A stirling cryocooler assembly jig

Abstract

The utility model relates to a kind of stirling cryogenic engine assembly tool, comprising: pedestal, the pedestal is used to install the crankcase of stirling cryogenic engine;Press sleeve, the press sleeve is set on the rotor protection sleeve of crankcase;Compression assembly, the compression assembly is installed above pedestal;Rotary driver, the rotary driver is used to adjust screw ring, the inner wall connection of the connecting place of screw ring and crankcase;Wherein, the compression assembly passes through press sleeve and transmits driving force to rotor protection sleeve, makes rotor protection sleeve move towards crankcase, and make the C type sealing ring between rotor protection sleeve and crankcase be compressed. By compression assembly driving press sleeve to realize easily driving rotor protection sleeve to move, until the C type sealing ring between rotor protection sleeve and crankcase is extruded, so that the whole process is more labor-saving and convenient, and by rotary driver to realize the easy adjustment of screw ring, finally realize the convenient installation of crankcase and rotor protection sleeve.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a Stirling refrigeration machine assembly fixture. Background Technology

[0002] In the assembly of a Stirling refrigerator crankcase and rotor protective sleeve, the rotor protective sleeve is secured with a threaded ring to compress a C-type sealing ring and ensure a sealing effect. However, in actual operation, the C-type sealing ring cannot be fully compressed when tightening the threaded ring. This is because: firstly, the friction between the threaded ring and the rotor protective sleeve is relatively large, and the greater the compression force between the threaded ring and the rotor protective sleeve, the greater the friction; secondly, the threaded ring requires a large overall tightening torque, thus preventing the C-type sealing ring from being fully compressed when tightening the threaded ring, and failing to achieve the expected installation effect. Therefore, a Stirling refrigerator assembly fixture is proposed. Utility Model Content

[0003] This utility model provides a Stirling refrigerator assembly fixture to solve at least one of the above-mentioned technical problems.

[0004] A Stirling refrigerator assembly fixture, comprising:

[0005] A base for mounting the crankcase of the Stirling refrigeration unit;

[0006] A pressure sleeve, which is fitted onto the rotor protective sleeve of the crankcase;

[0007] A clamping assembly, which is mounted above the base;

[0008] A rotary actuator for adjusting a threaded ring, the threaded ring being connected to the inner wall of the crankcase connection.

[0009] The clamping assembly transmits driving force to the rotor protective sleeve through the pressure sleeve, causing the rotor protective sleeve to move toward the crankcase and compressing the C-shaped seal between the rotor protective sleeve and the crankcase.

[0010] In one embodiment, the clamping assembly includes a pressure plate and multiple sets of fasteners, each set of fasteners passing through the pressure plate. The lower part of each fastener is threadedly connected to the base, and adjusting the fasteners can move the pressure plate toward the base.

[0011] In one embodiment, the rotary actuator includes a sleeve and a plurality of handles, the plurality of handles being equally spaced along the circumference of the sleeve, and a collar being provided on the side of the sleeve near the base, the collar having a plurality of protrusions equally spaced along its circumference.

[0012] In one embodiment, the outer wall of the threaded ring is provided with an external thread that mates with the internal thread of the inner wall of the crankcase connection.

[0013] In one embodiment, the inner wall of the threaded ring is provided with a plurality of slots at equal intervals, and the number of slots is the same as the number of protrusions.

[0014] In one embodiment, the inner diameter of the sleeve is greater than or equal to the outer diameter of the pressure sleeve.

[0015] In one embodiment, the outer diameter of the collar is equal to or less than the inner diameter of the threaded ring, such that the protrusion can be embedded in the slot.

[0016] In one embodiment, the top of the base is provided with a plurality of locating pins and a plurality of mounting holes, both of which are used to mount the crankcase.

[0017] In one embodiment, the base is further provided with a fixing hole, in which a fixing element is installed to fix the position of the base.

[0018] In one embodiment, the height of the internal cavity of the pressure sleeve is greater than or equal to the height of the rotor protective sleeve.

