阅读说明：本技术 一种用于压缩机泵体的转子-曲轴结构及压缩机 (Rotor-crankshaft structure for compressor pump body and compressor ) 是由 孙民 伦成钢 马晖 张重远 于 2021-10-22 设计创作，主要内容包括：本发明公开了一种用于压缩机泵体的转子-曲轴结构及压缩机,包括转子及曲轴；转子包括转子本体,转子本体的内径上端处设置有第一转子切槽,转子本体的内径下端处设置有第二转子切槽；曲轴包括曲轴本体及曲轴偏心部,曲轴偏心部的外径上端处设置有第一曲轴切槽,曲轴偏心部的外径下端处设置有第二曲轴切槽；转子本体套设在曲轴偏心部的外侧圆周上,转子本体的内壁与曲轴偏心部的外壁互相接触；第一转子切槽与第一曲轴切槽的位置相对应,第二转子切槽与第二曲轴切槽的位置相对应；本发明能够大幅减小压缩机电机转子选配的平衡块重量和高度,从而降低了平衡块转动风阻,减小了功率损耗；提高了压缩机可靠性,并确保了压缩机能力的有效发挥。(The invention discloses a rotor-crankshaft structure for a compressor pump body and a compressor, comprising a rotor and a crankshaft; the rotor comprises a rotor body, a first rotor slot is formed at the upper end of the inner diameter of the rotor body, and a second rotor slot is formed at the lower end of the inner diameter of the rotor body; the crankshaft comprises a crankshaft body and a crankshaft eccentric part, a first crankshaft cutting groove is formed in the upper end of the outer diameter of the crankshaft eccentric part, and a second crankshaft cutting groove is formed in the lower end of the outer diameter of the crankshaft eccentric part; the rotor body is sleeved on the outer circumference of the crankshaft eccentric part, and the inner wall of the rotor body is contacted with the outer wall of the crankshaft eccentric part; the first rotor cutting groove corresponds to the first crankshaft cutting groove in position, and the second rotor cutting groove corresponds to the second crankshaft cutting groove in position; the invention can greatly reduce the weight and height of the balance block selected and matched by the motor rotor of the compressor, thereby reducing the rotating wind resistance of the balance block and reducing the power loss; the reliability of the compressor is improved, and the effective exertion of the capacity of the compressor is ensured.)

1. A rotor-crankshaft structure for a compressor pump body, characterized by comprising a rotor (1) and a crankshaft (2); the rotor (1) comprises a rotor body (11), a first rotor slot (111) is formed in the upper end of the inner diameter of the rotor body (11), and a second rotor slot (112) is formed in the lower end of the inner diameter of the rotor body (11); the crankshaft (2) comprises a crankshaft body (21) and a crankshaft eccentric part (22), a first crankshaft cutting groove (221) is formed in the upper end of the outer diameter of the crankshaft eccentric part (22), and a second crankshaft cutting groove (222) is formed in the lower end of the outer diameter of the crankshaft eccentric part (22);

the rotor body (11) is sleeved on the outer circumference of the crankshaft eccentric part (22), and the inner wall of the rotor body (11) is contacted with the outer wall of the crankshaft eccentric part (22); the first rotor slot (111) corresponds to the first crankshaft slot (221) in position, and the second rotor slot (112) corresponds to the second crankshaft slot (222) in position.

2. A rotor-crankshaft structure for compressor pump bodies, according to claim 1, characterized in that the axial dimension of the first rotor slot (111) is less than or equal to the axial dimension of the first crankshaft slot (221); the axial dimension of the second rotor slot (112) is equal to or less than the axial dimension of the second crankshaft slot (222).

3. The rotor-crankshaft structure for a compressor pump according to claim 1, wherein the first crankshaft cut groove (221) is a circular arc-shaped notch that diametrically inwardly dents an outer diameter upper end of the crankshaft eccentric portion (21); the second crank shaft notch (222) is an arc-shaped notch which radially inwardly dents the outer diameter lower end of the crank shaft eccentric portion (21).

