CN216842199U - Scroll compressor shafting balance structure, scroll compressor and air conditioner - Google Patents

Abstract

The utility model provides a scroll compressor shafting balanced structure, scroll compressor, air conditioner, scroll compressor shafting balanced structure wherein, which comprises a crankshaft, move the vortex dish, the upper bracket, it has the driving disk bearing frame to move the vortex dish, the bent axle eccentric part that the bent axle has can rotate the cartridge in the driving disk bearing frame, the sleeve mating holes has been constructed on the upper bracket, still include balance sleeve, balance sleeve has hole and excircle, wherein, the driving disk bearing frame can rotate the cartridge in the hole, balance sleeve can rotate the cartridge in the sleeve mating holes, the centre of a circle of excircle and the centre of a circle of the center of rotation coincidence of bent axle and hole do not coincide with the centre of a circle of excircle. According to the utility model, the mass of the balancing block can be selected to be smaller, thereby reducing the deformation of the crankshaft and reducing the vibration and noise of the compressor; in addition, the overturning probability of the movable scroll can be effectively reduced, the operation stability of the pump body is improved, and the efficiency of the compressor is improved.

Description

Scroll compressor shafting balance structure, scroll compressor and air conditioner

Technical Field

The utility model belongs to the technical field of the compressor is made, concretely relates to scroll compressor shafting balanced structure, scroll compressor, air conditioner.

Background

The scroll compressor is composed of a closed shell, a static scroll, a movable scroll, a bracket, an eccentric crankshaft, an anti-rotation mechanism and a motor. The molded lines of the movable scroll plate and the fixed scroll plate are spiral, the movable scroll plate is eccentric relative to the fixed scroll plate and is installed at a 180-degree difference, and therefore a plurality of crescent-shaped spaces are formed between the movable scroll plate and the fixed scroll plate. The movable scroll plate takes the center of the fixed scroll plate as a rotation center and does non-autorotation rotary translation with a certain rotation eccentric radius, the outer ring crescent space continuously moves towards the center, at the moment, the refrigerant is gradually pushed to the center space, the volume of the refrigerant is continuously reduced, the pressure is continuously increased until the refrigerant is communicated with the central exhaust hole, and the high-pressure refrigerant is discharged out of the pump body to finish the compression process.

The scroll compressor is a displacement compressor which eccentrically moves, and generates centrifugal force during rotation, resulting in vibration and noise, and therefore, a dynamic balance design is required for the entire rotational system. The conventional technology is that the shafting sets up balancing weight/balancing piece, offsets out the driving disk centrifugal force, realizes that the compressor operates steadily, needs to adopt the great balancing weight/balancing piece of quality to balance the driving disk centrifugal force.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a scroll compressor shafting balanced structure, scroll compressor, air conditioner can overcome and need adopt great balancing weight to carry out balanced not enough to the centrifugal force that moves the vortex dish among the correlation technique.

In order to solve the problem, the utility model provides a scroll compressor shafting balanced structure, include the bent axle, move vortex dish, upper bracket, it has the driving disk bearing frame to move the vortex dish, the bent axle eccentric portion that the bent axle has rotatably the cartridge in the driving disk bearing frame, be constructed with the sleeve mating holes on the upper bracket, still include balanced sleeve, balanced sleeve has hole and excircle, wherein, the driving disk bearing frame rotatably the cartridge in the hole, balanced sleeve rotatably the cartridge in the sleeve mating holes, the centre of a circle of excircle with the center of rotation coincidence of bent axle just the centre of a circle of hole with the centre of a circle of excircle does not coincide.

In some embodiments, the straight shaft section of the crankshaft is rotatably supported on the upper bracket by a first sliding bearing.

In some embodiments, a straight shaft section of the crankshaft is sleeved with a motor rotor, one shaft end of the motor rotor is connected with a first balance weight, and/or the other shaft end of the motor rotor is connected with a second balance weight.

In some embodiments, a third counterweight is sleeved on the straight shaft section of the crankshaft.

In some embodiments, the third counterweight is disposed on a straight shaft section between the upper bracket and the motor rotor.

In some embodiments, the third counterweight includes a sleeve that is sleeved with the straight shaft section, and the third counterweight is connected with the straight shaft section through the sleeve.

In some embodiments, the crankshaft has an oil passage extending axially therethrough, the oil passage having an oil outlet at a first axial end of the crankshaft, the first axial end being an axial end of the crankshaft within the movable disc bearing seat.

