A pump body structure and a compressor

Abstract

The present disclosure provides a pump body structure and a compressor. The pump body structure includes a cylinder and a roller. The roller is disposed in the cylinder and can move in the cylinder to compress gas. A first protrusion and a first groove are provided on the inner peripheral wall of the cylinder, and the first protrusion and the first groove are alternately connected in the circumferential direction to form a first structure. A second protrusion and a second groove are provided on the outer peripheral wall of the roller, and the second protrusion and the second groove are alternately connected in the circumferential direction to form a second structure. The first protrusion can be engaged with the second groove, and the second protrusion can be engaged with the first groove. During the movement of the roller, the first structure meshes with the second structure. According to the present disclosure, the heat dissipation area of the cylinder and the roller is significantly increased, thereby improving the heat dissipation efficiency of the pump body itself, expanding the original cylinder, and increasing the refrigerating capacity of the cylinder.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and particularly to a pump body structure and a compressor. Background Art

[0002] The pump body assembly is the core component of the compressor during operation, and is the basic component for realizing its compression function, belonging to the core of the compressor. The refrigerating capacity of the compressor is closely related to the structure of the pump body. With the development of rotary compressors, especially the continuous development of variable-frequency compressors, the limitations of the structures and materials of traditional compressors have begun to emerge, which to varying degrees hinder the development of rotary compressors towards higher frequencies and energy conservation.

[0003] As a moving component of the pump body, in existing rotary compressors, the outer circle of the roller is in direct contact with the cylinder, generating a large amount of heat due to friction during operation. Even though lubricating oil can play a certain role in cooling, the lubrication effect will decrease when the oil temperature is too high. Therefore, how to dissipate heat and reduce the temperature of the pump body is crucial; at the same time, during the design process of the compressor, in order to improve the refrigerating capacity, the refrigerating capacity is usually increased by increasing the cylinder volume, which often requires changing the overall volume of the compressor, making the design cumbersome and the compressor becoming heavy.

[0004] The prior art has no obvious improvement in the structure of the compressor. Only the design of a heat dissipation device is carried out outside the compressor pump body or outside the compressor. The pump body itself still has low heat dissipation efficiency, and an additional structure needs to be added on the basis of the original components of the compressor, increasing the volume of the compressor and the production cost; for the design of a new pump body structure, a method similar to gear meshing is adopted, which will further increase its heat generation and is not conducive to heat dissipation.

[0005] Due to the large amount of heat generated by the friction between the roller and the cylinder in the roller compressor in the prior art, but its heat dissipation efficiency is low. The usual structure is to set a heat dissipation device outside the pump body, but its heat dissipation efficiency is still low, resulting in a relatively high overall temperature of the compressor system. And adding an additional structure outside the compressor pump body will increase the volume of the compressor and increase the cost and other technical problems. Therefore, the present disclosure researches and designs a pump body structure and a compressor.

[0006] Disclosed content

[0007] Therefore, the technical problem to be solved by the present disclosure is to overcome the defect that the roller compressor in the prior art generates a large amount of heat due to the friction between the roller and the cylinder, but has low heat dissipation efficiency, so as to provide a pump body structure and a compressor.

[0008] To solve the above problems, the present disclosure provides a pump body structure, which includes:

[0009] A cylinder and a roller, the roller is disposed in the cylinder and can move in the cylinder to compress gas, and a first protrusion and a first groove are provided on the inner peripheral wall of the cylinder, and the first protrusion and the first groove are alternately connected in the circumferential direction to form a first structure, a second protrusion and a second groove are provided on the outer peripheral wall of the roller, and the second protrusion and the second groove are alternately connected in the circumferential direction to form a second structure, the first protrusion can be engaged in the second groove, and the second protrusion can be engaged in the first groove; and during the movement of the roller, the first structure meshes with the second structure.

