CN112901494B

CN112901494B - Pump body assembly, compressor and equipment with pump body assembly and compressor

Info

Publication number: CN112901494B
Application number: CN202110088036.XA
Authority: CN
Inventors: 徐嘉; 刘双来; 方琪; 律刚; 董聪聪
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-05-24
Anticipated expiration: 2041-01-22
Also published as: CN112901494A

Abstract

The application provides a pump body assembly, a compressor and equipment with the same, a crankshaft and an NOPD damping part; the crankshaft is provided with an eccentric part; the NOPD damping part comprises a damping cavity and damping particles; the damping cavity is arranged on the eccentric part; the damping particles are arranged in the damping cavity. According to the pump body assembly, the compressor and the equipment with the compressor, the vibration reduction effect on the movable disc is good, and the structure is simple.

Description

Pump body assembly, compressor and equipment with pump body assembly and compressor

Technical Field

This application belongs to electrical apparatus technical field, concretely relates to pump body subassembly, compressor and have its equipment.

Background

At present, for the scroll compressor, the pump body is the main reason for generating the vibration of the scroll compressor. The roller which is closely connected with the crankshaft but the dynamic disc on the pump body is directly subjected to vibration, and the pump body is the main reason for generating the vibration of the scroll compressor.

However, the moving disk is not a pure rotating part and cannot rotate when rotating eccentrically, so that the moving disk actually always has acceleration; the vibration damping mode has great difficulty.

Therefore, how to provide a pump body assembly, a compressor and equipment with the pump body assembly, which have good vibration damping effect on a movable disc and simple structures, becomes a problem which needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a pump body subassembly, compressor and have its equipment, and is effectual to the damping of driving disk, and simple structure.

In order to solve the above problem, the present application provides a pump body assembly including:

a crankshaft; the crankshaft is provided with an eccentric part;

and a NOPD damping section; the NOPD damping part comprises a damping cavity and damping particles; the damping cavity is arranged on the eccentric part; the damping particles are arranged in the damping cavity.

Preferably, the damping cavity is a symmetrical structure symmetrical about the central axis of the crankshaft;

preferably, the cross section of the damping cavity in the direction of the central axis of the crankshaft is circular;

preferably, the inner wall of the damping chamber is provided with a damping layer.

Preferably, the pump body assembly further comprises a compression portion; the compression part is arranged on the eccentric part; the damping cavity is provided with an opening; the compressing part is covered at the opening;

preferably, the outer surface of the eccentric portion comprises an eccentric zone and a proximal zone; the distance between the near center area and the central axis of the crankshaft is d 1; the eccentric zone is at a distance d2 from the central axis of the crankshaft; wherein d1< d 2;

preferably, the damping chamber is arranged inside the eccentric portion.

Preferably, the compression section comprises a cam plate; the movable disc is arranged at the first end of the eccentric part; the movable disc comprises a shaft sleeve; the shaft sleeve is sleeved outside the eccentric part.

Preferably, the opening is arranged at the first end of the movable disc;

preferably, the first and second electrodes are formed of a metal,

wherein R is the radius of the eccentric part, m is the mass of the movable disc, and R is the turning radius of the movable disc; beta is the radian extruded by the movable disc in the proximal area; m is the total mass of the damping particles; the r ball is the radius of gyration of the damping particles in the inner wall of the damping cavity.

Preferably, the opening opens in the proximal region.

Preferably, in the direction away from the movable disc, the proximal area is divided into a first area and a second area in sequence; the opening is arranged on the first area.

Preferably, in the direction away from the movable disc, the proximal area is divided into a first part, a second part and a third part in sequence; the opening is disposed on the second portion.

Preferably, the number of NOPD dampers is set to at least one; when the number of the NOPD damping parts is more than two, the more than two NOPD damping parts are sequentially arranged in the central axis direction of the crankshaft;

preferably, the eccentric part is provided with a connecting hole; the connecting hole is superposed with the central axis of the crankshaft; the compression part is provided with a connecting shaft; the connecting shaft is arranged in the connecting hole and connected with the eccentric part.

According to still another aspect of the application, a compressor is provided, which comprises a pump body assembly, and the pump body assembly is described above.

According to yet another aspect of the present application, there is provided an apparatus comprising a compressor, the compressor being as described above.

