阅读说明：本技术 一种压缩机 (A kind of compressor ) 是由 董明珠 魏会军 单彩侠 马鹏 刘双来 于 2020-06-01 设计创作，主要内容包括：本发明提供一种压缩机,其包括：主轴(15),在所述主轴(15)上设置有重心调节机构(7),所述重心调节机构(7)能够随着所述主轴(15)转动,且在所述重心调节机构(7)转动时其重心能产生沿主轴轴向方向的移动。根据本发明能够随着主轴的转动而自动调整重心,能够随压缩机运行频率的变化而产生自适应的动态调整效果,有效减小致压缩机在运行时的振动,自适应降低压缩机轴系重心,使压缩机在高频运行更平稳,振动小噪声低；本发明降低压缩机轴系重心,间接降低压缩机上部的受力,从而减小吸排气管振动,解决压缩机运行时轴系振动大的问题；和解决压缩机运行时振动随频率的升高而大大增大的问题。(The present invention provides a compressor, comprising: the main shaft (15), be provided with focus adjustment mechanism (7) on main shaft (15), focus adjustment mechanism (7) can be along with main shaft (15) rotate, and its focus can produce the removal along main shaft axial direction when focus adjustment mechanism (7) rotate. According to the invention, the gravity center can be automatically adjusted along with the rotation of the main shaft, and the self-adaptive dynamic adjustment effect can be generated along with the change of the running frequency of the compressor, so that the vibration of the compressor during running is effectively reduced, the gravity center of a shaft system of the compressor is reduced in a self-adaptive manner, the compressor runs more stably at high frequency, and the vibration is small and the noise is low; the invention reduces the gravity center of the compressor shafting, indirectly reduces the stress on the upper part of the compressor, thereby reducing the vibration of the suction and exhaust pipe and solving the problem of large shafting vibration when the compressor runs; and solves the problem that the vibration is greatly increased along with the increase of the frequency when the compressor runs.)

1. A compressor, characterized by: the method comprises the following steps:

the main shaft (15), be provided with focus adjustment mechanism (7) on main shaft (15), focus adjustment mechanism (7) can be along with main shaft (15) rotate, and its focus can produce the removal along main shaft axial direction when focus adjustment mechanism (7) rotate.

2. The compressor of claim 1, wherein:

the gravity center adjusting mechanism (7) comprises a shell (7-1), a sliding block (7-2), an elastic component (7-3) and a bottom plate (7-4), the sliding block (7-2) is arranged inside the shell (7-1), the sliding block (7-2) is connected with the elastic component (7-3), and is connected to the bottom plate (7-4) through the elastic component (7-3), the bottom plate (7-4) is fixedly arranged at one end of the shell (7-1), the shell (7-1) is sleeved on the main shaft (15) and can integrally rotate along with the rotation of the main shaft (15), the sliding block (7-2) generates centrifugal deflection when rotating, but can be driven by the housing (7-1) to move in the direction of the resilient member (7-3) upon centrifugal deflection.

3. The compressor of claim 2, wherein:

the inner part of the shell (7-1) is provided with a containing space (70) capable of containing the sliding block (7-2), the side wall of the containing space (70) located on the radial outer side is a first inclined plane (71) pointing to the elastic component (7-3) in a perpendicular mode, a gap is formed between the first inclined plane (71) and the sliding block (7-2) when the main shaft (15) does not rotate, and the sliding block (7-2) is driven by centrifugal force to move towards the first inclined plane (71) when the main shaft (15) rotates, so that the sliding block can be in contact with the first inclined plane (71) and is pressed by the first inclined plane (71).

4. A compressor according to claim 3, wherein:

the side surface of the sliding block (7-2) opposite to the first inclined surface (71) is a second inclined surface (72) which is parallel to the first inclined surface (71) and is perpendicular to the first inclined surface and faces the elastic component (7-3).

5. A compressor according to claim 3, wherein:

the number of the sliding blocks (7-2) is at least two, the sliding blocks (7-2) are arranged along the central line of the main shaft (15) in a central symmetry mode, the number of the elastic parts (7-3) is more than two, the elastic parts are arranged corresponding to the sliding blocks (7-2) one by one, and the number of the accommodating spaces (70) is more than two, and the elastic parts are arranged corresponding to the sliding blocks (7-2) one by one.