4. A rotor-crankshaft structure for a compressor pump body according to claim 1, characterized in that the first rotor slot (111) and the second rotor slot (112) are both annular slots; the inner diameter of the first rotor slot (111) is larger than the inner diameter of the rotor body (11), and the inner diameter of the second rotor slot (112) is larger than the inner diameter of the rotor body (11).

5. A rotor-crankshaft structure for a compressor pump body according to claim 1, characterized in that a lubricant coating is provided between the inner wall of the rotor body (11) and the outer circumferential surface of the crankshaft eccentric portion (22).

6. A rotor-crankshaft structure for a compressor pump body, characterized by comprising a rotor (1) and a crankshaft (2); the rotor (1) comprises a rotor body (11), and a first rotor cutting groove (111) is formed in the upper end of the inner diameter of the rotor body (11); the crankshaft (2) comprises a crankshaft body (21) and a crankshaft eccentric part (22), and a first crankshaft cutting groove (221) is formed in the upper end of the outer diameter of the crankshaft eccentric part (22);

the rotor body (11) is sleeved on the outer circumference of the crankshaft eccentric part (22), and the inner wall of the rotor body (11) is contacted with the outer wall of the crankshaft eccentric part (22); the first rotor slot (111) corresponds in position to the first crankshaft slot (221).

7. A rotor-crankshaft structure for a compressor pump body, characterized by comprising a rotor (1) and a crankshaft (2); the rotor (1) comprises a rotor body (11), and a second rotor cutting groove (112) is formed in the lower end of the inner diameter of the rotor body (11); the crankshaft (2) comprises a crankshaft body (21) and a crankshaft eccentric part (22), and a second crankshaft cutting groove (222) is formed in the lower end of the outer diameter of the crankshaft eccentric part (22);

the rotor body (11) is sleeved on the outer circumference of the crankshaft eccentric part (22), and the inner wall of the rotor body (11) is contacted with the outer wall of the crankshaft eccentric part (22); the second rotor slot (112) corresponds in position to the second crankshaft slot (222).

8. A compressor comprises a shell, a pump body and a motor; the pump body and the motor are arranged in the shell, and the pump body comprises a rotor-crankshaft structure; characterized in that the rotor-crankshaft structure is a rotor-crankshaft structure for a compressor pump body according to any one of claims 1 to 7, said rotor-crankshaft structure being connected to the rotor of an electric machine.

Technical Field

The invention belongs to the technical field of compressors, and particularly relates to a rotor-crankshaft structure for a compressor pump body and a compressor.

Background

In the use process of the rotor compressor, the compressor generates large vibration in the operation process due to the unbalance of the pump body structure of the compressor, and the stable operation of the compressor is adversely affected. In order to solve the problems, the conventional method adopts a balance block selected and matched with a motor rotor of the compressor to balance the unbalance of the pump body structure, and the measure can better compensate the unbalance of the pump body structure and reduce the vibration of the running of the compressor.

However, this counterweight technique creates new problems while solving the vibration:

firstly, as the motor rotor runs at a high speed, a larger balance block rotation wind resistance appears, and the power loss is increased; secondly, the problem of large oil carrying quantity caused by disturbance of the air flow by the balance block affects the performance and reliability of the system capacity; third, a relatively large crankshaft diameter is required to prevent flexural deformation due to insufficient strength; moreover, the above phenomenon has a particularly great influence on the height of the balance weight and the rotational speed of the compressor.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a rotor-crankshaft structure for a compressor pump body and a compressor, aiming at solving the problems that when a balance block is adopted to balance the unbalance of the pump body structure in the prior art, a larger rotating wind resistance is easy to occur, the power loss is accelerated, the requirement on the shaft diameter of a crankshaft is higher, and the performance and the reliability of the system capacity of the compressor are influenced.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a rotor-crankshaft structure for a compressor pump body, which comprises a rotor and a crankshaft, wherein the rotor is connected with the crankshaft; the rotor comprises a rotor body, a first rotor slot is formed at the upper end of the inner diameter of the rotor body, and a second rotor slot is formed at the lower end of the inner diameter of the rotor body; the crankshaft comprises a crankshaft body and a crankshaft eccentric part, a first crankshaft cutting groove is formed in the upper end of the outer diameter of the crankshaft eccentric part, and a second crankshaft cutting groove is formed in the lower end of the outer diameter of the crankshaft eccentric part;

the rotor body is sleeved on the outer circumference of the crankshaft eccentric part, and the inner wall of the rotor body is contacted with the outer wall of the crankshaft eccentric part; the first rotor slot corresponds to the first crankshaft slot in position, and the second rotor slot corresponds to the second crankshaft slot in position.

