A compressor

Abstract

The present invention provides a compressor, which comprises: a main shaft (15), on which a center of gravity adjustment mechanism (7) is arranged, and the center of gravity adjustment mechanism (7) can rotate with the main shaft (15), and when the center of gravity adjustment mechanism (7) rotates, its center of gravity can move along the axial direction of the main shaft. According to the present invention, the center of gravity can be automatically adjusted with the rotation of the main shaft, and an adaptive dynamic adjustment effect can be generated with the change of the operating frequency of the compressor, effectively reducing the vibration of the compressor during operation, and adaptively reducing the center of gravity of the compressor shaft system, so that the compressor can operate more smoothly at high frequencies, with less vibration and low noise; the present invention reduces the center of gravity of the compressor shaft system, indirectly reduces the force on the upper part of the compressor, thereby reducing the vibration of the suction and exhaust pipes, solving the problem of large vibration of the shaft system when the compressor is running; and solving the problem that the vibration of the compressor is greatly increased with the increase of frequency when the compressor is running.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor. Background Art

[0002] Scroll compressors are widely used in refrigeration, air conditioning, heat pumps and other fields due to their high efficiency, small size, light weight and stable operation. Generally speaking, a scroll compressor consists of a closed housing, a static scroll, a movable scroll, a bracket, a main shaft, an anti-rotation mechanism oil supply device and a motor. The profiles of the dynamic and static scrolls are both spiral. The movable scroll is eccentric to the static scroll and installed 180° apart, so multiple crescent-shaped spaces are formed between the dynamic and static scrolls. When the movable scroll rotates with the center of the static scroll as the center and rotates at a certain rotation radius without self-rotation, the outer crescent-shaped space will continue to move toward the center. At this time, the refrigerant is gradually pushed to the center space, and its volume continues to shrink while the pressure continues to increase until it is connected to the central exhaust hole. The high-pressure refrigerant is discharged from the pump body to complete the compression process.

[0003] When the scroll compressor is running, the centrifugal inertia force generated by the unbalanced mass such as the moving scroll disk will cause the entire machine to vibrate, generate noise, increase energy consumption, accelerate bearing wear, reduce the life of the machine, and even cause major accidents in severe cases. Strict balancing of the scroll compressor moving disk is one of the most important measures to reduce the vibration and noise of the scroll compressor, improve the safety, reliability, life and efficiency of the scroll compressor, and is also the guarantee for achieving low vibration and low noise performance. The balance of the scroll compressor moving disk occupies an important position in the manufacture of scroll compressors.

[0004] The movable scroll is eccentrically arranged on the crank pin relative to the main shaft. Therefore, the rotational inertia force of the movable scroll generated during the rotation of the main shaft will be transmitted to the main shaft, increasing the load on the main bearing and causing machine vibration. Therefore, under structural limitations, the main and auxiliary balancing blocks are used to jointly balance the rotational inertia force and its torque.

[0005] The main shaft, balance block and motor rotor form the shaft system assembly. After the assembly is designed and produced, the structural characteristics are determined. However, due to changes in operating conditions such as working conditions and speed, it is sometimes necessary to change the center of gravity of the shaft system to ensure more stable operation of the compressor and reduce the vibration and noise generated by the operation of the compressor.

[0006] Patent number CN208734552U discloses a balancing block for a compressor with an adjustable center of gravity. The balancing block is provided with counterweights in two directions, and the position of the counterweights can be adjusted according to design requirements, thereby adjusting the center of gravity of the balancing block. However, this structure is a static adjustment structure, and the center of gravity cannot be changed again after being installed inside the compressor, and the adaptive dynamic adjustment effect with the change of the compressor operating frequency cannot be achieved;

[0007] Patent number CN207673542U discloses a balancing assembly, a rotor assembly and a compressor. The balancing block is composed of a plurality of small counterweight blocks and is designed as a spliced ​​mortise and tenon structure. Different mortise and tenon schemes can be used according to design requirements to obtain balancing blocks with different centers of gravity. This structure is also a static adjustment structure, and the center of gravity cannot be changed again after installation;

[0008] Patent number CN208703429U discloses a vibration-damping base and a rotating mechanical device. The structure includes a base, an adjustment component and a support foot. The compressor is fixed on the support foot. The adjustment component introduces airflow to change the center of gravity of the compressor during operation to ensure that the center of gravity of the compressor does not deviate, thereby reducing vibration. Considering the overall compressor, this structure has disadvantages such as high control difficulty and many parts, which will weaken the effect of adjusting the center of gravity to a certain extent.

