High temperature and high pressure sealing window used for constant volume combustion bomb

A technology of constant volume incendiary bombs, high temperature and high pressure, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as poor sealing of fixed volume incendiary bomb windows, easy crushing of glass, sealing failure, etc., and easy to solve. The effect of crushing, disassembly and assembly is convenient, and the sealing performance is good.

Inactive Publication Date: 2013-08-28
TIANJIN UNIV
5 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The invention aims to solve the technical problems of poor sealing and easy breakage of the existing constant volume incendiary bomb window, and provides a high temperature and high pressure sealing window for constant volume incendiary bombs. As a whole, the flange end cover and the projectile body are sealed, and the glass is installed at one ...
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Method used

Back-up ring 6 is installed at the second sealing step surface 1-3 position place of flange end cover 1, and back-up ring 6 is axially limited by second sealing step surface 1-3; Back-up ring 6 internal diameters are less than quartz glass simultaneously 4, so that it is limited by the inner side of the quartz glass 4. The retaining ring 6 is made of No. 45 steel, with a surface roughness of 3.2 μm, and six bolt holes are evenly distributed, and is fixed on the flange end cover 1 with M6 inner hexagon socket head countersunk head bolts 5 . Countersunk head bolts 5 sink into retaining ring 6, and retaining ring 6 does not protrude from sealing surface 9 inside flange end cover 1, preventing installation pretightening force between flange end cover 1 and elastic body 10 from passing through retaining ring 6 Act on the quartz glass 4, thereby avoiding the crushing of the quartz glass 4 due to excessive force.
Step 5: the sealing surface 9 of flange end cover 1 inboard is coated with high-temperature sealing red glue, and the sealing window assembled above is installed on the body 10 by M10 high-strength mounting bolts, and adopts symmetrical order when tightening mounting bolts , so that the sealing window is evenly stressed. There is a gap of 1-2 mm between the inner side of the outer boss 1-1 of the flange end cover 1 and the elastic body 10, so that the pre-tightening force of the bolts pressing the flange end cover 1 all acts on the inner side of the flange end cover 1 On the sealing surface 9, the sealing effect of the sealing surface 9 is better due to concentrated force.
[0031] The quartz glass 4 is installed from the inside of the flange end cover 1, and its outside is axially limited by the first sealing step...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a high temperature and high pressure sealing window used for a constant volume combustion bomb. The high temperature and high pressure sealing window used for the constant volume combustion bomb comprises a flange end cover, wherein the external side of the flange end cover is provided with an external boss; the flange end cover and a constant volume combustion bomb body are fixed through installing bolts; glass is arranged inside the flange end cover; the external side of the glass is axially limited through a first sealing step surface which is arranged inside the flange end cover; the first sealing step surface is provided with a groove which is provided with an O type ring; the inner side of the glass is axially limited through a blocking ring which is fixed on a second sealing step surface which is arranged inside the flange end cover through countersunk bolts to compress the glass; and a graphite gasket is arranged between the blocking ring and the glass. According to the high temperature and high pressure sealing window used for the constant volume combustion bomb, the sealing is performed on the flange end cover and the constant volume combustion bomb body after the glass and the flange end cover are arranged into a whole, the glass is one-time installed, and frequent detachment is not needed, so that the problems that the sealing fails and the glass is easy to crush are solved. The gas expansion pressure inside a chamber enables pre-tightening force for compressing the glass to be enhanced to achieve the effect of self-tight sealing, so that the sealing of the high temperature and high pressure gas of the constant volume combustion bomb is achieved.

Application Domain

Technology Topic

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  • High temperature and high pressure sealing window used for constant volume combustion bomb
  • High temperature and high pressure sealing window used for constant volume combustion bomb
  • High temperature and high pressure sealing window used for constant volume combustion bomb

Examples

  • Experimental program(1)

