Compressor cylinder and rotor compressor

Abstract

The utility model provides a compressor air cylinder and a rotor type compressor. The compressor air cylinder comprises a cylinder body with a compression space, a thickening part arranged on the periphery of one side of the cylinder body and blades. The cylinder body is provided with a blade groove extending to the thickening part; the blades are inserted into the blade grooves in a sliding manner and protrude towards the inner circumferential surface of the cylinder body to be divided into a plurality of compression chambers by a compression space; the blades are provided with groove structures. The groove structures are arranged on the blades, refrigerants can enter blade grooves and form liquid film lubrication along with reciprocating motion of the blades, so that direct friction between solid materials is avoided to a certain extent, meanwhile, the heat dissipation area is increased by the groove structures, heat between friction pairs is dissipated in time, the problem of abrasion is solved, and the service life of the blade is prolonged. And the reliability of the pump body assembly and the reliability and performance of the whole machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compressor cylinder and a rotor type compressor. Background Art

[0002] The rotor refrigerant pump is mainly composed of two parts: the motor and the pump body assembly. The motor and the pump body assembly are connected by an eccentric crankshaft. The motor and the pump body assembly are encapsulated in a shell as a whole, and the shell is provided with an inlet and outlet. The pump body assembly mainly includes the cylinder, the eccentric part of the crankshaft, the rolling rotor, the upper / lower cylinder cover, the blades and other components. The long axis of the crankshaft is connected to the motor rotor, and the motor drives the crankshaft to rotate. The rolling rotor is installed on the eccentric part of the crankshaft and rolls along the inner wall of the cylinder. The outer diameter of the rolling rotor and the inner diameter of the cylinder form a crescent-shaped working chamber. The blade is closely contacted with the rolling rotor at its end by the action of the spring, and the crescent-shaped working chamber is divided into two parts: the suction chamber and the compression discharge chamber; the refrigerant liquid is sucked into an expanded cavity from the input pipe, and then as the volume shrinks, the refrigerant liquid is pushed and obtains a certain head and discharges the pump body into the output pipe.

[0003] The blades in the rotor refrigerant pump make linear reciprocating motion during operation, playing the role of isolating the high-pressure chamber from the low-pressure chamber. However, due to the operating conditions and the characteristics of the refrigerant, the blades will be worn to a certain extent, which will greatly affect the performance.

[0004] It should be noted that the information of the utility model in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to those skilled in the art. Utility Model Content

[0005] In view of the problems in the prior art, the purpose of the utility model is to provide a compressor cylinder and a rotor compressor, wherein the blades of the compressor cylinder are provided with a groove structure, which can bring the refrigerant into the blade groove and form a liquid film lubrication, thereby reducing the direct friction between solid materials and increasing the heat dissipation area, thereby reducing the wear of the blades and improving the reliability of the pump body assembly and the performance of the whole machine.

[0006] A first aspect of the utility model provides a compressor cylinder, comprising a cylinder body having a compression space, a thickened portion arranged at the outer periphery of one side of the cylinder body, and a blade;

[0007] The cylinder body is provided with a blade groove extending to the thickened portion;

[0008] The vanes are inserted into the vane grooves in a sliding manner and protrude toward the inner peripheral surface of the cylinder body to divide the compression space into a plurality of compression chambers;

[0009] The blade is provided with a groove structure.

[0010] According to the first aspect of the utility model, in the direction extending from the cylinder body to the thickened portion, the blade includes a first portion, a second portion, a third portion and a back pressure portion, and the end surface of the second portion close to the first portion is lower than the end surface of the first portion on the same side to form a groove structure arranged on the blade.

[0011] According to the first aspect of the utility model, the depth of the groove structure gradually increases along the direction extending from the thickened portion to the cylinder body.

[0012] According to the first aspect of the utility model, the end surface of the second portion forming the groove structure is a plane.

[0013] According to the first aspect of the utility model, the end surface of the second portion forming the groove structure is an arc-shaped surface.

[0014] According to the first aspect of the utility model, the length of the first portion is L1, the stroke of the blade is S1, and the following conditions are satisfied:

[0015] 2.5mm≤L1<S1.

[0016] According to the first aspect of the utility model, the thickness of the blade is H2, and the maximum depth of the groove structure is H1, which satisfies:

[0017] H1﹤H2-2.0mm.

[0018] According to a first aspect of the utility model, the sum of the lengths of the first portion and the second portion is L2, and the total length of the first portion, the second portion and the third portion is L4, satisfying:

[0019] L2≤L4-2.5mm.

[0020] A second aspect of the utility model provides a rotor type compressor, comprising the compressor cylinder.

