An expander pusher assembly assembly effect detection device

Abstract

The utility model belongs to the technical field of expansion machine, specifically provides an expansion machine push -and -go subassembly assembly effect detection device, including expansion machine mounting seat, permanent magnet, permanent magnet support, coil, permanent magnet support is movably arranged between coil and expansion machine mounting seat, and permanent magnet with coil is coaxial arrangement, permanent magnet is installed on permanent magnet support, permanent magnet support is equipped with piston connection structure towards expansion machine mounting seat one side. The utility model provides this push -and -go subassembly assembly effect detection device can be installed in the outside of the assembled expansion machine component, through the energization of external coil, makes it cooperate with permanent magnet, drives the push -and -go subassembly of expansion machine to carry out reciprocating motion, can intuitively judge the assembly effect of push -and -go subassembly through the size of drive current.

Description

Technical Field

[0001] This utility model belongs to the field of expander technology, specifically relating to an expander pushing component assembly effect testing device. Background Technology

[0002] With the development of technology, linear Stirling refrigerators are increasingly widely used in civilian and military equipment such as infrared thermal imagers, infrared forward-looking and night vision devices, missile guidance, and space applications. The expander is the core component of the linear Stirling refrigerator, including the pusher assembly, Dewar, and expander base (not shown in the figure). The pusher assembly is the motion-related component of the expander, including the guide piston, guide cylinder, and accumulator. The quality of the pusher assembly assembly directly affects the lifespan and performance of the entire refrigerator. Currently, the assembly quality of the expander pusher assembly can only be judged subjectively, without objective data to reflect the quality of the assembly, resulting in low accuracy and unstable results. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of overly random, inaccurate, and unstable evaluation of the assembly effect of the expander pushing component in the prior art.

[0004] To address this, the present invention provides an expansion machine pushing assembly assembly effect testing device, comprising an expansion machine mounting base, a permanent magnet, a permanent magnet bracket, and a coil; the permanent magnet bracket is movably disposed between the coil and the expansion machine mounting base, and the permanent magnet is coaxially disposed with the coil; the permanent magnet is mounted on the permanent magnet bracket; the permanent magnet bracket is provided with a piston connection structure on the side facing the expansion machine mounting base.

[0005] Specifically, the above-mentioned expander pushing assembly assembly effect testing device also includes a housing; one end of the housing is provided with an opening; the coil is installed on the housing; the expander mounting base, permanent magnet, and permanent magnet bracket are installed inside the housing.

[0006] Specifically, a coil frame is mounted on the aforementioned housing; the coil is wound on the coil frame.

[0007] Specifically, the permanent magnet support is provided with a guide post at the end away from the piston connection structure; a guide channel is provided on the coil frame; and the guide post is movably inserted into the guide channel.

[0008] Specifically, the aforementioned permanent magnet support includes a first clamping plate and a second clamping plate arranged opposite to each other; the permanent magnet is clamped between the first clamping plate and the second clamping plate.

[0009] Specifically, the first clamping plate includes an integrally formed first permanent magnet clamping part and a first piston clamping part; the second clamping plate includes an integrally formed second permanent magnet clamping part and a second piston clamping part; the permanent magnet is clamped between the first permanent magnet clamping part and the second permanent magnet clamping part; the first piston clamping part and the second piston clamping part are used to clamp the guide piston.

[0010] Specifically, the aforementioned expander mounting base includes a support cylinder; the support cylinder has an opening.

[0011] Specifically, the aforementioned fasteners include screws; the support cylinder is provided with matching threaded holes; and the expander is connected to the support cylinder via screws and threaded holes.

[0012] Specifically, the aforementioned permanent magnet includes a magnetic steel; the magnetic steel is axially magnetized.

[0013] Specifically, the aforementioned expander pushing component assembly effect testing device also includes a power supply device; the power supply device is connected to the coil.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] The expansion machine pushing component assembly effect detection device provided by this utility model can be installed on the outside of the assembled expansion machine component. By energizing the external coil, it cooperates with the permanent magnet to drive the expansion machine pushing component to reciprocate. The assembly effect of the pushing component can be intuitively judged by the magnitude of the driving current.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a device for detecting the assembly effect of an expander pushing component in one implementation method.

