CN110142546B - Corrugated pipe type J-T refrigerator self-adjusting mechanism assembling clamp using diaphragm spring - Google Patents
Corrugated pipe type J-T refrigerator self-adjusting mechanism assembling clamp using diaphragm spring Download PDFInfo
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- CN110142546B CN110142546B CN201910401797.9A CN201910401797A CN110142546B CN 110142546 B CN110142546 B CN 110142546B CN 201910401797 A CN201910401797 A CN 201910401797A CN 110142546 B CN110142546 B CN 110142546B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Butt Welding And Welding Of Specific Article (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The invention discloses an assembly fixture of a corrugated pipe type J-T refrigerator self-adjusting mechanism by using a diaphragm spring, which comprises: reinforcing ring and diaphragm spring welding jig, including central locating pin and first base, wherein, first base is used for fixed reinforcing ring, and the axiality of reinforcing ring and diaphragm spring is guaranteed to the fit tolerance of central locating pin and base. The invention can meet the coaxiality requirement of the assembly of the self-adjusting mechanism of the refrigerator, the assembly parameters of the self-adjusting mechanism can be adjusted, the parameters can be adjusted in time and also can be solidified, the welding is convenient, and the small-batch production requirement of hundreds sets of refrigerators produced in the monthly period can be met.
Description
Technical Field
The invention relates to the field of low-temperature refrigeration, in particular to an assembly fixture for a self-adjusting mechanism of a bellows type J-T refrigerator using a diaphragm spring.
Background
In recent years, with the wide application of infrared technology in the fields of infrared imaging and reconnaissance and alarm, the technology of infrared focal plane detectors is rapidly developed. The J-T refrigerator is used as an important component of an infrared detector Dewar refrigeration assembly (IDDCA assembly), and mainly has the functions of cooling the infrared detector, providing a low-temperature working environment for the infrared detector, reducing the noise of the infrared detector, improving the sensitivity and resolution of the infrared detector and further improving the infrared imaging effect.
Second generation focal plane detector assemblies commonly employ self-adjusting chillers. Self-adjusting chillers typically employ bellows as the regulating element, automatically regulating the flow rate in response to fluctuations in the temperature of the component being cooled. The bellows type self-adjusting J-T refrigerator is filled with working medium gas with certain pressure in the gas charging cavity, and the bellows is in a compressed state. In the working process, high-pressure gas enters the refrigerator from the pipeline gas inlet and reaches the throttling hole through the heat exchange tube, the volume of the high-pressure gas is rapidly expanded after the high-pressure gas passes through the small hole, the pressure is rapidly reduced, the gas after pressure drop is greatly cooled according to the Joule-Thomson effect principle, the detector chip is cooled, and then the gas is discharged through the external gap of the heat exchanger. Meanwhile, the gas in the inflation cavity is rapidly cooled and even liquefied to reduce the pressure of the inflation cavity, so that the balance of the initial compression state of the corrugated pipe is broken, the corrugated pipe does extension movement to drive the transmission mechanism to move towards the tail of the refrigerator, the needle point of the valve needle extends into the throttling hole, and the throttling hole is reduced or even closed, so that the consumption of the gas is controlled. When the temperature rises, the gas pressure in the inflation cavity rises, the corrugated pipe is compressed, the valve needle moves out of the throttle hole, and the throttle hole is opened. The corrugated pipe type self-regulating J-T refrigerator is one capable of realizing self-regulation of refrigerating temperature, refrigerating flow and refrigerating power.
The self-adjusting mechanism of the J-T refrigerator is the only moving part of the refrigerator, which directly influences the performance index and the environmental adaptability of the refrigerator, and the assembly of the self-adjusting mechanism is the core process of the J-T refrigerator. The self-adjusting mechanism of the high-reliability J-T refrigerator with the diaphragm spring has complex assembly process and high precision requirement, the reservation quantity of the refrigerator and the ultimate stretching quantity of the diaphragm spring are ensured to be in accordance with the design values in the assembly process, and the assembly of all parts at the coaxiality is ensured.
Disclosure of Invention
The embodiment of the invention provides an assembly fixture of a self-adjusting mechanism of a bellows type J-T refrigerator by using a diaphragm spring, which is used for solving the problems in the prior art.
The embodiment of the invention provides an assembly fixture for a self-adjusting mechanism of a bellows type J-T refrigerator using a diaphragm spring, which comprises: reinforcing ring and diaphragm spring welding jig, including central locating pin and first base, wherein, first base is used for fixed reinforcing ring, and the axiality of reinforcing ring and diaphragm spring is guaranteed to the fit tolerance of central locating pin and base.