[0021] The utility model provides a groove structure on the blade. As the blade reciprocates, the refrigerant can enter the blade groove and form a liquid film lubrication, thereby avoiding direct friction between solid materials to a certain extent. At the same time, the groove structure increases the heat dissipation area, so that the heat between the friction pairs is dissipated in time, thereby solving the problem of wear and tear and improving the reliability of the pump body assembly and the reliability and performance of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0023] Figure 1This is a schematic structural diagram of a compressor cylinder according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of a blade according to an embodiment of the utility model;

[0025] Figure 3 A side view of a blade according to an embodiment of the present invention; and

[0026] Figure 4 This is a side view of a blade according to another embodiment of the present invention. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the utility model will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and should not be construed as limitations on the utility model. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0028] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The utility model below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the utility model of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0031] The utility model provides a compressor cylinder and a rotor compressor, wherein the compressor cylinder comprises a cylinder body having a compression space, a thickened portion arranged at the periphery of one side of the cylinder body, and a blade; the cylinder body is provided with a blade groove extending to the thickened portion; the blade is inserted into the blade groove in a sliding manner, and protrudes toward the inner peripheral surface of the cylinder body to divide the compression space into a plurality of compression chambers; the blade is provided with a groove structure. The utility model provides a groove structure on the blade, and as the blade reciprocates, the refrigerant can enter the blade groove and form a liquid film lubrication, thereby avoiding direct friction between solid materials to a certain extent. At the same time, the groove structure increases the heat dissipation area, so that the heat between the friction pairs is dissipated in time, thereby solving the problem of wear and tear, and improving the reliability of the pump body assembly and the reliability and performance of the whole machine.

[0032] The structure of the compressor cylinder and the rotary compressor of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0033] Figure 1 This is a schematic structural diagram of a compressor cylinder of an embodiment of the utility model, wherein the compressor cylinder includes a cylinder body 11 having a compression space C, a thickened portion 12 and a blade 13 arranged at the periphery of one side of the cylinder body 11; the cylinder body 11 is provided with a blade groove 121 extending to the thickened portion 12; the blade 13 is inserted into the blade groove 121 in a sliding manner, and protrudes toward the direction of the inner circumferential surface of the cylinder body 11 to divide the compression space C into a plurality of compression chambers; the blade 13 is provided with a groove structure.

[0034] Figure 2Schematic diagram of the structure of the blade of an embodiment of the utility model, extending from the cylinder body 11 to the direction of the thickened portion 12, the blade 13 includes a first portion I, a second portion II, a third portion III and a back pressure portion 131, the end surface of the second portion close to the first portion is lower than the end surface of the first portion to form a groove structure provided on the blade, that is, more specifically, the end surface of the second portion facing the low-pressure chamber forms a groove structure with the end surface of the first portion, when the pump body assembly is assembled, the blade groove 121 on the cylinder, the second portion II of the blade 13 and the cylinder cover form a structure that can accommodate refrigerant, it should be noted that the width of the groove structure provided on the blade 13 is consistent with the width W of the blade 13, see Figure 1 ; The first part I of the blade 13 contacts the piston 2. When the compressor is running, the blade 13 reciprocates in the blade groove 121 and divides the compression space C of the cylinder 11 into a suction chamber and a compression chamber. The blade 13 forms a kinematic pair with the cylinder 11 and the thickened portion 12 provided with the blade groove 121. When the first part I of the blade 13 moves from the inner circumference away from the cylinder 11 to the compression space C, the groove structure of the blade 13 gradually contacts the refrigerant and the refrigerant gradually fills the groove structure with the movement of the blade 13. When the blade 13 reciprocates and enters the blade groove 121 again under the action of the driving force of the piston 2, the blade 13 will bring the refrigerant in the groove structure into the blade groove 121.

[0035] Figure 3 The figure is a side view of a blade of an embodiment of the utility model, wherein the first part I of the blade 13 (the part close to the piston) is a straight section, that is, its thickness can be the thickness of the blade, and its end face is perpendicular to the low-pressure surface of the compressor. In some other embodiments, or the end face of the first part I can be inclined relative to the low-pressure surface of the compressor. The function of the first part I of the blade 13 is that when the groove structure of the blade 13 is filled with refrigerant and enters the blade groove 121 again, the first part I of the blade 13 can provide a force to push the refrigerant in the groove structure, so that the refrigerant enters the blade groove 121 together with the blade 13, so that liquid film lubrication can be formed after the refrigerant enters. The length of the first part I of the blade 13 is L1, and the stroke of the blade 13 is S1. Preferably, 2.5mm≤L1<S1, that is, to ensure processing feasibility, L1 needs to be greater than or equal to 2.5mm. At the same time, in order to ensure that after one end of the blade 13 enters the compression space C, the groove structure also enters the compression space C and can be filled with refrigerant therein, the length of the first part I of the blade 13 needs to be less than the design stroke S1 of the blade 13. See Figure 1 .