[0009] In the existing technical solutions, there are few cases that focus on the vibration of the shaft system components. The vibration noise of the scroll compressor mainly comes from electromagnetic noise and aerodynamic noise. The shaft system vibration is one of the main causes of electromagnetic noise. Therefore, studying the vibration of the compressor shaft system is of great significance for the noise and vibration reduction of the compressor. From a macroscopic perspective, lowering the center of gravity of the shaft system components is very helpful in reducing vibration noise. And there are even fewer solutions that can change the center of gravity of the shaft system as the compressor runs.

[0010] Since the compressor in the prior art has the problem of large shaft vibration during operation, the vibration of the compressor increases greatly with the increase of frequency during operation, and the existing compressor balance block and other structures cannot achieve an adaptive dynamic adjustment effect as the compressor operating frequency changes, resulting in technical problems such as large vibration during operation of the compressor. Therefore, the present invention studies and designs a compressor. Summary of the invention

[0011] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that structures such as the compressor balance block cannot achieve an adaptive dynamic adjustment effect as the operating frequency of the compressor changes, resulting in the compressor still having large vibrations during operation, thereby providing a compressor.

[0012] In order to solve the above problems, the present invention provides a compressor, comprising:

[0013] A main shaft is provided with a center of gravity adjustment mechanism, which can rotate with the main shaft, and when the center of gravity adjustment mechanism rotates, its center of gravity can move along the axial direction of the main shaft.

[0014] Preferably, the center of gravity adjustment mechanism includes a shell, a slider, an elastic component and a base plate, the slider is arranged inside the shell, and the slider is connected to the elastic component and connected to the base plate through the elastic component, the base plate is fixedly arranged at one end of the shell, and the shell is sleeved on the main shaft and can rotate integrally with the rotation of the main shaft, the slider generates centrifugal deflection when rotating, and can be driven by the shell to move in the direction of the elastic component when centrifugal deflection occurs.

[0015] Preferably, a accommodating space capable of accommodating the slider is provided inside the shell, and the side wall of the accommodating space located on the radial outside is a first inclined surface with a vertical line pointing to the elastic component, and when the main shaft is not rotating, there is a gap between the first inclined surface and the slider, and when the main shaft rotates, the slider is driven by centrifugal force to move toward the first inclined surface and then contacts the first inclined surface, and pressure is applied to it by the first inclined surface.

[0016] Preferably, the side surface of the sliding block opposite to the first inclined surface is a second inclined surface which is parallel to the first inclined surface and whose perpendicular line faces the elastic component.

[0017] Preferably, there are at least two sliders, and at least two sliders are arranged symmetrically along the center line of the main shaft, there are more than two elastic components, and they are arranged one-to-one with the sliders, and there are more than two accommodating spaces, and they are arranged one-to-one with the sliders.

[0018] Preferably, the compressor is a vertical compressor, including a pump body and a motor structure, the center of gravity adjustment mechanism is arranged below the motor structure, and the vertical line of the first inclined surface points downward to the center line of the main shaft so as to apply downward pressure to the slider.

[0019] Preferably, the vertical compressor further comprises a lower bracket, which is also sleeved on the main shaft and located below the motor structure, and the center of gravity adjustment mechanism is arranged between the motor structure and the lower bracket, or arranged below the lower bracket.

[0020] Preferably, the compressor is a vertical compressor, including a pump body and a motor structure, the center of gravity adjustment mechanism is arranged above the motor structure, and the vertical line of the first inclined surface points upward to the center line of the main shaft so as to apply upward pressure to the slider.

[0021] Preferably, the compressor is a horizontal compressor, including a pump body part and a motor structure, the center of gravity adjustment mechanism is arranged on one side of the motor structure along the axial direction, and the vertical line of the first inclined surface points to the left or right to the center line of the main shaft so as to apply left or right pressure to the slider.

[0022] Preferably, the pump body part is a scroll compression assembly, and the compressor is a scroll compressor; and / or, an upper balancing block is also provided at the position of the pump body part, and / or a middle balancing block is also provided between the pump body part and the motor structure and is sleeved on the main shaft.

