Refrigerating machine rotor structure and refrigerating machine

Abstract

The utility model relates to the technical field of rotary integral Stirling cryocoolers, in particular to a cryocooler rotor structure and a cryocooler, which comprises a large base component, a rotor outer cover component is arranged at the upper end of the large base component, and a cavity is formed in the large base component and the rotor outer cover component; the rotor assembly is arranged in the cavity and comprises a rotating shaft 5, the outer surface of the rotating shaft 5 is sleeved with a plurality of bearings, a connecting piece is arranged between at least one bearing and the rotating shaft 5, and the at least one bearing is fixed to the rotating shaft 5 through the connecting piece; the device has the beneficial effects that the rotating shaft, the first deep groove ball bearing, the pushing bearing, the compression bearing and the second deep groove ball bearing are axially fixed through the first pin shaft, the second pin shaft, the connecting rod space ring and the third pin shaft so as to transmit torque; the connecting positions of the rotating shaft, the first deep groove ball bearing, the pushing bearing, the compression bearing and the second deep groove ball bearing can be prevented from being abraded and adhered, and the maintainability of the refrigerating machine is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of rotating integral Stirling refrigerator technology, specifically to a refrigerator rotor structure and a refrigerator. Background Technology

[0002] A refrigeration machine is a machine that transfers heat from a cooled object at a lower temperature to the surrounding medium to obtain cooling capacity.

[0003] With the continuous application of infrared technology in reconnaissance and alarm, guidance and control, and long-range air defense at medium and high altitudes, infrared focal plane detectors are constantly developing. Rotary integral Stirling refrigerators, with their small size, light weight, and high efficiency, are used in infrared detectors to provide a low-temperature working environment for the chips. With the diversification of application scenarios (such as liquid nitrogen temperature range, high temperature range, etc.), infrared focal plane detectors are constantly developing towards higher reliability. Rotary integral Stirling refrigerators are usually composed of two parts: a compressor and an expander. Driven by the drive components, the rotor assembly rotates, thereby driving the compressor and expander to move. There is a fixed phase difference between the accumulator in the expander and the compression piston in the compressor, so that the movement of the accumulator always leads the compression piston by a phase angle, thereby producing a highly efficient cooling effect. The motion transmission between the rotor assembly and the push assembly of the rotary integral refrigerator is through the contact between the cam structure on the rotating shaft and the bearing on the compression and push assembly, thereby driving the compression and push assembly to reciprocate.

[0004] Because of the clearance fit between the refrigeration unit's shaft and bearings, relative movement will occur, affecting the refrigeration unit's start-up. At the same time, during the operation of the refrigeration unit, the shaft is prone to wear and rust, causing internal contamination. To avoid the shaft from rusting, polishing during rework will lead to dimensional deviations. Furthermore, when disassembling the refrigeration unit, the shaft and the inner ring of the bearing are corroded and difficult to remove. Utility Model Content

[0005] The purpose of this invention is to provide a refrigeration rotor structure and a refrigeration machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A refrigeration rotor structure and a refrigeration machine, comprising:

[0008] A large base assembly, wherein a rotor cover assembly is provided at the upper end of the large base assembly, and the interior of the large base assembly and the rotor cover assembly form a cavity;

[0009] A rotor assembly is disposed within the cavity. The rotor assembly includes a rotating shaft, the outer surface of which is fitted with a plurality of bearings, and at least one bearing is connected to the rotating shaft via a connecting member. The at least one bearing is fixed to the rotating shaft via the connecting member.

[0010] Preferably, the bearing includes a first deep groove ball bearing, a pusher bearing, and a second deep groove ball bearing. The rotor housing assembly and the large base assembly are rotatably connected to the rotating shaft via the first deep groove ball bearing and the second deep groove ball bearing, respectively. The pusher bearing is disposed on the eccentric portion of the rotating shaft. The first deep groove ball bearing, the pusher bearing, and the second deep groove ball bearing are all fixed to the rotating shaft by connecting members.

[0011] Preferably, the inner rings of the first deep groove ball bearing, the pusher bearing, and the second deep groove ball bearing are all provided with a first groove;

[0012] The connector includes a first pin, a second pin, and a third pin. The first pin, the second pin, and the third pin are respectively inserted into the first grooves opened on the first deep groove ball bearing, the pusher bearing, and the second deep groove ball bearing, and are fixedly connected to the rotating shaft.

[0013] Preferably, the large base assembly includes a large base, the large base having a first receiving groove capable of accommodating a second deep groove ball bearing, and adhesive being coated between the second deep groove ball bearing and the first receiving groove; the rotor outer cover assembly includes a rotor outer cover, the rotor outer cover having a second receiving groove capable of accommodating a first deep groove ball bearing, and adhesive being coated between the first deep groove ball bearing and the second receiving groove.

