A compressor cylinder assembly, a compressor and a refrigeration device

Abstract

The utility model discloses a compressor cylinder subassembly, compressor and refrigeration plant, compressor cylinder subassembly includes: cylinder, cylinder is equipped with working cavity and the vane slot communication of working cavity, vane slot is used to accommodate the reciprocating motion of the vane of compressor's cylinder in vane slot, and vane slot includes vane slot body, and the high pressure side of vane slot body includes high pressure side upper surface, high pressure side lateral surface, high pressure side lower surface, vane is slidably arranged in vane slot, characterized by: the high pressure side of vane slot sets up guide oil hole I, guide oil hole II, the high pressure side upper surface of vane slot or high pressure side lateral surface is inclined and sets up a guide oil hole I that communicates with spring hole, and the high pressure side lower surface of vane slot or high pressure side lateral surface is inclined and sets up a guide oil hole II that communicates with spring hole, compressor includes eccentric rotor, vane and above -mentioned compressor cylinder subassembly, and the reciprocating motion of vane in vane slot is followed with eccentric rotor rotation, application compressor obtains refrigeration plant.

Description

Technical Field

[0001] This utility model belongs to the field of compressor cylinder technology, specifically relating to a compressor cylinder assembly, a compressor, and refrigeration equipment. Background Technology

[0002] Publication No. CN202545258U discloses the blade groove structure of the cylinder of an existing rolling rotor compressor. Due to the rising ambient temperature in some areas, the requirements for the overload capacity of air conditioning systems and compressors are gradually increasing, and the exhaust pressure is increasing. This leads to a large pressure difference between the suction side and the exhaust side of the blades. During the refrigerant compression process, the cylinder blades tilt excessively, the blade grooves are subjected to increased force, and the blade grooves wear more. Utility Model Content

[0003] This application provides a compressor cylinder assembly, including:

[0004] A cylinder, which has a working chamber and a blade slot communicating with the working chamber;

[0005] The blade slot is used to accommodate the reciprocating motion of the cylinder blades of the compressor within the blade slot. The blade slot includes a blade slot body, which includes a high-pressure side and a low-pressure side. The high-pressure side bears a greater pressure from the blades than the low-pressure side bears a greater pressure from the blades. 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] The blades are slidably disposed in the blade grooves;

[0007] Its characteristic 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, which communicates with the spring hole, is inclinedly opened on the upper surface of the high-pressure side of the blade slot and / or the side surface of the high-pressure side;

[0009] An oil guide hole II, which communicates with the spring hole, is inclinedly opened on the lower surface of the high-pressure side of the blade slot and / or the side surface of the high-pressure side.

[0010] The technical solution provided in this application also has the following technical features:

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

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

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

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

[0015] L2 > L3;

[0016] 0°<θ1<90°

[0017] in:

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

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

[0020] L3 is the closest 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 head;

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

[0023] L5 > L4;

[0024] L6 > L3;

[0025] 0°<θ2<90°

[0026] in:

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

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

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

[0030] Preferably, in one embodiment of this application, 0° < θ1 < 44°, 0° < θ2 < 44°.

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

[0032] Preferably, in one embodiment of this application, the plane of symmetry between oil guide hole I and 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 this application, the diameters of oil guide hole I and oil guide hole II are 5-9 mm.

[0034] Preferably, in one embodiment of this application, a compressor includes an eccentric rotor and the aforementioned compressor cylinder assembly.

[0035] Preferably, in one embodiment of this application, a refrigeration device includes the compressor described above.

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

[0037] 1. This application reduces the force on the low-pressure side of the blade groove by adding an oil guide hole to the lower end face of the cylinder and shifting the entire structure towards the high-pressure side to introduce back pressure; the refrigeration oil exposed on the upper cylinder head enters from the oil guide hole from the lower end face of the cylinder. This method can lubricate the blade groove and prevent excessive oil from being stored in the blade groove, which would increase the sliding resistance of the blade, and ultimately reduce the wear of the blade groove.

[0038] 2. This application improves the lubrication channel and increases the oil film buffer by setting a new oil guide hole II, so that the lubricating oil can be distributed more evenly to the key parts of the blade groove, thereby improving the lubrication efficiency and reducing the risk of dry friction. For the working condition where the cylinder blades are excessively tilted and the blade groove is subjected to increased force, it effectively reduces the concentrated friction caused by the blades on the groove wall in the tilted state, improves the service life of the groove body, and extends the overall operating life and maintenance cycle of the compressor. Attached Figure Description

[0039] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0040] Figure 1 This is 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 according to the present invention;

[0042] Figure 3 Schematic diagram of oil guide hole I and oil guide hole II in cross section AA of a compressor cylinder assembly according to this utility model. Figure 1 ;

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

[0044] Figure 5 This is a schematic diagram of oil guide hole I and oil guide hole II in cross section AA of a compressor cylinder assembly according to this utility model. Figure 2 ;

[0045] Components in the diagram:

[0046] 1. Oil guide hole I

[0047] 2. Oil guide hole II

[0048] 3. Spring hole

[0049] 4. Blade groove. Detailed Implementation

[0050] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings. These embodiments are only for illustrating this application and are not intended to limit the scope of this utility model.