6. A compressor according to any one of claims 3 to 5, wherein:

the compressor is a vertical compressor and comprises a pump body part and a motor structure (5), wherein the gravity center adjusting mechanism (7) is arranged below the motor structure (5), and the vertical line of the first inclined plane (71) points downwards to the central line of the main shaft (15) so as to apply downward pressure to the sliding block (7-2).

7. The compressor of claim 6, wherein:

the vertical compressor further comprises a lower support (9), the lower support (9) is also sleeved on the main shaft (15), the lower support (9) is located below the motor structure (5), and the gravity center adjusting mechanism (7) is arranged between the motor structure (5) and the lower support (9) or below the lower support (9).

8. A compressor according to any one of claims 3 to 5, wherein:

the compressor is a vertical compressor and comprises a pump body part and a motor structure (5), wherein the gravity center adjusting mechanism (7) is arranged above the motor structure (5), and the vertical line of the first inclined plane (71) upwards points to the central line of the main shaft (15) so as to apply upward pressure to the sliding block (7-2).

9. A compressor according to any one of claims 3 to 5, wherein:

the compressor is a horizontal compressor and comprises a pump body part and a motor structure (5), wherein the gravity center adjusting mechanism (7) is arranged on one side of the motor structure (5) along the axial direction, and the vertical line of the first inclined plane (71) points to the left or the right of the central line of the main shaft (15) so as to apply pressure to the slider (7-2) to the left or the right.

10. A compressor according to any one of claims 6 to 9, wherein:

the pump body part is a scroll compression assembly, and the compressor is a scroll compressor; and/or the presence of a gas in the gas,

an upper balance block (3) is further arranged at the position of the pump body part, and/or a middle balance block (14) is further arranged between the pump body part and the motor structure (5) and sleeved on the main shaft (15).

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor.

Background

Scroll compressors are widely used in the fields of refrigeration air conditioners, heat pumps and the like due to the characteristics of high efficiency, small size, light weight, stable operation and the like. Generally, a scroll compressor is composed of a sealed housing, a fixed scroll, a movable scroll, a bracket, a main shaft, an anti-rotation mechanism oil supply device and a motor, wherein molded lines of the movable scroll and the fixed scroll are both spiral, the movable scroll is eccentrically installed relative to the fixed scroll by 180 degrees, and a plurality of crescent-shaped spaces are formed between the movable scroll and the fixed scroll. When the movable scroll plate does non-autorotation rotary translation with the center of the fixed scroll plate as a rotation center and a certain rotation 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, so that the compression process is completed.

When the scroll compressor is in operation, the centrifugal inertia force generated by unbalanced masses such as a movable scroll plate can cause the vibration of the whole machine, generate noise, increase energy consumption, accelerate the abrasion of a bearing, reduce the service life of the machine and cause major accidents in severe cases. The method has the advantages that the dynamic disc of the scroll compressor is strictly balanced, the vibration and the noise of the scroll compressor are reduced, the use safety, the reliability, the service life and the efficiency of the scroll compressor are improved, and the performance of low vibration and low noise is ensured. The balance of the movable plate of the scroll compressor plays an important role in the manufacture of the scroll compressor.

The movable vortex disc is eccentrically arranged on the crank pin relative to the main shaft, so that the rotating inertia force of the movable disc generated in the rotation process of the main shaft is necessarily transmitted to the main shaft, the load of the main bearing is increased, and the machine vibration is caused, so that the rotating inertia force and the moment thereof are balanced by adopting a main balance block and an auxiliary balance block under the condition of limited structure.

The main shaft, the balance block and the motor rotor form a shafting component. After the assembly is designed to be produced, the structural characteristics are determined. However, due to the change of operating conditions such as working conditions, rotating speed and the like, the center of gravity of a shaft system needs to be changed sometimes to ensure that the compressor operates more stably, so that vibration and noise generated by the operation of the compressor are reduced.