[0014] Preferably, the bearing further includes a compression bearing disposed on the eccentric portion of the shaft and located between the push bearing and the second deep groove ball bearing;

[0015] A connecting rod assembly is provided between the compression bearing and the push bearing, and the compression bearing and the push bearing are connected by the connecting rod assembly.

[0016] Preferably, the connecting rod assembly includes a connecting rod spacer, and the upper and lower end faces of the connecting rod spacer are provided with a plurality of protrusions distributed in a circumferentially spaced manner;

[0017] Both the compression bearing and the push bearing have a second groove on one end face near each of the protrusions, which can accommodate each of the protrusions.

[0018] Preferably, the connecting rod spacer has an annular structure, and one end of the rotating shaft passes through the connecting rod spacer and connects to the second deep groove ball bearing.

[0019] Preferably, a bearing spacer is provided between the compression bearing and the second deep groove ball bearing. The bearing spacer is sleeved on the rotating shaft, and a third groove is provided on the bearing spacer. The bearing spacer is fixedly connected to the rotating shaft through the cooperation of the third groove and the third pin.

[0020] Preferably, the rotor assembly further includes a motor rotor, which is disposed outside the end of the shaft near the first deep groove ball bearing, and a counterweight is also disposed on the outer surface of the shaft, the counterweight being located between the motor rotor and the push bearing.

[0021] Preferably, the refrigerator rotor structure further includes a compression assembly and a pushing assembly, wherein the compression assembly is connected to a compression bearing, and the pushing assembly is connected to a pushing bearing.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. The components used in the mechanism of this utility model have simple structures and are easy to process;

[0024] 2. In this utility model, the rotating shaft, the first deep groove ball bearing, the push bearing, the compression bearing, and the second deep groove ball bearing are axially fixed by the first pin, the second pin, the connecting rod spacer, and the third pin, respectively, so as to transmit torque, thereby improving the starting reliability and operating efficiency of the refrigeration unit.

[0025] 3. The shaft and the first deep groove ball bearing, the pusher bearing, the compression bearing, and the second deep groove ball bearing are axially fixed by the first pin, the second pin, the connecting rod spacer, and the third pin, respectively, to transmit torque. This can prevent rust and adhesion at the connection between the shaft and the first deep groove ball bearing, the pusher bearing, the compression bearing, and the second deep groove ball bearing, and effectively improve the maintainability of the refrigeration unit. Attached Figure Description

[0026] Figure 1 This is a three-dimensional cross-sectional view of the present invention;

[0027] Figure 2 These are two views of the structure of the first deep groove ball bearing of this utility model;

[0028] Figure 3 These are two views of the structure of the second deep groove ball bearing of this utility model;

[0029] Figure 4 These are two views of the compression bearing structure of this utility model;

[0030] Figure 5 These are three views of the push bearing structure of this utility model;

[0031] Figure 6 These are two views of the connecting rod spacer structure of this utility model;

[0032] Figure 7 These are two views of the bearing spacer structure of this utility model.

[0033] In the diagram: 1. Rotor housing; 2. First deep groove ball bearing; 3. First pin; 4. Motor rotor; 5. Shaft; 6. Counterweight; 7. Second pin; 8. Third pin; 9. Push bearing; 10. Connecting rod spacer; 11. Compression bearing; 12. Bearing spacer; 13. Second deep groove ball bearing; 14. Large base; 15. First groove; 16. Second groove; 17. Protrusion; 18. Third groove. Detailed Implementation

[0034] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0035] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0036] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0038] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Example 1:

[0040] Please see Figures 1 to 7 This utility model provides a technical solution: a refrigeration rotor structure, comprising:

[0041] A large base assembly, wherein a rotor cover assembly is provided at the upper end of the large base assembly, and the interior of the large base assembly and the rotor cover assembly form a cavity;

[0042] A rotor assembly is disposed in the cavity. The rotor assembly includes a rotating shaft 5. A plurality of bearings are sleeved on the outer surface of the rotating shaft 5, and a connecting member is provided between at least one bearing and the rotating shaft 5. The at least one bearing is fixed to the rotating shaft 5 by the connecting member.

[0043] The rotor assembly is connected to each bearing through connectors, which axially fixes the rotor assembly to transmit torque, improving the start-up reliability of the refrigeration unit. At the same time, axial fixation through connectors to transmit torque can prevent rust and adhesion at the connection between the rotor assembly and the bearings.

