CN112298236B - Vehicle door sealing structure and optimal design method - Google Patents
Vehicle door sealing structure and optimal design method Download PDFInfo
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- CN112298236B CN112298236B CN202011266927.1A CN202011266927A CN112298236B CN 112298236 B CN112298236 B CN 112298236B CN 202011266927 A CN202011266927 A CN 202011266927A CN 112298236 B CN112298236 B CN 112298236B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D19/00—Door arrangements specially adapted for rail vehicles
- B61D19/02—Door arrangements specially adapted for rail vehicles for carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J10/00—Sealing arrangements
- B60J10/20—Sealing arrangements characterised by the shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J10/00—Sealing arrangements
- B60J10/30—Sealing arrangements characterised by the fastening means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J10/00—Sealing arrangements
- B60J10/80—Sealing arrangements specially adapted for opening panels, e.g. doors
- B60J10/86—Sealing arrangements specially adapted for opening panels, e.g. doors arranged on the opening panel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Seal Device For Vehicle (AREA)
Abstract
The invention discloses a vehicle door sealing structure and an optimized design method, comprising a sealing element arranged at the bottom of a vehicle door, wherein the sealing element is matched with a sealing surface on a vehicle body to realize the sealing between the bottom of the vehicle door and the vehicle body; the seal includes: the sealing retainer meets the set hardness requirement, the bottom of the sealing retainer is provided with an inward cambered surface in the length direction, and the cambered surface is matched with a bulge on a sealing surface of a vehicle body; and laying a soft sealing layer on the cambered surface, wherein the soft sealing layer can enable the cambered surface to be in close coupling contact with the protrusions. The vehicle door sealing structure can reduce the transmission of external noise into a passenger room space, improve the comfort of passengers, effectively prevent dust, rainwater and the like from corroding the vehicle door and parts nearby the vehicle door, and prolong the service life of the vehicle door.
Description
Technical Field
The invention relates to the technical field of rail vehicle door sealing, in particular to a door sealing structure and an optimal design method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The rail vehicle door is one of important parts of a vehicle, and has the main functions of providing a passenger access passage and simultaneously having the functions of sound insulation, dust prevention, water seepage prevention and the like. The existing railway vehicle door mainly has a single door and a double door, and the sealing performance and the service life of the double door are more difficult to guarantee. It is well known that the sealing performance of a rail vehicle door is not only related to the door body structure, but more importantly to the mounting mating contact of the door and the vehicle body. The car door main body framework is generally formed by stamping the whole sheet metal part in a punching mode, sound insulation and noise reduction are carried out by adopting a sandwich structure, the sealing performance of the car door main body framework can be effectively guaranteed, and therefore the whole sealing performance of the car door is mainly determined by the matching contact of the car door and a car body.
In order to ensure the sealing performance of the matching contact between the vehicle door and the vehicle body, sealing parts are generally arranged around the vehicle door and/or the vehicle body, the sealing parts are required to be conveniently subjected to injection molding, have certain elasticity and proper hardness, have small compression permanent deformation, are not easy to decompose and age, and can keep a good sealing state for a long time. The sealing element is prepared by taking ethylene propylene diene monomer as a main raw material and adding corresponding filler, and the comprehensive performance of the rubber material can basically meet the requirement of the existing vehicle door on the service performance of the sealing element, but the stress state of the sealing element is unstable due to the problems of reasonable matching of the design section and installation matching of the sealing element at the periphery of the vehicle door and the service environment of the vehicle door, so that the sealing performance and the service life of the vehicle door are greatly reduced, and the sealing element is mainly expressed in the following aspects:
(1) current two door bottom surface sealing members that open of vehicle adopt L type cross-section, and L type cross-section bottom is trapezium structure, the top atress that leads to the door to close back bottom sealing member is the most unfavorable, and the boss metal strip on terminal surface and the automobile body floor before the sealing member is only compression contact, lack necessary horizontal restraint condition, thereby lead to the sealing member atress uneven when receiving the automobile body vibration, the sealing member sways inside and outside or takes place single direction extrusion bending back along with the automobile body vibration, sealing member fatigue aging accelerates, influence the life of sealing member, thereby lead to needing to change the sealing member many times, influence vehicle operation duration and increase material replacement cost.