[0023] A compressor provided by the present invention has the following beneficial effects:

[0024] 1. The present invention sets a gravity center adjustment mechanism on the main shaft of the compressor, which can automatically adjust the gravity center as the main shaft rotates, and can produce an adaptive dynamic adjustment effect as the operating frequency of the compressor changes, effectively reducing the vibration of the compressor during operation, and adaptively reducing the gravity center of the compressor shaft system, so that the compressor can run more smoothly at high frequencies, with less vibration and low noise; the present invention reduces the gravity center of the compressor shaft system, indirectly reduces the force on the upper part of the compressor, thereby reducing the vibration of the suction and exhaust pipes, solving the problem of large vibration of the shaft system when the compressor is running; and solving the problem that the vibration of the compressor greatly increases with the increase of frequency when the compressor is running;

[0025] 2. The present invention proposes a universal structure that can improve the center of gravity of the compressor shaft system, wherein the center of gravity adjustment mechanism is a centrally symmetrical structure, which can change the axial center of gravity of the shaft system without generating an eccentric effect; as the operating frequency of the compressor changes, the structure can change the center of gravity of the shaft system; the center of gravity adjustment mechanism is arranged on the shaft system assembly, and the entire mechanism runs with the shaft system. Preferably, it is arranged below the motor rotor, and can produce beneficial effects above or below the secondary bearing; the center of gravity adjustment mechanism is composed of a housing, a slider, a spring and a bottom plate; wherein the slider is centrally symmetrically arranged; a single slider slides due to the centrifugal force, thereby generating an adaptive effect of the center of gravity of the shaft system; the centrally symmetrical arrangement makes the resultant centrifugal force of the center of gravity adjustment mechanism in the radial direction zero, and does not generate an eccentric effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a structural diagram of the compressor of the present invention - a cross-sectional view;

[0027] Figure 2 It is an assembly structure diagram of the center of gravity adjustment mechanism (gravity adaptive block) and the main shaft of the compressor of the present invention;

[0028] Figure 3 It is an exploded structural diagram of the center of gravity adjustment mechanism (gravity adaptive block) of the compressor of the present invention;

[0029] Figure 4 It is a main cross-sectional view of the center of gravity adjustment mechanism (gravity adaptive block) of the compressor of the present invention;

[0030] Figure 5 It is a top sectional view of the center of gravity adjustment mechanism (gravity adaptive block) of the compressor of the present invention;

[0031] Figure 6 It is a force diagram of the center of gravity adjustment mechanism (gravity adaptive block) of the compressor of the present invention;

[0032] Figure 7 It is a force decomposition diagram of a slider of a center of gravity adjustment mechanism (gravity self-adaptive block) of a compressor of the present invention;

[0033] Figure 8 It is a schematic diagram of the spring force of the center of gravity adjustment mechanism (gravity adaptive block) of the compressor of the present invention;

[0034] Fig. 9 This is a structural diagram of the compressor of Example 2 of the present invention - a cross-sectional view (two balancing blocks);

[0035] Fig.10 : Embodiment 3 of the present invention - a schematic diagram of the structure of a four-slider center of gravity adjustment mechanism;

[0036] Fig.11 : Embodiment 4 of the present invention - a structural diagram and force diagram of a three-slider center of gravity adjustment mechanism;

[0037] Fig.12 : Embodiment 5 of the present invention - a schematic diagram of the structure of a six-slider center of gravity adjustment mechanism;

[0038] Fig.13 : Embodiment 6 of the present invention - another arrangement of the center of gravity adjustment mechanism;

[0039] Fig.14 : Embodiment 7 of the present invention - another arrangement of the center of gravity adjustment mechanism to move the center of gravity upward;

[0040] Fig.15 : Embodiment 8 of the present invention - another structure of the center of gravity adjustment mechanism, which moves the center of gravity upward;

[0041] Fig.16 : Schematic diagram of the center of gravity moment structure of the present invention.