[0044] Example 2:

[0045] like Figures 2-7 As shown, the refrigeration rotor structure and refrigeration machine disclosed in Embodiment 2 of this utility model are basically the same as those in Embodiment 1, except that:

[0046] The bearing includes a first deep groove ball bearing 2, a pusher bearing 9, and a second deep groove ball bearing 13. The rotor outer cover assembly and the large base assembly are rotatably connected to the rotating shaft 5 via the first deep groove ball bearing 2 and the second deep groove ball bearing 13, respectively. The pusher bearing is disposed on the eccentric portion of the rotating shaft. The first deep groove ball bearing 2, the pusher bearing 9, and the second deep groove ball bearing 13 are all fixed to the rotating shaft 5 by connecting parts.

[0047] The inner rings of the first deep groove ball bearing 2, the pusher bearing 9, and the second deep groove ball bearing 13 are all provided with a first groove 15;

[0048] The connecting component includes a first pin 3, a second pin 7, and a third pin 8. The first pin 3, the second pin 7, and the third pin 8 are respectively inserted into the first grooves 15 formed on the first deep groove ball bearing 2, the push bearing 9, and the second deep groove ball bearing 13, and are fixedly connected to the rotating shaft 5.

[0049] The large base assembly includes a large base 14, in which a first receiving groove is formed to accommodate a second deep groove ball bearing 13, and adhesive is applied between the second deep groove ball bearing 13 and the first receiving groove; the rotor outer cover assembly includes a rotor outer cover 1, in which a second receiving groove is formed to accommodate a first deep groove ball bearing 2, and adhesive is applied between the first deep groove ball bearing 2 and the second receiving groove.

[0050] The second deep groove ball bearing 13 is installed inside the large base 14 with glue, and then the rotor assembly is rotatably connected to the large base 14 through the cooperation of the third pin 8.

[0051] The bearing also includes a compression bearing 11, which is disposed on the eccentric portion of the rotating shaft and located between the push bearing 9 and the second deep groove ball bearing 13.

[0052] A connecting rod assembly is provided between the compression bearing 11 and the push bearing 9, and the compression bearing 11 and the push bearing 9 are connected by the connecting rod assembly;

[0053] The connecting rod assembly includes a connecting rod spacer 10, and the upper and lower end faces of the connecting rod spacer 10 are provided with a plurality of protrusions 17 distributed in a circular interval.

[0054] The compression bearing 11 and the push bearing 9 are each provided with a second groove 16 on one end face near each of the protrusions 17, which can accommodate each of the protrusions 17.

[0055] The connecting rod spacer 10 has an annular structure, and one end of the rotating shaft 5 passes through the connecting rod spacer 10 and is connected to the second deep groove ball bearing 13.

[0056] A bearing spacer 12 is provided between the compression bearing 11 and the second deep groove ball bearing 13. The bearing spacer 12 is sleeved on the rotating shaft 5, and a third groove 18 is provided on the bearing spacer 12. The bearing spacer 12 is fixedly connected to the rotating shaft 5 through the cooperation of the third groove 18 and the third pin 8.

[0057] The rotor assembly also includes a motor rotor 4, which is disposed on the outer side of one end of the rotating shaft 5 near the first deep groove ball bearing 2, and a counterweight 6 is also disposed on the outer surface of the rotating shaft 5, which is located between the motor rotor 4 and the push bearing 9.

[0058] The first deep groove ball bearing 2 is installed inside the rotor housing 1 using glue, and then the rotor assembly is rotatably connected to the rotor housing 1 by the first pin 3. At the same time, the rotor assembly is supported by the cooperation between the rotor housing 1 and the large base 14.

[0059] The second deep groove ball bearing 13 is installed inside the large base 14 using glue. Then, the bearing spacer 12 is placed on the second deep groove ball bearing 13, aligning the third groove 18 on the bearing spacer 12 with the first groove 15 on the second deep groove ball bearing 13. Next, the pusher bearing 9 is installed above the compression bearing 11 via the connecting rod spacer 10. The protrusion 17 of the connecting rod spacer engages with the grooves 16 of both the pusher bearing 9 and the compression bearing 11, allowing the pusher bearing 9 to rotate synchronously via the connecting rod spacer 10 and the compression bearing 11. After installation, one end of the rotating shaft 5 is passed through the connecting rod spacer 10 and inserted into the inside of the second deep groove ball bearing 13. At the same time, the rotating shaft 5 is connected to the second deep groove ball bearing 13 through the third pin 8, and the rotating shaft 5 is connected to the push bearing 9 through the second pin 7. Meanwhile, the rotor cover 1 is installed outside the rotating shaft 5. When installing the rotor cover 1, the first pin 3 at the end of the rotating shaft 5 will be inserted into the first groove 15 opened in the inner side wall of the first deep groove ball bearing 2, thus completing the connection between the first deep groove ball bearing 2 and the rotating shaft 5.