[0010] In some embodiments, the first structure is a first corrugated structure, the second structure is a second corrugated structure, and in the cross-section of the cylinder, the corrugated curve equation of the first corrugated structure is

[0011]

[0012] where ρ(t) 1 is the corrugated curve of the first corrugated structure, R 1 is the central circle radius of the first corrugated structure, A 1 is the sine curve amplitude of the first corrugated structure, is the sine curve phase of the first corrugated structure, t is the rotation angle, and t = 0 to 2π;

[0013] In the cross-section of the roller, the corrugated curve equation of the second corrugated structure is:

[0014]

[0015] where ρ(t) 2 is the corrugated curve of the second corrugated structure, R 2 is the central circle radius of the second corrugated structure, A 2 is the sine curve amplitude of the second corrugated structure, is the sine curve phase of the second corrugated structure, t is the rotation angle, and t = 0 to 2π.

[0016] In some embodiments, in the cylinder where is the circumferential radius corresponding to the trough of the corrugated curve of the first corrugated structure of the cylinder, is the circumferential radius corresponding to the peak of the corrugated curve of the first corrugated structure of the cylinder.

[0017] In some embodiments, in the roller where is the circumferential radius corresponding to the trough of the corrugated curve of the second corrugated structure of the roller, The circumferential radius corresponding to the wave crest of the corrugated curve of the second corrugated structure of the roller.

[0018] In some embodiments, 2A in the corrugated curve equation of the first corrugated structure of the cylinder 1 <Cylinder wall thickness H;

[0019] 2A in the corrugated curve equation of the second corrugated structure of the roller 2 <Roller wall thickness h;

[0020] A in the corrugated curve equation of the first corrugated structure and the corrugated curve equation of the second corrugated structure 1 = A 2 ;

[0021] R in the corrugated curve equation of the first corrugated structure and the corrugated curve equation of the second corrugated structure 2 <R 1 .

[0022] In some embodiments, in the corrugated curve equation of the first corrugated structure and the corrugated curve equation of the second corrugated structure, and The value of satisfies the relational expression R 1 :

[0023] In some embodiments, R 1 = 18 - 22, A 1 = 0.2 - 0.8,

[0024] R 2 = 12 - 18, A 2 = 0.2 - 0.8,

[0025] In some embodiments, the length of the first structure along the axial direction of the cylinder is equal to the axial length of the cylinder; the length of the second structure along the axial direction of the roller is equal to the axial length of the roller.

[0026] In some embodiments, the cylinder is directly cast into a corrugated shape and then precision machined, or the corrugated shape is cut on the inner wall of the cylindrical cylinder by wire cutting; and / or,

[0027] The roller is directly cast into a corrugated shape and then precision machined, or the corrugated shape is cut on the outer wall of the cylindrical roller by wire cutting.

[0028] The present disclosure also provides a compressor, which includes the pump body structure described in any one of the preceding items.

[0029] The pump body structure and the compressor provided by the present disclosure have the following beneficial effects:

[0030] By arranging first protrusions and first grooves alternately in the circumferential direction on the inner wall of the cylinder, a first corrugated structure in the circumferential direction is formed. At the same time, second protrusions and second grooves are arranged alternately in the circumferential direction on the outer peripheral wall of the roller to form a second corrugated structure in the circumferential direction. The first protrusions can be engaged into the second grooves, and the second protrusions can be engaged into the first grooves. During the movement of the roller, the second protrusions on the roller can be engaged with the first protrusions of the cylinder, and the corrugated curve of the outer ring of the roller coincides with the corrugated curve of the inner ring of the cylinder. The cylinder is divided into a high-pressure area and a low-pressure area by the sliding vane. Each time the crankshaft drives the roller to rotate one week, a compression cycle is completed. Through the above structure, the heat dissipation area of the cylinder and the roller is significantly increased, thereby improving the heat dissipation efficiency of the pump body itself. At the same time, due to the engagement of the corrugated structures, the rolling friction is increased, and the sliding friction between the original roller and the cylinder is reduced, so that the friction can be reduced, the heat generation can be reduced, and the vibration and noise can be reduced, and the service life of the compressor can be extended; the cooperation scheme of the cylinder and the roller can be used as an improvement scheme for the existing cylinder. Since the wave troughs of the corrugated roller in the present disclosure are the outer circle dimensions of the original roller, the present disclosure effectively increases the area on the circumferential surface of the roller rotation, and similarly increases the circumferential surface area of the inner wall of the cylinder, thereby expanding the original cylinder and increasing the refrigerating capacity of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is an internal sectional view of the pump body structure of the compressor of the present disclosure;

[0032] Figure 2 is of the present disclosure Figure 1 a top view structure diagram of the cylinder in;

[0033] Figure 3 is for Figure 2 a partial enlarged view of part A in;

[0034] Figure 4 is of the present disclosure Figure 1 a top view structure diagram of the roller in;

[0035] Figure 5 is for Figure 4 a partial enlarged view of part B in;

[0036] Figure 6 a top view structure diagram of the cooperation between the roller and the cylinder of the present disclosure.