(2) The sealing effect is weakened due to unilateral deformation and vibration of the sealing elements on the bottom surface and the side surface of the car door under the extrusion effect, a gap exists between the car door and the car door or a car body, the sound insulation performance of the car door is degraded, noise such as external environment, running of car equipment, vibration and the like is transmitted through the gap, noise in the car is increased, and the riding comfort of passengers is affected.
(3) When a gap exists between the vehicle door and the vehicle body, external corrosive media such as rainwater, dust and the like easily enter the passenger room and related equipment nearby, so that the corrosion and aging speed of the equipment is accelerated, the normal use function of the product is seriously influenced, and the driving safety is damaged.
Disclosure of Invention
In view of this, the invention provides a vehicle door sealing structure and an optimized design method, which improve the sealing performance and the service life of a vehicle door by improving the stress state of the vehicle door and a sealing element.
According to a first aspect of the embodiments of the present invention, there is provided a vehicle door sealing structure, including a sealing member disposed at a bottom of a vehicle door, the sealing member cooperating with a sealing surface on a vehicle body to seal the bottom of the vehicle door with the vehicle body; the seal includes: the sealing retainer meets the set hardness requirement, the bottom of the sealing retainer is provided with an inward cambered surface in the length direction, and the cambered surface is matched with a bulge on a sealing surface of a vehicle body; and laying a soft sealing layer on the cambered surface, wherein the soft sealing layer can enable the cambered surface to be in close coupling contact with the protrusions.
According to a second aspect of the embodiments of the present invention, there is provided a vehicle door sealing structure, including at least one piece of sealing member provided on opposite side surfaces of two side doors, respectively; the seal includes: the sealing retainer meets the set hardness requirement, the first side surface of the sealing retainer is an S-shaped cambered surface in the length direction, and a soft sealing layer is laid on the concave cambered surface of the S-shaped cambered surface; when the vehicle door is in a closed state, the S-shaped cambered surfaces on the vehicle doors on two sides are in concave-convex coupling contact.
According to a third aspect of the embodiments of the present invention, there is provided an optimal design method of a vehicle door sealing structure, including:
establishing a finite element model for the vehicle door structure, and analyzing the prestress state of a sealing element when the vehicle door is closed;
applying a track spectrum of the sealing element in the prestressed state during vehicle running to obtain the nominal strain of the sealing element;
carrying out fatigue damage analysis of the sealing element based on a Thomas crack propagation model;
obtaining the fatigue life of the sealing element when the vehicle runs based on the fatigue damage analysis result;
if the service life meets the set requirement, the vehicle door sealing structure meets the requirement; otherwise, adjusting the material of the sealing element, and repeating the process until the service life meets the requirement.
According to a fourth aspect of the embodiment of the present invention, there is provided a vehicle door structure including the vehicle door seal structure described above.
According to a fifth aspect of the embodiment of the invention, a rail transit vehicle is provided, which comprises the vehicle door structure.
Compared with the prior art, the invention has the beneficial effects that:
(1) the vehicle door sealing structure can reduce the transmission of external noise into a passenger room space, improve the comfort of passengers, effectively prevent dust, rainwater and the like from corroding the vehicle door and parts nearby the vehicle door, and prolong the service life of the vehicle door.
(2) The concave cambered surface of the sealing element at the bottom surface of the vehicle door is coupled with the convex metal strip of the vehicle body floor, the soft rubber strip in the concave cambered surface is tightly contacted under the extrusion action of the bulge of the metal strip, and the soft rubber strip is only under the action of pressure load in the sealing extrusion process, so that the fatigue resistance of the sealing element is greatly improved.