[0018] Figure 2 This is a cross-sectional view of an expansion machine pushing component assembly effect detection device in one embodiment.

[0019] Explanation of reference numerals in the attached drawings: 1. Support cylinder; 2. Permanent magnet bracket; 201. First clamping plate; 202. Second clamping plate; 203. Guide column; 3. Magnet; 4. Coil; 5. Coil frame; 6. Shell; 7. Dewar; 8. Guide cylinder; 9. Guide piston; 10. Accumulator. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] Reference Figure 1-2 This utility model provides a device for testing the assembly effect of an expander pushing component, including an expander mounting base, a permanent magnet, a permanent magnet bracket 2, and a coil 4. The permanent magnet bracket 2 is movably disposed between the coil 4 and the expander mounting base, and the permanent magnet and the coil 4 are coaxially arranged. The permanent magnet is mounted on the permanent magnet bracket 2. The permanent magnet bracket 2 has a piston connection structure on the side facing the expander mounting base. During testing, the expander's Dewar 7 is mounted on the expander mounting base, and the guide piston 9 extends to one end of the guide cylinder 8 and connects to the piston connection structure on the permanent magnet bracket 2, ensuring that the coil 4, the permanent magnet, and the guide piston 9 are arranged coaxially. Optionally, the piston connection structure includes a first piston clamping part and a second piston clamping part disposed at one end of the permanent magnet bracket 2 away from the coil 4. The first piston clamping part and the second piston clamping part are arranged opposite to each other, forming a clamping space that matches the guide piston 9. The end of the guide piston 9 is clamped from both sides by the first piston clamping part and the second piston clamping part. It can be fixed by adhesive or welding to prevent it from falling off during movement.

[0024] After installation, AC current is applied to coil 4, causing it to repel and attract the permanent magnet. This drives the permanent magnet support 2 to move back and forth between coil 4 and the expander mounting base, which in turn drives the guide piston 9 and other pushing components to reciprocate. During the drive process, the magnitude of the drive current is adjusted to make the guide piston 9 and other pushing components reciprocate according to predetermined requirements. The drive current when the pushing components move according to predetermined requirements is the final drive current. At this point, the assembly effect of the pushing components can be directly expressed through the drive current. If the drive current is greater than the average value, it indicates that the assembly effect is poor and the assembly needs to be readjusted.

[0025] To reduce the impact of external factors on the test results, the expander pushing assembly assembly effect testing device also includes a housing 6; the coil 4 is mounted on the housing 6; the expander mounting base, permanent magnet, and permanent magnet support 2 are installed inside the housing 6. The housing 6 protects the internal test components and reduces external interference.

[0026] Furthermore, a coil frame 5 is mounted on the housing 6; the coil 4 is wound around the coil frame 5. The coil frame 5 provides support for the coil 4 and forms a sealed structure with the housing 6 to reduce external interference during the detection process.

[0027] Specifically, both the coil frame 5 and the housing 6 are provided with matching threaded holes; the coil frame 5 is connected to the housing 6 by screws and threaded holes.

[0028] In one embodiment, in order to facilitate the installation of the expander and the expander mounting base, an installation port can be provided at the bottom of the housing 6. After the expander, the expander mounting base and the permanent magnet bracket 2 are assembled, the housing 6 is fitted over the expander mounting base and other components through the bottom installation port.

[0029] To ensure stable axial reciprocating motion of the permanent magnet support 2, a guide post 203 is provided on the permanent magnet support 2; a guide channel is provided on the coil frame 5; the guide post 203 is movably inserted into the guide channel. Through the limiting effect of the guide channel and the guide post 203, the permanent magnet support 2 and the permanent magnet drive the guide piston 9 to reciprocate axially. Specifically, one end of the housing 6 has an opening, the coil frame 5 is installed at the open end of the housing 6, and the guide post 203 passes through the opening of the housing 6 and is inserted into the guide channel of the coil frame 5.

[0030] In one detailed embodiment, the permanent magnet support 2 includes a first clamping plate 201 and a second clamping plate 202 arranged opposite to each other; the permanent magnet is clamped between the first clamping plate 201 and the second clamping plate 202.

