CN203835719U - Opposite rotating compressor with double rotors - Google Patents

Abstract

The utility model discloses a dual-rotor counter-rotating compressor, which comprises a permanent magnet brushless motor, a first rotor, a second rotor, a first gear, a second gear, a long shaft, a short shaft and a casing. The first rotor passes through a key Installed on the long shaft, the second rotor is installed on the short shaft through a key, there are gear square holes in the middle of the first gear and the second gear, one end of the long shaft is connected with the permanent magnet brushless motor, and the other end is passed through the first gear. The square hole is connected with the first gear, and the short shaft is connected with the second gear through the square hole of the second gear, and the first gear and the second gear mesh with each other; at least one compression end is provided on the periphery of the first rotor, and the periphery of the second rotor is correspondingly There is a compression end for interlocking with the compression end of the first rotor to form a compression cavity or an expansion cavity with the cover plate and the bottom surface of the shell. The utility model uses two rotors to rotate in opposite directions to compress the refrigerant without sliding parts. Simplicity, compression efficiency and maintainability have been greatly improved.

Description

A dual-rotor counter-rotating compressor

technical field

The utility model relates to the field of volumetric compressors, in particular to a dual-rotor counter-rotating compressor. the

Background technique

A positive displacement compressor is a compressor that relies on the reduction of the internal volume of the shell to increase the gas or vapor pressure. The existing positive displacement compressors are generally divided into two categories: reciprocating compressors and rotary compressors. The machine has strong vibration and has reciprocating sliding parts, while the rotary type has certain advantages, but because it generally uses the combination of eccentric wheel rotor and sliding vane, it also has sliding parts, so these two types of positive displacement compressors are easy to operate. Damaged and poorly maintainable. Although other forms of compressor mechanisms do not use sliding parts, they are generally bulky and complicated in mechanism. the

Utility model content

The technical problem to be solved by the utility model is to provide a dual-rotor counter-rotating compressor with small volume, simple structure and no sliding parts for the defects of the background technology. the

The utility model adopts the following technical solutions for solving the above-mentioned technical problems:

A double-rotor counter-rotating compressor, including a permanent magnet brushless motor, a first rotor, a second rotor, a first gear, a second gear, a long shaft, a short shaft and a casing, the casing includes a cover plate and a casing, The inner wall of the cover plate is provided with a bearing connected with the short shaft;

The first rotor is mounted on the long shaft through a key, and the second rotor is mounted on the short shaft through a key. Both the first gear and the second gear are provided with gear square holes, and one end of the long shaft is connected to the permanent shaft. The magnetic brushless motor is connected, and the other end is connected with the first gear through the square hole of the first gear. One end of the short shaft is connected with the second gear through the square hole of the second gear, and the other end is connected with the bearing. The first The first gear meshes with the second gear;

The periphery of the first rotor is provided with at least one compression end, and the periphery of the second rotor is correspondingly provided with a compression end for engaging with the compression end of the first rotor, thereby forming a compression cavity with the cover plate and the bottom surface of the housing. Or the compression end of the expansion chamber, the bottom surface of the housing is correspondingly provided with a suction hole, an exhaust hole, a suction pipe and an exhaust pipe, and the suction pipe and the exhaust pipe are respectively connected to the suction hole, The exhaust holes are connected, a first pressure valve is arranged in the suction pipe, and a second pressure valve is arranged in the exhaust pipe. the

Compared with the prior art by adopting the above technical scheme, the utility model has the following technical effects:

1. Small size and simple structure;

2. Low cost and wide application range;

3. No sliding parts, not easy to damage, long life.

Description of drawings

Figure 1 is the overall view of the compressor;

Figure 2 is an internal view of the compressor;

Fig. 3 is a structural schematic diagram of the core components of the compressor;

Fig. 4 is a bottom view of the housing;

Figure 5 is a top view of the housing;

Fig. 6 is the structural representation of cover plate;

Fig. 7 is a structural schematic diagram of a rotor at the compression end;

Figure 8 is a schematic structural view of the minor axis;

Fig. 9 is a schematic structural view of the major axis;

Fig. 10 is the structural representation of gear;

Figure 11 is a schematic structural view of the bearing;

Figure 12-a to Figure 12-f are schematic diagrams of the bite movement of the compression end;

Fig. 13 is a structural schematic diagram of a rotor with two compression ends;

Fig. 14 is a structural schematic diagram of a rotor with four compression ends;

Fig. 15 is a schematic structural view of a rotor with six compression ends.

Label names in the figure: 1. Permanent magnet brushless motor, 2. Suction pipe, 3. Exhaust pipe, 4. Cover plate, 5. First gear, 6. Housing, 7. Long axis, 7-1, The end face of the first long axis, 7-2, the end face of the second long axis, 7-3, the end face of the third long axis, 7-4, the end face of the fourth long axis, 8, the short axis, 8-1, the end face of the first short axis , 8-2, the end face of the second minor axis, 8-3, the end face of the third minor axis, 8-4, the end face of the fourth minor axis, 9, the first rotor, 10, the gear square hole, 11, the exhaust hole, 12 , suction hole, 13, housing bearing groove, 14, cover plate bearing groove, 15, compression end, 16, shell, 17, bearing, 18, second rotor, 19, second gear, 20, first pressure valve , 21, the second pressure valve. the

Detailed ways

Below in conjunction with accompanying drawing, technical scheme of the present utility model is described in further detail:

As shown in Figures 1 to 11, the utility model discloses a dual-rotor counter-rotating compressor, which includes a permanent magnet brushless motor, a first rotor, a second rotor, a first gear, a second gear, a long shaft, a short A shaft and a casing, the casing includes a cover plate and a housing, the inner wall of the cover plate is provided with a bearing connected to the short shaft;