(3) The sealing retainer for the bottom surface of the vehicle door is prepared from high-hardness rubber, and the outer end surface of the sealing retainer is in convex coupling contact with the metal strip, so that the rigidity of the retaining retainer is obviously enhanced, the integral swing frequency and amplitude of the sealing element for the bottom surface of the vehicle door are reduced, and the sealing performance and the service life of the sealing retainer are greatly improved.
(4) The side sealing retainer of the vehicle door is prepared from high-hardness rubber, the connecting piece is made of high-hardness rubber material outside the inner aluminum alloy framework, the rubber retainer and the snap ring are arranged in a sectional type staggered manner, and the adjacent sealing pieces are in convex coupling contact, so that the rigidity of the retainer is obviously enhanced, the integral swing frequency and amplitude of the side sealing pieces are reduced, and the sealing performance and the service life of the side sealing pieces are greatly improved.
(5) The concave cambered surface and the convex cambered surface of the outer end surface of the sealing element between the vehicle doors at two sides are coupled, the soft rubber strips attached to the concave cambered surfaces are tightly contacted under the action of the convex extrusion of the adjacent side face sealing retainer, and the soft rubber strips are only under the action of pressure load in the sealing extrusion process, so that the fatigue resistance of the sealing element is greatly improved.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a door underbody seal configuration according to an embodiment of the present invention;
FIG. 2 is a schematic view of a door side seal configuration according to an embodiment of the present invention;
FIG. 3 is a schematic view of a two side door side seal contact according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a two side door link misalignment arrangement according to an embodiment of the present invention.
FIG. 5 is a schematic view of a vehicle door according to an embodiment of the present invention;
the automobile door sealing structure comprises an automobile door 1, a sealing retainer 2, an end cover 3, a soft sealing layer 4, a boss metal strip 5, a clamping ring 6, a connecting block 7, an automobile door bottom sealing element 8, an automobile door side sealing element 9 and an automobile body sealing strip contact area 10.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example one
According to an embodiment of the present invention, there is provided an embodiment of a vehicle door sealing structure, referring to fig. 1, including: the sealing piece is arranged at the bottom of the vehicle door 1, and the sealing piece is matched with a sealing surface on the floor of the vehicle body to realize sealing between the bottom of the vehicle door 1 and the vehicle body.
In this embodiment, the seal at the bottom of the door is a continuous seal having a constant longitudinal section, and is attached along the longitudinal direction of the bottom of the door 1.
The structure of the sealing member includes: the sealing retainer 2 is of a hollow structure, so that the structural stability of the sealing retainer is improved while the light weight is ensured; the whole shape of the longitudinal section of the sealing retainer is hyperbolic, and the sealing retainer is arranged along the bottom surface of the vehicle door, so that the contact area between the sealing retainer and the sealing surface of the vehicle door and the sealing surface of the vehicle body floor can be maximized while the structural stability is met, and the sealing effect is enhanced; here, the longitudinal section refers to a longitudinal section in the seal width direction.
The bottom of the sealing retainer 2 is provided with an inwards concave cambered surface in the length direction, a soft sealing layer 4 is laid on the cambered surface, the cambered surface is matched with a boss metal strip 5 on a vehicle body sealing surface, and the soft sealing layer 4 can enable the cambered surface to be in close coupling contact with the bulge.
In this embodiment, the soft sealing layer 4 may be a soft rubber strip; the soft rubber strip can be made of rubber, and can also be made of other super-elastic rubber materials with sealing performance, such as PVC and the like.
When the rail vehicle door is closed, the concave cambered surface is coupled with the convex metal strip of the vehicle body floor, the soft rubber strip in the concave cambered surface is tightly contacted under the action of the convex extrusion of the metal strip, the soft rubber strip is only under the action of pressure load in the sealing extrusion process, and the fatigue resistance of the soft rubber strip is greatly improved.
