Compressor cylinder assembly, compressor and refrigeration equipment

Abstract

The invention discloses a compressor air cylinder assembly, a compressor and refrigeration equipment, the compressor air cylinder assembly comprises an air cylinder, and the air cylinder is provided with a working cavity and a blade groove communicated with the working cavity; the blade groove is used for containing a blade of an air cylinder of the compressor to do reciprocating motion in the blade groove and comprises a blade groove body. The high-pressure side of the blade groove body comprises a high-pressure side upper surface, a high-pressure side surface and a high-pressure side lower surface; the blade is arranged in the blade groove in a sliding manner; the impeller is characterized in that an oil guide hole I and an oil guide hole II are formed in the high-pressure side of the blade groove; an oil guide hole I communicated with the spring hole is obliquely formed in the upper surface of the high-pressure side or / and the side surface of the high-pressure side of the blade groove; an oil guide hole II communicated with the spring hole is obliquely formed in the lower surface of the high-pressure side or / and the side surface of the high-pressure side of the blade groove; the compressor comprises an eccentric rotor, blades and the compressor air cylinder assembly, and the blades reciprocate in the blade grooves along with rotation of the eccentric rotor. And applying a compressor to obtain the refrigeration equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor cylinders, and in particular relates to a compressor cylinder assembly, a compressor and a refrigeration device. Background Art

[0002] Publication No. CN202545258U discloses the blade groove structure of the cylinder of an existing rolling rotor compressor. Due to the increase in ambient temperature in some areas, the requirements for air-conditioning systems and compressor overload capacity are gradually increasing, and the exhaust pressure is increasing. This leads to a large pressure difference between the suction and exhaust sides of the blades. During the refrigerant compression process, the cylinder blades are excessively tilted, the force on the blade groove increases, and the blade groove wear increases. Summary of the Invention

[0003] The present application provides a compressor cylinder assembly, comprising:

[0004] A cylinder, wherein the cylinder is provided with a working chamber and a blade slot communicating with the working chamber;

[0005] The blade slot is used to accommodate the blades of the compressor cylinder so that they reciprocate therein. The blade slot includes a blade slot body, which includes a high-pressure side and a low-pressure side. The pressure borne by the blades on the high-pressure side is greater than the pressure borne by the blades on the low-pressure side. The high-pressure side of the blade slot body includes a high-pressure side upper surface, a high-pressure side side surface, and a high-pressure side lower surface.

[0006] a blade slidably disposed in the blade slot;

[0007] The feature is that: oil guide hole I and oil guide hole II are provided on the high pressure side of the blade slot;

[0008] An oil guide hole I communicating with the spring hole is obliquely provided on the upper surface of the high-pressure side of the blade groove or / and the side surface of the high-pressure side;

[0009] An oil guide hole II communicated with the spring hole is obliquely provided on the lower surface of the high-pressure side or / and the side surface of the high-pressure side of the blade groove.

[0010] A technical solution provided by this application also has the following technical features:

[0011] Preferably, in one embodiment of the present application, the oil guide hole I is arranged above the spring hole, and the oil guide hole II is arranged below the spring hole.

[0012] Preferably, in one embodiment of the present application, the junction between the oil guide hole I, the oil guide hole II and the high-pressure side has no sharp corners.

[0013] Preferably, in one embodiment of the present application, the oil guide hole I and the oil guide hole II intersect at the spring hole.

[0014] Preferably, in one embodiment of the present application, L1>L4;

[0015] L2>L3;

[0016] 0°<θ1<90°

[0017] in:

[0018] L1 is the farthest distance between the offset oil guide hole I and the cylinder center;

[0019] L2 is the shortest distance between the offset oil guide hole I and the cylinder center;

[0020] L3 is the shortest distance between the straight part of the spring hole and the center of the cylinder;

[0021] L4 is the radius of the large plane of the upper cylinder cover;

[0022] θ1 is the angle between the center line of the offset oil guide hole I and the horizontal direction. The oblique direction from the inlet end of the oil guide hole I to the connecting spring hole points to the cylinder inner diameter;

[0023] L5>L4;

[0024] L6>L3;

[0025] 0°<θ2<90°

[0026] in:

[0027] L5 is the farthest distance between the offset oil guide hole II and the cylinder center;

[0028] L6 is the shortest distance between the offset oil guide hole II and the cylinder center;

[0029] θ2 is the angle between the center line of the offset oil guide hole II and the horizontal direction. The oblique direction from the inlet end of the oil guide hole II to the connecting spring hole points to the inner diameter of the cylinder.