The utility model also provides a scroll compressor, including foretell scroll compressor shafting balanced structure.

The utility model also provides an air conditioner, including foretell scroll compressor.

The utility model provides a scroll compressor shafting balanced structure, scroll compressor, air conditioner, the hole with the outer periphery wall cooperation of driving disk bearing frame, the excircle then with the upper bracket passes through the cooperation of sleeve mating holes, the bent axle is rotatory to pass through the drive of bent axle eccentric part the vortex dish revolution translation, the vortex dish that moves drives the balance sleeve is rotatory, because the center of rotation of balance sleeve and the center of rotation coincidence of bent axle, the balance sleeve cover is in the driving disk bearing frame reunion the combination of bent axle eccentric part three together form a non-eccentric cylinder, so unbalanced mass on the shafting only the vortex tooth on the base plate of the vortex dish that moves and the base plate, the unbalanced motion quality that needs the balance is reduced to make the rotation of shafting more steady, the quality that needs the balance piece can be selected littleer, the deformation of the crankshaft, the vibration and the noise of the compressor are reduced; in addition, the movable disk bearing seat is sleeved with the balance sleeve, the balance sleeve can also be supported on the movable scroll plate, the overturning of the movable scroll plate can be effectively reduced, the operation stability of the pump body is improved, and the efficiency of the compressor is improved.

Drawings

Fig. 1 is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a balance sleeve in a shafting balance structure of a scroll compressor according to an embodiment of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line A-A in FIG. 3;

FIG. 5 is an assembly view of the balance structure of the scroll compressor shafting according to the present invention;

FIG. 6 is a schematic view showing an internal structure of the upper bracket of FIG. 1;

FIG. 7 is a schematic cross-sectional view taken along line B-B in FIG. 1;

fig. 8 is a schematic structural diagram corresponding to embodiment 1 of the present invention;

fig. 9 is a schematic structural diagram according to embodiment 2 of the present invention;

fig. 10 is a schematic structural diagram according to embodiment 3 of the present invention;

fig. 11 is a schematic structural diagram according to embodiment 4 of the present invention;

fig. 12 is a schematic structural view corresponding to embodiment 5 of the present invention.

The reference numbers are given as:

1. a scroll compressor; 2. a compression mechanism; 3. a driving portion; 4. a motor; 5. a fixed scroll; 6. a movable scroll; 6a, a movable disc bearing seat; 7. a cross slip ring; 8. an upper bracket; 8a, a sleeve fitting hole; 8b, an inner hole of the main bearing of the upper bracket; 9. an upper cover; 10. a housing; 11. a balance sleeve; 11a, an inner hole; 11b, an outer circle; 12. a moving disc sliding bearing; 13. a crankshaft; 13a, a crankshaft eccentric part; 14. a thrust plate; 15. a first sliding bearing; 16. a third counterweight; 17. a motor rotor; 18. a motor stator; 19. a first weight; 19a, a second weight; 20. a secondary bearing cover plate; 21. a lower bracket; 22. a second bearing; 23. an oil return pipe; 24. an oil supply mechanism; 25. a lower cover; 26. oil storage tank.

Detailed Description

Referring to fig. 1 to 12 in combination, according to an embodiment of the present invention, there is provided a scroll compressor shafting balance structure, including a crankshaft 13, a movable scroll 6, and an upper bracket 8, wherein the movable scroll 6 has a movable disc bearing seat 6a, a crankshaft eccentric portion 13a of the crankshaft 13 is rotatably inserted into the movable disc bearing seat 6a, a sleeve mating hole 8a is configured on the upper bracket 8, the scroll compressor shafting balance structure further includes a balance sleeve 11, the balance sleeve 11 has an inner hole 11a and an outer circle 11b, wherein the movable disc bearing seat 6a is rotatably inserted into the inner hole 11a, the balance sleeve 11 is rotatably inserted into the sleeve mating hole 8a, the center of the outer circle 11b coincides with the rotation center of the crankshaft 13 and the center of the inner hole 11a does not coincide with the center of the outer circle 11b (the two eccentricity is equal to the theoretical value, the actual engineering has tolerance requirement), that is, an eccentric design structure is arranged between the inner hole 11a and the outer circle 11 b. In the technical scheme, the inner hole 11a is matched with the outer circumferential wall of the movable disc bearing seat 6a, the outer circle 11b is matched with the upper bracket 8 through the sleeve matching hole 8a, the crankshaft 13 rotates and drives the movable scroll 6 to make orbital translation through the crankshaft eccentric part 13a, the movable scroll 6 drives the balance sleeve 11 to rotate, the balance sleeve 11 is sleeved on the movable disc bearing seat 6a and then combined with the crankshaft eccentric part 13a to form a non-eccentric cylinder, as the rotation center of the balance sleeve 11 is superposed with the rotation center of the crankshaft 13, the balance sleeve 11 is sleeved on the movable disc bearing seat 6a, and thus, only the substrate of the movable scroll 6 and the scroll teeth on the substrate are unbalanced mass on a shafting, the unbalanced motion mass needing balancing is reduced, the rotation of the shafting is more stable, and the mass needing the balancing mass can be selected to be smaller, the deformation of the crankshaft 13, the vibration and the noise of the compressor are reduced; in addition, the cover is established outside the driving disk bearing frame 6a the balance sleeve 11 can also reach support in move the effect of vortex dish 6, can effectively reduce move the toppling of vortex dish 6, promote pump body operating stability, improve compressor efficiency.

