CN106840580B - A kind of diaphragm positioning clamping device - Google Patents
A kind of diaphragm positioning clamping device Download PDFInfo
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- CN106840580B CN106840580B CN201611118640.8A CN201611118640A CN106840580B CN 106840580 B CN106840580 B CN 106840580B CN 201611118640 A CN201611118640 A CN 201611118640A CN 106840580 B CN106840580 B CN 106840580B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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Abstract
The present invention relates to a kind of diaphragm positioning clamping devices, including slotted nut, left-handed screw, right handed screw, adjusting ring；The external screw thread of left-handed screw is matched with the internal screw thread of slotted nut left handed threaded hole, and external screw thread circumferentially forms alveolus cross structure；The inside of left-handed screw has through-hole identical with wind-tunnel shock wave pipe diameter；The external screw thread of right handed screw is matched with the internal screw thread in slotted nut right-handed thread hole, and external screw thread circumferentially forms alveolus cross structure；The through-hole of right handed screw is the venturi section of wind tunnel nozzle；Compressed air is adjusted inside ring through the elongated slot in left-handed screw, acts on diaphragm left end, after rupture of diaphragm, compressed air enters wind tunnel nozzle through the elongated slot of right handed screw.The present invention only passes through the hydraulic push-pull mechanism of shock tube and jet pipe, can insert a stem into slotted nut；Slotted nut rotation is driven by setting oscillating motor, engagement can be realized and clamp, unclamp, equipment operation is simple, high degree of automation.
Description
Technical field
The present invention relates to a kind of diaphragm positioning clamping devices, belong to wind tunnel test field.
Background technique
In high energy pulse wind-tunnel totality pneumatic design, is realized using the rupture of membranes method of operation and be quickly obtained stable high ultrasound
Fast flow field；Diaphragm ruptures in each test, so being required to replacement diaphragm before test every time.Most of relevant devices simultaneously
Place diaphragm between wind-tunnel shock tube and the connecting flange of wind tunnel nozzle because the characteristics of flanged joint, connecting flange it
Between diaphragm clamp positioning and fall flat, the operation of influence power wind-tunnel rupture of membranes, and the operation replaced every time is extremely complex.
Therefore this field is badly in need of providing a kind of diaphragm positioning and clamping device, guarantees that diaphragm clamps close, accurate positioning, and
Convenient for diaphragm replacement.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of diaphragm positioning clamping devices, solve diaphragm
Orientation problem, and realize the fast assembling-disassembling of diaphragm.
The object of the invention is achieved by following technical solution:
A kind of diaphragm positioning clamping device, including slotted nut, left-handed screw, right handed screw, adjusting ring are provided；
The inside of the slotted nut is the left handed threaded hole set gradually, card slot and right-handed thread hole；Left handed threaded hole
With levogyrate inner thread, levogyrate inner thread is circumferentially provided with the elongated slot that central angle is 23.5 °, levogyrate inner thread edge every 21.5 °
It is circumferential to form alveolus cross structure；Right-handed thread hole has levogyrate inner thread, and dextrorotation internal screw thread is circumferentially provided with circle every 21.5 °
The elongated slot that heart angle is 23.5 °, dextrorotation internal screw thread circumferentially form alveolus cross structure；Card slot adjusts ring for positioning to place；
The external screw thread of left-handed screw is matched with the internal screw thread of slotted nut left handed threaded hole, external screw thread circumferentially every
21.5 ° are provided with the elongated slot that central angle is 23.5 °, and external screw thread circumferentially forms alveolus cross structure；Until left-handed screw left side
Mouthful, for being connect with wind-tunnel shock tube；The inside of left-handed screw has through-hole identical with wind-tunnel shock wave pipe diameter；
The external screw thread of right handed screw is matched with the internal screw thread in slotted nut right-handed thread hole, external screw thread circumferentially every
21.5 ° are provided with the elongated slot that central angle is 23.5 °, and external screw thread circumferentially forms alveolus cross structure；Until right handed screw right side
Mouthful, it is connect for the diffuser with wind tunnel nozzle；The inside of right handed screw has through-hole, and through-hole is the venturi section of wind tunnel nozzle,
The entrance of venturi section is the entrance of wind tunnel nozzle, and the outlet end of venturi section and the diffuser of wind tunnel nozzle are tightly connected；
The adjusting ring is circular ring structure, and the outer ring of right side is annular projection, for the outer rim against diaphragm；When left-handed
When screw rod insertion screws, when right handed screw screws, diaphragm is compacted to against the left side for adjusting ring for the right side of left-handed screw
Adjust the right side of ring；
Compressed air is adjusted inside ring through the elongated slot in left-handed screw, acts on diaphragm left end, after rupture of diaphragm, compression
Air enters wind tunnel nozzle through the elongated slot of right handed screw.