[0060] Specifically, during operation, the rotation of the rotating shaft 5 drives the first deep groove ball bearing 2 to rotate via the first pin 3. Simultaneously, through the cooperation of the second pin 7, the push bearing 9 rotates. Through the cooperation of the connecting rod spacer 10, the compression bearing 11 rotates. And through the third pin 8, the second deep groove ball bearing 13 rotates.

[0061] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0062] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A refrigeration rotor structure, characterized in that, include: A large base assembly, wherein a rotor cover assembly is provided at the upper end of the large base assembly, and the interior of the large base assembly and the rotor cover assembly form a cavity; A rotor assembly is disposed in the cavity. The rotor assembly includes a rotating shaft (5). A plurality of bearings are sleeved on the outer surface of the rotating shaft (5), and a connecting member is provided between at least one bearing and the rotating shaft (5). The at least one bearing is fixed on the rotating shaft (5) by the connecting member.

2. The refrigeration rotor structure according to claim 1, characterized in that, The bearings include a first deep groove ball bearing (2), a pusher bearing (9), and a second deep groove ball bearing (13). The rotor housing assembly and the large base assembly are rotatably connected to the rotating shaft (5) via the first deep groove ball bearing (2) and the second deep groove ball bearing (13), respectively. The pusher bearing is disposed on the eccentric portion of the rotating shaft. The first deep groove ball bearing (2), the pusher bearing (9), and the second deep groove ball bearing (13) are all fixed to the rotating shaft (5) by connecting members.

3. The refrigeration rotor structure according to claim 2, characterized in that, The inner rings of the first deep groove ball bearing (2), the pusher bearing (9), and the second deep groove ball bearing (13) are all provided with a first groove (15); The connector includes a first pin (3), a second pin (7), and a third pin (8). The first pin (3), the second pin (7), and the third pin (8) are respectively inserted into the first groove (15) opened on the first deep groove ball bearing (2), the push bearing (9), and the second deep groove ball bearing (13), and are fixedly connected to the rotating shaft (5).

4. The refrigeration rotor structure according to claim 2, characterized in that, The large base assembly includes a large base (14), the large base (14) having a first receiving groove for accommodating a second deep groove ball bearing (13), and adhesive being coated between the second deep groove ball bearing (13) and the first receiving groove; the rotor cover assembly includes a rotor cover (1), the rotor cover (1) having a second receiving groove for accommodating a first deep groove ball bearing (2), and adhesive being coated between the first deep groove ball bearing (2) and the second receiving groove.

5. The refrigeration rotor structure according to claim 2, characterized in that, The bearing also includes a compression bearing (11), which is disposed on the eccentric portion of the shaft and located between the push bearing (9) and the second deep groove ball bearing (13); A connecting rod assembly is provided between the compression bearing (11) and the push bearing (9), and the compression bearing (11) and the push bearing (9) are connected by the connecting rod assembly.

6. The refrigeration rotor structure according to claim 5, characterized in that, The connecting rod assembly includes a connecting rod spacer (10), and the upper and lower end faces of the connecting rod spacer (10) are provided with a plurality of protrusions (17) distributed in a circular interval. The compression bearing (11) and the push bearing (9) each have a second groove (16) on one end face near each of the protrusions (17) that can accommodate each of the protrusions (17).

7. The refrigeration rotor structure according to claim 6, characterized in that, The connecting rod spacer (10) has an annular structure, and one end of the rotating shaft (5) passes through the connecting rod spacer (10) and is connected to the second deep groove ball bearing (13).

8. The refrigeration rotor structure according to claim 5, characterized in that, A bearing spacer (12) is provided between the compression bearing (11) and the second deep groove ball bearing (13). The bearing spacer (12) is sleeved on the rotating shaft (5), and a third groove (18) is provided on the bearing spacer (12). The bearing spacer (12) is fixedly connected to the rotating shaft (5) through the cooperation of the third groove (18) and the third pin (8).

9. The refrigeration rotor structure according to claim 2, characterized in that, The rotor assembly also includes a motor rotor (4), which is disposed on the outside of one end of the shaft (5) near the first deep groove ball bearing (2), and a counterweight (6) is disposed on the outer surface of the shaft (5), which is located between the motor rotor (4) and the push bearing (9).

10. A refrigeration machine, characterized in that, The refrigerator rotor structure as described in any one of claims 1-9 further includes a compression assembly and a pushing assembly, wherein the compression assembly is connected to a compression bearing (11) and the pushing assembly is connected to a pushing bearing (9).

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