and causing deformation of the vortex teeth.

[0019] 5. This invention adopts an air intake scheme at the tail of the motor, and at the same time, multiple hollowed-out parts are made on the outer wall of the motor, which can effectively cool the motor without the need for other cooling devices, significantly reducing the size of the motor and the complexity of the system, and improving the reliability of the motor. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the integrated motor-scroll compressor provided by the present invention;

[0022] Figure 2 A cross-sectional view of the integrated motor-scroll compressor provided by the present invention;

[0023] Figure 3 This is a schematic diagram showing the arrangement of the intake-side scroll plate and the exhaust-side scroll plate in this invention.

[0024] Figure 4 This is a schematic diagram of the exhaust-side scroll disk at an angle in this invention;

[0025] Figure 5 This is a schematic diagram of the exhaust-side scroll disk in this invention from another angle;

[0026] Figure 6 This is a schematic diagram of the intake-side scroll disk at one angle in this invention;

[0027] Figure 7 This is a schematic diagram of the intake-side scroll disk in this invention from another angle;

[0028] In the diagram: 1-Compressor exhaust end cover, 101-Exhaust port, 2-Outlet side compressor housing, 3-Intermediate connecting compressor housing, 4-Inlet side compressor housing, 5-Inlet side scroll plate, 501-Inlet side vent, 502-Inlet side scroll teeth, 503-Inlet side motor housing, 504-Inlet side motor rotor, 6-Outlet side scroll plate, 601-Outlet side vent, 602-Outlet side scroll teeth, 603-Outlet side motor housing, 604-Outlet side motor rotor, 7-Inlet side stator fixing shaft, 701-Inlet side motor stator, 8-Outlet side stator fixing shaft, 801-Outlet side motor stator, 802-Exhaust passage, 9-Deep groove ball bearing. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide an integrated motor-scroll compressor to solve the problems existing in the prior art, effectively reduce compressor vibration and noise, and improve compressor life.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-7As shown, this embodiment provides an integrated motor-scroll compressor, including a housing, two compression mechanisms, and two drive mechanisms. The compression and drive mechanisms are all installed within the housing. The two drive mechanisms are arranged vertically within the housing, and each drive mechanism is connected to a compression mechanism to form an integrated motor-scroll compressor, namely, an inlet-side scroll compressor 5 and an outlet-side scroll compressor 6. Each drive mechanism drives the corresponding compression mechanism to rotate, making the integrated motor-scroll compressor a self-rotating scroll compressor, reducing the imbalance generated during operation, and reducing vibration and noise. Simultaneously, the imbalance generated by rotating components within the entire shaft system is small, enabling operation at high speeds. The two compression mechanisms are arranged opposite each other and located between the two drive mechanisms. Each compression mechanism includes scroll teeth. During operation, the scroll tooth walls on both sides of one compression chamber are in motion, reducing frictional losses between the working fluid and the compression chamber, and improving the efficiency of the scroll compressor. The two scroll teeth... The two scroll gears are identical in structure but have an eccentricity, meaning they are offset by a certain distance and are assembled together at the same speed. Dual motors drive each scroll gear, replacing the mechanical transmission mechanism in traditional self-rotating compressors. This avoids the negative impact of friction in high-speed applications while ensuring synchronous operation of the two scroll gears. An air inlet is located on the side wall of the outer casing, allowing external gas to enter. Vent holes are located on the side walls of both drive mechanisms, allowing gas from inside the outer casing to enter each drive mechanism. One drive mechanism has an exhaust cavity, and its upper end has a connecting hole that aligns with the exhaust cavity, cooling the gas before it is discharged. The motor tail intake design, along with multiple vent holes on the motor's outer wall forming a hollow design, effectively cools the motor without requiring additional cooling devices, significantly reducing motor size and system complexity, and improving motor reliability.

[0033] Specifically, the outer casing includes an outlet-side compressor housing 2, an intermediate connecting compressor housing 3, and an inlet-side compressor housing 4 arranged in sequence. The outlet-side compressor housing 2 and the intermediate connecting compressor housing 3 are connected by multiple circumferentially arranged bolts, and the intermediate connecting compressor housing 3 and the inlet-side compressor housing 4 are connected by multiple circumferentially arranged bolts. Both the outlet-side compressor housing 2 and the inlet-side compressor housing 4 have air inlets on their side walls.

[0034] The outer casing also includes a compressor exhaust end cover 1, which is installed on the upper end of the compressor housing 2 on the outlet side by circumferentially arranged bolts. The compressor housing 2 on the outlet side is hollow inside and forms an exhaust chamber. An exhaust port 101 is provided at the upper end of the compressor housing 2 on the outlet side.