[0030] Preferably, in an embodiment of the present application, 0°<θ1<44°, 0°<θ2<44°.

[0031] Preferably, in one embodiment of the present application, the oil guide hole I and the oil guide hole II are symmetrically arranged.

[0032] Preferably, in one embodiment of the present application, the symmetry plane of the oil guide hole I and the oil guide hole II is the center plane between the upper surface of the high-pressure side and the lower surface of the high-pressure side.

[0033] Preferably, in one embodiment of the present application, the diameters of the oil guide holes I and II are 5-9 mm.

[0034] Preferably, in one embodiment of the present application, a compressor includes an eccentric rotor and the above-mentioned compressor cylinder assembly.

[0035] Preferably, in one embodiment of the present application, a refrigeration device includes the above-mentioned compressor.

[0036] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention.

[0037] 1. This application adds an oil guide hole to the cylinder's lower end surface and offsets it toward the high-pressure side to introduce back pressure, thereby reducing the force on the low-pressure side of the vane groove. The refrigeration oil is exposed to the upper cylinder cover and enters the lower end surface of the cylinder through the oil guide hole. This method can lubricate the vane groove and prevent excessive oil from being stored in the vane groove, which increases the sliding resistance of the vane, ultimately achieving the effect of reducing vane groove wear.

[0038] 2. This application sets up a new oil guide hole II to improve the lubrication channel and increase the oil film buffer zone, so that the lubricating oil can be more evenly distributed to the key parts of the blade groove, thereby improving lubrication efficiency and reducing the risk of dry friction. For working conditions where the cylinder blades are excessively tilted and the force on the blade groove increases, the concentrated friction caused by the blades on the groove wall in the tilted state is effectively reduced, thereby improving the service life of the groove body and extending the overall operating life and maintenance cycle of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0040] Figure 1 A perspective view of a compressor cylinder assembly according to the present invention;

[0041] Figure 2 This is a front view of a compressor cylinder assembly of the present invention;

[0042] Figure 3 Schematic diagram of oil guide hole I and oil guide hole II of the AA section of a compressor cylinder assembly of the present invention Figure 1 ;

[0043] Figure 4 This is a schematic diagram of an application of a compressor cylinder assembly of the present invention;

[0044] Figure 5 Schematic diagram of oil guide hole I and oil guide hole II of the AA section of a compressor cylinder assembly of the present invention Figure 2 ;

[0045] Components in the picture:

[0046] 1. Oil guide hole Ⅰ

[0047] 2. Oil guide hole II

[0048] 3. Spring hole

[0049] 4. Blade groove. DETAILED DESCRIPTION

[0050] The following further describes the specific embodiments of the present application in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present application and are not intended to limit the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0054] A compressor is a device that "inhales, compresses, and discharges" gas, primarily used to increase gas pressure and achieve energy conversion. It is the "heart" of air conditioners, refrigerators, industrial refrigeration, and gas power systems. Its basic principle is to compress low-pressure gas into high-pressure gas by changing the volume of the working chamber through internal moving parts.

[0055] Rolling rotor compressors are compact, high-efficiency compressors widely used in air conditioners, refrigerators, and other fields. They draw in low-temperature, low-pressure refrigerant gas and, through compression, deliver high-temperature, high-pressure gas, achieving energy transfer in the thermodynamic cycle. Their working principle is as follows: an electric motor drives an eccentrically mounted rotor to rotate within a fixed cylindrical cylinder. The space between the rotor and the cylinder is divided into an intake chamber and a compression chamber by spring-driven blades. As the rotor rotates, the intake chamber gradually shrinks to form a high-pressure chamber, completing the intake, compression, and exhaust processes.

[0056] The cylinder provides a closed annular cavity for the compression process. The rolling rotor is installed on the eccentric crankshaft and rotates with the shaft in the cylinder, maintaining a narrow gap with the inner wall of the cylinder to achieve dynamic sealing.

[0057] The blades are assembled in fixed blade slots and extended by spring force or air pressure. The outer ends always adhere to the outer surface of the rotor to separate the suction chamber from the compression chamber. As the rotor rotates, they continuously slide in the slots to complete the sealing and compression of the gas.