Further, the axial dimension of the first rotor slot is less than or equal to the axial dimension of the first crankshaft slot; the axial dimension of the second rotor slot is less than or equal to the axial dimension of the second crankshaft slot.

Furthermore, the first crankshaft cutting groove is an arc-shaped notch which enables the upper end of the outer diameter of the crankshaft eccentric part to be inwards sunken along the diameter direction; the second crankshaft cutting groove is an arc-shaped notch which enables the lower end of the outer diameter of the crankshaft eccentric part to be inwards sunken along the diameter direction.

Furthermore, the first rotor slot and the second rotor slot are both annular slots; the first rotor slot has an inner diameter greater than the inner diameter of the rotor body and the second rotor slot has an inner diameter greater than the inner diameter of the rotor body.

Further, a lubricant coating is provided between the inner wall of the rotor body and the outer circumferential surface of the eccentric portion of the crankshaft.

The invention also provides a rotor-crankshaft structure for the compressor pump body, which comprises a rotor and a crankshaft; the rotor comprises a rotor body, and a first rotor slot is formed in the upper end of the inner diameter of the rotor body; the crankshaft comprises a crankshaft body and a crankshaft eccentric part, and a first crankshaft cutting groove is formed in the upper end of the outer diameter of the crankshaft eccentric part;

the rotor body is sleeved on the outer circumference of the crankshaft eccentric part, and the inner wall of the rotor body is contacted with the outer wall of the crankshaft eccentric part; the first rotor slot corresponds in position to the first crankshaft slot.

The invention also provides a rotor-crankshaft structure for the compressor pump body, which comprises a rotor and a crankshaft; the rotor comprises a rotor body, and a second rotor cutting groove is formed in the lower end of the inner diameter of the rotor body; the crankshaft comprises a crankshaft body and a crankshaft eccentric part, and a second crankshaft cutting groove is formed in the lower end of the outer diameter of the crankshaft eccentric part;

the rotor body is sleeved on the outer circumference of the crankshaft eccentric part, and the inner wall of the rotor body is contacted with the outer wall of the crankshaft eccentric part; the second rotor slot corresponds in position to the second crankshaft slot.

The invention also provides a compressor, which comprises a shell, a pump body and a motor; the pump body and the motor are arranged in the shell, and the pump body comprises a rotor-crankshaft structure; the rotor-crankshaft structure is used for a compressor pump body and is connected with a rotor of a motor.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a rotor-crankshaft structure for a compressor pump body and a compressor, wherein the inner diameter end of a rotor body is provided with a cutting groove, so that the integral mass of a rotor is effectively reduced, and the weight of an unbalanced part of the pump body structure is reduced from the source; the weight of the unbalanced part of the pump body structure can be reduced by correspondingly arranging the crankshaft cutting groove on the eccentric part of the crankshaft; the invention can greatly reduce the weight and height of the balance block selected and matched by the motor rotor of the compressor, thereby reducing the rotating wind resistance of the balance block and reducing the power loss; meanwhile, the problem of large oil carrying capacity caused by the matching of the balance blocks is effectively reduced, and the higher requirement on the shaft diameter of the crankshaft body is reduced, so that the power loss is reduced; the reliability of the compressor is improved, and the effective exertion of the capacity of the compressor is ensured.

Furthermore, the upper end or the lower end of the inner diameter of the rotor body is only provided with the rotor cutting groove, and the upper end or the lower end of the outer diameter of the eccentric part of the crankshaft is correspondingly provided with the crankshaft notch, so that the requirement of a lower exhaust state or an upper exhaust state is met, and the effective sealing length of the rotor is ensured.

