CN108331752A - Electromechanical double-acting screw compressor - Google Patents

Abstract

The invention discloses an electromechanical double-moving scroll compressor, which comprises a fixedly connected front casing, an intermediate casing, a rear casing, a motorized disk, an electric disk, a double scroll static disk, a motor assembly, and a pulley assembly. The rear casing is provided with an end cover, and the motor assembly is located in the rear casing. The motor assembly includes a motor stator, a motor rotor, and a motor rotation shaft. The motor stator is fixed in the rear housing, and the motor rotor is fixed on the motor rotation shaft. The scroll compressor proposed by the present invention enables the compressor to freely switch between the two power sources of the engine and the motor through the setting of its double-scroll rotating and stationary disks, which improves the practicability of the scroll compressor and broadens the scope of use. scope of its use.

Description

Electromechanical double-acting scroll compressor

technical field

The invention relates to the technical field of refrigeration scroll compressors, in particular to an electromechanical double-acting scroll compressor.

Background technique

There are two scrolls in the rotary compressor: a moving scroll and a fixed scroll. The center of the movable scroll is driven by the main shaft to make a circular motion around the center of the fixed scroll. This movement generates compression between the two scrolls, and the low-pressure gas enters the suction chamber. With the movement of the movable scroll, the compression is a continuous process. , in the second circular motion a part of the gas is compressed, another part of the gas is entering the scroll, and another part of the gas is being discharged. The gas in this chamber gradually decreases, and when this chamber reaches the center, which is the exhaust port, the pressure reaches the maximum, which has gone through three complete circular movements, thereby achieving the purpose of the compressor.

The scroll compressor is small in size and light in weight, and the eccentric shaft driving the moving turbine can rotate at high speed. Because there is no suction valve and discharge valve, the scroll compressor operates reliably, and it is easy to realize variable speed movement and variable displacement technology. Multiple compression chambers work at the same time, the gas pressure difference between adjacent compression chambers is small, the gas leakage is small, and the volumetric efficiency is high. Scroll compressors are widely used in industry, agriculture, transportation, medical equipment, food decoration, textile and other industries and other occasions that require compressed air due to their compact structure, high efficiency and energy saving, low vibration and low noise, and working reliability.

But the existing scroll compressor can only work by electric drive, and if it is used in a car, it will be powered by a generator or storage battery on the car; it cannot be directly driven by a diesel engine, gasoline engine or other power machinery. Affected the scope of application of the scroll compressor.

If a large truck uses an electric scroll compressor, it must be powered by a battery for a long time to work, and the burden on the battery will be heavy, which will affect the service life. If there is an electromechanical double-acting scroll compressor, when the large truck is driving, the power of the engine can be used to directly drive the electromechanical double-acting scroll compressor to work; The double-acting scroll compressor works, which can greatly reduce the work load of the battery.

Common scroll compressor designs such as Chinese patent documents CN201711284161.8, CN201710938165.7, CN201710788797.X, etc., corresponding improvements have been made to the intake, exhaust and noise reduction of common scroll compressors in the above patent documents , but the improvement of the transmission mode of the scroll compressor, so that it can make better use of the power of the car when it is mounted on the car, is not involved in this aspect.

Contents of the invention

In view of the problems existing in the background technology, the purpose of the present invention is to provide a new type of scroll compressor that is more suitable for large trucks. The compressor can be powered by the on-board battery or switched to the engine to directly provide power, reducing the The work burden of the storage battery and the reasonable use of the kinetic energy of the engine itself have the advantages of increasing the practical life of the storage battery and improving the fuel utilization rate of large trucks.