According to the pump body assembly, the compressor and the equipment with the compressor, the damping cavity is arranged on the eccentric part; the damping particles are arranged in the damping cavity, so that the damping effect on the movable disc is good, and the structure is simple.

Drawings

FIG. 1 is a schematic structural view of a pump body assembly according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a pump body assembly according to an embodiment of the present application;

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

FIG. 4 is a schematic structural view of a pump body assembly according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a pump body assembly according to an embodiment of the present application.

The reference numerals are represented as:

1. a crankshaft; 2. an eccentric portion; 21. a proximal cardiac region; 22. an eccentric region; 31. a damping chamber; 311. an opening; 32. damping particles; 4. a compression section.

Detailed Description

Referring collectively to fig. 1, according to an embodiment of the present application, a pump body assembly includes a crankshaft 1 and a NOPD damping portion; the crankshaft 1 is provided with an eccentric part 2; the NOPD damping part comprises a damping cavity 31 and damping particles 32; the damping chamber 31 is arranged on the eccentric part 2; the damping particles 32 are arranged in the damping cavity 31, have good damping effect on the movable disc and have simple structure. The damping cavity 31 is arranged on the eccentric part 2, so that on one hand, the rigidity of the eccentric shaft part of the crankshaft 1 relative to other parts is reduced, the eccentric shaft part is easier to generate elastic deformation due to the excitation transmitted to the crankshaft 1 by the movable disc, and the vibration is transmitted to the crankshaft 1; so that the total weight of the damping particles 32 on the eccentric 2 is sufficiently large in proportion to the total weight of the eccentric 2, which enables the vibration energy transmitted by the moving disk to the crankshaft 1 to be absorbed to a large extent by the particles. The problem that NOPD vibration reduction structure is difficult to directly absorb the vibration of movable disk can be effectively solved, the problem that the movable disk produces vibration because of pneumatics and influences compressor noise performance can also be solved. This application has realized the NOPD damping effect to the driving disk through less additional weight for the vibration of driving disk most just produces enough big decay when passing to on the bent axle 1, thereby reduces each item vibration index of bent axle 1 and whole organism, noise abatement.

Because the gas in the pump body of the scroll compressor changes periodically and the working condition is not constant, the force of the pump body on the shafting is accompanied by various vibrations, and the vibration is the main cause of the shafting. And the pump body force is transmitted to the crankshaft 1 through the movable disc, although the structure of the scroll compressor causes that the NOPD structure is difficult to arrange on one side of the crankshaft 1 close to the pump body, the movable disc does not have components of external acceleration input. Because the dynamic disk is eccentrically moved, if the damping chamber 31 is arranged on the dynamic disk, the damping chamber 31 is caused to rotate together with the dynamic disk, the inner damping particles 32 roll around the inner wall of the damping chamber 31 for one circle every time the dynamic disk rotates, and the rotating energy is still provided by the motor, so that a large amount of power is wasted. Obviously, compare in setting up NOPD damping part on the driving disk, this application sets up the damping part on eccentric part 2, and more energy saving, and the structure is simpler.

The application also discloses embodiments, the damping cavity 31 is a symmetrical structure which is symmetrical about the central axis of the crankshaft 1; the center of the damper chamber 31 coincides with the rotation center of the crankshaft 1. A plurality of damping particles 32 are distributed in the damping cavity 31 according to a NOPD structure. When the movable disc does non-autorotation eccentric rotation along the NOPD damping part, the NOPD damping part inside does pure rotation motion, and the pure rotation motion is different from the circular motion of the eccentric shaft.

The present application also discloses embodiments in which the damping chamber 31 is circular in cross-section in the direction of the central axis of the crankshaft 1.

The application also discloses some embodiments, the inner wall of the damping cavity 31 is provided with a damping layer, for example, a damping material is adhered to the side wall of the damping cavity 31.

The application also discloses some embodiments, the pump body assembly further comprises a compression part 4; the compression part 4 is arranged on the eccentric part 2; the damper chamber 31 has an opening 311; the compressing portion 4 is provided at the opening 311.

The present application also discloses embodiments, the outer surface of the eccentric 2 comprising an eccentric zone 22 and a proximal zone 21; the proximal region 21 is at a distance d1 from the central axis of the crankshaft 1; the eccentric area 22 is at a distance d2 from the central axis of the crankshaft 1; wherein d1< d 2.

