CN103790670A - Pressure-limiting air relief auxiliary brake valve device with end face seal ring - Google Patents
Pressure-limiting air relief auxiliary brake valve device with end face seal ring Download PDFInfo
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- CN103790670A CN103790670A CN201410032465.5A CN201410032465A CN103790670A CN 103790670 A CN103790670 A CN 103790670A CN 201410032465 A CN201410032465 A CN 201410032465A CN 103790670 A CN103790670 A CN 103790670A
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Abstract
The invention relates to a pressure-limiting air relief auxiliary brake valve device with an end face seal ring. The pressure-limiting air relief auxiliary brake valve device comprises a valve body, a butterfly piece, a supporting device, a pressure regulating device and a pressure relief port device, wherein the valve body is provided with a fixing through hole, a driving shaft penetrates the fixing through hole of the valve body to fix the butterfly piece in the valve body, a fixing gap and a supporting groove are respectively formed in the butterfly piece, the pressure regulating device comprises a piston tappet rod, the piston tappet rod comprises a column body and the end face seal ring, the column body is inserted into the supporting device, the end face seal ring is located between the supporting device and the supporting groove and driven to move by different air pressures transferred by the pressure relief port device. The pressure-limiting air relief auxiliary brake valve device further comprises a seal spring for adjusting the position of the end face seal ring portion. The pressure-limiting air relief auxiliary brake valve device is compact in structure, effectively controls a movement stroke of the piston tappet rod, improves an exhaust back pressure value of a large engine at medium-low speed, ensures small resistance when the piston tappet rod performs reciprocating motion and prevents the inside spring from being invalid due to high temperature, and the service life of the auxiliary brake valve device is prolonged.
Description
Technical field
The present invention relates to a kind of complemental brake system, the piston tappet that is specifically related to a kind of ancillary brake valve of large engine vehicle has the disappointing auxiliary braking control valve unit of pressure limiting of end face sealing ring.
Background technique
The disappointing auxiliary braking control valve unit of pressure limiting is a kind of complemental brake system of vehicle, be specially adapted to commerial vehicle, greatly the frequency of utilization of the minimizing Service Brake of degree, just can be controlled at vehicle within the scope of certain safety speed, prevention car brakeing is malfunctioning, guarantees traffic safety.
The disappointing auxiliary braking control valve unit of pressure limiting of prior art, to rely on cylinder or vacuum servo cylinder push-and-pull driving shaft deflection and make the deflection of butterfly sheet, driving shaft is fixed with rivet after inserting in butterfly sheet, the strength of driving shaft deflection acts on rivet, rivet bears very large oppressive force and is easily out of shape fracture, and butterfly sheet cannot be realized its effective exercise.
China Patent No. 200710137250.X and 200810126049.6 discloses a kind of exhaust brake, comprising valve body, butterfly sheet, strut, supporting sleeve, reduction valve, spring and adjusting screw, design is in the time that pressure exceedes setting value, discharge in time unnecessary pressure, guarantee the stable of working pressure, but reduction valve is in the time regulating pressure to open, can cause hot gas to surround spring, very high temperature easily causes spring failure; And reduction valve, pressing plate and adjusting screw be all without navigation designing, to combine unstablely, pressing plate skew makes adjusting screw can not adjust suitable pressure; In addition, pressing plate and reduction valve easily rotate to form spring torsion and cause spring breakage inefficacy.
Also have, China Patent No. 200710137249.7 and 200810126050.9 discloses a kind of exhaust brake of adjustable working pressure, comprising valve body, butterfly sheet, strut, supporting sleeve, controlling rod, spring and adjusting screw, design is in the time that pressure exceedes setting value, discharge in time unnecessary pressure, guarantee the stable of working pressure, but wherein controlling rod is subject to the pushing of air pressure side-thrust, cause the deflection of controlling rod, frictional force is large easily forms clamping stagnation, and causes pressurized plane and valve body anti-other; The residing space of spring is not provided with regulator hole, and the back pressure in cannot discriminant space, can not accurately adjust pressure; And air pressure feedback channel is easily stopped up by the impurity in hot gas, form the situation that pressure regulation has some setbacks; In addition, pressing plate is without navigation designing, and the combination of pressing plate and spring is unstable, and pressing plate skew makes adjusting screw can not adjust suitable pressure.
