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A Spiral Ring Pretensioning Structure for Helicopter Molecular Sieve Bed Assembly
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A molecular sieve and helicopter technology, applied in the field of spiral ring pre-tensioning structure, can solve the problems of inconvenient assembly, reduce the oxygen concentration of finished products, affect the oxygen production effect, etc., achieve the effect of convenient installation and improve assembly efficiency
Active Publication Date: 2021-12-24
CHENGDU KANGTUO XINGYE TECH CO LTD
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Problems solved by technology
Moreover, the weight of the molecular sieve is relatively large, which is more than double the weight of the entire molecular sieve bed. Its movement will cause the entire molecular sieve oxygen generation system to vibrate, and the collision and wear between the molecular sieve particles will cause the particle size to become smaller and smaller. , when it is smaller than the pore size of the filter, it will be brought into the oxygen flow channel of the finished product by the flowing air flow, causing airborne personnel to inhale, causing great bodily injury, and the molecular sieve dust mixed into the finished oxygen will also reduce the oxygen concentration of the finished product, affecting the production Oxygen effect, the continuous reduction of molecular sieves reduces the service life of oxygen generators, and also brings huge economic losses
[0004] At present, there is no oxygen generation and supply system installed on helicopters in China, which uses the helicopter's own power supply. Some helicopters use two high-pressure oxygen cylinders and other oxygen supply methods, which have the problems of heavy weight, large volume, and high-voltage danger.
In addition, due to the influence and constraints of regular pressure testing of oxygen cylinders, oxygen filling after use, and the lack of special oxygen-generating equipment in remote areas, the shortcomings of using oxygen cylinders for oxygen supply are prominent
Through research and comparison, technologies such as molecular sieve oxygen generation were introduced into the helicopter, and the equipment composition was optimized according to the design requirements of the "six characteristics", and an oxygen generation and supply system for helicopters was designed to provide safe and reliable delivery to the transported personnel. and helicopter pilots; however, it is very inconvenient for the staff to assemble the molecular sieve bed assembly onboard the helicopter
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Embodiment 1
[0032] See attached Figure 1-Figure 3 , this embodiment discloses a spiral ring pretensioning structure for a helicopter molecular sieve bed assembly, including a sieve bed cover 101, a spiral ring 102 and a frock body 103, the sieve bed cover 101 is used to be installed on the sieve bed 104, After the spiral ring 102 is screwed to the sieve bed 104, the sieve bed cover plate 101 is fixed;
[0033] Wherein, the sieve bed 104 is provided with a stepped installation groove 105, the stepped installation groove 105 is provided with an internal thread, the spiral ring 102 is provided with an external thread, the sieve bed cover plate 101 is placed on the stepped surface 106 on the stepped installation groove 105, The spiral ring 102 is screwed in the stepped installation groove 105 through the internal thread and the external thread;
[0034] There are at least two pin holes uniformly distributed on the upper surface of the spiral ring 102 , and pins 107 are arranged on the posit...
Embodiment 2
[0037] This embodiment is further optimized on the basis of Embodiment 1. In this embodiment, the frock body 103 includes a connecting ring 108 and a connecting handle 109, the pin 107 is arranged on the connecting ring 108, and the connecting handle 109 It is fixedly arranged on the upper end of the connecting ring 108; the provided connecting handle 109 can form a twisting structure, which is convenient to realize the rotation of the connecting ring 108, and the operation is more convenient.
Embodiment 3
[0039] This embodiment is further optimized on the basis of the second embodiment. In this embodiment, the connection handle 109 and the connection ring 108 are in an integrated structure.
[0040]In some embodiments, the connecting handle 109 and the connecting ring 108 are fixedly connected together by welding.
[0041] In some embodiments, the connection handle 109 and the connection ring 108 are integrally formed by casting process.
[0042] In some embodiments, the tool body 103 is provided with a mounting hole, and the pin 107 is installed in the mounting hole through an interference fit; thus, in actual use, the pin 107 and the connecting ring 108 forms a whole, which can not only ensure the integrity of the tooling main body 103, but also facilitate the replacement of damaged pins 107.
[0043] In some embodiments, the pin 107 and the tool body 103 are treated with a heat treatment process, such as annealing and tempering, so as to eliminate the stress on the pin 107 ...
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Abstract
The invention discloses a spiral ring pretensioning structure for a helicopter molecular sieve bed assembly, comprising a sieve bed cover plate, a spiral ring and a frock body, the sieve bed cover plate is used to be installed on the sieve bed, the spiral ring and the sieve bed screw After connecting, fix the sieve bed cover plate; among them, the sieve bed is provided with a ladder installation groove, the ladder installation groove is provided with internal threads, and the spiral ring is provided with external threads, and the sieve bed cover plate is placed on the stepped surface of the ladder installation groove. On the top, the spiral ring is screwed in the stepped installation groove through the internal thread and the external thread. In actual use, the present invention has the advantages of high strength and uniform force, and at the same time can realize precise control of the pretightening force of the spiral ring, more accurate torque application, and can prevent excessive torque from damaging the spiral ring thread and causing the spiral ring to fail It is more convenient in actual use. While improving the assembly efficiency, the precise installation of the spiral ring is realized, and the pre-tightening force and loosening force of the spiral ring are precisely controlled to ensure the normal operation of the molecular sieve bed assembly.
Description
technical field [0001] The invention relates to the technical field of oxygen making equipment, in particular to a spiral ring pretensioning structure used for a helicopter molecular sieve bed assembly. Background technique [0002] At present, although pressure swing adsorption oxygen production technology is also adopted in medical oxygen production and household oxygen production, although the function and principle of oxygen production can meet the demand for oxygen consumption, many performances of its molecular sieve oxygen production system cannot meet the national military standards. Relevant requirements for environmental tests and reliability tests of airborne products (such as molecular sieve oxygen generation systems recorded in helicopters). [0003] The structural design of the molecular sieve bed has a great influence on the performance. The existing technology only makes a simple reaction volume based on the filling volume of the molecular sieve, and does not...
Claims
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Application Information
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