CN115265954A - Device and method for detecting air tightness of automobile turbine shell - Google Patents
Device and method for detecting air tightness of automobile turbine shell Download PDFInfo
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- CN115265954A CN115265954A CN202210882609.0A CN202210882609A CN115265954A CN 115265954 A CN115265954 A CN 115265954A CN 202210882609 A CN202210882609 A CN 202210882609A CN 115265954 A CN115265954 A CN 115265954A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2846—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for tubes
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Abstract
The invention belongs to the technical field of turbine detection, and particularly relates to an automobile turbine shell air tightness detection device and a detection method, which comprise a lower module; an electric cylinder is fixedly connected inside the lower module; a plurality of groups of first sliding rods are slidably connected inside the lower module; through the sealed lid of magnetism that sets up, sealing plug and No. two sealing plugs do not block up turbine shell's through-hole, the realization is sealed the direct pressure gas tightness of being convenient for to turbine shell and is detected, place turbine shell in the lower module, go up the module pressfitting and form airtight cavity on the module down, external air pump pressurization gets into in the airtight cavity, the realization detects the quick gas tightness of turbine shell, utilize the inside that the extrusion piece inserted sealed briquetting, and extrusion rubber slab and sealed cushion shrink deformation, module under the elastic component extrusion sealed briquetting pressfitting, improve the sealed effect to airtight cavity, utilize the gas vent of rubber ball jam air duct, reduce the gas reflux in the airtight cavity, the efficiency of a large amount of turbine shell detection is improved.
Description
Technical Field
The invention belongs to the technical field of turbine detection, and particularly relates to an automobile turbine shell air tightness detection device and method.
Background
The automobile turbine is a fan in an automobile engine, fuel steam is blown to the engine by utilizing exhaust gas, a shell of the automobile turbine is wrapped outside the turbine, the automobile turbine has good air tightness, and the air tightness of the turbine needs to be strictly controlled during production of the turbine shell.
The Chinese patent with the publication number of CN111442883B discloses a turbine air tightness detection device, which comprises a frame, be provided with transparent detection mouth in the frame, detection mouth one side is provided with angle detection mechanism, detection mouth opposite side is provided with clearance detection mechanism, be provided with the sensor under the detection mouth, still be provided with first fixed establishment in the frame, first fixed establishment one side is provided with second fixed establishment, first fixed establishment opposite side is provided with stop gear, and this patent simple operation can carry out the air tightness to turbine opening lid department and detect fast.
When the automobile turbine shell is produced, the air tightness of the automobile turbine shell needs to be detected, but the existing device for detecting the air tightness of the automobile turbine shell is complex in structure, poor in sealing effect, high in operation difficulty and low in detection efficiency in daily use.
Therefore, the invention provides a device and a method for detecting the air tightness of an automobile turbine shell.
Disclosure of Invention
To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an air tightness detection device for an automobile turbine shell, which comprises a lower module; an electric cylinder is fixedly connected inside the lower module; a plurality of groups of first sliding rods are slidably connected inside the lower module; the output end of the electric cylinder is fixedly connected with an upper module which is fixedly connected with the top ends of a plurality of groups of first sliding rods; the upper module is fixedly connected with an air duct; the inner side wall of the lower module is fixedly connected with a magnetic fixed seat; a magnetic sealing cover is arranged inside the magnetic fixing seat; the magnetic fixed seat and the magnetic sealing cover can attract each other in opposite polarities when approaching each other; a turbine shell is inserted into the side wall of the magnetic sealing cover; a first sealing plug is inserted into the inner side wall of the turbine shell; a second sealing plug is inserted into the inner side wall of the turbine shell; when the automobile turbine shell is produced, the air tightness detection is required to be carried out on the automobile turbine shell, but the structure of the device for detecting the air tightness of the automobile turbine shell at present is complex, the sealing effect is poor, the operation difficulty is high, the efficiency of detection is low in daily use, therefore, three openings of the turbine shell are respectively sealed by using a magnetic sealing cover, a sealing plug and a sealing plug are blocked, the sealed turbine shell is placed inside a lower module, the magnetic sealing cover and a magnetic fixing seat are magnetically attracted and clamped for limiting, the output end of an electric cylinder drives an upper module to slide downwards, three groups of first sliding rods are mutually matched and slide downwards, the upper module is pressed on the top end of the lower module to form a sealed cavity, the sealed cavity is filled with air and enters the air guide pipe, the sealed cavity is pressurized, the air tightness of the turbine shell is detected by using a direct-compression mode, the change of the internal pressure of the pressure is measured after the pressurization is finished, whether the air tightness of the product has a problem can be known, the air tightness of the turbine shell can be conveniently and the quick detection can be realized, and the operation is simple.
Preferably, the inner side wall of the upper module is connected with a plurality of groups of second sliding rods in a sliding manner; the bottom end of the second sliding rod is fixedly connected with a sealing pressing block; the side wall of the second sliding rod is sleeved with a first elastic piece; when last module pressfitting was on the top of module down, because last module and the easy gap that produces of lower module amalgamation to lead to the gaseous outside release of pressurization, so utilize sealed briquetting to extrude the lower module top earlier when last module gliding, no. two slide bars are extruded and slide the inside wall at last module, and sealed briquetting extrudees an elastic component atress shrink simultaneously, strengthens the sealed effect between module and the lower module.