[0019] Compared with the prior art, the advantages of this utility model are that the pressing component drives the pressing sleeve to easily move the rotor protective sleeve until the C-shaped sealing ring between the rotor protective sleeve and the crankcase is squeezed, making the whole process more labor-saving and convenient. Furthermore, the rotary drive enables easy adjustment of the threaded ring, ultimately achieving convenient installation of the crankcase and rotor protective sleeve. Attached Figure Description

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the Stirling refrigerator of this utility model;

[0022] Figure 2 This is an assembly diagram of the Stirling refrigerator of this utility model;

[0023] Figure 3 yes Figure 2 A sectional view;

[0024] Figure 4 This is a schematic diagram of the base of this utility model;

[0025] Figure 5 This is a schematic diagram of the pressure plate of this utility model;

[0026] Figure 6This is a schematic diagram of the rotary actuator of this utility model;

[0027] Figure 7 This is a schematic diagram of the pressure sleeve of this utility model;

[0028] Figure label:

[0029] 1. Base; 2. Pressure plate; 3. Fastener; 4. Fixing component; 5. Rotary actuator; 6. Pressure sleeve; 7. Crankcase; 8. C-type seal ring; 9. Rotor protective sleeve; 10. Threaded ring; 11. Sealing surface; 12. Slot; 13. Sleeve; 14. Collar; 15. Protrusion; 16. Handle; 17. Locating pin; 18. Mounting hole. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] from Figure 1 As can be seen, the compressor sealing surface 11 is fastened with multiple screws. The screw tightening force appropriately compresses and deforms the C-type sealing ring 8, relying on its own elastic force to make it tightly fit the compressor end cover and crankcase 7, ensuring the sealing effect of the compressor sealing surface 11. The structure of the expansion sealing cover 11 is similar to that of the compressor sealing surface 11. The motor surface seal is not fastened with screws, but with a threaded ring 10. The preload of the thread is used to compress and deform the C-type sealing ring 8 to ensure a seal. However, in actual operation, the preload formed by using only one threaded ring 10 is much smaller than that of multiple screws, making it difficult to preload the C-type sealing ring 8 into place. This results in the C-type sealing ring 8 not fitting properly with the rotor protective sleeve 9 and the sealing surface 11 of the crankcase 7, which can easily cause gas leakage. Therefore, this tooling can more easily compress the C-type sealing ring 8 into place and more easily install the threaded ring 10 to limit the rotor protective sleeve 9.

[0032] Please refer to Figure 1-3 and Figure 7 ,in, Figure 7 a is a three-dimensional view of the pressure sleeve. Figure 7 b is a sectional view of the pressure sleeve. Figure 7c is a top view of the pressure sleeve, illustrating a Stirling refrigerator assembly fixture, comprising: a base 1, a pressure sleeve 6, a clamping assembly, and a rotary actuator 5. The base 1 is used to mount the crankcase 7 of the Stirling refrigerator. The pressure sleeve 6 is fitted onto the rotor protective sleeve 9 of the crankcase 7. The rotor protective sleeve 9 includes a cylindrical portion and an annular abutment portion. The abutment portion is annularly disposed at one end of the cylindrical portion near the crankcase, and the inner diameter of the abutment portion is consistent with the inner diameter of the cylindrical portion. The bottom surface of the pressure sleeve 6 is in full contact with the top of the abutment portion of the rotor protective sleeve 9, ensuring the rotor is protected. The protective sleeve 9 is fitted onto the rotor body of the crankcase 7, thus enabling the rotor protective sleeve 9 to move as the pressure sleeve 6 moves towards the base 1. The clamping assembly is installed above the base 1. The rotary drive 5 is used to adjust the threaded ring 10, which is connected to the inner wall of the crankcase 7. The clamping assembly transmits driving force to the rotor protective sleeve 5 through the pressure sleeve 6, causing the rotor protective sleeve 5 to move towards the crankcase 7 and compressing the C-shaped seal between the rotor protective sleeve 5 and the crankcase 7. The bottom surface of the abutment portion of the rotor protective sleeve 5 includes a first sealing end face and a second sealing end face, which are concentric circles. The diameter of the first sealing end face is smaller than the diameter of the second sealing end face. After assembly, the first sealing end face and the sealing surface 11 of the crankcase 7 are in contact with each other. A C-shaped seal 8 is provided between the second sealing end face and the sealing surface 11 of the crankcase 7, and the C-shaped seal 8 is compressed to ensure the sealing effect between the rotor protective sleeve 5 and the crankcase 7. To ensure that the threaded ring 10 can press down on the rotor protective sleeve 9, the outer diameter of the end of the rotor protective sleeve 9 near the crankcase 7 is larger than the inner diameter of the threaded ring 10 and smaller than the diameter of the sealing surface 11 of the crankcase 7. That is, the outer diameter of the abutting part of the rotor protective sleeve 5 is larger than the inner diameter of the threaded ring 10 and smaller than the diameter of the sealing surface 11 of the crankcase 7, so that the threaded ring 10 can press down on the abutting part of the rotor protective sleeve 5 and limit the position of the rotor protective sleeve 5.