The object of the invention is achieved by the following technical act:

An electromechanical double-moving scroll compressor is characterized in that it includes a fixedly connected front casing, an intermediate casing, a rear casing, a motorized disk, an electric disk, a double scroll static disk, a motor assembly, and a pulley assembly. The rear housing is provided with an end cover, the motor assembly is located in the rear housing, the motor assembly includes a motor stator, a motor rotor, and a motor rotating shaft, the motor stator is fixed in the rear housing, and the motor rotor It is fixed on the rotating shaft of the motor, and the double-scroll static disk is an involute-shaped scroll tooth-shaped cavity with protrusions on both ends, and the double-scroll static disk is fixed in the middle housing. Both ends of the double-scroll static disk are provided with air outlet sink holes, and the side of the double-scroll static disk is provided with two radial air outlet holes, and the radial air outlet holes are respectively connected to the corresponding air outlet sink holes. The starting sections of the spiral tooth chambers on both ends of the double-scroll static disk are provided with air intake sinking grooves, and the outer air outlet pipes corresponding to the radial air outlet holes and the outer air outlet pipes corresponding to the radial air outlet holes are arranged on the middle housing. The external air intake pipe corresponding to the air intake sinking tank, the structure of the motorized disc and the electric disc corresponds to the double scroll static disc, and both of them are provided with a raised involute spiral tooth-shaped protrusion on the single end surface One end of the rotating shaft of the motor is rotatably fixed on the end cover, the other end of the rotating shaft of the motor is fixedly connected to the back of the electric disk, and the electric disk is located in the front housing. The pulley assembly includes a pulley and a pulley shaft, the pulley is connected to the engine output shaft through a transmission belt, one end of the pulley shaft is fixedly connected to the pulley, and the other end of the pulley shaft is fixed to the back of the motorized disc, Both the rotating shaft of the motor and the pulley shaft are provided with eccentric sections.

In the present invention, the protruding involute spiral teeth of the electric disk or the motor disk go deep into the involute spiral tooth cavity of the double-scroll static disk, and on the rotating shaft of the motor or the shaft of the pulley Under the constraints of the eccentric section, the motor rotating shaft or the pulley shaft drives the electric disc or motorized disc to perform eccentric circular motion relative to the center of the double scroll static disc.

In the present invention, the eccentric configurations of the motorized disk, the electric disk and the double-scroll stationary disk are 180 degrees different.

Implementing the electromechanical double-acting scroll compressor in the present invention has the following beneficial effects: the electromechanical double-acting scroll compressor can be driven by electricity, and can also be directly driven by a gasoline engine, a diesel engine or other power machinery, and the scope of application is large. Increase. Especially for large-scale trucks, if the electromechanical double-acting scroll compressor of the present invention is installed, the engine power is used to drive the electromechanical double-acting scroll compressor to work to cool the driver's cab; The double-acting scroll compressor works to cool the cab, bringing a comfortable environment for truck drivers throughout the journey. The invention is suitable for use in occasions without direct current power supply, and also suitable for use in outdoor occasions driven by diesel engines, especially for large trucks.

Description of drawings

Fig. 1 is a schematic diagram of the main structure of the present invention;

Figure 2 is a schematic diagram of the internal structure of Figure 1;

Fig. 3 is a schematic diagram of the structure of the double scroll stationary disk in Fig. 1;

Fig. 4 is a schematic cross-sectional view of Fig. 3;

Fig. 5 is a schematic diagram of the external structure of the present invention;

Fig. 6 is the structural representation of electromagnetic clutch among the present invention;

FIG. 7 is a schematic structural diagram of the electric disk in FIG. 1 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

In the prior art, "Research on Scroll Compressors for Automobile Air Conditioners" (Wuhan University of Technology. Jiang Yi 2006) researched the application of scroll compressors in the field of vehicle air conditioners, focusing on several types of anti-rotation mechanisms. The advantages and disadvantages of several anti-rotation mechanisms are compared in terms of structural form, working principle and design ideas. It can be seen that the application of scroll compressors in the automotive field has great development prospects, but this article does not address the impact of the car's own power on the scroll compressor. The compressor has been improved in terms of transmission.