Preferably, a limit groove is formed in the sealing pressing block; the inner side wall of the sealing pressing block is fixedly connected with a rubber plate; a sealing cushion is fixedly connected inside the sealing pressing block and is positioned in the limiting groove; a plurality of groups of extrusion blocks are fixedly connected to the top end of the lower module; the upper end of the extrusion block is elliptic, and the lower end of the extrusion block is arc-shaped; when a large amount of gases are pressed in between the lower die block and the upper die block, the gases are easy to leak more and more, so when the upper die block is pressed down, the sealing pressing block is driven to press at the extruding block, the extruding block extrudes the rubber plate to shrink towards the side wall, the rubber plate is tightly attached to the lower end position of the extruding block, the upper end of the extruding block is directly pushed against the sealing cushion to shrink, the sealing cushion is tightly attached to the upper end of the extruding block, and the sealing effect of the lower die block and the splicing part of the upper die block is further enhanced.
Preferably, the inner side wall of the upper module is connected with a plurality of groups of plugging blocks in a sliding manner; a lifting rope is fixedly connected to the bottom end of the plugging block; the side wall of the lifting rope is sleeved with a second elastic part; the bottom end of the lifting rope is fixedly connected with a rubber ball; when gas is pressed into the closed cavity from the gas guide tube, the gas is guided from the gas guide tube in order to reduce the gas, so that the sealing block slides on the inner side wall of the upper module, the sealing block is supported by the second elastic piece, the rubber ball at the bottom end of the lifting rope is pulled to seal the gas guide tube gas outlet, the effect of sealing the gas guide tube gas outlet is achieved, when the gas is filled into the closed cavity, the rubber ball is stamped, the sealing block at the other end of the lifting rope is pulled to slide by the rubber ball, the sealing block extrudes the second elastic piece to shrink the stress along with the sealing block, the gas is discharged into the closed cavity from the gap of the side wall of the rubber ball, the gas is stopped being filled until the external gas pump, the second elastic piece jacks up the sealing block to reset, and the gas guide tube gas outlet is sealed by the pulling of the rubber ball.
Preferably, a magnetic ball is fixedly connected inside the rubber ball; the bottom end of the upper module is fixedly connected with a magnetic block; the magnetic ball and the magnetic block can attract each other in opposite directions when approaching each other; when the rubber ball blockked up the gas vent of air duct, utilize inside magnetic ball of rubber ball and the mutual magnetism of magnetic path to inhale, further strengthen the shutoff effect to gas vent of air duct department, the gas vent of air duct is compared to the shape of magnetic path simultaneously more the lateral wall of laminating rubber ball, improves the inseparable effect of air-intake seal to the air duct.
Preferably, the upper module is internally provided with an air guide channel and a plugging block; an oil storage groove is formed in the upper module; the inside of the sealing pressing block is provided with a circulation hole which is communicated with the oil storage tank and the air guide channel; the inner side wall of the upper module is connected with a pressing plate in a sliding manner and is positioned in the oil storage tank; the bottom end of the pressing plate is fixedly connected with a third elastic part; the inner side wall of the sealing pressing block is fixedly connected with a rubber pull rope; the bottom end of the rubber pull rope is fixedly connected with a rubber block for blocking the oil storage tank; when the top of pressfitting module under is used for a long time to sealed briquetting, airtight effect is weakened gradually, so add oil in the oil storage groove, when adding gas in the cavity to module and last module down, the rubber ball is broken away by gas and is drawn the shutoff piece slip of dragging, some gas gets into in the oil storage groove from the air guide channel, the punching press clamp plate gliding, no. three elastic component atress shrink, to the oil extrusion of oil storage inslot, some oil is opened rubber shutoff piece punching press overflow, the tensile atress of rubber stay cord, the oil flows through the top of module and the bottom of sealed briquetting under that the through-hole overflows, utilize oil further reinforcing to the sealed effect in the cavity, when gaseous stopping adding simultaneously, no. three elastic component can reset the clamp plate jack-up, rubber stay cord also can draw the sealed oil storage groove of rubber shutoff piece, play the effect of self-adaptation control oil flow.
Preferably, the inner side wall of the sealing pressing block is connected with a magnetic sliding block in a sliding manner and is positioned at the through hole; the side wall of the magnetic sliding block is fixedly connected with a fourth elastic piece and is fixedly connected with the inner side wall of the sealing pressing block; the interior of the sealing cushion is fixedly connected with a flexible magnetic strip; the magnetic slider and the flexible magnetic strip can attract each other in opposite polarities when approaching each other; the inner side wall of the sealing pressing block is connected with a sponge block in a sliding manner; when a large amount of oil long-time storage is in the oil storage groove, the sealed cushion of extrusion piece extrusion shrink and warp, and extrude flexible magnetic stripe, flexible magnetic stripe and multiunit magnetic slide block magnetism attract each other, magnetic slide block slides and extrudes the shrink of No. four elastic components, the oil that underflows in the oil storage groove just can flow to the bottom of sealed briquetting, play the effect to the oil seal, the oil stream that underflows is absorbed on the sponge piece, utilize sponge piece absorption oil back hole can be attached to by oil and block up, strengthen the effect of airtight cavity, reduce the speed of volatilizing of oil simultaneously.
Preferably, the inner side wall of the air duct is fixedly connected with a fixing block; the top end of the fixed block is rotatably connected with a shunting block; when the air pump adds gas in to the air duct, in order to increase gaseous entering air guide channel, so utilize the reposition of redundant personnel piece to rotate and connect on the fixed block, and be located near the air guide channel, when gas flow to reposition of redundant personnel piece department, the reposition of redundant personnel piece can be blown and rotate, utilize the arc wall direction of fixed block with in the leading-in air guide channel of part gas, increase gaseous extrusion to the clamp plate, the hole groove has been seted up to the inside of reposition of redundant personnel piece simultaneously, part gas also can be followed the hole groove and insufflated in the airtight cavity.