[0042] The reference numerals are:

[0043] 1. Compressor; 2. Upper bracket; 3. Upper balance block; 4. Upper bearing; 5. Motor structure; 6. Lower balance block; 7. Center of gravity adjustment mechanism; 7-1. Housing; 7-2. Slider; 7-3. Elastic component; 7-4. Bottom plate; 70. Accommodating space; 71. First inclined surface; 72. Second inclined surface; 8. Lower bearing; 9. Lower bracket; 10. Support foot; 11. Vibration-damping washer; 12. Oil suction assembly; 13. Housing; 14. Middle balance block; 15. Spindle. DETAILED DESCRIPTION

[0044] like Figure 1-16 As shown, the present invention provides a compressor, which includes:

[0045] The main shaft 15 is provided with a gravity center adjustment mechanism 7 (also called gravity center adaptive block). The gravity center adjustment mechanism 7 can rotate along with the main shaft 15, and when the gravity center adjustment mechanism 7 rotates, its gravity center can move along the axial direction of the main shaft.

[0046] The present invention sets a gravity center adjustment mechanism on the main shaft of the compressor, which can automatically adjust the gravity center as the main shaft rotates, and can produce an adaptive dynamic adjustment effect as the operating frequency of the compressor changes, effectively reducing the vibration of the compressor during operation (especially reducing electromagnetic noise), and adaptively reducing the gravity center of the compressor shaft system, so that the compressor can operate more smoothly at high frequencies, with low vibration and low noise; the present invention reduces the gravity center of the compressor shaft system, indirectly reduces the force on the upper part of the compressor, thereby reducing the vibration of the suction and exhaust pipes, solving the problem of large vibration of the shaft system when the compressor is running; and solving the problem that the vibration of the compressor greatly increases with the increase of frequency when the compressor is running. The present invention enables the center of gravity of the shaft system to change adaptively during the operation of the compressor, ensuring that the compressor operates more stably under high speed and other working conditions.

[0047] Figure 1 An embodiment of the present invention is shown. The main shaft 15 and the motor structure 5 of the vertical scroll compressor 1 are fixed in the fuselage by the upper bracket 2 and the lower bracket 9. The upper bearing 4 and the lower bearing 8 play the role of bearing the shaft. The upper bracket and the lower bracket are fixed on the shell 13 by welding or interference fit. When the compressor is running, the motor drives the main shaft to rotate, and the main shaft drives the scroll compressor pump body (not shown) to operate to achieve the compression function. However, due to the eccentric arrangement of the movable scroll in the scroll compressor, centrifugal force will be generated during operation. In order to balance the centrifugal force and the centrifugal torque applied to the main shaft, a balancing structure needs to be designed, in a multi-balance block compressor, that is, an upper balance block 3, a middle balance block 14, and a lower balance block 6. The center of gravity adjustment mechanism 7 is installed between the motor structure 5 and the lower bracket 9, and is interference-connected to the main shaft 15.

[0048] In the conventional vertical scroll compressor structure, in order to better balance the centrifugal force of the movable scroll, the balance block is placed closer to the scroll, and the center of gravity of the entire shaft system assembly (main shaft + each balance block + motor rotor assembly) is closer to the upper end. Therefore, generally speaking, the middle part of the main shaft is the force concentration area, and the vibration generated by the force will be transmitted through the main shaft-upper bearing-upper bracket-housing, causing compressor vibration problems. Therefore, it is beneficial to design a center of gravity adjustment block to move the center of gravity of the shaft system downward.

[0049] Preferably, the center of gravity adjustment mechanism 7 includes a shell 7-1, a slider 7-2, an elastic component 7-3 (preferably a spring) and a base plate 7-4, the slider 7-2 is arranged inside the shell 7-1, and the slider 7-2 is connected to the elastic component 7-3, and is connected to the base plate 7-4 through the elastic component 7-3, the base plate 7-4 is fixedly arranged at one end of the shell 7-1, and the shell 7-1 is sleeved on the main shaft 15 and can rotate integrally with the rotation of the main shaft 15, the slider 7-2 generates centrifugal deflection when rotating, and can be driven by the shell 7-1 to move in the direction of the elastic component 7-3 during centrifugal deflection. This is the preferred structural form of the center of gravity adjustment mechanism of the present invention. The slider can be elastically connected to the bottom plate by means of a slider, elasticity and a bottom plate, and the bottom plate is fixed to the shell. The shell is sleeved on the main shaft to rotate with the main shaft as a whole, so as to effectively drive the slider to rotate together. One end of the slider is connected to the bottom plate by an elastic component and the other end is a free end. Therefore, the slider will deflect radially outward due to the action of centrifugal force during rotation, and will be driven by the shell to move in the direction of the elastic component during deflection. The greater the speed, the greater the centrifugal force and the greater the degree of deflection. The greater the force applied by the shell, the greater the displacement of the slider in the direction of the elastic component. Therefore, the center of gravity of the entire mechanism can be effectively and adaptively adjusted according to the speed. For example, when the weight of the upper rotating component (such as a vortex disk, etc.) is heavy, the greater its speed, the greater the upper centrifugal deflection it brings, causing great vibration. Therefore, the center of gravity adjustment mechanism can be arranged at the lower position of the main shaft, and the direction of the slider to the elastic component is installed downward, so that the height of the center of gravity can be effectively and adaptively lowered according to the speed, and the noise can be adaptively reduced according to the operation of the compressor.