[0051] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, 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 this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0054] A compressor is a device that "draws in, compresses, and discharges" gas. It is primarily used to increase gas pressure and achieve energy conversion, serving as the "heart" of air conditioning, refrigerators, industrial refrigeration, and pneumatic power systems. Its basic principle is to change the volume of the working chamber through internal moving parts, thereby compressing low-pressure gas into high-pressure gas and discharging it.

[0055] A rotary compressor is a compact, high-efficiency compressor widely used in air conditioning, refrigerators, and other fields. It draws in low-temperature, low-pressure refrigerant gas and outputs high-temperature, high-pressure gas through compression, thus achieving energy transfer in a thermodynamic cycle. Its working principle is as follows: an electric motor drives an eccentrically positioned 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 and forms a high-pressure chamber, completing the intake, compression, and exhaust processes.

[0056] The cylinder provides a sealed annular cavity for the compression process. The rolling rotor is mounted on an eccentric crankshaft and rotates with the shaft inside 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 extend under the action of spring force or air pressure; the outer end always sticks to the outer surface of the rotor to separate the intake chamber and the compression chamber; as the rotor rotates, it slides continuously in the slot to complete the sealing and compression of the gas.

[0058] Oil guide holes are through-holes located in or near the blade slot, mainly used for guiding and distributing lubricating oil. Their technical function is to establish an oil passage between the blade slot and the spring hole and to achieve effective lubrication between the blade and the slot.

[0059] A cylinder for a rotary compressor includes a cylinder wall formed by a ring and a sector connected to the outer surface of the ring, wherein a blade groove is formed on the inner surface of the ring, with a depth reaching the middle and upper part of the sector and axially penetrating the cylinder wall.

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

[0061] The cylinder has a working chamber and a blade groove 4 communicating with the working chamber;

[0062] The blade slot 4 is used to accommodate the reciprocating motion of the cylinder blades of the compressor within the blade slot. The blade slot 4 includes a blade slot body, which includes a high-pressure side and a low-pressure side. The high-pressure side bears a greater pressure from the blades than the low-pressure side bears a greater pressure from the blades. 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] The blade is slidably disposed in the blade groove 4;

[0064] Its features include: oil guide hole I1 and oil guide hole II2 are provided on the high-pressure side of blade groove 4;

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

[0066] An oil guide hole II2, which communicates with the spring hole 3, is opened at an angle on the lower surface of the high-pressure side of the blade groove 4 and / or the side surface of the high-pressure side.

[0067] When implementing this application, the key points are as follows: Based on the original splash lubrication, this application precisely guides the oil into key parts through channels, achieving precise oil supply, continuous lubrication, and good temperature control.

[0068] With a very small gap between the blade and the slot, lubricating oil can still enter through the oil guide hole, ensuring the continuous existence of the oil film and thus avoiding jamming, thermal expansion failure, or abnormal wear caused by dry friction. Moreover, based on the actual working conditions, this application considers the large pressure difference between the intake and exhaust sides of the blade and the excessive tilting of the cylinder blade during refrigerant compression. It precisely adjusts the oil guide hole and sets oil guide hole I1 and oil guide hole II2, which are connected to the spring hole 3, respectively corresponding to the upper and lower surfaces of the high-pressure side of the blade slot. This completely improves and overcomes this harsh working condition, especially after the initial break-in of the compressor, it can still maintain good lubrication and avoid abnormal wear.

[0069] Specifically, in one embodiment of this application, the oil guide hole I1 is disposed above the spring hole 3, and the oil guide hole II2 is disposed below the spring hole 3. This application provides a simplified technical solution with an oil guide hole disposed only on the low-pressure side of the blade groove 4.

[0070] Specifically, in one embodiment of this application, there are no sharp edges at the junction of oil guide hole I1, oil guide hole II2 and the high-pressure side.

[0071] Specifically, in one embodiment of this 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 from the offset oil guide hole I1 to the cylinder center;

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

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

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

[0080] θ1 is the angle between the centerline of the offset oil guide hole I1 and the horizontal direction, and 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 offset oil guide hole II2, which is the farthest distance from the cylinder center.

[0086] L6 is the closest 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, and the oblique tangent 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] Oil guide hole I1 and oil guide hole II2 are symmetrically arranged, L5=L1, L6=L2, θ1=θ2;

[0090] The plane of symmetry between oil guide hole I1 and 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 improves the lubrication performance of the blade groove, extends the blade life, and avoids increased wear of the blade groove; overcomes the technical defect of excessive tilting of cylinder blades during refrigerant compression under harsh working conditions with large pressure difference between the intake and exhaust sides of the blades.

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

[0093] Specifically, in one embodiment of this application, a compressor includes the aforementioned compressor cylinder assembly.