The method is suitable for the device for detecting the air tightness of the automobile turbine shell, and is characterized in that: the method comprises the following steps;
s1: firstly, a magnetic sealing cover, a first sealing plug and a second sealing plug are used for respectively blocking and sealing a through hole of a turbine shell, the magnetic sealing cover at the bottom end of the turbine shell is placed on a magnetic fixing seat for fixing, an electric cylinder is used for driving an upper module to be pressed down to a lower module to seal the turbine shell, and an external air pump is communicated with an air guide pipe;
s2: then opening a valve externally connected with an air pump, directly pressing the air quantity of the qualified product into a closed cavity formed by splicing the upper module and the air guide pipe, recording the air pressing-in quantity and the pressing-in duration, and measuring the pressure in the closed cavity;
s3: then after the air volume of the qualified product is completely pressed in, plugging an air duct channel, monitoring the pressure change in the closed cavity, wherein the monitoring time is 1-2 minutes, the unqualified product is judged as if the difference between the monitoring pressure and the initial pressure is large, the unqualified product is pushed to a precise detection area for further detection, and the qualified product is judged as if the difference between the monitoring pressure and the initial pressure is small; through sealed through-hole one by one to turbine housing, be convenient for detect turbine housing vertical compression gas tightness, utilize the top of module pressfitting under, the airtight cavity of amalgamation, external air pump is to the air entrainment in the airtight cavity, record initial pressure and time long to contrast with monitoring pressure, can judge when the gap is too big whether qualified the product, if unqualifiedly can be once more accurate judgement, can detect a large amount of turbine housing gas tightness fast.
Preferably, the unqualified product is obtained when the monitoring pressure in the S3 is greater than the initial pressure by 0.05-0.2MPa, and the qualified product is obtained when the monitoring pressure is less than the initial pressure by 0.005-0.05 MPa; when the monitored pressure is more than the initial pressure, the product is regarded as an unqualified product, the product needs to be further precisely detected and confirmed and then judged again, the waste of resources is avoided, and if the monitored pressure is less than the initial pressure, the product is regarded as a qualified product, so that the airtightness of a large number of turbine shells can be conveniently and quickly detected.
The invention has the following beneficial effects:
1. according to the device and the method for detecting the air tightness of the automobile turbine shell, the through hole of the turbine shell is respectively blocked by the magnetic sealing cover, the first sealing plug and the second sealing plug, the turbine shell is sealed and convenient to detect the direct-pressure air tightness, the sealed turbine shell is placed in the lower module, the upper module is pressed on the lower module to form the sealed cavity, an external air pump is used for pressurizing the upper module to enter the sealed cavity, the turbine shell can be rapidly detected in the air tightness, the extrusion block is inserted into the sealed pressing block and extrudes the rubber plate and the sealing cushion to shrink and deform, the elastic piece is matched to extrude the sealed pressing block to be pressed on the top end of the lower module, the sealed cavity is further improved in sealing effect, the lifting rope is used for pulling the rubber ball to block the air outlet of the air guide pipe, the air backflow in the sealed cavity is reduced, and the efficiency of detecting a large number of turbine shells is improved.
2. According to the device and the method for detecting the air tightness of the automobile turbine shell, oil is added into the oil storage groove, when the rubber ball is stamped, part of gas enters the oil storage groove from the gas guide channel, the gas stamps the pressing plate to slide downwards, the oil is pressed into the position above the magnetic sliding block, the magnetic sliding block is attracted to slide by matching with the flexible magnetic strip, the oil flows onto the sponge block to be absorbed and stored, the sponge block attached with a large amount of oil is pressed at the bottom end of the sealing pressing block, the sealing effect on the sealed cavity is further improved, and the leakage of the internal gas is reduced.
3. According to the device and the method for detecting the air tightness of the automobile turbine shell, through sealing the turbine shell through the through holes one by one, the direct-pressure air tightness of the turbine shell can be conveniently detected, the upper module is pressed on the top end of the lower module to be spliced into the closed cavity, the air pump is externally connected to fill air into the closed cavity, the initial pressure and the duration are recorded and compared with the monitored pressure, whether the product is qualified or not can be judged when the difference is too large, and if the product is not qualified, accurate judgment can be carried out again, and the air tightness of a large number of turbine shells can be rapidly detected.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an enlarged view at A of FIG. 2;
FIG. 4 is an enlarged view at B of FIG. 3;
FIG. 5 is an enlarged view at C of FIG. 2;
FIG. 6 is a partial cross-sectional view of an airway tube according to the invention;
FIG. 7 is a flow chart of the method for detecting the air tightness of the turbine casing of the automobile according to the present invention.
