Pressurization test sealing device of liquid rocket engine jet pipe

Abstract

The utility model relates to the technical field of sealing devices, in particular to a pressure test sealing device of a liquid rocket engine jet pipe, which comprises a base, a supporting cylinder, a sealing ring and a driving assembly. According to the utility model, through the arrangement of the sealing ring which deforms under pressure, after the spray pipe is placed, the driving assembly drives the upper end of the sealing ring to move downwards, so that the sealing ring deforms and bulges outwards, the diameter of the sealing ring is increased, the throat part of the spray pipe is blocked until the sealing ring cannot deform, and then a liquid pressing sealing performance test is carried out. Through the sealing mode, the sealing of the throat part is ensured, so that the problem that the sealing effect of the throat part of the spray pipe cannot be ensured in the prior art is solved, the time of the preparation work of the sealing performance test is shortened, and the test efficiency is improved. And the larger the downward moving distance of the upper end of the sealing ring is, the larger the deformation degree of the sealing ring is, and the larger the diameter of the sealing ring is, so that the device can adapt to spray pipes with different throat sizes, and the universality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing device technical field, concretely relates to a kind of pressurizing test sealing device of liquid rocket engine nozzle. BACKGROUND

[0002] Liquid rocket engine nozzle is the important configuration of rocket engine, compared with other configuration's nozzle, with the characteristics of big thrust under the same condition condition.Due to big thrust, the requirement of structural strength and sealing of liquid rocket engine nozzle is higher.After nozzle processing is completed, in order to test the sealing of nozzle, it needs to be pressurized by pressurizing device for test.And in the process of testing, sealing device is needed to seal the throat of nozzle;But the sealing effect of traditional pressurizing sealing device to nozzle throat cannot be guaranteed, needs to be debugged multiple times, and when pressurizing sealing test is carried out to different size nozzles, corresponding rubber sealing band needs to be replaced, and the universality is poor. SUMMARY

[0003] According to the deficiencies of prior art, the utility model provides a kind of pressurizing test sealing device of liquid rocket engine nozzle, which can be well sealed to the throat of nozzle, and can be adapted to different size nozzles.

[0004] The pressurizing test sealing device of liquid rocket engine nozzle of the utility model adopts the following technical scheme: including:

[0005] Base, fixedly connected with support frame on it, and support frame is used to support nozzle;

[0006] Supporting cylinder, vertically extends, and is fixedly connected to support frame;

[0007] Sealing ring, sealing ring vertically extends, the lower end of sealing ring is in abutment with the upper end of supporting cylinder, and the upper end of sealing ring is connected to support frame by connecting assembly;When sealing ring is subjected to vertical pressure, the middle part of sealing ring bulges outward;Sealing ring is made of rubber;

[0008] Driving assembly is used to drive the upper end of sealing ring to move downward.

[0009] Optionally, support frame is fixedly connected with a plurality of support rods;A plurality of support rods are evenly distributed along the circumference of supporting cylinder, and support rod extends along vertical direction;Compression frame for compressing nozzle is arranged above support frame.

[0010] Optionally, compression frame is slidingly installed on support rod;Distance adjusting assembly is arranged on support rod, and distance adjusting assembly is used to adjust the distance between the lower surface of compression frame and the upper surface of support frame.

[0011] Optionally, the connecting assembly comprises a connecting cylinder, an upper cover, a supporting cylinder, a transmission cylinder and a sliding block; the connecting cylinder is fixedly connected to the supporting frame, the connecting cylinder vertically extends, and a vertical sliding groove is arranged on the connecting cylinder; the sliding block is slidingly installed in the sliding groove; the transmission cylinder vertically extends, the lower end of the transmission cylinder is fixedly connected to the sliding block, and the upper end of the transmission cylinder is fixedly connected to the upper cover; the upper cover is fixedly connected to the upper end of the sealing ring, and the upper cover is made of rubber; the supporting cylinder vertically extends, the supporting cylinder is coaxially sleeved on the transmission cylinder, and the upper end of the supporting cylinder is fixedly connected to the upper cover; the outer wall of the supporting cylinder is attached to the inner wall of the sealing ring; and the driving assembly is used to drive the sliding block to slide in the sliding groove.