Example Embodiment

[0027] The present invention will be further described in detail below through specific embodiments. The following embodiments may enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any way.
[0028] Such as figure 1 with figure 2 As shown, this embodiment discloses a high-temperature and high-pressure sealing window for a constant volume combustion bomb, which is mainly composed of a flange end cover 1, a quartz glass 4, an O-ring 3, a retaining ring 6, a high-strength graphite composite gasket 7, and It consists of 5 mounting bolts.
[0029] Combine image 3 As shown, the material of the flange end cover 1 is 45 steel, and its surface roughness is 3.2 μm to meet certain machining accuracy requirements; the diameter of the visible window is 100 mm. The flange end cover 1 is radially provided with an outer boss 1-1, and the outer boss 1-1 is provided with a mounting hole 2. The flange end cover 1 can be fixed by six evenly distributed M10 hexagon head mounting bolts On the body 10 of the constant volume incendiary bomb, high-strength bolts with an accuracy of 12.9 are selected for the installation bolts. When assembling, there should be a gap of 1~2mm between the inner side of the outer boss 1-1 and the outer wall of the elastic body 10, so that the pre-tightening force of the mounting bolts on the flange end cover 1 completely acts on the inner side of the flange end cover 1 and the elastic body 10 on the sealing surface 9 in contact with the inside. The sealing surface 9 inside the flange end cover 1 can be coated with high-temperature sealing red glue for further sealing.
[0030] The flange end cover 1 is provided with an outer first sealing step surface 1-2 and an inner second sealing step surface 1-3.
[0031] The quartz glass 4 is installed from the inner side of the flange end cover 1, and its outer side is axially limited by the first sealing step surface 1-2. A rectangular groove 8 is provided on the first sealing step surface 1-2, and a matching O-ring 3 is installed in the rectangular groove 8 to axially seal the quartz glass 4 and the flange end cover 1 and buffer vibration The role of. Rectangular groove 8 is a common groove form suitable for both motion sealing and fixed sealing, such as Figure 4 As shown, the width is 4.3mm and the depth is 2.4mm. According to the working conditions, the diameter of the O-ring 3 is 110mm, the cross-section is a circle with a diameter of 3.1mm, the compression rate is 10%-15%, the Shore hardness is 80±5, and the end cover flange 1 adopts axial static Sealed, its working pressure can reach 20Mpa. In addition, the O-ring 3 should have enough sealing contact area; the friction force should be as small as possible; and the permanent deformation should be avoided as much as possible. The radial contact surface of the flange end cover 1 and the quartz glass 4 is also coated with high temperature sealing red glue.
[0032] A retaining ring 6 is installed on the second sealing step surface 1-3 of the flange end cover 1, and the retaining ring 6 is axially limited by the second sealing step surface 1-3; at the same time, the inner diameter of the retaining ring 6 is smaller than the diameter of the quartz glass 4 , In order to limit its position from the inside of the quartz glass 4. The retaining ring 6 is made of No. 45 steel, with a surface roughness of 3.2 μm, and six bolt holes are evenly distributed. It is fixed on the flange end cover 1 with M6 hexagon socket countersunk head bolts 5. The countersunk bolt 5 sinks into the retaining ring 6, and the retaining ring 6 does not protrude from the sealing surface 9 inside the flange end cover 1, preventing the installation pre-tightening force between the flange end cover 1 and the elastic body 10 from passing through the retaining ring 6 It acts on the quartz glass 4 to avoid crushing of the quartz glass 4 due to excessive force.
[0033] A high-strength graphite composite gasket 7 is installed between the retaining ring 6 and the quartz glass 4 to compress the quartz glass 4 and play a sealing role. High-strength graphite composite gasket 7 pressure resistance 0-25Mpa, temperature resistance -200-1000℃ (except strong oxidants). The high-strength graphite composite gasket 7 axially seals the inside of the quartz glass 4 and plays a role of damping vibration. The gas expansion pressure in the cavity enhances the pre-tightening force for pressing the quartz glass 4, which can achieve the effect of self-tightening and sealing, and as the internal pressure of the cavity increases, its sealing performance is also enhanced.
[0034] The manufacturing and assembly steps of the above high temperature and high pressure sealed window are as follows:
[0035] Step 1: Select 45 steel, process the flange end cover 1 and the retaining ring 6 and ensure the processing accuracy of each part, and ensure that the roughness of each sealing surface is 3.2μm. A rectangular groove 8 with a diameter of 110 mm, a width of 4.3 mm and a depth of 2.4 mm is processed on the first sealing step surface 1-2 where the flange end cover 1 contacts the quartz glass 4.
[0036] Step 2: According to the size of the rectangular groove 8, an O-ring 3 with a diameter of 110 mm is selected and placed in the rectangular groove 8. The cross-sectional diameter of the O-ring 3 is 3.1mm, and the Shore hardness is 80±5.
[0037] Step 3: Wipe the quartz glass 4 clean, apply high-temperature sealing red glue on the side, and install it from the inner side of the flange end cover 1.
[0038] Step 4: Put in a suitable high-strength graphite composite gasket 7, install the retaining ring 6, and fix the retaining ring 6 with the hexagon socket countersunk head bolt 5 so that the pre-tightening force is slightly greater than the ultimate pressure of the constant volume combustion bomb cavity , Complete the assembly of the sealed window.
[0039] Step 5: Coat the sealing surface 9 on the inner side of the flange end cover 1 with high-temperature sealing red glue. The assembled sealing window is installed on the elastic body 10 by M10 high-strength mounting bolts. When tightening the mounting bolts, use a symmetrical sequence to make The sealing window is evenly stressed. There is a gap of 1-2mm between the inner side of the outer boss 1-1 of the flange end cover 1 and the elastic body 10, so that the bolt pre-tightening force of the flange end cover 1 is all acted on the inner side of the flange end cover 1. On the sealing surface 9, the sealing surface 9 has a better sealing effect due to the concentrated force.
[0040] Among them, the O-ring 3 and the high-strength graphite composite gasket 7 should be replaced regularly to prevent aging and air leakage.
[0041] Although the preferred embodiments of the present invention are described above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the enlightenment of the present invention, without departing from the purpose of the present invention and the protection scope of the claims, personnel can also make many specific changes, which all fall within the protection scope of the present invention.
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PUM

PropertyMeasurementUnit
Surface roughness1.6 ~ 3.2µm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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