Preferably, the seam allowance of left-handed screw and the seam allowance of right handed screw are respectively provided with for placing the recessed of ring type seal
Slot；Left-handed screw and wind-tunnel shock tube are tightly connected, and the diffuser of right handed screw and wind tunnel nozzle is tightly connected.
It preferably, further include bearing block and unwheeling, bearing block is used to support slotted nut, while guaranteeing that slotted nut rotates
Track, unwheeling are used to diaphragm positioning clamping device being supported on the track being laid in advance for wind tunnel body by wheel group.
Preferably, further include two groups of guide rods, set on the flange of left-handed screw there are two be oriented to rod through-hole, right handed screw
Flange on set there are two rod through-hole is oriented to, two guide rods of first group of guide rod are set on flange respectively there are two guide rod
Through-hole is inserted into unwheeling, and two guide rods of second group of guide rod are set on flange respectively, and there are two guiding rod through-holes to be inserted into
In unwheeling, when replacing diaphragm, left-handed screw is moved along first group of guide rod, and right handed screw is moved along second group of guide rod.
A kind of installation method based on the diaphragm positioning clamping device is provided, is included the following steps:
(1) left-handed screw, which is rotated to externally threaded tooth portion, is directed at slotted nut levogyrate inner thread groove portion, and extracts left-handed spiral shell
Bar；Right handed screw is rotated to externally threaded tooth portion simultaneously and is directed at slotted nut dextrorotation internal screw thread groove portion, and extracts right handed screw；
(2) diaphragm of rupture is taken out, then ring will be adjusted and taken out；
(3) mode of the externally threaded tooth portion alignment slotted nut levogyrate inner thread groove portion of left-handed screw, by left-handed screw
It is inserted into inside slotted nut；
(4) ring will be adjusted to be placed in the card slot of slotted nut, right end places new diaphragm；
(5) mode of the externally threaded tooth portion alignment slotted nut dextrorotation internal screw thread groove portion of right handed screw, by right handed screw
It is inserted into inside slotted nut；Rotary slotted nut to left-handed screw and right handed screw is engaged with slotted nut simultaneously；
(6) wind tunnel experiment is carried out.
It preferably, further include determining the left end flange of left-handed screw with seam allowance and wind-tunnel shock tube before step (1) executes
Position, then be bolted；Right handed screw right end flange is consolidated with the positioning of the diffuser of seam allowance and wind tunnel nozzle, then by bolt
It is fixed.
The invention has the following advantages over the prior art:
(1) principle of the present invention according to screw thread engagement designs the nut with left and right rotation direction screw hole, be respectively provided with it is left,
Dextrorotation to screw rod synchro-meshing realizing by the effect for the adjusting ring for being mounted on nut interior by wind-tunnel shock tube and wind
While the connection sealing of hole jet pipe, it is ensured that the diaphragm positioning being arranged between shock tube and jet pipe clamps；Only pass through shock tube and spray
The screw rod of left and right rotation direction can be inserted into slotted nut by the hydraulic push-pull mechanism of pipe, no setting is required additional promotion machine
Structure；Slotted nut rotation is driven by setting oscillating motor, engagement can be realized and clamp, unclamp.Equipment operation is simple, automatically
Change degree is high, and diaphragm clamps uniform force.
(2) present invention screw thread, rest part setting growth at the externally threaded circumferential reservation 8 of the screw hole and screw rod of nut
Slot guarantees the convenience of the replacement of the abundant and diaphragm of engagement.
(3) present invention is integral by the venturi section of wind tunnel nozzle and fluting right handed screw design, ensure that wind tunnel nozzle enters
The accurate positionin of mouth and diaphragm reduces the influence that folder film device establishes Flow Field in Wind Tunnel, improves wind tunnel nozzle and upstream portion
The connection positioning accuracy and sealing performance of part.