[0050] like Figure 2 , 3 As shown, the gravity center adjustment mechanism is composed of a housing, a slider, a spring, and a bottom plate, and is installed as a component at the corresponding position of the main shaft. There is no restriction on the material of each component of the gravity center adjustment mechanism, as long as it does not affect the function of the compressor. At the same time, it has the function of adjusting the gravity center, and it is best to use a metal material with a high density and easy processing.

[0051] Preferably, the housing 7-1 is provided with a receiving space 70 capable of receiving the slider 7-2, and the side wall of the receiving space 70 located on the radially outer side is a first inclined surface 71 whose vertical line points to the elastic component 7-3. When the spindle 15 does not rotate, there is a gap between the first inclined surface 71 and the slider 7-2. When the spindle 15 rotates, the slider 7-2 is driven by the centrifugal force to move toward the first inclined surface 71 and then contact the first inclined surface 71, and is pressed by the first inclined surface 71. This is a further preferred structural form of the center of gravity adjustment mechanism of the present invention. The receiving space provided inside the housing can effectively receive the slider therein. The provision of the first inclined surface can act on the slider deflected during rotation, and apply pressure to the slider in the direction of the elastic component. This pressure is automatically applied due to the contact of the first inclined surface by the centrifugal deflection of the slider. The greater the deflection, the greater the pressure applied. Therefore, the center of gravity of the slider can be effectively adjusted according to the rotation speed, thereby reducing the vibration caused by the centrifugal force.

[0052] Preferably, the side of the slider 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 whose vertical line faces the elastic component 7-3. This is the preferred structural form of the slider of the present invention, that is, the side of the slider opposite to the first inclined surface is the second inclined surface, and the second inclined surface is arranged in parallel with the first inclined surface, so that when the slider is centrifugally deflected, pressure perpendicular to the direction of the first inclined surface can be effectively applied to the slider through the contact between the first inclined surface and the second inclined surface, and the two inclined surfaces can be in full contact, which can maximize the pressure and enhance the effect of center of gravity adjustment.

[0053] Preferably, there are at least two sliders 7-2, and at least two sliders 7-2 are arranged symmetrically along the center line of the main shaft 15, there are also more than two elastic components 7-3, and they are arranged one-to-one with the sliders 7-2, and there are also more than two accommodating spaces 70, and they are arranged one-to-one with the sliders 7-2. The two or more sliders are arranged symmetrically along the center line, which can effectively offset the radial force component of the pressure applied to the slider by the first inclined surface, and only retain the axial force component, so that the center of gravity adjustment mechanism can maintain force balance in the radial direction.

[0054] The present invention proposes a universal structure that can improve the center of gravity of the compressor shaft system, wherein the center of gravity adjustment mechanism is a centrally symmetrical structure, which can change the axial center of gravity of the shaft system without generating an eccentric effect; as the operating frequency of the compressor changes, the structure can change the center of gravity of the shaft system; the center of gravity adjustment mechanism is arranged on the shaft system assembly, and the entirety runs with the shaft system. Preferably, it is arranged below the motor rotor, and can produce beneficial effects above or below the secondary bearing; the center of gravity adjustment mechanism consists of a housing, a slider, a spring and a base plate; wherein the slider is centrally symmetrically arranged; a single slider slides due to centrifugal force, thereby generating an adaptive effect of the center of gravity of the shaft system; the centrally symmetrical arrangement makes the resultant centrifugal force of the center of gravity adjustment mechanism in the radial direction zero, and does not generate an eccentric effect. The force on the slider in the axial direction is balanced by the spring, so the stroke of the slider is related to the compressor speed, spring elasticity, etc., and the relationship is as follows, which can be designed and selected in sequence:

[0055] Δh=(F sin 2θ) / 2k

[0056] The angle of the inclined wall of the slider is the same as the angle of the inclined wall of the housing, 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 not in operation.