Preferably, the apparatus further comprises:
reinforcing ring and bellows welding jig, including second base and set screw, wherein, the second base is used for fixed reinforcing ring, and set screw compresses tightly the bellows, relies on the tolerance assurance bellows and the reinforcing ring welding axiality of set screw and base.
Preferably, the apparatus further comprises:
reserve volume adjustment fixture, including first base, first gland nut and first adjusting screw, wherein, first base bottom is provided with many scale marks evenly distributed, and first gland nut compresses tightly reinforcing ring and bellows and transfer line part as an organic whole of welding, and first adjusting screw terminal surface is provided with the scale mark, and the rotatory round of screw is the pitch value, and every check scale mark precision divides with the scale mark number for the pitch, guarantees the reserve volume value through the rotatory pitch of screw, and the reserve volume can be adjusted.
Preferably, the apparatus further comprises:
bellows and transfer line welding jig, including third base and housing screw, wherein, the third base is used for fixed allowance adjustment fixture, housing screw sets up in part upper portion, through third base and housing screw guarantee that the part is coaxial and compress tightly.
Preferably, the apparatus further comprises:
diaphragm spring and transfer line regulation, welding jig include: the second base, second adjusting screw, and second gland nut, guarantee the axiality of part by second base and second adjusting screw cooperation tolerance, there is the screw thread second base upper end, with gland nut cooperation, the lower terminal surface is provided with many scale mark equipartitions, adjusting screw is provided with many scale marks, the screw round of turning is the pitch value, the scale mark precision is pitch divided by the scale mark number, the screw is rotatory at the base lower extreme, guarantee the value of design value l, second gland nut is used for compressing tightly the part, wherein, l is the distance that keeps between transfer line shelves ring position and the reinforcing ring, l is the tensile spacing of another direction of diaphragm spring promptly.
By adopting the embodiment of the invention, the coaxiality requirement of the assembly of the self-adjusting mechanism of the refrigerator can be met, the assembly parameters of the self-adjusting mechanism can be adjusted, the parameters can be adjusted in time and can be solidified, the welding is convenient, and the small-batch production requirement of hundreds of sets of refrigerators produced in the month can be met.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic view of a stiffening ring and diaphragm spring weld fixture of an embodiment of the present invention;
FIG. 2 is a schematic view of a bellows and reinforcement ring welding fixture of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a self-adjusting mechanism reserve adjustment fixture of an embodiment of the invention;
FIG. 4 is a schematic diagram of a bottom view of an adjustment fixture of an embodiment of the present invention;
FIG. 5 is a schematic view of a bellows and drive link welding fixture of an embodiment of the present invention;
FIG. 6 is a schematic view of a diaphragm spring and drive link adjustment weld fixture according to an embodiment of the present invention.
Detailed Description
The diaphragm spring is used for positioning the transmission mechanism, so that the working reliability of the refrigerator can be improved. The self-adjusting mechanism of the high-reliability corrugated pipe type J-T refrigerator comprises a reinforcing ring, a diaphragm spring, a transmission rod and a corrugated pipe. In the assembly process of the self-adjusting mechanism, the parameters of the refrigerator are ensured to meet the design values, the coaxiality and other requirements of parts in the assembly process are also ensured, and a special clamp is required for each step of assembly operation of the self-adjusting mechanism of the refrigerator. The invention designs a set of assembly fixture of the self-adjusting mechanism, which ensures the assembly coaxiality of the self-adjusting mechanism, simultaneously, the two process parameters of the reserve amount and the limiting limit of the diaphragm spring in the assembly process are adjustable, and the design values of the process parameters can be met in time.
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the assembling process, the coaxiality of all parts needs to be ensured, the reserved quantity of the self-adjusting mechanism is ensured to accord with a design value, and the stretching limit of the diaphragm spring is ensured. The assembly steps are as follows:
a) the diaphragm spring is welded with the reinforcing ring, the design value of the height of the welding step of the diaphragm spring of the reinforcing ring is the maximum stretching value of the diaphragm spring, and stretching limit of the diaphragm spring in one direction can be ensured after welding.
b) And ensuring the design value of the reserved amount L, installing the transmission rod and the corrugated pipe into the reinforcing ring, welding the corrugated pipe and the reinforcing ring, and welding the thin end of the corrugated pipe and the transmission rod after ensuring the value of the reserved amount L.