(4) present invention adjusts ring structure and not only realizes by between folder film device completion wind-tunnel shock tube and wind tunnel nozzle
Reliable connection and sealing, and meet the technical requirements of the diaphragm positioning and clamping of wind-tunnel pneumatic design proposition.
(5) present invention left-handed screw of slotting, right handed screw of slotting flange and unwheeling between two guide rod is set
Meter guarantees two sub-screw kinematic accuracies and accurate positioning when folding film movement.
Detailed description of the invention
Fig. 1 (a) is the main view of diaphragm positioning clamping device of the present invention, and Fig. 1 (b) is diaphragm positioning clamping device of the present invention
Left view；
Fig. 2 (a) is the main view of slotted nut structure, and Fig. 2 (b) is the left view of slotted nut structure；
Fig. 3 (a) is the left view of fluting left-handed screw, and Fig. 3 (b) is the main view of fluting left-handed screw；
Fig. 4 (a) is the main view of fluting right handed screw, and Fig. 4 (b) is the right view of fluting right handed screw；
Fig. 5 (a) is the left view that two way seal adjusts ring, and Fig. 5 (b) is the main view that two way seal adjusts ring；
Fig. 6 (a) is the main view for opening and closing film guide rod, bearing block and unwheeling, and Fig. 6 (b) is folding film guide rod, bearing block
With the left view of unwheeling.
Specific embodiment
It is a kind of use fluting screw thread engagement Automatic-clamping diaphragm device shown in Fig. 1, is required according to wind-tunnel pneumatic design,
Setting diaphragm together is needed before high energy pulse wind-tunnel shock tube and nozzle entry, while guaranteeing the accurate positionin and sealing of diaphragm.
Slotted nut 102 has two threaded holes, fluting left-handed screw 101 and right handed screw 103 of slotting of left and right rotation direction
External screw thread is preserved for the screw thread of engagement respectively, and rest part is processed into elongated slot, to guarantee fluting left-handed screw 101 and open
Slot right handed screw 103 can be smoothly inserted into out of slotted nut 102 threaded hole, extract, and realize the replacement of diaphragm.Elongated slot effect
The left-handed screw 101 and male thread portion in the right handed screw 102 slotted for being easy for fluting can be along in slotted nuts 102
Elongated slot is inserted into nut interior, guarantees the engagement initial position between screw thread；Elongated slot is to correspond to central angle on external screw thread to be
The processing of 23.5 ° of screw threads removes and the sector structure that is formed, and depth is identical as thread depth, and bottom is identical as diameter of thread.
When slotted nut 102 is in " release " state, fluting left-handed screw 101 is under the action of driving equipment along fluting spiral shell
Female 102 left-handed screw holes correspond to slotting position and are inserted into screw hole；Right handed screw 103 of slotting is under the action of driving equipment along fluting
102 dextrorotation screw hole of nut corresponds to slotting position and is inserted into screw hole；Under the driving of the hydraulic cylinder at slotted nut both ends, spiral shell of slotting
For mother 102 according to the rotation of setting track in bearing block 105, slotted nut is in " tightening " state, real according to the screw thread theory of engagement
Now fluting left-handed screw 101, fluting right handed screw 103 and 102 synchro-meshing of slotted nut movement.
Left-handed screw 101 slot after engaging with the left-handed screw hole of slotted nut 102, the effect by adjusting ring 104 is realized
Wind-tunnel components downstream connection and sealing；Fluting right handed screw 103 is engaged with the dextrorotation screw hole of slotted nut 102, since diaphragm exists
Fluting right handed screw 103 has been placed in front of being inserted into and adjusts on ring 104, by adjusting ring 104 and fluting right handed screw after engagement
Under 103 collective effect, the accurate positionin and clamping of diaphragm are realized；It is connect simultaneously with wind-tunnel upstream equipment, to realize high energy arteries and veins
It rushes wind-tunnel rupture of membranes and necessary condition is provided.