Patent No. CN208734552U discloses a balance weight for a compressor with adjustable center of gravity. The balancing weight is provided with balancing weights in two directions, and the positions of the balancing weights can be adjusted according to design requirements, so that the gravity center of the balancing weight is adjusted. However, the structure belongs to a static adjusting structure, the gravity center cannot be changed again after the structure is installed in the compressor, and the self-adaptive dynamic adjusting effect generated along with the change of the running frequency of the compressor cannot be realized;

patent No. CN207673542U discloses a balance assembly, a rotor assembly and a compressor. The balancing piece comprises a plurality of counter weight fritters, designs for concatenation mortise and tenon structure, can adopt different mortise and tenon schemes according to the design demand, obtains the balancing piece that the focus is different. The structure also belongs to a static adjusting structure, and the gravity center cannot be changed again after the structure is installed;

patent No. CN208703429U discloses a vibration damping mount and a rotary machine. The structure comprises a base, an adjusting assembly and supporting legs, wherein the compressor is fixed on the supporting legs, and the adjusting assembly enables the center of gravity of the compressor to generate certain change in the operation process by introducing air flow, so that the center of gravity of the compressor is ensured not to deviate, and vibration is reduced. The structure is considered from the whole compressor, has the disadvantages of high control difficulty, more parts and the like, and can weaken the effect of adjusting the center of gravity to a certain extent.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the compressor still has large vibration during operation due to the fact that the structure such as the balance block of the compressor in the prior art cannot realize the self-adaptive dynamic adjustment effect along with the change of the operation frequency of the compressor, so that the compressor is provided.

In order to solve the above problems, the present invention provides a compressor, comprising:

the gravity center adjusting mechanism can rotate along with the main shaft, and the gravity center of the gravity center adjusting mechanism can move along the axial direction of the main shaft when the gravity center adjusting mechanism rotates.

Preferably, the center of gravity adjusting mechanism includes a housing, a slider, an elastic member, and a bottom plate, the slider is disposed inside the housing, the slider is connected to the elastic member and is connected to the bottom plate through the elastic member, the bottom plate is fixedly disposed at one end of the housing, the housing is sleeved on the main shaft and can integrally rotate along with rotation of the main shaft, the slider generates centrifugal deflection during rotation, and can be driven by the housing to move in a direction of the elastic member during centrifugal deflection.

Preferably, an accommodating space capable of accommodating the slider is provided inside the housing, a side wall of the accommodating space located on a radial outer side is a first inclined slope of which a perpendicular line points to the elastic member, a gap is provided between the first inclined slope and the slider when the spindle does not rotate, and the slider is driven by a centrifugal force to move toward the first inclined slope and then to contact with the first inclined slope when the spindle rotates, so that pressure is applied by the first inclined slope.

Preferably, a side surface of the slider opposite to the first inclined surface is a second inclined surface parallel to the first inclined surface and perpendicular to the first inclined surface and facing the elastic member.

Preferably, the number of the sliding blocks is at least two, the sliding blocks are arranged along the central line of the main shaft in a central symmetry manner, the number of the elastic parts is more than two, the elastic parts are arranged in a one-to-one correspondence manner with the sliding blocks, and the number of the accommodating spaces is more than two, and the accommodating spaces are arranged in a one-to-one correspondence manner with the sliding blocks.

Preferably, the compressor is a vertical compressor, and includes a pump body portion and a motor structure, the center of gravity adjusting mechanism is disposed below the motor structure, and a perpendicular line of the first inclined plane is directed downward toward a center line of the main shaft so as to be able to apply downward pressure to the slider.

Preferably, the vertical compressor further includes a lower bracket, the lower bracket is also sleeved on the main shaft, the lower bracket is located below the motor structure, and the gravity center adjusting mechanism is disposed between the motor structure and the lower bracket or below the lower bracket.

Preferably, the compressor is a vertical compressor, and includes a pump body portion and a motor structure, the center of gravity adjusting mechanism is disposed above the motor structure, and a perpendicular line of the first inclined plane points upward to a center line of the main shaft so as to be able to apply upward pressure to the slider.