In the embodiment, the rubber retainer is prepared from high-hardness rubber, ethylene propylene diene monomer rubber can be used as a main raw material and is supplemented with other fillers, and other rubber types can be selected under the conditions of meeting the service performance and the service life; and the end face of the bottom is in coupling contact with the metal strip protrusion, so that the rigidity of the retainer is obviously enhanced, the integral swing frequency and amplitude of the bottom sealing element are reduced, and the sealing performance and the service life of the bottom sealing element are greatly improved.
As an optional embodiment, the two hollow end faces of the sealing retainer 2 in the length direction are respectively provided with the end covers 3, the end covers 3 are embedded into the rubber retainer side and are fixed in an adhesive mode, and therefore the phenomenon that other corrosive media such as rainwater and the like are poured into the inner wall of the retainer to corrode the retainer is avoided, and the service life of the retainer is further influenced. Of course, the end cap 3 and the seal holder 2 may also be connected in other forms, such as: hinged, etc.
As an alternative embodiment, referring to fig. 1, a trapezoidal connecting block 7 is disposed on an end surface of the seal holder 2 connected to the bottom of the vehicle door, a sliding groove matched with the connecting block 7 is disposed at the bottom of the vehicle door, and the seal holder and the bottom of the vehicle door are connected to the sliding groove through the connecting block 7, however, those skilled in the art may also adopt other connection methods, such as: bonding, snap-fit connection, and the like.
In this embodiment, along 2 length direction of sealed holder, sealed holder is all the time with the protruding extrusion coupling contact of automobile body floor metal strip to realized the sealing performance of vehicle door bottom, reduced external noise and introduced into the guest room, effectively prevented dust, rainwater simultaneously and got into door and near region, promoted the life of passenger's travelling comfort and door.
In the embodiment, the main function of the sealing retainer 2 is to keep high lateral stability on the basis of proper compression deformation, so that the shore hardness of the rubber of the sealing retainer is more than 70; the soft rubber strip mainly provides sealing performance, has good elastic performance, and is easy to deform greatly along with a contact state, so that the Shore hardness of the soft rubber strip is controlled to be 35-50.
As an alternative embodiment, the hardness of the seal retainer 2 and the soft rubber strip can be obtained through a matching test, that is, the grade requirement of the sealing performance is met within the range of suitable hardness values of the seal retainer and the soft rubber strip, and the lateral stability of the rubber retainer is higher, so that the service life of the rubber retainer is prolonged.
Example two
According to an embodiment of the present invention, an embodiment of a vehicle door sealing structure is provided, and referring to fig. 2, the vehicle door sealing structure includes at least one section of sealing member respectively disposed at opposite side surfaces of two sides of a vehicle door 1;
the sealing member includes: the sealing retainer 2 is of a hollow structure, so that the structural stability of the sealing retainer is improved while the light weight is ensured; the whole shape of the longitudinal section of the sealing retainer is hyperbolic, and the sealing retainer is arranged along the side face of the vehicle door, so that the contact area between the sealing retainer and the side face of the vehicle door and between the sealing retainer can be maximized while the structural stability is met, and the sealing effect is enhanced; here, the longitudinal section refers to a longitudinal section in the seal width direction.
In the embodiment, the first side surface of the sealing retainer 2 is an S-shaped cambered surface in the length direction, and a soft sealing layer 4 is laid on the concave cambered surface of the S-shaped cambered surface; the first side surface refers to a surface of the seal holder opposite to the other door side surface.
In this embodiment, the soft sealing layer 4 may be a soft rubber strip; the soft rubber strip can be made of rubber, and can also be made of other super-elastic rubber materials with sealing performance, such as PVC and the like.
Referring to fig. 3, after the doors are closed, the concave arc surface and the convex arc surface of the first side surface of the sealing retainer 2 between the two doors are coupled, the soft rubber strips attached to the concave arc surfaces are tightly contacted under the extrusion action of the convex arc surfaces of the sealing retainers on the adjacent side surfaces, the soft rubber strips are only under the action of pressure load in the sealing extrusion process, and the fatigue resistance performance is greatly improved.