Plug screw on the regulator of prior art and the housing of regulator are full-closed structure.When butterfly sheet is closed, when engine exhaust enters the air-inlet cavity of valve body, a part of gas inevitably enters in the housing of regulator, and the to-and-fro motion of tappet is caused to obstruction, cannot Effective Regulation exhaust back pressure.Meanwhile, because the temperature of engine exhaust is very high, the structure of sealing causes regulator housing inner chamber to dispel the heat, and continuous high temperature can make the temperature distortion of pressure limiting spring, even loses efficacy, and the braking action of ancillary brake valve seriously lags behind, and sensitivity reduces greatly.Number of patent application 201210410571.3 has proposed a kind of auxiliary braking control valve unit being connected with atmosphere, having solved housing inner chamber cannot dispel the heat, continuous high temperature makes the problem of pressure limiting spring temperature distortion, but in the application of large motor, still there is the problem that sealing is bad, impact force affects, cannot discharge in time, therefore, there are some technical problems anxious to be resolved in the pressure limiting of the prior art auxiliary braking control valve unit that loses heart, in the application of large motor.
Summary of the invention
For above-mentioned defect, the object of this invention is to provide a kind of simple, efficient auxiliary braking control valve unit, to solve the technical problem of prior art.
For achieving the above object, the present invention has adopted following technological scheme:
The disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring, comprises a valve body, offers a fixed via on described valve body; One butterfly sheet, driving shaft is fixed on described butterfly sheet in body cavity through the fixed via of described valve body, and described butterfly sheet is respectively arranged with a fixed gap and a brace groove on the relative two edges by the center of circle; One support device, described support device is fixed on described butterfly sheet in body cavity in conjunction with described driving shaft; One regulator, described regulator is arranged on described valve body, in order to regulate pressure; One pressure relief opening device, described pressure relief opening device is arranged on described butterfly sheet, be connected to drain gas with described regulator, described pressure relief opening device comprises: the first pressure relief opening and the second pressure relief opening, described regulator comprises a piston tappet, described piston tappet comprises a cylinder and an end face sealing ring, and one end of described end face sealing ring and described cylinder is connected; Described cylinder is a cylindrical body, and described end face sealing ring is a circular lamellar body, described cylinder and described end face sealing ring is one-body molded makes; Described cylinder is plugged in described support device, and described end face sealing ring protrudes out in described brace groove, and described end face sealing ring, between described support device and described brace groove, is accepted described pressure relief opening device and transmitted different air pressure and move; Described regulator also comprises a Packing spring, and one end of described Packing spring is connected with described end face sealing ring, and one end is connected with described support device in addition.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, on described valve body, also offer a supported hole, described supported hole is positioned on the valve body of described fixed via relative position, and described supported hole and described fixed via are concentric; The described brace groove of described butterfly sheet is a circular cascade groove; Described support device comprises a guide pin bushing and a back-up ring, and described guide pin bushing is a cylindrical body, and described guide pin bushing is fixedly connected in the supported hole of described valve body, and described guide pin bushing protrudes out described body cavity, and corresponding inserted is in the brace groove of described butterfly sheet; Described back-up ring is an O type spring ring; On the hole wall of the supported hole of described valve body, offer a support concave ring groove, described back-up ring is assemblied in described support concave ring groove; One side of described back-up ring is connected with described guide pin bushing.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, the circle of the described brace groove of described butterfly sheet is stepped, outer genesis by described butterfly sheet is respectively the first ladder, the second ladder and the 3rd ladder, the internal diameter of described the first ladder is greater than the internal diameter of described the second ladder, the internal diameter of described the second ladder is greater than the internal diameter of described the 3rd ladder, the internal diameter of described the first ladder is greater than the external diameter of described guide pin bushing, described the first pressure relief opening is positioned on the cell wall of described brace groove of a side of the air-inlet cavity of described butterfly sheet, be positioned at the place of described the 3rd ladder, described the second pressure relief opening is positioned on the cell wall of described brace groove of a side of the exhaust cavity of described butterfly sheet, is positioned at the place of described the first ladder, and the passage between described the first pressure relief opening and described the second pressure relief opening is in a zigzag.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, the circle of the described brace groove of described butterfly sheet is stepped, be respectively the first ladder and the second ladder by the outer genesis of described butterfly sheet, the internal diameter of described the first ladder is greater than the internal diameter of described the second ladder, the internal diameter of described the first ladder is greater than the external diameter of described guide pin bushing, described the first pressure relief opening is positioned on the cell wall of described brace groove of a side of the air-inlet cavity of described butterfly sheet, is positioned at the place of described the second ladder; Described the second pressure relief opening is positioned on the cell wall of described brace groove of a side of the exhaust cavity of described butterfly sheet, is positioned at the place of described the first ladder, and the passage between described the first pressure relief opening and described the second pressure relief opening is in a zigzag.