Preferably, the compressor is a horizontal compressor, and includes a pump body portion and a motor structure, the center of gravity adjusting mechanism is disposed on one side of the motor structure along an axial direction, and a perpendicular line of the first inclined plane points to a center line of the main shaft leftward or rightward so as to be able to apply a leftward or rightward pressure to the slider.

Preferably, the pump body part is a scroll compression assembly, and the compressor is a scroll compressor; and/or an upper balance block is further arranged at the position of the pump body part, and/or a middle balance block is further arranged between the pump body part and the motor structure and sleeved on the main shaft.

The compressor provided by the invention has the following beneficial effects:

1. according to the invention, the center of gravity adjusting mechanism is arranged on the main shaft of the compressor, so that the center of gravity can be automatically adjusted along with the rotation of the main shaft, and a self-adaptive dynamic adjusting effect can be generated along with the change of the operating frequency of the compressor, thereby effectively reducing the vibration of the compressor during operation, lowering the center of gravity of a shaft system of the compressor in a self-adaptive manner, enabling the compressor to operate more stably at high frequency and having less vibration and low noise; the invention reduces the gravity center of the compressor shafting, indirectly reduces the stress on the upper part of the compressor, thereby reducing the vibration of the suction and exhaust pipe and solving the problem of large shafting vibration when the compressor runs; and solve the problem that the vibration increases greatly with the rise of the frequency while the compressor runs;

2. the invention provides a general structure capable of improving the center of gravity of a compressor shafting, wherein a center-of-gravity adjusting mechanism is of a centrosymmetric structure, and can change the axial center of gravity of the shafting without generating an eccentric action; along with the change of the running frequency of the compressor, the structure can change the center of gravity of a shafting; the gravity center adjusting mechanism is arranged on the shafting assembly and integrally operates along with the shafting. Preferably, the bearing is arranged below the motor rotor, and beneficial effects can be generated above or below the auxiliary bearing; the gravity center adjusting mechanism consists of a shell, a sliding block, a spring and a bottom plate; wherein, the sliding blocks are arranged in a central symmetry way; the single sliding block slides under the action of centrifugal force, so that the effect of shafting gravity center self-adaption is generated; the center is symmetrically arranged, so that the resultant force of centrifugal force of the gravity center adjusting mechanism in the radial direction is zero, and no eccentric action is generated.

Drawings

FIG. 1 is a complete set of structural view-a cross-sectional view of the compressor of the present invention;

FIG. 2 is a view showing an assembly structure of a gravity center adjusting mechanism (gravity adaptive block) and a main shaft of the compressor according to the present invention;

FIG. 3 is an exploded view of a gravity center adjusting mechanism (gravity adaptive block) of the compressor of the present invention;

fig. 4 is a front sectional view of a gravity center adjusting mechanism (gravity adaptive block) of the compressor of the present invention;

fig. 5 is a top sectional view of a gravity center adjusting mechanism (gravity adaptive block) of the compressor of the present invention;

fig. 6 is a force diagram of a gravity center adjusting mechanism (gravity adaptive block) of the compressor of the present invention;

FIG. 7 is a force exploded view of the slider of the gravity center adjusting mechanism (gravity adaptive block) of the compressor of the present invention;

FIG. 8 is a schematic diagram of the spring force of the gravity center adjusting mechanism (gravity adaptive block) of the compressor of the present invention;

fig. 9 is a whole structure view-a sectional view (two balance blocks) of the compressor according to embodiment 2 of the present invention;

FIG. 10: embodiment 3 of the invention-a four-slide block gravity center adjusting mechanism structure sketch map;

FIG. 11: embodiment 4 of the invention-a three-slide block gravity center adjusting mechanism structure sketch map and force diagram;

FIG. 12: embodiment 5 of the invention-a six-slide block gravity center adjusting mechanism structure sketch map;

FIG. 13: embodiment 6 of the invention-alternative arrangement of the center of gravity adjustment mechanism;

FIG. 14: embodiment 7 of the invention-another arrangement of the center of gravity adjusting mechanism, the center of gravity is moved up;

FIG. 15: embodiment 8 of the invention-another structure of the center of gravity adjusting mechanism, the center of gravity is moved up;

FIG. 16: the invention is a structural diagram of gravity moment.