Drawings

Fig. 1 is an overall structural schematic view of a rotor-crankshaft structure in embodiment 1;

fig. 2 is a longitudinal sectional view of a rotor in the rotor-crankshaft structure in embodiment 1;

fig. 3 is a schematic view of a crankshaft structure in the rotor-crankshaft structure in embodiment 1;

fig. 4 is an overall structural view of the rotor-crankshaft structure in embodiment 2;

fig. 5 is a longitudinal sectional view of a rotor in the rotor-crankshaft structure in embodiment 2;

fig. 6 is a schematic view of a crankshaft structure in the rotor-crankshaft structure in embodiment 2;

fig. 7 is an overall structural view of a rotor-crankshaft structure in embodiment 3;

fig. 8 is a longitudinal sectional view of a rotor in a rotor-crankshaft structure in embodiment 3;

fig. 9 is a schematic view of a crankshaft structure in the rotor-crankshaft structure in embodiment 3.

Wherein, 1 rotor, 2 crankshaft; 11 a rotor body, 111 a first rotor slot, 112 a second rotor slot; 21 a crankshaft body, 22 a crankshaft eccentric part; 221 a first crankshaft slot and 222 a second crankshaft slot.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a rotor-crankshaft structure for a compressor pump body, which comprises a rotor 1 and a crankshaft 2; the rotor 1 comprises a rotor body 11, a first rotor slot 111 is arranged at the upper end of the inner diameter of the rotor body, and a second rotor slot 112 is arranged at the lower end of the inner diameter of the rotor body 11; the crankshaft 2 comprises a crankshaft body 21 and a crankshaft eccentric part 22, wherein a first crankshaft cutting groove 221 is formed at the upper end of the outer diameter of the crankshaft eccentric part 22, and a second crankshaft cutting groove 222 is formed at the lower end of the outer diameter of the crankshaft eccentric part 22; the rotor body 11 is sleeved on the outer circumference of the crankshaft eccentric part 22, and the inner wall of the rotor body 11 is contacted with the outer wall of the crankshaft eccentric part 22; the first rotor slot 111 corresponds to the first crankshaft slot 221 in position, and the second rotor slot 112 corresponds to the second crankshaft slot 222 in position.

The first crankshaft cutting groove 221 is an arc-shaped notch that radially inwardly recesses the outer diameter lower end of the crankshaft eccentric portion 21; the second crank cutting groove 222 is an arc-shaped notch that radially inwardly recesses the upper end of the outer diameter of the crank eccentric portion 21; in the present invention, the axial dimension of the first rotor slot 111 is equal to or less than the axial dimension of the first crankshaft slot 221; the axial dimension of the second rotor slot 112 is less than or equal to the axial dimension of the second crankshaft slot 222, so that good lubricating and pressure-bearing conditions can be formed between the inner wall of the rotor and the outer wall of the crankshaft eccentric part which are in contact with each other; the first rotor slot 111 and the second rotor slot 112 are both annular slots; the inner diameter of the first rotor slot 111 is larger than the inner diameter of the rotor body 11, and the inner diameter of the second rotor slot 112 is larger than the inner diameter of the rotor body 11.

In the invention, a lubricant layer is arranged between the inner wall of the rotor body 11 and the outer circumferential surface of the crankshaft eccentric part 22, so that good lubrication and pressure bearing are ensured to be formed between the inner wall of the rotor and the outer wall of the crankshaft eccentric part which are in contact with each other.

The invention also provides a compressor, which comprises a shell, a pump body and a motor; the pump body and the motor are arranged in the shell, and the pump body comprises a rotor-crankshaft structure; the rotor-crankshaft structure is used for a compressor pump body and is connected with a rotor of a motor.