The application also discloses some embodiments, the damping cavity 31 is arranged inside the eccentric part 2, so that the eccentric part 2 forms a hollow structure, and the damping cavity 31 is a symmetrical structure which is symmetrical about the central axis of the crankshaft 1; the thickness of the eccentric portion 2, i.e., the outer peripheral wall of the damper chamber 31, is not uniform, being smallest at the proximal region 31 and largest at the eccentric region 22.

The damping particles 32 are spherical, and when rotating, the damping particles 32 will stick to the chamber sidewall under the action of centrifugal force, resulting in a pressure pbolol.

The present application also discloses embodiments wherein the compression section 4 comprises a moving plate; the movable disc is arranged at the first end of the eccentric part 2; the movable disc comprises a shaft sleeve; the shaft sleeve is sleeved outside the eccentric part 2. The lower end of the movable disc forms the upper end of the damping cavity 31, so that the axial vibration of the movable disc can be directly excited to the damping particles 32 attached to the lower end of the movable disc due to centrifugal force, the axial vibration of the movable disc due to gas pressure is the main reason for axial vibration of the shafting, and the structure can greatly reduce the axial vibration of the shafting.

The present application also discloses embodiments wherein the opening 311 is disposed at a first end of the movable plate. The lower surface of the movable disc is used as the upper cover of the damping cavity 31, and the bottom surface of the movable disc is covered at the opening 311 of the damping cavity 31 to form a closed cavity; together with the eccentric portion 2, a NOPD structure is formed. When in use, the maximum distance of the movable disc floating up due to the back pressure is ensured to be smaller than the radius of the damping particles 32 so as to prevent the damping particles 32 from leaking. The upper end contact surface of the movable disk and the eccentric part 2 also serves as the inner wall of the damper chamber 31.

The present application also discloses some embodiments of the present invention,

wherein R is the radius of the eccentric part 2, m is the mass of the movable disc, and R is the turning radius of the movable disc; beta is the radian of the proximal area 21 extruded by the movable disc; m is the total mass of the damping particles 32; the r-sphere is the radius of gyration of the damping particles 32 at the inner wall of the damping chamber 31. The r-sphere is the average radius of gyration of all the damping particles 32 when attached to the chamber sidewall of the damping chamber 31 due to centrifugal force. The thickness of the proximal region 21 is made as thin as possible while ensuring the substantial rigidity. On the one hand, the eccentric rotation of the moving disk imparts to the crankshaft 1 a centrifugal force:

when beta is the narrowest part of the crankshaft 1 extruded by the movable disc, the radian of the crankshaft 1 extruded by the movable disc can be obtained according to material mechanics or finite element simulation. w is the angular speed of the shafting, R is the radius of the eccentric shaft, m is the mass of the movable disc, and R is the gyration radius of the movable disc.

On the other hand, the centrifugal force P of the damping particles 32 in the crankshaft 1 is determined_{Ball with ball-shaped section}＝ω²r_{Ball with ball-shaped section}M/2 π h, where r-sphere is the average radius of gyration of all damping particles 32 when they are uniformly attached to the chamber sidewall by centrifugal force. Obviously, when controlling

In this case, the maximum force applied to the proximal region 21 per cycle is only half of the original maximum force, so that the load of the crankshaft 1 can be effectively balanced, and the conditions for injecting the damping particles 32 can be obtained

Wherein the r sphere is determined by the filling rate of the damping particles 32 and the radius of the damping cavity 31 of the crankshaft 1, and M is related to the density of the single damping particles 32 and the density of the damping particles 32, that is, under the condition that the maximum radius of the damping cavity 31 is determined and given through rigidity check, the Mr sphere can be obtained by adjusting the filling rate, the material and the radius of the damping particles 32, so as to obtain the conditions given by the invention, and the problem of mutual exclusion of the rigidity of the eccentric shaft on the zone side wall and the radius of the damping cavity 31 can be effectively solved.

The present application also discloses embodiments in which the opening 311 opens into the proximal region 21.