[0057] like Figure 2 , 3 As shown, the gravity center adjustment mechanism is composed of a housing, a slider, a spring, and a bottom plate, and is installed as a component at the corresponding position of the main shaft. There is no restriction on the material of each component of the gravity center adjustment mechanism, as long as it does not affect the function of the compressor. At the same time, it has the function of adjusting the gravity center, and it is best to use a metal material with a high density and easy processing.

[0058] Taking the bottom surface of the compressor support foot 10 as the reference, assuming that the mass of the shaft system assembly excluding the adaptive block is m1, the distance between the center of mass and the reference is h1, the total mass of the housing, spring and bottom plate in the center of gravity adjustment mechanism assembly is m2, the distance between the center of mass and the reference is h2, the mass of the slider in the center of gravity adjustment mechanism assembly is m3, and the distance between the center of mass and the reference is h3, then, when the center of gravity adjustment mechanism is installed and the compressor is not running, the distance between the center of mass of the shaft system and the reference H2 becomes:

[0059]

[0060] Combination Fig.16 , obviously

[0061] H2

[0062] like Figure 6 , 7 As shown, when the compressor is running, the single slider 7-2 generates a centrifugal force F due to the eccentric setting, and

[0063] F=m3·r·ω 2 ​

[0064] F——Centrifugal force caused by eccentricity of the slider, N;

[0065] r——The radial distance between the slider and the theoretical geometric center of the shaft system, m;

[0066] ω——shaft system running speed, m / s;

[0067] When the slider moves outward due to the centrifugal force and contacts the inclined wall inside the housing 7-1, it moves downward along the inclined wall ( Figure 1 As shown, the centrifugal force F can be decomposed into Fx and Fy, where the force component that makes the slider move downward is the vertical component Fyy of Fy downward:

[0068] F y =F cosθ

[0069]

[0070] θ——The angle between the inclined wall of the shell 7-1 and the horizontal direction, take the smaller value.

[0071] The downward movement of the slider compresses the spring, and the slider is subjected to a vertical upward elastic force Ft:

[0072] F t = k·Δh

[0073] k——elastic coefficient of spring;

[0074] Δh – the stroke of the spring compressed by the compressor, that is, the stroke of the slider descending.

[0075] When Fyy is balanced with Ft, the slider will not move downward. At this time:

[0076]

[0077] When the compressor is running, the distance H3 between the center of mass of the shaft system and the reference becomes:

[0078]

[0079] Apparently

[0080] H3 <H2

[0081] The spring with the corresponding elastic coefficient can be selected according to different requirements, and the angle of the inclined wall in the housing 7-1 can be designed. According to the above derivation, when the slider mass m, the rotation speed ω, and the eccentric radius r remain unchanged, θ=45°, then Fyy is the maximum.

[0082] ​From the perspective of the center of gravity adjustment mechanism 7 as a whole, since the sliders are arranged symmetrically, the centrifugal forces generated by the two are equal in magnitude and opposite in direction, so that the forces acting on the housing 7-1 cancel each other out, and the center of gravity adjustment mechanism as a whole does not generate centrifugal action.

[0083] In practical applications, after the center of gravity adjustment mechanism 7 is assembled, it is interference-mounted on the main shaft. The shell and the bottom plate can be welded, riveted, etc.; the spring and the bottom plate and the slider can also be connected in an appropriate manner; the inclined wall on the slider and the inclined wall of the shell are at the same angle and arranged correspondingly, and there is a small gap between the two when not in operation.

[0084] The above is one embodiment of the present invention.

[0085] Preferably, the compressor is a vertical compressor, including a pump body and a motor structure 5, the center of gravity adjustment mechanism 7 is arranged below the motor structure 5, and the vertical line of the first inclined surface 71 points downward to the center line of the main shaft 15, so as to apply downward pressure to the slider 7-2. This is the preferred structural form of the compressor of the present invention. The vertical compressor also arranges the center of gravity adjustment mechanism below the motor structure, and the vertical line of the first inclined surface points downward to the center of gravity line of the main shaft, which can effectively apply downward pressure to the slider during the rotation of the main shaft, so as to effectively lower the center of gravity of the slider during the rotation, thereby effectively lowering the center of gravity of the shaft system structure and dynamically reducing vibration.