According to the rotor-crankshaft structure for the compressor pump body, the upper end and the lower end of the inner diameter of the rotor body are provided with the cutting grooves, so that the overall weight of the rotor is reduced, and the weight of the unbalanced part of the pump body structure is reduced from the source; the weight and the height of the balance block selected and matched with the motor rotor of the compressor are greatly reduced, so that the rotating wind resistance of the balance block is reduced, and the power loss is reduced; meanwhile, the problem of large oil carrying amount caused by the balance block can be reduced; allowing for a thinner crankshaft shaft diameter to be used in order to reduce power losses.

Example 1

As shown in fig. 1 to 3, the present embodiment 1 provides a rotor-crankshaft structure for a compressor pump body, which includes a rotor 1 and a crankshaft 2; the rotor 1 includes a rotor body 11, a first rotor slot 111 is provided at an inner diameter upper end of the rotor body 11, and a second rotor slot 112 is provided at an inner diameter lower end of the rotor body 11.

The crankshaft 2 comprises a crankshaft body 21 and a crankshaft eccentric part 22, wherein a first crankshaft cutting groove 221 is formed at the upper end of the outer diameter of the crankshaft eccentric part 22, and a second crankshaft cutting groove 222 is formed at the lower end of the outer diameter of the crankshaft eccentric part 22; the first crankshaft cutting groove 221 is an arc-shaped notch that radially inwardly recesses the outer diameter lower end of the crankshaft eccentric portion 21; the second crank cutting groove 222 is an arc-shaped notch that radially inwardly recesses the outer diameter upper end of the crank eccentric portion 21.

The rotor body 11 is sleeved on the outer circumference of the crankshaft eccentric part 22, and the inner wall of the rotor body 11 is contacted with the outer wall of the crankshaft eccentric part 22; the first rotor slot 111 corresponds to the first crankshaft slot 221 in position, and the second rotor slot 112 corresponds to the second crankshaft slot 222 in position. It is preferable to provide a lubricant layer between the inner wall of the rotor body 11 and the outer circumferential surface of the crank eccentric portion 22.

In embodiment 1, the first rotor slot 111 and the second rotor slot 112 are both annular slots; the inner diameter of the rotor body 11 is represented by Φ D, the axial length of the first rotor slot 111 is represented by a, and the inner diameter of the first rotor slot 111 is represented by Φ E; the axial length of the second rotor slot 112 is b, and the inner diameter of the second rotor slot 112 is phi F; let the axial dimension of the first crank notch 221 be c, and the axial dimension of the second crank notch 222 be d; the inner diameter Φ E of the first rotor slot 111 is larger than the inner diameter Φ D of the rotor body 11, and the inner diameter Φ F of the second rotor slot 112 is larger than the inner diameter Φ D of the rotor body 11; the axial dimension a of the first rotor slot 111 is equal to or less than the axial dimension c of the first crankshaft slot 221; the axial dimension b of the second rotor slot 112 is equal to or less than the axial dimension d of the second crankshaft slot 222.

In the embodiment 1, the upper end and the lower end of the inner diameter of the rotor body are provided with the cutting grooves, so that the overall weight of the rotor is effectively reduced; simultaneously, the size of the eccentric part of the crankshaft is adjusted to be matched with the rotor; the weight reduction scheme that the cutting grooves are formed in the upper end and the lower end of the inner diameter of the rotor body is beneficial to greatly reducing the weight and the height of a balance block matched with a motor rotor of the compressor, so that the rotating wind resistance of the balance block is reduced, and the power loss is reduced; meanwhile, the problem of large oil carrying amount caused by the balance block can be reduced; allowing for a thinner crankshaft shaft diameter to be used in order to reduce power losses.

Example 2

As shown in fig. 4 to 6, the present embodiment 2 provides a rotor-crankshaft structure for a compressor pump body, and the structure and principle of the rotor-crankshaft structure in the embodiment 2 are substantially the same as those of the rotor-crankshaft structure in the embodiment 1, except that:

the dimensions of the structures in example 1 were adjusted as follows:

the inner diameter Φ E of the first rotor slot 111 is larger than the inner diameter Φ D of the rotor body 11, and the inner diameter Φ F of the second rotor slot 112 is equal to the inner diameter Φ D of the rotor body 11; the axial dimension a of the first rotor slot 111 is equal to or less than the axial dimension c of the first crankshaft slot 221; the axial dimension b of the second rotor slot 112 is equal to 0, and the axial dimension d of the second crank slot 222 is equal to 0.