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, described driving shaft offers one by fixed groove and 2 milling limits in the center of circle through one end of described fixed via, the width of described fixed groove is greater than the thickness of fixed gap bottom butterfly sheet, distance in the middle of described 2 milling limits is less than the width of described fixed gap, and described fixed gap is fixedly connected with described butterfly sheet and described driving shaft with rivet after inserting described fixed groove.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, described regulator also comprises: a regulator housing, described regulator housing is arranged on the outer wall of described supported hole of described valve body, described regulator housing is a cylindrical body, described regulator housing is concentric with described supported hole, the internal diameter of described regulator housing is greater than the internal diameter of described supported hole, described regulator housing is attacked and is provided with internal thread away from one end of described supported hole, described regulator housing is attacked the internal diameter of establishing female one end and is greater than the other end and does not attack the internal diameter of establishing internal thread, described regulator housing is attacked and is established female place and offer a tightening through hole, described regulator housing offers tool withdrawal groove in the position, boundary of attacking internal thread and not attacking internal thread, offer at least one vent in the radial direction of tool withdrawal groove, one piston sleeve, described piston sleeve is a circular goblet, and described piston sleeve is placed in described regulator housing, and the other end of described piston tappet is connected with the cup end outside one side contact of described piston sleeve, one inner spring, described inner spring is placed in described regulator housing, and one end of described inner spring is connected with the cup end inner side one side contact of described piston sleeve, one plug screw, described plug screw is a goblet, the other end of described inner spring is connected with the cup end inner side one side contact of described plug screw, described plug screw is attacked and is provided with outside thread near the one end at the cup end, described plug screw and described regulator housing are spirally connected, and one end of described plug screw rim of a cup offers at least one breach, one Cock screw, described Cock screw screws in the described tightening through hole of described regulator housing.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, the outer wall of the cup of described piston sleeve is circular arc, and the external diameter of described piston sleeve is less than described regulator housing and does not attack the internal diameter of establishing internal thread one end.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, described plug screw cup offers at least one vent on bottom surface.
According to the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring described in the embodiment of the present invention, it is characterized in that, described the first pressure relief opening and described the second pressure relief opening are long strip through hole, the two ends of described long strip through hole are circular arc.
Owing to having adopted above technical characteristics, make the present invention than prior art, there is following advantage and good effect:
The first, the present invention is simple and compact for structure, and position and the movement travel of the effective control piston tappet of Packing spring reduce exhaust gas leakage, has guaranteed the usability of the disappointing auxiliary braking control valve unit of pressure limiting;
The second, the present invention guarantees the effective exercise of butterfly sheet, and the fitted seal of butterfly sheet and regulator is good, the exhaust back pressure value while improving low speed in motor;
Three, the vent that many places are offered; guarantee pressure limiting the unobstructed of regulator housing inner chamber in auxiliary braking control valve unit and atmosphere that lose heart; resistance while guaranteeing the to-and-fro motion of piston tappet is little; Effective Regulation engine exhaust back pressure in time heat radiation, prevent inner spring Yin Gaowen and lost efficacy and allow longer service life.
Certainly, implement any one specific embodiment of content of the present invention, might not there is above whole technique effect simultaneously.
Accompanying drawing explanation
Fig. 1 is ancillary brake valve schematic diagram of the present invention;
Fig. 2 is valve body schematic top plan view of the present invention;
Fig. 3 is butterfly sheet schematic diagram of the present invention;
Fig. 4 is driving shaft schematic diagram of the present invention;
Fig. 5 is valve body cut-away diagram of the present invention;
Fig. 6 is butterfly sheet cut-away diagram of the present invention;
Fig. 7 is guide pin bushing schematic diagram of the present invention;
Fig. 8 is plug screw schematic diagram of the present invention;
Fig. 9 is piston tappet schematic diagram of the present invention;
Figure 10 is piston sleeve schematic diagram of the present invention;
Figure 11 is another butterfly sheet schematic diagram of the present invention;
Figure 12 is another butterfly sheet cut-away diagram of the present invention;
Figure 13 is the part enlarged view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, several preferred embodiments of the present invention are described in detail, but the present invention is not restricted to these embodiments.The present invention contain any in marrow of the present invention and scope, make substitute, modification, equivalent method and scheme.In order to make the public that the present invention is had thoroughly and be understood, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have for a person skilled in the art the description of these details also can understand the present invention completely.In addition, for fear of essence of the present invention is caused to unnecessary obscuring, do not describe well-known method, process, flow process, element etc. in detail.