c) The distance between the transmission rod baffle ring and the reinforcing ring is used for ensuring the stretching limit of the diaphragm spring in the other direction, and simultaneously ensuring that the acting force of the diaphragm spring on the transmission rod is consistent with the corrugated pipe in the working process of the refrigerator. A certain distance l is reserved between the transmission rod baffle ring and the reinforcing ring, a central hole of the diaphragm spring and the transmission rod are welded, after the refrigerator inflation cavity is inflated, the transmission rod moves upwards, the transmission rod baffle ring supports against the reinforcing ring, l is 0, and l is stretching limiting in the other direction of the diaphragm spring. At the moment, the diaphragm spring is in a convex state, and the acting force on the transmission rod is consistent with that of the corrugated pipe.
The coaxiality and technological parameters of all the technological steps are ensured by virtue of a clamp, and the specific assembling steps and the clamp are as follows:
a) the welding clamp for the reinforcing ring and the diaphragm spring comprises: the reinforcing ring and the diaphragm spring are assembled coaxially, and the welding fixture ensures the coaxiality of the reinforcing ring and the diaphragm spring by means of the fit tolerance of the central positioning pin and the base as shown in figure 1. The main consideration is to control the coaxial of the reinforcing ring and the diaphragm spring, and the material is stainless steel or other materials.
b) Reinforcing ring and bellows welding jig: the welding fixture is shown in fig. 2, and the welding coaxiality of the corrugated pipe and the reinforcing ring is ensured by means of the tolerance of the positioning screw and the base, and meanwhile, the positioning screw presses the corrugated pipe to facilitate the welding operation. The coaxial control of the reinforcing ring and the corrugated pipe is mainly considered, and the welding operation is convenient. The material is stainless steel or other materials.
c) The reserved amount adjusting clamp: the clamp is shown in figure 3, 20 (or other numerical values) scale marks are uniformly distributed at the bottom of the base, the compression nut compresses the component, the end face of the adjusting screw is provided with the scale marks, one circle of rotation of the screw is a screw pitch value, the precision of each grid of the scale marks is the screw pitch divided by the number of the scale marks, the bottom view of the clamp is shown in figure 4, the screw pitch is rotated by the screw to ensure a reserved quantity value, and the reserved quantity is adjustable. And considering the coaxial control of the parts, and adjusting the reserved quantity by depending on the thread pitch to ensure that the reserved quantity meets the design value. The clamp can be fixed after the reserved quantity is adjusted once, and the position of the adjusting screw can be adjusted again when the design value of the reserved quantity is changed. The material is stainless steel or other.
d) Bellows and transfer line welding jig: the reserve adjustment fixture is installed into the bellows and transmission rod welding fixture, as shown in fig. 5, the base and the compression screw are used to ensure the parts to be coaxial, and the compression is helpful for welding the parts. The coaxial control of parts is mainly considered, the welding operation is convenient, and the materials are stainless steel or other materials.
e) The diaphragm spring and the transmission rod are adjusted and welded: as shown in fig. 6, the device consists of a base, an adjusting screw and a compression nut. The coaxiality of the parts is guaranteed through the matching tolerance of the base and the adjusting screw, the upper end of the base is threaded and is matched with the compression nut, twenty (or other numerical) scale marks are uniformly distributed on the lower end face, the adjusting screw is provided with two scale marks, the screw turns to be a pitch value, the precision of the twenty (or other numerical) scale marks is divided by the number of the scale marks, and the screw rotates at the lower end of the base to guarantee the value of a design value l. The bottom view of the clamp is shown in fig. 4. The compression nut is used for compression, and is beneficial to fixing and welding the components. And the coaxial control of the parts is considered, so that the welding operation is convenient. The design value l is ensured by means of thread pitch adjustment. After once adjustment, the clamp can be fixed, and the position of the adjusting screw can be readjusted when the value of l changes. The material is stainless steel or other materials.