[0086] Preferably, the vertical compressor further comprises a lower bracket 9, which is also sleeved on the main shaft 15, and the lower bracket 9 is located below the motor structure 5, and the center of gravity adjustment mechanism 7 is arranged between the motor structure 5 and the lower bracket 9, or arranged below the lower bracket 9. This is a further preferred structural form of the vertical compressor of the present invention, and the main shaft can be effectively fixed and supported on the housing of the compressor through the lower bracket, and the center of gravity adjustment mechanism is arranged between the motor structure and the lower bracket or arranged below the lower bracket, which can effectively reduce the center of gravity of the shaft system, thereby dynamically reducing the vibration of the compressor shaft system during rotation.

[0087] Preferably, the compressor is a vertical compressor, including a pump body and a motor structure 5, the center of gravity adjustment mechanism 7 is arranged above the motor structure 5, and the vertical line of the first inclined surface 71 points upward to the center line of the main shaft 15, so as to apply upward pressure to the slider 7-2. This is another preferred structural form of the compressor of the present invention, the vertical compressor also arranges the center of gravity adjustment mechanism below the motor structure, the vertical line of the first inclined surface points upward to the center of gravity line of the main shaft, and can effectively apply upward pressure to the slider during the rotation of the main shaft, so as to effectively raise the center of gravity of the slider during the rotation, thereby effectively raising the center of gravity of the shaft structure in some special cases, and dynamically reducing vibration.

[0088] Preferably, the compressor is a horizontal compressor, including a pump body and a motor structure, the center of gravity adjustment mechanism 7 is arranged on one side of the motor structure 5 along the axial direction, and the vertical line of the first inclined surface 71 points to the left or right at the center line of the main shaft 15, so as to apply pressure to the left or right on the slider 7-2. This is another preferred structural form of the compressor of the present invention, a horizontal compressor and the center of gravity adjustment mechanism is arranged on the left or right side of the motor structure, the vertical line of the first inclined surface points to the left or right at the center of gravity line of the main shaft, which can effectively apply pressure to the left or right on the slider during the rotation of the main shaft, so as to effectively change the center of gravity of the slider to the left or right during the rotation, thereby effectively moving the center of gravity of the shaft structure laterally in some special cases, and dynamically reducing vibration.

[0089] Embodiment 2:

[0090] like Fig. 9 As shown, in a conventional scroll compressor with two balancing blocks, a center of gravity adjustment mechanism can also be used, and its structure is similar to that of Example 1, and the calculation method is also the same, so no special explanation is given here.

[0091] Embodiment 3:

[0092] like Fig.10 The figure shows a schematic diagram of a four-slider center of gravity adjustment mechanism structure. According to Example 1, it can be known that this structure can also achieve the function of adjusting the center of gravity, and the center of gravity adjustment mechanism does not produce centrifugal effect.

[0093] Embodiment 4:

[0094] like Fig.11 The figure shows a schematic diagram of the structure and force diagram of a three-slider center of gravity adjustment mechanism. Simple calculations show that the center of gravity adjustment mechanism does not produce centrifugal action.

[0095] Embodiment 5:

[0096] like Fig.12 The figure shows a schematic diagram of the structure of a six-slider center of gravity adjustment mechanism.

[0097] Embodiment 6:

[0098] like Fig.13 As shown, another arrangement of the center of gravity adjustment mechanism is installed below the lower bracket.

[0099] Embodiment 7:

[0100] like Fig.14As shown in FIG. 1 , another arrangement of the center of gravity adjustment mechanism is installed above the motor, which will cause the center of gravity of the shaft system to move upward. When the center of gravity adjustment mechanism is installed below the center of gravity of the shaft system, the center of gravity of the shaft system will move downward; when the center of gravity adjustment mechanism is installed above the center of gravity of the shaft system, the center of gravity of the shaft system will move upward.

[0101] Embodiment 8:

[0102] like Fig.15 As shown, another structure of the center of gravity adjustment mechanism is shown. When the compressor is running, the slider will move upward, which is more effective when combined with Example 7.