The application also discloses embodiments, in the direction away from the movable disc, the proximal area 21 is divided into a first area and a second area in sequence; the opening 311 is disposed on the first region. Namely, the damper chamber 31 includes therein a first cylindrical hole and a second cylindrical hole arranged in this order from the top to the bottom in the axial direction of the crankshaft. The cross-sectional dimension of the first cylindrical bore is greater than the cross-sectional dimension of the second cylindrical bore. The axial length of the first cylindrical bore is greater than the length of the second cylindrical bore. I.e. the damping chamber 31 has no upper half side wall, which is formed by a moving disk sleeve forming the side wall of the damping chamber 31, forming an upper side wall contact NOPD structure, which completely eliminates the upper side wall at the narrower part of the crankshaft 1, i.e. the region 21 near the center, and a small part of the lower end is relatively thickened to a safe stiffness range, i.e. a thickened part, as shown in fig. 2.

When the movable disc overturns, the corresponding stress relation is subjected to an overturning force F; the thickened part of the crankshaft 1 is just positioned on a main stress point, so that the moving disc is not easy to overturn. The crankshaft 1 with the upper part of the side wall part completely cancels the side wall, and after the movable disc is matched with the crankshaft 1, the centrifugal force of the damping particles 32 balances a part of pressure, so that the running stability of the movable disc can be effectively ensured. The structure has smaller requirement on the rigidity of the eccentric part 2 of the crankshaft 1, and because the damping particles 32 are in direct contact with the movable disc, and the near-center area 21 is an opening 311, the problem that the near-center area 21 is subjected to periodic pressure to generate fatigue failure can be avoided. Meanwhile, the method allows the excircle of the damping cavity 31 to be directly tangent to the excircle of the crankshaft 1, so that the total capacity of the damping cavity 31 is larger, and the damping effect is better.

The application also discloses embodiments, in the direction away from the movable disc, the proximal area 21 is divided into a first part, a second part and a third part in sequence; that is, the damper chamber 31 includes a first hole, a second hole, and a third hole, which are arranged in order in the axial direction and each of which has a circular cross section, and the opening 311 is provided on the second portion. The middle position of the side wall, namely, the middle side wall contact type NOPD structure is formed, a damping cavity 31 with two narrow sides and a wide middle part is formed in the eccentric part 2, the stability is obviously more stable, when the pressure of damping particles 32 can not be effectively controlled through the force balance condition, the structure can still ensure the stability of the matching of the crankshaft 1 and the movable disc, and a larger space is still left in the middle for the NOPD cavity. This configuration also reduces the area of relative motion with the rotor and also reduces frictional losses.

The application also discloses some embodiments, the number of the NOPD damping parts is set to be at least one; when the number of NOPD damping portions is two or more, the two or more NOPD damping portions are arranged in order in the central axis direction of the crankshaft 1;

the application also discloses some embodiments, the eccentric part 2 is provided with a connecting hole; the connecting hole is superposed with the central axis of the crankshaft 1; the compression portion 4 has a connecting shaft; the connecting shaft is disposed in the connecting hole to be connected with the eccentric portion 2. The connecting shaft is a movable disc shaft.

Namely, a plurality of damping cavities 31 are formed to restrict the NOPD crankshaft 1 to be matched with a movable disc, the movable disc and the crankshaft 1 are changed into a structure that the movable disc is arranged inside and an eccentric part 2 is arranged outside, a plurality of cavities coaxial with a rotation center are arranged on the crankshaft 1, and the middle of each cavity is in clearance fit with the eccentricity of the movable disc. After the movable disc shaft is inserted, damping particles 32 are injected through a threaded hole or a pin hole reserved outside the cavity, and then a screw or a pin is driven to seal the cavity. The advantage of this construction is that the shaft, due to centrifugal forces during operation, is substantially attached to the outside and is less likely to contact the inside rotor disc, thus resulting in little friction and maximum mechanical efficiency. And the radial vibration of the movable disc can be transmitted to the middle side wall between two adjacent damping cavities 31 which is contacted with the movable disc, and is converted into axial excitation which is absorbed by the NOPD structure.

According to the embodiment of the application, a compressor is provided, and the compressor comprises a pump body assembly and the pump body assembly. The compressor may be a scroll compressor.

According to an embodiment of the application, an apparatus is provided, which includes a compressor, and the compressor is the above-mentioned compressor. The device may be an air conditioner.

