Compression assembly with noise reduction structure and Stirling refrigerator

Abstract

The utility model relates to the field of Stirling cryocoolers, in particular to a compression assembly with a noise reduction structure and a Stirling cryocooler, the compression assembly with the noise reduction structure comprises a large base, a compression air cylinder is fixedly installed in the large base, and a compression end cover is arranged at one end of the compression air cylinder. A vibration isolation ring is installed between the compression end cover and the compression air cylinder. The compression piston is arranged in the compression air cylinder in a sliding mode. The compression end cover and the compression air cylinder are elastically isolated through the vibration isolation ring, original rigid contact between the compression end cover and the compression air cylinder is replaced, and therefore when the rotating shaft drives the compression piston to reciprocate in the compression air cylinder through the crankshaft and the compression connecting rod, the vibration isolation ring elastically buffers lateral force generated by the compression piston; rigid collision between the compression cylinder and the compression end cover is avoided, so that noise generated by collision between the compression cylinder and the compression end cover is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stirling cryocooler technical field, concretely is a compression assembly and stirling cryocooler with noise reduction structure. BACKGROUND

[0002] With the continuous application of infrared technology in the field such as reconnaissance warning, guidance quality control, mid-high altitude long-range air defense, infrared focal plane detector is continuously developed, and as an important part of the infrared detector, the refrigerator provides a low-temperature working environment for the chip, and the stirling cryocooler is one of the commonly used refrigerators in the field of infrared detection.

[0003] The compression piston of the stirling cryocooler in the prior art transmits the lateral force to the compression cylinder during operation, and the reciprocating motion of the compression piston causes the compression cylinder to collide with the compression end cover, thereby generating a large noise, which is difficult to meet the increasingly high requirements of the noise of the infrared detector. UTILITY MODEL CONTENTS

[0004] The utility model discloses a compression assembly and stirling cryocooler with noise reduction structure to solve the problem in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A compression assembly with noise reduction structure comprises:

[0007] A large base is internally fixedly installed with a compression cylinder, one end of the compression cylinder is provided with a compression end cover, and a vibration isolation ring is installed between the compression end cover and the compression cylinder.

[0008] A compression piston is slidably arranged in the interior of the compression cylinder.

[0009] Preferably, a rotating shaft is rotatably installed on one side of the large base.

[0010] Preferably, a sealing ring is arranged between the compression end cover and the large base, and the sealing ring is located at the periphery of the compression cylinder.

[0011] Preferably, the vibration isolation ring is arranged on the side of the compression end cover close to the compression cylinder, one side of the vibration isolation ring is fixedly connected with the compression end cover, and the other side of the vibration isolation ring abuts against the end face of the compression cylinder close to the compression end cover.

[0012] Preferably, a containing groove is arranged on the side of the compression end cover close to the compression cylinder, and the vibration isolation ring is located in the containing groove.

[0013] Preferably, the vibration isolation ring is fixedly connected with the compression cylinder near an end face of the compression end cover.

[0014] Preferably, the vibration isolation ring is annularly arranged corresponding to the end face of the compression cylinder, and the width of the vibration isolation ring is not less than the width of the end face of the compression cylinder.

[0015] Preferably, a rotating shaft is rotatably installed on one side of the large base, and a crankshaft is fixedly connected to one end of the rotating shaft and rotatably arranged in the large base.

[0016] Preferably, a compression connecting rod is rotatably connected to one end of the compression piston through a pin shaft, and the compression connecting rod is rotatably connected with the crankshaft through a bearing.

[0017] Preferably, the compression connecting rod is arranged at an end of the compression piston away from the compression end cover.

[0018] A Stirling refrigeration machine comprising the compression assembly with the noise reduction structure.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] 1. The compression end cover and the compression cylinder are elastically isolated by the vibration isolation ring, replacing the rigid contact between the compression end cover and the compression cylinder, so that when the rotating shaft drives the compression piston to reciprocate in the compression cylinder through the crankshaft and the compression connecting rod, the vibration isolation ring elastically buffers the lateral force generated by the compression piston, avoiding rigid impact between the compression cylinder and the compression end cover, thereby reducing the noise generated by the impact between the compression cylinder and the compression end cover.