The reference numerals are represented as:

1. a compressor; 2. an upper bracket; 3. an upper balance block; 4. an upper bearing; 5. a motor structure; 6. a lower balance weight; 7. a center of gravity adjusting mechanism; 7-1, a shell; 7-2, a sliding block; 7-3, an elastic component; 7-4, a bottom plate; 70. an accommodating space; 71. a first inclined ramp; 72. a second inclined ramp; 8. a lower bearing; 9. a lower bracket; 10. a support leg; 11. a vibration-damping washer; 12. an oil absorption assembly; 13. a housing; 14. a middle balance weight; 15. a main shaft.

Detailed Description

As shown in fig. 1 to 16, the present invention provides a compressor, which includes:

the gravity center adjusting mechanism 7 (also called a gravity center adaptive block) is arranged on the main shaft 15, the gravity center adjusting mechanism 7 can rotate along with the main shaft 15, and the gravity center of the gravity center adjusting mechanism 7 can move along the axial direction of the main shaft when the gravity center adjusting mechanism 7 rotates.

According to the invention, the center of gravity adjusting mechanism is arranged on the main shaft of the compressor, so that the center of gravity can be automatically adjusted along with the rotation of the main shaft, and a self-adaptive dynamic adjusting effect can be generated along with the change of the operating frequency of the compressor, thereby effectively reducing the vibration (especially reducing the electromagnetic noise) of the compressor during operation, and self-adaptively reducing the center of gravity of a shafting of the compressor, so that the compressor can operate more stably at high frequency and has less vibration and noise; the invention reduces the gravity center of the compressor shafting, indirectly reduces the stress on the upper part of the compressor, thereby reducing the vibration of the suction and exhaust pipe and solving the problem of large shafting vibration when the compressor runs; and solves the problem that the vibration is greatly increased along with the increase of the frequency when the compressor runs. The invention enables the gravity center of the shafting to generate self-adaptive change in the operation process of the compressor, and ensures that the compressor operates more stably under the working conditions of high rotating speed and the like.

Fig. 1 illustrates one embodiment of the present invention. A main shaft 15 and a motor structure 5 of a vertical scroll compressor 1 are fixed in a machine body through an upper support 2 and a lower support 9, an upper bearing 4 and a lower bearing 8 play a role of bearing, and the upper support and the lower support are fixed on a shell 13 through welding or interference and the like. When the compressor operates, the motor drives the main shaft to rotate, and the main shaft drives a pump body (not shown) of the scroll compressor to rotate, so that a compression function is realized. The movable scroll plate in the scroll compressor generates centrifugal force during operation due to eccentric arrangement, and a balance structure needs to be designed for balancing the centrifugal force and the centrifugal moment applied to the main shaft, namely an upper balance block 3, a middle balance block 14 and a lower balance block 6 in the multi-balance-block compressor. The gravity center adjusting mechanism 7 is arranged between the motor structure 5 and the lower bracket 9 and is connected to the main shaft 15 in an interference manner.

In the structure of the conventional vertical scroll compressor, the balance blocks can be arranged at a position close to the scroll plate for balancing the centrifugal force of the dynamic scroll plate, and the gravity center of the whole shafting assembly (the main shaft, each balance block and the motor rotor assembly) is closer to the upper end, so that generally speaking, the upper middle part of the main shaft is a stress concentration area, and the vibration generated by the force can be transmitted out through the main shaft, the upper bearing, the upper bracket and the shell, so that the vibration problem of the compressor is caused. Therefore, the gravity center adjusting block is designed, and the gravity center of the shafting is moved downwards, which is beneficial.