In the figure: 1. a lower module; 11. an electric cylinder; 12. a first slide bar; 13. an upper module; 14. an air duct; 15. a magnetic fixing seat; 16. a magnetic seal cover; 17. a turbine housing; 18. a first sealing plug; 19. a second sealing plug; 2. a second sliding rod; 21. sealing and pressing the block; 22. a first elastic member; 3. a rubber plate; 31. sealing the soft cushion; 32. extruding the block; 4. a plugging block; 41. a second elastic member; 42. a lifting rope; 43. a rubber ball; 5. a magnetic ball; 51. a magnetic block; 6. pressing a plate; 61. a third elastic member; 62. a rubber pull rope; 63. a rubber block; 7. a magnetic slider; 71. a fourth elastic member; 72. a flexible magnetic strip; 73. a sponge block; 8. a fixed block; 81. and (6) a shunting block.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example one
As shown in fig. 1 to 2, an air-tightness detecting device for a turbine housing of an automobile according to an embodiment of the present invention includes a lower module 1; an electric cylinder 11 is fixedly connected inside the lower module 1; a plurality of groups of first sliding rods 12 are connected inside the lower module 1 in a sliding manner; the output end of the electric cylinder 11 is fixedly connected with an upper module 13, and the upper module 13 is fixedly connected with the top ends of a plurality of groups of first sliding rods 12; the upper module 13 is fixedly connected with an air duct 14; the inner side wall of the lower module 1 is fixedly connected with a magnetic fixed seat 15; a magnetic sealing cover 16 is arranged in the magnetic fixed seat 15; the magnetic fixed seat 15 and the magnetic sealing cover 16 can attract each other in opposite directions when approaching each other; a turbine shell 17 is inserted into the side wall of the magnetic sealing cover 16; a first sealing plug 18 is inserted into the inner side wall of the turbine shell 17; a second sealing plug 19 is inserted into the inner side wall of the turbine shell 17; when the automobile turbine shell is produced, the air tightness of the automobile turbine shell needs to be detected, but the existing device for detecting the air tightness of the automobile turbine shell is complex in structure, poor in sealing effect and high in operation difficulty, and the detection efficiency is low in daily use, so that three openings of the turbine shell 17 are respectively sealed by a magnetic sealing cover 16, a first sealing plug 18 and a second sealing plug 19, the sealed turbine shell 17 is placed in a lower module 1, the magnetic sealing cover 16 and a magnetic fixing seat 15 are magnetically attracted and limited in a clamping mode, the output end of an electric cylinder 11 drives an upper module 13 to slide downwards, three groups of first sliding rods 12 are matched with each other and slide downwards, the upper module 13 is pressed on the top end of the lower module 1 to form a sealed cavity, the sealed cavity is pressurized by entering the air guide pipe 14 through an external air pump, the air guide pipe is pressurized in the sealed cavity, the air tightness of the turbine shell 17 is detected in a direct pressure mode, and the change of the internal pressure is measured after the pressurization is completed, so that whether the air tightness of the product exists can be found, the air tightness of the product can be conveniently and the turbine shell 17 can be quickly detected, and the operation is simple.
As shown in fig. 2 to 3, the inner side wall of the upper module 13 is slidably connected with a plurality of sets of second sliding rods 2; the bottom end of the second sliding rod 2 is fixedly connected with a sealing pressing block 21; the side wall of the second sliding rod 2 is sleeved with a first elastic part 22; when the upper die block 13 is pressed on the top end of the lower die block 1, a gap is easily generated by the combination of the upper die block 13 and the lower die block 1, so that pressurized gas is released outwards, the top end of the lower die block 1 is firstly extruded when the upper die block 13 slides downwards by utilizing the sealing pressing block 21, the second sliding rod 2 is extruded and slides on the inner side wall of the upper die block 13, the sealing pressing block 21 simultaneously extrudes the first elastic piece 22 to be stressed and contracted, and the sealing effect between the upper die block 13 and the lower die block 1 is enhanced.
As shown in fig. 2 to 4, a limiting groove is formed inside the sealing pressing block 21; the inner side wall of the sealing pressing block 21 is fixedly connected with a rubber plate 3; a sealing cushion 31 is fixedly connected inside the sealing pressing block 21, and the sealing cushion 31 is positioned in the limiting groove; a plurality of groups of extrusion blocks 32 are fixedly connected to the top end of the lower module 1; the shape of the extrusion block 32 is elliptical at the upper end and arc at the lower end; when a large amount of gas is pressed between the lower die block 1 and the upper die block 13, because the more the gas, the easier the gas is leaked, when the upper die block 13 is pressed down, the sealing pressing block 21 is driven to be pressed at the position of the extruding block 32, the extruding block 32 extrudes the rubber plate 3 to shrink towards the side wall, the rubber plate 3 is tightly attached to the lower end position of the extruding block 32, the upper end of the extruding block 32 directly pushes up the sealing cushion 31 to shrink, the sealing cushion 31 is tightly attached to the upper end of the extruding block 32, and the sealing effect of the splicing part of the lower die block 1 and the upper die block 13 is further enhanced.
As shown in fig. 2 to 5, the inner side wall of the upper module 13 is slidably connected with a plurality of groups of plugging blocks 4; a lifting rope 42 is fixedly connected to the bottom end of the plugging block 4; the side wall of the lifting rope 42 is sleeved with a second elastic part 41; the bottom end of the lifting rope 42 is fixedly connected with a rubber ball 43; when gas is pressed into the closed cavity from the gas guide tube 14, in order to reduce the diversion of the gas from the gas guide tube 14, the blocking block 4 is used for sliding on the inner side wall of the upper module 13, the second elastic piece 41 is used for supporting the blocking block 4, the rubber ball 43 at the bottom end of the lifting rope 42 is pulled to block the gas outlet of the gas guide tube 14, the effect of blocking the gas outlet of the gas guide tube 14 is achieved, when gas enters the closed cavity, the gas presses the rubber ball 43, the rubber ball 43 pulls the blocking block 4 at the other end of the lifting rope 42 to slide, the blocking block 4 presses the second elastic piece 41 to contract and bear force, the gas is discharged into the closed cavity from the side wall gap of the rubber ball 43 until the external air pump stops gas filling, the second elastic piece 41 pushes the blocking block 4 to reset, and the rubber ball 43 is pulled to block the gas outlet of the gas guide tube 14.