The S-shaped cambered surface of the embodiment can enable the two sealing elements to form two times of coupling contact after the two doors are butted and sealed, and the sealing performance is better compared with that of single coupling contact. And the sealing parts on the two sides have completely consistent structures, so that the production cost of different types of sealing parts can be reduced, and the interchangeability and the use efficiency of the sealing parts are improved.
In the embodiment, the sealing retainer is prepared from high-hardness rubber, ethylene propylene diene monomer rubber can be used as a main raw material and is supplemented with other fillers, and other rubber types can be selected under the conditions of meeting the service performance and prolonging the service life.
As an embodiment, when the sealing retainer 2 is a continuous one-section structure, in order to ensure the rigidity of the sealing retainer, aluminum alloy rings are embedded in set positions in the sealing retainer, and the aluminum alloy rings embedded in the sealing retainer on the side surfaces of the two doors are arranged in a staggered manner, so that the rigidity of the retainer is obviously enhanced, the overall swing frequency and amplitude of a side sealing element are reduced, and the sealing performance and the service life of the side sealing element are greatly improved.
In another embodiment, when the seal holder 2 is a combination of multi-stage structures, two adjacent seal holders are connected by a connecting member, in this embodiment, the connecting member is a snap ring 6, referring to fig. 2, the shape of the snap ring 6 matches the shape of the seal holder 2, and two ends of the snap ring 6 are respectively embedded into two adjacent seal holders so as to connect the two seal holders.
Referring to fig. 4, in order to ensure the sealing performance, the positions of the snap rings 6 or the aluminum alloy rings on the two side doors are arranged in a staggered manner.
As an optional embodiment, the two hollow end faces of the sealing retainer 2 in the length direction are respectively provided with the end covers 3, the end covers 3 are embedded into the rubber retainer side and are fixed in an adhesive mode, and therefore the phenomenon that other corrosive media such as rainwater and the like are poured into the inner wall of the retainer to corrode the retainer is avoided, and the service life of the retainer is further influenced. Of course, the end cap 3 and the seal holder 2 may also be connected in other forms, such as: hinged, etc.
As an optional implementation manner, referring to fig. 2, trapezoidal connecting blocks 7 are arranged on end surfaces, connected to the side surfaces of the vehicle door, of the seal holder 2 and the snap ring 6, a sliding groove matched with the connecting blocks 7 is arranged on the side surfaces of the vehicle door, and the seal holder and the snap ring are respectively connected to the side surfaces of the vehicle door through the connecting blocks 7 and the sliding groove, which is a matter of course, those skilled in the art may also adopt other connection manners, such as: bonding, snap-fit connection, and the like.
In this embodiment, along sealed holder length direction, the unsmooth coupling contact gap of both sides door sealed holder is zero to realized the sealing performance between the vehicle door, reduced external noise and introduced into the guest room, effectively prevented dust, rainwater simultaneously and got into door and near region, promoted the life of passenger's travelling comfort and door.
In this embodiment, the arrangement position of the snap ring 6 should be reasonably selected according to the sealing performance and the stress relationship of the sealing element, so as to ensure the sealing performance and the service life of the product. The snap ring position setting step is as follows:
s1, in order to ensure the sealing performance of sealing elements on two sides of a vehicle door, clamping rings of the sealing elements on the two sides of the vehicle door are required to be arranged in a staggered mode, which is a basic principle of distribution of the clamping rings 6;
s2, carrying out mechanical property tests of the rubber, mainly comprising a tensile test, a shear test and a volume test, and carrying out super-elastic constitutive fitting on the rubber material according to a tested material stress-strain curve so as to carry out stress analysis and fatigue life prediction on the sealing element structure by adopting a numerical simulation method in the following process;
and S3, carrying out finite element stress analysis on the extrusion state of the adjacent continuous unsegmented sealing element after the vehicle door is closed, and preliminarily determining the distribution position of the snap ring according to the stress lateral deformation result of the rubber retainer. The specific operation is as follows: the sealing retainer is divided at a position where the loaded side direction of the sealing retainer is greatly deformed, and a clamping ring is arranged at the cutting position;
s4, establishing a continuous sectional type side sealing element model according to the distribution positions of the clamping rings, carrying out finite element analysis on the model, further optimizing the positions of the clamping rings according to the lateral rigidity (deformation) of the sealing retainer in an analysis result, and finally realizing that the lateral deformation of 2-4 sealing elements is minimum by using the clamping rings in a sealing element compression state in a specific optimization mode such as the continuous iteration of the step S4;
and S5, designing a distribution scheme according to the optimization result and completing the installation of the snap ring.
