CN111579200B - Screw temperature control film clamping device - Google Patents
Screw temperature control film clamping device Download PDFInfo
- Publication number
- CN111579200B CN111579200B CN202010532714.2A CN202010532714A CN111579200B CN 111579200 B CN111579200 B CN 111579200B CN 202010532714 A CN202010532714 A CN 202010532714A CN 111579200 B CN111579200 B CN 111579200B
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- China
- Prior art keywords
- flange
- connecting screw
- heater
- clamping device
- membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000012528 membrane Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 239000000498 cooling water Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000010408 film Substances 0.000 description 31
- 230000007246 mechanism Effects 0.000 description 10
- 239000003921 oil Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/12—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using sliding jaws
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a screw temperature control film clamping device. The membrane clamping device comprises a left flange and a right flange which are arranged front and back, wherein a driving section is fixed at the left end of the left flange, a driven section is fixed at the right end of the right flange, a horizontally moving membrane I, a membrane clamping ring I, a membrane II and a membrane clamping ring II are sequentially fixed on a central axis between the left flange and the right flange, uniformly distributed connecting screws are fixed on the circumference between the left flange and the right flange, and symmetrical telescopic cylinders are also fixed between the left flange and the right flange; a cavity is formed in the central axis of the connecting screw, a heater is arranged in the cavity between the left flange and the right flange, a water cooling sleeve is sleeved outside the connecting screw at the position corresponding to the heater, and the heater is connected with an external power supply. The clamping device is simple, efficient and reliable, can provide enough clamping force for the diaphragms of shock tunnel type ground test equipment, and is particularly suitable for the conditions of large caliber of shock tubes, high pressure, high clamping force requirement and more measurement and control requirements at the clamping positions.
Description
Technical Field
The invention belongs to the technical field of hypersonic test equipment, and particularly relates to a screw temperature control film clamping device.
Background
Pulse test equipment such as shock tunnels is an essential key equipment for performing ultra-high-speed ground simulation tests. Such devices share a common feature: before the test, the shock tube is divided into a plurality of tube sections by using metal diaphragms, different tube sections are filled with gases with different pressures, and measures are taken to break the membranes during the test so as to complete the test. Therefore, it is necessary to design a device for ensuring the clamping seal of the diaphragm between different pipe sections of the shock tube, which is a diaphragm clamping mechanism.
The hydraulic cylinder film clamping mechanism, the cutting thread film clamping mechanism and the full thread film clamping mechanism are commonly used film clamping mechanisms. The hydraulic cylinder membrane clamping mechanism provides clamping force for the membrane in a mode of pressurizing the hydraulic cylinder, has the advantages of strong membrane thickness adaptability, small driving force conversion clamping force loss and the like, but because the provided clamping force depends on the area of a hydraulic cylinder piston and the pressure of hydraulic oil, the required clamping force is large for a shock tunnel with large caliber and high pressure, the hydraulic cylinder is large in size, the sealing design, the installation and the maintenance are difficult, the sealing failure risk is high, and the damage is serious. The film clamping principle of the broken thread film clamping mechanism is similar to that of the full thread film clamping mechanism, namely, different pipe sections are connected by adopting rotary nuts with positive and negative threads respectively processed at two ends, and an oil cylinder is arranged at the outer side of each rotary nut to drive the rotary nut to rotate forward or backward, so that the two pipe sections are close or separated to realize film clamping/loosening. The screw thread clamp film mechanism has the advantages of compact structure and high connection rigidity, but because the clamp film force is generated by screw thread pair rotation, screw thread engagement is easy to occur under the working condition of high clamp force load. In addition, the membrane clamping components of the thread membrane clamping mechanism are all positioned in the rotary nut, which is not beneficial to developing operations such as inflation and deflation, measurement and control and the like at the membrane clamping position.
Currently, there is a need to develop a new type of membrane-clamping device suitable for shock tunnels.
Disclosure of Invention
The invention aims to solve the technical problem of providing a screw temperature control film clamping device.