The magnetic ball 5 is fixedly connected inside the rubber ball 43; the bottom end of the upper module 13 is fixedly connected with a magnetic block 51; the magnetic ball 5 and the magnetic block 51 can attract each other in opposite directions when approaching each other; when the rubber ball 43 blocks the exhaust port of the air duct 14, the magnetic ball 5 inside the rubber ball 43 and the magnetic block 51 are magnetically attracted with each other, so that the blocking effect on the exhaust port at the air duct 14 is further enhanced, and meanwhile, compared with the shape of the magnetic block 51, the exhaust port of the air duct 14 is more attached to the side wall of the rubber ball 43, so that the air inlet sealing effect on the air duct 14 is improved.
An air guide channel is arranged in the upper module 13 and is positioned at the plugging block 4; an oil storage groove is formed in the upper module 13; a circulation hole is formed in the sealing pressing block 21 and is communicated with the oil storage tank and the air guide channel; the inner side wall of the upper module 13 is connected with a pressing plate 6 in a sliding manner and is positioned in the oil storage tank; a third elastic part 61 is fixedly connected to the bottom end of the pressing plate 6; the inner side wall of the sealing press block 21 is fixedly connected with a rubber pull rope 62; the bottom end of the rubber pull rope 62 is fixedly connected with a rubber blocking block 63 for blocking the oil storage tank; when the sealed briquetting 21 uses the pressfitting on the top of module 1 down for a long time, airtight effect is weakened gradually, so with in the oil storage tank, when adding gas in the cavity to lower module 1 and last module 13, rubber ball 43 is opened by gas and is drawn and draw shutoff piece 4 slip, some gas gets into in the oil storage tank from the air guide channel, punching press clamp plate 6 gliding, no. three elastic component 61 atress shrink, to the oil extrusion in the oil storage tank, some oil is opened rubber shutoff piece 63 punching press and is overflowed, the tensile atress of rubber stay cord 62, oil flow through-hole overflow the top of module 1 and the bottom of sealed briquetting 21 down, utilize oil further to strengthen the sealed effect to the cavity, when gaseous stopping adding simultaneously, no. three elastic component 61 can push up clamp plate 6 and reset, rubber stay cord 62 also can draw the sealed oil storage tank of drawing rubber shutoff piece 63, play the effect of self-adaptation control oil flow.
The inner side wall of the sealing pressing block 21 is connected with the magnetic sliding block 7 in a sliding mode and is positioned at the through hole; a fourth elastic piece 71 is fixedly connected to the side wall of the magnetic slide block 7 and fixedly connected with the inner side wall of the sealing press block 21; a flexible magnetic strip 72 is fixedly connected inside the sealing cushion 31; the magnetic slider 7 and the flexible magnetic strip 72 can attract each other in opposite directions when being close to each other; the inner side wall of the sealing press block 21 is connected with a sponge block 73 in a sliding manner; when a large amount of oil long-time storage is in the oil storage groove, the sealed cushion 31 of extrusion piece 32 extrusion is out of shape, and extrude flexible magnetic stripe 72, flexible magnetic stripe 72 and the magnetism of multiunit magnetic slider 7 attract mutually, magnetic slider 7 slides and extrudes the shrink of number four elastic component 71, the oil that underflows in the oil storage groove just can flow to the bottom of sealed briquetting 21, play the effect sealed to the oil, the oil stream that underflows is absorbed on sponge piece 73, utilize sponge piece 73 to absorb behind the oil hole can be attached to by oil and block up, the effect of the airtight cavity of reinforcing, reduce the speed of volatilizing of oil simultaneously.
Example two
As shown in fig. 6, a first comparative example, in which another embodiment of the present invention is: a fixed block 8 is fixedly connected to the inner side wall of the air duct 14; the top end of the fixed block 8 is rotatably connected with a shunting block 81; when the air pump adds gas to the interior of air duct 14, in order to increase gas admission air guide channel, so utilize diverter block 81 to rotate and connect on fixed block 8, and be located near the air guide channel, when gas circulation to diverter block 81 department, diverter block 81 can be blown and rotate, utilize the arc wall direction of fixed block 8 with the leading-in air guide channel of part gas in, increase gas extrudees clamp plate 6, the hole groove has been seted up to diverter block 81's inside simultaneously, part gas also can be followed the hole groove and insufflated in the airtight cavity.
As shown in fig. 7, a method for detecting the air-tightness of a turbine housing of an automobile, which is applied to the device for detecting the air-tightness of a turbine housing of an automobile described above, comprises the following steps;
s1: firstly, a magnetic sealing cover 16, a first sealing plug 18 and a second sealing plug 19 are used for respectively blocking and sealing a through hole of a turbine shell 17, the magnetic sealing cover 16 at the bottom end of the turbine shell 17 is placed on a magnetic fixing seat 15 for fixing, an electric cylinder 11 is used for driving an upper module 13 to be pressed down to a lower module 1 for sealing the turbine shell 17, and an external air pump is communicated with an air guide pipe 14;
s2: then, opening a valve externally connected with an air pump, directly pressing the air quantity of the qualified product into a closed cavity formed by splicing the upper module 13 and the air guide tube 14, recording the air pressing-in quantity and the pressing-in duration, and measuring the pressure in the closed cavity;
s3: then after the air volume of the qualified product is completely pressed in, plugging a channel of the air duct 14, monitoring the pressure change in the closed cavity, wherein the monitoring time is 1-2 minutes, the unqualified product is obtained by pushing the unqualified product to a precise detection area for further detection when the difference between the monitoring pressure and the initial pressure is large, and the qualified product is obtained by pushing the unqualified product to the precise detection area when the difference between the monitoring pressure and the initial pressure is small; through sealed through-hole one by one to turbine housing 17, be convenient for detect turbine housing 17 vertical compression gas tightness, utilize the top of last module 13 pressfitting module 1 down, the amalgamation becomes airtight cavity, external air pump is to the air entrainment in the airtight cavity, record initial pressure and length to compare with monitoring pressure, can judge whether qualified product when the gap is too big, if unqualified can be once more accurate judgement, can detect a large amount of turbine housing 17 gas tightness fast.