The embodiment of the invention has the following beneficial effects:
the whole set of self-adjusting mechanism assembling and welding fixture provided by the embodiment of the invention can meet the coaxiality requirement of the self-adjusting mechanism assembling of a refrigerator, the assembling parameters of the self-adjusting mechanism can be adjusted, and the parameters can be adjusted in time and also can be solidified.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A corrugated pipe type J-T refrigerator self-adjusting mechanism assembling clamp using a diaphragm spring is characterized by comprising the following components:
the welding fixture for the reinforcing ring and the diaphragm spring comprises a central positioning pin and a first base, wherein the first base is used for fixing the reinforcing ring, and the coaxiality of the reinforcing ring and the diaphragm spring is ensured by the matching tolerance of the central positioning pin and the first base;
the welding fixture for the reinforcing ring and the corrugated pipe comprises a second base and a positioning screw, wherein the second base is used for fixing the reinforcing ring, the corrugated pipe is pressed by the positioning screw, and the welding coaxiality of the corrugated pipe and the reinforcing ring is ensured by means of the tolerance of the positioning screw and the second base;
the reserved quantity adjusting clamp comprises a first base, a first compression nut and a first adjusting screw, wherein a plurality of scale marks are uniformly distributed at the bottom of the first base, the first compression nut is compressed and welded into an integral reinforcing ring, a corrugated pipe and a transmission rod part, the scale marks are arranged on the end face of the first adjusting screw, one rotation circle of the first adjusting screw is a screw pitch value, the precision of each grid of the scale marks is the screw pitch divided by the number of the scale marks, a reserved quantity value is ensured by the screw rotation screw pitch, and the reserved quantity can be adjusted;
the corrugated pipe and transmission rod welding clamp comprises a third base and a compression screw, wherein the third base is used for fixing a reserve adjusting clamp, the compression screw is arranged at the upper part of a part, and the third base and the compression screw are used for ensuring the part to be coaxial and compressed;
diaphragm spring and transfer line regulation, welding jig include: the second base, second adjusting screw, and second gland nut, guarantee the axiality of part by second base and second adjusting screw cooperation tolerance, there is the screw thread second base upper end, with the cooperation of second gland nut, the terminal surface is provided with many scale marks of equipartition down, second adjusting screw is provided with many scale marks, second adjusting screw turns round to be the pitch value, the scale mark precision is pitch divided by the scale mark number, second adjusting screw is rotatory at second base lower extreme, guarantee the value of design value l, second gland nut is used for compressing tightly the part, wherein, l is the distance that remains between transfer line shelves ring position and the reinforcing ring, l is the tensile spacing of another direction of diaphragm spring promptly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910401797.9A CN110142546B (en) | 2019-05-15 | 2019-05-15 | Corrugated pipe type J-T refrigerator self-adjusting mechanism assembling clamp using diaphragm spring |
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| CN201910401797.9A CN110142546B (en) | 2019-05-15 | 2019-05-15 | Corrugated pipe type J-T refrigerator self-adjusting mechanism assembling clamp using diaphragm spring |
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| CN110142546A CN110142546A (en) | 2019-08-20 |
| CN110142546B true CN110142546B (en) | 2021-04-30 |
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| CN113649790B (en) * | 2021-07-05 | 2022-10-25 | 中国电子科技集团公司第十一研究所 | Method for setting prepressing amount of corrugated pipe |
| CN113523636B (en) * | 2021-08-09 | 2022-05-31 | 江苏神通阀门股份有限公司 | Valve welding method |
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| FR2176544B1 (en) * | 1972-03-23 | 1982-02-19 | Air Liquide | |
| JP4784852B2 (en) * | 2005-01-12 | 2011-10-05 | 住友電気工業株式会社 | Cryogenic container for superconducting equipment |
| CN2913968Y (en) * | 2006-01-17 | 2007-06-20 | 浙江大学 | Bellows joint apparatus for coupling thermoacoustic engine and vessel refrigerator |
| CN101063559B (en) * | 2006-04-28 | 2010-06-09 | 北京中航空港通用设备有限公司 | Line focusing metal flow passage solar vacuum heat-collecting tube and fabrication technology thereof |
| CN201979241U (en) * | 2011-01-30 | 2011-09-21 | 大连奥托股份有限公司 | Floated positioning pin mechanism |
| CN206123005U (en) * | 2016-10-21 | 2017-04-26 | 中国重汽集团柳州运力专用汽车有限公司 | Location tool for welding |
| CN106766315B (en) * | 2016-11-16 | 2019-06-14 | 昆明物理研究所 | There are two the inferior throttling refrigerators of miniature Han Consulting of throttle orifice for a kind of tool |
| CN206519692U (en) * | 2017-02-23 | 2017-09-26 | 希姆斯电梯(中国)有限公司 | It is a kind of to be used for positioning and the spacing frock of support bar and mounting ring |
| CN108922725B (en) * | 2018-08-16 | 2020-05-15 | 西南交通大学 | Nitrogen fixation low-temperature container for bearing superconducting magnet |
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