[0021] 2. By arranging the vibration isolation ring between the compression end cover and the compression cylinder, the rigid contact between the compression end cover and the compression cylinder is changed to flexible contact, increasing the axial self-adjusting ability of the compression cylinder, reducing the wear of the compression piston and the compression cylinder, and increasing the stability and reliability of the refrigeration machine. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is an axial sectional view of the rotating shaft of the utility model;

[0024] Figure 3 It is a radial sectional view of the rotating shaft of the utility model;

[0025] Figure 4 It is a schematic diagram of the compression end cover structure of the utility model;

[0026] Figure 5 It is a radial sectional view of the compression end cover of the utility model.

[0027] In the figure: large base 1, compression end cover 2, rotating shaft 3, crankshaft 31, compression cylinder 4, vibration isolation ring 5, compression connecting rod 6, compression piston 7. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the utility model, the following will be combined with the description of the drawings in an exemplary manner to be described in detail.

[0029] It should be noted that in the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the protection scope of the utility model is not limited by the specific embodiments disclosed below.

[0030] In addition, in the description of the utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0031] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. However, it is pointed out that direct connection means that the connection between the two main bodies does not form a connection relationship through the transition structure, but only through the connection structure to form a whole. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Please refer to the accompanying Figure 1 to the accompanying Figure 5 The utility model provides a compression subassembly with noise reduction structure, comprising:

[0034] Big base 1, one side of big base 1 rotatory installation has the pivot 3, and one end of pivot 3 is fixedly connected with the crankshaft 31, and pivot 3 and crankshaft 31 are preferably integrally formed, and crankshaft 31 is rotatoryly arranged in the inside of big base 1. The inside of big base 1 is fixedly installed with compression cylinder 4, and one end of compression cylinder 4 is stretched out in the outside of big base 1 and is provided with compression end cover 2 at the end, and compression end cover 2 is used for closing the opening of the end of compression cylinder 4, and optionally, compression end cover 2 is fixedly connected with big base 1, and there is sealing ring between the contact surface of compression end cover 2 and big base 1. In the embodiment, the middle area of the side of compression end cover 2 towards compression cylinder 4 is provided with recess, and the end of compression cylinder 4 towards compression end cover 2 is inserted into recess and cooperates with recess bottom wall, and the periphery of compression end cover 2 is fixedly connected with big base 1 through screw, and sealing ring is located in recess and is located at the periphery of compression cylinder 4, and sealing ring is extruded in the space formed by compression end cover 2, big base 1 and compression cylinder 4 to realize sealing. The contact surface between compression end cover 2 and compression cylinder is installed with vibration isolation ring 5, and vibration isolation ring 5 is arranged on the side of compression end cover 2 close to compression cylinder 4, and one side of vibration isolation ring 5 is fixedly connected with compression end cover 2, and the other side of vibration isolation ring 5 abuts against the end face of compression cylinder 4 close to compression end cover 2, and only one side is fixed to realize the positioning of vibration isolation ring 5. In the preferred embodiment, the side of compression end cover 2 close to compression cylinder 4 is provided with accommodating groove, and vibration isolation ring 5 is located in accommodating groove, and in the embodiment, accommodating groove is opened at the recess bottom wall of compression end cover 2. Preferably, vibration isolation ring 5 is fixedly connected with the end face of compression cylinder 4 close to compression end cover 2, further realizing the positioning of vibration isolation ring 5, and ensuring that the position of vibration isolation ring 5 does not deviate. In the preferred embodiment, vibration isolation ring 5 is annularly arranged corresponding to the end face of compression cylinder 4, and the width of vibration isolation ring 5 is not less than the width of the end face of compression cylinder 4, ensuring the noise reduction effect between compression cylinder and compression end cover.

[0035] The compression piston 7 is slidably arranged in the interior of the compression cylinder 4, and the compression piston 7, the compression end cover 2 and the compression cylinder 4 form a compression cavity, one end of the compression piston 7 is rotatably connected with the compression connecting rod 6 through a pin shaft, the compression connecting rod 6 is rotatably connected with the crankshaft 31 through a bearing, and the compression connecting rod 6 is arranged at the end of the compression piston 7 away from the compression end cover 2. Specifically, the pin shaft is vertically arranged in the compression piston 7, one end of the compression connecting rod 6 is provided with a small ring, and the other end is provided with a large ring, the small ring is rotatably connected with the pin shaft through a bearing, and the large ring is rotatably connected with the crankshaft 31 through a bearing, when the crankshaft 31 rotates with the rotating shaft 3, the eccentric part of the crankshaft 31 generates an abutting force on the compression connecting rod 6, and the compression connecting rod 6 drives the compression piston 7 to reciprocate along the compression cylinder 4.