[0058] The oil guide hole is a through-hole set in the blade groove or its adjacent part, which is mainly used to guide and distribute the lubricating oil. Its technical function is to establish an oil passage between the blade groove and the spring hole and realize effective lubrication between the blade and the groove;

[0059] A cylinder for a rotary compressor comprises a cylinder wall formed by a circular ring and a sector connected to the outer circumferential surface of the circular ring, wherein a blade groove is formed on the inner circumferential surface of the circular ring, the blade groove extending to the middle and upper part of the sector and axially extending through the cylinder wall;

[0060] like Figure 1-5 , a compressor cylinder assembly, comprising:

[0061] A cylinder, wherein the cylinder is provided with a working chamber and a blade slot 4 communicating with the working chamber;

[0062] The blade slot 4 is used to accommodate the blades of the compressor cylinder to reciprocate in the blade slot. The blade slot 4 includes a blade slot body, which includes a high-pressure side and a low-pressure side. The pressure from the blade on the high-pressure side is greater than the pressure from the blade on the low-pressure side. The high-pressure side of the blade slot body includes a high-pressure side upper surface, a high-pressure side side surface, and a high-pressure side lower surface.

[0063] a blade slidably disposed in the blade slot 4;

[0064] The feature is that: the high pressure side of the blade slot 4 is provided with an oil guide hole Ⅰ1 and an oil guide hole Ⅱ2;

[0065] An oil guide hole I1 communicating with the spring hole 3 is obliquely formed on the upper surface or / and the side surface of the high-pressure side of the blade groove 4;

[0066] An oil guide hole II 2 communicating with the spring hole 3 is obliquely formed on the lower surface of the high-pressure side or / and the side surface of the high-pressure side of the blade groove 4 .

[0067] When this application is implemented, the implementation points are as follows: Based on the original splash lubrication, this application accurately guides the oil to flow into key parts through the channel, with accurate oil supply, continuous lubrication and good temperature control effects;

[0068] The gap between the blade and the groove is extremely small, and the lubricating oil can still enter through the oil guide hole, ensuring the continuous existence of the oil film, thereby avoiding seizure, thermal expansion failure or abnormal wear caused by dry friction; and this application is based on the actual working conditions, taking into account the large pressure difference between the suction side and the exhaust side of the blade, and the excessive tilt of the cylinder blade during the refrigerant compression process, and accurately adjusts the oil guide hole, and provides oil guide hole Ⅰ1 and oil guide hole Ⅱ2 that pass through the spring hole 3, corresponding to the upper surface and lower surface of the high-pressure side of the blade groove respectively, to completely improve and overcome this harsh working condition, especially after the initial running-in of the compressor, it can still maintain good lubrication and avoid abnormal wear.

[0069] Specifically, in one embodiment of the present application, the oil guide hole I1 is arranged above the spring hole 3, and the oil guide hole II2 is arranged below the spring hole 3. The present application provides a simplified technical solution in which the oil guide hole is only arranged on the low-pressure side of the blade slot 4.

[0070] Specifically, in one embodiment of the present application, the junction between the oil guide hole I1, the oil guide hole II2 and the high-pressure side has no sharp corners.

[0071] Specifically, in one embodiment of the present application, the oil guide hole I1 and the oil guide hole II2 intersect at the spring hole 3;

[0072] L1>L4;

[0073] L2>L3;

[0074] 0°<θ1<90°

[0075] in:

[0076] L1 is the farthest distance between the offset oil guide hole Ⅰ1 and the cylinder center;

[0077] L2 is the shortest distance between the offset oil guide hole Ⅰ1 and the cylinder center;

[0078] L3 is the shortest distance between the straight part of spring hole 3 and the center of the cylinder;

[0079] L4 is the radius of the large plane of the upper cylinder cover;

[0080] θ1 is the angle between the center line of the offset oil guide hole Ⅰ1 and the horizontal direction. The oblique direction from the inlet end of the oil guide hole Ⅰ1 to the connecting spring hole 3 points to the inner diameter of the cylinder;

[0081] L5>L4;

[0082] L6>L3;

[0083] 0°<θ2<90°

[0084] in:

[0085] L5 is the farthest distance between the offset oil guide hole Ⅱ2 and the cylinder center;

[0086] L6 is the shortest distance between the offset oil guide hole Ⅱ2 and the cylinder center;

[0087] θ2 is the angle between the centerline of the offset oil guide hole II2 and the horizontal direction. The oblique direction from the inlet end of the oil guide hole II2 to the connecting spring hole 3 points to the inner diameter of the cylinder;

[0088] 0°<θ1<44°, 0°<θ2<44°.