[0036] In the embodiment, along the direction extending from the thickened portion 12 to the cylinder body 11, the vertical distance of the end face of the second part II of the blade 13 relative to the end face of the first part gradually increases, that is, the depth of the groove structure gradually increases, and the cross-section of the groove structure is an asymmetric V-shape, and the V-angle of the groove structure is θ. The short side of the asymmetric V-shaped groove structure (the height difference between the end face of the first part I and the end face of the second part II at that location) can be regarded as the depth of the groove structure, and the long side of the asymmetric V-shaped groove structure is the end face of the second part II. The end face A of the second part II can be a plane. Figure 4 This is a side view of a blade 13 according to another embodiment of the present invention, wherein the end surface A' of the second portion II may also be a curved surface.

[0037] If the thickness of the blade 13 is H2, the two side end faces of the first part I of the blade 13 and the third part III of the blade 13 are the two end faces of the blade that mainly bear pressure, and usually, the thickness of the two is the same, so the thickness of the blade 13 can be regarded as the thickness of the first part I of the blade 13 or the third part III of the blade 13. The maximum depth of the groove structure is H1, preferably, H1﹤H2-2.0mm, at this time, it can be ensured that when the blade 13 is reciprocated into the blade groove 121, the refrigerant can enter the gap between the blade 13 and the cylinder body 11 / thickened part 12 to form a kinematic pair.

[0038] The sum of the lengths of the first part I and the second part II of the blade 13 is L2. To ensure that the groove structure can be filled with as much refrigerant as possible, theoretically, the length of the second part II is as long as possible. However, to ensure the formation of the groove structure and the strength of the edge of the groove structure, preferably, L2≤L4-2.5mm. Among them, L4 is the total length of the first part I, the second part II and the third part III of the blade 13, and L4 is also called the effective length of the blade 13.

[0039] The utility model also provides a rotor compressor, including the compressor cylinder, wherein the blades of the rotor compressor are provided with a groove structure, and the blades move with the piston. When the piston gradually approaches the blade groove, the refrigerant in the groove structure is brought into the groove structure, so that there is liquid in the groove structure and the liquid refrigerant in the groove structure has a speed along the blade movement direction relative to the blade groove, so that the refrigerant forms a dynamic pressure between the groove structure and the cylinder, and the previous boundary lubrication state is improved to a liquid film lubrication state. When the piston moves away from the blade groove, the blade will gradually move away from the blade groove, bringing out the refrigerant in the groove structure, thereby performing heat exchange with the newly entered refrigerant. Due to the increase in the contact area, the temperature of the blade is reduced, which takes less time and is more efficient than the design without a groove structure. Finally, the wear of the blades is improved or even solved through the two aspects of force and heat dissipation, thereby improving the wear resistance of the blades and the reliability of the compressor operation.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0041] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A compressor cylinder, characterized in that: It comprises a cylinder body having a compression space, a thickened portion arranged at the outer periphery of one side of the cylinder body, and a blade; The cylinder body is provided with a blade groove extending to the thickened portion; The vanes are inserted into the vane grooves in a sliding manner and protrude toward the inner peripheral surface of the cylinder body to divide the compression space into a plurality of compression chambers; The blade is provided with a groove structure.

2. The compressor cylinder according to claim 1, characterized in that Along the direction extending from the cylinder body to the thickened portion, the blade includes a first portion, a second portion, a third portion and a back pressure portion, and an end surface of the second portion close to the first portion is lower than an end surface of the first portion to form a groove structure arranged on the blade.

3. The compressor cylinder according to claim 2, characterized in that Along the direction extending from the thickened portion to the cylinder body, the depth of the groove structure gradually increases.

4. The compressor cylinder according to claim 3, characterized in that The end surface of the second portion is planar.

5. The compressor cylinder according to claim 3, characterized in that: The end surface of the second portion is an arc-shaped surface.

6. The compressor cylinder according to claim 2, characterized in that The length of the first part is L1, and the stroke of the blade is S1, which satisfies: 2.5mm≤L1<S1.

7. The compressor cylinder according to claim 1, characterized in that The thickness of the blade is H2, and the maximum depth of the groove structure is H1, which satisfies: H1﹤H2-2.0mm.

8. The compressor cylinder according to claim 2, characterized in that The sum of the lengths of the first portion and the second portion is L2, and the total length of the first portion, the second portion and the third portion is L4, satisfying: L2≤L4-2.5mm.

9. A rotor compressor, characterized in that: Comprising the compressor cylinder according to any one of claims 1 to 8.

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