The first rotor is mounted on the long shaft through a key, and the second rotor is mounted on the short shaft through a key. Both the first gear and the second gear are provided with gear square holes, and one end of the long shaft is connected to the permanent shaft. The magnetic brushless motor is connected, and the other end is connected with the first gear through the square hole of the first gear. One end of the short shaft is connected with the second gear through the square hole of the second gear, and the other end is connected with the bearing. The first The first gear meshes with the second gear;

The periphery of the first rotor is provided with at least one compression end, and the periphery of the second rotor is correspondingly provided with a compression end for engaging with the compression end of the first rotor, thereby forming a compression cavity with the cover plate and the bottom surface of the housing. Or the compression end of the expansion chamber, the bottom surface of the housing is correspondingly provided with a suction hole, an exhaust hole, a suction pipe and an exhaust pipe, and the suction pipe and the exhaust pipe are respectively connected to the suction hole, The exhaust holes are connected, a first pressure valve is arranged in the suction pipe, and a second pressure valve is arranged in the exhaust pipe.

The above-mentioned first rotor and the second rotor have the same geometric shape, and the two rotors rotate in opposite directions to meet the one-to-one correspondence between the engagement of each pair of compression ends. the

When the compression end of the first rotor and the compression end of the second rotor are engaged, a compression cavity and an expansion cavity are formed with the cover plate and the housing. Rotate, the sizes of the two chambers change and transform each other; the lower end of the housing is provided with a suction hole, an exhaust hole, a suction pipe, an exhaust pipe, a first pressure valve and a second pressure valve, and the suction pipe The first pressure valve is connected to the suction hole at the initial position of the new expansion cavity, and the exhaust pipe is connected to the exhaust hole at the final position of the compression cavity through the second pressure valve. the

The long shaft is composed of four end faces, the gear is fixed on the first long shaft end face, the second long shaft end face is in contact with the inner hole surface of the bearing installed on the housing bearing groove, the third long shaft end face is in contact with the bearing outer ring and The surface of the rotor center hole of the first rotor is in contact with the surface to fix the long axis and the first rotor. The end surface of the fourth long axis protrudes from the bearing inner hole on the bearing groove of the cover plate, and the protruding end surface serves as the central axis of the motor. Housing bearing grooves are located at the center of each circle of the housing and use the corresponding groove shape according to the type of bearing used. the

The short shaft is composed of four end faces, the gear is fixed on the end face of the first short shaft, the end face of the second short shaft is in contact with the inner hole surface of the bearing installed on the bearing groove of the housing, and the end face of the third long and short shaft is in contact with the outer ring of the bearing and the second short shaft. The center holes of the two rotors are in contact with each other to fix the short shaft and the second rotor, and the end face of the fourth short shaft is in contact with the inner hole of the bearing on the bearing groove of the cover plate. the

One end of the long shaft is used as the rotating shaft of the motor, the motor rotates to drive the long shaft, the long shaft drives the rotor through the key, the long shaft drives the transmission gear through the square end face, and the gear drive drives the short shaft to rotate, thereby driving the rotor to rotate. the

As shown in Figure 7, Figure 12-a to Figure 12-f, the two rotors rotate in opposite directions, and the compression end on the rotor forms a variable volume with the casing during the rotation of the rotor. The refrigerant in the compressor shown in Figure 12-a to Figure 12-f is separated by the compression end of the rotor, and the volume is compressed while the volume is expanded. When the compression ratio reaches the set range, it is discharged through the exhaust hole, and the other end is in the The pressure decreases during the process of increasing the volume, and the refrigerant outside the cavity enters the cavity through the suction hole under the action of pressure, which is actually a suction process. The refrigerant in Figure 12-a to Figure 12-b is compressed while sucking air, Figure 12-b to Figure 12-c is the process of entering the exhaust gas, and Figure 12-d to Figure 12-e is the engagement of the compression end of the rotor In the transition process, continue to rotate in Fig. 12-f to reach the process in Fig. 12-a, and repeat the rotation in this way to achieve the compression process of the refrigerant. the

As shown in Figures 13 to 15, the number of rotor compression ends is more than one, and the number of compression ends can be selected according to actual engineering needs. When the compression ratio is required to be large, the number of compression ends is selected, and vice versa. In addition, as the number of compression ends increases, the flow continuity of the refrigerant at the outlet of the exhaust hole 11 is good, otherwise the continuity is not good. the

Claims (1)

1. A dual-rotor counter-rotating compressor, characterized in that, comprises a permanent magnet brushless motor, a first rotor, a second rotor, a first gear, a second gear, a long shaft, a short shaft and a casing, and the casing includes A cover plate and a housing, the inner wall of the cover plate is provided with a bearing connected to the short shaft; The first rotor is mounted on the long shaft through a key, and the second rotor is mounted on the short shaft through a key. Both the first gear and the second gear are provided with gear square holes, and one end of the long shaft is connected to the permanent shaft. The magnetic brushless motor is connected, and the other end is connected with the first gear through the square hole of the first gear. One end of the short shaft is connected with the second gear through the square hole of the second gear, and the other end is connected with the bearing. The first The first gear meshes with the second gear; The periphery of the first rotor is provided with at least one compression end, and the periphery of the second rotor is correspondingly provided with a compression end for engaging with the compression end of the first rotor, thereby forming a compression cavity with the cover plate and the bottom surface of the housing. Or the compression end of the expansion chamber, the bottom surface of the housing is correspondingly provided with a suction hole, an exhaust hole, a suction pipe and an exhaust pipe, and the suction pipe and the exhaust pipe are respectively connected to the suction hole, The exhaust holes are connected, a first pressure valve is arranged in the suction pipe, and a second pressure valve is arranged in the exhaust pipe.