[0031] Specifically, the first clamping plate 201 includes an integrally formed first permanent magnet clamping part and a first piston clamping part; the second clamping plate 202 includes an integrally formed second permanent magnet clamping part and a second piston clamping part; the permanent magnet is clamped between the first permanent magnet clamping part and the second permanent magnet clamping part; the first piston clamping part and the second piston clamping part form a piston connection structure for clamping the guide piston 9. The first permanent magnet clamping part and the second permanent magnet clamping part are connected by screws or other feasible means. This ensures that after the first clamping plate 201 and the second clamping plate 202 are connected, the area formed between them can simultaneously clamp the permanent magnet and the guide piston 9.

[0032] When the first permanent magnet clamping part and the second permanent magnet clamping part are connected by screws, the end of the first permanent magnet clamping part away from the piston connecting structure extends towards the second permanent magnet clamping part to form a first fixing part, and the end of the second permanent magnet clamping part away from the piston connecting structure extends towards the first permanent magnet clamping part to form a second fixing part, such that the distance between the first fixing part and the second fixing part is less than the distance between the first permanent magnet clamping part and the second permanent magnet clamping part. Both the first fixing part and the second fixing part are provided with threaded holes. After the first fixing part and the second fixing part are connected by screws and threaded holes, a clamping space matching the permanent magnet is formed between the first permanent magnet clamping part and the second permanent magnet clamping part.

[0033] Furthermore, the guide post 203 may include a first guide block and a second guide block. The first guide block and the second guide block are respectively connected to the first permanent magnet clamping part and the second permanent magnet clamping part. When the first permanent magnet clamping part and the second permanent magnet clamping part are connected by screws, the first guide block and the second guide block are connected to form the guide post 203.

[0034] In another embodiment, the expander mounting base includes a support cylinder 1; the opening of the support cylinder 1 is provided with a fixing member for fixing the expander, and the support cylinder 1 has a receiving cavity for accommodating the various structures of the expander. In use, the expander's Dewar 7 is mounted on the support cylinder 1 by the fixing member, and the expander's guide cylinder 8, accumulator 10, and other components are located inside the support cylinder 1 to prevent the reciprocating motion of the pushing assembly from shifting and affecting the detection effect.

[0035] Optionally, the fasteners include screws; the support cylinder 1 is provided with matching threaded holes; the expander is connected to the support cylinder 1 via screws and threaded holes.

[0036] Preferably, the permanent magnet includes a magnet 3; the magnet 3 is axially magnetized.

[0037] Furthermore, the expander pushing assembly assembly effect detection device also includes a power supply device; the power supply device is connected to the coil 4. Alternating current is provided to the coil 4 through the power supply device.

[0038] Example 1:

[0039] This embodiment provides an expansion machine pushing component assembly effect testing device, including a support cylinder 1, a permanent magnet, a permanent magnet bracket 2, a coil 4, a coil frame 5, and a housing 6;

[0040] The housing 6 has an opening at the top and a mounting port at the bottom; both the coil frame 5 and the housing 6 have matching threaded holes; the coil frame 5 is installed at the opening of the housing 6 by screws and threaded holes; the coil 4 is wound on the coil frame 5; the coil frame 5 has a guide channel.

[0041] The support cylinder 1, permanent magnet, and permanent magnet bracket 2 are installed inside the housing 6;

[0042] The support cylinder 1 has a cavity for accommodating the various structures of the expander, and the open end of the support cylinder 1 is provided with a threaded hole for connecting to the expander.

[0043] The permanent magnet includes a magnet 3; the magnet 3 is axially magnetized;

[0044] The permanent magnet support 2 is disposed between the coil 4 and the expander mounting port of the support cylinder 1; the permanent magnet support 2 includes a guide post 203 and a clamping assembly; the guide post 203 is mounted above the clamping assembly; the clamping assembly includes a first clamping plate 201 and a second clamping plate 202 arranged opposite to each other; the first clamping plate 201 includes an integrally formed first permanent magnet clamping part and a first piston clamping part; the second clamping plate 202 includes an integrally formed second permanent magnet clamping part and a second piston clamping part; the first permanent magnet clamping part and the second permanent magnet clamping part are connected by screws; the magnet 3 is clamped between the first permanent magnet clamping part and the second permanent magnet clamping part; a piston connection structure for clamping the guide piston 9 is formed between the first piston clamping part and the second piston clamping part; the guide post 203 is movably inserted into the guide channel of the coil frame 5;

[0045] The coil 4, magnet 3, and expander mounting port are coaxially arranged.