Please refer to Fig. 1 ancillary brake valve schematic diagram of the present invention, ancillary brake valve is mainly made up of the disappointing auxiliary braking control valve unit 3 of cylinder 1, operating device 2 and connected pressure limiting.The pressure limiting auxiliary braking control valve unit 3 that loses heart, comprises a valve body 31, a butterfly sheet 32, a support device 33, a regulator 34 and a pressure relief opening device 35, please also refer to Fig. 2, offers a fixed via 311 on described valve body 31, driving shaft 21 is fixed on described butterfly sheet 32 in valve body 31 inner chambers through the fixed via 311 of described valve body 31, support device 33 is fixed on described butterfly sheet 32 in valve body 31 inner chambers in conjunction with driving shaft 21, described regulator 34 is arranged on described valve body 31, in order to regulate pressure, and described pressure relief opening device 35 is arranged on described butterfly sheet 32, be connected to drain gas with described regulator 34, in addition, please also refer to Fig. 3 and Fig. 4, offer a fixed gap 321 at the edge of described butterfly sheet 32, described driving shaft 21 offers one by 211 and 2 milling limit (not shown) of fixed groove in the center of circle through one end of described fixed via 311, the width of described fixed groove 211 is greater than the thickness of fixed gap 321 bottom butterfly sheets, distance in the middle of described 2 milling limits is less than the width of described fixed gap 321, described fixed gap 321 is fixedly connected with described butterfly sheet 32 and described driving shaft 21 with rivet after inserting described fixed groove 211, thus, described fixed gap 321 is inserted after described fixed groove 211, engaging with fixed groove 211 and fixed gap 321, also has the engaging of 2 milling limits and two parallel inner faces of fixed gap 321, namely double card is closed and is added that rivet is fixedly connected with to support the motion that is connected of described driving shaft 21 and described butterfly sheet 32, such combination is more firm.
In addition, please also refer to Fig. 1, Fig. 3, Fig. 5, Fig. 6, Fig. 7 and Figure 13, on described valve body 31, also offer a supported hole 312, described supported hole 312 is positioned on the valve body 31 of described fixed via 311 relative positions, and described supported hole 312 and described fixed via 311 are concentric; And offering a brace groove 322 at described butterfly sheet 32 with respect to one side of described fixed gap 321, described brace groove 322 is a kind of circular cascade groove; Described support device 33 comprises guide pin bushing 331 and a back-up ring 332 of a cylindrical body in the present embodiment, described guide pin bushing 331 is fixed in the supported hole 312 of described valve body 31, described guide pin bushing 331 protrudes out described valve body 31 inner chambers, and corresponding inserted is in the brace groove 322 of described butterfly sheet 32;
Described back-up ring 332 is an O type spring ring; On the hole wall of the supported hole 312 of described valve body, offer a support concave ring groove 3121, described back-up ring 332 is assemblied in described support concave ring groove 3121; One side of described back-up ring 332 is connected with described guide pin bushing 331, by the position that is fixed on setting firm guide pin bushing 331, can not be subject to that piston tappet moves, the impact of impact force and produce displacement.