The unqualified product is obtained when the monitoring pressure in the S3 is greater than the initial pressure and is 0.05-0.2MPa, and the qualified product is obtained when the monitoring pressure is less than the initial pressure and is 0.005-0.05 MPa; when the monitored pressure is more than the initial pressure, the product is regarded as an unqualified product, and the product needs to be judged again after further precision detection and confirmation, so that the waste of resources is avoided, and if the monitored pressure is less than the initial pressure, the product is regarded as a qualified product, so that the air tightness of a large number of turbine shells 17 can be conveniently and quickly detected.
The working principle is that when the automobile turbine shell is produced, the air tightness of the automobile turbine shell needs to be detected, but the existing device for detecting the air tightness of the automobile turbine shell is complex in structure, poor in sealing effect and high in operation difficulty, and low in detection efficiency in daily use, so that three openings of the turbine shell 17 are respectively blocked by using a magnetic sealing cover 16, a first sealing plug 18 and a second sealing plug 19, the sealed turbine shell 17 is placed inside a lower module 1, the magnetic sealing cover 16 and a magnetic fixing seat 15 are magnetically attracted, limited and clamped, the output end of an electric cylinder 11 drives an upper module 13 to slide downwards, three sets of first sliding rods 12 are matched with each other to slide downwards, the upper module 13 is pressed on the top end of the lower module 1 to form a sealed cavity, air is filled into an air guide tube 14 through an external air pump, the sealed cavity is pressurized, the air tightness of the turbine shell 17 is detected in a direct-pressure mode, and the change of the internal pressure is measured after pressurization is completed, so that whether the air tightness of a product exists can be found out, the air tightness can be convenient and quick detection of the turbine shell 17, and the operation is simple; when the upper module 13 is pressed on the top end of the lower module 1, a gap is easily generated by the combination of the upper module 13 and the lower module 1, so that pressurized gas is released outwards, when the upper module 13 slides downwards, the sealing pressing block 21 is firstly used for extruding the top end of the lower module 1, the second sliding rod 2 is extruded and slides on the inner side wall of the upper module 13, the sealing pressing block 21 simultaneously extrudes the first elastic piece 22 to be stressed and contracted, and the sealing effect between the upper module 13 and the lower module 1 is enhanced; when a large amount of gas is pressed between the lower die block 1 and the upper die block 13, the gas is easy to leak when the gas is more, so when the upper die block 13 is pressed downwards, the sealing pressing block 21 is driven to be pressed at the position of the extrusion block 32, the extrusion block 32 extrudes the rubber plate 3 to shrink towards the side wall, the rubber plate 3 is tightly attached to the lower end position of the extrusion block 32, the upper end of the extrusion block 32 is directly propped against the sealing cushion 31 to shrink, the sealing cushion 31 is tightly attached to the upper end of the extrusion block 32, and the sealing effect of the joint of the lower die block 1 and the upper die block 13 is further enhanced; when gas is pressed into the closed cavity from the gas guide tube 14, in order to reduce the diversion of the gas from the gas guide tube 14, the blocking block 4 slides on the inner side wall of the upper module 13, the second elastic piece 41 is used for supporting the blocking block 4, the rubber ball 43 at the bottom end of the lifting rope 42 is pulled to block the gas outlet of the gas guide tube 14, so that the effect of blocking the gas outlet of the gas guide tube 14 is achieved, when gas is aerated and enters the closed cavity, the gas presses the rubber ball 43, the rubber ball 43 pulls the blocking block 4 at the other end of the lifting rope 42 to slide, the blocking block 4 presses the second elastic piece 41 to contract and bear force, the gas is discharged into the closed cavity from the gap of the side wall of the rubber ball 43 until the external air pump stops aerating, the second elastic piece 41 pushes the blocking block 4 to reset, and the rubber ball 43 is pulled to block the gas outlet of the gas guide tube 14; when the rubber ball 43 blocks the exhaust port of the air duct 14, the magnetic ball 5 and the magnetic block 51 in the rubber ball 43 are mutually magnetically attracted, so that the blocking effect on the exhaust port at the air duct 14 is further enhanced, and meanwhile, compared with the shape of the exhaust port of the air duct 14, the magnetic block 51 is more attached to the side wall of the rubber ball 43, so that the air inlet sealing effect on the air duct 14 is improved; when the sealing press block 21 is pressed on the top end of the lower module 1 for a long time, the sealing effect is gradually weakened, so that oil is added into the oil storage tank, when gas is added into the cavities of the lower module 1 and the upper module 13, the rubber ball 43 is flushed by gas to pull the sealing block 4 to slide, part of the gas enters the oil storage tank from the gas guide channel, the stamping press plate 6 slides downwards, the third elastic piece 61 is stressed and contracted to extrude the oil in the oil storage tank, part of the oil stamps the rubber block 63 to overflow, the rubber pull rope 62 is stretched to bear force, the oil flows through the through hole to overflow the top end of the lower module 1 and the bottom of the sealing press block 21, the sealing effect in the cavity is further enhanced by using the oil, meanwhile, when the gas stops adding, the third elastic piece 61 can jack up and reset the press plate 6, and the rubber pull rope 62 can pull the rubber block 63 to seal the oil storage tank, and the function of adaptively controlling the oil flow is achieved; when a large amount of oil is