The above equipment is supported in unwheeling 106 by bearing block 105, it is ensured that folder film device is determined with wind-tunnel datum axis
Position guarantees that fluting left-handed screw 101 and fluting right handed screw 103 are extracted and are inserted into smooth when replacing diaphragm.Bearing block point
For upper and lower two parts, semicircular configuration, slotted nut 102 is placed among two rings, is connected bearing block 105 admittedly with bolt
Fixed, bottom is connected with to be connect with unwheeling, and unwheeling 106 by wheel group for being supported on diaphragm positioning clamping device for wind
On the track that hole hole body is laid in advance.
Fig. 2 has left and right rotation direction slotted nut, according to the principle that screw thread engages, to guarantee that fluting left-handed screw and fluting are right
Screw rod synchro-meshing movement is revolved, design has left-handed, two rotation directions of dextrorotation threaded hole slotted nuts respectively；In order to guarantee spiral shell
Mother sufficiently engages between screw rod, and meets with changing the requirement such as diaphragm, and fluting left-handed screw and fluting right handed screw can be smooth
Slave nut in into and out corresponding to central angle 23.5 (slot) ° part with two threaded holes of dextrorotation for left-handed in nut
Screw thread removes and is changed to elongated slot at totally 8, leaves 21.5 ° of corresponding central angle (tooth), sees Fig. 2, at 8 screw thread still be able to guarantee screw rod with
The engagement action of nut.
Fig. 3 fluting left-handed screw thread size and rotation direction are identical as the left-handed screw hole of slotted nut, to ensure screw rod and nut
Abundant engagement demand, threaded portion corresponding with slotted nut levogyrate inner thread is arranged to 23.5 ° of central angle of elongated slot, totally 8
Place retains screw thread at the 8 of corresponding 21.5 ° of central angle and is used to engage with slotted nut left-handed screw hole, slot left-handed screw internal diameter and
Wind-tunnel shock tube is consistent, and seal groove is arranged in seam allowance, and seam allowance locating flange connects the sealing of " o " type circle.Elongated slot is on external screw thread
The sector structure that the processing that central angle is 23.5 ° of screw threads is removed and formed is corresponded to, depth is identical as thread depth, bottom and screw thread
Path is identical.
Fig. 4 fluting right handed screw thread size and rotation direction are identical as slotted nut dextrorotation screw hole, to ensure screw rod and nut
The demand for sufficiently engaging and opening the movements such as film, threaded portion corresponding with slotted nut dextrorotation internal screw thread is arranged to central angle
23.5 ° of elongated slot at totally 8, retains screw thread at the 8 of corresponding 21.5 ° of central angle and is used to engage with slotted nut dextrorotation screw hole, fluting
Right handed screw connect the sealing of " o " type circle using seam allowance locating flange with wind tunnel nozzle.
To guarantee the effect of diaphragm rupture of membranes and the influence of stream field foundation, the larynx for the right handed screw 103 and wind tunnel nozzle of slotting
Road section uses integrated design, and not only wind tunnel nozzle critical component --- venturi section is located by connecting accurate for raising, and promotes film
The rupture of membranes effect of piece reduces interference.
Fig. 5 adjusting ring internal diameter is identical as wind-tunnel shock wave bore and wind tunnel nozzle venturi section entrance, adjusts ring two sides and respectively sets
It is equipped with two seals slot, ensures shock tube and spray after fluting left-handed screw and fluting right handed screw and slotted nut synchro-meshing
The sealing of pipeline section connection adjusts the right side setting diaphragm positioning and locking structure of ring, it is ensured that the clamping of folder film device movement rear film.
The outer ring side ring protrusion of right end, for compressing diaphragm, diaphragm is identical as the outer diameter of ring is adjusted, and compresses film by outer ring side ring protrusion
Piece makes diaphragm under the effect of the pressure with the rupture of anti-tampering diaphragm, ruptures along preset mode.
Fig. 6 is on the flange that left-handed screw is connect with wind-tunnel shock tube, on the flange that right handed screw is connect with jet pipe, respectively
Provided with two guide rods, guarantee when opening film, pressing from both sides the movement of film, accurate positioning is extracted in left-handed screw and right handed screw insertion.
Unwheeling is supported on the track being laid in advance for wind tunnel body by wheel group, it is ensured that folder film device position in construction of wind tunnel.Really
Protect screw rod from nut into and out when movement position it is accurate.