Preferably, the gravity center adjusting mechanism 7 includes a housing 7-1, a slider 7-2, an elastic member 7-3 (preferably a spring), and a bottom plate 7-4, the sliding block 7-2 is arranged inside the shell 7-1, the sliding block 7-2 is connected with the elastic component 7-3, and is connected to the bottom plate 7-4 through the elastic component 7-3, the bottom plate 7-4 is fixedly arranged at one end of the shell 7-1, the shell 7-1 is sleeved on the main shaft 15 and can integrally rotate along with the rotation of the main shaft 15, the slide block 7-2 generates centrifugal deflection when rotating, but can be driven by the housing 7-1 to move in the direction of the resilient member 7-3 upon centrifugal deflection. This is a preferred structure form of the gravity center adjusting mechanism of the present invention, the slider can be elastically connected to the bottom plate by means of the slider, the bottom plate is fixed to the housing, the housing is sleeved on the main shaft to rotate integrally with the main shaft to effectively drive the slider to rotate together, one end of the slider is connected to the bottom plate through the elastic component, and the other end is a free end, so that the slider can deflect radially outwards due to the effect of centrifugal force during rotation, and is driven by the housing to move towards the elastic component during deflection, the larger the rotation speed, the larger the centrifugal force, the larger the deflection degree, the larger the acting force exerted by the housing, and the larger the displacement of the slider towards the elastic component, therefore, the gravity center of the whole mechanism can be effectively adjusted adaptively according to the magnitude of the rotation speed, for example, in case that the weight of an upper rotating component (such as a scroll plate and the like) is heavier, the larger the rotation speed is, the larger the centrifugal deflection of the upper part caused by the larger rotation speed is, and the larger the vibration is, so that the gravity center adjusting mechanism can be arranged at the lower part of the main shaft, and the direction from the sliding block to the elastic part is downwards arranged, therefore, the gravity center height can be effectively and adaptively lowered according to the rotation speed, and the noise can be adaptively lowered according to the running condition of the compressor.

As shown in fig. 2 and 3, the gravity center adjusting mechanism is composed of a housing, a slider, a spring and a bottom plate, and is installed at a corresponding position of the main shaft as an assembly. The materials of all components of the gravity center adjusting mechanism are not limited, the function of the compressor is not influenced, and meanwhile, the gravity center adjusting mechanism has the function of adjusting the gravity center and is preferably made of metal materials with high density and easiness in processing.

Preferably, the housing 7-1 is provided with a receiving space 70 capable of receiving the slider 7-2 therein, a side wall of the receiving space 70 located at a radially outer side is a first inclined slope 71 perpendicularly directed to the elastic member 7-3, a gap is formed between the first inclined slope 71 and the slider 7-2 when the spindle 15 is not rotated, and the slider 7-2 is driven by a centrifugal force to move toward the first inclined slope 71 and then contact the first inclined slope 71 to be pressed by the first inclined slope 71 when the spindle 15 is rotated. This is a further preferable configuration of the center of gravity adjusting mechanism of the present invention, in which the slider can be effectively accommodated in the accommodating space provided in the housing, the first inclined surface is provided so as to act on the slider deflected during rotation, and a pressure in the direction of the elastic member is applied to the slider, the pressure being automatically applied by the slider contacting the first inclined surface due to centrifugal deflection, and the larger the deflection, the larger the pressure applied, so that the center of gravity of the slider can be effectively adjusted according to the rotation speed, and further, vibration due to centrifugal force can be reduced.

Preferably, the side surface of the slider 7-2 opposite to the first inclined slope 71 is a second inclined slope 72 parallel to the first inclined slope 71 and with a perpendicular line facing the elastic member 7-3. The slider is preferably structured in a manner that the side surface of the slider opposite to the first inclined surface is a second inclined surface, and the second inclined surface is arranged in parallel with the first inclined surface, so that pressure perpendicular to the direction of the first inclined surface can be effectively applied to the slider through the contact of the first inclined surface and the second inclined surface when the slider deflects centrifugally, the two inclined surfaces can be in full contact, the pressure can be improved to the maximum extent, and the effect of adjusting the center of gravity can be enhanced.