stored in the oil storage tank for a long time, the extrusion block 32 extrudes the sealing cushion 31 to shrink and deform, and extrudes the flexible magnetic strip 72, the flexible magnetic strip 72 and the multiple groups of magnetic slide blocks 7 are magnetically attracted, the magnetic slide blocks 7 slide and extrude the number four elastic pieces 71 to shrink, the oil underflowing in the oil storage tank can flow to the bottom end of the sealing press block 21 to play a role in sealing the oil, the oil flow underflowing is absorbed on the sponge block 73, holes can be blocked by the oil after the sponge block 73 absorbs the oil, the effect of sealing a cavity is enhanced, and the volatilization speed of the oil is reduced; when the air pump adds gas to the interior of air duct 14, in order to increase gas admission air guide channel, so utilize diverter block 81 to rotate and connect on fixed block 8, and be located near the air guide channel, when gas circulation to diverter block 81 department, diverter block 81 can be blown and rotate, utilize the arc wall direction of fixed block 8 with the leading-in air guide channel of part gas in, increase gas extrudees clamp plate 6, the hole groove has been seted up to diverter block 81's inside simultaneously, part gas also can be followed the hole groove and insufflated in the airtight cavity.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an automobile turbine casing gas tightness detection device which characterized in that: comprises a lower module (1); an electric cylinder (11) is fixedly connected inside the lower module (1); a plurality of groups of first sliding rods (12) are connected inside the lower module (1) in a sliding manner; the output end of the electric cylinder (11) is fixedly connected with an upper module (13), and the upper module (13) is fixedly connected with the top ends of a plurality of groups of first sliding rods (12); the upper module (13) is fixedly connected with an air duct (14); the inner side wall of the lower module (1) is fixedly connected with a magnetic fixed seat (15); a magnetic sealing cover (16) is arranged inside the magnetic fixed seat (15); the magnetic fixed seat (15) and the magnetic sealing cover (16) can attract each other in opposite directions when approaching each other; a turbine shell (17) is inserted into the side wall of the magnetic sealing cover (16); a first sealing plug (18) is inserted into the inner side wall of the turbine shell (17); and a second sealing plug (19) is inserted into the inner side wall of the turbine shell (17).
2. The device for detecting the airtightness of the turbine housing of an automobile according to claim 1, wherein: the inner side wall of the upper module (13) is connected with a plurality of groups of second sliding rods (2) in a sliding manner; the bottom end of the second sliding rod (2) is fixedly connected with a sealing pressing block (21); the side wall of the second sliding rod (2) is sleeved with a first elastic piece (22).
3. The air-tightness detecting device for the turbine casing of the automobile according to claim 2, wherein: a limiting groove is formed in the sealing pressing block (21); the inner side wall of the sealing pressing block (21) is fixedly connected with a rubber plate (3); a sealing cushion (31) is fixedly connected inside the sealing pressing block (21), and the sealing cushion (31) is positioned in the limiting groove; a plurality of groups of extrusion blocks (32) are fixedly connected to the top end of the lower module (1); the shape of the extrusion block (32) is elliptical at the upper end and arc at the lower end.
4. The device for detecting the airtightness of the turbine housing of an automobile according to claim 3, wherein: the inner side wall of the upper module (13) is connected with a plurality of groups of plugging blocks (4) in a sliding manner; the bottom end of the plugging block (4) is fixedly connected with a lifting rope (42); a second elastic piece (41) is sleeved on the side wall of the lifting rope (42); the bottom end of the lifting rope (42) is fixedly connected with a rubber ball (43).
5. The device for detecting the airtightness of the turbine housing of an automobile according to claim 4, wherein: a magnetic ball (5) is fixedly connected inside the rubber ball (43); the bottom end of the upper module (13) is fixedly connected with a magnetic block (51); the magnetic ball (5) and the magnetic block (51) can attract each other in opposite directions when approaching each other.
6. The device for detecting the airtightness of the turbine housing of an automobile according to claim 5, wherein: an air guide channel is arranged in the upper module (13), and the air guide channel is arranged at the plugging block (4); an oil storage groove is formed in the upper module (13); a circulation hole is formed in the sealing pressing block (21) and is communicated with the oil storage tank and the air guide channel; the inner side wall of the upper module (13) is connected with a pressure plate (6) in a sliding manner and is positioned in the oil storage tank; a third elastic part (61) is fixedly connected to the bottom end of the pressing plate (6); a rubber pull rope (62) is fixedly connected to the inner side wall of the sealing press block (21); the bottom end of the rubber pull rope (62) is fixedly connected with a rubber block (63) for blocking the oil storage tank.
7. The air-tightness detecting device for the turbine casing of the automobile according to claim 6, wherein: the inner side wall of the sealing pressing block (21) is connected with a magnetic sliding block (7) in a sliding mode and is positioned at the through hole; a fourth elastic piece (71) is fixedly connected to the side wall of the magnetic sliding block (7) and is fixedly connected with the inner side wall of the sealing pressing block (21); a flexible magnetic strip (72) is fixedly connected inside the sealing cushion (31); the magnetic slider (7) and the flexible magnetic strip (72) can attract each other in opposite directions when being close to each other; the inner side wall of the sealing pressing block (21) is connected with a sponge block (73) in a sliding mode.