[0089] The oil guide hole I1 and the oil guide hole II2 are symmetrically arranged, L5 = L1, L6 = L2, θ1 = θ2;

[0090] The symmetry plane of the oil guide hole I1 and the oil guide hole II2 is the center plane between the upper surface of the high-pressure side and the lower surface of the high-pressure side.

[0091] This application has the following technical features: significantly improving the lubrication performance of the blade groove, extending the blade life, and avoiding increased blade groove wear; overcoming the technical defect of excessive tilting of the cylinder blades during the refrigerant compression process under harsh working conditions with large pressure difference between the suction side and the exhaust side of the blade.

[0092] Specifically, in one embodiment of the present application, the diameters of the oil guide holes I1 and II2 are 5-9 mm.

[0093] Specifically, in one embodiment of the present application, a compressor includes the above-mentioned compressor cylinder assembly.

[0094] Specifically, in one embodiment of the present application, a refrigeration device includes the above-mentioned compressor.

[0095] Specifically, in one embodiment of the present application, Figure 1-5 , the oil guide hole Ⅰ1 and the oil guide hole Ⅱ2 are set offset to the high pressure side as a whole;

[0096] L1>L4, for upper cylinder head welding models, ensure that the blade groove is exposed at the waist-shaped hole of the upper cylinder head skirt;

[0097] L2>L3;

[0098] 0°<θ1<90°, further, 0°<θ1<44°;

[0099] 0°<θ2<90°, further, 0°<θ2<44°;

[0100] L1: The farthest distance between the offset oil guide hole Ⅰ1 and the cylinder center, such as Figure 4 、 5 ;

[0101] L2: The shortest distance between the offset oil guide hole Ⅰ1 and the cylinder center, such as Figure 5 ;

[0102] L3: The shortest distance between the straight line portion of spring hole 3 and the center of the cylinder, such as Figure 5 ;

[0103] L4: Radius of the large surface of the upper cylinder head, such as Figure 4 ;

[0104] θ1, θ2: The angles between the centerline of the offset oil guide hole and the horizontal direction. The oblique directions from the inlet end of the oil guide hole Ⅰ1 and the oil guide hole Ⅱ2 to the connecting spring hole 3 are both pointing to the cylinder inner diameter;

[0105] L5: The farthest distance between the offset oil guide hole Ⅱ2 and the cylinder center, such as Figure 5 ;

[0106] L6: The shortest distance between the offset oil guide hole Ⅱ2 and the cylinder center, such as Figure 5 ;

[0107] L5>L4, for upper cylinder head welding models, ensure that the blade groove is exposed at the waist-shaped hole of the upper cylinder head skirt;

[0108] L6>L3;

[0109] The oil guide hole I1 and the oil guide hole II2 are symmetrically arranged. When the oil guide hole I1 and the oil guide hole II2 are symmetrically arranged, L5 = L1, L6 = L2, and θ2 = θ1;

[0110] The symmetry plane of the oil guide hole I1 and the oil guide hole II2 is the center plane between the upper surface of the high-pressure side and the lower surface of the high-pressure side.

[0111] The present application sets oil guide holes symmetrically on the upper and lower surfaces of the cylinder wall toward the spring hole; the oil guide holes are opened on the cylinder on the high-pressure side of the blade groove; the position of the oil guide holes is limited, considering the large pressure difference between the suction side and the exhaust side of the blade, the excessive tilt of the cylinder blade during the refrigerant compression process, the oil guide holes are adjusted, and oil guide holes Ⅰ1 and oil guide holes Ⅱ2 are set to pass through the spring hole 3, corresponding to the upper surface and lower surface of the high-pressure side of the blade groove respectively, to completely improve and overcome this harsh working condition, so that the blade groove of the compressor remains well lubricated and avoids abnormal wear.