That is, only the first rotor slot 111 is provided at the inner diameter upper end of the rotor body 11, the first crank slot 221 is provided at the outer diameter upper end of the crank eccentric portion 22, and the first rotor slot 111 corresponds to the position of the first crank slot 221.

In the embodiment 2, the upper end of the inner diameter of the rotor body is provided with the cutting groove, and the upper end of the outer diameter of the eccentric part of the crankshaft is correspondingly provided with the cutting groove of the crankshaft, so that the requirement of the upper exhaust state is met, and the effective sealing length of the rotor is ensured.

Example 3

As shown in fig. 7 to 9, the present embodiment 3 provides a rotor-crankshaft structure for a compressor pump body, and the structure and principle of the rotor-crankshaft structure in the embodiment 3 are substantially the same as those of the rotor-crankshaft structure in the embodiment 1, except that:

the dimensions of the structures in example 1 were adjusted as follows:

the inner diameter Φ E of the first rotor slot 111 is equal to the inner diameter Φ D of the rotor body 11, and the inner diameter Φ D of the second rotor slot 112 greater than Φ F is equal to the inner diameter Φ D of the rotor body 11; the axial dimension a of the first rotor slot 111 is 0, and the axial dimension c of the first crankshaft slot 221 is 0; the axial dimension of the second rotor slot 112 is equal to or less than the axial dimension of the second crankshaft slot 222.

That is, only the second rotor slot 112 is provided at the inner diameter lower end of the rotor body 11, the second crank slot 222 is provided at the outer diameter lower end of the crank eccentric portion 22, and the second rotor slot 112 corresponds to the position of the second crank slot 222.

In the embodiment 3, the lower exhaust state requirement is satisfied and the effective sealing length of the rotor is ensured by only providing the cutting groove at the lower end of the inner diameter of the rotor body and correspondingly providing the crankshaft cutting groove at the lower end of the outer diameter of the crankshaft eccentric part.

According to the rotor-crankshaft structure for the compression pump body, the cutting grooves are formed in the upper end part and the lower end part of the inner diameter of the rotor, so that the overall weight of the rotor is reduced; meanwhile, the size of the eccentric part of the crankshaft is adjusted to be matched with the rotor and connected to form a rotor-crankshaft mutual matching structure; the weight and the height of the balance block selected and matched with the motor rotor of the compressor are greatly reduced, so that the rotating wind resistance of the balance block is reduced, and the power loss is reduced; meanwhile, the problem of large oil carrying amount caused by the balance block can be reduced; allowing for a thinner crankshaft shaft diameter to be used in order to reduce power losses.

In the invention, the upper end part and the lower end part of the inner diameter of the rotor body are provided with the cutting grooves, and different weight reduction requirements are achieved by adjusting the inner diameter and the axial dimension of the cutting grooves and adjusting the numerical values of the inner diameter and the axial dimension of the crankshaft cutting grooves; meanwhile, it is allowed that the inner diameter dimension a of the first rotor slot and the inner diameter dimension b of the second rotor slot on the rotor body and the inner diameter dimension c of the first crank slot and the inner diameter dimension d of the first crank slot corresponding to the crank eccentric portion may not be limited to the requirement that the inner diameter dimension a of the first rotor slot is not more than the inner diameter dimension c of the first crank slot and the inner diameter dimension b of the second rotor slot is not more than the inner diameter dimension d of the first crank slot under special use.

According to the invention, through the weight reduction scheme of cutting the groove at the inner diameter of the upper end part and the lower end part, the weight of the unbalanced part of the pump body structure can be reduced fundamentally; the weight and the height of the balance block selected and matched with the motor rotor of the compressor are greatly reduced, so that the rotating wind resistance of the balance block is reduced, and the power loss is reduced; meanwhile, the problem of large oil carrying amount caused by the balance block can be reduced; allowing for a thinner crankshaft shaft diameter to be used in order to reduce power losses.

The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.