[0012] Optionally, the driving assembly comprises a screw rod and a driving piece, the screw rod vertically extends, the screw rod is rotationally installed in the supporting cylinder, and the screw rod is rotationally connected to the supporting cylinder through two angular contact ball bearings; and the sliding block is threadedly connected to the screw rod.

[0013] Optionally, the driving piece is a hand wheel, and the hand wheel is fixedly connected to the screw rod.

[0014] Optionally, the upper end of the pressing frame is fixedly connected with a plurality of lifting lugs.

[0015] Optionally, the outer periphery of the sealing ring is uniformly distributed with a plurality of protrusions in the vertical direction, and the sealing ring and the protrusions are integrally formed.

[0016] The sealing device for the liquid rocket engine nozzle has the following beneficial effects: the sealing device for the liquid rocket engine nozzle of the utility model is provided with a sealing ring that deforms under pressure, after the nozzle is placed, the upper end of the sealing ring is driven to move downward by the driving assembly, so that the sealing ring deforms, bulges outward, the diameter of the sealing ring increases, the throat of the nozzle is blocked, and the upper end of the sealing ring cannot move downward, and then the liquid pressure sealing test is performed. The sealing mode can ensure the sealing of the throat, thereby solving the problem that the sealing effect of the throat of the nozzle cannot be ensured in the prior art, shortening the time length of the preparation work of the sealing test, and improving the test efficiency. The greater the distance that the upper end of the sealing ring moves downward, the greater the deformation degree of the sealing ring, and the greater the diameter of the sealing ring, so that the nozzle with different throat sizes can be matched, and the universality is improved.

[0017] Further, the nozzle is fixed by the pressing frame and the distance adjusting assembly, and nozzles with different lengths can be sealed, further improving the universality of the sealing device. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0019] Figure 1 It is overall structure schematic view of the sealing device for the press test of the liquid rocket engine nozzle of the utility model;

[0020] Figure 2 It is mechanism schematic view of the sealing ring and the driving assembly in the utility model;

[0021] Figure 3 It is Figure 2 Structure sectional view.

[0022] In the figure: 1, base; 2, support cylinder; 3, sealing ring; 4, support bracket; 5, support rod; 6, compression frame; 7, lifting lug; 8, nut, 9, connecting cylinder; 10, upper cover; 11, support cylinder; 12, transmission cylinder; 13, sliding block; 14, screw rod; 15, angular contact ball bearing; 16, hand wheel. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] As Figures 1 to 3 Indicated, the sealing device for the press test of the liquid rocket engine nozzle provided by the utility model embodiment includes base 1, support cylinder 2, sealing ring 3 and driving assembly;

[0025] The base 1 is fixedly connected with the support bracket 4, and the support bracket 4 is used for supporting the nozzle; the support cylinder 2 extends vertically and is fixedly connected to the support bracket 4;

[0026] The support bracket 4 is fixedly connected with a plurality of support rods 5; the plurality of support rods 5 are uniformly distributed along the circumference of the support cylinder 2, and the support rods 5 extend along the vertical direction; the compression frame 6 for compressing the nozzle is arranged above the support bracket 4; the compression frame 6 is slidingly installed on the support rods 5; the upper end of the compression frame 6 is fixedly connected with a plurality of lifting lugs 7; the distance adjusting assembly is arranged on the support rods 5, and the distance adjusting assembly is used for adjusting the distance between the lower surface of the compression frame 6 and the upper surface of the support bracket 4; the distance adjusting assembly includes a plurality of nuts 8; the support rods 5 are provided with threads, and each support rod 5 is threadedly connected with two nuts 8, which are located on the upper and lower sides of the compression frame 6 respectively;