[0037] The reference numerals are shown as:

[0038] 1. Cylinder; 10. First corrugated structure; 11. First protrusion; 12. First groove; 2. Roller; 20. Second corrugated structure; 21. Second protrusion; 22. Second groove; 3. Lower flange; 4. Upper flange; 5. Crankshaft; 6. Rotor; 7. Stator; 8. Housing. Detailed implementation

[0039] As Figures 1-6 shown, the present disclosure provides a pump body structure, which includes:

[0040] A cylinder 1 and a roller 2, the roller 2 is disposed in the cylinder 1 and can move in the cylinder 1 to compress gas, and a first protrusion 11 and a first groove 12 are provided on the inner peripheral wall of the cylinder 1, and in the circumferential direction, the first protrusion 11 and the first groove 12 are alternately connected to form a first structure 10, a second protrusion 21 and a second groove 22 are provided on the outer peripheral wall of the roller 2, and in the circumferential direction, the second protrusion 21 and the second groove 22 are alternately connected to form a second structure 20, the first protrusion 11 can be engaged in the second groove, and the second protrusion 21 can be engaged in the first groove 12; and during the movement of the roller, the first structure and the second structure are engaged with each other.

[0041] And during the movement of the roller 2, the first structure 10 is matched with the second structure 20, so that the first protrusion 11 is disengaged from the previous second groove 22 and enters the next second groove 22, and the second protrusion 21 is disengaged from the previous first groove 12 and enters the next first groove 12.

[0042] The present disclosure forms a first structure in the circumferential direction by providing first protrusions and first grooves that alternate in the circumferential direction on the inner wall of the cylinder. At the same time, second protrusions and second grooves that alternate in the circumferential direction are provided on the outer peripheral wall of the roller to form a second structure in the circumferential direction. The first protrusions can be inserted into the second grooves, and the second protrusions can be inserted into the first grooves. During the movement of the roller, the second protrusions on the roller can engage with the first protrusions of the cylinder, and the corrugated curve of the outer ring of the roller coincides with the corrugated curve of the inner ring of the cylinder. The cylinder is divided into a high-pressure area and a low-pressure area by the sliding vane. Each time the crankshaft drives the roller to rotate one week, a compression cycle is completed. Through the above structure, the heat dissipation area of the cylinder and the roller is significantly increased, thereby improving the heat dissipation efficiency of the pump body itself. At the same time, due to the engagement of the corrugated structure, the rolling friction is increased, and the sliding friction between the original roller and the cylinder is reduced, so that the friction can be reduced, the heat generation can be reduced, and the vibration and noise can be reduced, improving the service life of the compressor. The cooperation scheme of the cylinder and the roller can be used as an improvement scheme for the existing cylinder. Since the wave trough of the corrugated roller in the present disclosure is the outer diameter of the original roller, the present disclosure effectively increases the area on the circumferential surface where the roller rotates, and similarly increases the circumferential surface area of the inner wall of the cylinder, thereby expanding the original cylinder and increasing the refrigerating capacity of the cylinder.

[0043] The outer circle of the roller 2 and the inner circle of the cylinder 1 can be closely engaged. When the roller 2 rotates driven by the crankshaft 5, it can still be closely engaged with the inner circle of the cylinder during the rotation process, and the intake and exhaust are completed in one rotation. The roller is driven by the crankshaft to perform translational and rotational motions in the cylinder. However, the outer circle of the roller is always rotating. Therefore, it is possible to achieve the engagement by means of grooves and protrusions. When the amplitude is large, it can be achieved. Similar to gear engagement, the protrusions constantly engaging and disengaging from the grooves during the movement process will not cause an increase in friction.