In order to solve the deficiencies in the existing design, this program proposes an electromechanical double-acting scroll compressor as shown in Figures 1 to 7, including a fixedly connected front casing 11, a middle casing 12, a rear casing 13 and a motorized Disk 2, electric disk 3, double-scroll static disk 4, motor assembly 5, pulley assembly 6; the overall layout of the above structure is clearly marked in the attached drawing 1. The rear casing 13 is provided with an end cover 131, and the motor assembly 5 is located in the rear casing 13. The motor assembly 5 includes a motor stator 51, a motor rotor 52, and a motor rotating shaft 53. The motor stator 51 is fixed in the rear casing 13, and the motor rotor 52 is fixed on the motor rotating shaft 53; the motor assembly is directly powered by the vehicle battery, and then drives the rotation of the rotating shaft. The double-scroll static disc 4 is an involute-shaped scroll tooth-shaped cavity 41 with protrusions on both ends. The double-scroll static disc 4 is fixed in the middle housing 12. Both ends of the double-scroll static disc 4 are provided with air outlets. Counterbore 42, two radial air outlet holes 43 are provided on the side of the double-scroll static disk 4, and the radial air outlet holes 43 respectively penetrate to the corresponding air outlet counterbore 42. The starting section of the tooth cavity is provided with an air intake sinking groove 44 . Compared with the unilateral scroll stationary disk in the existing design, the two end faces of the double scroll stationary disk are provided with involute scroll chambers for matching with the movable scroll, and the two ends of the double scroll stationary disk Corresponding to electric disc and motorized disc respectively. The intermediate housing 12 is provided with an external air outlet pipe 121 corresponding to the radial air outlet hole 43 and an external air intake pipe 122 corresponding to the air intake sink 44; the setting of the intermediate housing is also one of the differences from the existing design , in the existing design, the front and rear shells are fixedly connected by the fixed scroll, but in this scheme, a separate middle shell used to accommodate the double scroll stationary disc is set separately, the purpose of which is also to allow the intake of the stationary disc , The exhaust mechanism is independently arranged on the middle casing, which is more suitable for the complete assembly of the compressor.

The structure of the motorized disc 2 or the electric disc 3 corresponds to the double-scroll static disc 4, as shown in Figure 7, both of which are provided with a raised involute-shaped scroll-shaped convex cavity on the end surface of one side; the electric disc 3 Or the protruding involute spiral teeth of the motor disk 2 go deep into the involute spiral tooth-shaped cavity of the double scroll stationary disk 4 . The eccentric configurations of the electric disk, the motor disk and the double-scroll static disk all differ by 180°. One end of the motor rotating shaft 53 is rotatably fixed on the end cover 131 , and the other end of the motor rotating shaft 53 is fixedly connected with the back side of the electric disk 3 , and the electric disk 2 is located in the front housing 11 . The specific structure of pulley assembly 6 can refer to Fig. 2, comprises pulley 61, pulley shaft 62, and pulley 61 is connected to engine output shaft through transmission belt, and pulley shaft 62 one ends are fixedly connected with pulley 61, and the other end of pulley shaft is connected with motorized disk 2. The back side is fixed, and the motor rotating shaft 53 and the pulley shaft 62 are all provided with eccentric sections. Under the constraint of the eccentric section of the motor rotating shaft 53 or the pulley shaft 62, the motor rotating shaft or the pulley shaft drives the electric disc or the motor disc to perform an eccentric circular motion relative to the center of the double scroll static disc, through the eccentricity generated between the moving disc and the static disc Circular motion completes the three strokes of intake, compression, and exhaust. The refrigerant gas enters the compressor from the external intake pipe, passes through the intake sink 44 on the double-scroll static disc, and enters the working area of the dynamic and static discs; When the electric scroll compressor is partly working, the motor drives the motor rotating shaft to drive the electric disk to rotate in the involute spiral tooth cavity of the double-scroll static disk, and the compressed gas formed passes through the gas outlet sink of the double-scroll static disk. The hole 42 is discharged from the radial air outlet through the external air outlet pipe 121; when the motor scroll compressor is partly working, the pulley drives the pulley shaft to rotate under the action of external power, and drives the motor disk in the involute shape of the double scroll static disk. Rotational movement in the cavity of the spiral tooth.

In this scheme, the double-scroll static disc shown in Figure 3 is a cylindrical structure with raised involute scroll tooth cavity on both end plates, and the involute scroll tooth cavity on both sides The cavity wall may be provided with a radial hole leading to the air outlet valve; both the electric disc and the motor disc have a disc-shaped structure with a protruding involute spiral cavity on one side.

In the specific implementation of this solution, the depth of the involute spiral tooth cavity on the double scroll stationary disc 4, the electric disc 3 and the motor disc 2 depends on the design of the displacement of the scroll compressor. The depth is directly proportional to the displacement of the compressor. Therefore, the setting of the middle casing 12 in this solution also facilitates the change of the displacement of the compressor in the later stage. When the displacement of the compressor needs to be increased, it is necessary to replace a The middle casing suitable for measuring the dynamic and static scroll is enough, and the front and rear casings do not need to be replaced.