In some embodiments, the straight shaft section of the crankshaft 13 is rotatably supported on the upper bracket 8 by a first sliding bearing 15, so that the operational wear of the crankshaft 13 and the upper bracket 8 can be reduced while the positional reliability of the crankshaft 13 is ensured.

The cover is equipped with electric motor rotor 17 on the straight shaft section of bent axle 13, and on the basis of aforementioned technical scheme, it is further, be connected with first balancing piece 19 and/or on another shaft end of electric motor rotor 17 is connected with first balancing piece 19a to can further carry out accurate balance to the shafting, and can understand, this moment first balancing piece 19 and first balancing piece 19 a's quality all can be selected littleer in the aspect of the space occupation, and specific setting position can be confirmed according to specific dynamic balance test, the utility model discloses no longer describe repeatedly.

As another possible embodiment, the straight shaft section of the crankshaft 13 is sleeved with the third weight 16, and the third weight 16 may be disposed independently, that is, not disposed at the same time as the first weight 19 and the first weight 19a, or may be disposed at the same time as one or both of the first weight 19 and the first weight 19a, so as to achieve dynamic balance of multiple points in the axial direction of the crankshaft 13, so as to achieve better balance effect. In a specific implementation, the third counterweight 16 is disposed on a straight shaft section between the upper bracket 8 and the motor rotor 17.

In some embodiments, the third weight 16 includes a sleeve sleeved on the straight shaft section, and the third weight 16 and the straight shaft section are connected (e.g., interference fit) through the sleeve, so that the setting angle of the third weight 16 can be precisely adjusted.

In some embodiments, the crankshaft 13 has a lubricating oil channel penetrating in the axial direction thereof, the lubricating oil channel has an oil outlet at a first shaft end of the crankshaft 13, and the first shaft end is the shaft end of the crankshaft 13 located in the movable disc bearing seat 6a, so that lubricating oil pumped in the lubricating oil channel can enter the matching part between the balance sleeve 11 and the movable disc bearing seat 6a and the matching part between the balance sleeve 11 and the sleeve matching hole 8a through the movable disc bearing seat 6a, thereby realizing sufficient lubrication of a rotating pair, and effectively reducing wear and heat accumulation.

The utility model also provides a scroll compressor, including foretell scroll compressor shafting balanced structure.

The technical solution of the present invention will be further explained with reference to fig. 1 to 10.

Example 1:

as shown in fig. 1, a scroll compressor 1 accommodates a compression mechanism 2 and a drive section 3 in a sealed container which is composed of an upper cover 9, a housing 10 and a lower cover 25. The compression mechanism 2 is composed of a fixed scroll 5, a movable scroll 6, and a oldham ring 7. The drive section 3 is mainly composed of a motor 4 and a crankshaft 13. During the operation of the scroll compressor, the movable scroll 6 is driven by the driving part 3 to rotate and is meshed with the fixed scroll 5 to form a crescent-shaped compression cavity. Along with the rotation of the crankshaft 13, the refrigerant enters the compression mechanism 2, the movable scroll 6 makes continuous rotary translation and keeps a good meshing state all the time, the suction cavity is continuously pushed towards the center, the volume is continuously reduced, and the pressure in the cavity is continuously increased. When the compression reaches a preset compression ratio, the refrigerant is discharged from a central exhaust port of the fixed scroll 5, enters the space of the upper cover of the sealed container, enters the space of the motor 4 through an exhaust channel of the fixed scroll 5 and the upper bracket 8, cools the motor 4, is discharged out of the scroll compressor 1, and enters an air conditioning system to complete the refrigeration/heating cycle.