In addition, please refer to Fig. 1, described regulator 34 comprises: a regulator housing 341, one piston tappet 342, one piston sleeve 343, one inner spring 344, one plug screw 345, one Cock screw 346 and a Packing spring 348, described regulator housing 341 is arranged on the outer wall of described supported hole 312 of described valve body 31, described regulator housing 341 and described valve body 31 are made of one piece in the present embodiment, described regulator housing 341 is a cylindrical body, described regulator housing 341 is concentric with described supported hole 312, the internal diameter of described regulator housing 341 is greater than the internal diameter of described supported hole 312, described regulator housing 341 has been attacked internal thread away from one end of described supported hole 312, the internal diameter that described regulator housing 341 is attacked female one end is greater than the other end does not attack the internal diameter of internal thread, described regulator housing 341 is attacked female place and is offered a tightening through hole 347, described Cock screw 346 screws in the described tightening through hole 347 of described regulator housing 341, and described plug screw 345 is stuck in described regulator housing 341 tightly, described piston tappet 342 comprises a cylinder 3422 and an end face sealing ring 3421, and described end face sealing ring 3421 is connected with one end of described cylinder 3422,
Described cylinder 3422 is cylindrical bodys, and described end face sealing ring 3421 is a circular lamellar body, described cylinder 3422 and described end face sealing ring 3421 is one-body molded makes, described cylinder 3422 is plugged in described guide pin bushing 331, the end face sealing ring 3421 of cylinder 3422 one end protrudes out in described brace groove 322, one end of Packing spring 348 is connected with described end face sealing ring 3421, one end is connected with described support device 33 in addition, Packing spring 348 has played pooling feature between end face sealing ring 3421 and support device 33, and both can direct collision, Packing spring 348 is compressive state, and end face sealing ring 3421 is contacted to connection with brace groove 322, the external diameter of the cylinder 3422 of described piston tappet 342 is less than the internal diameter of described guide pin bushing 331, and described piston sleeve 343 to be circular goblets be placed in described regulator housing 341, the other end of the cylinder 3422 of described piston tappet 342 is connected with the cup end outside one side contact of described piston sleeve 343, in addition, described inner spring 344 is placed in described regulator housing 341, one end of described inner spring 344 is connected with the cup end inner side one side contact of described piston sleeve 343, the other end of described inner spring 344 is connected with the cup end inner side one side contact of described plug screw 345, in order to guarantee that described plug screw 345 can not cause the torsion of described inner spring 344, can on the surface of contact of described plug screw 345 and described inner spring 344, coat high temperature grease, or the roughness that guarantees surface of contact is below Ra3.2, in addition, described plug screw 345 is a round aecidioid body, described plug screw 345 near glass at the bottom of one end attacked outside thread, described plug screw 345 is spirally connected with described regulator housing 341, one end of described plug screw 345 rims of a cup offers at least one breach 3451, in the present embodiment, the quantity of breach is 2 but can not be used for limiting this patent, described regulator housing 341 offers tool withdrawal groove in the position, boundary of attacking internal thread and not attacking internal thread, offer at least one vent 3411 in the radial direction of tool withdrawal groove, in the present embodiment, the quantity of vent 3411 is 2 but can not be used for limiting this patent.
In addition, please refer to Fig. 6, the described brace groove 322 of described butterfly sheet 32 is circular cascade groove, be respectively the first ladder 3221, the second ladder 3222 and the 3rd ladder 3223 by the outer genesis of described butterfly sheet 32, the internal diameter of described the first ladder 3221 is greater than the internal diameter of described the second ladder 3222, and the internal diameter of described the second ladder 3222 is greater than the internal diameter of described the 3rd ladder 3223; The internal diameter of described the first ladder 3221 is greater than the external diameter of described guide pin bushing 331, described guide pin bushing 331 is plugged in the place of the first ladder 3221 described in the brace groove 322 of described butterfly sheet 32, the inwall of the first ladder 3221 smooth-going trackslipping on described guide pin bushing 331 when described butterfly sheet 32 rotates; When described piston tappet 342 pressurizeds move back and forth, the end face sealing ring 3421 of described piston tappet 342 is movable between described the first ladder 3221 and described guide pin bushing 331.Further, the circular cascade groove of described brace groove 322, also can be designed to more than three ladders, for example, set up the 0th ladder in the first ladder extension, allows described guide pin bushing 331 be inserted in the place of described the 0th ladder.
In addition, please refer to Fig. 6 and Fig. 9, described pressure relief opening device 35 comprises: the first pressure relief opening 351 and the second pressure relief opening 352, and described the first pressure relief opening 351 is positioned on the cell wall of described brace groove 322 of a side of the air-inlet cavity of described butterfly sheet 32, is positioned at the place of described the 3rd ladder 3223; Described the second pressure relief opening 352 is positioned on the cell wall of described brace groove 322 of a side of the exhaust cavity of described butterfly sheet 32, be positioned at the place of described the first ladder 3221, passage between described the first pressure relief opening 351 and described the second pressure relief opening 352 is in a zigzag, passage can not produce lateral force in a zigzag, and butterfly sheet more stability is better; In the time that air pressure does not reach setting pressure, the end face sealing ring 3421 of described piston tappet 342 is at described the first ladder 3221 places, when air pressure raises gradually, gas is exerted pressure to described piston tappet 342 by described the first pressure relief opening 351, described piston tappet 342 is moved towards the direction of described regulator housing 341, when the end face sealing ring 3421 of described piston tappet 342 moves to the place of described the second pressure relief opening 352, gas is smooth and easy enters exhaust cavity by described the second pressure relief opening 352, and the pressure of air-inlet cavity is releived.