The left end flange of left-handed screw 101 is positioned with seam allowance and wind-tunnel shock tube, passes through 16 diameter phis on flange
50 hole, 16 M48x5 studs and corresponding nut are realized and shock tube flanged joint and tension.103 left end of right handed screw
Flange is positioned with seam allowance and wind tunnel nozzle, by the 16 M48x5 studs in hole of 16 diameter phis 50 on flange and right
Nut realization is answered to connect and tense with jet pipe.
The technical requirements of diaphragm, hair are placed between wind-tunnel shock tube and wind tunnel nozzle to realize the proposition of wind-tunnel pneumatic design
This bright set uses fluting screw thread to engage Automatic-clamping diaphragm device, synchronizes and opens by fluting left-handed screw, fluting right handed screw
After the engagement of slot nut, according to the screw thread theory of engagement, by the push-and-pull conversion screw rod linear motion of hydraulic cylinder, by the work for adjusting ring
With, it is ensured that wind-tunnel shock tube and the accurate connection and sealing of wind tunnel nozzle, while by the diaphragm positioning and clamping of nozzle entry, it is
Flow Field in Wind Tunnel, which is established, provides necessary condition；Screw rod and nut in corresponding position by cutting elongated groove at screw thread, unwheeling and screw rod flange it
Between be provided with guide rod, guarantee when replacement diaphragm screw rod can smoothly into and out.
The installation method of diaphragm positioning clamping device, specifically comprises the following steps:
(1) the left end flange of left-handed screw is positioned with seam allowance and wind-tunnel shock tube, then be bolted；Right handed screw
Right end flange is with the positioning of the diffuser of seam allowance and wind tunnel nozzle, then is bolted.Left-handed screw is rotated to externally threaded tooth
Portion is directed at slotted nut levogyrate inner thread groove portion, and extracts left-handed screw；Right handed screw is rotated to externally threaded tooth portion simultaneously
It is directed at slotted nut dextrorotation internal screw thread groove portion, and extracts right handed screw；
(2) diaphragm of rupture is taken out, then ring will be adjusted and taken out；
(3) mode of the externally threaded tooth portion alignment slotted nut levogyrate inner thread groove portion of left-handed screw, by left-handed screw
It is inserted into inside slotted nut；
(4) ring will be adjusted to be placed in the card slot of slotted nut, right end places new diaphragm；
(5) mode of the externally threaded tooth portion alignment slotted nut dextrorotation internal screw thread groove portion of right handed screw, by right handed screw
It is inserted into inside slotted nut；Rotary slotted nut to left-handed screw and right handed screw is engaged with slotted nut simultaneously；
(6) wind tunnel experiment is carried out.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (6)
1. a kind of diaphragm positioning clamping device, including slotted nut (102), left-handed screw (101), right handed screw (103), adjusting
Ring (104)；
The inside of the slotted nut (102) is the left handed threaded hole set gradually, card slot and right-handed thread hole；Left handed threaded hole
With levogyrate inner thread, levogyrate inner thread is circumferentially provided with the elongated slot that central angle is 23.5 °, levogyrate inner thread edge every 21.5 °
It is circumferential to form alveolus cross structure；Right-handed thread hole has levogyrate inner thread, and dextrorotation internal screw thread is circumferentially provided with circle every 21.5 °
The elongated slot that heart angle is 23.5 °, dextrorotation internal screw thread circumferentially form alveolus cross structure；Card slot adjusts ring for positioning to place
(104)
The external screw thread of left-handed screw (101) is matched with the internal screw thread of slotted nut (102) left handed threaded hole, and external screw thread is circumferentially every
The elongated slot that central angle is 23.5 ° is provided with every 21.5 °, external screw thread circumferentially forms alveolus cross structure；Left-handed screw left side is
Seam allowance, for being connect with wind-tunnel shock tube；The inside of left-handed screw (101) has through-hole identical with wind-tunnel shock wave pipe diameter；
It is characterized by:
The external screw thread of right handed screw (103) is matched with the internal screw thread in slotted nut (102) right-handed thread hole, and external screw thread is circumferentially every
The elongated slot that central angle is 23.5 ° is provided with every 21.5 °, external screw thread circumferentially forms alveolus cross structure；Right handed screw right side is
Seam allowance is connect for the diffuser with wind tunnel nozzle；The inside of right handed screw (103) has through-hole, and through-hole is wind tunnel nozzle
Venturi section, the entrance of venturi section are the entrance of wind tunnel nozzle, and the outlet end of venturi section and the diffuser of wind tunnel nozzle are tightly connected；
The adjusting ring (104) is circular ring structure, and the outer ring of right side is annular projection, for the outer rim against diaphragm；Work as a left side
When rotation screw rod (101) insertion screws, the right side of left-handed screw (101) is against the left side for adjusting ring (104), right handed screw
(103) when screwing, diaphragm is compacted to the right side for adjusting ring (104)；
Compressed air adjusts ring (104) inside through the elongated slot in left-handed screw (101), acts on diaphragm left end, works as rupture of diaphragm
Afterwards, compressed air enters wind tunnel nozzle through the elongated slot of right handed screw (103).