As shown in fig. 2, for the structure of the balance sleeve 11 of the present invention, the core feature is that the inner hole 11a and the outer circle 11b of the balance sleeve 11 are designed to be eccentric structures, i.e. the center of the inner hole 11a is not concentric with the outer circle 11 b.

As shown in fig. 3, the shaft system of the present invention integrally includes the orbiting scroll 6 and the balance sleeve 11, the third balance block 16 and the motor rotor 17 are assembled on the crankshaft 13, and the first balance block 19 is assembled on the motor rotor 17. As shown in fig. 4 and 5, the inner hole 11a is fitted to the orbiting scroll 6, and the outer circle 11b is fitted to the sleeve fitting hole 8a of the upper bracket 8. The motor 4 rotates to drive the crankshaft 13 to rotate, and the crankshaft eccentric part 13a drives the movable scroll 6 to make orbital translation. The movable scroll 6 drives the balance sleeve 11 to rotate, and the key characteristic is that the rotation center of the balance sleeve 11 is the same as that of the crankshaft 13 and is concentric with the inner hole 8b of the main bearing of the upper bracket.

As shown in fig. 6, a typical arrangement of the balance structure on the shafting according to the present invention is shown. The same side and opposite side position relation of each part in the view is distinguished by the rotation central axis of the crankshaft 13 and the crankshaft eccentric part 13 a. The movable scroll 6 and the inner hole 11a of the balance sleeve 11 are on the same side as the crankshaft eccentric portion 13a, and the third balance block 16 is fixed to the crankshaft 13 on the opposite side of the crankshaft eccentric portion 13 a. The first weight 19 is fixed to the lower end of the motor rotor 17 and is on the same side as the crankshaft eccentric 13 a. After the eccentric mechanisms are arranged in this way, the resultant force and resultant moment balance is met by calculating the centrifugal force and the moment of each eccentric part, and finally the specific size of the designed structure achieves the effect of dynamic balance.

The utility model discloses a structure provides an effectual shafting balanced structure for high-speed scroll compressor, realizes shafting dynamic balance. Compare conventional balanced design, can effectively reduce each balance mechanism's quality, reduced centrifugal force, reduce the bent axle and warp, promote slide bearing reliability, reduce compressor vibration and noise. And the structure increases the supporting position of the movable scroll plate, can restrict and limit the overturning trend of the movable scroll plate, enhances the operation stability of the pump body, improves the sealing effect of the movable scroll plate and the fixed scroll plate, avoids the leakage of the pump body and improves the efficiency of the compressor.

The above is a specific typical embodiment of the present invention, and the core idea of the utility model is briefly expressed. Through the utility model discloses a dynamic balance design effect when shafting balanced structure reaches the high-speed operation of scroll compressor prevents that the high-speed rotation of compressor is bent axle deformation, reduces the complete machine vibration, improves reliability and compressor noise performance.

Example 2:

as shown in fig. 7, a second embodiment of the present invention is provided.

The same side and opposite side positional relation of each part in the drawing are distinguished by the rotation central axis of the crankshaft 13 and the crankshaft eccentric part 13 a. The movable scroll 6 and the inner hole 11a of the balance sleeve 11 are on the same side as the crankshaft eccentric part 13a, and the third balance block 16 is fixed on the upper end of the motor rotor 17 on the opposite side of the crankshaft eccentric part 13 a. The first weight 19 is fixed to the lower end of the motor rotor 17 and is on the same side as the crankshaft eccentric 13 a. After the eccentric mechanisms are arranged in this way, the resultant force and resultant moment balance is met by calculating the centrifugal force and the moment of each eccentric part, and finally the specific size of the designed structure achieves the effect of dynamic balance.

Example 3:

as shown in fig. 8, a third embodiment of the present invention is provided.

The same side and opposite side positional relation of each part in the drawing are distinguished by the rotation central axis of the crankshaft 13 and the crankshaft eccentric part 13 a. The movable scroll 6 and the inner hole 11a of the balance sleeve 11 are on the same side as the crankshaft eccentric portion 13a, and the third balance block 16 is fixed to the crankshaft 13 on the opposite side of the crankshaft eccentric portion 13 a. The first weight 19 is fixed on the upper end of the motor rotor 17 and is on the same side as the crankshaft eccentric 13 a. After the eccentric mechanisms are arranged in this way, the resultant force and resultant moment balance is met by calculating the centrifugal force and the moment of each eccentric part, and finally the specific size of the designed structure achieves the effect of dynamic balance.