[0027] The sealing ring 3 vertically extends, the lower end of the sealing ring 3 abuts with the upper end of the supporting cylinder 2, and the upper end of the sealing ring 3 is connected to the supporting frame 4 through a connecting assembly; the outer periphery of the sealing ring 3 is uniformly distributed with a plurality of protrusions in the vertical direction, the sealing ring 3 and the protrusions are integrally formed, and the sealing ring 3 is made of rubber; the sealing ring 3 is configured to bulge outward at the middle part when subjected to vertical pressure; the connecting assembly includes a connecting cylinder 9, an upper cover 10, a supporting cylinder 11, a transmission cylinder 12 and a sliding block 13; the connecting cylinder 9 is fixedly connected to the supporting frame 4, vertically extends, and is provided with a vertical sliding groove on the upper end; the sliding block 13 is slidingly installed in the sliding groove; the transmission cylinder 12 vertically extends, the lower end is fixedly connected to the sliding block 13, and the upper end is fixedly connected to the upper cover 10; the upper cover 10 is fixedly connected to the upper end of the sealing ring 3 and is made of rubber; the supporting cylinder 11 vertically extends, coaxially sleeves the transmission cylinder 12, and the upper end is fixedly connected to the upper cover 10; the outer wall of the supporting cylinder 11 is attached to the inner wall of the sealing ring 3; and the driving assembly is used to drive the sliding block 13 to slide in the sliding groove.

[0028] The driving assembly is used to drive the upper end of the sealing ring 3 to move downward. The driving assembly includes a screw rod 14 and a driving part, the screw rod 14 vertically extends, is rotationally installed in the supporting cylinder 2, and is rotationally connected to the supporting cylinder 2 through two angular contact ball bearings 15; and the sliding block 13 is threadedly connected to the screw rod 14. The driving part is a hand wheel 16, which is fixedly connected to the screw rod 14.

[0029] The driving part can also be a driving motor and a speed reducer, the output end of the driving motor is connected to the input end of the speed reducer, and the output end of the speed reducer is connected to the screw rod 14.

[0030] Before the pressure test is performed, the nozzle is vertically placed on the supporting frame 4, the end of the tapered section is in contact with the supporting frame 4; one nut 8 is installed on each supporting rod 5 and is rotated to the corresponding position on the upper end of the nozzle; the pressing frame 6 is hoisted to the upper side of the supporting rod 5 by using the lifting setting hook to hook the lifting lug 7, and the supporting rod 5 passes through the pressing frame 6, and the longer the length of the nozzle is, the higher the height of the pressing frame 6 is; thereafter, another nut 8 is installed on each supporting rod 5, and the height of the supporting frame is finely adjusted through the nut 8, so that the pressing frame 6 gives pressure to the nozzle, thereby fixing the nozzle on the supporting frame 4, and the installation work is completed, and at this time, the sealing ring 3 is located at the throat position of the nozzle.

[0031] After installation, rotate the hand wheel 16, in the process of rotating the hand wheel 16, the screw rod 14 rotates synchronously, because the slider 13 and the screw rod 14 are threadedly matched, so when the screw rod 14 rotates, the slider 13 moves downward in the sliding groove, in turn drives the transmission cylinder 12 to move downward, when the transmission moves downward, the upper cover 10 moves downward synchronously, because the lower end of the sealing ring 3 abuts against the upper end of the support cylinder 2, when the upper cover 10 moves downward, the upper cover 10 drives the support cylinder 11 to move downward synchronously, the sealing ring 3 is subjected to vertical pressure, because the inner wall of the sealing ring 3 abuts against the support cylinder 11, so when the sealing ring 3 deforms, the axial length of the sealing ring 3 decreases, the diameter of the sealing ring 3 increases, the sealing ring 3 bulges outward, the distance between the sealing ring 3 and the throat of the nozzle gradually decreases, when the sealing ring 3 completely seals the nozzle, the sealing ring 3 is subjected to the pressure of the throat of the nozzle and cannot continue to deform, at this time, the hand wheel 16 cannot continue to rotate, when the diameter of the nozzle is larger, the angle of rotation of the hand wheel 16 is larger, and the deformation amount of the sealing ring 3 is larger, so that nozzles with different diameters can be matched. At this time, the sealing work before detection is completed, and then the liquid pressure test device is used to test the nozzle.