The invention relates to a screw temperature control film clamping device which is characterized by comprising a left flange and a right flange which are arranged front and back, wherein the centers of the left flange and the right flange are respectively provided with an internal threaded hole I, the circumference of the left flange is provided with an evenly distributed internal threaded hole II, and the circumference of the right flange is provided with a through hole corresponding to the internal threaded hole II;
the driving section is a cylinder I, an external thread is arranged at the right end of the cylinder I, the external thread of the driving section is assembled with an internal thread hole I of the left flange through threads, the driving section is fixed on the left end face of the left flange, and a cavity of the driving section is filled with high-pressure driving gas;
the driven section is a cylinder II, an external thread is arranged at the left end of the cylinder II, the external thread of the driven section is assembled with an internal thread hole I of the right flange through threads, the driven section is fixed on the right end face of the right flange, and a cavity of the driven section is filled with low-pressure driven gas;
a diaphragm I, a diaphragm clamping ring I, a diaphragm II and a diaphragm clamping ring II which horizontally move are sequentially fixed on the central axis between the right end face of the left flange and the left end face of the right flange from front to back; telescopic oil cylinders are symmetrically arranged between the right end face of the left flange and the left end face of the right flange;
the left end of the connecting screw rod is fixed on the left flange through the assembly of the external thread and the internal thread hole II, and the right end of the connecting screw rod is assembled with the fastening nut through the external thread and the right end of the connecting screw rod is fixed on the right flange;
a cavity is formed in the central axis of the connecting screw, a heater is arranged in the cavity between the right end face of the left flange and the left end face of the right flange, a water cooling sleeve is sleeved outside the connecting screw at the position corresponding to the heater, and the heater is connected with an external power supply.
Further, the water cooling jacket is a water cooling jacket, a water inlet and a water outlet are formed in the water cooling jacket, and cooling water is introduced into the water cooling jacket.
Further, the connecting screw rod is made of high-temperature high-strength steel.
Further, the heater is a rod heater.
Further, the membrane clamping ring I or the membrane clamping ring II is provided with an air charging hole and an air discharging hole.
Further, a measuring hole is formed in the clamping film ring I or the clamping film ring II, and a pressure sensor or a temperature sensor is arranged in the measuring hole.
The screw temperature control film clamping device has the following advantages:
1. the membrane pre-tightening force is generated by shrinkage deformation of the connecting screw, the sum of the tensile pre-stress of the connecting screw is the membrane clamping force, and the force conversion efficiency is high;
2. the structure is simple, the generated clamping force is large, the diameter of the connecting screw is 200mm, the connecting screw is made of high-temperature high-strength steel, the heating section of the connecting screw can generate elastic deformation of about 1.2% due to the temperature difference of 100 ℃, and 3.8X10 can be generated corresponding to each connecting screw according to the heating length which is half of the stretching length 7 Pretightening force of N;
3. the device is safe and reliable, after the membrane is clamped, all the connections are in threaded connection and have huge axial pretightening force, and all the connections cannot be loosened before the connection screw is heated again;
4. the fastening nut is fastened after the connecting screw is heated and stretched, and at this time, the fastening nut is basically unloaded, so that the fastening nut can be rotated very lightly.
The screw temperature control film clamping device is simple, efficient and reliable.
The screw temperature control membrane clamping device can provide enough clamping force for the membrane of shock tunnel type ground test equipment, and is particularly suitable for the conditions of large caliber of shock tube, high pressure, high clamping force requirement and more measurement and control requirements at the membrane clamping position.
Drawings
FIG. 1 is a schematic diagram of a screw temperature control membrane clamping device of the present invention;
fig. 2 is a schematic perspective view of a screw temperature control film clamping device of the present invention.
In the figure, 1, a driving section 2, a left flange 3, a water cooling jacket 4, a connecting screw 5, a heater 6, a fastening nut 7, a right flange 8, a diaphragm I9, a diaphragm clamping ring I10, a diaphragm II 11, a diaphragm clamping ring II 12, a telescopic oil cylinder 13 and a driven section.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1 and 2, the screw temperature-control film clamping device of the embodiment comprises a driving section 1, a left flange 2, a water cooling jacket 3, a connecting screw 4, a heater 5, a fastening nut 6, a right flange 7, a film piece i 8, a film clamping ring i 9, a film piece ii 10, a film clamping ring ii 11, a telescopic cylinder 12 and a driven section 13;
drive section 1: the shock tube is characterized in that an upstream tube section of the shock tube is provided with a cylindrical cavity, high-pressure driving gas is filled in the cavity during test, the right end of the driving section 1 is provided with external threads, and the external threads are in threaded connection with an internal threaded hole I in the center of the left flange 2;
left flange 2: the screw is arranged at the right end of the driving section 1 through threads, an internal threaded hole I is formed in the center, internal threaded holes II uniformly distributed along the center are formed in four corners, and the internal threaded holes II are used for installing a connecting screw 4;
diaphragm I8: the circular thin film piece is positioned at the downstream of the driving section 1 and is clamped by the driving section 1 and the film clamping ring I9;
clamping ring I9: the diaphragm I8 is positioned at the downstream of the diaphragm I8 and is cylindrical and used for bearing the split impact of the diaphragm I8 after being opened and accommodating the split of the diaphragm I8, and a plurality of holes are formed in the diaphragm clamping ring I9 for inflation, deflation and measurement;
diaphragm II 10: the circular film piece is positioned at the downstream of the film clamping ring I9 and is clamped by the film clamping ring I9 and the film clamping ring II 11;
clamp membrane ring II 11: the diaphragm II 10 is positioned at the downstream of the diaphragm II 10 and is cylindrical and used for bearing the split impact of the diaphragm II 10 after being opened and accommodating the split of the diaphragm II 10, and a plurality of holes are formed in the diaphragm clamping ring II 11 for inflation, deflation and measurement;
right flange 7: the connecting screw rod 4 is arranged at the left end of the driven section 13 through threads, an internal threaded hole I is formed in the center of the connecting screw rod, through holes corresponding to the internal threaded holes II of the left flange 2 are formed in four corners of the connecting screw rod, and the connecting screw rod 4 can penetrate through the through holes;
driven section 13: for the downstream pipeline section of shock tube, inside is cylindrical cavity, fills low pressure driven gas in the cavity during the test, is provided with the external screw thread by the left end of driven section 13, carries out threaded connection with the internal thread hole I of right flange 7.