[0033] To better implement this utility model, refer to Figure 3 and Figure 5 In one embodiment, the clamping assembly includes a pressure plate 2 and multiple sets of fasteners 3, which pass through the pressure plate 2 respectively. The lower part of the fasteners 3 is connected to the base 1 by threads. Adjusting the fasteners 3 can drive the pressure plate 2 to move toward the base 1.

[0034] To better implement this utility model, refer to Figure 6 a, Figure 6 b and Figure 6 c. In one embodiment, the rotary actuator 5 includes a sleeve 13 and multiple handles 16. The multiple handles 16 are evenly spaced along the circumference of the sleeve 13. A collar 14 is provided on the side of the sleeve 13 near the base 1. Multiple protrusions 15 are evenly spaced along the circumference of the collar 14, such as... Figure 6 As shown in c. Figure 6Figure a is a perspective view of the rotary actuator 5. As shown in the figure, two handles 16 are symmetrically arranged on the outer periphery of the sleeve 13.

[0035] To better implement this utility model, refer to Figure 1 In one embodiment, the outer wall of the threaded ring 10 is provided with an external thread that engages with the internal thread of the inner wall of the crankcase 7. Multiple slots 12 are evenly spaced on the inner wall of the threaded ring 10, the number of slots 12 matching the number of protrusions 15. When the rotary actuator 5 drives the threaded ring 10 to rotate, the protrusions 15 on the rotary actuator 5 are inserted into the corresponding slots 12 on the threaded ring 10, allowing the operator to easily grip the handle 16 and rotate the sleeve 13, thereby rotating the threaded ring 10. The engagement of the external thread of the threaded ring 10 with the internal thread of the crankcase 7 enables the threaded ring 10 to move axially along the crankcase 7, thus defining the position of the threaded ring 10 after it has been pressed against the rotor protective sleeve 9. The outer diameter of the collar 14 is equal to or less than the inner diameter of the threaded ring 10, but it must be ensured that the protrusion 15 on the collar 14 can be embedded in the slot 12. That is to say, the length formed from the center of the collar 14 to the farthest end of the protrusion 15 must be greater than the inner diameter of the threaded ring 10 so that the protrusion 15 can be embedded in the slot 12.

[0036] To better implement this utility model, refer to Figure 2 , Figure 3 Figure 6 and Figure 7 The inner diameter of the sleeve 13 is greater than or equal to the outer diameter of the pressure sleeve 6. This ensures that after the pressure sleeve 6 is fitted onto the rotor protective sleeve 9, the sleeve 13 of the rotary actuator 5 can be fitted onto the outside of the pressure sleeve 6 without affecting the ability of the rotary actuator 5 to drive the threaded ring 10 to move further while pressing the pressure sleeve 6, so as to achieve the final installation.

[0037] To better implement this utility model, refer to Figure 4 a, Figure 4 b and Figure 4 c. In one embodiment, the top of the base 1 is provided with multiple locating pins 17 and multiple mounting holes 18, both of which are used to install the crankcase 7. Preferably, this embodiment provides two locating pins 17 and three mounting holes 18. These mounting holes 18, in conjunction with M2.5 screws, secure the crankcase 7 to be assembled onto the base 1. The locating pins 17 and the screws share the shearing force during tightening. The base 1 also has fixing holes, in which fasteners 4 are installed to fix the position of the base 1 and prevent it from moving during assembly. The fasteners 4 can be M6 screws. The base 1 is then installed and fixed using the fixing holes and M6 screws.

[0038] To better implement this utility model, refer to Figure 3In one embodiment, the height of the internal cavity of the pressure sleeve 6 is greater than or equal to the height of the rotor protective sleeve 9.