[0112] Specifically, in one embodiment of the present application, the present application is compared with the prior art through CAE simulation, and key data are measured as measurement indicators;

[0113] Compared with the existing technology, the present application shows that under the new national standard and 4.8MPa overload conditions, the contact stress on the low-pressure side is reduced by more than 70%; the average stress on the exhaust side is reduced by more than 60%, and the maximum values ​​are reduced by more than 45% and 54% respectively;

[0114] CAE simulation was used to calculate the contact stress of the blade slots of the existing mass-produced structure and the patented design structure. The results are as follows:

[0115]

[0116] In general, the present invention aims to solve technical problems such as increased inclination of blades due to uneven force on blades, severe local wear of blade grooves, and decreased reliability when existing rolling rotor compressors operate under high load and high exhaust pressure conditions; by optimizing the design of the oil guide hole structure of the blade groove, setting oil guide holes to achieve precise lubrication channels and more uniform oil film lubrication; effectively alleviating the eccentric load impact on the blade groove wall; this technical solution improves the adaptability of the compressor under high pressure difference conditions, extends the service life of components, reduces the wear rate, enhances the stability and reliability of the entire machine, and has good industrial application prospects.

[0117] The above 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 substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A compressor cylinder assembly, characterized in that: include: A cylinder, the cylinder being provided with a working chamber and a blade slot (4) communicating with the working chamber; The blade slot (4) is used to accommodate blades of a compressor cylinder so as to reciprocate in the blade slot. The blade slot (4) comprises a blade slot body, the blade slot body comprises a high-pressure side and a low-pressure side, the pressure borne by the blades on the high-pressure side is greater than the pressure borne by the blades on the low-pressure side; the high-pressure side of the blade slot body comprises a high-pressure side upper surface, a high-pressure side side surface, and a high-pressure side lower surface. A blade is slidably arranged in the blade groove (4); The invention is characterized in that: an oil guide hole I (1) and an oil guide hole II (2) are provided on the high pressure side of the blade slot (4); An oil guide hole I (1) communicating with the spring hole (3) is obliquely provided on the upper surface of the high-pressure side or / and the side surface of the high-pressure side of the blade groove (4); An oil guide hole II (2) communicating with the spring hole (3) is obliquely provided on the lower surface of the high-pressure side or / and the side surface of the high-pressure side of the blade groove (4).

2. A compressor cylinder assembly according to claim 1, characterized in that: The oil guide hole I (1) is arranged above the spring hole (3), and the oil guide hole II (2) is arranged below the spring hole (3).

3. A compressor cylinder assembly according to claim 2, characterized in that: The oil guide hole I (1) and the oil guide hole II (2) intersect at the spring hole (3).

4. A compressor cylinder assembly according to claim 3, characterized in that: L1>L4; L2>L3; 0°<θ1<90° in: L1 is the farthest distance between the offset oil guide hole Ⅰ (1) and the cylinder center; L2 is the shortest distance between the offset oil guide hole Ⅰ (1) and the cylinder center; L3 is the shortest distance between the straight portion of the spring hole (3) and the center of the cylinder; L4 is the radius of the large plane of the upper cylinder cover; θ1 is the angle between the center line of the offset oil guide hole I (1) and the horizontal direction, and the oblique direction from the inlet end of the oil guide hole I (1) to the connecting spring hole (3) points to the inner diameter of the cylinder; L5>L4; L6>L3; 0°<θ2<90° in: L5 is the farthest distance between the offset oil guide hole II (2) and the cylinder center; L6 is the shortest distance between the offset oil guide hole II (2) and the cylinder center; θ2 is the angle between the center line of the offset oil guide hole II (2) and the horizontal direction, and the oblique direction from the inlet end of the oil guide hole II (2) to the connecting spring hole (3) points to the inner diameter of the cylinder.

5. A compressor cylinder assembly according to claim 4, characterized in that: 0°<θ1<44°, 0°<θ2<44°.

6. A compressor cylinder assembly according to claim 5, characterized in that: The oil guide hole I (1) and the oil guide hole II (2) are symmetrically arranged.

7. A compressor cylinder assembly according to claim 6, characterized in that: The symmetry plane of the oil guide hole I (1) and the oil guide hole II (2) is the center plane between the upper surface of the high-pressure side and the lower surface of the high-pressure side; there is no sharp corner at the junction of the oil guide hole I (1), the oil guide hole II (2) and the high-pressure side.

8. A compressor cylinder assembly according to claim 6, characterized in that: The diameters of the oil guide holes I (1) and II (2) are 5-9 mm.

9. A compressor, characterized in that: The invention comprises an eccentric rotor and a compressor cylinder assembly according to any one of claims 1 to 8.

10. A refrigeration device, characterized in that: Including the compressor according to claim 9.

Images