[0032] The sealing device for pressure test of the liquid rocket engine nozzle of the utility model can ensure the sealing of the throat, thereby solving the problem that the sealing effect of the nozzle throat cannot be guaranteed in the prior art, thereby shortening the time length of the sealing test preparation work and improving the test efficiency. The greater the distance that the upper end of the sealing ring 3 moves downward, the greater the degree of deformation of the sealing ring 3, and the greater the diameter of the sealing ring 3, so that nozzles with different throat sizes can be matched, and the universality is improved. By arranging the pressing frame 6 and the distance adjusting assembly, the nozzle can be fixed, and nozzles with different lengths can be sealed, further improving the universality of the sealing device.

[0033] The above merely describes preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A proof test seal apparatus for a liquid rocket engine nozzle, comprising: The utility model relates to a sealing device for a spray pipe, comprising: a base, a supporting frame fixedly connected to the base, the supporting frame being used for supporting the spray pipe; a supporting cylinder vertically extending, the supporting cylinder being fixedly connected to the supporting frame; a sealing ring vertically extending, a lower end of the sealing ring abutting against an upper end of the supporting cylinder, an upper end of the sealing ring being connected to the supporting frame through a connecting assembly; the sealing ring being configured to bulge outwards at a middle portion of the sealing ring when subjected to vertical pressure; the sealing ring being made of rubber; a driving assembly for driving the upper end of the sealing ring to move downwards.

2. A pressurization test seal for a liquid rocket engine nozzle as defined in claim 1, wherein, The supporting frame is fixedly connected to a plurality of supporting rods; the plurality of supporting rods are uniformly distributed along a circumferential direction of the supporting cylinder, the supporting rods extending along a vertical direction; an upper portion of the supporting frame is provided with a pressing frame for pressing the spray pipe.

3. A pressurization test seal for a liquid rocket engine nozzle as recited in claim 2, wherein, The pressing frame is slidingly installed on the supporting rods; the supporting rods are provided with a distance adjusting assembly for adjusting a distance between a lower surface of the pressing frame and an upper surface of the supporting frame.

4. A pressurization test seal for a liquid rocket engine nozzle as defined in claim 3, wherein, The connecting assembly comprises a connecting cylinder, an upper cover, a supporting cylinder, a transmission cylinder and a sliding block; the connecting cylinder is fixedly connected to the supporting frame, the connecting cylinder vertically extending, the connecting cylinder being provided with a vertical sliding groove; the sliding block is slidingly installed in the sliding groove; the transmission cylinder vertically extending, a lower end of the transmission cylinder being fixedly connected to the sliding block, an upper end of the transmission cylinder being fixedly connected to the upper cover; the upper cover being fixedly connected to the upper end of the sealing ring, the upper cover being made of rubber; the supporting cylinder vertically extending, the supporting cylinder being coaxially sleeved on the transmission cylinder, an upper end of the supporting cylinder being fixedly connected to the upper cover; an outer wall of the supporting cylinder being in abutment with an inner wall of the sealing ring; the driving assembly being used for driving the sliding block to slide in the sliding groove.

5. A pressurization test seal for a liquid rocket engine nozzle as defined in claim 4, wherein, The driving assembly comprises a screw rod and a driving member, the screw rod vertically extending, the screw rod being rotatably installed in the supporting cylinder, the screw rod and the supporting cylinder being rotatably connected through two angular contact ball bearings; the sliding block being threadedly connected to the screw rod.

6. A pressurization test seal for a liquid rocket engine nozzle as defined in claim 5, wherein, The driving member is a hand wheel, the hand wheel being fixedly connected to the screw rod.

7. A pressurization test seal for a liquid rocket engine nozzle as defined in claim 1, wherein, An upper end of the pressing frame is fixedly connected to a plurality of lifting lugs.

8. A pressurization test seal for a liquid rocket engine nozzle as defined in claim 1, wherein, A plurality of protrusions are uniformly distributed along a vertical direction of an outer periphery of the sealing ring, the sealing ring and the protrusions being integrally formed.

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