2. diaphragm positioning clamping device according to claim 1, which is characterized in that the seam allowance of left-handed screw (101) and dextrorotation
The seam allowance of screw rod (103) is respectively provided with the groove for placing ring type seal；Left-handed screw (101) and the wind-tunnel shock wave seal of tube
The diffuser of connection, right handed screw (103) and wind tunnel nozzle is tightly connected.
3. diaphragm positioning clamping device according to claim 1, which is characterized in that further include bearing block (105) and unwheeling
(106), bearing block (105) is used to support slotted nut (102), while guaranteeing slotted nut rotational trajectory, and unwheeling (106) is used for
Diaphragm positioning clamping device is supported on the track being laid in advance for wind tunnel body by wheel group.
4. diaphragm positioning clamping device according to claim 1, which is characterized in that further include two groups of guide rods, left-handed screw
(101) it is set on flange there are two rod through-hole is oriented to, is set on the flange of right handed screw (103) there are two being oriented to rod through-hole, first
Two guide rods of group guide rod are set on flange respectively, and there are two guiding rod through-holes to be inserted into unwheeling, second group of guide rod
Two guide rods are set on flange respectively, and there are two guiding rod through-holes to be inserted into unwheeling, when replacing diaphragm, left-handed screw
(101) it is moved along first group of guide rod, right handed screw (103) is moved along second group of guide rod.
5. a kind of installation method based on diaphragm positioning clamping device described in claim 1, it is characterised in that include the following steps:
(1) left-handed screw (101) rotation to externally threaded tooth portion is directed at slotted nut (102) levogyrate inner thread groove portion, and extracts
Left-handed screw (101)；Simultaneously by spiral shell in right handed screw (103) rotation to externally threaded tooth portion alignment slotted nut (102) dextrorotation
Groove portion, and extract right handed screw (103)；
(2) diaphragm of rupture is taken out, then ring (104) will be adjusted and taken out；
(3) mode of externally threaded tooth portion alignment slotted nut (102) levogyrate inner thread groove portion of left-handed screw (101), will be left
It is internal to revolve screw rod (101) insertion slotted nut (102)；
(4) ring (104) will be adjusted to be placed in the card slot of slotted nut (102), right end places new diaphragm；
(5) mode of externally threaded tooth portion alignment slotted nut (102) dextrorotation internal screw thread groove portion of right handed screw (103), will be right
It is internal to revolve screw rod (103) insertion slotted nut (102)；Rotary slotted nut (102) is to left-handed screw (101) and right handed screw
(103) it is engaged simultaneously with slotted nut (102)；
(6) wind tunnel experiment is carried out.
6. method according to claim 5, which is characterized in that further include before step (1) execution, by left-handed screw (101)
Left end flange is positioned with seam allowance and wind-tunnel shock tube, then is bolted；Right handed screw (103) right end flange is with seam allowance and wind
The diffuser of hole jet pipe positions, then is bolted.
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| CN201611118640.8A CN106840580B (en) | 2016-12-07 | 2016-12-07 | A kind of diaphragm positioning clamping device |
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| CN201611118640.8A CN106840580B (en) | 2016-12-07 | 2016-12-07 | A kind of diaphragm positioning clamping device |
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| CN105911215A (en) * | 2016-05-24 | 2016-08-31 | 中国人民解放军装备学院 | Pneumatic needle membrane piercing device for rectangular-section shockwave tube |
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| CN106840580A (en) | 2017-06-13 |
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