Preferably, the number of the sliding blocks 7-2 is at least two, and the at least two sliding blocks 7-2 are arranged along the central line of the main shaft 15 in a central symmetry manner, the number of the elastic members 7-3 is also more than two and is arranged in one-to-one correspondence with the sliding blocks 7-2, and the number of the accommodating spaces 70 is also more than two and is arranged in one-to-one correspondence with the sliding blocks 7-2. More than two sliding blocks are arranged in a central symmetry mode along the central line, the component force of the pressure applied to the sliding blocks by the first inclined slope in the radial direction can be effectively counteracted, and only the component force in the axial direction is reserved, so that the gravity center adjusting mechanism can keep stress balance in the radial direction.

The invention provides a general structure capable of improving the center of gravity of a compressor shafting, wherein a center-of-gravity adjusting mechanism is of a centrosymmetric structure, and can change the axial center of gravity of the shafting without generating an eccentric action; along with the change of the running frequency of the compressor, the structure can change the center of gravity of a shafting; the gravity center adjusting mechanism is arranged on the shafting assembly and integrally operates along with the shafting. Preferably, the bearing is arranged below the motor rotor, and beneficial effects can be generated above or below the auxiliary bearing; the gravity center adjusting mechanism consists of a shell, a sliding block, a spring and a bottom plate; wherein, the sliding blocks are arranged in a central symmetry way; the single sliding block slides under the action of centrifugal force, so that the effect of shafting gravity center self-adaption is generated; the center is symmetrically arranged, so that the resultant force of centrifugal force of the gravity center adjusting mechanism in the radial direction is zero, and no eccentric action is generated. The stress of the slide block in the axial direction is balanced by the spring, so the stroke of the slide block is related to the rotating speed of the compressor, the elastic force of the spring and the like, and the slide block can be sequentially designed and selected according to the following relations:

Δh＝(F sin 2θ)/2k

the angle of the inclined wall of the sliding block is the same as that of the inclined wall of the shell, and the angle cannot be a right angle; the two are arranged correspondingly, and a small gap exists between the inclined walls of the two when the two are not operated.

As shown in fig. 2 and 3, the gravity center adjusting mechanism is composed of a housing, a slider, a spring and a bottom plate, and is installed at a corresponding position of the main shaft as an assembly. The materials of all components of the gravity center adjusting mechanism are not limited, the function of the compressor is not influenced, and meanwhile, the gravity center adjusting mechanism has the function of adjusting the gravity center and is preferably made of metal materials with high density and easiness in processing.

The bottom surface of the supporting leg 10 of the compressor is used as a reference, the mass of the shafting assembly except the self-adaptive block is set to be m1, the mass center and the reference distance are H1, the total mass of the shell, the spring and the bottom plate in the gravity center adjusting mechanism assembly is m2, the mass center and the reference distance are H2, the mass of the sliding block in the gravity center adjusting mechanism assembly is m3, the mass center and the reference distance are H3, then, when the gravity center adjusting mechanism is installed and the compressor does not operate, the shafting mass center and the reference distance H2 are changed into:

in connection with FIG. 16, it is apparent that

H₂<h₁

As shown in FIGS. 6 and 7, when the compressor is operated, the single slider 7-2 generates a centrifugal force F due to its eccentric arrangement, and

F＝m₃·r·ω²

f is the centrifugal force caused by the eccentricity of the slide block, N;

r is the radial distance between the sliding block and the theoretical geometric center of the shaft system, m;

omega-shafting running speed, m/s;

when the slider moves outward due to centrifugal force and contacts the sloped wall inside the housing 7-1, moving downward (toward the legs and downward as viewed in fig. 1) along the sloped wall, the centrifugal force F can be resolved into Fx and Fy, wherein the component force that moves the slider downward is the component force Fyy of Fy in the vertical downward direction:

F_y＝F cosθ

theta is the angle between the inclined wall of the housing 7-1 and the horizontal direction, and the smaller value is taken.

The slider moves down to compress the spring, and the slider receives vertical ascending elasticity Ft:

F_t＝k·Δh

k is the spring constant of the spring;

Δ h — the stroke by which the spring is lowered by the compressor, i.e., the stroke by which the slider is lowered.