[0046] During testing, the coil frame 5 is mounted on the housing 6 using screws and threaded holes, and the coil 4 is wound around the coil frame 5. The expander's Dewar 7 is mounted at the opening of the support cylinder 1 using screws. The expander's guide cylinder 8, accumulator 10, and other components are located inside the support cylinder 1. One end of the guide piston 9 extends to the guide cylinder 8 and is clamped between the first and second piston clamping parts of the permanent magnet bracket 2. The housing 6 is fitted over the permanent magnet bracket 2, support cylinder 1, and expander through the bottom mounting port. The guide post 203 of the permanent magnet bracket 2 is inserted into the wire channel of the coil frame 5, ensuring that the coil 4, magnet 3, and guide piston 9 are coaxially arranged. Alternating current is applied to the coil 4, causing it to repel and attract the permanent magnet. The permanent magnet bracket 2 drives the guide piston 9 and other pushing components to reciprocate. The assembly effect of the pushing components can be visually observed through the driving current. If the driving current is greater than the average value, it indicates a poor assembly effect, requiring readjustment.

[0047] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A device for detecting the assembly effect of an expander pushing component, characterized in that: It includes an expander mounting base, a permanent magnet, a permanent magnet bracket (2), and a coil (4); the permanent magnet bracket (2) is movably disposed between the coil (4) and the expander mounting base, and the permanent magnet is coaxially disposed with the coil (4); the permanent magnet is mounted on the permanent magnet bracket (2); the permanent magnet bracket (2) is provided with a piston connection structure on the side facing the expander mounting base.

2. The expander pushing assembly assembly effect detection device as described in claim 1, characterized in that: It also includes a housing (6); the coil (4) is mounted on the housing (6); the expander mounting base, permanent magnet, and permanent magnet bracket (2) are mounted inside the housing (6).

3. The expansion machine pushing assembly assembly effect detection device as described in claim 2, characterized in that: A coil frame (5) is mounted on the housing (6); the coil (4) is wound on the coil frame (5).

4. The expansion machine pushing assembly assembly effect detection device as described in claim 3, characterized in that: The permanent magnet support (2) has a guide post (203) at the end away from the piston connection structure; the coil frame (5) has a guide channel; the guide post (203) is movably inserted into the guide channel.

5. The expander pushing assembly assembly effect detection device as described in claim 1, characterized in that: The permanent magnet support (2) includes a first clamping plate (201) and a second clamping plate (202) arranged opposite to each other; the permanent magnet is clamped between the first clamping plate (201) and the second clamping plate (202).

6. The expander pushing assembly assembly effect detection device as described in claim 5, characterized in that: The first clamping plate (201) includes an integrally formed first permanent magnet clamping part and a first piston clamping part; the second clamping plate (202) includes an integrally formed second permanent magnet clamping part and a second piston clamping part; the permanent magnet is clamped between the first permanent magnet clamping part and the second permanent magnet clamping part; the first piston clamping part and the second piston clamping part are used to clamp the guide piston (9).

7. The expander pushing assembly assembly effect detection device as described in claim 1, characterized in that: The expander mounting base includes a support cylinder (1); the opening of the support cylinder (1) is provided with a fixing component for fixing the expander.

8. The expander pushing assembly assembly effect detection device as described in claim 7, characterized in that: The fastener includes screws; the support cylinder (1) is provided with threaded holes; the expander is connected to the support cylinder (1) through screws and threaded holes.

9. The expansion machine pushing assembly assembly effect detection device as described in claim 1, characterized in that: The permanent magnet includes a magnet (3); the magnet (3) is axially magnetized.

10. The expansion machine pushing assembly assembly effect detection device as described in claim 1, characterized in that: It also includes a power supply device; the power supply device is connected to the coil (4).

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