[0044] The novel compressor structure proposed by the present disclosure provides new ideas and methods for designing the volume size and refrigerating capacity size of the compressor. The concave and convex design is carried out on the original circumference, so that the circumference increases and the volume increases. It is not only possible to design the refrigerating capacity by increasing the volume of the compressor, but also possible to design a new refrigerating capacity on the basis of the original model, which can greatly reduce the design work. In addition, for the corrugated cylinder and roller, the contact area becomes larger and the heat dissipation area becomes larger, which can effectively improve the heat dissipation efficiency and reduce the energy consumption.

[0045] The present disclosure provides a novel compressor and its compression mechanism, including a lower flange 3, a roller 2, a cylinder 1, an upper flange 4, a crankshaft 5, a rotor 6, and a stator 7 disposed in a housing 8.

[0046] The pump body structure of the compressor has remarkable features. Its pump body structure mainly includes a lower flange 3 at the bottom of the compressor, a roller 2 and a cylinder 1 that cooperate with each other above the lower flange, and a motor composed of a rotor 6 and a stator 7 that drives a crankshaft 5 to rotate. The roller 2 is sleeved at the eccentric circle of the crankshaft, and an upper flange 4 and the lower flange 3 form a sealed working chamber.

[0047] In some embodiments, the first structure is a first corrugated structure 10, and the second structure is a second corrugated structure 20. In the cross-section of the cylinder, the corrugated curve equation of the first corrugated structure 10 is

[0048]

[0049] where ρ(t) 1 is the corrugated curve of the first corrugated structure 10, R 1 is the central circle radius of the first corrugated structure 10, A 1 is the sine curve amplitude of the first corrugated structure 10, is the sine curve phase of the first corrugated structure 10, that is, the number of corrugation periods, t is the rotation angle, and t = 0 to 2π;

[0050] In the cross-section of the roller, the corrugated curve equation of the second corrugated structure is:

[0051]

[0052] where ρ(t) 2 is the corrugated curve of the second corrugated structure 20, R 2 is the central circle radius of the second corrugated structure, A 2 is the sine curve amplitude of the second corrugated structure 20, is the sine curve phase of the second corrugated structure 20, t is the rotation angle, and t = 0 to 2π.

[0053] and can be arbitrary, and the value of this affects the number of corrugations within the circumference. and The larger they are, the more and denser the corrugation numbers are; the smaller they are, the fewer and sparser the corrugation numbers are. The corrugated curve is the concave and convex grooves formed along the circumference, which is a periodic corrugated curve.

[0054] This is the preferred structural form of the first corrugated structure and the second corrugated structure of the present disclosure, which can effectively ensure the stable meshing between the two corrugated curves. The outer circle corrugations of the roller can form a stable meshing with the inner circle corrugations of the cylinder, and the entire compression chamber can be expanded on the basis of the original size.

[0055] In some embodiments, in the cylinder wherein is the circumferential radius corresponding to the wave trough of the corrugation curve of the first corrugated structure 10 of the cylinder, is the circumferential radius corresponding to the wave crest of the corrugation curve of the first corrugated structure 10 of the cylinder. These are the preferred structural dimensions of the cylinder of the present disclosure, that is, the center circle radius is the wave crest radius minus the curve amplitude, and the center circle radius is the wave trough radius plus the curve amplitude.

[0056] In some embodiments, among the rollers wherein is the circumferential radius corresponding to the wave trough of the corrugation curve of the second corrugated structure 20 of the roller, is the circumferential radius corresponding to the wave crest of the corrugation curve of the second corrugated structure 20 of the roller. These are the preferred structural dimensions of the roller of the present disclosure, that is, the center circle radius is the wave crest radius minus the curve amplitude, and the center circle radius is the wave trough radius plus the curve amplitude.

[0057] In some embodiments, in the corrugation curve equation of the first corrugated structure 10 of the cylinder, 2A 1 <cylinder wall thickness H;

[0058] In the corrugation curve equation of the second corrugated structure 20 of the roller, 2A 2 <roller wall thickness h;

[0059] In the corrugation curve equation of the first corrugated structure 10 and the corrugation curve equation of the second corrugated structure 20, A 1 = A 2 ;

[0060] In the corrugation curve equation of the first corrugated structure 10 and the corrugation curve equation of the second corrugated structure 20, R 2 <R 1 .