8. The air-tightness detecting device for the turbine casing of the automobile according to claim 7, wherein: the inner side wall of the air duct (14) is fixedly connected with a fixed block (8); the top end of the fixed block (8) is rotatably connected with a shunting block (81).
9. A method for detecting an air-tightness of a turbine housing of an automobile, which is applied to the apparatus for detecting an air-tightness of a turbine housing of an automobile according to any one of claims 1 to 8, wherein: the method comprises the following steps;
s1: firstly, a magnetic sealing cover (16), a first sealing plug (18) and a second sealing plug (19) are used for respectively blocking and sealing a through hole of a turbine shell (17), the magnetic sealing cover (16) at the bottom end of the turbine shell (17) is placed on a magnetic fixing seat (15) for fixing, an electric cylinder (11) is used for driving an upper module (13) to be pressed down to a lower module (1) for sealing the turbine shell (17), and an external air pump is communicated with an air guide pipe (14);
s2: then, a valve externally connected with an air pump is opened, the air quantity of qualified products is directly pressed into a closed cavity formed by splicing an upper module (13) and an air guide pipe (14), the air pressing-in quantity and the pressing-in duration are recorded, and the pressure in the closed cavity is measured;
s3: and then after the air volume of the qualified product is completely pressed in, blocking the channel of the air duct (14), monitoring the pressure change in the closed cavity, wherein the monitoring time is 1-2 minutes, the unqualified product is judged as if the difference between the monitoring pressure and the initial pressure is large, the unqualified product is pushed to a precision detection area for further detection, and the qualified product is judged as if the difference between the monitoring pressure and the initial pressure is small.
10. The method for detecting the airtightness of the turbine housing of an automobile according to claim 9, wherein: and the unqualified product is obtained when the monitoring pressure in the S3 is greater than the initial pressure by 0.05-0.2MPa, and the qualified product is obtained when the monitoring pressure is less than the initial pressure by 0.005-0.05 MPa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118219499A (en) * | 2024-04-15 | 2024-06-21 | 江苏万恒新材料科技有限公司 | Valve body shell forming die and process thereof |
| CN118443236A (en) * | 2024-04-28 | 2024-08-06 | 深圳市希立仪器设备有限公司 | Air tightness detection device |
| CN118443236B (en) * | 2024-04-28 | 2024-10-25 | 深圳市希立仪器设备有限公司 | Air tightness detection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333550A (en) * | 2006-06-15 | 2007-12-27 | Eito Syst Kk | Leakage inspection apparatus and inspection method for housing or like |
| CN111442883A (en) * | 2020-05-26 | 2020-07-24 | 无锡金百特自动化机械有限公司 | Turbine air tightness detection device |
| CN215178445U (en) * | 2021-06-07 | 2021-12-14 | 重庆时彩机电设备有限公司 | Automobile lamp detection device |
| CN215217976U (en) * | 2021-06-02 | 2021-12-17 | 无锡正杰机械科技有限公司 | Turbine shell air tightness testing fixture |
| CN114486082A (en) * | 2021-12-29 | 2022-05-13 | 西峡县内燃机进排气管有限责任公司 | Air tightness detection device of turbocharger shell |
| CN114754946A (en) * | 2022-05-07 | 2022-07-15 | 无锡吉冈精密科技股份有限公司 | New energy automobile turns to motor casing gas tightness testing arrangement |
| CN114778011A (en) * | 2022-06-16 | 2022-07-22 | 浙江华朔科技股份有限公司 | Plugging mechanism for double-cavity shell steam inspection tool |
-
2022
- 2022-07-26 CN CN202210882609.0A patent/CN115265954B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333550A (en) * | 2006-06-15 | 2007-12-27 | Eito Syst Kk | Leakage inspection apparatus and inspection method for housing or like |
| CN111442883A (en) * | 2020-05-26 | 2020-07-24 | 无锡金百特自动化机械有限公司 | Turbine air tightness detection device |
| CN215217976U (en) * | 2021-06-02 | 2021-12-17 | 无锡正杰机械科技有限公司 | Turbine shell air tightness testing fixture |
| CN215178445U (en) * | 2021-06-07 | 2021-12-14 | 重庆时彩机电设备有限公司 | Automobile lamp detection device |
| CN114486082A (en) * | 2021-12-29 | 2022-05-13 | 西峡县内燃机进排气管有限责任公司 | Air tightness detection device of turbocharger shell |
| CN114754946A (en) * | 2022-05-07 | 2022-07-15 | 无锡吉冈精密科技股份有限公司 | New energy automobile turns to motor casing gas tightness testing arrangement |
| CN114778011A (en) * | 2022-06-16 | 2022-07-22 | 浙江华朔科技股份有限公司 | Plugging mechanism for double-cavity shell steam inspection tool |
Non-Patent Citations (1)
| Title |
|---|
| 区灿辉;: "涡轮增压器的结构原理和故障分析", 《科技资讯》, no. 17, pages 132 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118219499A (en) * | 2024-04-15 | 2024-06-21 | 江苏万恒新材料科技有限公司 | Valve body shell forming die and process thereof |
| CN118219499B (en) * | 2024-04-15 | 2024-08-23 | 江苏万恒新材料科技有限公司 | Valve body shell forming die and process thereof |
| CN118443236A (en) * | 2024-04-28 | 2024-08-06 | 深圳市希立仪器设备有限公司 | Air tightness detection device |
| CN118443236B (en) * | 2024-04-28 | 2024-10-25 | 深圳市希立仪器设备有限公司 | Air tightness detection device |
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