[0035] The drive mechanism located inside the compressor housing 2 on the outlet side includes an outlet side motor housing 603, an outlet side motor stator 801, an outlet side stator fixing shaft 8, and an outlet side motor rotor 604. The outlet side stator fixing shaft 8 is fixed inside the compressor housing 2 on the outlet side. The outlet side motor stator 801 is installed on the outer periphery of the outlet side stator fixing shaft 8. The outlet side motor rotor 604 is circumferentially installed on the inner wall of the outlet side motor housing 603 and is rotatably connected to the outer periphery of the outlet side motor stator 801. The outlet side stator fixing shaft 8 extends out of the outlet side motor housing 603 and is connected to the corresponding compression mechanism through fasteners. Ventilation holes, namely outlet side ventilation holes 601, are provided on the side wall and end face of the outlet side motor housing 603. The drive mechanism located inside the intake side compressor housing 4 includes an intake side motor housing 503, an intake side motor stator 701, an intake side stator fixing shaft 7, and an intake side motor rotor 504. The intake side stator fixing shaft 7 is fixed inside the intake side compressor housing 4. The intake side motor stator 701 is installed on the outer periphery of the intake side stator fixing shaft 7. The intake side motor rotor 504 is circumferentially installed on the inner wall of the intake side motor housing 503 and is rotatably connected to the outer periphery of the intake side motor stator 701. The intake side stator fixing shaft 7 extends out of the intake side motor housing 503 and is connected to the corresponding compression mechanism through fasteners. Ventilation holes, namely exhaust side ventilation holes 601, are provided on the side wall and end face of the intake side motor housing 503.

[0036] The stator fixing shaft 8 on the outlet side has an exhaust channel 802 inside for exhausting gas. The compressed gas enters the hollow shaft and is then discharged. A sealing strip is provided at the interface between the stator fixing shaft 8 on the outlet side and the compressor housing 2 on the outlet side.

[0037] Both ends of the stator fixing shaft 8 on the exhaust side and both ends of the stator fixing shaft 7 on the intake side are equipped with deep groove ball bearings 9. One end of the vortex tooth is engaged with the fixedly installed motor housing 503 on the intake side or motor housing 603 on the exhaust side through the deep groove ball bearing 9 to achieve axial and radial positioning. At the same time, it keeps the axial clearance of the two vortex teeth reasonable and prevents the tooth tip of each vortex tooth from colliding with the bottom of the other vortex tooth during operation, which would cause the vortex tooth to deform.

[0038] The scroll tooth located in the compressor housing 2 on the outlet side is the outlet-side scroll tooth 602, and the scroll tooth located in the compressor housing 4 on the inlet side is the inlet-side scroll tooth 502. The outlet-side scroll tooth 602 and the inlet-side scroll tooth 502 are set on opposite axes and perform eccentric rotational motions respectively. They are driven synchronously by different motors to ensure that the relative speed is always zero under various operating conditions, thus achieving a fixed relative phase difference between the two scroll teeth. Furthermore, there is no transmission between the two scroll teeth, that is, the two scroll teeth rotate at the same speed and have a constant phase difference for compression work. This avoids a series of friction and wear problems caused by traditional self-rotating compressors, effectively reducing compressor vibration and noise and improving compressor life.

[0039] The intake-side scroll gear 502 is bolted to the intake-side motor housing 503 and is driven by a motor consisting of the intake-side motor rotor 504 and the intake-side motor stator 701, rotating on the same axis. The exhaust-side scroll gear 602 is bolted to the exhaust-side motor housing 603 and is driven by a motor consisting of the exhaust-side motor rotor 604 and the exhaust-side motor stator 801, rotating on the same axis.

[0040] Both the exhaust-side vortex tooth 602 and the intake-side vortex tooth 502 adopt a multi-dimensional conjugate curved surface vortex tooth structure.

[0041] The outer edges and middle parts of the exhaust-side scroll tooth 602 and the intake-side scroll tooth 502 extend to the back side and form two coaxially fitted cylindrical cavities. The cavity in the inner ring is used to install bearings and accommodate the exhaust-side stator fixing shaft 8 or the intake-side stator fixing shaft 7. The cavity in the outer ring is used to accommodate the exhaust-side motor rotor 604 or the intake-side motor rotor 504.

[0042] The eccentricity between the two spiral teeth is the radius of rotation of the spiral teeth.

[0043] In this embodiment, the integrated motor-scroll compressor operates with two sets of scroll teeth rotating at the same speed on their respective central shafts, which have a fixed eccentricity. Each scroll tooth is directly driven by a motor on its respective side, with both motors operating synchronously to ensure the same rotational speed. There is no mechanical transmission device between the two scroll teeth. When the two scroll teeth rotate at the same speed with a fixed eccentricity, with one scroll tooth as the reference frame, the relative angular velocity of the other scroll tooth is always zero, while the direction of the eccentricity continuously changes; that is, the reference scroll tooth is fixed while the other scroll tooth translates around the fixed eccentricity.