Another mode of execution of the present invention, please refer to Fig. 9, Figure 11 and Figure 12, the circle of the described brace groove 322 of described butterfly sheet is stepped, be respectively the first ladder 3224 and the second ladder 3225 by the outer genesis of described butterfly sheet, the internal diameter of described the first ladder 3224 is greater than the internal diameter of described the second ladder 3225, the internal diameter of described the first ladder 3224 is greater than the external diameter of described guide pin bushing 331, described the first pressure relief opening 351 is positioned on the cell wall of described brace groove 322 of a side of the air-inlet cavity of described butterfly sheet, is positioned at the place of described the second ladder 3225; Described the second pressure relief opening 352 is positioned on the cell wall of described brace groove 322 of a side of the exhaust cavity of described butterfly sheet, be positioned at the place of described the first ladder 3224, passage between described the first pressure relief opening 351 and described the second pressure relief opening 352 is in a zigzag, passage can not produce lateral force in a zigzag, and butterfly sheet more stability is better.Described guide pin bushing 331 is plugged in the place of the first ladder 3224 described in the brace groove 322 of described butterfly sheet 32, the inwall of the first ladder 3224 smooth-going trackslipping on described guide pin bushing 331 when described butterfly sheet 32 rotates; When described piston tappet 342 pressurizeds move back and forth, the end face sealing ring 3421 of described piston tappet 342 is movable between described the first ladder 3224 and described guide pin bushing 331.In the time that air pressure does not reach setting pressure, the end face sealing ring 3421 of described piston tappet 342 is at described the first ladder 3224 places, when air pressure raises gradually, gas is exerted pressure to described piston tappet 342 by described the first pressure relief opening 351, described piston tappet 342 is moved towards the direction of described regulator housing 341, when the end face sealing ring 3421 of described piston tappet 342 moves to the place of described the second pressure relief opening 352, gas is smooth and easy enters exhaust cavity by described the second pressure relief opening 352, and the pressure of air-inlet cavity is releived.
In addition, please refer to Fig. 9, it is an end face sealing ring 3421 that described piston tappet 342 inserts the one end protruding out in described brace groove 322 after described guide pin bushing 331, end face can be more firm contact with brace groove 322, and when accepting gas pressure and moving, can be more steady, move more smooth and easy longer service life.
In addition, please refer to Figure 10, the outer wall of the cup of described piston sleeve 343 is circular arc, the external diameter of described piston sleeve 343 is less than the internal diameter that described regulator housing 341 is not attacked internal thread one end, when described piston sleeve 343 moves in described regulator housing 341, cause the skew of described piston sleeve 343 via the gas penetrating between described piston tappet 342 and described guide pin bushing 331, the outer wall of described piston sleeve 343 circular arcs makes skew more smooth, also makes the gas penetrating flow more smoothly.
Also have, described piston sleeve 343 and described piston tappet 342 contact the wherein a kind of shape that the one side being connected presents plane or groove, the present embodiment is to be used as example with the shape of groove, namely at the bottom of 343 glasss of described piston sleeves, the one side in outside is inwardly recessed, in the time that gas causes the skew of described piston sleeve 343, described piston tappet 342 and described piston sleeve 343 still can be stable connection, can not affect the performance of described regulator 34, described piston tappet 342 contacts with described piston sleeve 343 one side being connected can be designed to circular arc, when skew, described piston tappet 342 contacts more stable with described piston sleeve 343.
In addition, please refer to Fig. 8, described plug screw offers at least one vent 3452 on 345 glasss of bottom surfaces, in the present embodiment, the quantity of vent 3452 is 2, but can not be used for limiting this patent, when butterfly sheet 32 is closed, when engine exhaust enters the air-inlet cavity of valve body 31, part gas inevitably enters in the housing of regulator 34, because the temperature of engine exhaust is very high, continuous high temperature can make inner spring 344 temperature distortions, even lost efficacy, the braking action of ancillary brake valve is lagged behind, sensitivity, so offering vent 3452 can be discharged rapidly to the gas penetrating in atmosphere, can not affect the performance of described regulator 34.