Explanation of NOPD damping section: particle damping technology, namely NOPD technology, is a tiny particle damping vibration attenuation technology which is different from the traditional damping technologies such as dry friction, viscoelastic materials and the like and is proposed by Panossian in the 90 s of the 20 th century. The principle of the device is that on the basis of the original structure, the part with larger vibration is divided into chambers, and a plurality of fine particles are added in the closed chambers, and the particles lose energy generated by vibration through inelastic collision and friction. This technique mainly uses the momentum theorem that any vibration excitation can be converted into an impulse that affects the crankshaft 1 and the NOPD damper chamber 31. At the moment of starting excitation, if the damping particles 32 in the chambers which are relatively stationary with respect to each other are regarded as a whole, they and the excited body should have a common excitation speed. The larger the input impulse is without change, the smaller the disturbance is. The larger the total weight of the damping particles 32 relative to the mass M of the excited member, the larger the impulse divided by the damping particles 32, and the smaller the vibration remaining on the excited member after the impulse is dissipated by the damping particles 32. In general, the transmission of the vibration takes time, even in a structure with a relatively high mass, and if the structure is added to a portion where the vibration is severe, the damping particles 32 carry more momentum, thereby achieving a better effect. However, if the structure cannot be arranged at the most severely vibrated portion, the total weight of the damping particles 32 has to be increased to obtain a more effective effect.

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

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing are only preferred embodiments of the present application, and it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A pump body assembly, comprising:

a crankshaft (1); an eccentric part (2) is arranged on the crankshaft (1);

and a NOPD damping section; the NOPD damping portion includes a damping chamber (31) and damping particles (32); the damping cavity (31) is arranged on the eccentric part (2); the damping particles (32) are arranged in the damping cavity (31);

the pump body assembly further comprises a compression portion (4); the compression part (4) is arranged on the eccentric part (2);

the damping chamber (31) has an opening (311); the compression part (4) is arranged at the opening (311) in a covering manner;

the outer surface of the eccentric portion (2) comprises an eccentric zone (22) and a proximal zone (21); the proximal region (21) is at a distance d1 from the central axis of the crankshaft (1); the eccentric zone (22) is at a distance d2 from the central axis of the crankshaft (1); wherein d1< d 2;

the compression part (4) comprises a movable disc; the movable disc is arranged at the first end of the eccentric part (2); the movable disc comprises a shaft sleeve; the shaft sleeve is sleeved outside the eccentric part (2);

wherein the content of the first and second substances,

wherein R is the cross section radius of the eccentric part (2), m is the mass of the movable disc, and R is the gyration radius of the movable disc; beta is the radian of the proximal area (21) pressed by the movable disc; m is the total mass of the damping particles (32); r balls are the damping particles (32) in the damping cavity (31)Radius of gyration in the wall.

2. The pump block assembly according to claim 1, characterized in that said damping chamber (31) is of symmetrical configuration with respect to a central axis of said crankshaft (1);

and/or the cross section of the damping cavity (31) in the central axis direction of the crankshaft (1) is circular;

and/or the inner wall of the damping cavity (31) is provided with a damping layer.

3. Pump body assembly according to claim 1, characterized in that the damping chamber (31) is arranged inside the eccentric portion (2).

4. The pump body assembly of claim 1, wherein the opening (311) is disposed at the first end of the cam plate.

5. The pump body assembly according to claim 1, characterized in that said opening (311) opens in said proximal region (21).

6. The pump body assembly according to claim 5, characterized in that said proximal zone (21) is divided into a first zone and a second zone in succession, in a direction away from said movable disc; the opening (311) is disposed on the first region.

7. The pump block assembly according to claim 5, characterized in that said proximal zone (21) is divided into a first portion, a second portion and a third portion in succession, in a direction away from said movable plate; the opening (311) is disposed on the second portion.

8. The pump block assembly according to claim 1, wherein the number of NOPD dampers is two or more, the two or more NOPD dampers being arranged in order in a central axis direction of the crankshaft (1);

and/or a connecting hole is arranged on the eccentric part (2); the connecting hole is superposed with the central axis of the crankshaft (1); the compression part (4) is provided with a connecting shaft; the connecting shaft is arranged in the connecting hole to be connected with the eccentric part (2).

9. A compressor comprising a pump block assembly, characterized in that it is a pump block assembly as claimed in any one of claims 1 to 8.

10. An air conditioner comprising a compressor, wherein said compressor is the compressor of claim 9.