In this embodiment, the hardness of the seal retainer and the soft rubber strip refers to the scheme disclosed in the first embodiment, and is not described in detail.
EXAMPLE III
According to the embodiment of the invention, an embodiment of a vehicle door sealing structure is provided, and referring to fig. 5, vehicle doors 1 are arranged on two sides of a passenger compartment of a railway vehicle, the vehicle doors 1 are consistent with the vehicle body of the railway vehicle in an arc shape, the appearance of the vehicle is kept smooth, and therefore the aerodynamic resistance of the vehicle during running is reduced. The door is sandwich structure, and two superficial layers mainly are panel beating stamping forming, and middle sandwich layer is soundproof cotton and is assisted with connection frame structure, guarantees door bulk connection intensity and bearing capacity. Sealing parts and a vehicle body sealing part contact area 10 are arranged on the periphery of the vehicle door, so that the sealing and sound insulation performance of the vehicle after the vehicle door 1 is closed is guaranteed.
The door bottom seal 8 described in the first embodiment is provided on the door bottom surface, the door side seal 9 described in the second embodiment is provided on the door side surface, and the rubber seals in the other two directions are conventional common seals and are attached to the door frame of the vehicle body.
When the door of the railway vehicle is opened, the locking device is opened, the door is lifted by 2-5 mm at first, the sealing rubber on the end surface of the upper side is compressed to enable the metal protrusion and the concave cambered surface of the rubber retainer of the ground sealing element to be in coupling contact and separated, then the door is pushed outwards and then translated towards two sides, and the door is opened; when the door is closed, the travel path of the door is opposite to the command when the door is opened.
Those skilled in the art will appreciate that the seal described in the first embodiment may be provided only on the underside of the door, and other locations are conventional seals; the sealing member described in the second embodiment may be provided only on the side surface of the vehicle door, and the other positions are the existing common sealing members.
Example four
According to an embodiment of the invention, an embodiment of the rail transit vehicle is provided, which comprises the vehicle door structure in the third embodiment.
EXAMPLE five
According to the embodiment of the invention, the embodiment of the optimized design method of the vehicle door sealing structure is provided, and comprises the following steps:
s1, establishing a finite element model according to a vehicle door structure, and analyzing the prestress state of a sealing element when a vehicle door is closed;
s2, applying a track spectrum (PSD) of the sealing element in the prestressed state during vehicle running, analyzing to obtain the nominal strain of the sealing element, and simultaneously carrying out fatigue damage analysis of the sealing element based on a Thomas crack propagation model;
and S3, obtaining the fatigue life of the sealing element when the vehicle runs according to the fatigue analysis result, if the life is more than 200 ten thousand times, meeting the service life requirement, and if the life is less than 200 ten thousand times, improving the material of the sealing element again to meet the actual service life requirement of the sealing element.