[0044] The compressor uses a working fluid to cool the motor. The working fluid is introduced through the air inlet on the compressor housing 4 on the air inlet side, enters the internal cavity of the motor housing 503 and the compressor working chamber at the air inlet scroll tooth 502 through the air inlet side vent 501 on the motor housing 503 on the air inlet side, and absorbs heat. Part of the gas that enters the internal cavity of the motor housing 503 on the air inlet side enters the compressor working chamber at the air inlet scroll tooth 502 through the air inlet side vent 501 on the motor housing 503 on the air inlet side. After entering the compressor working chamber, the gas enters the exhaust chamber through the inside of the stator fixed shaft 8 on the exhaust side and is discharged through the exhaust port 101.

[0045] The other gas path is as follows: the working fluid is introduced through the air inlet provided on the air inlet side compressor housing 4, enters the internal cavity of the air outlet side motor housing 603 and the compressor working chamber at the air outlet side scroll tooth 602 through the air outlet side vent 601 on the air outlet side motor housing 603, and absorbs heat. Part of the gas that enters the internal cavity of the air outlet side motor housing 603 then enters the compressor working chamber at the air outlet side scroll tooth 602 through the air outlet side vent 601 on the air outlet side motor housing 603. After entering the compressor working chamber, the gas enters the exhaust chamber through the inside of the air outlet side stator fixed shaft 8 and is discharged through the exhaust port 101.

[0046] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A self-rotating scroll compressor integrating a motor and a scroll plate, characterized in that: The device includes an outer casing, two compression mechanisms, and two drive mechanisms. The compression and drive mechanisms are both installed within the outer casing. The two drive mechanisms are arranged vertically within the outer casing, and each drive mechanism is connected to one of the compression mechanisms. Each drive mechanism drives the corresponding compression mechanism to rotate. The two compression mechanisms are positioned opposite each other and between the two drive mechanisms. Each compression mechanism includes vortex teeth. The two vortex teeth have identical structures and an eccentricity. The two vortex teeth are cross-assembled together and rotate at the same speed. An air inlet is provided on the side wall of the outer casing, and vent holes are provided on the side walls of both drive mechanisms. One of the drive mechanisms has an exhaust cavity inside, and a connecting hole communicating with the exhaust cavity is provided at the upper end of the drive mechanism. The outer casing includes an outlet-side compressor housing, an intermediate connecting compressor housing, and an inlet-side compressor housing arranged in sequence. The compressor housing on the outlet side is hollow inside and has an exhaust port at the top. The drive mechanism located within the compressor housing on the outlet side includes an outlet side motor housing, an outlet side motor stator, an outlet side stator fixing shaft, and an outlet side motor rotor. The outlet side stator fixing shaft is fixed inside the compressor housing on the outlet side. The outlet side motor stator is mounted on the outer periphery of the outlet side stator fixing shaft. The outlet side motor rotor is circumferentially mounted on the inner wall of the outlet side motor housing and is rotatably connected to the outer periphery of the outlet side motor stator. The outlet side stator fixing shaft extends out of the outlet side motor housing. The drive mechanism located within the intake-side compressor housing includes an intake-side motor housing, an intake-side motor stator, an intake-side stator fixing shaft, and an intake-side motor rotor. The intake-side stator fixing shaft is fixed within the intake-side compressor housing. The intake-side motor stator is mounted on the outer periphery of the intake-side stator fixing shaft. The intake-side motor rotor is circumferentially mounted on the inner wall of the intake-side motor housing and is rotatably connected to the outer periphery of the intake-side motor stator. The intake-side stator fixing shaft extends out of the intake-side motor housing. The stator fixing shaft on the exhaust side is provided with an exhaust channel; The scroll teeth located in the compressor housing on the outlet side are outlet-side scroll teeth, and the scroll teeth located in the compressor housing on the inlet side are inlet-side scroll teeth; The intake-side vortex gear is bolted to the intake-side motor housing, and the exhaust-side vortex gear is bolted to the exhaust-side motor housing.

2. The integrated motor-scroll compressor according to claim 1, characterized in that: The outlet compressor housing and the intermediate connecting compressor housing are connected by multiple circumferentially arranged bolts. The intermediate connecting compressor housing and the inlet compressor housing are connected by multiple circumferentially arranged bolts. Both the outlet compressor housing and the inlet compressor housing have air inlets on their side walls.

3. The integrated motor-scroll compressor according to claim 2, characterized in that: The outer casing also includes a compressor exhaust end cover, which is installed on the upper end of the compressor housing on the outlet side by circumferentially arranged bolts.

4. The integrated motor-scroll compressor according to claim 1, characterized in that: Both ends of the stator fixing shaft on the exhaust side and both ends of the stator fixing shaft on the intake side are equipped with deep groove ball bearings.

5. The integrated motor-scroll compressor according to claim 1, characterized in that: The eccentricity between the two vortex teeth is the gyratory radius of the vortex teeth.

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