[0094] Specifically, in one embodiment of this application, a refrigeration device includes the compressor described above.

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

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

[0097] L2 > L3;

[0098] 0° < θ1 < 90°, and further, 0° < θ1 < 44°;

[0099] 0° < θ2 < 90°, and further, 0° < θ2 < 44°;

[0100] L1: The furthest distance of the offset oil guide hole I1 from the cylinder center, such as Figure 4 , 5 ;

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

[0102] L3: The closest distance from the straight section of spring hole 3 to the cylinder center, such as... Figure 5 ;

[0103] L4: Larger flat surface radius of the upper cylinder head, such as... Figure 4 ;

[0104] θ1, θ2: The angle between the center line of the offset oil guide hole and the horizontal direction. The oblique tangent direction from the inlet end of oil guide hole I1 and oil guide hole II2 to the connecting spring hole 3 points to the inner diameter of the cylinder.

[0105] L5: The furthest distance from the offset oil guide hole II2 to the cylinder center, such as Figure 5 ;

[0106] L6: The offset oil guide hole II2 is closest to the cylinder center, such as... Figure 5 ;

[0107] L5 > L4. For upper cylinder head welding machines, ensure that the blade groove is exposed in the waist-shaped hole of the upper cylinder head skirt.

[0108] L6 > L3;

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

[0110] The plane of symmetry between oil guide hole I1 and 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] This application provides symmetrical oil guide holes on the upper and lower surfaces of the cylinder wall, facing the spring holes. The oil guide holes are located on the high-pressure side of the cylinder of the blade slot. The position of the oil guide holes is limited. Considering the large pressure difference between the intake and exhaust sides of the blades and the excessive tilting of the cylinder blades during refrigerant compression, the oil guide holes are adjusted. In addition, oil guide holes I1 and II2, which are connected to the spring hole 3, are provided, corresponding to the upper and lower surfaces of the high-pressure side of the blade slot, respectively. This completely improves and overcomes this harsh working condition, keeps the compressor blade slots well lubricated, and avoids abnormal wear.

[0112] Specifically, in one embodiment of this application, CAE simulation is used to compare this application with the prior art and measure key data as a benchmark.

[0113] Compared with existing technologies, this application reduces the low-pressure side contact stress by more than 70% under the new national standard and overload conditions of 4.8MPa; the average stress on the exhaust side is reduced by more than 60%, and the maximum stress is reduced by more than 45% and 54%, respectively.

[0114] The contact stress of the blade groove in the existing mass-produced structure and the design structure of this patent were calculated using CAE simulation. The results are as follows:

[0115]

[0116] In summary, this invention aims to solve the technical problems of existing rolling rotor compressors under high load and high exhaust pressure conditions, such as increased blade tilting due to uneven force on the blades, severe local wear of the blade slots, and decreased reliability. By optimizing the design of the oil guide hole structure in the blade slots, precise lubrication channels are achieved, resulting in more uniform oil film lubrication. This effectively alleviates the impact of off-center load on the blade slot walls. This technical solution improves the adaptability of the compressor under high pressure differential conditions, extends the service life of components, reduces the wear rate, and enhances the stability and reliability of the entire machine, demonstrating promising prospects for industrial applications.

[0117] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A compressor cylinder assembly, characterized in that, include: The cylinder is provided with a working chamber and a blade groove (4) communicating with the working chamber; The blade groove (4) is used to accommodate the reciprocating motion of the cylinder blade of the compressor. The blade groove (4) includes a blade groove 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 groove body includes a high-pressure side upper surface, a high-pressure side side surface, and a high-pressure side lower surface. The blade is slidably disposed in the blade groove (4); Its features include: oil guide hole I (1) and oil guide hole II (2) provided on the high-pressure side of the blade groove (4); An oil guide hole I (1) communicating with the spring hole (3) is opened at an angle on the upper surface of the high-pressure side of the blade groove (4) and / or the side surface of the high-pressure side; An oil guide hole II (2) communicating with the spring hole (3) is opened at an angle on the lower surface of the high-pressure side of the blade groove (4) and / or the side surface of the high-pressure side.

2. A compressor cylinder assembly as described in claim 1, characterized in that, The oil guide hole I (1) is located above the spring hole (3), and the oil guide hole II (2) is located below the spring hole (3).

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

5. A compressor cylinder assembly as described in claim 4, characterized in that, 0°<θ1<44°, 0°<θ2<44°.

6. A compressor cylinder assembly as described in claim 5, characterized in that, Oil guide hole I (1) and oil guide hole II (2) are symmetrically arranged.

7. A compressor cylinder assembly as described in claim 6, characterized in that, The symmetrical plane of oil guide hole I (1) and 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 are no sharp edges at the junction of oil guide hole I (1), oil guide hole II (2) and the high-pressure side.

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

9. A compressor, characterized in that, Includes an eccentric rotor and the compressor cylinder assembly as described in any one of claims 1-8.

10. A refrigeration device, characterized in that, Includes the compressor as described in claim 9.

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