And S4, mounting the vehicle door on an actual running vehicle, and checking the sealing performance and the actual service life of the vehicle door.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (20)
1. The optimized design method of the vehicle door sealing structure comprises a sealing element arranged at the bottom of a vehicle door; the seal includes: the sealing retainer meets the set hardness requirement, the bottom of the sealing retainer is provided with an inward cambered surface in the length direction, and the cambered surface is matched with a bulge on a sealing surface of a vehicle body; laying a soft sealing layer on the cambered surface, wherein the soft sealing layer can enable the cambered surface to be in close coupling contact with the protrusions;
the method is characterized by comprising the following steps of:
step 1: establishing a finite element model for the vehicle door structure, and analyzing the prestress state of a sealing element when the vehicle door is closed;
step 2: applying a track spectrum of the sealing element in the prestressed state during vehicle running to obtain the nominal strain of the sealing element;
and step 3: carrying out fatigue damage analysis of the sealing element based on a Thomas crack propagation model;
and 4, step 4: obtaining the fatigue life of the sealing element when the vehicle runs based on the fatigue damage analysis result;
and 5: if the service life meets the set requirement, the vehicle door sealing structure meets the requirement; otherwise, adjusting the material of the sealing element, and repeating the steps 1 to 4 until the service life meets the requirement.
2. The method of claim 1, wherein the longitudinal section of the seal holder is a hyperboloid type.
3. The method for optimally designing the sealing structure of the vehicle door as claimed in claim 1, wherein the seal holder is made of rubber of a set hardness.
4. The method for optimally designing the vehicle door sealing structure as claimed in claim 1, wherein the seal holder is a hollow structure, and end caps are respectively arranged on two end faces of the seal holder in the length direction.
5. The method for optimally designing the sealing structure of the vehicle door as claimed in claim 1, wherein the sealing retainer is connected with the bottom of the vehicle door in a mode that a connecting block is matched with the sliding groove.
6. The optimized design method of the vehicle door sealing structure comprises at least one section of sealing element which is respectively arranged on the opposite side surfaces of vehicle doors at two sides; the seal includes: the sealing retainer meets the set hardness requirement, the first side surface of the sealing retainer is an S-shaped cambered surface in the length direction, and a soft sealing layer is laid on the concave cambered surface of the S-shaped cambered surface; when the vehicle door is in a closed state, the S-shaped cambered surfaces on the vehicle doors on two sides are in concave-convex coupling contact;
the method is characterized by comprising the following steps of:
step 1: establishing a finite element model for the vehicle door structure, and analyzing the prestress state of a sealing element when the vehicle door is closed;
step 2: applying a track spectrum of the sealing element in the prestressed state during vehicle running to obtain the nominal strain of the sealing element;
and step 3: carrying out fatigue damage analysis of the sealing element based on a Thomas crack propagation model;
and 4, step 4: obtaining the fatigue life of the sealing element when the vehicle runs based on the fatigue damage analysis result;
and 5: if the service life meets the set requirement, the vehicle door sealing structure meets the requirement; otherwise, adjusting the material of the sealing element, and repeating the steps 1 to 4 until the service life meets the requirement.
7. The method for optimally designing the sealing structure of the vehicle door as claimed in claim 6, wherein when the sealing member is multi-segment, the adjacent two segments of the sealing member are connected by a connecting member.
8. The method for optimally designing the vehicle door sealing structure as claimed in claim 7, wherein finite element force analysis is performed on the extrusion state of the continuous unsegmented sealing element after the vehicle door is closed, and segmentation is performed at the position where the loaded lateral deformation of the sealing retainer is greater than the set threshold value, and the segmentation is performed through a connecting piece.
9. The method of claim 7, wherein finite element stress analysis is performed on the compression state of the segmented seal, and the position of the segments is further optimized based on the loaded lateral deformation of the seal holder.
10. The method for optimally designing the vehicle door sealing structure as claimed in claim 7, wherein the connecting pieces arranged on the side surfaces of the vehicle doors on the two sides are arranged in a staggered manner.
11. The method for optimizing a vehicle door seal structure according to claim 6, wherein when the seal is a segment, a metal ring is inserted at a predetermined position of the seal.