[0036] The compression assembly with the noise reduction structure provided by the utility model sets the vibration isolation ring 5 in the interior of the compression end cover 2, elastically isolates the compression end cover 2 and the compression cylinder 4 through the vibration isolation ring 5, replaces the rigid contact between the compression end cover 2 and the compression cylinder 4, so that when the rotating shaft 3 drives the compression piston 7 to reciprocate in the interior of the compression cylinder 4 through the crankshaft 31 and the compression connecting rod 6, the vibration isolation ring 5 elastically buffers the lateral force generated on the compression piston 7, avoids the rigid impact between the compression cylinder 4 and the compression end cover 2, and reduces the noise generated by the impact between the compression cylinder 4 and the compression end cover 2.

[0037] As a further improvement of the utility model, the vibration isolation ring 5 is arranged between the compression end cover 2 and the compression cylinder 4, the rigid contact between the compression end cover 2 and the compression cylinder 4 is changed into flexible contact, the axial self-adjusting ability of the compression cylinder 4 is increased, the wear between the compression piston 7 and the compression cylinder 4 is reduced, and the stability of the operation of the refrigerating machine and the reliability of the whole machine are increased.

[0038] The utility model also provides a stirling refrigerating machine, including the compression assembly with the noise reduction structure above, also includes motor assembly and expander assembly, motor assembly drives rotating shaft 3 to rotate, expander assembly also with crankshaft 31 transmission connection, the compression machine assembly and expander assembly work together under the drive of motor assembly and produce refrigeration effect.

[0039] Those skilled in the art will understand that the discussion of any of the above embodiments is merely exemplary and is not intended to limit the scope of the utility model (including claims) to these examples; under the concept of the utility model, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above, which are not provided in details for the sake of brevity.

[0040] The utility model aims at all such replacement, modification and deformation falling into the wide range of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement and the like made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A compression component with a noise reduction structure, characterized in that, include: A large base (1) is provided with a compression cylinder (4) fixedly installed inside the large base (1). A compression end cover (2) is provided at one end of the compression cylinder (4). A vibration isolation ring (5) is installed between the compression end cover (2) and the compression cylinder. A compression piston (7) is slidably disposed inside the compression cylinder (4).

2. The compression assembly with a noise reduction structure according to claim 1, characterized in that, The compression end cap (2) is fixedly connected to the large base (1).

3. The compression assembly with a noise reduction structure according to claim 2, characterized in that, A sealing ring is provided between the compression end cap (2) and the large base (1), and the sealing ring is located on the periphery of the compression cylinder (4).

4. The compression assembly with a noise reduction structure according to claim 1, characterized in that, The vibration isolation ring (5) is disposed on the side of the compression end cover (2) near the compression cylinder (4), and one side of the vibration isolation ring (5) is fixedly connected to the compression end cover (2), and the other side of the vibration isolation ring (5) abuts against one end face of the compression cylinder (4) near the compression end cover (2).

5. The compression assembly with a noise reduction structure according to claim 4, characterized in that, The compression end cap (2) is provided with a receiving groove on the side near the compression cylinder (4), and the vibration isolation ring (5) is located in the receiving groove.

6. The compression assembly with a noise reduction structure according to claim 4, characterized in that, The vibration isolation ring (5) is fixedly connected to one end face of the compression cylinder (4) near the compression end cover (2).

7. The compression assembly with a noise reduction structure according to claim 4, characterized in that, The vibration isolation ring (5) is arranged in a ring shape corresponding to the end face of the compression cylinder (4), and the width of the vibration isolation ring (5) is not less than the width of the end face of the compression cylinder (4).

8. The compression assembly with a noise reduction structure according to claim 1, characterized in that, A rotating shaft (3) is rotatably mounted on one side of the large base (1), and a crankshaft (31) is fixedly connected to one end of the rotating shaft (3). The crankshaft (31) is rotatably disposed inside the large base (1).

9. The compression assembly with a noise reduction structure according to claim 8, characterized in that, One end of the compression piston (7) is rotatably connected to the compression connecting rod (6) via a pin, and the compression connecting rod (6) is rotatably connected to the crankshaft (31) via a bearing.

10. A Stirling refrigerator, characterized in that, The compression component with a noise reduction structure as described in any one of claims 1-9.

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