When Fyy is balanced with Ft, the slider will not move downward, and at this time:

the compressor running shafting centroid to reference distance H3 becomes:

it is obvious that

H₃<H₂<h₁

The spring with corresponding elastic coefficient can be selected according to different requirements, and the angle of the inclined wall in the shell 7-1 can be designed. From the above derivation, when the slider mass m, the rotation speed ω, and the eccentric radius r are unchanged, Fyy is the largest when θ is 45 °.

From the overall view of the gravity center adjusting mechanism 7, as the sliding blocks are symmetrically arranged, the centrifugal forces generated by the sliding blocks are equal in magnitude and opposite in direction, so that the forces acting on the shell 7-1 are mutually offset, and the gravity center adjusting mechanism does not generate a centrifugal effect as a whole.

In practical application, the gravity center adjusting mechanism 7 is assembled and then is arranged on the main shaft in an interference manner. Wherein, the shell and the bottom plate can be welded, riveted and the like; the spring, the bottom plate and the sliding block can be connected in a proper mode; the inclined wall on the sliding block and the inclined wall of the shell are arranged at the same angle and correspondingly, and a small gap exists between the inclined wall and the inclined wall when the sliding block and the inclined wall of the shell are not operated.

The above is one embodiment of the present invention.

Preferably, the compressor is a vertical compressor, and comprises a pump body part and a motor structure 5, the gravity center adjusting mechanism 7 is arranged below the motor structure 5, and the perpendicular line of the first inclined plane 71 points downwards to the central line of the main shaft 15 so as to apply downward pressure on the sliding block 7-2. The vertical compressor is provided with the gravity center adjusting mechanism below the motor structure, and the vertical line of the first inclined plane points downwards to the gravity center line of the main shaft, so that downward pressure can be effectively applied to the sliding block in the rotation process of the main shaft, the gravity center of the sliding block can be effectively reduced in the rotation process, the gravity center of the shafting structure can be effectively reduced, and vibration can be dynamically reduced.

Preferably, the vertical compressor further includes a lower bracket 9, the lower bracket 9 is also sleeved on the main shaft 15, the lower bracket 9 is located below the motor structure 5, and the center of gravity adjusting mechanism 7 is disposed between the motor structure 5 and the lower bracket 9 or below the lower bracket 9. The main shaft can be effectively fixed and supported on the shell of the compressor through the lower support, and the gravity center adjusting mechanism is arranged between the motor structure and the lower support or arranged below the lower support, so that the gravity center of the shaft system can be effectively reduced, and the vibration of the shaft system of the compressor can be dynamically reduced in the rotating process.

Preferably, the compressor is a vertical compressor, and comprises a pump body part and a motor structure 5, the gravity center adjusting mechanism 7 is arranged above the motor structure 5, and the perpendicular line of the first inclined plane 71 points upwards to the central line of the main shaft 15 so as to apply upward pressure on the sliding block 7-2. The vertical compressor is another preferable structure form of the compressor, the gravity center adjusting mechanism is arranged below the motor structure, the vertical line of the first inclined plane points upwards to the gravity center line of the main shaft, upward pressure can be effectively applied to the sliding block in the rotation process of the main shaft, so that the gravity center of the sliding block can be effectively raised in the rotation process, the gravity center of the shafting structure can be effectively raised under certain special conditions, and vibration can be dynamically reduced.

Preferably, the compressor is a horizontal compressor, and includes a pump body portion and a motor structure, the center of gravity adjusting mechanism 7 is disposed on one side of the motor structure 5 along the axial direction, and the perpendicular line of the first inclined plane 71 is directed to the center line of the main shaft 15 leftward or rightward so as to apply a leftward or rightward pressure to the slider 7-2. The horizontal compressor is provided with the gravity center adjusting mechanism on the left side or the right side of the motor structure, the vertical line of the first inclined plane points to the gravity center line of the main shaft leftwards or rightwards, so that the left or right pressure can be effectively applied to the sliding block in the rotation process of the main shaft, the gravity center of the sliding block can be effectively changed leftwards or rightwards in the rotation process, the gravity center of the shafting structure can be effectively moved transversely in some special cases, and the vibration can be dynamically reduced.