[0061] In order to ensure stable meshing between the cylinder and the roller, the amplitudes of the corrugation curves of the inner circle of the cylinder and the outer circle of the roller must be the same; it is inevitable that the inner circle of the cylinder must be larger than the outer circle of the roller, otherwise there will be no compression volume and the compression effect cannot be achieved.

[0062] In some embodiments, in the corrugation curve equations of the first corrugated structure 10 and the second corrugated structure 20, after the R 1 and R 2 dimensions of the inner circle of the cylinder and the outer circle of the roller are determined, and take values that satisfy the relationship R 1 : To ensure the stable meshing of the cylinder and the roller, the wavelengths of the corrugated curve on the inner circle of the cylinder and the corrugated curve on the outer circle of the roller must be the same, and the same wavelength means the same period and phase.

[0063] In some embodiments, R 1 = 18 - 22, A 1 = 0.2 - 0.8,

[0064] R 2 = 12 - 18, A 2 = 0.2 - 0.8,

[0065] Preferably, R 1 = 20, A 1 = 0.5, Preferably, R 2 = 15, A 2 = 0.5,

[0066] In some embodiments, the length of the first corrugated structure 10 along the axial direction of the cylinder 1 is equal to the axial length of the cylinder 1; the length of the second corrugated structure 20 along the axial direction of the roller 2 is equal to the axial length of the roller 2. The first corrugated structure of the present disclosure is equal to the axial length of the cylinder along the axial direction, and can mesh with the second corrugated structure on the roller over the entire axial length, improving the meshing effect, increasing the heat dissipation area, and increasing the compression volume and compression space of the compressor pump body structure, improving the refrigerating capacity, and further improving the vibration damping effect.

[0067] The cylinder and the roller can stably mesh during the operation of the compressor to form a complete suction and exhaust process. As mentioned before, ensuring the consistency of the amplitude and wavelength of the curve is to ensure stable meshing. The cylinder is stationary, and the outer circle of the roller rotates along the inner circle of the cylinder, and it is always stably meshed and will not come out. The outer circle of the roller is smaller than the inner circle of the cylinder itself, so that the suction and exhaust can be completed.

[0068] In some embodiments, the cylinder is directly cast into a corrugated shape and then finely machined, or the corrugated shape is cut on the inner wall of the cylindrical cylinder by wire cutting; and / or,

[0069] The roller is processed by directly casting the corrugated shape and then performing finish machining, or by wire cutting the outer wall of the roller in a ring column shape to cut the corrugated shape. This is the preferred processing method for the first corrugated structure on the cylinder and the second corrugated structure on the roller of the present disclosure, and it can be processed by the method of casting + finish machining or by wire cutting. The corrugated inner circle of the cylinder is corrugated after wire cutting and then finely ground by a grinding machine to obtain the finished product. The inner circle of the roller 2 is the mating surface with the eccentric circle of the crankshaft, and rough grinding → finish grinding can be performed. The rough machining of the corrugated shape of the outer circle of the roller 2 is completed by wire cutting, and then the outer circle is finely ground by a grinding machine.

[0070] The present disclosure also provides a compressor (preferably a roller compressor), which includes the pump body structure described in the previous item. The present disclosure proposes a new type of compressor and its compression mechanism, including a pump body structure and a motor arranged in a housing. The pump body mainly includes a crankshaft, an upper flange, a cylinder with an irregularly shaped compression chamber, an irregularly shaped roller, and a lower flange. The working chamber of the compressor mechanism is composed of the roller, the cylinder, and the upper and lower flanges. The motor drives the crankshaft to drive the roller to rotate at a high speed. The corrugated curve of the outer ring of the roller coincides with the corrugated curve of the inner ring of the cylinder. The cylinder is divided into a high-pressure area and a low-pressure area by a sliding vane. Each time the crankshaft drives the roller to rotate one week, a compression cycle is completed.