Example 4:

as shown in fig. 9, a fourth embodiment of the present invention is provided.

The same side and opposite side positional relation of each part in the drawing are distinguished by the rotation central axis of the crankshaft 13 and the crankshaft eccentric part 13 a. The movable scroll 6 and the inner hole 11a of the balance sleeve 11 are on the same side as the crankshaft eccentric portion 13a, and the third balance block 16 is fixed to the crankshaft 13 on the opposite side of the crankshaft eccentric portion 13 a. The first weight 19 is fixed to the lower end of the motor rotor 17 and is on the same side as the crankshaft eccentric 13 a. The third weight 19a is fixed to the upper end of the motor rotor 17 at the opposite side from the crankshaft eccentricity 13 a. After the eccentric mechanisms are arranged in this way, the resultant force and resultant moment balance is met by calculating the centrifugal force and the moment of each eccentric part, and finally the specific size of the designed structure achieves the effect of dynamic balance.

Example 5:

as shown in fig. 10, a fifth embodiment of the present invention is provided.

The same side and opposite side positional relation of each part in the drawing are distinguished by the rotation central axis of the crankshaft 13 and the crankshaft eccentric part 13 a. The movable scroll 6 and the inner hole 11a of the balance sleeve 11 are on the same side as the crankshaft eccentric portion 13a, and the third balance block 16 is fixed to the crankshaft 13 on the opposite side of the crankshaft eccentric portion 13 a. The first weight 19 is fixed to the lower end of the motor rotor 17 at the opposite side to the crankshaft eccentric 13 a. The third counterweight 19a is fixed to the upper end of the motor rotor 17 on the same side as the crankshaft eccentric 13 a. After the eccentric mechanisms are arranged in this way, the resultant force and resultant moment balance is met by calculating the centrifugal force and the moment of each eccentric part, and finally the specific size of the designed structure achieves the effect of dynamic balance.

The utility model also provides an air conditioner, including foretell scroll compressor.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A shafting balance structure of a scroll compressor is characterized by comprising a crankshaft (13), a movable scroll (6) and an upper bracket (8), the movable scroll (6) is provided with a movable disc bearing seat (6a), a crankshaft eccentric part (13a) of the crankshaft (13) is rotatably inserted in the movable disc bearing seat (6a), the upper bracket (8) is provided with a sleeve matching hole (8a) and also comprises a balance sleeve (11), the balance sleeve (11) has an inner bore (11a) and an outer circumference (11b), wherein the movable disc bearing seat (6a) is rotatably inserted into the inner hole (11a), the balance sleeve (11) is rotatably inserted into the sleeve matching hole (8a), the circle center of the excircle (11b) coincides with the rotation center of the crankshaft (13) and the circle center of the inner hole (11a) does not coincide with the circle center of the excircle (11 b).

2. The scroll compressor shafting balancing structure of claim 1, characterized in that the straight shaft section of the crankshaft (13) is rotatably supported on the upper bracket (8) by means of a first sliding bearing (15).

3. The scroll compressor shafting balancing structure according to claim 1, wherein a motor rotor (17) is sleeved on a straight shaft section of the crankshaft (13), and a first balancing block (19) is connected to one shaft end of the motor rotor (17) and/or a second balancing block (19a) is connected to the other shaft end of the motor rotor (17).

4. A balance structure of a scroll compressor shaft system according to any one of claims 1 to 3, wherein a third balance block (16) is sleeved on a straight shaft section of the crankshaft (13).

5. The scroll compressor shafting balancing structure of claim 4, wherein the third balancing mass (16) is arranged on a straight shaft section between the upper bracket (8) and the motor rotor (17).

6. The scroll compressor shafting balancing structure of claim 4, wherein the third balancing mass (16) comprises a sleeve barrel sleeved with the straight shaft section, and the third balancing mass (16) and the straight shaft section are connected through the sleeve barrel.

7. The scroll compressor shafting balancing structure according to claim 1, wherein the crankshaft (13) has a lubrication oil passage running through axially along the crankshaft, the lubrication oil passage has an oil outlet at a first shaft end of the crankshaft (13), the first shaft end being the shaft end of the crankshaft (13) in the movable disc bearing seat (6 a).

8. A scroll compressor including a scroll compressor shaft system balancing structure as claimed in any one of claims 1 to 7.

9. An air conditioner characterized by comprising the scroll compressor of claim 8.

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