12. The method of claim 11, wherein the metal rings embedded in the side surfaces of the two doors are arranged in a staggered manner.
13. The method of claim 6, wherein the longitudinal section of the seal holder is a hyperboloid type.
14. The method for optimally designing the sealing structure of the vehicle door as claimed in claim 6, wherein the seal holder is made of rubber with set hardness.
15. The method for optimally designing the vehicle door sealing structure as claimed in claim 6, wherein the seal retainer is a hollow structure, and end caps are respectively arranged on two end faces of the seal retainer in the length direction.
16. The method for optimally designing the sealing structure of the vehicle door as claimed in claim 6, wherein the sealing retainer is connected with the side surface of the vehicle door in a mode that a connecting block is matched with the sliding groove.
17. A vehicle door structure characterized by comprising a vehicle door seal structure employing the method of optimizing a vehicle door seal structure according to any one of claims 1 to 5.
18. A vehicle door structure comprising a vehicle door seal structure employing the method of optimizing a vehicle door seal structure according to any one of claims 6 to 16.
19. A vehicle door structure characterized by comprising a vehicle door seal structure, and adopting the method of optimally designing a vehicle door seal structure according to any one of claims 1 to 5 and the method of optimally designing a vehicle door seal structure according to any one of claims 6 to 16.
20. A rail transit vehicle comprising a door structure according to any one of claims 17 to 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266927.1A CN112298236B (en) | 2020-11-13 | 2020-11-13 | Vehicle door sealing structure and optimal design method |
Applications Claiming Priority (1)
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| BE790285A (en) * | 1972-03-22 | 1973-02-15 | Waggon Union Gmbh | TIGHTNESS OF THE VERTICAL ENDS OF THE SLIDING PARTS OF THE WALL |
| JPH1082238A (en) * | 1996-09-05 | 1998-03-31 | Kawasaki Heavy Ind Ltd | Top-railed sliding door |
| AT406361B (en) * | 1997-09-10 | 2000-04-25 | Ife Gmbh | DOUBLE-LEAF PRINTABLE DOOR FOR A RAIL VEHICLE |
| JP4780317B2 (en) * | 2005-04-27 | 2011-09-28 | 東急車輛製造株式会社 | Sliding door device for railway vehicles |
| CN201836381U (en) * | 2010-11-05 | 2011-05-18 | 北汽福田汽车股份有限公司 | Sealing strip, automobile doors and windows sealing system and automobile |
| JPWO2014208516A1 (en) * | 2013-06-28 | 2017-02-23 | ナブテスコ株式会社 | Door seal and vehicle door |
| JP2015094193A (en) * | 2013-11-14 | 2015-05-18 | 三菱重工業株式会社 | Sliding door shielding member and vehicle |
| DE102014214868B3 (en) * | 2014-07-29 | 2016-01-07 | Siemens Aktiengesellschaft | Sliding door with sealed guide rail |
| EP3118040A1 (en) * | 2015-07-15 | 2017-01-18 | AGC Glass Europe | Division set of a car, assembly of the division set with a frameless window and another adjacent window of a car, and process for manufacturing the set and the assembly |
| CN205768574U (en) * | 2016-05-25 | 2016-12-07 | 扬州高新橡塑有限公司 | A kind of rail traffic vehicles clamshell doors sealing strip |
| CN107045567B (en) * | 2017-01-24 | 2020-06-02 | 同济大学 | Window frame structure design method based on vehicle door sealing fine equivalent model |
| CN207004279U (en) * | 2017-07-27 | 2018-02-13 | 石家庄中博汽车有限公司 | A kind of pure electric coach opposite opened stopping sliding door |
| CN109318916B (en) * | 2018-11-23 | 2024-02-13 | 中车长春轨道客车股份有限公司 | Comprehensive positioning device for assembling built-in door system of high-speed train |
| CN211308566U (en) * | 2019-11-30 | 2020-08-21 | 北京博得交通设备有限公司 | Rubber strip for sealing on subway door |
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