And (4) connecting a screw 4: the number of the hollow studs with external threads at the two ends is 4; the left external screw thread of the connecting screw 4 is shorter and is arranged in the internal screw holes II at the four corners of the left flange 2, the right external screw thread of the connecting screw 4 is longer, passes through the through holes at the four corners of the right flange 7 and is connected with the fastening nut 6 through threads; a circular through hole is processed on the central axis of the connecting screw 4 and is used for installing a heater 5; the water cooling jacket 3 is arranged on the outer surface of the connecting screw 4 between the right end surface of the left flange 2 and the left end surface of the right flange 7;
water cooling jacket 3: the jacket is of a jacket structure, water inlets and water outlets are arranged on two sides of the jacket, and a cooling water flow channel is arranged in the jacket; the water cooling jacket 3 is arranged on the connecting screw 4 through transition fit, and the installation position basically corresponds to the position of the heater 5 and is used for rapidly cooling the heated connecting screw 4; the number of the water cooling jackets 3 is 4;
a heater 5: the surface of the connecting screw rod is insulated, the lead wire is positioned at the end, the heater 5 is arranged in a through hole of the central axis of the connecting screw rod 4 and is used for heating the connecting screw rod 4 to enable the connecting screw rod 4 to generate cold and hot deformation, and the heater 5 is positioned at the part of the connecting screw rod 4 between the right end face of the left flange 2 and the left end face of the right flange 7; the number of the heaters 5 is 4;
fastening nut 6: the left flange 2 and the right flange 7 are tensioned together with the connecting screw 4 by being arranged on the right side of the right flange 7 and the external thread at the right end of the connecting screw 4; the number is 4;
telescopic cylinder 12: the two ends are respectively fixed on the right end face of the left flange 2 and the left end face of the right flange 7 and used for controlling the separation and the closing of the left flange 2 and the right flange 7, the number of the two flanges is 2, and the two flanges are installed symmetrically up and down.
The specific working procedure of this embodiment is as follows:
a. the flow of cooling water in the water cooling jacket 3 is closed, the heater 5 is started to heat the connecting screw 4, the connecting screw 4 stretches axially, the fastening nut 6 is separated from the right end face of the right flange 7, the fastening nut 6 is loosened, and the loosening distance reaches the operating distance for clamping and disassembling the diaphragm I8 and the diaphragm II 10;
b. opening the telescopic oil cylinder 12, pushing the left flange 2 and the right flange 7 to deviate by the telescopic oil cylinder 12 until the right flange 7 is tightly propped against the fixed nut 6, and closing the telescopic oil cylinder 12;
c. removing the old diaphragm I8 and the old diaphragm II 10, and clamping the new diaphragm I8 and the new diaphragm II 10;
d. opening the telescopic oil cylinder 12, pulling the left flange 2 and the right flange 7 to be close by the telescopic oil cylinder 12, preliminarily clamping the diaphragm I8 and the diaphragm II 10, screwing the fastening nut 6, enabling the fastening nut 6 to prop against the right end face of the right flange 7, and closing the telescopic oil cylinder 12;
e. the temperature of the heater 5 is reduced, if necessary, the flow of cooling water in the water cooling jacket 3 is started, the cooling of the connecting screw 4 is accelerated, the connecting screw 4 axially contracts along with the reduction of the temperature of the connecting screw 4, the connecting screw 4 generates stretching prestress, and the pretightening force is provided for the new diaphragm I8 and the new diaphragm II 10 until the new diaphragm I8 and the new diaphragm II 10 are clamped.
The water cooling jacket in the embodiment is a water cooling jacket, a water inlet and a water outlet are formed in the water cooling jacket, and cooling water is introduced into the water cooling jacket.