As a further optimization of this scheme, the electromechanical double-acting scroll compressor pulley assembly 6 as shown in Figure 6 can be equipped with an electromagnetic clutch 7, and the electromagnetic clutch 7 is controlled by the air conditioner switch, thermostat, air conditioner amplifier, pressure switch, etc. Switch on or off the power transmission between the engine and the compressor when needed. In addition, when the compressor is overloaded, it can also play a certain protective role. The electromagnetic coil 71 of the electromagnetic clutch 7 is fixed on the shell of the compressor, and an additional driving disc 72 is connected with the output shaft 73 of the motor, and the belt pulley 61 is installed on the compressor head cover by a bearing 74, and can rotate freely. When the air conditioner switch is turned on, the current passes through the electromagnetic coil 71 of the electromagnetic clutch 7, and the electromagnetic coil generates electromagnetic attraction force, so that the driving disc 72 is combined with the pulley 61, and the torque of the engine is transmitted to the pulley shaft 62 in the compressor. When the air conditioner switch is turned off, the suction force of the electromagnetic coil disappears, and the driving disc and the pulley are disengaged under the action of the spring plate, and the compressor stops working.

In this solution, a temperature sensor 8 and a pressure sensor 9 are set on the compressor casing as shown in Figure 5, and when the working temperature or working pressure of the compressor is abnormal, the power supply of the motor is automatically cut off by the automatic control device 10, or the Automatic control device 19 controls electromagnetic clutch 7 to stop the work of pulley shaft.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (3)

1. a kind of electromechanical double-acting screw compressor, which is characterized in that including the procapsid, middle casing, back casing being fixedly connected And moving plate, electronic disk, the quiet disk of binary vortices, electric machine assembly, pulley assembly, the back casing are equipped with end cap, the motor Component is located in the back casing, and the electric machine assembly includes motor stator, rotor, electric machine rotational axis, and the motor is fixed Son is fixed in the back casing, and the rotor is fixed on the electric machine rotational axis, and the quiet disk of binary vortices is both ends Face has the involute-type vortex tooth form chamber of protrusion, the quiet disk of binary vortices to be fixed in the middle casing, the binary vortices Quiet disk both ends of the surface are equipped with outlet counterbore, set that there are two radial venthole, the radial direction ventholes in the quiet disc side of binary vortices Penetrated through respectively to corresponding outlet counterbore, the starting point section of the spiral type tooth cavity of the quiet disk both ends of the surface of binary vortices be equipped with into Gas deep gouge, the middle casing be equipped with external escape pipe corresponding with the radial venthole and with the air inlet deep gouge Corresponding external feed stream pipe, the moving plate, electronic dish structure are corresponding with the quiet disk of the binary vortices, are that unilateral end face is set There are the involute-type vortex tooth form convex shaped chamber of protrusion, described electric machine rotational axis one end to be rotatably fixed on the end cap, The other end of the electric machine rotational axis is fixedly connected with the back side of the electronic disk, and the moving plate is located in the procapsid, The pulley assembly includes belt pulley, pulley shaft, and the belt pulley is connected to engine output shaft, the band through driving belt Wheel shaft one end is fixedly connected with the belt pulley, and the other end of the pulley shaft and the back side of the moving plate are mutually fixed, described Electric machine rotational axis and pulley shaft are equipped with eccentric segment.

2. electromechanical double-acting screw compressor according to claim 1, which is characterized in that the electronic disk or moving plate protrusion Involute-type scroll wrap be deep into the quiet disk involute-type vortex tooth form intracavitary of binary vortices, in the electric machine rotational axis or pulley shaft Eccentric segment constraint under, drive electronic disk or moving plate to do bias with respect to the quiet disk center of binary vortices by electric machine rotational axis or pulley shaft Circular motion.

3. electromechanical double-acting screw compressor according to claim 1, which is characterized in that the moving plate and the electronic disk 180 degree is differed with the eccentric configuration of the quiet disk of the binary vortices.