[0103] Preferably, the pump body part is a scroll compression assembly, and the compressor is a scroll compressor; and / or,

[0104] An upper balancing block 3 is also provided at the position of the pump body portion, and / or a middle balancing block 14 is also provided between the pump body portion and the motor structure 5 and sleeved on the main shaft 15 .

[0105] This is a further effective structural form of the present invention, that is, the compressor is a scroll compressor, the pump body part is a scroll compression assembly, and the upper balancing block and the middle balancing block are both used to balance the mass of the eccentric shaft and the movable and stationary scrolls.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: A main shaft (15), wherein a center of gravity adjustment mechanism (7) is arranged on the main shaft (15), and the center of gravity adjustment mechanism (7) can rotate along with the main shaft (15), and when the center of gravity adjustment mechanism (7) rotates, its center of gravity can move along the axial direction of the main shaft; The center of gravity adjustment mechanism (7) comprises a housing (7-1), a slider (7-2), an elastic component (7-3) and a bottom plate (7-4); the slider (7-2) is arranged inside the housing (7-1), and the slider (7-2) is connected to the elastic component (7-3) and 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 housing (7-1); the housing (7-1) is sleeved on the main shaft (15) and can rotate integrally with the rotation of the main shaft (15); the slider (7-2) generates centrifugal deflection when rotating, and can be driven by the housing (7-1) to move in the direction of the elastic component (7-3) when centrifugal deflection occurs.

2. The compressor according to claim 1, characterized in that: The housing (7-1) is provided with a receiving space (70) capable of accommodating the slider (7-2), and a radially outer side wall of the receiving space (70) is a first inclined surface (71) whose vertical line points to the elastic component (7-3). When the main shaft (15) does not rotate, there is a gap between the first inclined surface (71) and the slider (7-2). When the main shaft (15) rotates, the slider (7-2) is driven by centrifugal force to move toward the first inclined surface (71) and then contacts the first inclined surface (71), and pressure is applied by the first inclined surface (71).

3. The compressor according to claim 2, characterized in that: 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 has a vertical line facing the elastic component (7-3).

4. The compressor according to claim 2, characterized in that: There are at least two sliders (7-2), and at least two sliders (7-2) are arranged in a central symmetric manner along the center line of the main shaft (15); there are also more than two elastic components (7-3), and they are arranged in a one-to-one correspondence with the sliders (7-2); there are also more than two accommodating spaces (70), and they are arranged in a one-to-one correspondence with the sliders (7-2).

5. The compressor according to any one of claims 2 to 4, characterized in that: The compressor is a vertical compressor, comprising a pump body and a motor structure (5); the center of gravity adjustment mechanism (7) is arranged below the motor structure (5), and a vertical line of the first inclined surface (71) points downward to the center line of the main shaft (15) so as to apply downward pressure to the slider (7-2).

6. The compressor according to claim 5, characterized in that: The vertical compressor further comprises a lower bracket (9), the lower bracket (9) also being sleeved on the main shaft (15), and the lower bracket (9) being located below the motor structure (5), and the center of gravity adjustment mechanism (7) being arranged between the motor structure (5) and the lower bracket (9), or being arranged below the lower bracket (9).

7. The compressor according to any one of claims 2 to 4, characterized in that: The compressor is a vertical compressor, comprising a pump body and a motor structure (5); the center of gravity adjustment mechanism (7) is arranged above the motor structure (5), and a vertical line of the first inclined surface (71) points upward to the center line of the main shaft (15) so as to apply upward pressure to the slider (7-2).

8. The compressor according to any one of claims 2 to 4, characterized in that: The compressor is a horizontal compressor, comprising a pump body and a motor structure (5); the center of gravity adjustment mechanism (7) is arranged on one side of the motor structure (5) along the axial direction, and a vertical line of the first inclined surface (71) points to the left or right toward the center line of the main shaft (15) so as to apply leftward or rightward pressure to the slider (7-2).

9. The compressor according to claim 6, characterized in that: The pump body part is a scroll compression assembly, and the compressor is a scroll compressor; and / or, An upper balancing block (3) is also provided at the position of the pump body portion, and / or a middle balancing block (14) is also provided between the pump body portion and the motor structure (5) and sleeved on the main shaft (15).

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