[0039] Example 1

[0040] In Example 1, the sealing surface 11 of the crankcase 7 (the surface that contacts the C-type sealing ring 8) and the bottom surface of the rotor protective sleeve 9 (the surface that contacts the C-type sealing ring 8) are first wiped clean with anhydrous ethanol using a cotton swab, and the reagent is dried with a nitrogen gun. The crankcase 7 is fixed on the base 1, and the base 1 is fixed on a stable platform. The C-type sealing ring 8 is fitted onto the sealing part of the crankcase 7. Then, the rotor protective sleeve 9 is placed on the crankcase 7, and the protrusion 15 of the rotary actuator 5 is embedded into the groove 12 of the threaded ring 10. By rotating the rotary actuator 5, the threaded ring 10 is rotated to a slightly stressed state. At this time, the rotor protective sleeve 9 is pressed down by the threaded ring 10, and both the rotor protective sleeve 9 and the C-type sealing ring 8 are initially constrained. The pressure sleeve 6 is fitted onto the rotor protective sleeve 9, so that the bottom of the pressure sleeve 6 is in full contact with the pressed surface of the rotor protective sleeve 9. The rotary actuator 5 is fitted onto the pressure sleeve 6, and the protrusion 15 of the rotary actuator 5 is embedded into the groove 12 of the threaded ring 10. In this embodiment, four sets of fasteners 3 are provided, respectively located at the four corners of the pressure plate 2. The fasteners 3 are M6 screws. By adjusting the fasteners 3, the external thread of the lower part of the fastener 3 engages with the internal thread of the threaded hole on the base 1, thereby moving the fastener 3 downward and driving the pressure plate 2 downward. The pressure plate 2 is installed on the base 1 by the four M6 screws. Tightening the M6 ​​screws moves the pressure plate 2 toward the base 1. The downward pressure of the pressure plate 2 will cause the pressure sleeve 6 to be stressed, driving the rotor protective sleeve 9 downward. The movement of the rotor protective sleeve 9 will compress the C-type sealing ring 8. When the first sealing end face of the rotor protective sleeve 9 contacts the crankcase 7, it means that the C-type sealing ring 8 has been compressed into place. At this time, the rotor protective sleeve 9 can no longer move downward. Rotating the rotary driver 5 drives the threaded ring 10 downward, and the threaded ring 10 fixes the rotor protective sleeve 9. Finally, the clamping assembly, rotary driver 5 and pressure sleeve 6 are removed in sequence, and the crankcase 7 is removed from the base 1, thus completing the assembly of the Stirling refrigeration unit.

[0041] Example 2

[0042] Setting the fastener 3 in Example 1 as a combination of screws and nuts can achieve the same effect as in Example 1. That is, four screws are fixed at the four corners of the base 1, the upper end of the screws passes through the pressure plate 2, and nuts are sleeved on the screws on the upper side of the pressure plate 2. Rotating the nuts can squeeze the pressure plate 2 downward, thereby generating downward pressure on the pressure sleeve 6 and the rotor protective sleeve 9 in sequence.

[0043] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A Stirling refrigerator assembly fixture, characterized in that, include: A base for mounting the crankcase of the Stirling refrigeration unit; A pressure sleeve, which is fitted onto the rotor protective sleeve of the crankcase; A clamping assembly, which is mounted above the base; A rotary actuator for adjusting a threaded ring, the threaded ring being connected to the inner wall of the crankcase connection. The clamping assembly transmits driving force to the rotor protective sleeve through the pressure sleeve, causing the rotor protective sleeve to move toward the crankcase and compressing the C-shaped seal between the rotor protective sleeve and the crankcase.

2. The Stirling refrigerator assembly fixture according to claim 1, characterized in that, The clamping assembly includes a pressure plate and multiple sets of fasteners. The multiple sets of fasteners pass through the pressure plate, and the lower part of the fasteners is threadedly connected to the base. Adjusting the fasteners can move the pressure plate toward the base.

3. The Stirling refrigerator assembly fixture according to claim 2, characterized in that, The rotary actuator includes a sleeve and multiple handles. The multiple handles are arranged at equal intervals along the circumference of the sleeve. The sleeve has a collar on the side near the base, and the collar has multiple protrusions arranged at equal intervals along its circumference.

4. The Stirling refrigerator assembly fixture according to claim 3, characterized in that, The outer wall of the threaded ring is provided with an external thread that mates with the internal thread of the inner wall of the connection point of the crankcase.

5. The Stirling refrigerator assembly fixture according to claim 3, characterized in that, The inner wall of the threaded ring is provided with multiple slots at equal intervals, and the number of slots is the same as the number of protrusions.

6. The Stirling refrigerator assembly fixture according to claim 3, characterized in that, The inner diameter of the sleeve is greater than or equal to the outer diameter of the pressure sleeve.

7. The Stirling refrigerator assembly fixture according to claim 5, characterized in that, The outer diameter of the collar is equal to or smaller than the inner diameter of the threaded ring, so that the protrusion can be embedded in the slot.

8. The Stirling refrigerator assembly fixture according to claim 5, characterized in that, The top of the base is provided with multiple positioning pins and multiple mounting holes, both of which are used to install the crankcase.

9. The Stirling refrigerator assembly fixture according to claim 6, characterized in that, The base is also provided with fixing holes, and fixing components are installed in the fixing holes to fix the position of the base.

10. The Stirling refrigerator assembly fixture according to claim 6, characterized in that, The height of the internal cavity of the pressure sleeve is greater than or equal to the height of the rotor protective sleeve.

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