The connecting screw in this embodiment is made of high-temperature high-strength steel.
The heater in this embodiment is a rod heater.
The membrane clamping ring I or the membrane clamping ring II in the embodiment is provided with an air charging hole and an air discharging hole.
The clamp film ring I or the clamp film ring II in the embodiment is provided with a measuring hole, and a pressure sensor or a temperature sensor is arranged in the measuring hole.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that numerous modifications and variations can be made without departing from the principles of the invention, and such modifications and variations are to be regarded as being within the scope of the invention.
Claims (6)
1. The screw temperature control film clamping device is characterized by comprising a left flange (2) and a right flange (7) which are arranged front and back, wherein the centers of the left flange (2) and the right flange (7) are respectively provided with an internal threaded hole I, the circumference of the left flange (2) is provided with an evenly distributed internal threaded hole II, and the circumference of the right flange (7) is provided with a through hole corresponding to the internal threaded hole II;
the driving section (1) is a cylinder I, an external thread is arranged at the right end of the cylinder I, the external thread of the driving section (1) is assembled with an internal thread hole I of the left flange (2) through threads, the driving section (1) is fixed on the left end face of the left flange (2), and a cavity of the driving section (1) is filled with high-pressure driving gas;
the driven section (13) is a cylinder II, an external thread is arranged at the left end of the cylinder II, the external thread of the driven section (13) is assembled with an internal thread hole I of the right flange (7) through threads, the driven section (13) is fixed on the right end face of the right flange (7), and a cavity of the driven section (13) is filled with low-pressure driven gas;
a diaphragm I (8), a diaphragm clamping ring I (9), a diaphragm II (10) and a diaphragm clamping ring II (11) which move horizontally are sequentially fixed on the central axis between the right end face of the left flange (2) and the left end face of the right flange (7) from front to back; a telescopic oil cylinder (12) is symmetrically arranged between the right end face of the left flange (2) and the left end face of the right flange (7);
the connecting screw rod (4) sequentially passes through the internal threaded hole II and the through hole from left to right, the left end of the connecting screw rod (4) is assembled with the internal threaded hole II through external threads, the left end of the connecting screw rod (4) is fixed on the left flange (2), the right end of the connecting screw rod (4) is assembled with the fastening nut (6) through external threads, and the right end of the connecting screw rod (4) is fixed on the right flange (7);
a cavity is formed in the central axis of the connecting screw rod (4), a heater (5) is arranged in the cavity between the right end face of the left flange (2) and the left end face of the right flange (7), a water cooling sleeve (3) is sleeved outside the connecting screw rod (4) at the position corresponding to the heater (5), and the heater (5) is connected with an external power supply.
2. The screw temperature control film clamping device according to claim 1, wherein the water cooling jacket (3) is a water cooling jacket, a water inlet and a water outlet are formed, and cooling water is introduced into the water cooling jacket (3).
3. The screw temperature control membrane clamping device according to claim 1, wherein the connecting screw (4) is made of high-temperature high-strength steel.
4. The screw temperature-control film clamping device according to claim 1, wherein the heater (5) is a rod heater.
5. The screw temperature control membrane clamping device according to claim 1, wherein the membrane clamping ring I (9) or the membrane clamping ring II (11) is provided with an air charging hole and an air discharging hole.
6. The screw temperature control membrane clamping device according to claim 1, wherein a measuring hole is formed in the membrane clamping ring I (9) or the membrane clamping ring II (11), and a pressure sensor or a temperature sensor is arranged in the measuring hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010532714.2A CN111579200B (en) | 2020-06-12 | 2020-06-12 | Screw temperature control film clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010532714.2A CN111579200B (en) | 2020-06-12 | 2020-06-12 | Screw temperature control film clamping device |
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| Publication Number | Publication Date |
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| CN111579200A CN111579200A (en) | 2020-08-25 |
| CN111579200B true CN111579200B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010532714.2A Active CN111579200B (en) | 2020-06-12 | 2020-06-12 | Screw temperature control film clamping device |
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| CN (1) | CN111579200B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179607B (en) * | 2020-09-30 | 2022-04-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | Wind tunnel diaphragm clamping device |
| CN113109014B (en) * | 2021-05-24 | 2022-04-15 | 中国空气动力研究与发展中心超高速空气动力研究所 | Wind tunnel hydraulic film clamping device |
| CN113432823B (en) * | 2021-06-22 | 2022-07-05 | 中国空气动力研究与发展中心超高速空气动力研究所 | Polyester film clamping device |
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| WO1993006796A2 (en) * | 1991-10-11 | 1993-04-15 | Family Health International | Stress-softened elastomeric films, articles, and method and apparatus for making such films and articles |
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2020
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| CN111579200A (en) | 2020-08-25 |
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