[0071] The overall beneficial effects are as follows: A new type of compressor pump body structure includes a cylinder with an irregularly shaped inner hole and a roller with an irregularly shaped outer circle. The irregular shape inside the irregularly shaped cylinder is the corrugated inner hole and the outer circle of the roller described in the text. Due to the special shape, the heat dissipation area of the cylinder and the roller is increased, the heat dissipation efficiency is improved, and the service life of the compressor is extended; this cylinder solution can be used as an improvement solution for the existing cylinder, expanding the original cylinder and increasing the refrigerating capacity of the cylinder; taking the original circle as the wave valley of the corrugation, making the wave valley increases the area on the basis of the original circle, so that the volume of the cylinder is increased. Since the roller and the cylinder in the present disclosure have a corrugated structure, the effects of vibration reduction and noise reduction can be achieved to a certain extent.

[0072] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure. The above is only the preferred implementation manner of the present disclosure. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present disclosure, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. A pump body structure, characterized in that: comprising: a cylinder (1) and a roller (2), the roller (2) is arranged in the cylinder (1) and can move in the cylinder (1) to compress gas, and a first protrusion (11) and a first groove (12) are arranged on the inner peripheral wall of the cylinder (1), and in the circumferential direction, the first protrusion (11) and the first groove (12) are alternately connected to form a first structure, and a second protrusion (21) and a second groove (22) are arranged on the outer peripheral wall of the roller (2), and in the circumferential direction, the second protrusion (21) and the second groove (22) are alternately connected to form a second structure, and during the movement of the roller (2), the first structure meshes with the second structure; the first protrusion (11) can be engaged in the second groove (22), and the second protrusion (21) can be engaged in the first groove (12); The cylinder (1) is divided into a high-pressure area and a low-pressure area by a sliding vane. Each time the crankshaft drives the roller to rotate one week, a compression cycle is completed. During the movement of the roller, the first protrusion (11) disengages from the previous second groove (22) and enters the next second groove (22), and the second protrusion (21) disengages from the previous first groove (12) and enters the next first groove (12).

2. The pump body structure according to claim 1, characterized in that: the first structure is a first corrugated structure (10), the second structure is a second corrugated structure (20), and in the cross-section of the cylinder, the corrugated curve equation of the first corrugated structure is where ρ(t) 1 is the corrugation curve of the first corrugated structure (10), R 1 is the central circle radius of the first corrugated structure (10), A 1 is the sine curve amplitude of the first corrugated structure (10), is the sine curve circular frequency of the first corrugated structure (10), t is the rotation angle, and t = 0 to 2π; In the cross-section of the roller, the corrugated curve equation of the second corrugated structure is: where ρ(t) 2 is the corrugation curve of the second corrugated structure (20), R 2 is the central circle radius of the second corrugated structure, A 2 is the sine curve amplitude of the second corrugated structure (20), is the sine curve circular frequency of the second corrugated structure (20), t is the rotation angle, and t = 0 to 2π.

3. The pump body structure according to claim 2, characterized in that: In the corrugation curve equation of the first corrugation structure (10) of the cylinder, 2A 1 <cylinder wall thickness H; In the corrugation curve equation of the second corrugation structure (20) of the roller, 2A 2 <roller wall thickness h; In the corrugation curve equation of the first corrugation structure (10) and the corrugation curve equation of the second corrugation structure (20), A 1 = A 2 ; In the corrugation curve equations of the first corrugation structure (10) and the second corrugation structure (20), R 2 <R 1 .

4. The pump body structure according to claim 2, characterized in that: In the corrugation curve equations of the first corrugation structure (10) and the second corrugation structure (20), and take values that satisfy the relational expression 5. The pump body structure according to any one of claims 1-4, characterized in that: the length of the first structure in the axial direction of the cylinder (1) is equal to the axial length of the cylinder (1); the length of the second structure in the axial direction of the roller (2) is equal to the axial length of the roller (2).

6. The pump body structure according to any one of claims 2-4, characterized in that: the cylinder is directly cast into a corrugated shape and then finely processed, or the corrugated shape is cut on the inner wall of the circular cylindrical cylinder by wire cutting; and / or, the roller is directly cast into a corrugated shape and then finely processed, or the corrugated shape is cut on the outer wall of the circular cylindrical roller by wire cutting.

7. A compressor, characterized in that: comprising the pump body structure according to any one of claims 1-6.

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