Also have, described the first pressure relief opening 351 and described the second pressure relief opening 352 are long strip through hole, the two ends of described long strip through hole are circular arc, square design easily leaves stress and breach at corner, because the temperature of engine exhaust is very high, continuous high temperature can make square pressure relief opening produce slight crack, reduces working life, and the design of circular arc does not just have the misgivings of this respect.
In sum, owing to having adopted above technical characteristics, make the present invention there is following advantage and good effect than prior art:
The first, the present invention is simple and compact for structure, and position and the movement travel of the effective control piston tappet of Packing spring reduce exhaust gas leakage, has guaranteed the usability of the disappointing auxiliary braking control valve unit of pressure limiting;
The second, the present invention guarantees the effective exercise of butterfly sheet, and the fitted seal of butterfly sheet and regulator is good, the exhaust back pressure value while improving low speed in motor;
Three, the vent that many places are offered; guarantee pressure limiting the unobstructed of regulator housing inner chamber in auxiliary braking control valve unit and atmosphere that lose heart; resistance while guaranteeing the to-and-fro motion of piston tappet is little; Effective Regulation engine exhaust back pressure in time heat radiation, prevent inner spring Yin Gaowen and lost efficacy and allow longer service life.
Invention preferred embodiment is just for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, and also not limiting this invention is only described embodiment.Obviously,, according to the content of this specification, can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to explain better principle of the present invention and practical application, thereby under making, technical field technician can utilize the present invention well.The present invention is only subject to the restriction of claims and four corner and equivalent.Disclosed is above only preferred embodiment of the present invention; but be not used for limiting itself; anyly have the knack of those skilled in the art without prejudice to spiritual connotation of the present invention in the situation that, the equalization of doing changes and changes, and all should drop in protection scope of the present invention.
Claims (9)
1. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring, comprises a valve body, offers a fixed via on described valve body; One butterfly sheet, driving shaft is fixed on described butterfly sheet in body cavity through the fixed via of described valve body, and described butterfly sheet is respectively arranged with a fixed gap and a brace groove on the relative two edges by the center of circle; One support device, described support device is fixed on described butterfly sheet in body cavity in conjunction with described driving shaft; One regulator, described regulator is arranged on described valve body, in order to regulate pressure; One pressure relief opening device, described pressure relief opening device is arranged on described butterfly sheet, is connected to drain gas with described regulator, and described pressure relief opening device comprises: the first pressure relief opening and the second pressure relief opening,
It is characterized in that, described regulator comprises a piston tappet, and described piston tappet comprises a cylinder and an end face sealing ring, and one end of described end face sealing ring and described cylinder is connected;
Described cylinder is a cylindrical body,
Described end face sealing ring is a circular lamellar body, described cylinder and described end face sealing ring is one-body molded makes;
Described cylinder is plugged in described support device, and described end face sealing ring protrudes out in described brace groove, and described end face sealing ring, between described support device and described brace groove, is accepted described pressure relief opening device and transmitted different air pressure and move;
Described regulator also comprises a Packing spring, and one end of described Packing spring is connected with described end face sealing ring, and one end is connected with described support device in addition.
2. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 1, it is characterized in that, on described valve body, also offer a supported hole, described supported hole is positioned on the valve body of described fixed via relative position, and described supported hole and described fixed via are concentric; The described brace groove of described butterfly sheet is a circular cascade groove; Described support device comprises a guide pin bushing and a back-up ring, and described guide pin bushing is a cylindrical body, and described guide pin bushing is fixedly connected in the supported hole of described valve body, and described guide pin bushing protrudes out described body cavity, and corresponding inserted is in the brace groove of described butterfly sheet;
Described back-up ring is an O type spring ring; On the hole wall of the supported hole of described valve body, offer a support concave ring groove, described back-up ring is assemblied in described support concave ring groove; One side of described back-up ring is connected with described guide pin bushing.
3. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 2, it is characterized in that, the circle of the described brace groove of described butterfly sheet is stepped, outer genesis by described butterfly sheet is respectively the first ladder, the second ladder and the 3rd ladder, the internal diameter of described the first ladder is greater than the internal diameter of described the second ladder, the internal diameter of described the second ladder is greater than the internal diameter of described the 3rd ladder, the internal diameter of described the first ladder is greater than the external diameter of described guide pin bushing, described the first pressure relief opening is positioned on the cell wall of described brace groove of a side of the air-inlet cavity of described butterfly sheet, be positioned at the place of described the 3rd ladder, described the second pressure relief opening is positioned on the cell wall of described brace groove of a side of the exhaust cavity of described butterfly sheet, is positioned at the place of described the first ladder, and the passage between described the first pressure relief opening and described the second pressure relief opening is in a zigzag.
4. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 2, it is characterized in that, the circle of the described brace groove of described butterfly sheet is stepped, be respectively the first ladder and the second ladder by the outer genesis of described butterfly sheet, the internal diameter of described the first ladder is greater than the internal diameter of described the second ladder, the internal diameter of described the first ladder is greater than the external diameter of described guide pin bushing, described the first pressure relief opening is positioned on the cell wall of described brace groove of a side of the air-inlet cavity of described butterfly sheet, is positioned at the place of described the second ladder; Described the second pressure relief opening is positioned on the cell wall of described brace groove of a side of the exhaust cavity of described butterfly sheet, is positioned at the place of described the first ladder, and the passage between described the first pressure relief opening and described the second pressure relief opening is in a zigzag.
5. the disappointing auxiliary braking control valve unit of the pressure limiting that has end face sealing ring as described in claim 3 or 4, it is characterized in that, described driving shaft offers one by fixed groove and 2 milling limits in the center of circle through one end of described fixed via, the width of described fixed groove is greater than the thickness of fixed gap bottom butterfly sheet, distance in the middle of described 2 milling limits is less than the width of described fixed gap, and described fixed gap is fixedly connected with described butterfly sheet and described driving shaft with rivet after inserting described fixed groove.
6. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 5, is characterized in that, described regulator also comprises:
One regulator housing, described regulator housing is arranged on the outer wall of described supported hole of described valve body, described regulator housing is a cylindrical body, described regulator housing is concentric with described supported hole, the internal diameter of described regulator housing is greater than the internal diameter of described supported hole, described regulator housing is attacked and is provided with internal thread away from one end of described supported hole, described regulator housing is attacked the internal diameter of establishing female one end and is greater than the other end and does not attack the internal diameter of establishing internal thread, described regulator housing is attacked and is established female place and offer a tightening through hole, described regulator housing offers tool withdrawal groove in the position, boundary of attacking internal thread and not attacking internal thread, offer at least one vent in the radial direction of tool withdrawal groove,
One piston sleeve, described piston sleeve is a circular goblet, and described piston sleeve is placed in described regulator housing, and the other end of described piston tappet is connected with the cup end outside one side contact of described piston sleeve;
One inner spring, described inner spring is placed in described regulator housing, and one end of described inner spring is connected with the cup end inner side one side contact of described piston sleeve;
One plug screw, described plug screw is a goblet, the other end of described inner spring is connected with the cup end inner side one side contact of described plug screw, described plug screw is attacked and is provided with outside thread near the one end at the cup end, described plug screw and described regulator housing are spirally connected, and one end of described plug screw rim of a cup offers at least one breach;
One Cock screw, described Cock screw screws in the described tightening through hole of described regulator housing.
7. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 6, it is characterized in that, the outer wall of the cup of described piston sleeve is circular arc, and the external diameter of described piston sleeve is less than described regulator housing and does not attack the internal diameter of establishing internal thread one end.
8. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 7, is characterized in that, described plug screw cup offers at least one vent on bottom surface.
9. the disappointing auxiliary braking control valve unit of pressure limiting that has end face sealing ring as claimed in claim 8, is characterized in that, described the first pressure relief opening and described the second pressure relief opening are long strip through hole, and the two ends of described long strip through hole are circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032465.5A CN103790670B (en) | 2014-01-24 | 2014-01-24 | Pressure-limiting air relief auxiliary brake valve device with end face seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032465.5A CN103790670B (en) | 2014-01-24 | 2014-01-24 | Pressure-limiting air relief auxiliary brake valve device with end face seal ring |
Publications (2)
| Publication Number | Publication Date |
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| CN103790670A true CN103790670A (en) | 2014-05-14 |
| CN103790670B CN103790670B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410032465.5A Active CN103790670B (en) | 2014-01-24 | 2014-01-24 | Pressure-limiting air relief auxiliary brake valve device with end face seal ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911292A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | Constant-pressure electromagnetic exhaust brake valve |
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Cited By (1)
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| CN111911292A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | Constant-pressure electromagnetic exhaust brake valve |
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| CN103790670B (en) | 2017-02-01 |
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